What a great image of bones! This December 3, 2020 University of Arkansas news release (also on EurekAlert) by Matt McGowan features research focused on bone material looks exciting. The date for the second study citation and link that I have listed (at the end of this posting) suggests the more recent study may have been initially overlooked in the deluge of COVID-19 research we are experiencing,
University of Arkansas researchers Marco Fielder and Arun Nair have conducted the first study of the combined nanoscale effects of water and mineral content on the deformation mechanisms and thermal properties of collagen, the essence of bone material.
The researchers also compared the results to the same properties of non-mineralized collagen reinforced with carbon nanotubes, which have shown promise as a reinforcing material for bio-composites. This research aids in the development of synthetic materials to mimic bone.
Using molecular dynamics — in this case a computer simulation of the physical movements of atoms and molecules — Nair and Fielder examined the mechanics and thermal properties of collagen-based bio-composites containing different weight percentages of minerals, water and carbon nanotubes when subjected to external loads.
They found that variations of water and mineral content had a strong impact on the mechanical behavior and properties of the bio-composites, the structure of which mimics nanoscale bone composition. With increased hydration, the bio-composites became more vulnerable to stress. Additionally, Nair and Fielder found that the presence of carbon nanotubes in non-mineralized collagen reduced the deformation of the gap regions.
The researchers also tested stiffness, which is the standard measurement of a material’s resistance to deformation. Both mineralized and non-mineralized collagen bio-composites demonstrated less stability with greater water content. Composites with 40% mineralization were twice as strong as those without minerals, regardless of the amount of water content. Stiffness of composites with carbon nanotubes was comparable to that of the mineralized collagen.
“As the degree of mineralization or carbon nanotube content of the collagenous bio-composites increased, the effect of water to change the magnitude of deformation decreased,” Fielder said.
The bio-composites made of collagen and carbon nanotubes were also found to have a higher specific heat than the studied mineralized collagen bio-composites, making them more likely to be resistant to thermal damage that could occur during implantation or functional use of the composite. Like most biological materials, bone is a hierarchical – with different structures at different length scales. At the microscale level, bone is made of collagen fibers, composed of smaller nanofibers called fibrils, which are a composite of collagen proteins, mineralized crystals called apatite and water. Collagen fibrils overlap each other in some areas and are separated by gaps in other areas.
“Though several studies have characterized the mechanics of fibrils, the effects of variation and distribution of water and mineral content in fibril gap and overlap regions are unexplored,” said Nair, who is an associate professor of mechanical engineering. “Exploring these regions builds an understanding of the structure of bone, which is important for uncovering its material properties. If we understand these properties, we can design and build better bio-inspired materials and bio-composites.”
Here are links and citations for both papers mentioned in the news release,
There’s a lot of arsenic in the world and it’s often a factor in making water undrinkable. When that water is used in farming It also pollutes soil and enters food-producing plants. A December 11, 2020 news item on Nanowerk announces research into arsenic detectors in plants,
Researchers have developed a living plant-based sensor that can in real-time detect and monitor levels of arsenic, a highly toxic heavy metal, in the soil. Arsenic pollution is a major threat to humans and ecosystems in many Asia Pacific countries.
Scientists from the Disruptive and Sustainable Technologies for Agricultural Precision (DiSTAP) research group at the Singapore-MIT Alliance for Research and Technology (SMART), MIT’s research enterprise in Singapore, have engineered a novel type of plant nanobionic optical sensor that can detect and monitor, in real time, levels of the highly toxic heavy metal arsenic in the underground environment. This development provides significant advantages over conventional methods used to measure arsenic in the environment and will be important for both environmental monitoring and agricultural applications to safeguard food safety, as arsenic is a contaminant in many common agricultural products such as rice, vegetables, and tea leaves.
Arsenic and its compounds are a serious threat to humans and ecosystems. Long-term exposure to arsenic in humans can cause a wide range of detrimental health effects, including cardiovascular disease such as heart attack, diabetes, birth defects, severe skin lesions, and numerous cancers including those of the skin, bladder, and lung. Elevated levels of soil arsenic as a result of anthropogenic activities such as mining and smelting are also harmful to plants, inhibiting growth and resulting in substantial crop losses.
Food crops can absorb arsenic from the soil, leading to contamination of food and produce consumed by humans. Arsenic in underground environments can also contaminate groundwater and other underground water sources, the long-term consumption of which can cause severe health issues. As such, developing accurate, effective, and easy-to-deploy arsenic sensors is important to protect both the agriculture industry and wider environmental safety.
The novel optical nanosensors exhibit changes in their fluorescence intensity upon detecting arsenic. Embedded in plant tissues, with no detrimental effects on the plant, these sensors provide a nondestructive way to monitor the internal dynamics of arsenic taken up by plants from the soil. This integration of optical nanosensors within living plants enables the conversion of plants into self-powered detectors of arsenic from their natural environment, marking a significant upgrade from the time- and equipment-intensive arsenic sampling methods of current conventional methods.
“Our plant-based nanosensor is notable not only for being the first of its kind, but also for the significant advantages it confers over conventional methods of measuring arsenic levels in the below-ground environment, requiring less time, equipment, and manpower,” says Lew. “We envision that this innovation will eventually see wide use in the agriculture industry and beyond. I am grateful to SMART DiSTAP and the Temasek Life Sciences Laboratory (TLL), both of which were instrumental in idea generation and scientific discussion as well as research funding for this work.”
Besides detecting arsenic in rice and spinach, the team also used a species of fern, Pteris cretica, which can hyperaccumulate arsenic. This fern species can absorb and tolerate high levels of arsenic with no detrimental effect — engineering an ultrasensitive plant-based arsenic detector, capable of detecting very low concentrations of arsenic, as low as 0.2 parts per billion. In contrast, the regulatory limit for arsenic detectors is 10 parts per billion. Notably, the novel nanosensors can also be integrated into other species of plants. The researchers say this is the first successful demonstration of living plant-based sensors for arsenic and represents a groundbreaking advancement that could prove highly useful in both agricultural research (e.g., to monitor arsenic taken up by edible crops for food safety) and general environmental monitoring.
Previously, conventional methods of measuring arsenic levels included regular field sampling, plant tissue digestion, extraction, and analysis using mass spectrometry. These methods are time-consuming, require extensive sample treatment, and often involve the use of bulky and expensive instrumentation. The new approach couples nanoparticle sensors with plants’ natural ability to efficiently extract analytes via the roots and transport them. This allows for the detection of arsenic uptake in living plants in real time, with portable, inexpensive electronics such as a portable Raspberry Pi platform equipped with a charge-coupled device camera akin to a smartphone camera.
Co-author, DiSTAP co-lead principal investigator, and MIT Professor Michael Strano adds, “This is a hugely exciting development, as, for the first time, we have developed a nanobionic sensor that can detect arsenic — a serious environmental contaminant and potential public health threat. With its myriad advantages over older methods of arsenic detection, this novel sensor could be a game-changer, as it is not only more time-efficient, but also more accurate and easier to deploy than older methods. It will also help plant scientists in organizations such as TLL to further produce crops that resist uptake of toxic elements. Inspired by TLL’s recent efforts to create rice crops which take up less arsenic, this work is a parallel effort to further support SMART DiSTAP’s efforts in food security research, constantly innovating and developing new technological capabilities to improve Singapore’s food quality and safety.”
The research is carried out by SMART and supported by the National Research Foundation (NRF) Singapore under its Campus for Research Excellence And Technological Enterprise (CREATE) program.
