温度对涡虫再生的影响

通过设置温度梯度,观察涡虫切割后再生时间及再生成活率,发现19℃－24℃为涡虫切割再生的适宜温度范围,22℃为最适温度。     

伯塞活脱气体的临界状态

研究了伯塞活脱气体的临界状态参量、对比物态方程 ,并分析讨论了与范德瓦尔斯气体的异同     

寒胁迫对小麦幼苗生理生化特性的影响

:0～ 4℃低温处理小麦幼苗 ,叶片中脯氨酸和可溶性蛋白含量大幅度提高 .不同小麦品种可溶性糖含量也有不同程度的增加 .抗寒性强的品种 ,3种物质积累较多     

宽温区CMOS倒相器的传输特性模型

在考虑了器件高温泄漏电流的前提下 ,建立了宽温区CMOS倒相器的传输特性模型 ,明确了制约CMOS电路高温性能的主要因素以及设计的关键之处 最后 ,用实验检验了该模型的合理性     

应用微型计算机提高数字压力表性能

针对扩散硅数字压力表所存在的非线性和温漂等问题分析并确立了对其实现补偿的方法,并利用单片机予以实现,最终使数字压力表的精度达到0．05级．     

FBG温度传感及解调的研究

从光纤光栅温度传感模型出发,分析研究光纤光栅的温度传感特性,比较裸光纤光栅与增敏光纤光栅的温度敏感性,在此基础上提出一种基于滤波法的光纤光栅解调系统,研究表明,此系统具有结构简单,操作方便,灵敏度高的优点。     

Integrated metabolism and epigenetic modifications in the macrophages of mice in responses to cold stress

The negative effects of low temperature can readily induce a variety of diseases. We sought to understand the reasons why cold stress induces disease by studying the mechanisms of fine-tuning in macrophages following cold exposure. We found that cold stress triggers increased macrophage activation accompanied by metabolic reprogramming of aerobic glycolysis. The discovery, by genome-wide RNA sequencing, of defective mitochondria in mice macrophages following cold exposure indicated that mitochondrial defects may contribute to this process. In addition, changes in metabolism drive the differentiation of macrophages by affecting histone modifications. Finally, we showed that histone acetylation and lactylation are modulators of macrophage differentiation following cold exposure. Collectively, metabolism-related epigenetic modifications are essential for the differentiation of macrophages in cold-stressed mice, and the regulation of metabolism may be crucial for alleviating the harm induced by cold stress.     

贮存方法和时间对蔬菜中硝酸盐和亚硝酸盐的影响

为研究蔬菜中硝酸盐和亚硝酸盐含量随时间变化的规律,采取4℃冷藏和-4℃冷冻2种方式分别贮存叶菜类、瓜果类和根茎类蔬菜,在不同时间分别测定蔬菜中硝酸盐和亚硝酸盐的含量.结果表明,随着贮存时间的延长,蔬菜中亚硝酸盐含量均呈增加趋势,贮存时间越长,增加越为显著;硝酸盐则逐渐降低.贮存时间相同时,与冷冻保存相比,冷藏条件贮存的蔬菜中亚硝酸盐增加速率更为明显.     

Influence of Zeotropic Mixtures＇ Performance of Heat Transfer in Temperature Gliding on the Condenser or Evaporator

Many zeotropic refrigerant mixtures are proposed as alternatives to some chlorofluorocarbons（CFCs） and hydrochlorofluorocarbons （ HCFCs ）. An advantage of zeotropic mixtures is the possibility of reduction in entropy generation by matching the temperature glidings of refrigerant and heat-transfer fluid in both condenser and evaporator. Zeotropic mixtures are compared with pure refrigerants to evaluate their exergetic losses. On the other hand, the special phenomena which result from temperature gliding are proved by experiments. A simple equation is obtained, to evaluate different zeotropic mixtures＇ exergetic losses. The maximum flow rate of heat-transfer fluids is found in order that refrigerants phase change can be completed. Lastly, some examples of zeotropic mixtures （R407C, R405A and R414B） are given, and their exergetic losses and maximum flow rate of heat-transfer fluids in condenser are forecasted.