ASTROPHYSICS: Polarized Snaps

BiophysicsHelicase snaps back : Nature

Proteins of the helicase family are essential for almost all biological processes involving nucleic acids such as DNA, from the replication of the genome to the production of proteins . Although these enzymes are mainly known for their ability to unwind DNA or RNA helices, it has become increasingly clear that they can have many other activities. For example, helicases can displace proteins fro...

Cold snaps, heatwaves, and arthropod growth

1. Arthropod performance is a non-linear function of temperature, and thus global climate change may impact arthropods in a variety of non-obvious ways. 2. In this paper, the well-known thermal performance curve is reviewed briefly and attention is drawn to the importance of variance in temperature, particularly major weather events such as cold snaps and heatwaves. 3. A model is developed that...

ASTRONOMY AND ASTROPHYSICS Power spectrum of the polarized diffuse Galactic radio emission

We have analyzed the available polarization surveys of the Galactic emission to estimate to what extent it may be a serious hindrance to forthcoming experiments aimed at detecting the polarized component of Cosmic Microwave Background (CMB) anisotropies. Regions were identified for which independent data consistently indicate that Faraday depolarization may be small. The power spectrum of the p...

Transfer of Polarized Light in Planetary Atmospheres Astrophysics and Space Science Library

Astrophysics.

Using the oscillation frequencies of α Cen A recently discovered by Bouchy & Carrier (2001, 2002), the available astrometric, photometric and spectroscopic data, we tried to improve the calibration of the visual binary system α Cen. With the revisited masses of Pour-baix et al. (2002) we do not succeed to obtain a solution satisfying all the seismic observational constraints. Relaxing the const...