Led by MIT’s Strano and Singapore co-lead principal investigator Professor Chua Nam Hai, DiSTAP is one of the five Interdisciplinary Research Groups (IRGs) in SMART. The DiSTAP program addresses deep problems in food production in Singapore and the world by developing a suite of impactful and novel analytical genetic and biosynthetic technologies. The goal is to fundamentally change how plant biosynthetic pathways are discovered, monitored, engineered, and ultimately translated to meet the global demand for food and nutrients. Scientists from MIT, TTL, Nanyang Technological University, and National University of Singapore are collaboratively developing new tools for the continuous measurement of important plant metabolites and hormones for novel discovery, deeper understanding and control of plant biosynthetic pathways in ways not yet possible, especially in the context of green leafy vegetables; leveraging these new techniques to engineer plants with highly desirable properties for global food security, including high yield density production, drought and pathogen resistance and biosynthesis of high-value commercial products; developing tools for producing hydrophobic food components in industry-relevant microbes; developing novel microbial and enzymatic technologies to produce volatile organic compounds that can protect and/or promote growth of leafy vegetables; and applying these technologies to improve urban farming.
Although most of the planet is covered by water, only a fraction of it is clean enough for humans to use. Therefore, it is important to recycle this resource whenever possible. Current purification techniques cannot adequately handle the very hot wastewater generated by some industries.
Some oil recovery methods and other industrial processes result in hot wastewater, which requires energy-intensive cooling before it can be purified through traditional reverse osmosis membranes. After purification, the water then needs to be heated before it can be re-used. At such high temperatures, traditional reverse osmosis membranes filter slowly, allowing more salts, solids and other contaminants to get through. Researchers have embedded extremely tiny nanodiamonds — carbon spheres produced by explosions in small, closed containers without oxygen present — onto these membranes in previous studies. Although the membranes effectively and quickly filtered large volumes of water and can protect against fouling, they were not tested with very hot samples. To optimize the membranes for use with hot wastewater, Khorshidi, Sadrzadeh and colleagues wanted to modify the nanodiamond spheres and embed them in a new way.
The team attached amines to nanodiamonds and bathed them in an ethyl acetate solution to prevent the spheres from clumping. Then, a monomer was added that reacted with the amines to create chemical links to the traditional membrane base. Synergistic effects of the amine links and the ethyl acetate treatment resulted in thicker, more temperature-stable membranes, contributing to improvements in their performance. By increasing the amount of amine-enhanced nanodiamonds in the membrane, the researchers obtained higher filtration rates with a greater proportion of impurities being removed, even after 9 hours at 167 F, when compared to membranes without nanodiamonds. The new method produced membranes that could more effectively treat wastewater at high temperatures, the researchers say.
More and more, this resembles a public relations campaign. First, CRISPR (clustered regularly interspersed short palindromic repeats) gene editing is going to be helpful with COVID-19 and now it can help us to deal with conservation issues. (See my May 26, 2020 posting about the latest CRISPR doings as of May 7, 2020; included is a brief description of the patent dispute between Broad Institute and UC Berkeley and musings about a public relations campaign.)
The gene-editing technology CRISPR has been used for a variety of agricultural and public health purposes — from growing disease-resistant crops to, more recently, a diagnostic test for the virus that causes COVID-19. Now a study involving fish that look nearly identical to the endangered Delta smelt finds that CRISPR can be a conservation and resource management tool, as well. The researchers think its ability to rapidly detect and differentiate among species could revolutionize environmental monitoring.
The study, published in the journal Molecular Ecology Resources, was led by scientists at the University of California, Davis, and the California Department of Water Resources in collaboration with MIT Broad Institute [emphasis mine].
As a proof of concept, it found that the CRISPR-based detection platform SHERLOCK (Specific High-sensitivity Enzymatic Reporter Unlocking) [emphasis mine] was able to genetically distinguish threatened fish species from similar-looking nonnative species in nearly real time, with no need to extract DNA.
“CRISPR can do a lot more than edit genomes,” said co-author Andrea Schreier, an adjunct assistant professor in the UC Davis animal science department. “It can be used for some really cool ecological applications, and we’re just now exploring that.”
WHEN GETTING IT WRONG IS A BIG DEAL
The scientists focused on three fish species of management concern in the San Francisco Estuary: the U.S. threatened and California endangered Delta smelt, the California threatened longfin smelt and the nonnative wakasagi. These three species are notoriously difficult to visually identify, particularly in their younger stages.
Hundreds of thousands of Delta smelt once lived in the Sacramento-San Joaquin Delta before the population crashed in the 1980s. Only a few thousand are estimated to remain in the wild.
“When you’re trying to identify an endangered species, getting it wrong is a big deal,” said lead author Melinda Baerwald, a project scientist at UC Davis at the time the study was conceived and currently an environmental program manager with California Department of Water Resources.
For example, state and federal water pumping projects have to reduce water exports if enough endangered species, like Delta smelt or winter-run chinook salmon, get sucked into the pumps. Rapid identification makes real-time decision making about water operations feasible.
FROM HOURS TO MINUTES
Typically to accurately identify the species, researchers rub a swab over the fish to collect a mucus sample or take a fin clip for a tissue sample. Then they drive or ship it to a lab for a genetic identification test and await the results. Not counting travel time, that can take, at best, about four hours.
SHERLOCK shortens this process from hours to minutes. Researchers can identify the species within about 20 minutes, at remote locations, noninvasively, with no specialized lab equipment. Instead, they use either a handheld fluorescence reader or a flow strip that works much like a pregnancy test — a band on the strip shows if the target species is present.
“Anyone working anywhere could use this tool to quickly come up with a species identification,” Schreier said.
OTHER CRYPTIC CRITTERS
While the three fish species were the only animals tested for this study, the researchers expect the method could be used for other species, though more research is needed to confirm. If so, this sort of onsite, real-time capability may be useful for confirming species at crime scenes, in the animal trade at border crossings, for monitoring poaching, and for other animal and human health applications.
“There are a lot of cryptic species we can’t accurately identify with our naked eye,” Baerwald said. “Our partners at MIT are really interested in pathogen detection for humans. We’re interested in pathogen detection for animals as well as using the tool for other conservation issues.”
SHERLOCK is an evolution of CRISPR technology, which others use to make precise edits in genetic code. SHERLOCK can detect the unique genetic fingerprints of virtually any DNA or RNA sequence in any organism or pathogen. Developed by our founders and licensed exclusively from the Broad Institute, SHERLOCK is a method for single molecule detection of nucleic acid targets and stands for Specific High Sensitivity Enzymatic Reporter unLOCKing. It works by amplifying genetic sequences and programming a CRISPR molecule to detect the presence of a specific genetic signature in a sample, which can also be quantified. When it finds those signatures, the CRISPR enzyme is activated and releases a robust signal. This signal can be adapted to work on a simple paper strip test, in laboratory equipment, or to provide an electrochemical readout that can be read with a mobile phone.
Ensuring the SHERLOCK diagnostic platform is easily accessible, especially in the developing world, where the need for inexpensive, reliable, field-based diagnostics is the most urgent
SHERLOCK (Specific High-sensitivity Enzymatic Reporter unLOCKing) is a CRISPR-based diagnostic tool that is rapid, inexpensive, and highly sensitive, with the potential to have a transformative effect on research and global public health. The SHERLOCK platform can detect viruses, bacteria, or other targets in clinical samples such as urine or blood, and reveal results on a paper strip — without the need for extensive specialized equipment. This technology could potentially be used to aid the response to infectious disease outbreaks, monitor antibiotic resistance, detect cancer, and more. SHERLOCK tools are freely available [emphasis mine] for academic research worldwide, and the Broad Institute’s licensing framework [emphasis mine] ensures that the SHERLOCK diagnostic platform is easily accessible in the developing world, where inexpensive, reliable, field-based diagnostics are urgently needed.
Here’s what I suspect. as stated, the Broad Institute has free SHERLOCK licenses for academic institutions and not-for-profit organizations but Sherlock Biosciences, a Broad Institute spinoff company, is for-profit and has trademarked SHERLOCK for commercial purposes.
This looks like a relatively subtle campaign to influence public perceptions. Genetic modification or genetic engineering as exemplified by the CRISPR gene editing technique is a force for the good of all. It will help us in our hour of need (COVID-19 pandemic) and it can help us save various species and better manage our resources.
