Monthly Archives: January 2025

DeepSeek, a Chinese rival to OpenAI and other US AI companies

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There’s been quite the kerfuffle over DeepSeek during the last few days. This January 27, 2025 article by Alexandra Mae Jones for the Canadian Broadcasting Corporation (CBC) news only was my introduction to DeepSeek AI, Note: A link has been removed,

There’s a new player in AI on the world stage: DeepSeek, a Chinese startup that’s throwing tech valuations into chaos and challenging U.S. dominance in the field with an open-source model that they say they developed for a fraction of the cost of competitors.

DeepSeek’s free AI assistant — which by Monday [January 27, 20¸25] had overtaken rival ChatGPT to become the top-rated free application on Apple’s App Store in the United States — offers the prospect of a viable, cheaper AI alternative, raising questions on the heavy spending by U.S. companies such as Apple and Microsoft, amid a growing investor push for returns.

U.S. stocks dropped sharply on Monday [January 27, 2025], as the surging popularity of DeepSeek sparked a sell-off in U.S. chipmakers.

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“[DeepSeek] performs as well as the leading models in Silicon Valley and in some cases, according to their claims, even better,” Sheldon Fernandez, co-founder of DarwinAI, told CBC News. “But they did it with a fractional amount of the resources is really what is turning heads in our industry.”

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What is DeepSeek?

Little is known about the small Hangzhou startup behind DeepSeek, which was founded out of a hedge fund in 2023, but largely develops open-source AI models. 

Its researchers wrote in a paper last month that the DeepSeek-V3 model, launched on Jan. 10 [2025], cost less than $6 million US to develop and uses less data than competitors, running counter to the assumption that AI development will eat up increasing amounts of money and energy. 

Some analysts are skeptical about DeepSeek’s $6 million claim, pointing out that this figure only covers computing power. But Fernandez said that even if you triple DeepSeek’s cost estimates, it would still cost significantly less than its competitors. 

The open source release of DeepSeek-R1, which came out on Jan. 20 [2025] and uses DeepSeek-V3 as its base, also means that developers and researchers can look at its inner workings, run it on their own infrastructure and build on it, although its training data has not been made available. 

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“Instead of paying Open $20 a month or $200 a month for the latest advanced versions of these models, [people] can really get these types of features for free. And so it really upends a lot of the business model that a lot of these companies were relying on to justify their very high valuations.”

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A key difference between DeepSeek’s AI assistant, R1, and other chatbots like OpenAI’s ChatGPT is that DeepSeek lays out its reasoning when it answers prompts and questions, something developers are excited about. 

“The dealbreaker is the access to the raw thinking steps,” Elvis Saravia, an AI researcher and co-founder of the U.K.-based AI consulting firm DAIR.AI, wrote on X, adding that the response quality was “comparable” to OpenAI’s latest reasoning model, o1.

U.S. dominance in AI challenged

One of the reasons DeepSeek is making headlines is because its development occurred despite U.S. actions to keep Americans at the top of AI development. In 2022, the U.S. curbed exports of computer chips to China, hampering their advanced supercomputing development.

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The latest AI models from DeepSeek are widely seen to be competitive with those of OpenAI and Meta, which rely on high-end computer chips and extensive computing power.

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Christine Mui in a January 27, 2025 article for Politico notes the stock ‘crash’ taking place while focusing on the US policy implications, Note: Links set by Politico have been removed while I have added one link

A little-known Chinese artificial intelligence startup shook the tech world this weekend by releasing an OpenAI-like assistant, which shot to the No.1 ranking on Apple’s app store and caused American tech giants’ stocks to tumble.

From Washington’s perspective, the news raised an immediate policy alarm: It happened despite consistent, bipartisan efforts to stifle AI progress in China.

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In tech terms, what freaked everyone out about DeepSeek’s R1 model is that it replicated — and in some cases, surpassed — the performance of OpenAI’s cutting-edge o1 product across a host of performance benchmarks, at a tiny fraction of the cost.

The business takeaway was straightforward. DeepSeek’s success shows that American companies might not need to spend nearly as much as expected to develop AI models. That both intrigues and worries investors and tech leaders.

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The policy implications, though, are more complex. Washington’s rampant anxiety about beating China has led to policies that the industry has very mixed feelings about.

On one hand, most tech firms hate the export controls that stop them from selling as much to the world’s second-largest economy, and force them to develop new products if they want to do business with China. If DeepSeek shows those rules are pointless, many would be delighted to see them go away.

On the other hand, anti-China, protectionist sentiment has encouraged Washington to embrace a whole host of industry wishlist items, from a lighter-touch approach to AI rules to streamlined permitting for related construction projects. Does DeepSeek mean those, too, are failing? Or does it trigger a doubling-down?

DeepSeek’s success truly seems to challenge the belief that the future of American AI demands ever more chips and power. That complicates Trump’s interest in rapidly building out that kind of infrastructure in the U.S.

Why pour $500 billion into the Trump-endorsed “Stargate” mega project [announced by Trump on January 21, 2025] — and why would the market reward companies like Meta that spend $65 billion in just one year on AI — if DeepSeek claims it only took $5.6 million and second-tier Nvidia chips to train one of its latest models? (U.S. industry insiders dispute the startup’s figures and claim they don’t tell the full story, but even at 100 times that cost, it would be a bargain.)

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Tech companies, of course, love the recent bloom of federal support, and it’s unlikely they’ll drop their push for more federal investment to match anytime soon. Marc Andreessen, a venture capitalist and Trump ally, argued today that DeepSeek should be seen as “AI’s Sputnik moment,” one that raises the stakes for the global competition.

That would strengthen the case that some American AI companies have been pressing for the new administration to invest government resources into AI infrastructure (OpenAI), tighten restrictions on China (Anthropic) and ease up on regulations to ensure their developers build “artificial general intelligence” before their geopolitical rivals.

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The British Broadcasting Corporation’s (BBC) Peter Hoskins & Imran Rahman-Jones provided a European perspective and some additional information in their January 27, 2025 article for BBC news online, Note: Links have been removed,

US tech giant Nvidia lost over a sixth of its value after the surging popularity of a Chinese artificial intelligence (AI) app spooked investors in the US and Europe.

DeepSeek, a Chinese AI chatbot reportedly made at a fraction of the cost of its rivals, launched last week but has already become the most downloaded free app in the US.

AI chip giant Nvidia and other tech firms connected to AI, including Microsoft and Google, saw their values tumble on Monday [January 27, 2025] in the wake of DeepSeek’s sudden rise.

In a separate development, DeepSeek said on Monday [January 27, 2025] it will temporarily limit registrations because of “large-scale malicious attacks” on its software.

The DeepSeek chatbot was reportedly developed for a fraction of the cost of its rivals, raising questions about the future of America’s AI dominance and the scale of investments US firms are planning.

