DNA Structure - Contents page (Fabien) An Interactive Animated Nonlinear Tutorial by Eric MartzAdapted for using Jmol instead of Chime, by Angel Herráez Part of Biomodel website by Angel Herráez, Univ. de Alcalá (Spain) Disponible también en español. Também disponível em português. Auch verfügbar auf Deutsch. Disponible aussi en français. This version 4.3 works in any Java-compatible browser. If you prefer using Chime for molecular models, the page using it is still available, with equivalent content and functionality. This tutorial is designed to complement Biology or Biochemistry and Molecular Biology books, so it is not by itself a complete introduction to DNA structure. Before proceeding, check that your browser has Java installed and can use the Jmol software: This tutorial is designed to complement an introduction to DNA, by providing tools for a self-directed exploration. Methods, Acknowledgements, and References. Do you know there are more tutorials at MolviZ.Org? More about Jmol: Jmol home page. Version history
New species discovered in Asia include a singing frog and a walking fish The World Wildlife Fund has a new report about recent new species discoveries in the Mekong Delta region, which encompasses Cambodia, Laos, Myanmar, Thailand, Vietnam, and a part of southern China. Here’s the thing — they’re, uh, they’re kind of advanced. Like, there’s a fish that walks on land, and a frog that composes music, and a lizard that walks on two legs, and a bat that suggests this is all because of some kind of demonic intervention. You can read the full report here [PDF], but meanwhile, here are our favorite demonstrations that the new animals of the Mekong Delta are a force to be reckoned with and possibly a harbinger of the End Times. Singing frog Anyone can croak, but male frogs of the species Graxicalus quangi sing songs to their beloveds instead. Walking catfish Clarias gracilentus looks kinda more like a slug than a fish in this photo, which is appropriate since it can walk on dry land. Two-legged lizard Devil bat
First-Ever Patient Treated In Stem Cell Study Groundbreaking news! For the first time ever in the United States, a patient has been treated with embryonic stem cells. It’s part of the first study authorized by the Food and Drug Administration to test this controversial therapy. Millions of embryonic stem cells were injected into a patient who was partially paralyzed by a spinal cord injury, according to an announcement this morning by the Geron Corporation of Menlo Park, California, which is sponsoring this study. Two Million Stem Cells Injected In the treatment, scientists injected about 2 million “oligodendrocyte progenitor cells,” created from embryonic stem cells, in the hopes that the cells will form a restorative coating around the damaged spinal cord. Room For Hope Supporters of these privately funded, government-approved tests are confident that research has been thorough. But Some Are Concerned But many scientists are worried. Medical Milestone This study is controversial, but it is also bringing hope to many.
Virtual Fetal Pig Dissection | Whitman College (philippe) Welcome to the Whitman College Biology Department's Virtual Pig Dissection (VPD)! This site is designed as a supplement to laboratory dissections exploring introductory mammalian anatomy and physiology — it is basic and many details have been omitted for clarity. We hope that it is suitable for AP Biology students or for students of introductory anatomy and physiology at the college level. We have revised this site to improve the learning experience and accessibility. Within this site, you can navigate to any chapter from the links at the left. Kadolis- Tout pour le bébé - kadolis Rinderpest virus has been wiped out, scientists say 14 October 2010Last updated at 17:32 By Pallab Ghosh Science correspondent, BBC News The disease arrived in Africa at the end of the nineteenth century Scientists working for the UN say that they have eradicated a virus which can be deadly to cattle. If confirmed, rinderpest would become only the second viral disease - after smallpox - to have been eliminated by humans. Rinderpest was once prevalent in the Middle East, Africa and Asia. The UN's Food and Agriculture Organization (FAO) has said that it will now suspend its efforts to track and eliminate the virus. The FAO said it was "confident" the virus has been eradicated from those parts of the world where it is prevalent. When the disease arrived in Africa at the end of the nineteenth century between 80% and 90% of cattle and buffalo on the continent were killed. These are the regions afflicted by the viral disease in the recent past. Dr Mike Baron of the IAH told BBC News that it had been too dangerous for outsiders to enter those areas.