This contrasts greatly with the publicity generated by the CRISPR twins situation where a scientist claimed to have successfully edited the germline for twins, Lulu and Nana. This was done despite a voluntary, worldwide moratorium on germline editing of viable embryos. (Search the terms [either here or on a standard search engine] ‘CRISPR twins’, ‘Lulu and Nana’, and/or ‘He Jiankui’ for details about the scandal.
In addition to presenting CRISPR as beneficial in the short term rather than the distant future, this publicity also subtly positions the Broad Institute as CRISPR’s owner.
I was hoping this would be the concluding part of this series but there was much more than I dreamed. (I know that’s repetitive but I’m truly gobsmacked.)
Astronomy and bird watching (ornithology) are probably the only two scientific endeavours that have consistently engaged nonexperts/amateurs/citizen scientists right from the earliest days through the 21st century. Medical research, physics, chemistry, and others have, until recently and despite their origins in ‘amateur’ (or citizen) science, become the exclusive domain of professional experts.
This situation seems to be changing both here in Canada and elsewhere. One of the earliest postings about citizen science on this blog was in 2010 and, one of the most amusing to me personally, was this March 21, 2013 posting titled: Comparing techniques, citizen science to expert science. It’s about a study by scientists at the University of East Anglia (UK) comparing data collection by citizen scientists with experts. In this particular project where undersea data was being collected and people with diving skills needed, the citizen scientists did a better job than the expert scientists of collecting data. (I’m not trying to suggest that experts can be replaced by amateurs but do suggest that there are advantages to working together.)
Take a look at your car. The bus you take to work. The smart phone you tap on during your commute. They all have one thing in common: science. Science is all around us. It shapes the way we live, the meals we grab on the go and the commute that takes us to school and work.
That is why the Government of Canada is encouraging young Canadians’ interest in science. Research and innovation lead to breakthroughs in agriculture, transit, medicine, green technology and service delivery, improving the quality of life for all Canadians. The outcomes of research also create jobs, strengthen the economy and support a growing middle class.
The Honourable Kirsty Duncan, Minister of Science and Minister of Sport and Persons with Disabilities, carried that message to an audience of young students during her first citizen science Google Hangout today. The Hangout, run by Exploring by the Seat of Your Pants, a not-for-profit organization, featured frog exhibits from the Toronto Zoo and a demonstration of the FrogWatch citizen science project by Dr. Nancy Kingsbury of Environment and Climate Change Canada. Toronto Zoo frog expert Katherine Wright joined Minister Duncan at the zoo to share information about frogs that are local to Ontario.
Minister Duncan, Dr. Kingsbury and Ms. Wright then engaged with elementary school children across Canada in a live Q&A session about the frogs in their own backyards. The Minister highlighted the importance of getting young Canadians interested in science fields and talked about ways they can take part in citizen science projects in their communities. Citizen scientists can share their observations on social media using the hashtag #ScienceAroundMe.
“Science is for everyone, and it is important that we encourage today’s youth to be curious. Young Canadians who engage in citizen science today will become the highly skilled workers—engineers, scientists, mathematicians, technology experts and entrepreneurs—of tomorrow. Through citizen science, children can nurture an interest in the natural world. These young people will then go on to discover, to innovate and to find solutions that will help us build a better Canada.” – The Honourable Kirsty Duncan, Minister of Science and Minister of Sport and Persons with Disabilities
“The Toronto Zoo is proud to participate in and encourage citizen science programs, such as FrogWatch, within the community. The Toronto Zoo’s Adopt-A-Pond Wetland Conservation Programme works to engage citizen scientists and deliver impactful conservation-focused research, restoration and outreach that highlight the importance of saving Canada’s sensitive wetland species and their habitats.” – Robin Hale, Interim Chief Executive Officer, Toronto Zoo
NatureWatch, of which FrogWatch is a component, is a community program that engages all Canadians in collecting scientific information on nature to understand our changing environment.
Exploring by the Seat of Your Pants aims to inspire the next generation of scientists, explorers and conservationists by bringing science, exploration, adventure and conservation into classrooms through virtual field trips run by programs like Google Hangout.
The Government of Canada’s Citizen Science Portal is a one-stop shop for science in the community. It showcases science programs, including NatureWatch programs, across the country.
The portal is not nearly as Ontario-centric as the projects mentioned in the news release (in case you were wondering).
Aside: In part 2 of this series, Jesse Hildebrand, founder of Science Literacy Week was mentioned as also being the founder of Exploring by the Seat of Your Pants.
Going to the birds
While bird watching and ornithological studies are not new to the Canadian science culture scene, there were some interesting developments in the 2010-19 period.
Canadian Geographic (magazine) sponsored a contest in 2015, the National Bird Project, where almost 50,000 people submitted suggestions for a national bird. Voting online ensued and on August 31, 2016 popular voting was closed. Five birds attracted the top votes and in September 2016, the Royal Canadian Geographical Society put together an expert panel to debate and decide which would be Canada’s national bird. The choice was announced in November 2016 (Canadian Geographic National Bird Project).
The gray jay (Perisoreus canadensis in Latin, Mésangeai du Canada in French) lives in all 13 provinces and territories — the friendly spirit in Canada’s wild northern boreal and mountain forests. It remains in Canada year-round, is neither hunted nor endangered, and from the Atlantic provinces to the West is an indicator of the health of the boreal and mountain forests and climate change, inspiring a conservation philosophy for all kinds of northern land uses. The gray jay has long been important to Indigenous Peoples, and will draw all Canadians to their national and provincial/territorial parks, yet unlike the loon and snowy owl, it is not already a provincial or territorial bird.
Gray jay is a passerine bird belonging to the family Corvidae. It is mostly found in the boreal forest of North America. The bird is fairly large and has pale gray underparts and dark grey upperpart. Gray jay is a friendly bird and often approach human for food. It is also popularly known as the camp robber, whisky jack, and venison-hawk. Gray jay is listed as Least Concern by the IUCN [International Union for Conservation of Nature]. However, the anthropogenic climate change in the southern range may adversely affect its population. In some Fist Nation cultures, the bird is associated with mythological figures including Wisakedjak who was anglicized to Whiskyjack.
For approximately 200 years, the gray jay was known as “Canadian Jay” to the English speakers. The bird was renamed the “gray jay” in 1957 by the American Ornithologists’ Union. However, scientifically the bird is referred to as Perisoreus Canadensis. The bird is found in almost all the provinces of territories of Canada. the preferred habitat for the species is Canada’s boreal and mountain forests. Gray jay is also one of the smartest birds in the world and has almost the same body-to-brain ratio as human beings.
Canadian Georgraphic offers more depth (and a map) in a November 16, 2016 article, by Nick Walker, titled, Canada, meet your national bird (Note: Links have been removed),
With 450 species in the country to choose from, Canadian Geographic’s decision was made neither lightly nor quickly.
This national debate has been running since January 2015, in fact. But after weighing the opinions and preferences of tens of thousands of Canadians, as well as the expertise of our National Conservation Partners at Bird Studies Canada and other ornithologists and conservationists, as well as cultural experts and Indigenous Peoples, that list was narrowed to five birds. And one finalist best met all reasonable criteria.
We give you the gray jay. …
Not only has the gray jay never been recorded outside of North America, the vast majority of its range is in Canada, with only a small percentage crossing into Alaska and the western mountains of the United States. The species’ preferred habitat is Canada’s boreal and mountain forests — ecozones that stretch from coast to coast and into the North, blanketing nearly two-thirds of the country.
Like the Canadian flag when it was selected in 1965, the gray jay is fresh and new and fitting. To quote David Bird, ornithologist and professor emeritus of wildlife biology at Montreal’s McGill University, we cannot think of a more Canadian bird.