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DeepSeek is powered by the open source DeepSeek-V3 model, which its researchers claim was trained for around $6m – significantly less than the billions spent by rivals.

But this claim has been disputed by others in AI.

The researchers say they use already existing technology, as well as open source code – software that can be used, modified or distributed by anybody free of charge.

DeepSeek’s emergence comes as the US is restricting the sale of the advanced chip technology that powers AI to China.

To continue their work without steady supplies of imported advanced chips, Chinese AI developers have shared their work with each other and experimented with new approaches to the technology.

This has resulted in AI models that require far less computing power than before.

It also means that they cost a lot less than previously thought possible, which has the potential to upend the industry.

After DeepSeek-R1 was launched earlier this month, the company boasted of “performance on par with” one of OpenAI’s latest models when used for tasks such as maths, coding and natural language reasoning.

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In Europe, Dutch chip equipment maker ASML ended Monday’s trading with its share price down by more than 7% while shares in Siemens Energy, which makes hardware related to AI, had plunged by a fifth.

“This idea of a low-cost Chinese version hasn’t necessarily been forefront, so it’s taken the market a little bit by surprise,” said Fiona Cincotta, senior market analyst at City Index.

“So, if you suddenly get this low-cost AI model, then that’s going to raise concerns over the profits of rivals, particularly given the amount that they’ve already invested in more expensive AI infrastructure.”

Singapore-based technology equity adviser Vey-Sern Ling told the BBC it could “potentially derail the investment case for the entire AI supply chain”.

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Who founded DeepSeek?

The company was founded in 2023 by Liang Wenfeng in Hangzhou, a city in southeastern China.

The 40-year-old, an information and electronic engineering graduate, also founded the hedge fund that backed DeepSeek.

He reportedly built up a store of Nvidia A100 chips, now banned from export to China.

Experts believe this collection – which some estimates put at 50,000 – led him to launch DeepSeek, by pairing these chips with cheaper, lower-end ones that are still available to import.

Mr Liang was recently seen at a meeting between industry experts and the Chinese premier Li Qiang.

In a July 2024 interview with The China Academy, Mr Liang said he was surprised by the reaction to the previous version of his AI model.

“We didn’t expect pricing to be such a sensitive issue,” he said.

“We were simply following our own pace, calculating costs, and setting prices accordingly.”

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A January 28, 2025 article by Daria Solovieva for salon.com covers much the same territory as the others and includes a few detail about security issues,

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The pace at which U.S. consumers have embraced DeepSeek is raising national security concerns similar to those surrounding TikTok, the social media platform that faces a ban unless it is sold to a non-Chinese company.

The U.S. Supreme Court this month upheld a federal law that requires TikTok’s sale. The Court sided with the U.S. government’s argument that the app can collect and track data on its 170 million American users. President Donald Trump has paused enforcement of the ban until April to try to negotiate a deal.

But “the threat posed by DeepSeek is more direct and acute than TikTok,” Luke de Pulford, co-founder and executive director of non-profit Inter-Parliamentary Alliance on China, told Salon.

DeepSeek is a fully Chinese company and is subject to Communist Party control, unlike TikTok which positions itself as independent from parent company ByteDance, he said. 

“DeepSeek logs your keystrokes, device data, location and so much other information and stores it all in China,” de Pulford said. “So you’ll never know if the Chinese state has been crunching your data to gain strategic advantage, and DeepSeek would be breaking the law if they told you.”  

I wonder if other AI companies in other countries also log keystrokes, etc. Is it theoretically possible that one of those governments or their government agencies could gain access to your data? It’s obvious in China but people in other countries may have the issues.

Censorship: DeepSeek and ChatGPT

Anis Heydari’s January 28, 2025 article for CBC news online reveals some surprising results from a head to head comparison between DeepSeek and ChatGPT,

The Chinese-made AI chatbot DeepSeek may not always answer some questions about topics that are often censored by Beijing, according to tests run by CBC News and The Associated Press, and is providing different information than its U.S.-owned competitor ChatGPT.

The new, free chatbot has sparked discussions about the competition between China and the U.S. in AI development, with many users flocking to test it. 

But experts warn users should be careful with what information they provide to such software products.

It is also “a little bit surprising,” according to one researcher, that topics which are often censored within China are seemingly also being restricted elsewhere.

“A lot of services will differentiate based on where the user is coming from when deciding to deploy censorship or not,” said Jeffrey Knockel, who researches software censorship and surveillance at the Citizen Lab at the University of Toronto’s Munk School of Global Affairs & Public Policy.

“With this one, it just seems to be censoring everyone.”

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Both CBC News and The Associated Press posed questions to DeepSeek and OpenAI’s ChatGPT, with mixed and differing results.

For example, DeepSeek seemed to indicate an inability to answer fully when asked “What does Winnie the Pooh mean in China?” For many Chinese people, the Winnie the Pooh character is used as a playful taunt of President Xi Jinping, and social media searches about that character were previously, briefly banned in China. 

DeepSeek said the bear is a beloved cartoon character that is adored by countless children and families in China, symbolizing joy and friendship.

Then, abruptly, it added the Chinese government is “dedicated to providing a wholesome cyberspace for its citizens,” and that all online content is managed under Chinese laws and socialist core values, with the aim of protecting national security and social stability.

CBC News was unable to produce this response. DeepSeek instead said “some internet users have drawn comparisons between Winnie the Pooh and Chinese leaders, leading to increased scrutiny and restrictions on the character’s imagery in certain contexts,” when asked the same question on an iOS app on a CBC device in Canada.

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Asked if Taiwan is a part of China — another touchy subject — it [DeepSeek] began by saying the island’s status is a “complex and sensitive issue in international relations,” adding that China claims Taiwan, but that the island itself operates as a “separate and self-governing entity” which many people consider to be a sovereign nation.

But as that answer was being typed out, for both CBC and the AP, it vanished and was replaced with: “Sorry, that’s beyond my current scope. Let’s talk about something else.”

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… Brent Arnold, a data breach lawyer in Toronto, says there are concerns about DeepSeek, which explicitly says in its privacy policy that the information it collects is stored on servers in China.

That information can include the type of device used, user “keystroke patterns,” and even “activities on other websites and apps or in stores, including the products or services you purchased, online or in person” depending on whether advertising services have shared those with DeepSeek.

“The difference between this and another AI company having this is now, the Chinese government also has it,” said Arnold.

While much, if not all, of the data DeepSeek collects is the same as that of U.S.-based companies such as Meta or Google, Arnold points out that — for now — the U.S. has checks and balances if governments want to obtain that information.

“With respect to America, we assume the government operates in good faith if they’re investigating and asking for information, they’ve got a legitimate basis for doing so,” he said. 

Right now, Arnold says it’s not accurate to compare Chinese and U.S. authorities in terms of their ability to take personal information. But that could change.

