Anacystis nidulans cells grown under high (3%) CO(2) partial pressure have greater phycocyanin to chlorophyll ratio (Phc/Chl) relative to cells grown under low (0.2%) CO(2) tension (Eley (1971) Plant Cell Physiol 12: 311-316). Absorbance difference spectrophotometry of A. nidulans thylakoid membranes in the ultraviolet (DeltaA(320)) and red (DeltaA(700)) regions of the spectrum reveal photosyst...

Small gas-phase gold cluster cations are essentially inert toward molecular oxygen. Preadsorption of molecular hydrogen, however, is found to cooperatively activate the binding of O(2) to even-size Au(x)(+) (x = 2, 4, 6) clusters. Measured temperature- and reaction-time-dependent ion intensities, obtained by ion trap mass spectrometry, in conjunction with first-principles density-functional the...

The final step of the water formation network on interstellar grain surfaces starting from the H + O2 route is the reaction between H and H2O2. This reaction is known to have a high activation energy and therefore at low temperatures it can only proceed via tunneling. To date, however, no rate constants are available at temperatures below 200 K. In this work, we use instanton theory to compute ...

Epidemiology is concerned with the distribution and determinants of disease frequency in human populations (Daniels, Flanders, Eley, & Boring, 1993) Basic to an understanding of Epidemiology is the tenet that disease does not affect everybody equally or at random, but that there are determinants that place some people at a higher risk of developing a disease because of genetic predisposition, e...

This book is the most comprehensive and clear text for learning dynamics and many related topics of fractals and complexity that I have encountered. I t is appropriate for both classroom use, and for scientists working in a wide variety of fields. The emphasis is on concepts and applications rather than proofs and derivations. I t is ' hands-on' , with practical exercises and a programming proj...

Eley HL, Russell ST, Tisdale MJ. Mechanism of attenuation of muscle protein degradation induced by tumor necrosis factorand angiotensin II by -hydroxy-methylbutyrate. Am J Physiol Endocrinol Metab 295: E1417–E1426, 2008. First published October 7, 2008; doi:10.1152/ajpendo.90567.2008.—Both tumor necrosis factor(TNF)/interferon(IFN) and angiotensin II (ANG II) induced an increase in total protei...

The mobility of O atoms at very low temperatures is not generally taken into account, despite O diffusion would add to a series of processes leading to the observed rich molecular diversity in space. We present a study of the mobility and reactivity of O atoms on an amorphous silicate surface. Our results are in the form of reflection absorption infrared spectroscopy and temperature-programmed ...

Single atom catalysts (SACs) are highly desirable for the effort to maximize the efficiency of metal atom use. However, the synthesis of SACs is a major challenge that largely depends on finding an appropriate supporting substrate to achieve a well-defined and highly dispersed single atom. This work demonstrates that, based on the density functional theory (DFT) calculation, graphyne is a good ...

Eley HL, Russell ST, Baxter JH, Mukerji P, Tisdale MJ. Signaling pathways initiated by -hydroxy-methylbutyrate to attenuate the depression of protein synthesis in skeletal muscle in response to cachectic stimuli. Am J Physiol Endocrinol Metab 293: E923–E931, 2007. First published July 3, 2007; doi:10.1152/ajpendo.00314.2007.—To investigate the mechanism by which -hydroxy-methylbutyrate (HMB) at...