正构烷烃的氧化以制取合成脂肪酸的研究

试验了国产的各种硬蜡及软蜡,确定了它们的氧化可能性。提出了可供工业上应用的加速氧化反应的二个方法:改善加入催化剂的方法及在泡沫状态下进行氧化。 对於简化分离氧化蜡亦提出了新方案。 文中还叙述了在氧化初期催化剂的作用,对工艺过程的控制有一定的帮助。     

Regional blood redistribution following blood loss in unanesthetized rats

The authors describe relative changes in the blood filling of 46 vascular areas of the body in rats after a moderate and severe blood loss. Moderate blood loss caused redistribution of the blood from the skin of the chest and from the skin of the posterior limbs, the majority of the abdominal and pelvis minor organs, muscular and bone tissues of the abdomen, pelvis minor and extremities into the brain, heart, lungs, kidneys, stomach and into the muscles of the head and neck. In severe blood loss the changes were analogous, but the blood content in the kidneys and the stomach decreased, and there was also a relative elevation of the blood in the muscles and bones of the chest. The intensity of the redistributive reaction in severe blood loss was less than in moderate blood loss.     

Effect of rolling conditions on the recrystallization and strength of nickel under stress at high temperatures

Metal Science and Heat Treatment -     

The functional activity of the portal vein as a reflection of the metabolic changes in experimental chronic kidney failure

Current therapeutic efforts to treat chronic and progressive neurodegenerative disease include, for the first time, attempts to regenerate affected nervous tissue using neurotrophic factors. The rationale for using trophic factors includes the understanding that they support neuronal survival and regrowth processes. The potential benefits of trophic factor therapy will be no more realized in the near future than in the treatment of amyotrophic lateral sclerosis (ALS). ALS is pathologically characterized by the selective degeneration of specific populations of cranial and spinal motoneurons. Evidence for the existence of factors that support motoneurons has come from studies demonstrating that motoneurons receive trophic influences from various tissues, both central and peripheral, within their local environment. Although the identity of these putative tissue-derived factors has remained enigmatic, recent studies have demonstrated that several previously characterized trophic factors exhibit trophic influences on motoneurons. Among these are several members of the neurotrophin family, most notably brain-derived neurotrophic factor. These neurotrophins meet most of the criteria to be considered motoneuron trophic factors: they are locally available to motoneurons in vivo; motoneurons express specific receptors for these factors; and exogenous application of these factors mimicks the effects of the uncharacterized endogenous agents. The clinical use of these factors for the treatment of ALS, therefore, appears to be scientifically justified.     

A comparison of two bench‐scale anaerobic systems used for the treatment of dairy effluents

The objective of this work was to compare two anaerobic reactor configurations, a hybrid upflow anaerobic sludge blanket (UASBh) reactor and an anaerobic sequencing batch reactor with immobilised biomass (ASBBR) treating dairy effluents. The reactors were fed with effluent from the milk pasteurisation process (effluent 1—E1) and later with effluent from the same process combined with the one from the cheese manufacturing (effluent 2—E2). The ASBBR reactor showed average organic matter removal efficiency of 95.2% for E1 and 93.5% for E2, while the hybrid UASB reactor showed removal efficiencies of 90.3% and 80.1% respectively.     

安森美半导体针对家庭娱乐应用的音视频、电源管理和电路保护方案

详细介绍了安森美半导体音频、视频、开关控制器、电压监控器、抑制EMI、微控制器、接口滤波及保护等解决方案。