“I would say it’s a false equivalency now. But in the months and years to come, we might start to say you don’t see a whole lot of difference in what one government or another is doing,” he said.

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Graham Fraser’s January 28, 2025 article comparing DeepSeek to the others (OpenAI’s ChatGPT and Google’s Gemini) for BBC news online took a different approach,

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Writing Assistance

When you ask ChatGPT what the most popular reasons to use ChatGPT are, it says that assisting people to write is one of them.

From gathering and summarising information in a helpful format to even writing blog posts on a topic, ChatGPT has become an AI companion for many across different workplaces.

As a proud Scottish football [soccer] fan, I asked ChatGPT and DeepSeek to summarise the best Scottish football players ever, before asking the chatbots to “draft a blog post summarising the best Scottish football players in history”.

DeepSeek responded in seconds, with a top ten list – Kenny Dalglish of Liverpool and Celtic was number one. It helpfully summarised which position the players played in, their clubs, and a brief list of their achievements.

DeepSeek also detailed two non-Scottish players – Rangers legend Brian Laudrup, who is Danish, and Celtic hero Henrik Larsson. For the latter, it added “although Swedish, Larsson is often included in discussions of Scottish football legends due to his impact at Celtic”.

For its subsequent blog post, it did go into detail of Laudrup’s nationality before giving a succinct account of the careers of the players.

ChatGPT’s answer to the same question contained many of the same names, with “King Kenny” once again at the top of the list.

Its detailed blog post briefly and accurately went into the careers of all the players.

It concluded: “While the game has changed over the decades, the impact of these Scottish greats remains timeless.” Indeed.

For this fun test, DeepSeek was certainly comparable to its best-known US competitor.

Coding

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Brainstorming ideas

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Learning and research

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Steaming ahead

The tasks I set the chatbots were simple but they point to something much more significant – the winner of the so-called AI race is far from decided.

For all the vast resources US firms have poured into the tech, their Chinese rival has shown their achievements can be emulated.

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Reception from the science community

Days before the news outlets discovered DeepSeek, the company published a paper about its Large Language Models (LLMs) and its new chatbot on arXiv. Here’s a little more information,

DeepSeek-R1: Incentivizing Reasoning Capability in LLMs via Reinforcement Learning

[over 100 authors are listed]

We introduce our first-generation reasoning models, DeepSeek-R1-Zero and DeepSeek-R1. DeepSeek-R1-Zero, a model trained via large-scale reinforcement learning (RL) without supervised fine-tuning (SFT) as a preliminary step, demonstrates remarkable reasoning capabilities. Through RL, DeepSeek-R1-Zero naturally emerges with numerous powerful and intriguing reasoning behaviors. However, it encounters challenges such as poor readability, and language mixing. To address these issues and further enhance reasoning performance, we introduce DeepSeek-R1, which incorporates multi-stage training and cold-start data before RL. DeepSeek-R1 achieves performance comparable to OpenAI-o1-1217 on reasoning tasks. To support the research community, we open-source DeepSeek-R1-Zero, DeepSeek-R1, and six dense models (1.5B, 7B, 8B, 14B, 32B, 70B) distilled from DeepSeek-R1 based on Qwen and Llama.

Cite as: arXiv:2501.12948 [cs.CL]
(or arXiv:2501.12948v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2501.12948

Submission history

From: Wenfeng Liang [view email]
[v1] Wed, 22 Jan 2025 15:19:35 UTC (928 KB)

You can also find a PDF version of the paper here or another online version here at Hugging Face.

As for the science community’s response, the title of Elizabeth Gibney’s January 23, 2025 article “China’s cheap, open AI model DeepSeek thrills scientists” for Nature says it all, Note: Links have been removed,

A Chinese-built large language model called DeepSeek-R1 is thrilling scientists as an affordable and open rival to ‘reasoning’ models such as OpenAI’s o1.

These models generate responses step-by-step, in a process analogous to human reasoning. This makes them more adept than earlier language models at solving scientific problems and could make them useful in research. Initial tests of R1, released on 20 January, show that its performance on certain tasks in chemistry, mathematics and coding is on par with that of o1 — which wowed researchers when it was released by OpenAI in September.

“This is wild and totally unexpected,” Elvis Saravia, an AI researcher and co-founder of the UK-based AI consulting firm DAIR.AI, wrote on X.

R1 stands out for another reason. DeepSeek, the start-up in Hangzhou that built the model, has released it as ‘open-weight’, meaning that researchers can study and build on the algorithm. Published under an MIT licence, the model can be freely reused but is not considered fully open source, because its training data has not been made available.

“The openness of DeepSeek is quite remarkable,” says Mario Krenn, leader of the Artificial Scientist Lab at the Max Planck Institute for the Science of Light in Erlangen, Germany. By comparison, o1 and other models built by OpenAI in San Francisco, California, including its latest effort o3 are “essentially black boxes”, he says.

DeepSeek hasn’t released the full cost of training R1, but it is charging people using its interface around one-thirtieth of what o1 costs to run. The firm has also created mini ‘distilled’ versions of R1 to allow researchers with limited computing power to play with the model. An “experiment that cost more than £300 with o1, cost less than $10 with R1,” says Krenn. “This is a dramatic difference which will certainly play a role its future adoption.”

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The kerfuffle has died down for now.

Toronto’s ArtSci Salon hosts opening receptions for two very different exhibition events on February 5, 2025

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A January 27, 2025 ArtSci Salon notice (received via email and visible here on a mailchimp webpage for a limited time) announces the events. Here’s the first exhibition and its associated events,

Speculative Meteorology: Weather Channeled
Feb 3-7, [2-25] 10-4pm [ET] 

opening reception : Feb 5, [2025] 5-7pm [ET]
Special Projects Gallery,
Goldfarb Centre for the Arts
York University [Toronto, Ontario, Canada]

Curated by Aftab Mirzaei (Science and Technology Studies) with Mark-David Hosale (Digital Media) and showcases the work of artists and researchers including, Chris Beaulieu, Kwame Kyei-Boateng, Nava Waxman, Mark-David Hosale, Hiro Kubayashi, Grace Grothaus, Leo Liu, Winnie Luo, Aftab Mirzaei, and Colin Tucker.

DESCRIPTION
Speculative Meteorology: Weather Channeled emerges from a series of interdisciplinary experiments conducted by members of the nd:studiolab between 2023 and 2024. This exhibit invites artists and researchers to explore imaginative and multidimensional accounts of atmospheres and climates across past, present, and future. Drawing on Donna Haraway’s concept of SF—speculative fabulation as a mode of attention, a theory of history, and a practice of worlding—the works collectively reimagine our relationship to the weather, engaging it as a site of both knowledge-making and creative practice.

