昆虫寄生菌代谢产物的开发利用

在自然界,许多昆虫亦会被微生物侵染,而这些侵染昆虫的微生物会产生多种多样的代谢产物,如有杀虫物质、抗生物质、免疫物质等。这些物质可以用于微生物农药、新药制剂以及免疫制剂等,有许多产品已经在国内外市场开发利用。     

一种新型偏转线圈的大偏转角技术

为了利用现有 CRT颜色逼真、分辨率高、技术成熟等优点 ,克服其体积大、笨重的不足 ,提出将两组平面主线圈和两组圆柱形辅助线圈组成一个全新的偏转线圈 ,利用这种新型偏转线圈制作成的 CRT能较大幅度减薄显像管的厚度 ,并在保证图像质量前提下实现电子束的大角度偏转 .实验结果表明 ,电子束最大偏转角可达 1 2 6°以上 ,光点测试结果良好 ,电子束聚焦特性有所改善     

海水电池用二氯化铅阴极性能的研究

用大幅度动电位扫描法(扫描速度为500mV/min、2mV/min)对二氯化铅电极的阴极还原性能作了研究。从实验所得的曲线中,可以求得电极的电压滞后性能、极化性能和电极活性物质利用率等。研究了电极性能与电极组成和结构的关系。     

精细小件化学热处理滚筒炉的研制

研制了适于精细小零件大批量化学热处理的滚筒炉,有效地解决了薄片状小零件在其它类型炉中散料处理时,由于零件相互堆叠、不能更位而导致加热和与活性气氛接触不均匀所带来的质量问题。为照相机、仪表、标准件等行业提供了一种新型工艺装备。     

女性亚健康的日常调理与饮食保健

随着女性社会地位的不断提高,社会对女性群体的关注程度也不断增强。女性的健康问题,对其家庭、社会的影响也越来越大。如何预防女性疾病的发生,避免和预防女性亚健康的问题已经成为人们研究的重要课题。     

Simulating FAS-induced apoptosis by using P systems

In contrast to differential equations, P systems are an unconventional model of computation which takes into consideration the discrete character of the quantity of components and the inherent randomness that exists in biological phenomena. The key feature of P systems is their compartmentalised structure which represents the heterogeneity of the structural organisation of the cells, and where one can take into account the role played by membranes in the functioning of the system, for example signalling at the cell surface, selective uptake of substances from the media, diffusion across different compartments, etc. We show here that P systems can be a reliable tool for Systems Biology and could even outperform in some cases the current simulation techniques based on differential equations. We will also use a strategy based on the well known Gillespie algorithm but running on more than one compartment called Multi-compartmental Gillespie Algorithm.     

Genetic background of phenotypic variation

A noteworthy feature of the living world is its bewildering variability. A key issue in several biological disciplines is the achievement of an understanding of the hereditary basis of this variability. Two opposing, but not necessarily irreconcilable conceptions attempt to explain the underlying mechanism. The gene function paradigm postulates that phenotypic variance is generated by the polymorphism in the coding sequences of genes. However, comparisons of a great number of homologous gene and protein sequences have revealed that they predominantly remained functionally conserved even across distantly related phylogenic taxa. Alternatively, the gene regulation paradigm assumes that differences in the cis-regulatory region of genes do account for phenotype variation within species. An extension of this latter concept is that phenotypic variability is generated by the polymorphism in the overall gene expression profiles of gene networks. In other words, the activity of a particular gene is a system property determined both by the cis-regulatory sequences of the given genes and by the other genes of a gene network, whose expressions vary among individuals, too. Novel proponents of gene function paradigm claim that functional genetic variance within the coding sequences of regulatory genes is critical for the generation of morphological polymorphism. Note, however, that these developmental genes play direct regulatory roles in the control of gene expression.     

探测地下管线接口的频率域电磁法研究

根据频率域中感应法探测金属管线的二次磁场分布，分析了感应电流形成机理和传输特征，讨论了由管线深度变化引起的异常规律。研究结果表明，频率域电磁法探测地下金属管线时，由于信号受金属管线内部电流线场的影响，管线接口的非金属介质将导致观测信号衰减。针对这种信号衰减在探测结果中易与管线变深处异常特征混淆的问题，提出了运用比值参数对两种异常有效地加以区分的方法。     

恩格斯“末世”论探析——《自然辩证法》中的“终极关怀”

恩格斯的《自然辩证法》包含着一种"末世"论的观点。任何事物的发展都有一个终结,整个宇宙的命运也是这样。永恒发展是物质永恒循环中的发展,对人类历史和人自身价值的理解应当置于这个大背景之下。恩格斯的"末世"论受到了基督教思想的影响,又是立足当时科学成果对宗教神学的批判,是对人的历史命运和人自身价值的"终极关怀"。     

超长电力隧道被遮挡固壁间接吸热效果分析

为量化隧道被遮挡固壁间接吸热的效果，采用数值模拟的方法，研究超长隧道与土壤内部温度分布特征。结果表明，被遮挡固壁内部会形成明显的切向温度梯度，通过切向传热间接吸收隧道内空气中的热量，相当于将吸热面积增大15%～30%。为将间接吸热效应纳入隧道固壁吸热量的计算中，引入遮挡修正系数，并根据数值结果给出遮挡修正系数与隧道长度间的关联式，以便于工程实际中的应用。