It looks like a pair of lips to me but, according to a December 12, 2018 news item on Nanowerk, this liver fluke heralds a flatworm infection is a serious health problem,
An international team, led by Professor Francisco Goycoolea from the University of Leeds [UK] and Dr Claudio Salomon from the Universidad Nacional de Rosario, Argentina, and in collaboration with colleagues at the University of Münster, Germany, have developed a novel pharmaceutical formulation to administer triclabendazole – an anti-parasitic drug used to treat a type of flatworm infection – in billions of tiny capsules.
The World Health Organisation estimates that 2.4 million people are infected with fascioliasis, the disease caused by flatworms and treated with triclabendazole.
Anti-parasitic drugs do not become effective until they dissolve and are absorbed. Traditionally, these medicines are highly insoluble and this limits their therapeutic effect. In a bid to overcome this limitation and accomplish the new formulation, the team used “soft” nanotechnology and nanomedicine approaches, which utilises the self-assembly properties of organic nanostructures and uses techniques in which components, such as polymers and surfactants in solution, play key roles.
Their formulation produces capsules that are less than one micron in size – the diameter of a human hair is roughly 75 microns. These tiny capsules are loaded with triclabendazole and then bundled together to deliver the required dose.
The team used chitosan, a naturally-occurring sugar polymer found in the exoskeleton of shellfish and the cell walls of certain fungi, to coat the oil-core of capsules and bind the drug together, while stabilising the capsule and helping to preserve it. In its nanocapsule form, the drug would be 100 times more soluble than its current tablet form.
Professor Goycoolea, from the School of Food Science and Nutrition at Leeds, said: “Solubility is critical challenge for effective anti-parasite medicine. We looked to tackle this problem at the particle level. Triclabendazole taken as a dose made up of billions of tiny capsules would mean the medicine would be more efficiently and quickly absorbed
“Through the use of nanocapsules and nanoemulsions, drug efficiency can be enhanced and new solutions can be considered for the best ways to target medicine delivery.” Dr Salomon said: “To date, this is the first report on triclabendazole nanoencapsulation and we believe this type of formulation could be applied to other anti-parasitic drugs as well. But more research is needed to ensure this new pharmaceutical formulation of the drug does not diminish the anti-parasitic effect. Our ongoing research is working to answer this very question.”
Although there have been cases of fascioliasis in more than 70 countries worldwide, with increasing reports from Europe and the Americas, it is considered a neglected disease, as it does not receive much attention and often goes untreated. Symptoms of the disease when it reaches the chronic phase include intermittent pain, jaundice and anaemia. Patients can also experience hardening of the liver in the case of long-term inflammation.
Because of the highly insoluble nature of anti-parasitic drugs, they need to be administered in very high dosages to ensure enough of the active ingredient is absorbed. This is particularly problematic when treating children for parasites. Tablets needs to be divided into smaller pieces to adjust the dosage and make swallowing easier, but this can cause side effects due to incorrect dosage.
The team’s technique to formulate triclabendazole into nanocapsules, published today [Dec. 12, 2018] in the journal PLOS ONE, would also allow for lower doses to be administered. s
This paper is open access. BTW, I loved the title for the press release (Helping the anti-parasitic medicine go down) for its reference to the song, A spoonful of sugar helps the medicine go down, in the 1964 film musical, Mary Poppins, and the shout out for the sort of sequel, Mary Poppins Returns, released on Dec. 19, 2018.
Caption: An orb spider, glue-maker extraordinaire, at work on a web. Credit: The University of Akron
Scientists are taking inspiration from spiders in their quest to develop better adhesives. (Are they abandoning the gecko? Usually when scientists study adhesiveness, there’s talk of geckos. From a June 5, 2018 news item on ScienceDaily,
Ever wonder why paint peels off the wall during summer’s high humidity? It’s the same reason that bandages separate from skin when we bathe or swim.
Interfacial water, as it’s known, forms a slippery and non-adhesive layer between the glue and the surface to which it is meant to stick, interfering with the formation of adhesive bonds between the two.
Overcoming the effects of interfacial water is one of the challenges facing developers of commercial adhesives.
To find a solution, researchers at The University of Akron (UA) are looking to one of the strongest materials found in nature: spider silk.
The sticky glue that coats the silk threads of spider webs is a hydrogel, meaning it is full of water. One would think, then, that spiders would have difficulty catching prey, especially in humid conditions — but they do not. In fact, their sticky glue, which has been a subject of intensive research for years, is one of the most effective biological glues in all of nature.