Sponsored by the nD::StudioLab at York University   

Environmental Monitoring for Art
a workshop as part of the Speculative Meteorology: Weather Channeled interdisciplinary art exhibition,
with Grace Grothaus

Feb 7, 2025, 12 -3 PM [ET]
ACW 103, The Transmedia Lab
York University [Toronto, Ontario, Canada]

In this three-hour workshop, we will fabricate sensors that can detect environmental data using some readily available materials and electronics. We will fabricate sensors that can detect animal footsteps, record raindrops, or measure wind and then learn to read their values using Arduino. The data from these sensors can be used as input for actuators in physical computing projects, or they can be triggers for screen-based animation or music – the options are wide and varied.

Space is limited, click here to sign up

Here’s the second exhibition and its associated events, from the January 25, 2025 notice,

Afterglow Exhibition
Feb 4-7, [2-25] 10-3pm [ET]

opening reception : Feb 5, [2025] 5-7pm [ET] 
Gales Gallery,
York University [Toronto, Ontario, Canada]

Curated by : Nina Czegledy & Joel Ong, featuring international and local artists Raphael Arar, Nagy Molnar, Laszlo Zsolt Bordos, Jennifer Willet, Joel Ong (with Khaled Eilouti,  Zhino Yousefi, Shelby Murchie and Oliver Debski-Tran)

AFTERGLOW [ af-ter-gloh, ahf- ] is an exhibition envisioned around the graphic quality of light, as well as its traces and incandescence both real and metaphorical. The participating artists explore cross-cultural practices via a variety of analog and digital media, relating light to unfolding contemporary considerations in the global Light Art panorama. At the same time, Afterglow references a deep resonance with the past, paying tribute to historical ideas that have illuminated our current understandings of interconnected systems of values and beliefs that underly the complementary artistic practices today.

In the words of pioneering Hungarian artist György Kepes (1906-2001) : “Our human nature is profoundly phototropic”. The exhibition is a reminder of the integral nature of light to human and more-than-human life, but also to the notion of light as a sensory environment within which we remain rooted, transfixed and nourished.  The exhibiting artists take up these ideas in various formations, alluding to the physical, metaphorical and ecological implications of light. As an initial exhibition prototype, Afterglow is presented first at the Gales Gallery at York University in Toronto as it grows towards future touring exhibitions and symposia. The exhibition is integrated with a virtual Symposium that features exhibiting artists as well as International artists/theorists in conversation. Please proceed to our Eventbrite page for more details and registration [see below].  – Nina Czegledy, Joel Ong. 

Afterglow Symposium
Feb 6 [2025] 1-3pm [ET]
Symposium Presenters: Andrea Polli, Jennifer Willet, Joel Ong, Karolina Halatek, Marton Orostz, Nina Czegledy and Raphael Arar.

ONLINE, Register Here (Zoom link)

How to reach the three venues (Special Projects and Gales Galleries + Transmedia lab)?

click here

If you’re in Toronto, you’re spoiled for choices. As for the rest of us, the Afterglow Symposium, as a hybrid event, offers an opportunity to hear from the artists.

Association for Advancing Participatory Sciences (AAPS; formerly the Citizen Science Association) January 2025 newsletter highlights

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Here are a few excerpts from the Association for Advancing Participatory Sciences (AAPS; formerly the Citizen Science Association) January 2025 newsletter (received via email),

AI and the Future of Citizen Science: event and special collection

WEBINAR: Thursday, February 6 [2025], 12pm US Eastern Time

A conversation with editors and leaders

In December we announced a new special collection on the Future of Artificial Intelligence and Citizen Science. This open-access special collection of 12 papers explores the potential of AI coupled with citizen science in accelerating data processing, expanding project reach, enhancing data quality, and broadening engagement opportunities.

To help orient you to the themes covered in the special collection, issue editors Lucy Fortson, Kevin Crowston, Laure Kloetzer, and Marisa Ponti will join us for a special conversation with Marc Kuchner, Citizen Science Officer, NASA, February 6, 12pm ET. This event will go beyond a recap of papers presented in the special collection, and invite panelists to share their thoughts and perspectives on ethical considerations, challenges, and future directions. 

>>Register here for this conversation on AI 

Interested in Citizen Science: Theory & Practice? 

Call for Abstracts (closing soon): Galleries, Libraries, Archives, and Museums

A call for abstracts is open for a forthcoming Special Collection in Citizen Science: Theory and Practice which will explore galleries, libraries, archives, and museums (GLAM) participatory science efforts in order to support and empower the global field of participatory sciences. By sharing innovative practices and advancing theories, this collection will contribute to the continued refinement of best practices in these vital ‘third spaces’ and beyond. Issue overview and submission deadlines and logistics are available on the AAPS website. Abstracts accepted through 28 February 2025.

>> Share this call for papers with the GLAM organizations in your network 

More events from the AAPS-partnered 2025 NASA Cit Sci Leaders Series: 

Artificial Intelligence, Open Data, Funding, and more

The NASA Citizen Science Leaders Series is a professional learning service for those leading, hoping to lead, or wanting to learn more about NASA Citizen Science. The following events are open to the public. 

  • Artificial Intelligence: This event, in collaboration with AAPS, features the issue editors from the new Special Collection sharing their key takeaways and hot takes on the topic.  Register here. [February 6, 2025] Noon ET start.
  • Artificial Intelligence in practice: On February 20 [2025] the Zooniverse’s Dr. Laura Trouille will join us to share new functionality of the Zooniverse platform, including ways that Zooniverse projects are adjusting to work with new Artificial Intelligence/ machine learning tools. Register here. Noon ET start.
  • Open Data Management plans and long-term archives of citizen science project data: On March 6 [2025] Dr. Steven Crawford who leads NASA’s Open Science work will discuss these issues and more. Register here.3 pm ET start.
  • Funding: On March 13 [2025] explore landscape of different NASA proposal calls and hear insights on how solicitations are written, how proposals are reviewed, and how funding is handled. Register here. 3 pm ET start.

…

Members in AAPS Connect can get instant notices when opportunities are posted, often directly from the source. Interested in direct networking with field leaders and being the first to hear of important jobs, grants, and more?  Become a member of AAPS (tiered pricing costs as little as $0).

Jobs:

  • iNaturalist is hiring a Senior Communications Manager responsible for delivering engaging, visual communications about iNaturalist to reach and engage new audiences. Full details here.
  • Reef Environmental Education Foundation (REEF) is hiring an Education coordinator to support activities related to REEF Ocean Explorers and Discovery programming, including K-12 and lifelong learning education and public outreach programs. Full details available here.
  • Cornell Lab of Ornithology is hiring an Extension Associate to as the thought leader and team leader for Youth and Community Engagement for the Lab both nationally and in international settings, with key responsibilities in strategic planning, partnership development, implementation, and evaluation of impact. Full details available here. 

…

Should you be interested in received AAPS newsletters, visit the organization’s homepage.

