Thursday, August 21, 2025

How Moscow is reinventing its influence machine across Africa

Russian operatives are using new tactics to expand Moscow’s reach in Africa, two years after the death of Wagner boss Yevgeny Prigozhin. An investigation led by RFI and the monitoring group All Eyes on Wagner shows influence campaigns remain active from Angola to Chad.


Issued on: 19/08/2025 -  RFI

People dressed in military fatigues outside Wagner's headquarters in Saint Petersburg AFP - OLGA MALTSEVA

The findings, published with All Eyes on Wagner, reveal how Russia is reshaping its methods while keeping a strong presence across the continent.

On 7 August, two Russian nationals were arrested in the Angolan capital Luanda after violent protests over soaring fuel prices. They face charges including criminal conspiracy, document forgery, terrorism and terror financing.

Angolan authorities said the pair had set up a network of propaganda and disinformation designed to stir unrest and bankroll the demonstrations.

The arrests shed light on Moscow’s evolving toolkit in Africa.

One of the men, Lev Lakshtanov, is accused of masterminding the operation, RFI journalist Carol Valade said.


Operative in 'cultural diplomacy'

At 64, Lakshtanov has a long track record in the world of Russian soft power. He founded Farol, a cultural NGO for Portuguese-speaking countries, backed by Rossotrudnichestvo – the state agency for cultural diplomacy created under former president Dmitry Medvedev.

Plans were under way to open a Russian cultural centre in Luanda this year.

After spending time in Brazil, Lakshtanov wound up his activities in Russia around the time of the 2022 invasion of Ukraine. He later appeared in the United Arab Emirates before quietly settling in Angola on a tourist visa.

With his associate Igor Racthin, he moved into Luanda’s Gamek district. The pair posed as journalists, sought contacts with opposition figures, and reached out to Buka Tanda, a Russian speaker and senior member of the youth wing of UNITA, Angola’s main opposition party.

They told Tanda they were preparing a documentary and wanted to set up a cultural centre. He introduced them to his cousin, a journalist at state TV.

Soon the group was running paid interviews with politicians and commissioning opinion polls on perceptions of Russia – until their arrest on charges of orchestrating fuel protests.

Former Wagner media operative lifts the lid on Russian disinformation in CAR
Echoes of Chad

The case mirrors events in Chad a year earlier. In September 2024, three Russians and a Belarusian were arrested in N’Djamena.

Among them were Maksim Shugaley and Samir Seyfan, both long linked to Wagner’s African influence operations.

The group posed as investors, rented property, cultivated political contacts and recruited Russian-speaking Chadians. Two presented themselves as journalists, offering training and funding to reporters – then asking them to publish pro-Russian articles for cash.

They were detained during the inauguration of a Russian cultural centre in the capital, also set up under Rossotrudnichestvo.

From Wagner to Africa Corps

These cases show how Moscow’s strategy has shifted. “They are now more discreet but busier than ever, expanding and becoming increasingly professional,” said Lou Osborn, of All Eyes on Wagner.

The operations now run under the umbrella of the African Initiative, closely linked to Africa Corps – the Kremlin’s new command structure bringing Wagner’s former military assets under state control.

A wider network of private actors and consultants, many tied to Wagner or Russian intelligence in the past, is also active. Angolan police and Western officials refer to this circle as “Africa Politology”.

The findings come five years after the 18 August 2020 coup in Mali, which ended decades of French influence and brought the country into Russia’s orbit.

Since then, Wagner’s troops in Mali have been replaced by Africa Corps, while Moscow has signed multiple trade and nuclear energy deals with Bamako.
Spain's sees worst wildfire season since 1994 with 382,000 hectares burned so far in 2025

Copyright Pablo García / AP

By Javier Iniguez De Onzono & Euronews en español
Published on 21/08/2025 -

The European Forest Fire Information System (EFFIS) calculate that 380,000 hectares have burned in Spain so far this year, while the fight against the flames continues.