So how is spider glue able to stick in highly humid conditions?
That question was the subject of investigation by UA graduate students Saranshu Singla, Gaurav Amarpuri and Nishad Dhopatkar, who have been working with Dr. Ali Dhinojwala, interim dean of the College of Polymer Science and Polymer Engineering, and Dr. Todd Blackledge, professor of biology in the Integrated Bioscience program. Both professors are principal investigators in UA’s Biomimicry Research Innovation Center [BRIC], which specializes in emulating biological forms, processes, patterns and systems to solve technical challenges.
The team’s findings, which may provide the clue to developing stronger commercial adhesives, can be read in a paper recently published in the journal Nature Communications.
Singla and her colleagues set out to examine the secret behind the success of the common orb spider (Larinioides cornutus) glue and uncover how it overcomes the primary obstacle of achieving good adhesion in the humid conditions where water could be present between the glue and the target surface.
To investigate the processes involved, the team took orb spider glue, set it on sapphire substrate, then examined it using a combination of interface-sensitive spectroscopy and infrared spectroscopy.
Spider glue is made of three elements: two specialized glycoproteins, a collection of low molecular mass organic and inorganic compounds (LMMCs), and water. The LMMCs are hygroscopic (water-attracting), which keeps the glue soft and tacky to stick.
Singla and her team discovered that these glycoproteins act as primary binding agents to the surface. Glycoprotein-based glues have been identified in several other biological glues, such as fungi, algae, diatoms, sea stars, sticklebacks and English ivy.
But why doesn’t the water present in the spider glue interfere with the adhesive contact the way it does with most synthetic adhesives?
The LMMCs, the team concluded, perform a previously unknown function of sequestering interfacial water, preventing adhesive failure.
Singla and colleagues determined that it is the interaction of glycoproteins and LMMCs that governs the adhesive quality of the glue produced, with the respective proportions varying across species, thus optimizing adhesive strength to match the relative humidity of spider habitat.
“The hygroscopic compounds – known as water-absorbers – in spider glue play a previously unknown role in moving water away from the boundary, thereby preventing failure of spider glue at high humidity,” explained Singla.
The ability of the spider glue to overcome the problem of interfacial water by effectively absorbing it is the key finding of the research, and the one with perhaps the strongest prospect for commercial development.
“Imagine a paint that is guaranteed for life, come rain or shine,” Singla remarked.
All thanks to your friendly neighborhood spider glue.
Compared to five or more years ago, there’s a lollapalooza of art/sci (or sciart) events coming up in September 2018. Of course, it’s helpful if you live in or are visiting Toronto or Vancouver or Calgary at the right time. All of these events occur from mid September (roughly) to the end of September. In no particular date order:
“The Sense of Beauty: Art and Science at CERN” (2017) by Valerio Jalongo
TUESDAY, SEPTEMBER 25, 2018 at 6:30 pm
The CINEMATHEQUE – 1131 Howe Street, Vancouver
Duration of film: 75’. Director in attendance; Q&A with the film director to follow the screening
Director Jalongo will discuss the making of his documentary in a seminar open to the public on September 24 (1:00-2:30 pm) at UBC [University of British Columbia] (Buchanan Penthouse, *1866 Main Maill, Block C, 5th floor*, Vancouver).
The Sense of Beauty is the story of an unprecedented experiment that involves scientists from throughout the world collaborating around the largest machine ever constructed by human beings: the LHC (Large Hadron Collider). As the new experiment at CERN proceeds in its exploration of the mysterious energy that animates the universe, scientists and artists guide us towards the shadow line where science and art, in different ways, pursue truth and beauty.
Some of these men and women believe in God, while others believe only in experiment and doubt. But in their search for truth they are all alert to an elusive sixth – or seventh – sense: the sense of beauty. An unmissable opportunity for lovers of science, of beauty, or of both.
Rome-born Valerio Jalongo is a teacher, screenwriter and director who works in cinema and TV, for which he created works of fiction and award-winning documentaries. Among them: Sulla mia pelle (On My Skin, 2003) and La scuola è finita (2010), starring Valeria Golino, on the difficulties facing public schools in Italy.
This event is presented by the Dante Alighieri Society of BC in collaboration with the Consulate General of Italy in Vancouver and in association with ARPICO (www.arpico.ca), the Society of Italian Researchers and Professionals in Western Canada.