Explaining topological insulators with dance

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This must have been some high school physics class. A November 5, 2024 news item on ScienceDaily explains how physics topological insulators and dance intersected for three classes,

Science can be difficult to explain to the public. In fact, any subfield of science can be difficult to explain to another scientist who studies in a different area. Explaining a theoretical science concept to high school students requires a new way of thinking altogether.

This is precisely what researchers at the University of California San Diego did when they orchestrated a dance with high school students at Orange Glen High School in Escondido as a way to explain topological insulators.

The experiment, led by former graduate student Matthew Du and UC San Diego Associate Professor of Chemistry and Biochemistry Joel Yuen-Zhou, was published in Science Advances.

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A November 5, 2024 University of California at San Diego (UC San Diego) news release (also on EurekAlert), which originated the news item, provides more detail about how the researchers employed dance to teach physics concepts, Note: A link has been removed,

“I think the concept is simple,” stated Yuen-Zhou. “But the math is much harder. We wanted to show that these complex ideas in theoretical and experimental physics and chemistry are actually not as impossible to understand as you might initially think.”

Topological insulators are a relatively new type of quantum material that has insulating properties on the inside, but have conductive properties on the outside. To use a Southern California staple, if a topological insulator was a burrito, the filling would be insulating and the tortilla would be conducting.

Since topological insulators are able to withstand some disorder and deformation, they can be synthesized and used under conditions where imperfections can arise. For this reason, they hold promise in the areas of quantum computing and lasers, and in creating more efficient electronics.

To bring these quantum materials to life, the researchers made a dance floor (topological insulator) by creating a grid with pieces of blue and red tape. Then to choreograph the dance, Du created a series of rules that governed how individual dancers moved.

These rules are based on what is known as a Hamiltonian in quantum mechanics. Electrons obey rules given by a Hamiltonian, which represents the total energy of a quantum system, including kinetic and potential energy. The Hamiltonian encodes the interactions of the electron in the potential energy of the material.

Each dancer (electron) had a pair of flags and was given a number that corresponded to a movement:

  •  1 = wave flags with arms pointing up
  •  0 = stand still
  • -1 = wave flags with arms pointing down

Subsequent moves were based on what a neighboring dancer did and the color of the tape on the floor. A dancer would mimic a neighbor with blue tape, but do the opposite of a neighbor with red tape. Individual mistakes or dancers leaving the floor didn’t disrupt the overall dance, exhibiting the robustness of topological insulators.

In addition to topology, Yuen-Zhou’s lab also studies chemical processes and photonics, and it was in thinking of light waves that they realized the movement of a group of people also resembled a wave. This gave Yuen-Zhou the idea of using dance to explain a complex topic like topological insulators. Implementing this idea seemed like a fun challenge to Du, who is currently a postdoctoral scholar at the University of Chicago and takes salsa lessons in his free time.

Du, who comes from a family of educators and is committed to scientific outreach, says the project gave him an appreciation for being able to distill science into its simplest elements.

“We wanted to demystify these concepts in a way that was unconventional and fun,” he stated. “Hopefully, the students were able to see that science can be made understandable and enjoyable by relating it to everyday life.”   

Full list of authors: Matthew Du, Juan B. Pérez-Sánchez, Jorge A. Campos-Gonzalez-Angulo, Arghadip Koner, Federico Mellini, Sindhana Pannir-Sivajothi, Yong Rui Poh, Kai Schwennicke, Kunyang Sun, Stephan van den Wildenberg, Alec Barron and Joel Yuen-Zhou (all UC San Diego); and Dylan Karzen (Orange Glen High School).

This research was supported by an National Science Foundation CAREER grant (CHE 1654732).

Here’s what it looked like,

series of overhead images of dancers on dance floor grid
Snapshots showing dancers on the edge of the topological insulator moving in a clockwise direction. Courtesy of University of California at San Diego

You may find this helps you to understand what’s happening in the pictures,

Before getting to a link and citation for the paper, here’s the paper’s abstract,

Topological insulators are insulators in the bulk but feature chiral energy propagation along the boundary. This property is topological in nature and therefore robust to disorder. Originally discovered in electronic materials, topologically protected boundary transport has since been observed in many other physical systems. Thus, it is natural to ask whether this phenomenon finds relevance in a broader context. We choreograph a dance in which a group of humans, arranged on a square grid, behave as a topological insulator. The dance features unidirectional flow of movement through dancers on the lattice edge. This effect persists when people are removed from the dance floor. Our work extends the applicability of wave physics to dance. [emphasis mine]

I wonder if we’re going to see some ‘wave physics’ inspired dance performances.

Finally, here’s a link to and a citation for the paper,

Chiral edge waves in a dance-based human topological insulator by Matthew Du, Juan B. Pérez-Sánchez, Jorge A. Campos-Gonzalez-Angulo, Arghadip Koner, Federico Mellini, Sindhana Pannir-Sivajothi, Yong Rui Poh, Kai Schwennicke, Kunyang Sun, Stephan van den Wildenberg, Dylan Karzen, Alec Barron, and Joel Yuen-Zhou. Science Advances 28 Aug 2024 Vol 10, Issue 35 DOI: 10.1126/sciadv.adh7810

This paper is open access.

I think this is the first year I’ve stumbled across two stories about physics and dance in one year. Here’s the other one, “Happy Canada Day! Breakdancing at the 2024 Paris Summer Olympics: physics in action + heat, mosquitoes, and sports” in a July 1, 2024 posting.

New digital technologies could unlock greater potential for microbes and fungi and some thoughts on civil society groups

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Not sure how this escaped my notice for so long: an August 7, 2024 news item on phys.org presents an intriguing proposition,

Microbes and fungi have long been nature’s helpers in producing fine food, drinks and medicine, but new digital technologies could unlock far greater potential for the European biotech sector.

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An August 6, 2024 article by Anthony King for Horizon; The EU Research & *Innovation magazine, which originated the news item, explores the matter further, Note: A link has been removed,

Beer may not be the answer to all of life’s problems, but the science behind it could help decarbonise industrial processes and clean up the environment.

Biotechnology, which uses living organisms to create different products or processes, remains important in today’s production of food and drink. But it is also increasingly used for a wide range of industrial products, including medicines, where it combines ancient principles with cutting-edge technology.

Ancient wisdom, modern processes

‘We’ve used biotechnology for thousands of years to make cheese, to make beer, to make wine,’ said Michael O’Donohue, an expert in microbial enzymes and industrial biotechnology at France’s National Research Institute for Agriculture, Food and Environment (INRAE).

…

Little workhorses

Biotech has already transformed our lives, far beyond improving the taste of beer. Modern advances started with the use of fungi in the early 20th century to make life-saving antibiotics. Today, biotech remains crucial for making medicines.

As O’Donohue explained, ‘the workhorses of biotechnology at an industrial level are mainly yeast and filamentous fungi.’ 