Three sets of bird stamps were issued by Canada Post from 2016-2018 saluting “Canada’s avian citizens.” Here’s more from a July 12, 2016 Birds of Canada blog post on the Canada Post website announcing the first series of bird stamps,
Hatched by designer Kosta Tsetsekas and illustrator Keith Martin, these stamps are the first in a three-year series celebrating Canada’s avian citizens. Our first flock includes five official birds: the Atlantic puffin (Newfoundland and Labrador), the great horned owl (Alberta), the common raven (Yukon), the rock ptarmigan (Nunavut) and the sharp-tailed grouse (Saskatchewan).
On behalf of the International Ornithologists’ Union, Vancouver is delighted to welcome ornithologists from around the world to the 27th International Ornithological Congress (IOCongress2018)! Considered the oldest and most prestigious of meetings for bird scientists, the Congress occurs every four years since first being held in Vienna, Austria, in 1884.
Canada has hosted only once previously, Ottawa in 1986, and Vancouver will be the first time the Congress has been on the Pacific Coast of the Americas. The Congress has broad national endorsement, including from the City of Vancouver, the province of British Columbia, Environment Canada, Simon Fraser University, Artists for Conservation, Tourism Vancouver plus an array of scientific societies and conservation organizations.
The convention centre’s webpage features an impressive list of events which were open to the public,
Stars of the Bird World Presentation (August 19): Dr. Rob Butler, chair of the Vancouver International Bird Festival, presents Flyways to Culture: How birds give rise to a cultural awakening, at look at how the growing interest in birds in particular and nature in general, is a foundation for a new Nature Culture in which nature becomes embedded into a west coast culture. 8:30-10 a.m. at the Vancouver Convention Centre. Admission by donation ($10 suggested).
Festival Opening Ceremony – Parade of Birds and a fanfare by Vancouver Symphony Brass Quintet (August 20): The festival begins with a Parade of Birds and a fanfare by the Vancouver Symphony Brass Quintet. The fanfare “Gathering Flock” was composed by Frederick Schipizky. 3:20 p.m. to 5:15 p.m. at the Vancouver Convention Centre.
Artists for Conservation Show (August 22): Artists for Conservation is the official visual arts partner for the festival and congress, showcasing some of the world’s best nature art through its annual juried exhibit, a collaborative mural, artist demo and lecture series and an artist booth expo. Official opening 6-10 p.m. at the Vancouver Convention Centre.
Nature & Bird Expo (until August 25): The three-day Bird Expo is the showcase of birds and nature in Canada, including exhibitors, speakers, yoga, poetry, art and more. Runs until Aug. 25 at the Vancouver Convention Centre. Check out a full event listing at www.vanbirdfest.com/calendar/nature-bird-expo.
Migration Songs – Poetry and Ornithology (August 23): Migration Songs brings together 11 contemporary poets to consider an array of bird species. Each poet was put in conversation with a particular ornithologist or scientist to consider their chosen species collaboratively. The poets involved include well-known west-coast authors, amongst them Governor General’s Award and Griffin Poetry Prize winners. A short book of these collaborations, Migration Songs, with cover art by poet, painter, and weaver Annie Ross, will be available. 6 p.m. at the Vancouver Convention Centre.
Unveiling of the Silent Skies Mural (August 23): A signature event of the week-long Artists for Conservation show is the unveiling of the Silent Skies mural made up of illustrations of the endangered birds of the world — 678 pieces, each depicting a different endangered bird, will make up the 100-foot-long installation that will form the artistic centrepiece for the 8th annual Artists for Conservation Festival, the 27th International Ornithological Congress and Vancouver International Bird Festival. The unveiling takes place at 6:30 p.m. at the Vancouver Convention Centre.
Stewardship Roundtable 2018 (August 24): A forum and showcase of innovative practices championed in B.C. province and beyond, presented by the Stewardship Centre for BC and Bird Studies Canada, in collaboration with the 27th International Ornithological Congress and Vancouver International Bird Festival. 8:30 a.m. until 9 p.m. at the Vancouver Convention Centre. For more information or to register, visit stewardshipcentrebc.ca/programs/wildife-species-risk/stewardship-roundtable.
Closing Ceremony (August 26): The closing ceremony will include remarks from officials and First Nations representatives, and a Heron Dance by the New Dance Centre from Saskatchewan. 5-6:30 p.m. at Vancouver Convention Centre.
I attended the opening ceremony where they announced the final set of stamps in the Birds of Canada series by introducing people who’d dressed for the parade as the birds in question.
The Canadian birding community has continued to create interesting new projects for science outreach. A December 19, 2019 posting by Natasha Barlow for Birds Canada (also known as Bird Studies Canada) announces a new interactive story map,
The Boreal Region is a massive expanse of forests, wetlands, and waterways covering much of the Northern Hemisphere. In Canada, this vast region stretches for 5000 kilometres from Newfoundland and Labrador through the country’s central regions and northwest to the Yukon.
Over 300 bird species regularly breed here, from tiny songbirds like kinglets and warblers to comparatively giant swans and cranes. The Boreal is home to literally billions of birds, and serves as the continent’s bird “nursery” since it is such an important breeding ground.
While extensive tracts of Canada’s northern Boreal still remain largely undisturbed from major industrial development, the human footprint is expanding and much of the southern Boreal is already being exploited for its resources.
Birds Canada, in partnership with the Nature Conservancy of Canada, has created an interactive story map that details the importance of the Boreal region for birds.
Climate change, ecology, and Indigenous knowledge (science)
There is more focus on climate change everywhere in the world and much of the latest energy and focus internationally can be traced to Swedish teenager, Greta Thunberg who turned 17 in January 2020. Her influence has galvanized a number of youth climate strikes in Canada and around the world.
There is a category of science fiction or speculative fiction known as Climate Fiction (cli-fi or clifi). Margaret Atwood (of course) has produced a trilogy in that subgenre of speculative fiction, from the Climate Fiction Wikipedia entry, Note: Links have been removed,
Margaret Atwood explored the subject in her dystopian trilogy Oryx and Crake (2003), The Year of the Flood (2009) and MaddAddam (2013). In Oryx and Crake Atwood presents a world where “social inequality, genetic technology and catastrophic climate change, has finally culminated in some apocalyptic event”. The novel’s protagonist, Jimmy, lives in a “world split between corporate compounds”, gated communities that have grown into city-states and pleeblands, which are “unsafe, populous and polluted” urban areas where the working classes live.
There is some other cli-fi literature by Canadians, notably an anthology of Canadian short stories edited by Bruce Meyer, from a March 9, 2018 review by Emilie Moorhouse published in Canada’s National Observer (review originally published in Prism magazine on March 8, 2018), Note: A link has been removed,
A woman waits in line to get her water ration. She hasn’t had a sip of water in nearly three days. Her mouth is parched; she stumbles as she waits her turn for over an hour in the hot sun. When she he finally gets to the iTap and inserts her card into the machine that controls the water flow, the light turns red and her card is rejected. Her water credits have run out.
This scenario from “The Way of Water” by Nina Munteanu is one of many contained in the recently published anthology of short stories, Cli-Fi: Canadian Tales of Climate Change. The seventeen stories in this book edited by Bruce Meyer examine how humankind might struggle with the potential devastation of climate change in the near or distant future. Soon after I finished reading the book, Cape Town—known in precolonial times as “the place where clouds gather”—announced that it was only a few months away from what it called “Day Zero,” the day the city would officially run out of water, making the similarities between fiction and reality more than unsettling. Munteanu’s story is set in a futuristic Canada that has been mined of all its water by thirsty corporations who have taken over control of the resource. Rain has not fallen on Canadian soil in years due to advances in geoengineering and weather manipulation preventing rain clouds from going anywhere north of the Canada-US border.
