vendredi 31 mars 2023
IA : Elon Musk met en garde contre la montée des intelligences artificielles
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Pour Ray Kurzweil, ancien de Google, l’être humain va atteindre la « singularité technologique » dans 20 ans
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La météo de ce dimanche 2 avril donnerait la tendance de l'été
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Volkswagen dévoile sa voiture citadine électrique à moins de 25 000 euros
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Pour la première fois, ce champignon qui s'attaque aux arbres a infecté un humain
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jeudi 30 mars 2023
Des patients contractent le botulisme après des injections de botox douteuses
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Elon Musk et plus de 1 000 experts lancent l’alerte sur les IA générative comme ChatGPT
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Fausses couches : découverte d'une particularité fréquente chez les embryons (La Santé Sur Écoute # 32)
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Interview : l'asso Tête en l'Air aide les enfants opérés du cerveau (épisode spécial Podcasthon)
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Acidification des océans : nous ne sommes pas prêts pour les conséquences
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Un médicament contre Alzheimer engendre aussi une atrophie du cerveau
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Vie et mort des points chauds : ce que nous enseignent ces volcans d’Australie
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mercredi 29 mars 2023
Le sursaut gamma « le plus brillant de tous les temps » disséqué par les astronomes
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Le sursaut gamma « le plus brillant de tous les temps » a aveuglé les satellites !
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Recevez le Mag' Futura en cadeau pour tout abonnement annuel sur Patreon !
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Le taxi volant français Atea est prêt à décoller pour des vols à 200 km/h
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Les cabines de bronzage sont dangereuses mais toujours utilisées
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Les électrocarburants, ou e-fuels, sont-ils une bonne ou une mauvaise idée ?
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mardi 28 mars 2023
Réglo Mobile régale avec son forfait 40 Go à 7,95 €
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L'IA scrute les arcanes mystérieux des premières étoiles
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Le perroquet gris du Gabon discute avec les humains en faisant des phrases !
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Chatgpt recommande les restaurants maintenant
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Un puissant séisme provoqué par l’exploitation des énergies fossiles
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lundi 27 mars 2023
Où se cache la procrastination dans le cerveau et quand survient-elle ?
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Le site de l'Assemblée nationale mis K.-O. par des hackers russes
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Colibri, Larinae : l'armée française se lance dans les drones de combat low-cost
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Décrypter les éruptions volcaniques avec les éclipses de Lune
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Midjourney : quand l'IA transforme vos idées en images
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ChatGPT a un problème avec la désinformation
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Un constituant de l'ARN découvert sur l'astéroïde Ryugu !
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dimanche 26 mars 2023
Reportage sur les femmes ukrainiennes qui se forment au pilotage de drones de combats
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Promo Anniversaire Aliexpress : top 3 des produits à ne pas rater pour l’univers maison
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Une gigantesque collecte de déchets à travers l'Europe ce week-end
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Bon plan : notre sélection des meilleures offres tech pour l'anniversaire Aliexpress
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Utiliser son portable en avion perturbe les systèmes de communication, vrai ou faux ?
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Le gouvernement sommé de prendre des mesures pour protéger les dauphins
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samedi 25 mars 2023
Patient bizarre : cette maladie rare rend la peau élastique
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L'astronaute Jean-Jacques Favier, premier scientifique français à être allé dans l’espace, rejoint les étoiles
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Les opérations de « réensauvagement » sont-elles efficaces ?
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JO 2024 : la Cnil s'inquiète pour la protection des données personnelles
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Jeûner trop longtemps ne serait pas bon pour le système immunitaire
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Comment discuter du réchauffement climatique avec des personnes réticentes ?
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Écouter sa musique préférée augmenterait l’efficacité de certains médicaments
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Une IA peut connaître le profil génétique d'une tumeur en 90 secondes
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vendredi 24 mars 2023
La vie est Belt car upcyclée
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L'Anses met en garde contre le surdosage en vitamine D chez les nourrissons
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Ce que révèle l'ADN prélevé dans les cheveux de Beethoven sur sa mort
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Les nitrates auraient été les boosters de la vie terrestre !
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Des restes humains découverts pour la première fois dans un « mustatil » de 7 000 ans
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L’heure d’été nous fait-elle consommer moins d’énergie ?
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jeudi 23 mars 2023
Pourquoi OpenAI a dû désactiver ChatGPT en urgence ?
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Des clés USB explosives pour intimider des journalistes
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Nissan X-Trail e-Power : explorez la gamme et ses tarifs
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Le sport peut-il vraiment être plus durable ? - Paul Guinard (NOLT) [REDIFF]
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Voici les signes avant-coureurs de l’effondrement de l’Antarctique
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mercredi 22 mars 2023
Finalement, l’astéroïde de la Saint-Valentin 2046 ne devrait pas s’écraser sur la Terre
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Quel monde vous attend dans 10 ans, avec +1,5 °C de réchauffement ?
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Adobe aussi lance une Intelligence artificielle pour créer des images
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L'arrivée en France de la shigellose résistante aux antibiotiques inquiète l'Institut Pasteur
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Internet menacé d'extinction par le changement climatique [REDIFF]
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mardi 21 mars 2023
Acer dévoile un vélo électrique assister par une intelligence artificielle
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Microsoft booste Word, Excel et PowerPoint avec GPT-4
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Cette caméra nous dévoile le monde microscopique en 3D avec des résolutions du gigapixel !
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Dernières révélations scientifiques de l'impact de l’astéroïde Dimorphos par la sonde Dart
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La menace des astéroïdes serait sous-estimée, révèle une étude de la Nasa
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Le terminateur : une frontière habitable entre deux mondes hostiles ?