But because yeasts can be unpredictable in what compound, and how much, they produce, Bioindustry 4.0 [EU-funded project], which runs until December 2026, will use digital technology to improve the consistency of biotech outcomes.

An upside of biotechnology is that it can offer a cleaner alternative to traditional chemical manufacture.

…

Playing catch-up

Biotech is a major global industry worth €720 billion in 2021, but Europe currently lags behind the US. The European Commission describes biotechnology as “one of the most promising technological areas of this century” and has taken steps to boost it in Europe.

‘The US is the big player. They take 60% of the cake,’ said O’Donohue. ‘We’ve identified several weaknesses in Europe for biotech. We’ve got a fragmented landscape, which makes it quite tricky, if you are developing biotechnology, to know what is available and where.’

Nevertheless, O’Donohue said, the potential is there. ‘Europe was the birthplace of modern biotechnology. We have a lot of infrastructure. We have a lot of expertise.’

…

Building the market

The concept has already been put to work, assisting young European companies such as Calidris Bio, a Belgian start-up that aims to manufacture high-quality protein using fewer resources. 

‘We want to bring it to the market as an ingredient to replace fishmeal and soy that at the moment is not grown sustainably,’ said Lieve Hoflack, a co-founder of Calidris Bio. 

But producing the protein is just half the battle. A new product must be tested for safety, taste and nutritional value. 

‘With IBISBA, we found a place with the right equipment, the right expertise and also the right mindset to bring our process to the next step,’ said Hoflack.

The European Commission has said it aims to boost biotechnology to combat climate change and resource scarcity. It is working towards an EU Biotech Act and aims to promote regulatory sandboxes to test novel approaches in a controlled environment for a limited amount of time, under regulatory supervision.

…

IBISBA describes itself as “a pan-European distributed research infrastructure dedicated to industrial biotechnology” on its About webpage.

Civil society groups and their protests

As interesting as King’s August 6, 2024 article is, it doesn’t mention the campaigns against biotechnology, which had a dampening effect on research in many countries. Here’s more about the history of these efforts in an October 9, 2023 article on the Genetic Literacy Project website, Note: Links have been removed,

ETC Group: ‘Extreme’ biotechnology critic campaigns against synthetic biology and other forms of ‘extreme genetic engineering’

screen shot at pm

The ETC group, an international NGO based in Canada, claims it monitors the “impact of emerging technologies” that impact biodiversity, agriculture and human rights. It promotes imposing an extreme version of the ‘precautionary principle’ to all technologies, claiming that many modern innovations, including genetic engineering of crops and medicines, are too risky to implement, and even basic research should be suspended indefinitely.

ETC Group works with other radical environmental groups such as Friends of he Earth, campaigning against nearly every application of genetic engineering, including biotechnology-based disease research, synthetic biology, and most aggressively gene drives, which it refers to as “extreme genetic engineering” an claims it will result in the “end of Nature.” ETC Group calls has criticized increased corporate involvement in food and agriculture, what it calls threats to biodiversity and farmers’ rights, and what it sees as insufficient government regulation.

“The speed with which those developments are scaling up is often presented in terms of carefully crafted speculative conservation and health benefits while the overwhelming military interest driving these developments, while not hidden, has been very much downplayed,” ETC Group co-executive director Jim Thomas has said, citing the military’s interest in synthetic biology.

ETC Group staff members are often quoted by major media outlets criticizing various applications of genetic engineering. The organization has used Freedom of Information Acts (FOIA) to obtain emails and background information on university and government research, which they provide to journalists.

…

Obviously, the article was not written as a love letter. While I find the tone a bit harsh, I have seen how at least one civil society group has distorted research results to prove its point. More about that later.

ETC history

From the October 9, 2023 article for the Genetic Literacy Project, Note: A link has been removed,

Originally formed in the late 1970s as Rural Advancement Foundation International (RAFI), the group changed its name to the ETC Group in 2001. Its official name is the Action Group on Erosion, Technology and Concentration.

ETC Group is a registered CSO in Canada and The Netherlands. Friends of ETC Group is a private non-profit organization under section 501(c)3 in the United States.

The group claims to be the “first civil society organization (nationally or internationally) to draw attention to the socioeconomic and scientific issues related to the conservation and use of plant genetic resources, intellectual property and biotechnology.”

According to the group’s website, “In the late 1970s, we were the first CSO to recognize the trend toward life patenting and the first to organize against national plant patenting laws (plant breeders’ rights).” In the 1990s, the ETC Group says its work “expanded to encompass social and environmental concerns related to biotechnology, biopiracy, human genomics and, in the late 1990s, to nanotechnology.” [emphases mine]

Distortions

By the time I started this blog in May/June 2008, the biotechnology protests were winding down. One of the new focal points for civil society groups was nanotechnology and that’s where I observed the distortions.

A Friends of the Earth (FOE) report

My first observation dates as far back as this August 20, 2009 posting, Note: Links have been removed,

In a bit of interesting timing given that it’s on the heels of the publication of a study about two tragic deaths which are being attributed to exposure to nanoparticles, the Friends of the Earth (FOE) organization has released a report titled Nano-Sunscreens: Not Worth the Risk.The media release can be found on Azonano or Nanowerk News.

I have read the report (very quickly) and noted that they do not cite or mention the recently released report on the same topic by the Environmental Working Group (EWG) which stated that after an extensive review of the literature, there was no evidence that the titanium dioxide or zinc oxide nanoparticles used in sunscreens were dangerous. (posting here).

Shortly after the EWG report’s release, a new study (which I mentioned here … if you are inclined, do read the comments as some additional points about reading research critically are brought out)  suggested concerns based on the work of researchers in Japan.  The new study from Japan is cited in the Friends of the Earth report.

While the overall tone of the FOE report is fairly mild (they suggest precaution) they cite only a few studies supporting their concern [emphasis mine] and they damage their credibility (in my book) by ignoring a report from a well respected group that reluctantly admitted that there is no real cause for concern about nanoparticles in sunscreens based on the current evidence.

…

Zinc dioxide nanoparticles in sunscreens

About a year later in a July 20, 2010 posting I featured some issues with how Friends of the Earth (Georgia Miller, Australian representative, and Ian Illuminato, North American representative) guest blogging on another blog known as “2020 Science” distorted research findings from a study on zinc oxide nanoparticles in sunscreens. Dr. Andrew Maynard, the blog owner, made some critical observations about their posting. In addition, the researcher for the study, along with two other scientists, noted distortions in the Miller and Illumanito critique.

Two Chinese workers, nanoparticles and death

This excerpt from a July 26, 2011 posting is my critique of an article by Alex Roslin in a local newspaper, which relied almost exclusively on a report from the Friends of the Earth,

It’s good to see articles about nanotechnology. The recent, Tiny nanoparticles could be a big problem, article written by Alex Roslin for the Georgia Straight (July 21, 2011 online or July 21-28, 2011 paper edition) is the first I’ve seen on that topic in that particular newspaper. Unfortunately, there are  some curious bits of information included in the article, which render it, in my opinion, difficult to trust.