I searched for more information both about the film and about the seminar at UBC. I had no luck with the UBC seminar but I did find more about the film. There’s an April (?) 2017 synopsis by Luciano Barisone on the Vision du Réel website,
From one cave to another. In prehistoric times, human beings would leave paintings in caves to show their amazement and admiration for the complexity of the world. These reproductions of natural forms were the results of an act of creation and also of mystical gestures which appropriated the soul of things. In another gigantic and modern den, the immense CERN laboratory, the same thing is happening today, a combination of enthralled exploration of the cosmos and an attempt to control it. Valerio Jalongo’s film tackles the big questions that have fascinated poets, artists and philosophers since the dawn of time. Who are we? Where do we come from? Where are we going? The scientists at CERN attempt to answer them through machines that explore matter and search for the origins of life. In their conversations or their words to camera, the meaning of existence thus seems to become a pure question of the laws of physics and mathematical formulae. If only for solving the mystery of the universe a sixth sense is necessary. That of beauty…
There’s also a February 5, 2018 essay by Stefano Caggiano for Interni, which uses a description of the film to launch into a paean to Italian design,
The success of the documentary The Sense of Beauty by Valerio Jalongo, which narrates the ‘aesthetic’ side of the physicists at CERN when faced with the fundamental laws of nature, proves that the yearning for beauty is not just an aspect of art, but something shared by all human efforts to interpret reality.
It is no coincidence that the scientists themselves define the LHC particle accelerator (27 km) as a grand machine for beauty, conceived to investigate the meaning of things, not to perform some practical function. In fact, just as matter can be perceived only through form, and form only if supported by matter (Aristotle already understood this), so the laws of physics can be glimpsed only when they are applied to reality.
This is why in the Large Hadron Collider particles are accelerated to speeds close to that of light, reconstructing the matter-energy conditions just a few instants after the Big Bang. Only in this way is it possible to glimpse the hidden fundamental laws of the universe. It is precisely this evanescence that constitutes ‘beauty.’
The quivering of the form that reveals itself in the matter that conceals it, and which – given the fact that everything originates in the Big Bang – is found everywhere, in the most faraway stars and the closest objects: you just have to know how to prove it, grasp it, how to wait. Because this is the only way to establish relations with beauty: not perceiving it but awaiting it. Respecting its way of offering itself, which consists in denying itself.
Charging the form of an object with this sensation of awaiting, then, means catalyzing the ultimate and primary sense of beauty. And it is what is held in common by the work of the five Italian designers nominated for the Rising Talent Awards of Maison & Object 2018 (with Kensaku Oshiro as the only non-Italian designer, though he does live and work in Milan).
There’s a trailer (published by CERN on November 7, 2017,
It’s in both Italian and English with subtitles throughout, should you need them.
*The address for the Buchanan Penthouse was corrected from: 2329 West Mall to 1866 Main Maill, Block C, 5th floor on Sept. 17, 2018.
Toronto’s ArtSci Salon at Nuit Blanche, Mycology, Wild Bees and Art+Tech!
From a Tuesday, September 11, 2018 Art/Sci Salon announcement (received via email),
Baba Yaga Collective and ArtSci Salon Present: Chaos Fungorum
In 1747, Carl Linnaeus, known as the “father of taxonomy”, observed
that the seeds of fungus moved in water like fish until “..by a law of
nature thus far unheard of and surpassing all human understanding..,”
they changed back to plant in their adult life.
He proceeded to include fungi in the new genus of “Chaos”. But why
delimiting fungi within categories and boundaries when it is exactly
their fluidity that make them so interesting?
Chaos Fungorum draws on the particular position occupied by fungi and
other hybrid organisms: neither plant nor animal, fungi extend across,
and can entertain, communications and collaborations between animal,
human and industrial realms.
Mixing different artistic practices and media, the artists featured in
this exhibition seek to move beyond rigid comprehensions of the living
by working with, rather than merely shaping, sculpting and manipulating
plants, microorganisms and fungi. Letting the non-human speak is to move
away from an anthropocentric approach to the world: it not only opens to
new rewarding artistic practices, but it also fosters new ideas of
sustainable coexistence, new unusual life collaborations and
adaptations, and new forms of communications and languages.
September 26 – October 7, 2018
Baba Yaga Collective 906 Queen Street West @Crawford, Toronto
All the Buzz on Wild Bee Club!
Summer Speaker Series
Wed Sept 19 at 7pm
High Park Nature Centre,
All the Buzz on Wild Bee Club! – Summer Speaker Series
The speaker series will feature the club’s biologist/leader SUSAN FRYE.