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lundi 20 mars 2023
GPT-4 est capable de mentir et de manipuler les humains, en voici la preuve
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Claude, le ChatGPT plus éthique
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How silicon, gold, copper help destroy covid-19 virus
Silicon, gold and copper, as well as electric fields, can be used to destroy the spike proteins of SARS-CoV-2, the virus that causes covid-19, according to new research.
“Coronaviruses have spike proteins on their periphery that allow them to penetrate host cells and cause infection and we have found these proteins become stuck to the surface of silicon, gold and copper through a reaction that forms a strong chemical bond,” Nadim Darwish, who led the research at Curtin University, said in a media statement.
“We believe these materials can be used to capture coronaviruses by being used in air filters, as a coating for benches, tables and walls or in the fabric of wipe cloths and face masks.”
In a paper published in the journal Chemical Science, Darwish and his colleagues explain that, in addition to the metals, coronaviruses could be detected and destroyed using electrical pulses.
“We discovered that electric current can pass through the spike protein and because of this, the protein can be electrically detected,” PhD candidate Essam Dief said.
In Dief’s view, this finding can be translated into applying a solution to a mouth or nose swab and testing it in a tiny electronic device able to electrically detect the proteins of the virus. This would provide instant, more sensitive and accurate covid testing.
In addition to the prior, by applying electrical pulses, the researchers found that the spike protein’s structure is changed and at a certain magnitude of the pulses, the protein is destroyed. This means that electric fields could deactivate coronaviruses.
“So, by incorporating materials such as copper or silicon in air filters, we can potentially capture and consequently stop the spread of the virus,” Dief said. “Also importantly, by incorporating electric fields through air filters, for example, we also expect this to deactivate the virus.”
For the researchers, this study is quite promising both fundamentally, because it enables a better understanding of the viruses in question, and from an applied perspective as it helps develop tools to fight the transmission of current and future coronaviruses.
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Une demi-journée avec l’IA de Midjourney V5
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Le jeûne prolongé serait néfaste pour le système immunitaire
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La carte SIM, c'est fini, place à l'iSIM dématérialisée !
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dimanche 19 mars 2023
Les dangers de la chirurgie esthétique « sauvage »
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Electrification of Canada’s heavy-duty vehicles may yield benefits earlier rather than later – report
A recent report by Deloitte Canada makes the case for decarbonizing commercial vehicles as a measure that is eventually less expensive than maintaining internal combustion vehicles and that has a greater impact on emissions reductions than doing so on passenger vehicles.
According to the firm, a commercial vehicle can emit up to 21 times more CO2 than a light-duty passenger vehicle.
“Electric vehicles are expected to play a significant role in enabling companies to decarbonize their commercial fleets and reduce emissions at a competitive cost,” the report reads. “According to the International Energy Agency’s projections, EVs will comprise nearly 100% of commercial vehicle sales by 2050 in a net-zero scenario—compared to just 0.1% in 2020.”
In the view of the experts at Deloitte, it is important for organizations looking to reduce their emissions to move quickly when it comes to electrification. They believe that operators that are already working to electrify their fleets are better positioned to capture an important competitive advantage—and more market share—as their business customers increasingly shift to more carbon-efficient commercial transport providers to reduce their Scope 3 emissions.
Switching to EVs is also seen as a way to shelter companies from fluctuating gas and diesel prices, particularly considering the impacts of geopolitical events such as the war in Ukraine.
Also, electricity is cheaper than diesel per gigajoule of energy across most of Canada, except in Ontario, New Brunswick, Nova Scotia, and Prince Edward Island.
The higher energy efficiency of EVs means they should be much cheaper to operate, even in jurisdictions with high electricity prices like Ontario or low fuel prices like Alberta.
Carbon tax
Savings connected to electrification are also related to the fact that Canada’s carbon tax is expected to continue to increase this decade, from $50 per tonne of CO2e in 2022 to $170 per tonne by 2030 (from 13 to 46 cents per litre). This means fuel prices are expected to rise more quickly than electricity prices over the same period.
“Organizations that are working to transform their fleet’s power source today will minimize the disruptive impacts of these regulatory changes on their businesses in the years to come,” the dossier notes.
The authors of the report do recognize that the transformation attached to electrification involves investing significant capital into vehicles and charging infrastructure. However, they do recommend that operators take advantage of the $3 billion in EV grants and incentives currently offered by Canada’s federal and provincial governments, particularly taking into account that these grants and incentives are both time-bound, expiring by 2027, and capped.
“Those who wait may find that the funds have been exhausted, requiring them to bear the full cost of their electrification efforts,” the dossier reads. “Taking early action also helps ensure that partnerships with EV manufacturers can be established to secure the vehicles and infrastructure required at a time when EV demand is outpacing supply. In addition, first movers can ally early with local utility companies to attain additional power supply that may be needed for on-site charging infrastructure.”
Maintenance
In addition to considerations around charging infrastructure, rethinking and redesigning fleet operations, routing, and networks to account for things such as charging times and how extreme temperatures affect the performance and durability of EV batteries, Deloitte suggests thinking about the costs of operating electric vehicles.
“EVs that require larger batteries to move large payloads or travel longer distances on a single charge cost significantly more than ICE vehicles; currently, a battery-electric class 8 truck can be up to four times more expensive than its diesel equivalent,” the dossier states. However, “as battery-electric technology costs are expected to decline, most class 8 commercial EVs are likely to reach TCO price parity by 2030.”
The report notes that heavy-duty industries looking into electrification should also keep in mind that maintenance costs for EV trucks are 30% to 40% lower than those for traditional trucks.

“EV maintenance costs are lower than those of internal combustion engine (ICE) vehicles, helped by the fact that an EV drivetrain contains around 20 moving parts—compared to more than 2,000 moving parts in a typical ICE drivetrain,” the document points out. “The total cost of ownership (TCO) for some EVs is already lower than ICE vehicles.”
