GRB 990413: insight into the thermal phase evolution

GRB 990413: Insight into the thermal phase evolution

GRB 990413 shows a very hard spectrum (with a low energy spectral component F (ν) ∝ ν) which is well represented by a black body model with characteristic temperature ∼ 70 keV. It thus belongs to the subset of GRBs which might be revealing a thermal phase. We find that the temperature/luminosity evolution is consistent with that found in the other “thermal” GRBs. The time resolved spectral anal...

Mitophagy: New Insight into the Cardiovascular Aging  

Cyanobacterial Evolution: Fresh Insight into Ancient Questions

The invention of oxygenic photosynthesis by cyanobacteria 2.4 billion years ago forever transformed Earth. This biogeochemical shift set into motion the evolution of subsequent microbial metabolisms and lifestyles. A new study provides a novel approach in piecing together evidence for how this evolutionary transition may have occurred.

New Insight into the Relation between Adiponectin and Diabetes

Diabetes mellitus is a group of metabolic diseases. Insulin resistance is defined as a state that needs more insulin to get the biological effects achieved by a lower amount of insulin in the normal state. Several molecules which are secreted through adipocytes have been involved in insulin resistance and type 2 diabetes mellitus. Adiponectin as a 244 amino acid protein is exclusively expressed...

A Naturalist's Insight into the Evolution of Signal Redundancy.

Why are animal signals so complex? This question continues to attract the interest of behavioral and evolutionary ecologists. In this Countdown article, we revisit a littleappreciated article in The American Naturalist published in 1970: “An Estimation of Redundancy and Information Content of Anole Dewlaps” by A. Stanley Rand and Ernest E. Williams (fig. 1). As part of this piece, Rand and Will...