I do agree with Roslin that nanoparticles/nanomaterials could constitute a danger and there are a number of studies which indicate that, at the least, extreme caution in a number of cases should be taken if we choose to proceed with developing nanotechnology-enabled products.

One of my difficulties with the article is the information that has been left out. (Perhaps Roslin didn’t have time to properly research?) At the time (2009) I did read with much concern the reports Roslin mentions about the Chinese workers who were injured and/or died after working with nanomaterials. As Roslin points out,

“Nanotech already appears to be affecting people’s health. In 2009, two Chinese factory workers died and another five were seriously injured in a plant that made paint containing nanoparticles.

The seven young female workers developed lung disease and rashes on their face and arms. Nanoparticles were found deep in the workers’ lungs.

“These cases arouse concern that long-term exposure to some nanoparticles without protective measures may be related to serious damage to human lungs,” wrote Chinese medical researchers in a 2009 study on the incident in the European Respiratory Journal.”

Left undescribed by Roslin are the working conditions; the affected people were working in an unventilated room. From the European Respiratory Journal article (ERJ
September 1, 2009 vol. 34 no. 3 559-567, free access), Exposure to nanoparticles is related to pleural effusion, pulmonary fibrosis and granuloma,

“A survey of the patients’ workplace was conducted. It measures ∼70 m2, has one door, no windows and one machine which is used to air spray materials, heat and dry boards. This machine has three atomising spray nozzles and one gas exhauster (a ventilation unit), which broke 5 months before the occurrence of the disease. The paste material used is an ivory white soft coating mixture of polyacrylic ester.

Eight workers (seven female and one male) were divided into two equal groups each working 8–12 h shifts. Using a spoon, the workers took the above coating material (room temperature) to the open-bottom pan of the machine, which automatically air-sprayed the coating material at the pressure of 100–120 Kpa onto polystyrene (PS) boards (organic glass), which can then be used in the printing and decorating industry. The PS board was heated and dried at 75–100°C, and the smoke produced in the process was cleared by the gas exhauster. In total, 6 kg of coating material was typically used each day. The PS board sizes varied from 0.5–1 m2 and ∼5,000 m2 were handled each workday. The workers had several tasks in the process including loading the soft coating material in the machine, as well as clipping, heating and handling the PS board. Each worker participated in all parts of this process.

Accumulated dust particles were found at the intake of the gas exhauster. During the 5 months preceding illness the door of the workspace was kept closed due to cold outdoor temperatures. The workers were all peasants near the factory, and had no knowledge of industrial hygiene and possible toxicity from the materials they worked with. The only personal protective equipment used on an occasional basis was cotton gauze masks. According to the patients, there were often some flocculi produced during air spraying, which caused itching on their faces and arms. It is estimated that the airflow or turnover rates of indoor air would be very slow, or quiescent due to the lack of windows and the closed door.” [emphases mine]

…

Here’s the full text from the researchers’ conclusion,

“In conclusion, these cases arouse concern that long-term exposure to some nanoparticles without protective measures may be related to serious damage to human lungs. It is impossible to remove nanoparticles that have penetrated the cell and lodged in the cytoplasm and caryoplasm of pulmonary epithelial cells, or that have aggregated around the red blood cell membrane. Effective protective methods appear to be extremely important in terms of protecting exposed workers from illness caused by nanoparticles.”

There is no question that serious issues about occupational health and safety with regards to nanomaterials were raised. But, we work with dangerous and hazardous materials all the time; precautions are necessary whether you’re working with hydrochloric acid or engineered nanoparticles. (There are naturally occurring nanoparticles too.)

…

In general, I found the tenor of the article more alarmist than informational and I’m sorry about that as I would like to see more information being shared and, ultimately, public discussion in Canada about nanotechnology and other emerging technologies.

Unintended consequences

After years of concerted effort the Friends of the Earth saw this result in Australia,

Friends of the Earth (FoE) Australia has waged a campaign against the use of nanosunscreens. It seems to have been somewhat successful but in a way that I imagine is upsetting. From the Feb. 9, 2012 news item on physorg.com,

The Cancer Council of Australia reports that we have one of the highest rates of skin cancer in the world, with over 440,000 people receiving medical treatment for skin cancers each year, and over 1,700 people dying of all types of skin cancer annually.

The survey of public attitudes towards sunscreens with nanoparticles, commissioned by the Australian Department of Industry, Innovation, Science, Research and Tertiary Education and conducted last month, showed that about 17% of people in Australia were so worried about the issue, they would rather risk skin cancer by going without sunscreen than use a product containing nanoparticles. [emphasis mine] [please see correction at the end of this posting]

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*’17%’ corrected to ‘13%’ on Sept. 22, 2016.

Unexpected outcomes

Here’s what happened, eventually, to the EWG and its work on sunscreens, from a June 23, 2020 posting “Sunscreens 2020 and the Environmental Working Group (EWG),”

There must be some sweet satisfaction or perhaps it’s better described as relief for the Environmental Working Group (EWG) now that sunscreens with metallic (zinc oxide and/or titanium dioxide) nanoparticles are gaining wide acceptance. (More about the history and politics EWG and metallic nanoparticles at the end of this posting.)

This acceptance has happened alongside growing concerns about oxybenzone, a sunscreen ingredient that EWG has long warned against. Oxybenzone has been banned from use in Hawaii due to environmental concerns (see my July 6, 2018 posting; scroll down about 40% of the way for specifics about Hawaii). Also, it is one of the common sunscreen ingredients for which the US Food and Drug Administration (FDA) is completing a safety review.

Today, zinc oxide and titanium dioxide metallic nanoparticles are being called minerals, as in, “mineral-based” sunscreens. They are categorized as physical sunscreens as opposed to chemical sunscreens.

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A few thoughts on civil societies, business, and technological progress

The description of how sunscreens and other products with engineered nanoparticles were presented in misleading reports and articles is unfortunately not unusual where many civil society groups are concerned. (i found that very disillusioning.)

As for business and industry group, they use the same tactics.

Whether the topic is cigarette smoking, genetically modified organisms, engineered nanoparticles in sunscreens, etc. I keep reminding myself it’s best to consult more than one source and to remember that things change. All we’ve got to work with is the information at hand.

In the end, civil society groups provide an important function as do business and industrial groups. Trusting everything they say, is not a good idea. Something to remember when looking up organizations such as the Genetic Literacy Project and reading people like me.

Physicists study Bach, Mozart, and jazz

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This November 5, 2024 news item on phys.org takes a while before revealing how science is involved in the research,

Physicists at the Max Planck Institute for Dynamics and Self-Organization (MPI-DS) have investigated to which extent a piece of music can evoke expectations about its progression. They were able to determine differences in how far compositions of different composers can be anticipated. In total, the scientists quantitatively analyzed more than 550 pieces from classical and jazz music.