Finally, the market analyst believes that technological improvements should contribute to lower capital costs and the TCO over time, particularly taking into account that battery prices have steadily declined as manufacturing processes have improved and new battery chemistries identified.
“According to BloombergNEF, average battery pack prices could drop to $100/kWh by 2024, which would put the TCO of many EV models on par with their ICE equivalents,” the report states. “In addition, improving battery energy density means that new EVs will require less battery power to travel the same distance as older EVs—which translates to fewer battery cells and lower vehicle prices.”
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La pratique du football expose les joueurs à un risque accru de démence
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America’s timeline for development of domestic battery metal supply chain may be unrealistic – research
By 2027, for an EV to be tax-credit eligible in the US, 80% of the market value of critical minerals in its battery must be extracted or processed domestically or by US free-trade partners (FTPs), Northwestern University researchers say.
In a commentary published in the journal Nature Sustainability, Jennifer Dunn and Jenna Trost wrote that while this goal – part of the 2022 Inflation Reduction Act – is well-intended, there are reasons to believe the mandate is unreachable and could create new problems.
According to Dunn and Trost, the 80%- target could be achievable for some types of batteries for plug-in hybrid vehicles, but meeting demand for fully electric vehicles with batteries that meet IRA criteria would be challenging. Instead, a mass-based target could avoid some of the challenges posed by a market-value target, such as pinning down a consistent market value for each mineral when market prices are volatile.
The researchers also concluded that the approach taken by the IRA discounts the environmental effects of mining, non-critical minerals supply, and definitions that avoid gamesmanship.
In their view, to meet the demands of the bill, a steep increase in domestic mining would be needed. This could pose environmental issues, including water pollution, in addition to creating greenhouse gas emissions from burning fuel to operate mining equipment.
Building mines also takes time. Permitting processes to protect the environment and worker safety can create delays and extend that timeline. Communities may also resist new mines because of the potential environmental impact. This means that establishing a domestic supply of minerals is unlikely to meet the IRA’s aggressive timeline.
“There’s a lot of interesting social and political dynamics. Some people don’t want new or expanded mines, and others welcome the economic activity and the opportunity to become more energy independent by building out a domestic minerals supply chain,” said Dunn, who is the director of the Center for Engineering Sustainability and Resilience. “It’s fascinating to watch how this is going to play out.”
She believes that much of the mineral supply chain will continue to be international. As a result, there’s also the issue of labour laws in countries that are not FTPs, raising the question of responsible sourcing.
The researcher pointed to Argentina as a case study. The South American nation is a non-FTP country that provided 59% of the 2,618 tons of lithium mineral the US imported in 2019. Argentina does not offer the labour and environmental protections the US requires of FTP partners, but any minerals acquired from the country would still count if they were processed domestically.
Dunn and Trost argue that guidance should be provided regarding what constitutes processing, and what are allowable sources for the minerals that would be processed in the US or an FTP.
“We have ostensibly good labor protections for miners, but that’s not the case everywhere. What are the ethical implications of using minerals from other places?” Dunn pointed out. “And then, are we going to be really serious about recycling? because we’re clearly not with plastics. We have to be really serious. Investment in battery recycling is growing, but it still needs to be larger.”
Market value target
Dunn and Trost also raised concerns about the use of a market value-based target.
A market value-based target can be met before all the critical minerals in a battery are acquired from a secure source such as the US or an FTP, depending on the battery chemistry.
The environmental effects of critical minerals acquisition are physically tied to the amount of mineral produced rather than its market value.
Market values fluctuate. The researchers noted that prices for cobalt and nickel, for example, have increased by about $13,000 and $4,000 per metric ton, respectively, since 2019.
Many non-critical minerals central to batteries are mainly produced outside the US, raising supply risks.
Instead, the authors suggested using a mass-based standard. Using a mass-based target, they wrote, would reduce uncertainty and hold all automakers to the same standard in the interpretation of market value.
“Given the fluctuations in mineral market values, using a mass-based target in the policy could improve its transparency but may not incentivize production of high-value minerals domestically, which is important for mineral security,” Dunn and Trost said.
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samedi 18 mars 2023
Les grandes anomalies du champ magnétique terrestre enfin expliquées ?
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Les bienfaits du thé matcha sur la dépression
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Et si les batteries devenaient simples à recycler ?
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On connaît l'origine de l'aile des dinosaures !
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John von Neumann. L'homme qui venait du futur
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Des enzymes pour recycler nos t-shirts ?
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vendredi 17 mars 2023
Surprise ! La température d'un amas de galaxies atteignait déjà un million de degrés il y a 11 milliards d'années
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Mining people: Alamos Gold, Flying Nickel, Rio Tinto
Changes in management:
Alamos Gold promoted Greg Fisher, senior VP of finance to CFO, effective May 1.
Centerra Gold appointed Paul Tomory as CEO, effective May 1.
Copper Mountain Mining announced Patrick Merrin as president and CEO effective April 24.
Lode Metals announced Jon Bey as president, CEO, and board member.
Pedro Resources appointed Albina Manaj as CFO.
Roscan Gold named Jun Cao as CFO.
Solstice Gold announced David Adamson as chair and interim CEO following Mike Timmins stepping down.
Visionary Gold hired Michael Page as chief geologist and promoted Sammy Gonzalez Buezo to exploration manager.
Board changes this week:
A.I.S. Resources appointed Andrew Neale as a director.
Filo Mining appointed Joyce Ngo and Peter J O’Callaghan to its board.
Flying Nickel Mining added Greg Hall to the board.
Nevada Vanadium Mining appointed Ron Espell to its board of directors.
Prospect Ridge Resources named Michael Michaud and Yan Ducharme as directors.