All the ingredients came together to create the perfect storm: a particularly dry spring in western Spain, followed by a heatwave that wiped out any remaining moisture in dense, dry ground-level vegetation. Add to that a lack of forest management and limited resources, something fire brigades across the affected autonomous communities have repeatedly warned about.

This combination has resulted in the most severe wave of summer wildfires Spain has seen since 1994, when 437,602 hectares burned, according to data from the Ministry of the Environment.

The European Forest Fire Information System (EFFIS), part of the EU’s Copernicus programme, estimates that 382,607 hectares have burned in Spain this year across 228 fires, a figure that continues to rise as fires rage across Galicia, Asturias, Castilla y León, and Extremadura. These regions, with the exception of Extremadura, are among the oldest and most depopulated in the country.

Depopulation also impacts forest upkeep. Traditional practices like extensive livestock grazing, which once naturally cleaned up the forest during the winter and spring, have largely disappeared.

Of the 10 most destructive wildfires this century in Spain, five have occurred in just the last 15 days of August this year: A Rúa in Orense (44,424 hectares), Uña de Quintana in Zamora (40,781), Benuza in León (32,596), Manzaneda (28,485) and Oímbra (28,485), also in the region of Orense.

What makes this wave of fires especially concerning is that, while the total number of large wildfires (those over 500 hectares) isn't unusually high, they are spreading much more easily due to weather conditions. In 2025, Spain has so far had 52 large fires and we only have to go back to 2022 to exceed that figure.

Across the European Union as a whole, 899,400 hectares of forest have already been burnt, with Slovakia reaching 10 times its historical average for this time of year and Cyprus seven times.

Sánchez to declare first emergency zones

Speaking from the advanced command post in La Granja, Cáceres, Prime Minister Pedro Sánchez announced that the first areas affected by the fires will be officially declared emergency zones next week.

"There are still difficult hours ahead, let's not get complacent," he said alongside the president of Extremadura, Maria Guardiola.

Sánchez emphasised that the climate emergency is worsening every year and reiterated the need for a national pact to address the growing frequency of extreme weather events caused by rising temperatures. He plans to present a legislative proposal in September to the scientific community, trade unions, and relevant institutions.
Latest updates on Spain’s wildfire crisis

Three of the five people injured in the Castilla y León fires remain in critical condition. The death toll stands at four - three volunteers and one officer from Soria, who was assigned to help in León and died when his machinery overturned during firefighting operations.

The fire in A Rúa or Larouco (Ourense) has now burned 44,424 hectares, surpassing Chandrexa de Queixa to become the largest wildfire in Galicia's recorded history, and the largest in Spain so far this century.

A major fire is threatening the León side of the Picos de Europa, putting communities in Tierra de la Reina and Valle de Valdeón on edge. In the latter, 775 residents from 11 towns have been evacuated. This area is part of a historic national park crucial to the biodiversity of the Cantabrian Mountains.

According to the Ministry of the Interior, the Guardia Civil and National Police have evacuated 31,130 people across the country. Authorities have also arrested 31 individuals and placed 92 under investigation for their suspected roles in starting the fires.

Spanish farmers step in as first responders to fight remote wildfires


Spain is battling a wave of wildfires that have claimed four lives this summer. In the north-west, in regions renowned for their lush landscapes and picturesque villages, farmers and residents are trying to save homes and land that firefighters cannot reach.


Issued on: 20/08/2025 - RFI

Locals deal with the effects of a forest fire in Santa Baia De Montes, northwest Spain, 14 August 2025. AP - Lalo R. Villar

A record 3,400 square kilometres – about the size of Moldova – has been destroyed by wildfires in Spain this year, the European Forest Fire Information System said.

Thousands of firefighters, backed by soldiers and water-bombing aircraft, have been battling more than 20 major blazes across the west of the country this week.

The fires, now in their second week, are concentrated in Castile and Leon, Galicia and Extremadura. Thousands of people have been forced to flee.

In some isolated villages, residents are defending their homes themselves. Surrounded by thick vegetation and perched on hillsides, these hamlets have been hit especially hard.