Indigenous knowledge (science)
The majority of Canada’s coastline is in the Arctic and climate change in that region is progressing at a disturbing pace. Weather, Climate Change, and Inuit Communities in the Western Canadian Arctic, a September 30, 2017 blog posting, by Dr. Laura Eerkes-Medrano at the University of Victoria (British Columbia) for Historical Climatology describes it this way (Note: A link has been removed),
Global climate change brings with it local weather that communities and cultures have difficulty anticipating. Unpredictable and socially impactful weather is having negative effects on the subsistence, cultural activities, and safety of indigenous peoples in Arctic communities. Since 2013, Professor David Atkinson and his team at the University of Victoria have been working with Inuvialuit communities in Tuktoyaktuk, Ulukhaktok, and Sachs Harbour. The main goal is to understand how impactful weather is affecting residents’ subsistence activities, particularly when they are on the water. The project involves site visits, interviews, and regular phone calls with residents.
Inuvialuit residents regularly observe the waves, winds, snow, and ice conditions that interfere with their hunting, fishing, camping, and other subsistence and cultural activities. In this project, communities identify specific weather events that impact their activities. These events are then linked to the broader atmospheric patterns that cause them. Summaries of the events will be provided to Environment Canada to hopefully assist with the forecasting process.
By taking this approach, the project links Western scientific knowledge and traditional knowledge to generate insights [emphasis mine] into how climate change is affecting Inuvialuit activities in the Canadian Arctic. An oversight committee has been established in each community to give direction to the project. This oversight committee includes representatives from each of the main community organizations, which ensures that the respective organizations provide direction to the project and advise on how to engage residents and communities.
Western science learning from and taking from traditional knowledge is not new. For example, many modern medicines are still derived from traditional remedies. Unfortunately, traditional practitioners have not benefited from sharing their knowledge.
It is to be hoped things are changing with projects like Atkinson’s and another one I mentioned in a December 2, 2019 posting featuring a discovery about ochre (a red dye used for rock art). The dye being examined was produced (in a manner that appears to be unique) in the Babine Lake region of British Columbia and the research may have applications for industrial use leading to economic benefits for the indigenous folks of that region. As important as the benefits, the science team worked closely with the indigenous communities in that area.
Canada will finally have its first Arctic university.
This past week [of December 1, 2019], the Yukon legislature passed a bill to make Yukon College a university. It will be an institution with an Indigenous flavour that will make it as unique as the region it is to serve.
“Everybody knows we’re moving toward something big and something special,” said Tom Ullyett, chairman of the board of governors.
The idea of a northern university has been kicked around since at least 2007 when a survey in all three territories found residents wanted more influence over Arctic research. Northern First Nations have been asking for one for 50 years.
Research is to centre on issues around environmental conservation and sustainable resource development. It will be conducted in a new, $26-million science building funded by Ottawa and currently being designed.
Indigenous content will be baked in.
“It’s about teaching with northern examples,” said Tosh Southwick, in charge of Indigenous engagement. “Every program will have a northern component.”
Science programs will have traditional knowledge embedded in them and talk about ravens and moose instead of, say, flamingos and giraffes. Anthropology classes will teach creation stories alongside archeological evidence.
The institution will report to Yukon’s 14 First Nations as well as to the territorial legislature. More than one-quarter of its current students are Indigenous.
“Our vision is to be that first northern university that focuses on Indigenous governance, that focuses on sustainable natural resources, that focuses on northern climate, and everything that flows from that.”
Climate adaptation and/or choices
While we have participated in a number of initiatives and projects concerned with climate change, I believe there is general agreement we should have done more. That said I would prefer to remain hopeful.
A newly launched institute for climate policy research will have a Yukon connection. Brian Horton, Manager of Northern Climate ExChange at the Yukon Research Centre, has been named to the Canadian Institute for Climate Choices expert advisory panel for Climate Adaptation.
The Institute, launched Tuesday morning, aims to bring clarity to Canada’s climate policy choices. The Institute’s initial report, Charting our Course, describes the current climate landscape in Canada and provides recommendations for policy makers and governments seeking to implement more effective policy.
In order to remain grounded in issues of importance to Canadians, the Institute has appointed three Expert Advisory Panels (Adaptation, Mitigation and Clean Growth) to provide evidence-based research, analysis and engagement advice to support integrative policy decisions.
“It is exciting to have a role to play in this dynamic new network,” said Horton. “The climate is rapidly changing in the North and affecting our landscapes and lives daily. I look forward to contributing a Northern voice to this impactful pan-Canadian expert collaboration.”
At Yukon College, Horton’s research team focusses on applied research of climate impacts and adaptation in Yukon and Northwest Territories. Northern Climate ExChange works with communities, governments, and the private sector to answer questions about permafrost, hydrology, and social factors to facilitate adaptation to climate change.
January 21, 2020 | OTTAWA — Dozens of academics and policy experts today launched the Canadian Institute for Climate Choices, a new independent national research body. The Institute aims to bring clarity to the transformative challenges, opportunities and choices ahead for Canada as governments at all levels work to address climate change.
Experimental Lakes Area
This is a very special research effort originally funded and managed by the Canadian federal government. Rather controversially, Stephen Harper’s Conservative government defunded the research but that may not have been the tragedy many believed (from the Experimental Lakes Area Wikipedia entry),
IISD Experimental Lakes Area (IISD-ELA, known as ELA before 2014) is an internationally unique research station encompassing 58 formerly pristine freshwater lakes in Kenora District Ontario, Canada. Previously run by Fisheries and Oceans Canada, after being de-funded by the Canadian Federal Government, the facility is now managed and operated by the International Institute for Sustainable Development (IISD) and has a mandate to investigate the aquatic effects of a wide variety of stresses on lakes and their catchments. IISD-ELA uses the whole ecosystem approach and makes long-term, whole-lake investigations of freshwater focusing on eutrophication.
In an article published in AAAS’s well-known scientific journal Science, Eric Stokstad described ELA’s “extreme science” as the manipulation of whole lake ecosystem with ELA researchers collecting long-term records for climatology, hydrology, and limnology that address key issues in water management. The site has influenced public policy in water management in Canada, the USA, and around the world.
Minister of State for Science and Technology, Gary Goodyear, argued that “our government has been working hard to ensure that the Experimental Lakes Area facility is transferred to a non-governmental operator better suited to conducting the type of world-class research that can be undertaken at this facility” and that “[t]he federal government has been leading negotiations in order to secure an operator with an international track record.” On April 1, 2014, the International Institute for Sustainable Development announced that it had signed three agreements to ensure that it will be the long-term operator of the research facility and that the facility would henceforth be called IISD Experimental Lakes Area. Since taking over the facility, IISD has expanded the function of the site to include educational and outreach opportunities and a broader research portfolio.
Part 5 is to a large extent a grab bag for everything I didn’t fit into parts 1 -4. As for what you can expect to find in Part 5: some science podcasting, eco art, a Saskatchewan lab with an artist-in-residence, and more.
Canada’s stores of fresh water are not as plentiful as once thought, and threaten to pinch the economy and pit provinces against each other, a federal document says.
An internal report drafted last December  by Environment Canada warns that climate change and a growing population will further drain resources.
“We can no longer take our extensive water supplies for granted,” says the report, titled A Federal Perspective on Water Quantity Issues.
The Canadian Press obtained the 21-page draft report under the Access to Information Act.
It suggests the federal government take a more hands-on role in managing the country’s water, which is now largely done by the provinces. Ottawa still manages most of the fresh water in the North through water boards.
The Conservatives promised a national water strategy in last fall’s throne speech but have been criticized since for announcing only piecemeal projects.
The Tories, like the previous Liberal government, are also behind in publishing annual reports required by law that show how water supplies are used and maintained.
The last assessment posted on Environment Canada’s website is from 2005-06.
The internal draft report says the government currently does not know enough about the country’s water to properly manage it.
‘This is not a crisis yet. Why would we expect any government, regardless of political leaning or level, to do anything about it?’
“Canada lacks sound information at a national scale on the major uses and user[s] of water,” it says.