Rio Tinto appointed Dean Dalla Valle and Susan Lloyd-Hurwitz as non-executive directors, effective June 1.
Silver Bull Resources named William Matlack to the board.
United Lithium named Cathy Fitzgerald to the board.
Visionary Gold appointed David R. Miller to the board.
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Cro-magnon, victime de meurtre ? Une nouvelle enquête scientifique
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Hydrogen-based thermal power produced using aluminum scrap
Boston-based startup Found Energy announced that it has successfully produced 20 kW of continuous, hydrogen-based thermal power in an experimental reactor using 1 kilogram of low-grade aluminum scrap such as foil as a fuel source.
According to the company, the scrap is treated with a proprietary catalyst that causes it to liberate hydrogen particles contained in a water bath, which can either be burned for thermal energy or stored in a fuel cell.
Once the reaction is over and the heat and hydrogen dissipate, aluminum hydroxide is left behind. Aluminum hydroxide is a chemical precursor to alumina that primary smelters use to make pure aluminum metal.
The reactor, capable of producing electricity in the kilowatt range, is only the company’s initial offering. The plan in the third quarter is to begin testing a model capable of producing electricity in the megawatt range.
Found Energy hopes to market the low-emission power source to heavy industrial energy consumers such as aluminum smelters, long-haul trucking and ocean-going freighters, all fueled by oil-based products with more extensive carbon footprints.
The firm also expects ammonia producers for fertilizers – who typically use hydrogen extracted via steam methane reforming – to look into the new technology as it is an alternative solution capable of delivering hydrogen in a safer manner and with higher volumetric energy density.
With files from Argus Media.
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Deux experts décryptent des vidéos sur les troubles du sommeil sur TikTok
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Les traces d’un ancien glacier retrouvées près de l’équateur de Mars !
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jeudi 16 mars 2023
Certaines œuvres créées par IA peuvent être protégées par le droit d’auteur aux États-Unis
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Des roches faites de plastique découvertes sur l'île reculée de Trindade
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Norcat launches Canada-wide mining technology innovation competition
NORCAT, together with their technology partners, has launched the Mining Technology Innovation challenge, a Canada-wide competition for innovators to create 5G applications to enhance safety, productivity and operational improvements in the global mining industry.
As part of the challenge, start-ups and entrepreneurs from across Canada will develop and test technologies on the Rogers 5G wireless private network at the Rogers Technology Centre of Excellence at the NORCAT Underground Centre in Sudbury, Ont. These solutions, focused on safety, productivity, energy efficiency, and environmental impact, will also leverage edge technologies by Dell.
Applicants are asked to submit their proof-of-concept ideas by April 4. On April 21, finalists will be announced and invited to pitch their ideas to a panel of judges, including leaders from Rogers, Norcat and OVIN, as well as Dell, MICA, and leading Canadian mining companies, at a later date. Winners will be announced the first week of May.
Winners will receive up to C$100,000 worth of support, including C$25,000 in funding to develop their proof-of-concept within the Rogers technology centre for up to three months, with access to edge technologies by Dell as well as leverage the support of the OVIN northern regional technology development site to commercialize their solution. Throughout the three-month development period, winners will receive up to 100 hours of direct support from challenge partners, industry experts, and engineers.
“The Mining Technology Innovation challenge is an incredible opportunity for start-ups, entrepreneurs and problem solvers to continue developing innovative technological solutions for the mining sector, while strengthening Ontario’s end-to-end supply chain,” said Vic Fedeli, minister of economic development, job creation and trade.” Ontario has everything companies need to grow and thrive, and we are excited to see the made-in-Ontario solutions that will be developed through this challenge.”
“As the global mining industry continues to evolve, we have found that increased levels of collaboration, including challenge-based initiatives, have proven to be successful in unearthing fresh ideas and diverse perspectives,” said Norcat CEO Don Duval in a news release. “We are thrilled to partner with Rogers, Dell Technologies and MICA to further the acceleration, adoption and deployment of emerging technologies that have the potential to revolutionize the global mining industry.”
More about the competition is here.
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Découvrez la combinaison des astronautes d'Artemis III qui marcheront sur la Lune
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Fortescue, NREL partner to boost green hydrogen development
West Australian Fortescue Future Industries (FFI), a subsidiary of Fortescue Metals Group, and the US’ National Renewable Energy Laboratory have partnered to develop a green hydrogen research center in Colorado.
The initial collaboration will be three years, but ultimately FFI expects to invest $80 million over a decade in research projects with NREL.
“It is exciting to contemplate how NREL can assist FFI and Fortescue in achieving their very aggressive Scope 1, 2, and 3 carbon emission reduction goals and help them build their clean hydrogen business,” Bill Farris, NREL’s associate laboratory director for innovation, partnering and outreach, said in a media statement. “Over the next several years, we will work together on these goals and utilize a broad set of NREL capabilities ranging from energy systems integration and hydrogen fueling to PV and membrane materials and high-performance computing.”
Farris pointed out that the first FFI team members have arrived in Colorado and are getting settled in to collaborate with NREL on an initial set of projects, including an extensive R&D program for water electrolysis, in support of FFI’s electrolyzer manufacturing effort.
Other topics that are being explored are the use of hydrogen directly as a fuel or converted to sustainable fuels for applications like trucks, rail, ships, and aviation; blending hydrogen directly with natural gas in pipelines or used as a feedstock in processes to produce renewable natural gas; combining it with waste products such as carbon dioxide to form high-density liquid fuels and valuable chemicals; employing hydrogen to provide energy, heat, and chemical building blocks for industrial processes; and leveraging its capabilities as an energy storage medium, which is available even for long-duration seasonal storage, and can enable larger-scale deployment and use of renewable electricity.
The researchers will also have to address major challenges related to the cost, scale, durability, and manufacturability of green hydrogen.