A major component of this club will use the SONIC SOLITARIES AUDIO BEE
CABINET – an observable nest site for bees in OURSpace – to encompass a
sensory experience with stem nesting bees and wasps, and to record
weekly activity at the cabinet. Pairing magnified views in tandem with
amplified sound via headphones, the cabinet facilitates an enhanced
perception of its tiny inhabitants: solitary bees and wasps and other
nest biota in action, up close. As citizen scientists, we can gather and
record observations to compile them into a database that will contribute
to our growing understanding of native bees, the native (and non-native)
plants they use for food and nest material sources, their co-evolution,
and how pollination in a park and restored habitat setting is
facilitated by native bees.
Fri, Sept 21, 8pm
Music Gallery, 918 Bathurst (their new location) – Trio Wow & Flutter
with Bea Labikova, fujara, saxophones,
Kayla Milmine-Abbott, soprano saxophone,
Sarah Peebles, shō, cracklebox, amplifiers.
Call for Participants: Art+Tech Jam
ChangeUp’s Art+Tech Jam
This three days event will unite a diverse group of artists and
technologists in an intensive, collaborative three-day creation period
and culminating showcase (public exhibition and interdisciplinary rave).
ChangeUo is currently accepting applicants from tech and arts/culture
spaces of all ages, backgrounds, and experience levels.
Limited spots available.
For more information and to apply https://tinyurl.com/changeup-artsorg
I looked up Nanotopia and found it on SoundCloud. Happy listening!
Et Al III (the ultimate science bar night in Vancouver) and more
A September 12, 2018 Curiosity Collider announcement (received via email) reveals details about the latest cooperative event/bar night put on by three sciencish groups,
Curiosity Collider is bringing art + science to Vancouver’s Ultimate Bar Science Night with Nerd Nite & Science Slam
Do you enjoy learning about science in a casual environment? This is the third year that Curiosity Collider is part of Et al, the Ultimate Bar Science Night where we bring together awesome speakers and activities. Come and enjoy Curiosity Collider’s segment on quantum physics with Spoken Word Poet Angelica Poversky, Physicist James Day, and CC’s own Creative Director Char Hoyt.
When: Drinks and mingling start at 6:30pm. Presentations start at 7:30pm. Where:Rio Theatre, 1660 E Broadway, Vancouver, BC V5N 1W1 Cost:$15-20 via Eventbrite and at the door. Proceeds will be used to cover the cost of running this event, and to fund future science bar events.
Special Guest talk by Dr. Carin Bondar – Biologist with a Twist!
Dr. Carin Bondar is a biologist, author and philosopher. Bondar is author of the books Wild Sex and Wild Moms (Pegasus). She is the writer and host of an online series based on her books which have garnered over 100,000,000 views. Her TED talk on the subject has nearly 3 million views. She is host of several TV series including Worlds Oddest Animal Couples (Animal Planet, Netflix), Stephen Hawking’s Brave New World (Discovery World HD, National Geographic) and Outrageous Acts of Science (The Science Channel). Bondar is an adventurer and explorer, having discovered 11 new species of beetles and snails in the remote jungles of Borneo. Bondar is also a mom of 4 kids, two boys and two girls.
Vancouver Biennale is hosting Patricia Piccinini’s CURIOUS IMAGININGS at the Patricia Hotel. The exhibition will “challenge us to explore the social impacts of emerging biotechnology and our ethical limits in an age where genetic engineering and digital technologies are already pushing the boundaries of humanity.” Purchase tickets online.
Devoted readers 🙂 will note that the Vancouver Biennale’s Curious Imaginings show was featured here in a June 18, 2018 post and mentioned more recently in the context of a September 11, 2018 post on xenotransplantation.
Et Al III: The Ultimate Bar Science Night Curiosity Collider + Nerd Nite Vancouver + Science Slam Canada
POSTER BY: Armin Mortazavi IG:@Armin.Scientoonist
Et Al III: The Ultimate Bar Science Night
Curiosity Collider + Nerd Nite Vancouver + Science Slam Canada
Special Guest talk by Dr. Carin Bondar – Biologist with a Twist!
6:30pm – Doors open
6:30-7:30 Drinks, Socializing, Nerding
7:30pm-945pm Stage Show with two intermissions
You like science? You like drinking while sciencing? In Vancouver there are many options to get educated and inspired through science, art, and culture in a casual bar setting outside of universities. There’s Nerd Nite which focuses on nerdy lectures in the Fox Cabaret, Curiosity Collider which creates events that bring together artists and scientists, and Science Slam, a poetry-slam inspired science communication competition!
