نتایج جستجو برای: 143a
تعداد نتایج: 31 فیلتر نتایج به سال:
Abstract. The emissions of hydrofluorocarbons (HFCs) have increased significantly in the past 2 decades, primarily as a result phaseout ozone-depleting substances under Montreal Protocol and use HFCs their replacements. In 2015, large increases were projected HFC this century absence regulations, contributing up to 0.5 ?C global surface warming by 2100. 2019, Kigali Amendment came into force wi...
Solubility (vapor pressure) , viscosity and density have been experimentally determined for thirty-five potential refrigeration working fluids. Properties for low refrigerant concentration mixtures (0, 10, 20 and 30 weight percent refrigerant) were determined over the temperature range 0 to IOO•C (32 to 212"F) or to the critical temperature of the refrigerant, and pressure range 0 to 3,500 kPa ...
BACKGROUND Mutations in EFTUD2 were proven to cause a very distinct mandibulofacial dysostosis type Guion-Almeida (MFDGA, OMIM #610536). Recently, gross deletions and mutations in EFTUD2 were determined to cause syndromic esophageal atresia (EA), as well. We set forth to find further conditions caused by mutations in the EFTUD2 gene (OMIM *603892). METHODS AND RESULTS We performed exome seque...
La razón fundamental por la que, según cierto modelo historiográfico el Parménides platónico constituye un diálogo de crisis en desarrollo del pensamiento Platón, es supuesta presencia él una crítica Teoría las Ideas período medio –Fedón, Banquete, República. insuficiencia esa teoría consistiría concepción como unidades absolutamente simples y completamente aisladas que les impediría cumplir fu...
In the present paper, the measurements of the bubble-point pressures and the liquid densities of refrigerant mixtures composed ofR-32, R-125 and/orR-143aarereportedfortemperaturesfrom 280to 320 Kin 10 Kintervals and for entire compositions. An experimental apparatus used is a magnetic densimeter coupled with a variable volume cell. Based on the measured bubble-point pressures, the optimization ...
R-502 has been the primary refrigerant for low temperature commercial refrigeration applications for many years. The impending phase-out of CFCs dictates its elimination in the very near future. The identification of alternative(s) for R-502 therefore becomes a high priority. This paper addresses the factors to be evaluated in selecting the best replacement and identifies an azeotropic mixture ...
Abnormal differentiation of muscle is closely associated with aging (sarcopenia) and diseases such as cancer and type II diabetes. Thus, understanding the mechanisms that regulate muscle differentiation will be useful in the treatment and prevention of these conditions. Protein lysine acetylation and methylation are major post-translational modification mechanisms that regulate key cellular pro...
Reversible inhibitors of the cell cycle such as the TGF-betas have been exploited to protect dividing cells from exposure to anticancer drugs and radiation. Here, rat embryo fibroblast (REF) lines expressing different p53 mutations were used to test whether the p53 growth arrest could also chemoprotect cells from high doses of anticancer drugs. Whereas the doubling times of the different REF li...
The imminent phaseout of R-11, R-12, and R·llS because of their high ozone depletion potentials has prompted many independent investigations of alternative or subst:i t:uee refrigeranes, ei eher as pure compounds or as mixtures of t:wo or more environmentally acceptable fluids. There are several motivations for investigating mixtures. There are very few pure compounds which can be used for refr...
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