Nouvelles et événements

Footprints found on Canadian West Coast could be oldest in North America Affiché: 25 juin 2015

Footprints found in clay on the shore of Calvert Island on British Columbia's central coast appear to be 13,200 years old, which would make them older than any others ever found in North America. University of Victoria archeologists Duncan McLaren and Daryl Fedje led the team that made the discovery. More at Hakai Magazine.

Blood turned into nerve cells by Canadian researchers Affiché: 24 mai 2015

Mick Bhatia, director of McMaster University's Stem Cell and Cancer Research Institute, says his lab hopes to eventually develop neurons that could one day be transplanted into patients to restore healthy brain cells as a treatment for various diseases, like Alzheimer's. More at the CBC

Canadian scientists solve knuckle-cracking riddle Affiché: 15 avril 2015

Scientists at the University of Alberta used MRI video to determine what happens inside finger joints to cause the distinctive popping sounds heard when cracking knuckles. For the first time, they observed that the cause is a cavity forming rapidly inside the joint. Watch the video available at the UofA Faculty of Rehabilitation Medicine.

Canadians love birds Affiché: 10 mars 2015

Statistics Canada reported today that, based on the 2013 census, one in four Canadian households maintain bird feeders in their gardens. Homes in non-urban settings had the most bird feeders at 36%, while city dwellers provide bird feeders at the rate of 20%. Also, 9% of Canadian families own bird identification books or binoculars for bird watching. 

Canadian researchers spin spider silk proteins into artificial silk Affiché: 12 février 2015

Spiders make seven different kinds of silk they use for different purposes. But although humans have farmed silkworms for thousands of years, spider silk has proven impractical. Instead, scientists in Jan Rainey's biochemistry lab at Dalhousie University are working out the molecular nature of the strongest kind of spider silk, which is used for wrapping prey, and using the knowledge to create new ultra-strong biomimetic fibers. Read more...

New Canadian guidelines for losing weight Affiché: 26 janvier 2015

The Canadian Task Force on Preventive Health Care has issued its latest guidelines on adult obesity prevention and management. Adult obesity in Canada has nearly tripled in the past 40 years. Today 67% of men and 54% of women are considered overweight or obese making adult obesity one of Canada’s most pressing public health challenges. Among other things the new guidelines recommend life-style changes over diet drugs such as orlistat or metformin. Experts note that a weight reduction of even 5% is beneficial and can extend life expectancy.

 

 

How much fossil fuel can we exploit? Affiché: 7 janvier 2015

Canada would need to leave 75 per cent of its oil in the ground as part of a global effort to cap global warming at two degrees Celsius above pre-industrial levels, a new study shows. The authors also conclude that the exploitation of resources in the Arctic should be ruled out. Using computer models, the authors found that if current global fossil fuel reserves are burned as planned, that will result in CO2 levels on Earth about three times higher than the +2 degree C level predicted by IPCC models. See our Stop The Burning page, Source: Science Media Centre.

Water water everywhere contains life Affiché: 17 décembre 2014

A team of scientists, led by the University of Toronto's Barbara Sherwood Lollar, has mapped the location of hydrogen-rich waters found trapped kilometres beneath Earth's surface in rock fractures in Canada, South Africa and Scandinavia. Hydrogen sulfide and other salts in these waters support bacterial life, possibly for billions of years, which means there could be similar life deep beneath the surface of Mars and other planets. More at eScience news.

Stem cell breakthrough led by Canadian researchers Affiché: 11 décembre 2014

A team of over 50 scientists led by Andras Nagy of Toronto’s Mount Sinai Hospital have discovered a new class of stem cells, which could eventually lead to new treatments for all sorts of diseases. In particular they have characterized all the proteins involved in the three week process that changes an ordinary skin cell into a stem cell, which can then become any kind of cell in the human body. The results are published today in the journal Nature.

Researchers develop clothes that can monitor and transmit biomedical info on wearers Affiché: 3 décembre 2014

Researchers at Université Laval's Faculty of Science and Engineering and Centre for Optics, Photonics and Lasers have developed smart textiles able to monitor and transmit wearers' biomedical information via wireless or cellular networks. This technological breakthrough, described in a recent article in the scientific journal Sensors, clears a path for a host of new developments for people suffering from chronic diseases, elderly people living alone, and even firemen and police officers. read more

Pushing the limits of chemistry with iridium Affiché: 22 octobre 2014

Canadian scientists working with the element iridium in Gary Schrobilgen's lab at McMaster university set a new record for the highest formal oxidation state in the periodic table of the elements. Oxidation state describes the number of electrons an atom loses or gains when it joins with other atoms in chemical compounds; the higher the oxidation state, the more electrons, critical in many applications, especially batteries. Previously the highest number was 8. Working with Chinese and German colleagues, the scientists created a gaseous form of iridium tetroxide reaching an oxidation state of 9. More at the Science Media Centre...