“National forecasting of water availability has never been done because traditionally our use of the resource was thought to be unlimited.”
Canada has a fifth of the world’s supply of fresh water, but only seven per cent of it is renewable. The rest comes from ice-age glaciers and underground aquifers.
One per cent of Canada’s total water supply is renewed each year by precipitation, the report says.
Moreover, government data on the country’s groundwater reserves is deemed “sparse and often inadequate.”
That’s in contrast to the United States, which has spent more than a decade mapping its underground water reserves. Canada shares aquifers with the U.S., and the report says: “Our lack of data places Canada at strategic disadvantage for bilateral negotiations with the U.S.”
A comprehensive review [World Wildlife Federation: a national assessment of of Canada’s freshwater Watershed Reports; 2017] freshwater ecosystems reveals rising threats from pollution, overuse, invasive species and climate change among other problems. Yet, the biggest threat of all may be a lack of information that hinders effective regulation, Ivan Semeniuk reports. …
Some of that information may be out of date.
Getting back on topic, here’s one possible solution to better managing our use of water.
Every day, more than 141 billion liters of water are used solely to flush toilets. With millions of global citizens experiencing water scarcity, what if that amount could be reduced by 50%?
The possibility may exist through research conducted at Penn State, released today (Nov. 18) in Nature Sustainability.
“Our team has developed a robust bio-inspired, liquid, sludge- and bacteria-repellent coating that can essentially make a toilet self-cleaning,” said Tak-Sing Wong, Wormley Early Career Professor of Engineering and associate professor of mechanical engineering and biomedical engineering.
In the Wong Laboratory for Nature Inspired Engineering, housed within the Department of Mechanical Engineering and the Materials Research Institute, researchers have developed a method that dramatically reduces the amount of water needed to flush a conventional toilet, which usually requires 6 liters.
Co-developed by Jing Wang, a doctoral graduate from Wong’s lab, the liquid-entrenched smooth surface (LESS) coating is a two-step spray that, among other applications, can be applied to a ceramic toilet bowl. The first spray, created from molecularly grafted polymers, is the initial step in building an extremely smooth and liquid-repellent foundation.
“When it dries, the first spray grows molecules that look like little hairs, with a diameter of about 1,000,000 times thinner than a human’s,” Wang said.
While this first application creates an extremely smooth surface as is, the second spray infuses a thin layer of lubricant around those nanoscopic “hairs” to create a super-slippery surface.
“When we put that coating on a toilet in the lab and dump synthetic fecal matter on it, it (the synthetic fecal matter) just completely slides down and nothing sticks to it (the toilet),” Wang said.
With this novel slippery surface, the toilets can effectively clean residue from inside the bowl and dispose of the waste with only a fraction of the water previously needed. The researchers also predict the coating could last for about 500 flushes in a conventional toilet before a reapplication of the lubricant layer is needed.
While other liquid-infused slippery surfaces can take hours to cure, the LESS two-step coating takes less than five minutes. The researcher’s experiments also found the surface effectively repelled bacteria, particularly ones that spread infectious diseases and unpleasant odors.
If it were widely adopted in the United States, it could direct critical resources toward other important activities, to drought-stricken areas or to regions experiencing chronic water scarcity, said the researchers.
Driven by these humanitarian solutions, the researchers also hope their work can make an impact in the developing world. The technology could be used within waterless toilets, which are used extensively around the world.
“Poop sticking to the toilet is not only unpleasant to users, but it also presents serious health concerns,” Wong said.
However, if a waterless toilet or urinal used the LESS coating, the team predicts these types of fixtures would be more appealing and safer for widespread use.
To address these issues in both the United States and around the world, Wong and his collaborators, Wang, Birgitt Boschitsch, and Nan Sun, all mechanical engineering alumni, began a start-up venture.
With support from the Ben Franklin Technology Partners’ TechCelerator, the National Science Foundation, the Department of Energy, the Office of Naval Research, the Rice Business Plan Competition and Y-Combinator, their company, spotLESS Materials, is already bringing the LESS coating to market.
“Our goal is to bring impactful technology to the market so everyone can benefit,” Wong said. “To maximize the impact of our coating technology, we need to get it out of the lab.”
Looking forward, the team hopes spotLESS Materials will play a role in sustaining the world’s water resources and continue expanding the reach of their technology.
“As a researcher in an academic setting, my goal is to invent things that everyone can benefit from,” Wong said. “As a Penn Stater, I see this culture being amplified through entrepreneurship, and I’m excited to contribute.”
This paper is behind a paywall. However, the researchers have made a brief video available,
There you have it. One random thought, that toilet image reminded me of the controversy over Marcel Duchamp, the Fountain, and who actually submitted a urinal for consideration as a piece of art (Jan. 23, 2019 posting). Hint: Some believe it was Baroness Elsa von Freytag-Loringhoven.
There is a lot happening in the next day or two. I have two Vancouver (Canada) science events and an online event, which can be attended from anywhere.
Space debris on January 23, 2020 in Vancouver
I was surprised to learn about space debris (it was described as a floating junkyard in space) in 1992. It seems things have not gotten better. Here’s more from the Cosmic Nights: Space Debris event page on the H.R. MacMillan Space Centre website,
Cosmic Nights: Space Debris
There are tens of thousands of pieces of man-made debris, or “space junk,” orbiting the Earth that threaten satellites and other spacecraft. With the increase of space exploration and no debris removal processes in place that number is sure to increase.
Learn more about the impact space debris will have on current and future missions, space law, and the impact human activity, both scientific, and commercial are having on space as we discuss what it will take to make space exploration more sustainable. Physics professors Dr. Aaron Rosengren, and Dr. Aaron Boley will be joining us to share their expertise on the subject.
Tickets available for 7:30pm or 9:00pm planetarium star theatre shows. ________________
7:30 ticket holder schedule: 6:30 – check-in 7:00 – “Pooping in Space” (GroundStation Canada Theatre) 7:30 – 8:30 “Go Boldly and Sustainably” show (Planetarium Star Theatre) 9:00 – 9:30 “Space Debris” lecture
9:00 ticket holder schedule: 6:30 – check-in 7:00 – 9:00 (runs every 30 mins) “Pooping in Space” show (GroundStation Canada Theatre) 8:00 – 8:30 “Space Debris” lecture 9:00 – 10:00 “Go Boldly and Sustainably” show (Planetarium Star Theatre) The bar will be open from 6:30 – 10:00pm in the Cosmic Courtyard.
Only planetarium shows are ticketed, all other activities are optional.
7:00pm, 7:30pm, 8:00pm, 8:30pm – “Pooping in Space” – GroundStation Canada Theatre The ultimate waste! What happens when you have to “GO” in space? In this live show you’ll see how astronauts handle this on the ISS, look at some new innovations space suit design for future missions, and we’ll have some fun astronaut trivia.
7:30pm and 9:00pm – “Go Boldly and Sustainably” – Planetarium Star Theatre As humans venture into a solar system, where no one can own anything, it is becoming increasingly important to create policies to control for waste and promote sustainability. But who will enact these policies? Will it be our governments or private companies? Our astronomer Rachel Wang, and special guest Dr. Aaron Boley will explore these concepts under the dome in the Planetarium Star Theatre. For the 7:30 show SFU’s Paul Meyer will be making an appearance to talk about the key aspects of space security diplomacy and how it relates to the space debris challenge.
Dr. Aaron Boley is an Assistant Professor in the Physics and Astronomy department at UBC whose research program uses theory and observations to explore a wide range of processes in the formation of planets, from the birth of planet-forming discs to the long-term evolution of planetary systems.
Paul Meyer is Fellow in International Security and Adjunct Professor of International Studies at Simon Fraser University and a founding member of the Outer Space Institute. Prior to his assuming his current positions in 2011, Mr. Meyer had a 35-year career with the Canadian Foreign Service, including serving as Canada’s Ambassador to the United Nations and to the Conference on Disarmament in Geneva (2003-2007). He teaches a course on diplomacy at SFU’s School for International Studies and writes on issues of nuclear non-proliferation and disarmament, outer space security and international cyber security.
