PURPOSE To examine the inotropic and chronotropic effects of xenon (Xe) and nitrous oxide (N2O) compared with nitrogen (N2) on isolated rat hearts. The differences between Xe and N2O were also compared. METHODS The effects of Xe, N2O and N2 on coronary perfusion pressure (CPP), heart rate, left ventricular developed pressure (LVDP) and double product (DP) were examined in isolated rat hearts ...

Azorhizobium caulinodans employs both cytochrome bd (cytbd; quinol oxidase) and cytcbb3 (cytc oxidase) as terminal oxidases in environments with very low O2 concentrations. To investigate physiological roles of these two terminal oxidases both in microaerobic culture and in symbiosis, knockout mutants were constructed. As evidenced by visible absorbance spectra taken from mutant bacteria carryi...

The sensory, microbiological and physicochemical attributes of fresh meat stored at 5 and 15 degrees C were affected by the combined effect of volatile compounds of oregano essential oil and modified atmosphere packaging conditions (40% CO2/30% N2/30% O2, 100% CO2, 80% CO2/20% air, vacuum pack and air). It was found that the extension of shelf life of meat samples depended on the packaging cond...

To improve our understanding of the absorption of solar radiation in the atmosphere we have characterized the spectral absorption, the spatial and temporal abundance, and the radiative forcing of the oxygen collision pairsO2 O2 andO2 N2 (O2 X O2 O2 + O2 N2). The regional, vertical, seasonal, and annual patterns of O2 X abundance and radiative forcing are obtained from a general circulation mode...

The results of an experimental study of the combustion of single aluminum particles in N2/O2, Ar/O2, and He/O2 gas mixtures, and in pure O2 are presented and interpreted. This research focuses on identifying conditions under which asymmetric combustion of the aluminum particles develops. It also illustrates the relationship between aluminum particle combustion behavior and particle internal and...

The plasma electrolysis method using N2 and O2 injection is an effective environmentally friendly solution for nitrogen fixation into nitrate ammonia. reaction pathway, the effect of gas composition are important parameters in understanding mechanism effectiveness these processes. This study aims to determine formation pathway ammonia by observing role reactive species as well intermediate comp...

It has previously been shown that addition of catecholamines to a suspension of trout erythrocytes induces an enlargement of the cells owing to an uptake of NaCl mediated by a cAMP-dependent, amiloride-sensitive Na+/H+ exchange. In this article, we show that the change in cell volume induced by catecholamines is much greater when the erythrocytes are incubated in N2 than when they are in O2. Th...

respiration is one of the important factors to be considered in a determination of the quality of cut flowers during their postharvest preservation period. modified atmospheric packaging (map) is an effective way of reducing respiration rate along with increasing vase life while the quality of cut flowers also well maintained. this research was conducted on the basis of a factorial experiment, ...

We present laboratory data on pure, layered and mixed CO and O2 ices relevant for understanding the absence of gaseous O2 in space. Experiments have been performed on interstellar ice analogues under ultra high vacuum conditions by molecular deposition at 14 K on a gold surface. A combination of reflection absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD) is u...