Take two parasites and call me in the morning Affiché: 26 juillet 2014

Two recent papers suggest that some parasites may be good for us. UBC botanist Laura Wegener-Parfrey and Julius Lukeš of the Canadian Centre for Advanced Research question our traditional perception of intestinal parasites. The papers offer a systematic review of cases where humans have deliberately ingested parasites for research and suggest that certain parasites could have beneficial effects on conditions such as Crohn's disease and Irritable Bowel Syndrome. More at Science Media Centre of Canada.

Unlocking the secrets of amber’s toughness Affiché: 12 juillet 2014

Amber is fossilized tree sap, an organic polymer that lasts millions of years, far longer than any plastic. A new analysis technique delveloped by scientists at the Canadian Conservation Institute in Ottawa explains how amber achieves its strength and durability, and could help humans mimic it in their own materials.  Scientists have been able to isolate the building blocks – including communol, ozol and succinic acid. Now we are beginning to understand how exactly how they fit together. More at the Science Media Centre of Canada.

How salmon evolve to beat the heat Affiché: 8 juillet 2014

Researchers have discovered a link between egg size of chinook salmon and their ability to deal with warmer temperatures. The team captured spawning salmon and measured examined the genetic and maternal effects acting on the ability of offspring to tolerate heat; they found that mothers with larger eggs have more thermally tolerant offspring. As egg […]

A breakthrough for organic reactions in water Affiché: 26 juin 2014

Green-chemistry researchers at McGill University have discovered a way to use water as a solvent in one of the reactions most widely used to synthesize chemical products and pharmaceuticals.

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New horned dinosaur reveals unique wing-shaped headgear Affiché: 18 juin 2014

Scientists have named a new species of horned dinosaur (ceratopsian) based on fossils collected from Montana in the United States and Alberta, Canada. Mercuriceratops (mer-cure-E-sare-ah-tops) gemini was approximately 6 meters (20 feet) long and weighed more than 2 tons. It lived about 77 million years ago during the Late Cretaceous Period. Research describing the new species is published online in the journal Naturwissenschaften.

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International team maps nearly 200,000 global glaciers in quest for sea rise answers Affiché: 11 mai 2014

An international team led by glaciologists from the University of Colorado Boulder and Trent University in Ontario, Canada has completed the first mapping of virtually all of the world's glaciers -- including their locations and sizes -- allowing for calculations of their volumes and ongoing contributions to global sea rise as the world warms.

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Ancient Virus DNA behind Stem Cell Power Affiché: 31 mars 2014

A virus that invaded the genomes of humanity's ancestors millions of years ago now plays a critical role in the embryonic stem cells from which all cells in the human body derive, Canadian research shows. Computational biologist Guillaume Bourque at McGill University in Montreal, co-authored the study published online March 30 in Nature Structural & Molecular Biology. Read more about this at National Geographic.

New fossil field discovered in British Columbia Rocky Mountains Affiché: 11 février 2014

Expected to rival the Burgess Shale, a new fossil bed in the Kootenays should shed more light on the great Cambian explosion of diversity of living creatures that happened about 550 million years ago. Many fosilized creatures found at the new site have never been seen before. The team leader Jean-Bernard Caron is a paleontologist with the Royal Ontario Museum. Read more...

Quality control of mitochondria as a defense against disease Affiché: 21 janvier 2014

Scientists from the Montreal Neurological Institute and Hospital in Canada have discovered that two genes linked to hereditary Parkinson's disease are involved in the early-stage quality control of mitochondria. The protective mechanism, which is reported in The EMBO Journal, removes damaged proteins that arise from oxidative stress from mitochondria.

Stats Canada study verifies difference in male/female interest in science Affiché: 18 décembre 2013

A study released today demonstrates how Canadian women prefer to choose non-science and non-mathematics related university courses even if they have a propensity for math in high-school. The study was based on the 2011 National Household Survey as well as a long-term Youth in Transition study that followed students from 2000 - 2010. Even if women have high mathematics aptitute they are twice as likely to choose to study the social sciences rather than engineering and computer science. Read the full study at the Statistics Canada Website. The data supports the findings of Canadian neuroscientist Doreen Kimura who has studied sex differences in human brains all her life.