In this third installment of Et Al, we’re making the show bigger than ever. We want people to know all about the bar science nights in Vancouver, but we also want to connect all you nerds together as we build this community. We encourage you to COME DRESSED AS YOUR FAVOURITE SCIENTIST. We will give away prizes to the best costumes, plus it’s a great ice breaker. We’re also encouraging science based organizations to get involved in the show by promoting your institution. Contact Kaylee or Michael at email@example.com if your science organization would like to contribute to the show with some giveaways, you will get a free ticket, if you don’t have anything to give away, contact us anyway, we want this to be a celebration of science nights in Vancouver!
Dr. Carin Bondar is a biologist, author and philosopher. Bondar is author of the books Wild Sex and Wild Moms (Pegasus). She is writer and host of online series based on her books (Wild Sex and Wild Moms) which have garnered over 100,000,000 views. Her TED talk on the subject has nearly 3 million views. She is host of several TV series including Worlds Oddest Animal Couples (Animal Planet, Netflix), Stephen Hawking’s Brave New World (Discovery World HD, National Geographic) and Outrageous Acts of Science (The Science Channel). Bondar is an adventurer and explorer, having discovered 11 new species of beetles and snails in the remote jungles of Borneo. Bondar is also a mom of 4 kids, two boys and two girls.
Curiosity Collider Art Science Foundation promotes interdisciplinary collaborations that capture natural human curiosity. At the intersection of art, culture, technology, and humanity are innovative ways to communicate the daily relevance of science. Though exhibitions, performance events and our quarterly speaker event, the Collider Cafe we help create new ways to experience science.
In our opinion, there has never been a better time to be a Nerd! Nerd Nite is an event which is currently held in over 60 cities worldwide! The formula for each Nerd Nite is pretty standard – 20 minute presentations from three presenters each night, in a laid-back environment with lots to learn, and lots to drink!
Science Slam YVR is a community outreach organization committed to supporting and promoting science communication in Vancouver. Our Science Slams are informal competitions that bring together researchers, students, educators, and communicators to share interesting science in creative ways. Every event is different, with talks, poems, songs, dances, and unexpected surprises. Our only two rules? Each slammer has 5 minutes, and no slideshows are allowed! Slammers come to share their science, and the judges and audience decide their fate. Who will take away the title of Science Slam champion?
An art, science, and engineering festival in Calgary, Alberta, Beakerhead opens on September 19, 2018 and runs until September 23, 2018. Here’s more from the 2018 online programme announcement made in late July (?) 2018,
Giant Dung Beetle, Zorb Ball Racers, Heart Powered Art and More Set to Explode on Calgary Streets!
Quirky, fun adventures result when art, science and engineering collide at Beakerhead September 19 – 23, 2018.
In just seven weeks, enormous electric bolts will light up the sky in downtown Calgary when a crazy cacophony of exhibits and events takes over the city. The Beakerhead crew is announcing the official program lineup with tickets now available online for all ticketed events. This year’s extravaganza will include remarkable spectacles of art and science, unique activities, and more than 50 distinct events – many of which are free, but still require registration to get tickets.
The Calgary-born smash up of art, science and engineering is in its sixth year. Last year, more than 145,000 people participated in Beakerhead and organizers are planning to top that number in 2018.
“Expect conversations that start with “wow!” says Mary Anne Moser, President and Co-founder of Beakerhead. “This year’s lineup includes a lot of original concepts, special culinary events, dozens of workshops, shows and and tours.”
Beakerhead events take place indoors and out. Beakernight is science’s biggest ticketed street party and tickets are now on sale.
Highlights of Beakerhead 2018:
Light up the Night: Giant electric bolts will light up the night sky thanks to two 10-metre Tesla Coils built by a team of artists and engineers.
Lunch Without Light: This special Dark Table dining experience is led by a famous broadcaster and an esteemed neuroscientist.
Beakereats and Beakerbar: Dining is a whole new experience when chef and bartender become scientist! Creative Calgary chefs and mixologists experiment with a new theme in 2018: canola.
Four to Six on Fourth: Blocks of open-air experimentation including a human-sized hamster wheel, artists, performers, and hands-on or feet-on experiences like walking on liquid.