Pascaline On your bike: how muscles respond to exercise We all know that exercise makes us fitter and healthier – but what changes take place in our cells to make this happen? Next time you are working out in the gym, or pounding the streets running or jogging, ponder this: the idea of ‘muscle memory’ – that today’s exercise has effects on our muscles years from now – has never been demonstrated scientifically. Does it really exist, and if so, how does it work? These are some of the questions we hope to answer in our on-going research, which aims to pin down the changes that occur in muscles when we exercise, and how our muscles ‘know’ to respond differently to, say, endurance training as opposed to strength training. Helping us to investigate these questions is a large team of volunteers. We assess the fitness of our volunteers before and after participation in the studies by measuring their maximal oxygen uptake. Of course, we already know that regular exercise produces health benefits. Building mitochondria Epigenetic factors Acknowledgement
272/ Lâcher prise : Grenouille rieuse (Rana ridibunda Pallas), Château de Saint-Victor des Oules, Gard, France, 21 juin 2012 "S'accrocher au connu, c'est rester prisonnier de l'ignorance."Yvon Rivard, écrivain canadien (1945- ) Lâcher prise Attiré par le croassement sonore des grenouilles de l'étang, je m'approche de l'eau calme en essayant de ne pas attirer l'attention de ses habitants bruyants. Mais quelques brindilles d'herbe froissée suffisent à les dissuader de continuer leur conversation animée. Sur une nappe de nénuphars, plusieurs grenouilles se hissent avec bien peu de grâce. Est-ce un roi transformé en grenouille ? Grenouille rieuse, si tu restes accroché ainsi tu risques de ne pas connaître l'étendue de la marre. Entre le risque de lâcher la proie pour l'ombre et l'enfoncement progressif dans le confort d'un microcosme connu, quel est le bon choix ? S'exposer à l'inconnu peut nous permettre de découvrir d'autres chemins - des impasses ? Le mouvement est nécessaire. La clé serait-elle donc dans une forme de certitude de l'incertain ? Pour ma part, je fuis les vérités absolues.
Canadian scientists transform human skin into blood Dr. Mickie Bhatia (photographed in his McMaster University lab in Hamilton on November 5, 2010) director the of stem cell and cancer research institute at McMaster University in Hamilton and his team of researchers have been able to create blood directly from adult skin cells. Photograph by: Glenn Lowson , National Post Canadian scientists have transformed pinches of human skin into petri dishes of human blood — a major medical breakthrough that could yield new sources of blood for transfusions after cancer treatments or surgery. The discovery, by researchers at McMaster University in Hamilton, Ont., could one day potentially allow anyone needing blood after multiple rounds of surgery or chemotherapy, or for blood disorders such as anemia, to have a backup supply of blood created from a tiny patch of their own skin — eliminating the risk of their body’s immune system rejecting blood from a donor. Researchers predict the lab-grown blood could be ready for testing in humans within two years.
problème obésité : Persuasive Games -Fatworld (laura philippe) Fatworld is a game about the politics of nutrition. It explores the relationships between obesity, nutrition, and socioeconomics in the contemporary U.S. Fit or Fat? In the last two decades, obesity has soared in the United States. Public and private organizations have mounted ongoing efforts to change Americans’ behavior toward nutrition and exercise. More importantly, these efforts assume that our obesity crisis is caused solely by lack of self-control: if only everyone would choose to eat right and exercise, the problem would go away. Fatworld is a videogame about the politics of nutrition. Existing approaches to nutrition advocacy fail to communicate the aggregate effect of everyday health practices. You can choose starting weights and health conditions, including predispositions towards ailments like diabetes, heart disease, or food allergies. Interested in politics?
Falafels crus - GRENOUILLE CITADINE En ce moment, il faut bien avouer, le régime sans gluten ni produits laitiers me pèse un peu. Je rêverais de ne pas me prendre la tête en cuisine, de fonctionner sur mes vieux automatismes, de pouvoir dans la panique acheter des raviolis frais et les cuisiner en 2 minutes montre en main. Hélas je bataille toujours avec les compositions, jusqu'à découvrir que les falafels du rayon frais que je préférais entre tous contiennent du gluten ! Grmpf ! Donc du coup je suis à la recherche de LA bonne méthode pour les falafels maison, mais comme je ne suis pas du tout d'humeur culinaire, j'ai déjà raté mes deux premières séries - pour un résultat mangeable et congelable, mais trop sec. Pour la présentation, j'ai choisi de les rouler dans un mélange de poudre d'amande-gomasio-levure maltée (moui je sais y'a un poil de gluten, pas bien, mais la levure je suis trop accro), le résultat poudreux m'a paru très joli... et bon.
NASA finds extra-terrestrial amino-acids in Sudan meteorites Earlier this month, NASA announced the discovery of bacteria living in arsenic in a California lake. Now they have uncovered ET amino-acids in meteorite fragments that landed in northern Sudan. The meteorite was a fragment of a parent asteroid measuring 13-feet-wide (4m), and weighing 59-tons. Scientists were given the first opportunity to observe a celestial object before it entered our atmosphere in October 2008 after a collision about 15 million years ago sent the asteroid closer to Earth. During expeditions in the Sudanese desert, scientists later recovered nearly 600 meteorite fragments from the meteor shower. Read more... Amino-acids have been found in carbon-rich meteorites before but this is the first time the acid substances have been found in a meteorite as hot as 2,000 Fahrenheit (1,100c).
A Serious Game on Biodiversity in Wheat Farming | KTM Advance April 28, 2014 A Serious Game on Biodiversity in Wheat Farming Lu, the leading French cookie manufacturer, further confirmed its desire to minimize the company’s impact on the environment by creating LU Harmony. This new wheat network, created in partnership with French farmers, favors biodiversity and guarantees quality wheat farming. In 2010, KTM Advance created a serious game to allow young players to learn about the sustainable development LU defends and dive into the wheat field ecosystem. They also learn how to grow quality wheat and maintain local biodiversity. The “Harmonyculteurs,” or “Harmony Farmers,” deals with complex information in a fun and accessible way.