Raquel Fernández, who lives in Montederramo, Galicia, told RFI: "Every day, new fires appear. The fires are so big that they end up merging together. It's all mountains, and there aren't enough resources [for firefighters] to be everywhere. The people who are saving us here are the local farmers with their tractors and water tanks."

Across the region, farmers are trying to save the most isolated houses – including their own.

In Guimarei, south of Ourense, as the flames approach, Martín Pérez fills his water tank.

"My farm burned down two days ago, over there. A calf farm. And now I'm trying to save my house. Yesterday we saved my sister's farm, and we've been there for days. It's hell. It's absolute hell. I'm devastated, absolutely devastated. But we have to keep fighting, that's the way it is."

Anger with authorities


In Mogainza, Eloi Fernandez, a livestock farmer, has been battling the flames for a week.

He says he is angry with the authorities for not allowing farmers to clear the forests, which he believes could have slowed the spread of the fires.

"They ban everything. They ban making new paths, controlled burning, cutting wood for heating in winter... Everything, everything is banned. They call it a 'nature network'. Nature network... what nature do we have left? How are they protecting it? It makes no sense, they don't know what they're doing."

Other residents have voiced their anger at what they regard as poor preparation and limited resources.

"No one’s shown up here, nobody," Patricia Vila told AFPTV in the village of Vilamartin de Valdeorras in Ourense. "Not a single damn helicopter, not one plane, has come to drop water and cool things down a bit."

France, Italy, Slovakia and the Netherlands have sent firefighting aircraft to help, but the size and severity of the fires and the intensity of the smoke are making "airborne action difficult," Spanish Defence Minister Margarita Robles told television channel TVE.

Fernandez is worried for the future of these hamlets, which are already suffering from depopulation.

"It's all going to die out. We in the hamlets are doomed, they're going to be abandoned," he said. "There are only three or four young people left, and we're taking a real beating."

Despite the risks, locals continue to fight tirelessly against the fires, as the Spanish authorities announce that they will release aid for farmers who have lost everything.

(with newswires, and partially adapted from the this report n French.)
France rejects Netanyahu’s antisemitism claim over recognition of Palestine

France has defended its record on combating antisemitism after Israel's Benjamin Netanyahu accused Emmanuel Macron of emboldening hate attacks against Jews by pledging to recognise a Palestinian state.


Issued on: 20/08/2025 - RFI

Israeli Prime Minister Benjamin Netanyahu attends a joint press conference with French President Emmanuel Macron in Jerusalem, 24 October 2023. via REUTERS - POOL

France has hit back with unusual force after Israeli Prime Minister Benjamin Netanyahu accused President Emmanuel Macron of stoking antisemitism, as Paris prepares to recognise a Palestinian state next month.

The row – already simmering since Macron’s announcement in July – burst into open confrontation on Tuesday when Netanyahu wrote to the French leader warning that antisemitism had “surged” in France since his decision.

He claimed that recognition of Palestinian statehood would “pour fuel on this antisemitic fire” and reward Hamas, while endangering France’s own Jewish community.

France to recognise Palestinian statehood, defying US-Israel backlash
Netanyahu's accusations 'erroneous'

The Élysée’s response was swift and sharp. Netanyahu’s charge, officials said, was “abject” and “erroneous”. In a statement, the presidency insisted: “This is a time for seriousness and responsibility, not for conflation and manipulation.”

Far from tolerating antisemitism, Paris underlined, France “protects and will always protect its Jewish citizens”.

Macron’s office pointed out that since the Hamas attacks of 7 October 2023, his government has ordered “the strongest action” against antisemitic crimes. Violence against French Jews, it added, is “intolerable”.

Macron’s minister for Europe, Benjamin Haddad, was equally forthright. “France has no lessons to learn in the fight against antisemitism,” he declared, warning against exploiting “an issue which is poisoning our European societies”.

A swastika and the words "Shoa blabla" pictured on the stele of the "Jardin du Souvenir" (Garden of Memories) after antisemitic graffiti was discovered in the Champagne-au-Mont-d'Or cemetery on February 20, 2019. AFP - JEFF PACHOUD

Spike in antisemitic acts

France is home to Europe’s largest Jewish community, and the government has faced rising numbers of reported antisemitic acts in recent years – jumping from 436 in 2022 to 1,676 in 2023, before dipping slightly last year. Paris argues this makes its vigilance and record of action beyond question.