Beacons: This series of free neighbourhood installations is completely wild! There’s everything from a giant dung beetle to a 3.5 metre lotus that lights up with your heart beat.
Workshops: Learn the art of animation, understand cryptocurrency, meet famous scientists and broadcasters, make organic facial oil or a vegan carrot cake and much more.
Zorbathon: Get inside a zorb and cavort with family and friends in an oversized playground. Participate in rolling races, bump-a-thons, obstacle courses. Make a day of it.
Beakerhead takes place September 19 – 23, 2018 with the ticketed Beakernight on Saturday, September 22 at Fort Calgary.
Here’s a special shout out to Shaskatchewan`s Jean-Sébastien Gauthier and Brian F. Eames (featured here in a February 16, 2018 posting) and their free ‘Within Measure’ Sept. 19 – 23, 2018 event at Beakerhead.
The organic pollution decomposing properties of titanium dioxide (TiO2 ) have been known for about half a century. However, practical applications have been few and hard to develop, but now a Greek paint producer claims to have found a solution
The photocatalytic properties of anatase, one of the three naturally occurring forms of titanium dioxide, were discovered in Japan in the late 1960s. Under the influence of the UV-radiation in sunlight, it can decompose organic pollutants such as bacteria, fungi and nicotine, and some inorganic materials into carbon dioxide. The catalytic effect is caused by the nanostructure of its crystals.
Applied outdoors, this affordable and widely available material could represent an efficient self-cleaning solution for buildings. This is due to the chemical reaction, which leaves a residue on building façades, a residue then washed away when it rains. Applying it to monuments in urban areas may save our cultural heritage, which is threatened by pollutants.
However, “photocatalytic paints and additives have long been a challenge for the coating industry, because the catalytic action affects the durability of resin binders and oxidizes the paint components,” explains Ioannis Arabatzis, founder and managing director of NanoPhos, based in the Greek town of Lavrio, in one of the countries home to some of the most important monuments of human history. The Greek company is testing a paint called Kirei, inspired by a Japanese word meaning both clean and beautiful.
According to Arabatzis, it’s an innovative product because it combines the self-cleaning action of photocatalytic nanoparticles and the reflective properties of cool wall paints. “When applied on exterior surfaces this paint can reﬂect more than 94% of the incident InfraRed radiation (IR), saving energy and reducing costs for heating and cooling”, he says. “The reﬂection values are enhanced by the self-cleaning ability. Compared to conventional paints, they remain unchanged for longer.”
The development of Kirei has been included in the European project BRESAER (BREakthrough Solutions for Adaptable Envelopes in building Refurbishment) which is studying a sustainable and adaptable “envelope system” to renovate buildings. The new paint was tested and subjected to quality controls following ISO standard procedures at the company’s own facilities and in other independent laboratories. “The lab results from testing in artificial, accelerated weathering conditions are reliable,” Arabatzis claims. “There was no sign of discolouration, chalking, cracking or any other paint defect during 2,000 hours of exposure to the simulated environmental conditions. We expect the coating’s service lifetime to be at least ten years.”
Many studies are being conducted to exploit the properties of titanium dioxide. Jan Duyzer, researcher at the Netherlands Organisation for Applied Scientific Research (TNO) in Utrecht, focused on depollution: “There is no doubt about the ability of anatase to decrease the levels of nitrogen oxides in the air. But in real situations, there are many differences in pollution, wind, light, and temperature. We were commissioned by the Dutch government specifically to find a way to take nitrogen oxides out of the air on roads and in traffic tunnels. We used anatase coated panels. Our results were disappointing, so the government decided to discontinue the research. Furthermore, we still don’t know what caused the difference between lab and life. Our best current hypothesis is that the total surface of the coated panels is very small compared to the large volumes of polluted air passing over them,” he tells youris.com.
Experimental deployment of titanium dioxide panels on an acoustic wall along a Dutch highway – Courtesy of Netherlands Organisation for Applied Scientific Research (TNO)
“In laboratory conditions the air is blown over the photocatalytic surface with a certain degree of turbulence. This results in the NOx-particles and the photocatalytic material coming into full contact with one another,” says engineer Anne Beeldens, visiting professor at KU Leuven, Belgium. Her experience with photocatalytic TiO2 is also limited to nitrogen dioxide (NOx) pollution.
