PLoS Biology : Publishing science, accelerating research A Peer-Reviewed, Open Access Journal Current Issue PLOS Biology is a peer-reviewed, open-access journal featuring research articles of exceptional significance in all areas of biological science, from molecules to ecosystems. Les enfants de don quichotte FLI - Future of Life Institute Brain Stories | Evidence-based neurological facts Scientists observe single gene activity in living cells in detail for first time Researchers at Albert Einstein College of Medicine of Yeshiva University have for the first time observed the activity of a single gene in living cells. In an unprecedented study, published in the April 22 online edition of Science, Einstein scientists were able to follow, in real time, the process of gene transcription, which occurs when a gene converts its DNA information into molecules of messenger RNA (mRNA) that go on to make the protein coded by the gene. Robert Singer, Ph.D., co-director of the Gruss Lipper Biophotonics Center at Einstein and professor and co-chair of anatomy and structural biology, is senior author of the paper. The study's lead author is Daniel Larson, Ph.D., previously a member of Dr. Singer's lab and now an investigator at the National Cancer Institute and head of the institute's Systems Biology of Gene Expression Section. Using florescent proteins, the researchers were able to follow mRNA activity by inserting DNA sequences into a gene in live yeast cells.
Brésil – Russie – Inde – Chine – Afrique du Sud Un article de Wikipédia, l'encyclopédie libre. Pour les articles homonymes, voir BRIC. BRICS est un acronyme anglais pour désigner un groupe de cinq pays qui se réunissent en sommet annuels : Brésil, Russie, Inde, Chine et Afrique du Sud. Avant l'ajout de ce dernier pays en 2011, le groupe était appelé BRIC. Les cinq pays composant le BRICS sont pour la plupart considérés comme des grandes puissances émergentes, ils sont respectivement les sixième, neuvième, dixième, deuxième et vingt-neuvième puissances économiques mondiales (au sens du PIB nominal) [3] et septième, sixième, troisième, deuxième et vingt-cinquième en parité de pouvoir d'achat. Histoire[modifier | modifier le code] Origine du terme[modifier | modifier le code] « Les BRIC sont des pays à forte croissance, dont, au début du XXIe siècle, le poids dans l’économie mondiale augmente. Sommets du BRICS[modifier | modifier le code] Des pays appelés à peser de plus en plus selon les prévisions[modifier | modifier le code]
Centauri Dreams — Imagining and Planning Interstellar Exploration Everyday EBM DAVID: Gene Functional Classification What does this tool do? Quickly translate given gene IDs to corresponding gene names in a batch way Provide links for each genes to DAVID Gene Report for in-depth information Search functionally related genes within user's input gene list or genome Key Concepts of "Search Related Genes" Any given gene is associating with a set of annotation terms. If genes share similar set of those terms (annotation profile), they are most likely involved in similar biological mechanisms. The algorithm adopts kappa statistics to quantitatively measure the degree of the agreement how genes share the ~75,000 annotation terms collected by DAVID knowledgebase. For any given gene(s), the tool instantly searches and lists the related genes passed kappa similarity measurement threshold. Find Related Genes Tool is very different and complementary to the common gene clustering methods, such as homologous genes based on sequence similarity; protein families based on one common biological activity.
Conseil arctique Un article de Wikipédia, l'encyclopédie libre. Cet article présente des problèmes à corriger (liste). Vous pouvez aider à l'améliorer ou bien discuter des problèmes sur sa page de discussion. Il est à actualiser. Le Conseil de l'Arctique est un forum intergouvernemental traitant des problèmes rencontrés par les gouvernements des États ayant une partie de leur territoire dans l'espace arctique et par les peuples autochtones de la région. Les premières ébauches de ce Conseil datent de 1991, lorsque huit pays arctiques s'engagèrent dans un traité de Stratégie pour la protection de l'environnement arctique (en) (SPEA). Histoire[modifier | modifier le code] Le premier pas vers la formation du Conseil de l'Arctique est franchi en 1991 lorsque huit pays riverains signent la Arctic Environmental Protection Strategy (en) (AEPS). Participants[modifier | modifier le code] Logo de la présidence russe États membres[modifier | modifier le code] Les membres actuels du Conseil de l'Arctique sont :
Weird things start to happen when you stare into someone's eyes for 10 minutes Giovanni Caputo recruited 20 young adults (15 women) to form pairs. Each pair sat in chairs opposite each other, one metre apart, in a large, dimly lit room. Specifically, the lighting level was 0.8 lx, which Caputo says "allowed detailed perception of the fine face traits but attenuated colour perception." The participants' task was simply to stare into each other's eyes for 10 minutes, all the while maintaining a neutral facial expression. A control group of a further 20 participants also sat in a dimly lit room in pairs, but their chairs faced the wall and they stared at the wall. When the 10 minutes were over the participants filled out three questionnaires: the first was an 18-item test of dissociative states; the other two asked questions about their experience of the other person's face (or their own face if they were in the control group). The participants in the eye-staring group said they'd had a compelling experience unlike anything they'd felt before. Caputo, G. (2015).
Dr. Smith's ECG Blog How Water Shapes DNA Water molecules surround the genetic material DNA in a very specific way. Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have discovered that, on the one hand, the texture of this hydration shell depends on the water content and, on the other hand, actually influences the structure of the genetic substance itself. These findings are not only important in understanding the biological function of DNA; they could also be used for the construction of new DNA-based materials. The DNA's double helix never occurs in isolation; instead, its entire surface is always covered by water molecules which attach themselves with the help of hydrogen bonds. But the DNA does not bind all molecules the same way. "We've been able to verify that some of the water is bound stronger whereas other molecules are less so," notes Dr. Analyses of the genetic material were conducted at the HZDR by the doctoral candidate Hassan Khesbak. "DNA is, thus, a responsive material," explains Karim Fahmy.