The latest diplomatic spat stems from Macron’s decision to recognise a Palestinian state at the UN in September.

France – a longstanding supporter of the two-state solution – says the step is meant to push back against Hamas and revive the prospects of peace.

More than 145 UN members have already recognised Palestinian statehood or plan to do so.

Reaction from Ramallah


In Ramallah, the Palestinian Authority welco med France’s stance and strongly condemned Netanyahu’s claims.

Its foreign ministry said his accusations were “unjustified and hostile to peace”, dismissing what it called the “old record” of conflating criticism of Israel with antisemitism. “No one is fooled,” the ministry added.

The row has unfolded against a wider backdrop of diplomatic tension. Netanyahu on Tuesday also turned his ire on Australia, branding Prime Minister Anthony Albanese “a weak politician who betrayed Israel and abandoned Australia’s Jews” after Canberra announced it too would recognise a Palestinian state.

That dispute has already seen tit-for-tat visa cancellations between the two countries.

For France, however, the priority is to ensure that its recognition of Palestinian statehood is not misconstrued as hostility towards Jews at home or abroad. Officials insist the move is in line with decades of French diplomacy, not a departure from it.
Movement calls for September shutdown across France to protest budget cuts

The movement ‘Bloquons tout’ ('Let's block everything') emerged in France in July, and is calling for a nationwide shutdown on 10 September to oppose the austerity measures announced by Prime Minister François Bayrou. But who is behind this new collective?


Issued on: 21/08/2025 - 12:03
3 minReading time
A protestor attends a demonstration in Paris on the sixth anniversary of the Yellow Vests movement, 16 November, 2024. AFP - IAN LANGSDON


"On 10 September we're not paying, we're not consuming and we're not working." This is the message disseminated online by Bloquons tout.

These posts emerged last month, in the wake of the budget cuts announced by Bayrou.

The stated aim is to bring France to a standstill on 10 September. But while the slogan has been adopted by thousands of people across social media, the origins of this grassroots movement are unclear – as are its demands.

French PM unveils radical plan to tackle ‘deadly danger’ of national debt
Yellow Vests links

A group called Les Essentiels, which has links to far-right and conspiracy theorist circles, was the first to posit the date of 10 September, in a video posted on TikTok on 14 July, one day before Bayrou's speech.

In a video created using artificial intelligence, a voice can be heard saying that this date will not be "just a hashtag that will disappear in three days".

The call was quickly relayed by former figures from the Yellow Vests movement, with the vast majority of activity taking place via Facebook and the Telegram messaging service.

In addition, Bloquons tout organises small local meetings of around a dozen people to discuss their demands and raise public awareness of the movement.

A website called Bloquons tout now seems to be at the core of the movement, bringing together the largest number of internet users. Its Telegram channel has more than 7,000 subscribers.

French MPs unanimously vote to publish Yellow Vests' 2019 public grievance log books

Two of them, both former members of the Yellow Vests, agreed to speak to RFI.

Nicolas, a civil servant who describes himself as apolitical, acknowledges that he doesn't "feel like something is about to happen right away", but says he doesn't believe that means there won't be any protests on 10 September.

Patrick, a construction worker and another former Yellow Vest protester, says he will definitely take part in the blockade on 10 September.

"The people have had enough. 'Let's block everything' means demonstrations, blocking supermarkets and petrol stations, just like we Yellow Vests used to do," he says.
Political divide

Within the French political class, only one party has declared its support for the movement – the far-left France Unbowed party, led by Jean-Luc Mélenchon.

In an opinion piece published on Saturday by newspaper La Tribune Dimanche, he wrote: "We call on all those who share our principles and our determination to put an end to the Bayrou government to immediately join the local groups organising this mobilisation and do everything in their power to ensure its success."

