SVT monde
Sur le Web

Nouveautés sur le Web

Articles les plus récents

Palaeoclimatology: Tropics feel effect of iceberg thaw

mercredi 3 juin 2015
Prehistoric icebergs in the North Atlantic had a greater influence on tropical climate than was previously thought.Rachael Rhodes of Oregon State University in Corvallis and her colleagues constructed a 60,000-year methane record from a west Antarctic ice core. They found elevated methane (...)

Materials: Memory metal sets flex record

mercredi 3 juin 2015
An alloy that can bend and return to its original shape at least 10 million times could prove useful in applications including medical devices and refrigeration.Bending a 'shape-memory alloy' changes its crystal structure from one phase to another, whereas applying heat reverses that (...)

Volcanology: New islands reveal Red Sea rifting

mercredi 3 juin 2015
Two volcanic islands that have emerged in the southern Red Sea suggest that the area is more geologically active than was thought.Sholan Island surfaced in December 2011 and Jadid Island appeared in October 2013, forming part of the Zubair archipelago (pictured). Seismic data (...)

Biotechnology: Gene therapy halts type 1 diabetes

mercredi 3 juin 2015
Transferring part of an insulin gene into liver cells triggers a specific immune response that protects mice from one form of diabetes.Type 1 diabetes occurs when T cells target and kill insulin-producing islet cells in the pancreas. Maria Grazia Roncarolo of Stanford University (...)

Corrigendum: A new arboreal haramiyid shows the diversity of crown mammals in the Jurassic period

mercredi 3 juin 2015 par Xiaoting Zheng, Shundong Bi, Xiaoli Wang, Jin Meng
Nature500, 199–202 (2013); doi:10.1038/nature12353In Fig. 2a of this Letter the tooth P3 should be horizontally flipped, as shown in Fig. 1 of this Corrigendum. We thank Z-X. Luo, T. Martin and C-F. Zhou for pointing

Health plan

mercredi 3 juin 2015
Proposals to improve the international emergency response to disease outbreaks in the wake of the Ebola epidemic should be implemented — but local solutions are the best defence.

To Pluto

mercredi 3 juin 2015
The coming months promise to shed new light on the Solar System’s underworld.

Spastin and ESCRT-III coordinate mitotic spindle disassembly and nuclear envelope sealing

mercredi 3 juin 2015 par Marina Vietri, Kay O. Schink, Coen Campsteijn, Catherine Sem Wegner, Sebastian W. Schultz, Liliane Christ, Sigrid B. Thoresen, Andreas Brech, Camilla Raiborg, Harald Stenmark
At the onset of metazoan cell division the nuclear envelope breaks down to enable capture of chromosomes by the microtubule-containing spindle apparatus. During anaphase, when chromosomes have separated, the nuclear envelope is reassembled around the forming daughter nuclei. How the nuclear (...)

A noisy linear map underlies oscillations in cell size and gene expression in bacteria

mercredi 3 juin 2015 par Yu Tanouchi, Anand Pai, Heungwon Park, Shuqiang Huang, Rumen Stamatov, Nicolas E. Buchler, Lingchong You
During bacterial growth, a cell approximately doubles in size before division, after which it splits into two daughter cells. This process is subjected to the inherent perturbations of cellular noise and thus requires regulation for cell-size homeostasis. The mechanisms underlying the control (...)

Receptor-mediated selective autophagy degrades the endoplasmic reticulum and the nucleus

mercredi 3 juin 2015 par Keisuke Mochida, Yu Oikawa, Yayoi Kimura, Hiromi Kirisako, Hisashi Hirano, Yoshinori Ohsumi, Hitoshi Nakatogawa
Macroautophagy (hereafter referred to as autophagy) degrades various intracellular constituents to regulate a wide range of cellular functions, and is also closely linked to several human diseases. In selective autophagy, receptor proteins recognize degradation targets and direct their (...)

Accueil du site | Contact | Plan du site | Espace privé | Statistiques | visites : 1563007

Suivre la vie du site fr    ?

Site réalisé avec SPIP 1.9.2e + ALTERNATIVES

Creative Commons License