Twitter not a good indicator of scientific impact Affiché: 9 décembre 2013

Trends related to the most-tweeted peer-reviewed scientific papers published between 2010 and 2012, and their social media success, have been identified by Stefanie Haustein at the University of Montreal's School of Library and Information Science. Based on 1.4 million documents from PubMed and Web of Science, it is the largest Twitter study of scholarly articles so far. Consider that a paper about an altered gene during radiation exposure was tweeted 963 times but only received 9 academic citations. "When we look at the most tweeted articles, many have a surprising or humourous character. Articles are often tweeted anecdotally," says her supervisor Vincent Larivière.

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Improved colon cancer treatment by targeting cancer stem cells Affiché: 4 décembre 2013

Scientists and surgeons at Princess Margaret Cancer Centre in Toronto have discovered a promising new approach to treating colorectal cancer by disarming the gene that drives self-renewal in stem cells that are the root cause of disease, resistance to treatment and relapse. Colorectal cancer is the third leading cause of cancer-related death in the Western world.

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Quantum memory advance Affiché: 15 novembre 2013

An international team of scientists led by physicist Mike Thewalt of Simon Fraser University in Vancouver, Canada have created stable "Qubits" of information encoded in a room temperature silicon system lasting 100 times longer than ever before. Such memory systems are essential for future quantum computers. More from the BBC.

Fecal transplant pill knocks out recurrent C. diff infection, study shows Affiché: 4 octobre 2013

Swallowing pills containing a concentrate of fecal bacteria successfully stops recurrent bouts of debilitating Clostridium difficile (C. diff) infection by rebalancing the bacteria in the gut, according to Dr. Tom Louie at the University of Calgary.

University of Calgary researchers enhance quantum-based secure communication Affiché: 21 septembre 2013

University of Calgary scientists have overcome an "Achilles' heel" of quantum-based secure communication systems by using a new approach that works in the real world to safeguard secrets.

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What scientists can see in your pee Affiché: 6 septembre 2013

Researchers at the University of Alberta announced today that they have determined the chemical composition of human urine. The study, headed by David Wishart took more than seven years and involved a team of nearly 20 researchers. It found that more than 3,000 chemicals or "metabolites" can be detected in urine. The results are expected to have significant implications for medical, nutritional, drug and environmental testing. read more

People recycle more when stuff looks good Affiché: 27 août 2013

University of Alberta marketing researcher Jennifer Argo found that people don't recycle products that look like garbage. If a can is dented or a paper package is torn people are more likely to throw it out. The research has implications for policy makers as well as manufacturers of products.

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Boning up: McMaster researchers find home of best stem cells for bone marrow transplants Affiché: 1 août 2013

McMaster University researchers have revealed the location of human blood stem cells that may improve bone marrow transplants. The best stem cells are at the ends of the bone.

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BigBrain: An ultra-high resolution 3-D roadmap of the human brain Affiché: 20 juin 2013

Canadian neuroscientists in Montreal contributed to a landmark three-dimensional (3D) digital reconstruction of a complete human brain, called the BigBrain. You can fly through brain anatomy at a spatial resolution of 20 microns, smaller than a human hair --and it's in the public domain. Lead author is Alan Evans at the Montreal Neurological Institute.

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Potentially 'catastrophic' changes underway in Canada's northern Mackenzie River Basin: report Affiché: 10 juin 2013

Canada's Mackenzie River basin -- among the world's most important major ecosystems -- is poorly studied, inadequately monitored, and at serious risk due to climate change and resource exploitation, a panel of international scientists warn today.

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Billion-year-old water could hold clues to life on Earth and Mars Affiché: 15 mai 2013

 

A team of researchers including McMaster’s Greg Slater discovered what may be some of the oldest pockets of water on the planet pouring out of boreholes in a mine nearly 2.5 km below the ground in Timmins, located in northern Ontario, Canada – and they may contain life. read more

 

Les scientifiques canadiens découvrent ce qui nous amène à acheter de la musique Affiché: 16 avril 2013

Des chercheurs de l'Institut neurologique de Montréal, de l'Université McGill ont  analysés les cerveaux des participants lorsqu'ils entendaient des schémas particuliers de sons pour la première fois. Ils ont constaté que l'activité neuronale dans le cadre du "centre de plaisir" du cerveau réagit différemment pour les individus différentes selon le genre de musique qu'ils ont écouté tout au long de leur vie. L'activité dans cette région a également prédit combien d'argent les gens étaient prêts à payer pour la musique.