The leader of the Greens, Marine Tondelier, in an interview with the newspaper Libération on Wednesday also called for support for the 10 September shutdown.

However, she warned against political parties co-opting the movement, urging them to "stay in their lane" and not to "exploit the struggle".

"I say this to all parties: there is no question of spoiling everything by organising a competition to see who can wave the most flags or making protesters feel uncomfortable because they feel they are following in the footsteps of one presidential candidate or another," she stressed.

She told French news agency AFP: "The [Greens] will be involved in all initiatives," but added that the ideal scenario would be "to have as many political parties and as many trade unions, environmental and social organisations as possible calling for a massive mobilisation that completely transcends the usual political divisions".

The Socialist Party and the Communist Party have also pledged their support for the 10 September mobilisation.

Communist Party spokesman Léon Deffontaines said: "We will support the movement and play an active role." He added that his party calls for "participation in all demonstrations against the Bayrou project, including on 10 September".

Meanwhile, Socialist Party secretary-general Pierre Jouvet said: "We are watching this initiative with great interest. The motivations and methods are still quite vague at this stage, but we understand the exasperation behind this movement."

French PM turns to YouTube to sell budget cuts and calm public anger

These expressions of support have been criticised by the far-right National Rally party, which views the movement as the work of the far left.

At the government level, the response has been limited to stating that it remains attentive to citizen mobilisation, regardless of what form it takes.

Bloquons tout itself claims to be apolitical.

With regard to whether trade unions will participate in the called-for 10 September shutdown, while many have already called for a strike in the first weeks of September, there has been no indication as yet that they will officially join the emerging movement.

Data-driven designs to improve prosthetic legs


Tech provides personalized design using data from other fittings and scan of residual limb




Peer-Reviewed Publication

University of Southampton

Data-driven socket design 

image: 

The first Radii Devices technology trial socket (left), definitive socket (middle) and full prosthetic limb (right).

view more 

Credit: Dr Jenny Bramley / Radii Devices Ltd.






Researchers have developed a new, data-driven way of fitting prosthetic legs which could lead to better fitting prosthetics, in less time and at a lower cost.

The technology has been developed by Radii Devices and the University of Southampton, and the results of an NHS trial have been published today [22 August 2025] in JMIR Rehabilitation and Assistive Technology.

The study shows that below-the-knee prosthetic limbs designed using the new approach were as comfortable on average as those created by highly skilled prosthetists, but with more consistent results. Crucially, the new method generates a basic design instantly.

Finding the right fit

The team behind the software hope that data-driven ‘socket’ designs – the connection between the person and their prosthetic – will reduce the time, number of iterations and number of appointments it takes to arrive at a prosthetic limb the patient is comfortable with. This would not only improve patients’ experience but could also help to clear waiting lists.

Prosthetic sockets are personalised to make sure the prosthetic is comfortable, functional, and safe to walk on. The socket bears the person’s whole body weight and dynamic forces when walking, so it needs to be carefully balanced to distribute pressure without damaging limb tissue or creating discomfort.

Traditionally, a prosthetist makes a plaster cast of the leg and reshapes it to produce a socket which achieves the right balance, producing trial versions before settling on a definitive one. Today, many prosthetists use CAD (computer-aided design) software in a similar way. Importantly, this creates a digital record of the design process, which the team were able to utilise.

Using data to arrive at a personalised design

Radii Devices Ltd, a spin-out company from the University of Southampton, has developed software which draws on data from previous prosthetic socket designs to generate recommendations for the most comfortable socket shape using a 3D scan of the patient’s residual limb.

Dr Joshua Steer, Founder and CEO of Radii Devices and a co-author of the study, explains: “By analysing hundreds of previous prosthetic designs, we’ve been able to identify trends between different patient characteristics, such as the shape and size of the residual limb, and successful socket shapes.

“We can then scan a new patient’s residual limb and generate a personalised design recommendation based on features that have been successful for similar patients in the past.”

