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Etude BPA et phtalates citées par envoyé spécial ce soir. En la lisant, elle démontre que 20 personnes qui ont ingéré moins de phtalates que d'habitude pendant 3 jours ont éliminé moins de phtalates dans leurs urines pendant 3 jours.
in list: science
60,000 peer-reviewed papers, including the first peer-reviewed scientific research journal in the world, are now available free online. The Royal Society has opened its historical archives to the public. Among the cool stuff you’ll find here: Issac Newton’s first published research paper and Ben Franklin’s write-up about that famous kite experiment. Good luck getting anything accomplished today. Or ever again.
in list: science
"Tout, mais absolument tout sur l’embryologie humaine !
Aujourd’hui, j’ai envie de vous faire partager un site. Non, non, rien de spectaculaire mais il m’a scotché car c’est une véritable mine d’informations. Le biologiste en moi s’en pourlèche les babines. Il ne se lasse pas de parcourir le site et d’emmagasiner plein de détails tous plus intéressantes les uns après les autres.
J’ai nommé : embryologie.ch. Ce site est littéralement un cours d’embryologie en ligne développé en collaboration par les Universités Suisses de Fribourg, Lausanne et Berne sous l’égide du Campus Virtuel Suisse."
in list: science
via @anhtuann
One often hears news reports about discoveries of a “gene for X”, e.g., gene for alcoholism, gene for homosexuality, gene for breast cancer, etc. This is an incorrect way of thinking about genes, as it implies a one-to-one mapping between genes and traits.
This misunderstanding stems from historical precedents. The very first genes were discovered decades ago with quite primitive technology. Thus, the only genes that could be discovered were those with large, dramatic effects on the traits. For instance, a small mutation (change in the sequence of nucleotides) in the gene that codes for RNA that codes for one of the four elements of the hemoglobin protein results in sickle-cell anemia. The red blood cells are, as a result, misshapen and the ability of red blood cells to carry sufficient oxygen to the cells is diminished.
Due to such dramatic effects of small mutations, it was believed at the time that each gene codes for a particular trait. Today, it is possible to measure minuscule effects of multiple genes and it is well understood that the “one gene/one trait” paradigm is largely incorrect. Most traits are affected by many genes, and most genes are involved in the development of multiple traits.
in list: science
What makes one cell type different from the other cell types? After all, each cell in the body has exactly the same genome (the entire DNA sequence). How do different cells grow to look so different and to perform such different functions? And how do they get to be that way, out of homogenous (single cell type) early embryonic cells that are produced by cell division of the zygote (the fertilized egg)? via @pierrekerner
in list: science
Les ressources scientifiques et techniques en libre accès constituent un fonds documentaire complémentaire assez conséquent : environ 20% des articles scientifiques sont accessibles gratuitement. Si l’accès à ces ressources scientifiques est un enjeu important, l’exploitation de celles-ci en est un autre. Entre les nombreuses archives ouvertes (institutionnelles, thématiques et centrales) et les revues scientifiques en libre accès, il n’est pas toujours évident pour le chercheur de s’y retrouver. L’objectif de cet article est donc de présenter quelques « outils » qui facilitent la recherche documentaire et la mise en place d’une veille scientifique des ressources en libre accès.
The results from the 179 responses received provides a first take of science journalism in Latin America.
It turns out that science journalists working in the region are mostly female (60 per cent), aged under 40 (60 per cent) and have full-time jobs (60 per cent). The majority said their outlets are newspapers, magazines and the Internet — the media most likely to cover science. (...)
in list: science
measles, smallpox... A visual reminder of what vaccines have got rid of over the past few years. via @pierrekerner
in list: science
Formidable recueil de liens sur le journalisme scientifique. Profession vue sous tous les angles. Par @fuzzyraptor
in list: science
Symmetry is a magazine about particle physics and its connections to other aspects of life and science, from interdisciplinary collaborations to policy to culture. It is published 6 times per year by Fermi National Accelerator Laboratory and SLAC National Accelerator Laboratory, both national laboratories funded by the Office of Science of the US Department of Energy.The magazine is published in print and electronic editions, and anybody can subscribe free of charge through our subscription form.
ARCHIVE: EXPLAIN IT IN 60 SECONDS (Big Band, Synchrotron Radiation, Neutrinos...)
via @mfavez
for later. via @pierrekerner
En 1982, le Dr Martineau, alors soutenu par Pêches et Océans Canada (Dr Pierre Béland), mettait sur pied un programme d’examen post-mortem systématique des bélugas échoués le long des côtes de l’estuaire du Saint-Laurent. Pêches et Océans Canada (Dre Lena Measures) contribue toujours au financement de ce programme. (...)
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