It is common knowledge that music can evoke emotions. But how do these emotions arise and how does meaning emerge in music? Almost 70 years ago, music philosopher Leonard Meyer suggested that both are due to an interplay between expectation and surprise.

In the course of evolution, it was crucial for humans to be able to make new predictions based on past experiences. This is how we can also form expectations and predictions about the progression of music based on what we have heard. According to Meyer, emotions and meaning in music arise from the interplay of expectations and their fulfillment or (temporary) non-fulfillment.

A team of scientists led by Theo Geisel at the MPI-DS and the University of Göttingen have asked themselves whether these philosophical concepts can be quantified empirically using modern methods of data science. …

Physicists at the MPI-DS have investigated the variability in music pieces by different composers. They found a high initial autocorrelation of pitches, which ends relatively abruptly after a certain time, thus making further anticipation impossible. (image generated with AI) [less] © MPI-DS [downloaded from https://phys.org/news/2024-11-bach-mozart-jazz-scientists-quantitative.html]

A November 5, 2024 Max Planck Institute for Dynamics and Self-Organization press release (also on EurekAlert), which originated the news item, offers technical details about the work,

… In a paper published recently in Nature Communications, they used time series analysis to infer the autocorrelation function of musical pitch sequences; it measures how similar a tone sequence is to previous sequences. This results in a kind of “memory” of the piece of music. If this memory decreases only slowly with time difference, the time series is easier to anticipate; if it vanishes rapidly, the time series offers more variation and surprises. 

In total, the researchers Theo Geisel and Corentin Nelias analyzed more than 450 jazz improvisations and 99 classical compositions in this way, including multi-movement symphonies and sonatas. They found that the autocorrelation function of pitches initially decreases very slowly with the time difference. This expresses a high similarity and possibility to anticipate musical sequences. However, they found that there is a time limit, after which this similarity and predictability ends relatively abruptly. For larger time differences, the autocorrelation function and memory are both negligible.

Of particular interest here are the values of the transition times of the pieces where the more predictable behavior changes into a completely unpredictable and uncorrelated behavior. Depending on the composition or improvisation, the scientists found transition times ranging from a few quarter notes to about 100 quarter notes. Jazz improvisations typically had shorter transition times than many classical compositions, and therefore were usually less predictable. Differences could also be observed between different composers. For example, the researchers found transition times between five and twelve quarter notes in various compositions by Johann Sebastian Bach, while the transition times in various compositions by Mozart ranged from eight to 22 quarter notes. This implies that the anticipation and expectation of the musical progression tends to last longer in Mozart’s compositions than in Bach’s compositions, which offer more variability and surprises.

For Theo Geisel, the initiator and head of this research project, this also explains a very personal observation from his high school days: “In my youth, I shocked my music teacher and conductor of our school orchestra by saying that I often couldn’t show much enthusiasm for Mozart’s compositions,” he says. “With the transition times between highly correlated and uncorrelated behavior, we have now found a quantitative measure for the variability of music pieces, which helps me to understand why I liked Bach more than Mozart.”

Here’s a link to and a citation for the paper,

Stochastic properties of musical time series by Corentin Nelias & Theo Geisel. Nature Communications volume 15, Article number: 9280 (2024) DOI: https://doi.org/10.1038/s41467-024-53155-y Published: 28 October 2024

This paper is open access.

There was a Theodor Geisel who in the US and Canada was better known as Dr. Seuss.

Cellulose nanofibers for sustainable hydrophobic paper

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A November 5, 2024 news item on phys.org announces research with cellulose nanofibers (CNFx)

A recent study has aimed to create hydrophobic paper by exploiting the mechanical properties and water resistance of cellulose nanofibers, and so produce a sustainable, high-performance material suitable for packaging and biomedical devices. This involved a supramolecular approach, i.e., combining short chains of proteins (peptide sequences) that do not chemically modify the cellulose nanofibers. Sustainable hydrophobic paper may one day replace petroleum-related products.

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An August 11, 2024 Politecnico di Milano (Polytechnic University of Milan) press release, also on EurekAlert but published November 5, 2024), which originated the news item, provides more information, Note: Links have been removed,

The aim was to create hydrophobic paper by exploiting the mechanical properties and water resistance of cellulose nanofibres, and so produce a sustainable, high-performance material suitable for packaging and biomedical devices. This involved a supramolecular approach, i.e. combining short chains of proteins (peptide sequences) that do not chemically modify the cellulose nanofibres. Sustainable hydrophobic paper may one day replace petroleum-related products.

The study is entitled: Nanocellulose-short peptide self-assembly for improved mechanical strength and barrier performance, and has just featured on the cover of the Journal of Materials Chemistry B. The work was carried out by researchers from the “Giulio Natta” Department of Chemistry, Materials and Chemical Engineering at the Politecnico di Milano, in collaboration with Aalto University, the VTT-Technical Research Centre in Finland and the SCITEC Institute of the CNR.

Cellulose nanofibres (CNFs) are natural fibres derived from cellulose – a renewable and biodegradable source – and are well known for their strength and versatility. In the study, the researchers from the SupraBioNanoLab (https://www.suprabionano.eu/) of the “Giulio Natta” Department of the Politecnico di Milano showed how it is possible to greatly improve the properties of cellulose nanofibres without chemically modifying them, instead adding small proteins known as peptides.

“Our supramolecular approach involved adding small sequences of peptides, which bind onto the nanofibres and so improve their mechanical performance and water-resistance. Elisa Marelli, co-author of the study, explained the methodology:“The results of the study showed that even minimal quantities of peptides (less than 0.1%) can significantly increase the mechanical properties of the hybrid materials produced, giving them greater resistance to stress.”

Finally, the researchers assessed the impact of adding fluorine atoms in the peptide sequences. This made it possible to create a structured hydrophobic film on the material, providing even greater water resistance while still preserving its biocompatible and sustainable characteristics.

As Pierangelo Metrangolo, co-author of the study, pointed out: “This advance opens up new opportunities for creating biomaterials that can compete with petroleum-derived materials in terms of performance, achieving the same quality and efficiency while reducing environmental impact. These hybrid materials are very suitable for sustainable packaging, where resistance to moisture is vital, and also for use in biomedical devices, thanks to their biocompatibility.“

Here’s a link to and a citation for the paper,

Nanocellulose-short peptide self-assembly for improved mechanical strength and barrier performance by Alessandro Marchetti, Elisa Marelli, Greta Bergamaschi, Panu Lahtinen, Arja Paananen, Markus Linder, Claudia Pigliacelli and Pierangelo Metrangolo.. J. Mater. Chem. B, 2024,12, 9229-9237 DOI: 10.1039/D4TB01359J First published online: 19 Aug 2024

This paper is open access.