To test the effectiveness of the data-driven socket designs, the team carried out a study with patients from three NHS prosthetic rehabilitation centres. Seventeen patients were given a trial socket designed by a prosthetist and one designed using the new method. They were then asked to compare the comfort of the sockets, giving them a score out of ten, and interviewed about their experience of socket fitting.

The study found there was no difference in the comfort scores on average, and less variation in comfort in the data-driven socket designs. Several participants preferred the fit of the data-driven socket design when asked for feedback, and had it turned into their definitive prosthetic.

Working with prosthetists

The design recommendations aren’t intended to be used on their own in clinical practice. Instead, the team envision prosthetists working with the technology to further enhance the patient experience.

Alex Dickinson, Professor of Prosthetics Engineering at the University of Southampton, helped to develop the new method and the evidence base behind it. He said: “3D scans can tell us a lot about the shape of the residual limb from the outside, but they don’t tell us what is going on under the skin. Only a highly skilled prosthetist can identify things like bone spurs and neuromas, and know how to tweak designs to avoid causing pain or damage at these sensitive areas.

“We developed the data-driven socket design approach to save prosthetists’ time by giving them a solid base to work from so they can use their expertise where it is most valuable, in making precise adaptations tailored to their patients’ specific needs. The method effectively helps prosthetists to learn from each other.”

Nearly 100 people have now had a prosthetic leg designed this way, across multiple centres in the UK and the USA.

The project team included physiotherapists, health scientists, and software engineers.

Maggie Donovan-Hall, Professor of Psychology in Prosthetics and Orthotics at the University of Southampton and co-author of the study, said: “This study was designed to test the ‘worst-case’ use of data-driven socket designs, with no additional input from prosthetists.  

“The fact they performed so well in these circumstances is both surprising and encouraging, but the real value of this tool is to give the prosthetist a starting design quickly, meaning they can spend much more of their time working with their patient on perfecting the more complex, personalised aspects of the design. This is what prosthetists spend years learning and is most crucial to their patients’ experience.”

The final stage of this study is now underway, where the software interface is being developed with clinicians to provide them the most effective way to incorporate data-driven socket designs into their practice.

Evidence-Generated Sockets for Transtibial Prosthetic Limbs Compared With Conventional Computer-Aided Designs: A Multiple-Methods Study From the Patient’s Perspective is published in JMIR Rehabilitation and Assistive Technology.

The work was supported by Innovate UK, the University of Southampton’s Institute for Life Sciences, Orthopaedic Research UK, and the Royal Academy of Engineering.

Ends

Contact

Steve Williams, Media Manager, University of Southampton, press@soton.ac.uk or 023 8059 3212.

Notes for editors

  1. Evidence-Generated Sockets for Transtibial Prosthetic Limbs Compared With Conventional Computer-Aided Designs: A Multiple-Methods Study From the Patient’s Perspective will be published in JMIR Rehabilitation and Assistive Technology. An advanced copy is available on request.
  2. COI declaration: Professor Alex Dickinson and Professor Pete Worsley are coauthors of the paper and stakeholders in Radii Devices. Dr Jenny Bramley, Dr Josh Steer and Dr Harry Rossides are coauthors on the paper and work for Radii Devices.
  3. For interviews please contact Steve Williams, Media Manager, University of Southampton press@soton.ac.uk or 023 8059 3212.
  4. Images are available to download here: https://safesend.soton.ac.uk/pickup?claimID=hKUif4JMu7C3Df9e&claimPasscode=THtTQvtjkUAkn2t7

Additional information

The University of Southampton drives original thinking, turns knowledge into action and impact, and creates solutions to the world’s challenges. We are among the top 100 institutions globally (QS World University Rankings 2023). Our academics are leaders in their fields, forging links with high-profile international businesses and organisations, and inspiring a 22,000-strong community of exceptional students, from over 135 countries worldwide. Through our high-quality education, the University helps students on a journey of discovery to realise their potential and join our global network of over 200,000 alumni. www.southampton.ac.uk

www.southampton.ac.uk/news/contact-press-team.page

Follow us on X: https://twitter.com/UoSMedia


Full prosthetic limb being worn by participant.