“In real applications, the air stream at the contact surface becomes laminar. This results in a lower velocity of the air at the surface and a lower depollution rate. Additionally, not all the air will be in contact with the photocatalytic surfaces. To ensure a good working application, the photocatalytic material needs to be positioned so that all the air is in contact with the surface and flows over it in a turbulent manner. This would allow as much of the NOx as possible to be in contact with photocatalytic material. In view of this, a good working application could lead to a reduction of 5 to 10 percent of NOx in the air, which is significant compared to other measures to reduce pollutants.”
The depollution capacity of TiO2 is undisputed, but most applications and tests have only involved specific kinds of substances. More research and measurements are required if we are to benefit more from the precious features of this material.
I think the most recent piece here on protecting buildings, i.e., the historic type, from pollution is an Oct. 21, 2014 posting: Heart of stone.
July 28, 2016 was the 150th anniversary of Beatrix Potter‘s birthday. Known by many through her children’s books, she has left an indelible mark on many of us. Hop-skip-jump.com has a description of an extraordinary woman, from their Beatrix Potter 150 years page,
An artist, storyteller, botanist, environmentalist, farmer and impeccable businesswoman, Potter was a visionary and a trailblazer. Single-mindedly determined and ambitious she overcame professional rejection, academic humiliation, and personal heartbreak, going on to earn her fortune and a formidable reputation.
A July 27, 2016 posting by Alex Jackson on the Guardian science blogs provides more information about Potter’s science (Note: Links have been removed),
Influenced by family holidays in Scotland, Potter was fascinated by the natural world from a young age. Encouraged to follow her interests, she explored the outdoors with sketchbook and camera, honing her skills as an artist, by drawing and sketching her school room pets: mice, rabbits and hedgehogs. Led first by her imagination, she developed a broad interest in the natural sciences: particularly archaeology, entomology and mycology, producing accurate watercolour drawings of unusual fossils, fungi, and archaeological artefacts.
Potter’s uncle, Sir Henry Enfield Roscoe FRS, an eminent nineteenth-century chemist, recognised her artistic talent and encouraged her scientific interests. By the 1890s, Potter’s skills in mycology drew Roscoe’s attention when he learned she had successfully germinated spores of a class of fungi, and had ideas on how they reproduced. He used his scientific connections with botanists at Kew’s Royal Botanic Gardens to gain a student card for his niece and to introduce her to Kew botanists interested in mycology.
Although Potter had good reason to think that her success might break some new ground, the botanists at Kew were sceptical. One Kew scientist, George Massee, however, was sufficiently interested in Potter’s drawings, encouraging her to continue experimenting. Although the director of Kew, William Thistleton-Dyer refused to give Potter’s theories or her drawings much attention both because she was an amateur and a female, Roscoe encouraged his niece to write up her investigations and offer her drawings in a paper to the Linnean Society.
In 1897, Potter put forward her paper, which Massee presented to the Linnean Society, since women could not be members or attend a meeting. Her paper, On the Germination of the Spores of the Agaricineae, was not given much notice and she quickly withdrew it, recognising that her samples were likely contaminated. Sadly, her paper has since been lost, so we can only speculate on what Potter actually concluded.
Until quite recently, Potter’s accomplishments and her experiments in natural science went unrecognised. Upon her death in 1943, Potter left hundreds of her mycological drawings and paintings to the Armitt Museum and Library in Ambleside, where she and her husband had been active members. Today, they are valued not only for their beauty and precision, but also for the assistance they provide modern mycologists in identifying a variety of fungi.
In 1997, the Linnean Society issued a posthumous apology to Potter, noting the sexism displayed in the handling of her research and its policy toward the contributions of women.
A rarely seen very early Beatrix Potter drawing, A Dream of Toasted Cheese was drawn to celebrate the publication of Henry Roscoe’s chemistry textbook in 1899. Illustration: Beatrix Potter/reproduced courtesy of the Lord Clwyd collection (image by way of The Guardian newspaper)
I’m sure you recognized the bunsen burner. From the James posting (Note: A link has been removed),
London-born, Henry Roscoe, whose family roots were in Liverpool, studied at University College London, before moving to Heidelberg, Germany, where he worked under Robert Bunsen, inventor of the new-fangled apparatus that inspired Potter’s drawing. Together, using magnesium as a light source, Roscoe and Bunsen reputedly carried out the first flashlight photography in 1864. Their research laid the foundations of comparative photochemistry.
These excerpts do not give full justice to James’ piece which I encourage you to read in its entirety.