8:00pm and 9:00pm – “Space Junk: Our Quest to Conquer the Space Environment Problem” lecture by Dr. Aaron Rosengren
At the end of 2019, after nearly two decades, the U.S. government issued updated orbital debris mitigation guidelines, but the revision fell short of the sweeping changes many in the space debris research community expected. The updated guidelines sets new quantitative limits on events that can create debris and updates the classes of orbits to be used for the retirement of satellites, even allowing for the new exotic idea of passive disposal through gravitational resonances (similar phenomena have left their mark on the asteroid belt between Mars and Jupiter). The revised guidelines, however, do not make major changes, and leave intact the 25-year time frame for end-of-life disposal of low-Earth orbit satellites, a period many now believe to be far too long with the ever increasing orbital traffic in near-Earth space. In this talk, I will discuss various approaches to cleaning up or containing space junk, such as a recent exciting activity in Australia to use laser photo pressure to nudge inactive debris to safe orbits.
Dr. Aaron J. Rosengren is an Assistant Professor in the College of Engineering at the University of Arizona and Member of the Interdisciplinary Graduate Program in Applied Mathematics. Prior to joining UA in 2017, he spent one year at the Aristotle University of Thessaloniki in Greece working in the Department of Physics, as part of the European Union H2020 Project ReDSHIFT. He has also served as a member of the EU Asteroid and Space Debris Network, Stardust, working for two years at the Institute of Applied Physics Nello Carrara of the Italian National Research Council. His research interests include space situational awareness, orbital debris, celestial mechanics, and planetary science. Aaron is currently part of the Space Situational Awareness (SSA)-Arizona initiative at the University of Arizona, a member of the Outer Space Institute (OSI) for the sustainable development of Space at the University of British Columbia, and a research affiliate of the Center for Orbital Debris Education and Research (CODER) at the University of Maryland.
*Choose between either the 7:30pm or 9:00pm planetarium show when purchasing your ticket.*
This is a 19+ event. All attendees will be required to provide photo ID upon entry.
Date and Time
Thu, 23 January 2020 6:30 PM – 10:00 PM PST
H.R. MacMillan Space Centre 1100 Chestnut Street Vancouver, BC V6J 3J9
Cosmic Nights is the name for a series of talks about space and astronomy and an opportunity to socialize with your choice of beer or wine for purchase.
Canada-wide 2nd Canadian DIY Biology Summit (live audio and webcast)
This is a January 22, 2020 event accessible Canada-wide. For anyone on Pacific Time, it does mean being ready to check-in at 5 am. The first DIY Biology (‘do-it-yourself’ biology) Summit was held in 2016.
Organizers of Community Biolabs across Canada are converging on Ottawa this Wednesday for the second Canadian DIY Biology Summit organized by the Public Health Agency of Canada (PHAC). OSN [Open Science Network] President & Co-Founder, Scott Pownall, has been invited to talk about the Future of DIY/Community Biology in Canada.
A few points of clarification: DIYbio YVR has been renamed Open Science Network on Meetup and, should you wish to attend the summit virtually, there is information about passwords and codes on the agenda, which presumably will help you to get access.
Nerd Nite v. 49: Waterslides, Oil Tankers, and Predator-Prey Relationships on January 22, 2020 in Vancouver
When you were young, did you spend your summers zooming down waterslides? We remember days where our calves ached from climbing stairs, and sore bums from well… you know. And, if you were like us, you also stared at those slides and thought “How are these things made? And, is it going to disassemble while I’m on it?”. Today, we spend more of our summer days staring out at the oil tankers lining the shore, or watching seagulls dive down to retrieve waste left behind by tourists on Granville Island, but we maintain that curiousity about the things around us! So, splash into a New Year with us to learn about all three: waterslides, oil tankers, and predator-prey relationships.
Zachary is completing an MSc at UBC investigating freshwater and estuarine predation on juvenile salmon during their out-migration from natal rivers and works as a part-time contract biologist in the lower mainland. Prior to coming out west, Zach completed an interdisciplinary BSc in Aquatic Resources and Biology at St. F.X. University in Antigonish, N.S. During his undergraduate degree, Zach ran field and lab experiments to explore predator-induced phenotypic plasticity in intertidal blue mussels exposed to the waterborne cues of a drilling predator snail. He also conducted biological surveys on lobster fishing boats and worked as a fisheries observer for the offshore commercial snow crab fleet.
Shane is a professional mechanical engineer whose career transitioned from submarine designer to waterslide tester. He is currently a product manager for waterslides at WhiteWater West.
3. Oil Tankers 101
Kayla is an ocean enthusiast. She earned her Masters in Marine Management at Dalhousie University, studying compensation for environmental damage caused by ship-source oil spills. Passionate about sharing her knowledge of the ocean with others, Kayla’s shifted her focus to the realm of science communication to help more people foster a deeper relationship with science and the ocean. Kayla now works as a producer at The Story Collider, a non-profit dedicated to sharing true, personal stories about science, where she hosts live storytelling events and leads workshops on behalf of the organization. Follow her at @kaylamayglynn and catch her live on the Story Collider stage on February 11th, 2020!
An August 6, 2019 article by Adele Peters for Fast Company describes a ‘wooden’approach to water desalinization (also known as desalination),
“We are trying to develop a new type of membrane material that is nature-based,” says Z. Jason Ren, an engineering professor at Princeton University and one of the coauthors of a new paper in Science Advances about that material, which is made from wood. It’s designed for use in a process called membrane distillation, which heats up saltwater and uses pressure to force the water vapor through a membrane, leaving the salt behind and creating pure water. The membranes are usually made from a type of plastic. Using “nanowood” membranes instead can both improve the energy efficiency of the process and avoid the environmental problems of plastic.
A membrane made of a sliver of wood could be the answer to renewably sourced water cleaning. Most membranes that are currently used to distill fresh water from salty are made of polymers based on fossil fuels.
Inspired by the intricate system of water circulating in a tree, a research team from the University of Maryland, Princeton University, and the University of Colorado Boulder have figured out how to use a thin slice of wood as a membrane through which water vapor can evaporate, leaving behind salt or other contaminants.
The team chemically treated the wood to become hydrophobic, so that it more efficiently allows water vapor through, driven by a heat source like solar energy.
“This study discovered a new way of using wood materials’ unique properties as both an excellent insulator and water vapor transporter,” said Z. Jason Ren, a professor in environmental engineering who recently moved from CU Boulder to Princeton, and the other co-leader of the team that performed the study.
The researchers treat the wood so that it loses its lignin, the part of the wood that makes it brown and rigid, and its hemicellulose, which weaves in and out between cellulose to hold it in place. The resulting “nanowood” is treated with silane, a compound used to make silicon for computer chips. The semiconducting nature of the compound maintains the wood’s natural nanostructures of cellulose, and clings less to water vapor molecules as they pass through. Silane is also used in solar cell manufacturing.
The membrane looks like a thin piece of wood, seemingly bleached white, that is suspended above a source of water vapor. As the water heats and passes into the gas phase, the molecules are small enough to fit through the tiny channels lining the walls of the leftover cell structure. Water collected on the other side is now free of large contaminants like salt. To test it, the researchers distilled water through it and found that it performed 1.2 times better than a conventional membrane.
“The wood membrane has very high porosity, which promotes water vapor transport and prevents heat loss,” said first author Dianxun Hou, who was a student at CU Boulder. Inventwood, a UMD spinoff company of Hu’s research group, is working on commercializing wood based nanotechnologies.
The gold sheets in question are effectively 2D. I’m surprised they haven’t named them ‘goldene’ as everything else that’s 2D seems to have an ‘ene’ suffix (e.g. graphene, germanene, tellurene).