Credit

Dr Jenny Bramley / Radii Devices Ltd.

Prosthetists using the data-driven design software

Credit

Radii Devices Ltd.

 

More hydrogen, more ammonia, more fertilizer, all using less energy





RIKEN

Mechanochemical reactions doubled hydrogen storage 

image: 

Barium titanate oxyhydride was produced from barium titanate via standard topochemical reactions (using heat) and the new mechanochemical reactions (by grinding). The mechanochemical reaction doubled the amount of hydrogen that could be stored in the perovskite from 17% to 34%.

view more 

Credit: RIKEN



Researchers led by Genki Kobayashi at the RIKEN Pioneering Research Institute (PRI) in Japan recently discovered a way to max out the amount of hydrogen that can be stored in perovskite crystalline powder. The trick is to introduce the hydrogen into the perovskite lattice structure using mechanochemistry – chemical reactions that occur by physically grinding and mixing compounds together. This process also affects the crystalline structure of the powder, making it an even better catalyst for producing ammonia. Because this process requires less energy than traditional non-mechanical methods, the discovery is eco-friendly and good for future sustainability. The findings were reported in the Journal of the American Chemical Society.

Scientists are currently striving to store hydrogen more efficiently for a variety of reasons, and one of the best mediums is a type of crystal called perovskite. Chemical reactions can be used to replace the oxygen ions in the crystalline powder with hydride (H-), turning it into a perovskite oxyhydride. Once hydrogen is stored in this way, it is easily transportable and can be used as a catalyst to create ammonia. As ammonia is the main ingredient in most fertilizers, is needed for many plastics, and is itself a type of hydrogen fuel, the perovskite oxyhydride power has numerous potential benefits. However, whether they use high temperature or high pressure, currently known chemical reactions only replace about 17% of the oxygen with hydride, meaning that the powder has the potential to store much more hydrogen than is currently possible.

The team led by Chief Scientist Kobayashi is researching ways to increase the hydrogen saturation limit from 17% and get more hydrogen into perovskite powder. Rather than using high temperatures or high-pressure techniques, they have been experimenting with physical mechanochemical reactions, which work well at room temperature and make them a more attractive option for maintaining the environment. Now, they have found a way to greatly increase hydrogen saturation, with twice as many oxygen ions in the crystalline structure being replaced by hydrides. This means that the new method virtually doubles the hydrogen-storage capacity of perovskite powder.

In the experiments, the researchers produced barium titanate oxyhydride in two ways: mechanochemically and topochemically. They found that the mechanochemical way–physically grinding and mixing the ingredients–had two advantages over the standard high-temperature method. First, the lattice structure of the crystalline powder contained more hydride. Second, even when taking pieces of each with the same number of hydrides, the mechanochemically produced version was a better catalyst; more ammonia was produced. Analysis showed that this was because the grinding process induced beneficial deformations in the lattice that high heat could not.

“This advancement is good news for environmental sustainability and will eventually help us achieve a real hydrogen-based economy,” says Kobayashi. In the short term, he says that their new findings provide valuable material design guidelines that will be useful in the development of new functional materials that contain hydride ions.

The new hydrogen saturation limit of 34% is likely the maximum that can be achieved using barium titanate, but even better results might be possible starting with another perovskite. “In the long term,” Kobayashi says, “our mechanochemical approach is expected to yield even better catalysts for ammonia synthesis, as well as materials for electrochemical devices such as fuel cells, a field in which the Kobayashi Laboratory specializes.”

 

Yogurt and hot spring bathing show a promising combination for gut health



Researchers find that hot spring bathing enhanced the positive effects of yogurt on defecation status




Kyushu University

The Umi Jigoku onsen in Beppu, Japan 

image: 

The Umi Jigoku onsen (hot spring) is one of the stunning onsens you can see at Beppu City. While this onsen is far too hot to take a dip in, Beppu is renowned for its numerous onsens and the purported health benefits it provides.

view more 

Credit: Kyushu University





Fukuoka, Japan— Researchers at Kyushu University have demonstrated that yogurt intake increases the diversity of gut microbiota and alters its composition. Furthermore, bathing in chloride hot springs after yogurt intake was found to improve defecation status more than yogurt alone. These findings suggest that combining two lifestyle interventions—yogurt intake and hot spring bathing—may contribute to better health, highlighting their potential application for preventive medicine. The study was published in the journal Frontiers in Nutrition.