Farris noted that NREL’s hydrogen research also supports the H2@Scale vision, the US Department of Energy’s vision for clean hydrogen to be a central component of a clean, sustainable, efficient, and economic energy system. This vision encompasses all aspects of hydrogen research: making it, moving it, storing it, and using it.
FFI leaders said they chose NREL in part because of the fertile ecosystem not only in the United States but particularly in Colorado. Alongside the NREL collaboration and establishment of its US center, FFI also intends to forge relationships with the Colorado School of Mines, University of Colorado, and Colorado State University, as well as other leading research labs and universities across the United States.
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Sky Tonight : test de l’application pour astronomes amateurs
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Les scinques se reconnaissent en tirant la langue
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mercredi 15 mars 2023
OpenAI annonce GPT-4, une IA multimodale et créative
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Le régime méditerranéen réduirait le risque de démence
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Researchers find efficient way to turn vegetable oil industry waste into power
Iran-based researchers have developed a novel and cost-effective anode catalyst that can improve and stabilize the power generation performance of microbial fuel cells (MFCs) treating vegetable oil industry wastewater.
In a paper published in the Journal of Chemical Technology and Biotechnology, the scientists explain that MFCs convert the chemical energy stored in organic matter in wastewater into electricity using bacteria as a catalyst. For years now, the team has been investigating how the modification of the electrodes can improve the performance of this technology.
“Electrode design is the greatest challenge in making MFCs a cost-effective and scalable technology. The anode of MFCs plays a vital role in the extracellular electron transfer between the electroactive bacteria and the solid electrode surface,” Hossein Jafari Mansoorian, corresponding author of the study, said in a media statement. “In this regard, it is of crucial importance to develop a novel anode material with synergistic effects between the properties of the anode surface and microorganisms.”
In Mansoorian’s view, a desirable anode should offer good conductivity to speed up the electron transfer rate; excellent biocompatibility and low bio-toxicity for microbes; higher specific surface area to provide more microbe attachment and catalytic activity sites; chemical stability and anti-corrosion resistance, and flexibility and durability, as well as low cost to commercial application.
“In order to improve bacterial adhesion and efficient electron transfer between bacteria and the electrode surface, the electrode should be modified and its surface area increased to ensure efficient current collection and power yield through the decomposition of organic compounds in the wastewater,” the researcher explained. “Based on the results of this study, the TiO2-HX@MWCNT-COOH-Al2O3 structure of this composite is a suitable candidate for modifying the anode electrode and greatly enhances electroactivity.”
Bamboo instead of platinum
Mansoorian and his group also investigated the modification of the cathode to identify a cost-effective alternative to platinum. Carbon felt modified with powdered activated carbon (PAC) originating from Bambuseae (a family of bamboo plants) was found to be effective.
According to the researcher, the findings from this study are the latest in continuing efforts to improve MFC performance. “A tremendous breakthrough has been made regarding power output in MFCs from a few mW⋅cm-2 or mW⋅cm-3 to several W⋅cm-2 or W⋅cm-3, an improvement of three orders of magnitude, owing to continuous efforts of researchers,” he noted. “The use of fossil fuels, especially oil and gas, in recent years has accelerated and this is triggering a global energy crisis. Renewable bioenergy is viewed as one of the ways to alleviate the current global warming crisis.”
For Mansoorian, the large volumes of wastewater generated by the vegetable oil industry mean that the high energy requirements of conventional wastewater treatment are unsustainable.
“Since traditional wastewater treatment has various limitations, sustainable implementations of MFCs might be a feasible option in wastewater treatment as well as green electricity production, bio-hydrogen synthesis, carbon sequestration, and environmentally sustainable sewage treatment,” the scientist pointed out. “But for MFCs to be a viable option for wastewater treatment, they need to be scaled up to accommodate large volumes of incoming wastewater, which has proven challenging for several reasons, including minimizing the distance between the anode and cathode to reduce electrical losses and being cost-competitive with other treatment technologies.”
In addition, Mansoorian noted that the materials used for MFCs are expensing, as they include membranes to separate the electrodes, which are prone to fouling, and a catalyst to produce enough power.
“At last, after obtaining superior anode electrodes, it is necessary to examine their long-term performance in real wastewater treatment to investigate their stability, durability, mechanical properties and secondary pollution effects,” he said. “Nonetheless, MFCs undoubtedly have potential in terms of energy recovery during wastewater treatment, occupying a market niche in terms of a stand-alone power source and also in the direct treatment of wastewater.”
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La propulsion à l’eau est-elle possible dans l’espace ?
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Le gène qui nous a protégés de la peste agit encore contre la Covid-19
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mardi 14 mars 2023
Les forces spéciales américaines veulent utiliser les deepfakes pour manipuler l'opinion
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Scientists use crab shells to develop battery anodes
Researchers at the Kyushu Institute of Technology and Shandong First Medical University are “upcycling” crab shells to create anode materials for sodium-ion batteries — an up-and-coming competitor to lithium-ion chemistries.
In a paper published in the journal ACS Omega, the scientists explain that although chemically similar to lithium, sodium ions are larger, and thus incompatible with a lithium-ion battery’s anode, which is typically made of graphite. However, when hard carbon is combined with metallic semiconductor materials, such as transition metal dichalcogenides (TMDs), the material can become a feasible battery anode.
Previous research has shown that it is possible to create hard carbon using chitin in crab shells. Thus, authors Yun Chen, Yue Zhao, Hongbin Liu and Tingli Ma decided to explore how two different TMDs — tin sulphide and iron sulphide — could be combined with such hard carbon to make a viable sodium-ion battery anode.
