Oxygen breaks into carbon world

DNA Double-Strand Breaks Come into Focus

The Mre11-Rad50-Nbs1 (MRN) complex senses DNA double-strand breaks and recruits different repair pathway and checkpoint proteins to break foci. Two new studies (Williams et al., 2009; Lloyd et al., 2009) identify Nbs1 as a key factor in this process and reveal how an N-terminal protein recruitment module in Nbs1 binds to different response factors through shared phosphopeptide motifs.

Inserting Micro-Breaks into Crowdsourcing Workflows

Participants in human computation workflows may become fatigued or get bored over long, interminable working hours. This leads to a slump of motivation and morale, which in the long run causes reductions in both productivity and work quality. In this paper we propose an initial investigation into possible ways to alleviate worker fatigue and boredom by employing micro-breaks that provide timely...

Wondrous World of Carbon Nanotubes

The Secretion of Oxygen into the Swim-bladder of Fish I I. The simultaneous transport of carbon monoxide and oxygen

ABSTRAOT Toadfish, Opsanus tau, L., were maintained in sea water equilibrated with gas mixtures containing a fixed proportion of oxygen and varying proportions of carbon monoxide. The swim-bladder was emptied by puncture, and, after an interval of 24 or 48 hours, the newly secreted gases were withdrawn and analyzed. Both carbon monoxide and oxygen are accumulated in the swim-bladder at tensions...

Wondrous World of Carbon Nanotubes

Carbon nanotubes are generally produced by three main techniques, arc discharge, laser ablation and chemical vapour deposition. Though scientists are researching more economic ways to produce these structures. In arc discharge, a vapour is created by an arc discharge between two carbon electrodes with or without catalyst. Nanotubes self-assemble from the resulting carbon vapour. In the laser ab...