Transcription in tight quarters

Transcription in tight spaces

n meiosis II, vertebrate oocytes undergo a cell cycle arrest that is maintained until fertilization, but it has been difficult to identify the factors responsible for this process. By screening a novel cDNA library, Lefebvre et al., page 603, have discovered and characterized a protein that specifically regulates meiosis II spindle integrity during arrest. The work helps to explain how the cell...

Pantry, Kitchen & Servant's Quarters

Comfortable Quarters for Rabbits in Research Institutions

In the past, laboratory rabbits have usually been kept singly in small cages that provide neither social nor environmental enrichment, and frequently the cages have been too small to permit some normal behaviors such as sitting up on the hind legs, hopping, digging, and hiding. Stereotypical bar licking or chewing, pawing at the corners of the cage, psychogenic polydipsia, and excessive self-gr...

Nitric oxide concentrations in mammary quarters during heifer mastitis.

The aim of this study was to evaluate nitric oxide (NOx) concentration in infected and non-infected mammary quarters of dairy heifers before and after calving. The relationship between bacterial species and NOx concentrations, as well as correlation between NOx concentrations and postpartum somatic cell count (SCC), was assessed. Coagulase-negative staphylococci, Staphylococcus aureus and Esche...

An aerial robot prototype for situational awareness in closed quarters

More often homeland security, disaster mitigation and military operations are performed in urban environments. Time consuming, labor intensive and possibly dangerous tasks like bomb detection, searchand-rescue and reconnaissance done with robots could save resources. An aerial robot capable of flying in closed quarters like warehouses, stadiums, underground parking lots and tunnels is featured....