To develop their “crab carbon,” they heated crab shells to temperatures exceeding 1000 F. They then added the carbon to a solution of either tin sulphide (SnS2) or iron sulphide (FeS2), then dried them to form anodes. The porous, fibrous structure of the crab carbon provided a large surface area, which enhanced the material’s conductivity and ability to transport ions efficiently.
When tested in a model battery, the team found that both composites had good capacities and could last for at least 200 cycles.
In the researchers’ view, this work could provide a route to upcycle other wastes and help develop more sustainable battery technologies.
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Ce fossile vieux de 520 millions d'années ne serait pas celui d'un animal
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Ce 14 mars 2023, c'est la fête à Pi : ha-∏ day !
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L'astronaute française Sophie Adenot commencera bientôt sa formation à l'ESA
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La xylazine ou la drogue du zombie fait des ravages aux États-Unis
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lundi 13 mars 2023
L'éruption du volcan Mérapi a provoqué d'impressionnantes nuées ardentes en Indonésie
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EV batteries get some bling
San Francisco-based NDB, Inc. recently announced the launching of its Nano Diamond Battery technology.
The solution, which is an atomic voltaic cell for mid and high-power applications, uses diamonds – the hardest known transducer materials – to harvest energy.
In detail, the device generates electricity similarly to solar cells but, instead, uses radiation from radioactive decay instead of sunlight.
It combines an emitter, the NDB T1 transducer, and a collector that forms an ohmic and Schottky contact.
The energetic radiations released from radioactive decay scatter and deposit energy into the transducing elements. The isotope, together with the host, generates electricity on its own.
Several single units are attached to create a stack arrangement. These make a positive and negative contact surface similar to a standard battery system.
“The key principle of DiD is to create multiple independent and protective layers of defence to compensate for any NDB potential human and mechanical failures,” the company’s website states. “The stacks and the source are coated with a layer of polycrystalline diamond (PCD), which is known for being the most thermally conductive material. It also can contain radiation within the device and is the hardest material, twelve times tougher than stainless steel. This makes our product extremely robust and tamperproof.”
In NDB’s view, the technology has the potential to revolutionize the battery industry with a number of advantages over traditional lithium-ion batteries. Some of the notable features include a longer lifespan, durability and higher energy density.
“We are thrilled to be launching our crowdfunding and bringing NDB to the general public,” said Nima Golsharifi, CEO of NDB. “Our technology, which is protected by three pending patent applications, has the potential to change the sustainability and efficiency of the energy industry. It is an industry game-changer, and we are excited to bring it to market with the support of our investors.”
According to Golsharifi, the solution has already received significant interest from various industries, including electric vehicles, renewable energy systems and defence technology companies.
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L’US Air Force dévoile son futur bombardier nucléaire furtif, le B-21 Raider
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Rio Tinto commences underground production at Oyu Tolgoi
Rio Tinto on Monday said it commenced underground production at its Oyu Tolgoi copper mine in Mongolia.
Since the agreement between the Government of Mongolia and Rio Tinto in January 2022 to reset the relationship and move the Oyu Tolgoi underground project forward, 30 drawbells have been blasted and copper is now being produced from the underground mine.
Oyu Tolgoi is expected to become the fourth-largest copper mine in the world by 2030, operating in the first quartile of the copper equivalent cost curve, according to the company.

The Oyu Tolgoi project is now producing ore from 1.3 kilometers below the surface of the Gobi Desert, Rio’s Chief Executive Officer Jakob Stausholm told reporters gathered at the site. Rio Tinto is spending $7 billion on the underground project.
“It’s not been a smooth ride, let’s be honest about that,” said Stausholm, referring to the mine’s long and troubled journey as lawmakers in Mongolia repeatedly sought better terms.
The mine is expected to produce around 500,000 tonnes of copper per year, on average, from 2028 to 2036.
Open pit mining at Oyu Tolgoi has been operational since 2011.
Last year, Rio Tinto completed its long drawn-out acquisition of the remaining 49% stake in Turquoise Hill Resources, which owned part of the Mongolian mine.
The acquisition gave Rio Tinto a 66% stake in the mine, which has the world’s largest known copper and gold deposit. The Mongolian government holds the remaining 34%.
Shares in Rio Tinto rose 1% Monday morning in New York. The company has a $173.1 billion market cap.
(With files from Reuters and Bloomberg)
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Nokia G22 : le smartphone low-cost qui mise sur la réparabilité
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De nouveaux indices en faveur de la présence de combats de gladiateurs en Angleterre
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dimanche 12 mars 2023
Voici le bilan détaillé des émissions de CO2 pour chaque pays
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Habiter au pied d'un volcan menaçant en Indonésie
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Des data centers sur la Lune, mais pour quoi faire ?
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On connaît l'origine de l'aile des dinosaures !
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Les nuages, c'est de la vapeur d'eau, vrai ou faux ?
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Comment ces fourmis géantes ont-elles colonisé le monde il y a 50 millions d’années ?
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samedi 11 mars 2023
L’explosion du superbolide de Chelyabinsk reconstituée en détail
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Le MIT a réussi à créer un jumeau fonctionnel du cœur d’un patient
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Cet aliment est-il vraiment le plus sain du monde ?
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Comment transformer un astéroïde en station spatiale
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Projet X-ray : les chauves-souris kamikazes du Dr Adams [REDIFF]
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Qui sont les plus anciens cavaliers connus ?
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vendredi 10 mars 2023
La nouvelle version de ChatGPT arrive la semaine prochaine
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TikTok : les créateurs de vidéos vont pouvoir monétiser leurs contenus
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Ancient Romans failed to fully exploit rich silver deposit in Germany
New archaeological research shows that ancient Romans failed to uncover a rich silver deposit in Bad Ems, western Germany.