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Une découverte ouvre la porte au stockage et la réutilisation d'énergie renouvelable Affiché: 31 mars 2013

Deux chercheurs de l' University de Calgary ont développé une façon novatrice de faire de nouveaux catalyseurs abordables et efficaces pour la conversion d'électricité en énergie chimique.

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Les scientifiques allemands avortent la recherche sur les sables bitumineux Affiché: 19 mars 2013

Le plus grand et prestigieux institut de recherche de l'Allemagne s'est retiré d'un projet de recherche de 25 millions de dollars financé par le gouvernement du Canada, cherchant des solutions durables aux pollution créé par les sables bitumineux , citant des craintes pour sa réputation environnementale. Autant que 20 scientifiques du célèbre Association Helmholtz des centres de Recherche Allemands ont cessé leur participation avec l'Initiative Alberta Helmholtz (HAI), après un moratoire sur les contacts a été déclaré le mois dernier.

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Vestiges d'un chameau géant disparu a été découvert dans l'Extrême-Arctique par le Musée canadien de la nature Affiché: 5 mars 2013

Une équipe de recherche dirigée par le Musée canadien de la nature a identifié la première preuve d'un chameau géant disparu dans l'Arctique canadien. La découverte est basée sur les 30 fragments de fossiles d'un os de jambe trouvé sur l'île d'Ellesmere, au Nunavut, et représente l'enregistrement le plus nord pour les premiers chameaux, dont les ancêtres sont connus pour avoir provenu en Amérique du Nord il ya environ 45 millions d'années.

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L'obésité chez les adultes canadiens au plus haut niveau historique Affiché: 27 février 2013

Les taux d'obésité au Canada atteignent des niveaux alarmants, et selon une nouvelle étude de l'Université de la Colombie-Britannique ils continuent à grimper.

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Nouveau radiotélescope près de Penticton, C.-B., construit pour explorer le secret de l'énergie noire Affiché: 28 janvier 2013

La construction a commencé sur un nouveau radiotélescope en Colombie-Britannique au sud de l'Okanagan qui agira comme un type de machine du temps pour aider les astrophysiciens à voyager dans le temps afin de mieux comprendre la composition de notre univers en expansion.

Le projet de $11 M est en cours de construction au fédéral de radioastrophysique Observatoire au sud-ouest de Penticton, en Colombie-Britannique, et utilisera des composants de l'industrie du téléphone cellulaire pour capturer et transformer les ondes radio émises de six à 11 milliards d'années dans une carte en trois dimensions.

C'est le premier télescope de recherche construit au Canada depuis plus de trois décennies et y comprend des scientifiques de l'observatoire, de l'Université de la Colombie-Britannique, l'Université McGill et l'Université de Toronto. En savoir plus sur le site web Macleans.

Les scientifiques à Waterloo gagne la course pour créer le premier modèle d'un cerveau humain qui peut vraiment penser Affiché: 30 novembre 2012

Un groupe de scientifiques canadiens à l'Université de Waterloo conduit par l'ingénieur philosophe Chris Eliasmith ont développé Spaun - en anglais :  Semantic Pointer Architecture Unified Network, un réseau qui est capable des comportements complexes tels que voir et reconnaître, se souvenir, réfléchir et écrire les nombres. Il ecrit les numéros «à la main» sur la base de ce qu'il a appris. Le groupe a publié un article récemment dans Science intitulé "Un modèle à grande échelle du cerveau fonctionnant" avec des détails sur ce modèle de cerveau état de l'art qui a redéfini la course pour une cerveau animaux synthétique. Une autre histoire apparaît dans le journal Nature.

Scientifique canadien éminent critique du développement des sables bitumineux Affiché: 23 novembre 2012

L'un des plus grands scientifiques du Canada, David Schindler, déclare que la rapide expansion des sables bitumineux n'est pas fondée sur la science valide: "Les deux études de base et les évaluations d'impact environnemental ont été de mauvaise qualité, et pourrait même pas vraiment être appelée la science. Cela doit changer». Tel que rapporté par Desmogblog.