Maintaining a healthy gut environment is vital for overall health, as it plays a key role in regulating digestion, immune responses, and even neurological function. Yogurt, which contains prebiotic microorganisms such as lactic acid bacteria and bifidobacteria, have been known to modulate the gut microbiota and provide a range of health benefits.

In this context, researchers at Kyushu University focused on Japanese hot springs, also known as Onsen. “We have previously reported the beneficial effects of onsen bathing on the gut microbiota. However, little has been known about how the combination of diet and onsen bathing influences health.” says Professor Shunsuke Managi of Kyushu University’s Urban Institute who led the research. “Therefore, we collaborated with Beppu City here in Kyushu, a region well known for its onsen, to investigate the effects of onsen bathing after yogurt intake.”

This study enrolled 47 healthy adult men and women who had not bathed in onsens within 14 days prior to the start of the trial. The participants were then randomly assigned to one of three groups: a control group, a yogurt group and a yogurt plus onsen group.

The control group received no intervention, while the yogurt group consumed 180 g of low-sugar yogurt containing Lactobacillus bulgaricus and Streptococcus thermophilus after dinner daily. In addition to this, the yogurt plus onsen group bathed in Beppu's chloride spring for more than 15 minutes at least once every two days. Before and after the four-week intervention period, gut microbiota surveys were conducted using stool samples, and a questionnaire on defecation status containing 14 items which includes evaluating stool frequency, stool consistency, the sensation of incomplete evacuation, and the use of laxatives was administered.

The results revealed a significant increase in gut microbiota diversity in the yogurt group, accompanied by changes in the relative abundance of multiple bacterial species. Notably, these microbial changes were not observed in either the control group or the yogurt plus onsen group. However, both the yogurt group and the yogurt plus onsen group demonstrated significant improvements in defecation status scores, with the latter showing a more pronounced effect.

These findings suggest that yogurt intake may enhance gut microbial diversity, and that its combination with onsen bathing may exert an additive or synergistic effect to improve defecation status.

“Although the sample size is small, our findings suggest that combining two accessible lifestyle interventions—yogurt intake and onsen bathing—may offer enhanced health benefits, particularly by promoting gut microbiota diversity and improving defecation status in healthy adults,” explains Managi. “These results are especially relevant given the growing interest in non-pharmaceutical, lifestyle-based strategies for preventive health and wellness. Furthermore, this research may support the development of evidence-based wellness tourism, particularly in regions known for their onsen, by providing scientific validation for health-oriented travel and services.”

###

For more information about this research, see "Dietary and environmental modulation for the gut environment: yogurt promotes microbial diversity while chloride hot springs improve defecation status in healthy adults,"Jungmi Choi, Midori Takeda, and Shunsuke Managi” Frontiers in Nutrition, https://doi.org/10.3389/fnut.2025.1609102

About Kyushu University 
Founded in 1911, Kyushu University is one of Japan's leading research-oriented institutes of higher education, consistently ranking as one of the top ten Japanese universities in the Times Higher Education World University Rankings and the QS World Rankings. The university is one of the seven national universities in Japan, located in Fukuoka, on the island of Kyushu—the most southwestern of Japan’s four main islands with a population and land size slightly larger than Belgium. Kyushu U’s multiple campuses—home to around 19,000 students and 8000 faculty and staff—are located around Fukuoka City, a coastal metropolis that is frequently ranked among the world's most livable cities and historically known as Japan's gateway to Asia. Through its VISION 2030, Kyushu U will “drive social change with integrative knowledge.” By fusing the spectrum of knowledge, from the humanities and arts to engineering and medical sciences, Kyushu U will strengthen its research in the key areas of decarbonization, medicine and health, and environment and food, to tackle society’s most pressing issues.