Work carried out by Goethe University’s Provincial Roman Archaeology department, which uncovered a military camp in the area, matches what historian Tacitus wrote almost 2000 years ago. He described how, under Roman governor Curtius Rufus, soldiers attempted to mine silver ore in the area but failed in 47 AD.
The yield had simply been too low. In fact, the team of Frankfurt archaeologists was able to identify a shaft-tunnel system suggesting Roman origins. The tunnel is located a few meters above the Bad Ems passageway, which would have enabled the Romans to mine silver for up to 200 years – that is, if only they had known about it. In the end, the silver was mined in later centuries only.
The Romans’ hope for a lucrative precious metal mining operation is a good explanation for the presence of the military camp that extends on both sides of the Emsbach valley. They wanted to be able to defend themselves against sudden raids – not an unlikely scenario, given the value of the raw material.
“To verify this assumption, however, further research is necessary,” researcher Markus Scholz said in a media statement. “It would be interesting to know, for example, whether the large camp was also surrounded by obstacles meant to hinder an enemy approach. So far, no wooden spikes have been found there, but traces could perhaps end up being discovered in the much drier soil.”
According to Scholz, the fact that the Romans abruptly abandoned an extensive undertaking is not without precedent. Had they known that centuries later, in modern times, 200 tons of silver would be extracted from the ground near Bad Ems, they might not have given up so quickly.
The soldiers who were ordered to dig the tunnels obviously had not been too enthusiastic about the hard work: Tacitus reports that they wrote to Emperor Claudius in Rome, asking him to award the triumphal insignia to the commanders in advance so they would not have to make their soldiers slave away unnecessarily.
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Une spectaculaire tornade filmée dans la Creuse : les habitants décrivent une scène apocalyptique !
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Voici Figure 01, le robot humanoïde le plus ressemblant à l’humain jamais construit
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Qui est responsable de la disparition des lynx en France ?
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jeudi 9 mars 2023
Découverte d’une statue Moaï inédite sur l’Île Pâques
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Phosphorus can be produced in an environmentally friendly way – study
MIT chemists have devised an environmentally friendly way to generate white phosphorus, a critical intermediate in the manufacture of products such as herbicides, lithium-ion batteries, and even soft drinks.
In a paper published in the journal ACS Central Science, the researchers note that their approach, which uses electricity to speed up a key chemical reaction, could reduce the carbon emissions of the process to convert phosphate to white phosphorus by half or even more.
The new process reduces the environmental footprint of white phosphorus production in two ways: It lowers the temperatures required for the reaction, and it generates significantly less carbon dioxide as a waste product.
Lead authors Jonathan “Jo” Melville and Andrew Licini explained in a media statement that when phosphorus is mined out of the ground, it is in the form of phosphate, a mineral whose basic unit comprises one atom of phosphorus bound to four oxygen atoms. About 95% of this phosphate ore is used to make fertilizer. The remaining phosphate ore is processed separately into white phosphorus, a molecule composed of four phosphorus atoms bound to each other.
Converting those mined phosphates into white phosphorus accounts for a substantial fraction of the carbon footprint of the entire phosphorus industry. The most energy-intensive part of the process is breaking the bonds between phosphorus and oxygen, which are very stable.
Using the traditional “thermal process,” those bonds are broken by heating carbon coke and phosphate rock to a temperature of 1,500 degrees Celsius. In this process, the carbon serves to strip away the oxygen atoms from phosphorus, leading to the eventual generation of CO2 as a byproduct. In addition, sustaining those temperatures requires a great deal of energy, adding to the carbon footprint of the method.
“That process hasn’t changed substantially since its inception over a century ago. Our goal was to figure out how we could develop a process that would substantially lower the carbon footprint of this process,” Yogesh Surendranath, senior author of the study, said. “The idea was to combine it with renewable electricity and drive that conversion of phosphate to white phosphorus with electrons rather than using carbon.”
To do that, the researchers had to come up with an alternative way to weaken the strong phosphorus-oxygen bonds found in phosphates. They achieved this by controlling the environment in which the reaction occurs. The researchers found that the reaction could be promoted using a dehydrated form of phosphoric acid, which contains long chains of phosphate salts held together by bonds called phosphoryl anhydrides. These bonds help to weaken the phosphorus-oxygen bonds.
Normally, when they run an electric current through these salts, electrons break the weakened bonds, allowing the phosphorus atoms to break free and bind to each other to form white phosphorus. At the temperatures needed for this system (about 800 C), phosphorus exists as a gas, so it can bubble out of the solution and be collected in an external chamber.
The electrode that the researchers used for this demonstration relies on carbon as a source of electrons, so the process generates some carbon dioxide as a byproduct. However, they are now working on swapping that electrode out for one that would use phosphate itself as the electron source, which would further reduce the carbon footprint by cleanly separating phosphate into phosphorus and oxygen.
With the process reported in this paper, the researchers have reduced the overall carbon footprint for generating white phosphorus by about 50%. With future modifications, they hope to bring the carbon emissions down to nearly zero, in part by using renewable energy such as solar or wind power to drive the electric current required.
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Les constructeurs automobiles se lancent dans le vélo électrique
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Et si nous allions vers un nouveau Big Bang ?
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L’Australienne Katherine Bennell-Pegg va s’entraîner avec les astronautes européens
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Un vaccin contre l'asthme pourrait bientôt soulager les cas sévères
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mercredi 8 mars 2023
ChatGPT a maintenant un visage et une voix !
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Bold Glamour : le filtre TikTok hallucinant qui va vous faire adorer (ou détester) votre tête
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Scientists synthesize rare earth element key for biomedical research
Geoscientists at Trinity College Dublin have developed a cheap and environmentally friendly method for the synthesis of cerium, a rare earth mineral that holds promise for the treatment of diseases associated with inflammation, including cancer.