This item about Turkish baths came to me via Chinese news agency Xinhua. In a March 10, 2016 news item on ShanghaiDaily.com,
It is very common to take a bath, yet it is quite a different experience to bathe in Istanbul’s famed hamams, or bath houses.
Bathing in a hamam is similar to that of a sauna, but is more closely related to ancient Greek and ancient Roman bathing practices, and it involves services like washing, aromatherapy oil massage, reflexology, Indian head massage and facial clay mask.
Both tourists and local Turks alike are fans of Turkish baths, said Banu Cagdas, the owner of Cagaloglu.
As customers are flocking and their number growing, hygiene appears to be the most important issue for Turkish baths.
“Visually there is nothing,” said Cagdas. “It looks like every corner is clean and no one can see the germs and viruses with the naked eye.”
Generally, Turkish baths have been using the traditional ways to maintain the state of hygiene, like bleach.
“The sterilization with bleach, especially a long-lasting sterilization, is very difficult to achieve,” Cagdas said, noting that after two hours of the cleaning, micro-organisms and bacteria start to reproduce again due to the warm and humid environment.
Fungal infections are among the most common diseases in Turkish baths. “Then comes all kind of genital diseases,” said Cagdas.
The team is turning to a cleaning agent developed by Turkish engineers from Sabanci University in Istanbul. The product, the result of five-year efforts based on nanotechnology, is called Antimics.
Antimics can stunt the production of germs, viruses, bacteria and fungi.
“We have been applying the solution to Cagaloglu bath once a month and we observe the rate of bacterium has been dropping each time even further,” Menceoglu told Xinhua.
She explained that Antimics enables the bath’s surface to be covered with a tiny antimicrobial coating and “no single microbe, virus or bacterium can hold on to after the application.”
“Every time we do the cleaning we witness that the bacteria level has been dropping drastically,” she said.
In addition, the eco-friendly new product is not harmful to humans, as opposed to the traditional disinfectant detergents that contain chemicals.
Earlier this year the US National Nanotechnology Initiative (NNI) through its National Nanotechnology Coordination Office (NNCO) established a student contest for nano images, EnvisioNano, (it’s mentioned in my April 9, 2015 post) and, now, a May 6, 2015 news item on Nanowerk announces the winner,
The National Nanotechnology Coordination Office (NNCO) has announced the winner of the first EnvisioNano nanotechnology image contest for students. Kyle Nowlin from the University of North Carolina Greensboro Joint School of Nanoscience and Nanoengineering won the top honors for his image entitled Polymer Nanocone Array.
The image, shown below, explores new ways of controlling the spread of bacteria and fungi through the use of nanostructured surfaces (NSS). Many insects have NSS that kill microbes on the outermost layer of their exoskeletons, protecting them from infection. Kyle’s research concentrates on creating new synthetic NSS materials in the lab that resemble those found in nature. Congratulations to Kyle!
Here’s the image,
Polymer Nanocone Array: The surface is a polymeric nanocone array that is generated by colloidal lithography, i.e. a masking of a polymeric substrate by nanoscale beads followed by a reactive ion etching. The inset shows more detailed structure to the individual nanocones which have 20nm ridges along their length. The image was acquired using a Zeiss Auriga SEM with the InLens detector and a 2keV electron beam. Image by: Kyle Nowlin Advisor: Dr. Dennis LaJeunesse School: University of North Carolina Greensboro, Joint School of Nanoscience and Nanoengineering, Department of Nanoscience [downloaded from http://www.nano.gov/node/1397]
Kyle’s description of his research: “Many insects display nanostructured surfaces (NSS) on their cuticles and many of these native NSS are inherently antimicrobial and kill microbes by mechanical/structure means. Our research explores the mechanisms that underlie the rupture of microbes on NSS. The native insect cuticles are complex materials that are difficult to replicate and to control specific surface properties. We have applied a colloidal lithographic process to generate novel synthetic NSS materials that resemble their biological insect cuticle counterparts in scale and shape but by using different polymeric materials to make these NSS can control surface properties of our biomimetic NSS. In this manner we will systematically identify the mechanical and physiochemical properties of rupturing NSS that lead to microbial demise. The goal of this research is to develop novel means of controlling the spread of pathogenic bacteria and fungi through nanostructured materials.”
The NNCO news release also provides more details about this year’s (2015) contest (Note: A link has been removed),
Thirty-two images were submitted by 10 students from universities across the country. Images were posted online for public voting. The top five images advanced to the semifinalist round. The final winner was chosen by representatives of the National Nanotechnology Initiative member agencies.