Of course, these gold sheets are not composed of single atoms but of two according to an August 6, 2019 news item on Nanowerk,
Scientists at the University of Leeds [UK] have created a new form of gold which is just two atoms thick – the thinnest unsupported gold ever created.
The researchers measured the thickness of the gold to be 0.47 nanometres – that is one million times thinner than a human finger nail. The material is regarded as 2D because it comprises just two layers of atoms sitting on top of one another. All atoms are surface atoms – there are no ‘bulk’ atoms hidden beneath the surface.
I’m pretty sure they’ve added colour to those images and not just in the background; they’ve likely added a gold colour to the gold.
The material could have wide-scale applications in the medical device and electronics industries – and also as a catalyst to speed up chemical reactions in a range of industrial processes.
Laboratory tests show that the ultra-thin gold is 10 times more efficient as a catalytic substrate than the currently used gold nanoparticles, which are 3D materials with the majority of atoms residing in the bulk rather than at the surface.
Scientists believe the new material could also form the basis of artificial enzymes that could be applied in rapid, point-of-care medical diagnostic tests and in water purification systems.
The announcement that the ultra-thin metal had been successfully synthesised was made in the journal Advanced Science.
The lead author of the paper, Dr Sunjie Ye, from Leeds’ Molecular and Nanoscale Physics Group and the Leeds Institute of Medical Research, said: “This work amounts to a landmark achievement.
“Not only does it open up the possibility that gold can be used more efficiently in existing technologies, it is providing a route which would allow material scientists to develop other 2D metals.
“This method could innovate nanomaterial manufacturing.”
The research team are looking to work with industry on ways of scaling-up the process.
Synthesising the gold nanosheet takes place in an aqueous solution and starts with chloroauric acid, an inorganic substance that contains gold. It is reduced to its metallic form in the presence of a ‘confinement agent’ – a chemical that encourages the gold to form as a sheet, just two atoms thick.
Because of the gold’s nanoscale dimensions, it appears green in water – and given its shape, the researchers describe it as gold nanoseaweed.
Professor Stephen Evans, head of the Leeds’ Molecular and Nanoscale Research Group who supervised the research, said the considerable gains that could be achieved from using these ultra-thin gold sheets are down to their high surface-area to volume ratio.
He said: “Gold is a highly effective catalyst. Because the nanosheets are so thin, just about every gold atom plays a part in the catalysis. It means the process is highly efficient.”
Standard benchmark tests revealed that gold nanoscale sheets were ten times more efficient than the gold nanoparticles conventionally used in industry.
Professor Evans said: “Our data suggests that industry could get the same effect from using a smaller amount of gold, and this has economic advantages when you are talking about a precious metal.”
Similar benchmark tests revealed that the gold sheets could act as highly effective artificial enzymes.
The flakes are also flexible, meaning they could form the basis of electronic components for bendable screens, electronic inks and transparent conducting displays.
Professor Evans thinks there will inevitably be comparisons made between the 2D gold and the very first 2D material ever created – graphene, which was fabricated at the University of Manchester in 2004.
He said: “The translation of any new material into working products can take a long time and you can’t force it to do everything you might like to. With graphene, people have thought that it could be good for electronics or for transparent coatings – or as carbon nanotubes that could make an elevator to take us into space because of its super strength.
“I think with 2D gold we have got some very definite ideas about where it could be used, particularly in catalytic reactions and enzymatic reactions. We know it will be more effective than existing technologies – so we have something that we believe people will be interested in developing with us.”
Here’s a link to and a citation for the paper,
Sub‐Nanometer Thick Gold Nanosheets as Highly Efficient Catalysts by Sunjie Ye, Andy P. Brown, Ashley C. Stammers, Neil H. Thomson, Jin Wen, Lucien Roach, Richard J. Bushby, Patricia Louise Coletta, Kevin Critchley, Simon D. Connell, Alexander F. Markham, Rik Brydson, Stephen D. Evans. Advnaced Science https://doi.org/10.1002/advs.201900911 First published: 06 August 2019
Scientists at Northwestern University (Chicago, Illinois) and the California Institute of Technology (CalTech) have developed what could be a more sustainable way to produce electricity. From a July 31, 2019 news item on Nanowerk,
Scientists from Northwestern University and Caltech have produced electricity by simply flowing water over extremely thin layers of inexpensive metals, including iron, that have oxidized. These films represent an entirely new way of generating electricity and could be used to develop new forms of sustainable power production.
The films have a conducting metal nanolayer (10 to 20 nanometers thick) that is insulated with an oxide layer (2 nanometers thick). Current is generated when pulses of rainwater and ocean water alternate and move across the nanolayers. The difference in salinity drags the electrons along in the metal below.
“It’s the oxide layer over the nanometal that really makes this device go,” said Franz M. Geiger, the Dow Professor of Chemistry in Northwestern’s Weinberg College of Arts and Sciences. “Instead of corrosion, the presence of the oxides on the right metals leads to a mechanism that shuttles electrons.”
The films are transparent, a feature that could be taken advantage of in solar cells. The researchers intend to study the method using other ionic liquids, including blood. Developments in this area could lead to use in stents and other implantable devices.
“The ease of scaling up the metal nanolayer to large areas and the ease with which plastics can be coated gets us to three-dimensional structures where large volumes of liquids can be used,” Geiger said. “Foldable designs that fit, for instance, into a backpack are a possibility as well. Given how transparent the films are, it’s exciting to think about coupling the metal nanolayers to a solar cell or coating the outside of building windows with metal nanolayers to obtain energy when it rains.”
The study, titled “Energy Conversion via Metal Nanolayers,” was published this week [on July 29, 2019] in the journal Proceedings of the National Academy of Sciences (PNAS).
Geiger is the study’s corresponding author; his Northwestern team conducted the experiments. Co-author Thomas Miller, professor of chemistry at Caltech, led a team that conducted atomistic simulations to study the device’s behavior at the atomic level.
The new method produces voltages and currents comparable to graphene-based devices reported to have efficiencies of around 30% — similar to other approaches under investigation (carbon nanotubes and graphene) but with a single-step fabrication from earth-abundant elements instead of multistep fabrication. This simplicity allows for scalability, rapid implementation and low cost. Northwestern has filed for a provisional patent.
Of the metals studied, the researchers found that iron, nickel and vanadium worked best. They tested a pure rust sample as a control experiment; it did not produce a current.
The mechanism behind the electricity generation is complex, involving ion adsorption and desorption, but it essentially works like this: The ions present in the rainwater/saltwater attract electrons in the metal beneath the oxide layer; as the water flows, so do those ions, and through that attractive force, they drag the electrons in the metal along with them, generating an electrical current.
“There are interesting prospects for a variety of energy and sustainability applications, but the real value is the new mechanism of oxide-metal electron transfer,” Geiger said. “The underlying mechanism appears to involve various oxidation states.”
The team used a process called physical vapor deposition (PVD), which turns normally solid materials into a vapor that condenses on a desired surface. PVD allowed them to deposit onto glass metal layers only 10 to 20 nanometers thick. An oxide layer then forms spontaneously in air. It grows to a thickness of 2 nanometers and then stops growing.
“Thicker films of metal don’t succeed — it’s a nano-confinement effect,” Geiger said. “We have discovered the sweet spot.”
When tested, the devices generated several tens of millivolts and several microamps per centimeter squared.
“For perspective, plates having an area of 10 square meters each would generate a few kilowatts per hour — enough for a standard U.S. home,” Miller said. “Of course, less demanding applications, including low-power devices in remote locations, are more promising in the near term.”
Here’s a link to and a citation for the paper,
Energy conversion via metal nanolayers by Mavis D. Boamah, Emilie H. Lozier, Jeongmin Kim, Paul E. Ohno, Catherine E. Walker, Thomas F. Miller III, and Franz M. Geiger. PNAS DOI: https://doi.org/10.1073/pnas.1906601116 First published July 29, 2019