In a paper published in the journal RSC Advances, the researchers explain that they found out why cerianite is associated with REE-carbonates and how exactly it forms in nature. At the same time, they produced a sort of cookbook for material engineers with easy recipes for the synthesis of Ce-carbonates and cerianite with different sizes and shapes.
Cerianite or cerium-oxide (CeO2) is a compound widely used by the energy, transportation, electronics and healthcare sectors. It is also considered a promising material for biomedical research due to its antioxidant properties. For example, cerianite nanoparticles are being investigated as therapeutic agents for the treatment of diseases associated with oxidative stress and inflammation, including cancer.
“Our simple method allows for the production of cerianite with different sizes and shapes. The smallest particles are just a few nanometers and the largest are 50 micrometres. This will be useful in biomedical sciences, production of carbon-neutral technologies and material sciences,” Juan Diego Rodriguez-Blanco, lead author of the paper, said in a media statement.
Rodriguez-Blanco explained that the study shows how he and his colleagues synthesized cerianite using various methods with various shapes and sizes by using different crystallization routes, some of them mimicking natural processes.
In detail, the scientists combined two simple fabrication processes at low temperatures. By adjusting parameters such as temperature, duration of the experiment and concentration, they found that cerianite can form via cerium carbonates, acting similarly to other rare earths such as lanthanum, praseodymium, neodymium and dysprosium. They also found that cerium carbonates eventually decarbonize and form cerianite.
In Rodriguez-Blanco’s view, their methods provide primary information on the synthesis of nanometric and micrometric cerium carbonate and cerianite.
The researcher also pointed out that the processes he and his co-authors described are non-toxic and use common chemicals; thus, they are energy- and material-efficient and can be easily replicated.
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De magnifiques nuages colorés et iridescents photographiés dans le ciel de Mars pour la première fois
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La France et la Chine partent à la chasse aux rayons gamma avec un télescope spatial
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Snapchat ajoute dans l’espace public des statues de femmes emblématiques et inspirantes
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Sûr et immunogène, ce vaccin français contre le VIH réussit la première phase des essais cliniques
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mardi 7 mars 2023
Sibanye-Stillwater secures controlling stake in New Century Resources
Precious metals miner Sibanye-Stillwater (JSE: SSW)(NYSE: SBSW) said on Tuesday it had increased to nearly 71% its stake in Australia’s New Century Resources (ASX: NCZ), which it’s attempting to acquire.
The move comes only two weeks after the South African company launched its unsolicited takeover bid for the zinc miner, valuing it at A$144.1 million ($97.2m).
Sibanye-Stillwater wants to delist New Century from the Australian Stock Exchange once it gets more than 75% of the stock.
“Given that Sibanye Australia currently has voting power in 70.55% of the shares, Sibanye Australia believes the likelihood of a competing proposal emerging for New Century is low,” the company said.
It has also further placed a buy order on the local stock exchange and the Chicago Board Options Exchange to purchase shares on market on or below the A$1.10 offer price.
“This will further enable remaining New Century shareholders who are looking to sell their shares on market to dispose of their holdings in an orderly manner and receive payment,” Sibanye said.
New Century, which had until now advised its shareholders to not take action, said on Tuesday the bid is now open for acceptance.

The company’s Century zinc mine began open-pit production in 1999. Operations were placed on care and maintenance in 2016, following depletion of the original open pit reserves after producing and processing on average 475ktpa zinc and 50ktpa lead concentrate for 16 years.
New Century converted existing processing infrastructure to enable re-processing of legacy tailings waste dumps. The update was completed in August 2018 and the company has been re-processing tailings since.
The zinc mine is expected to run out of ore in 2027, with indicated and inferred resources holding an opportunity to extend operations beyond 2030.
New Century also has the Silver King lead-zinc-silver deposit in Queensland and the Mt Lyell copper mine in Tasmania.
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Tout ce qu’il faut savoir sur la vaccination contre le papillomavirus
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Ils inventent le Shazam qui identifie les bruits suspects de votre voiture
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De nouveaux progestatifs associés à des tumeurs au cerveau chez les femmes
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La monte à cheval daterait de plus de 4 500 ans
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lundi 6 mars 2023
Iamgold picks former New Gold boss Adams as new CEO
Canada’s Iamgold (TSX: IMG) (NYSE: IAG) has appointed Renaud Adams as its new President and chief executive officer, effective April 3.
Adams replaces board chair Maryse Belanger, who was acting as interim President and CEO during the executive search process.
The Toronto-based gold miner has also named Maarten Theunissen as permanent chief financial officer, having served as interim CFO since September.
Adams has more than 30 years of global mining experience in senior executive positions and operations, most recently as President and CEO of New Gold during from 2018 to 2022. He was also the President and CEO of Richmont Mines from 2014 until the company was sold to Alamos Gold in 2017.
Iamgold’s management and board were shaken up in January 2022, with the sudden departure of top boss Gordon Stothart, followed a month later by board chair Don Charter.
The company also kicked off conducting a portfolio of assets review, as part of a strategy that prioritises return on investment and cash flow generation.
The goal, Iamgold said at the time, was to ensure the delivery of Côté – a tier-one, generational asset in Ontario, Canada, which is expected to come online in early 2024.
The company in December secured funding to finish the project, by amending its existing joint venture agreement with Japan’s Sumitomo Metal Mining.
As part of the deal, Sumitomo committed to contribute with about $340 million over the course of 2023. In exchange, Iamgold will transfer an approximate 10% interest in the project to Sumitomo.
Iamgold will retain a repurchase option that can be exercised until December 2026 to return to its full 70% interest in the gold project. The company has remained as the mine operator.
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Des images incroyables de la Californie ensevelie sous la neige
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Moins d'arbres dans les tropiques, cela signifie moins de pluie
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