3-(6-溴吡啶-2)-2-(2-氟-6-氯苯)-噻唑酮-4的电子结构与抗HIV活性间关系的量子化学研究

采用AM1方法,对3-(6-溴吡啶-2)-2-(2-氟-6-氯苯)-噻唑酮-4(BPFCTZO)进行了量子化学计算,给出了分子的几何构型、原子的净电荷、键级、前沿分子轨道组成与能级、前沿轨道电子密度等参数.结果表明BPFCTZO分子的稳定构型呈蝴蝶状,噻唑酮环为主活性区,其上的2位C、4位N和6位O等原子很可能是其与RT酶作用的活性位点.     

Active changes of lignification-related enzymes in pepper response to Glomus intraradices and/or Phytophthora capsici

INTRODUCTION Plants have defense mechanisms against patho-gen infection by inducing systemic resistance in re-sponse to localized pretreatment with biological cotrol agents, thus making them resistant to subsequpathogen infection (Caruso et al., 1999; Hammschmidt, 1999; Mohammadi and Kazemi, 2002; yada et al., 1995; Pozo et al., 2002; Ray et al., 199Biological control of plant pathogens has receivmuch more attention. It is well known that plants amicroorganisms symbiosis is a defense m…     

基于EtherCAT的从站设计

现场总线已经成为自动化控制技术重要组成部分,通过大量的实践实验与测试,如今已经获得广泛的应用。Ether CAT具有良好的实时能力,适应小数据量通信,并且价格经济,在工业控制上得到广泛的应用。但由于Ether CAT从站设计必须使用专门的芯片,导致从站的硬件设计复杂、调试困难、成本增加。文章采用AM3358 Cortex A8处理器外加以太网物理层收发器(PHY)的方案,由于AM3358片内集成工业用通信子系统(PRU-ICSS)可以实现Ether CAT协议,因此只要外加PHY就可以成为Ether CAT从站。     

Mycorrhizoremediation an enhanced form of phytoremediation

Study of plant roots and the diversity of soil micro biota, such as bacteria, fungi and microfauna associated with them, is important for understanding the ecological complexities between diverse plants, microbes, soil and climates and their role in phytoremediation of contaminated soils. The arbuscular mycorrhizal fungi （AMF） are universal and ubiquitous rhizosphere mi- croflora forming symbiosis with plant roots and acting as biofertilizers, bioprotactants, and biodegraders. In addition to AMF, soils also contain various antagonistic and beneficial bacteria such as root pathogens, plant growth promoting rhizobacteria including free-living and symbiotic N-fixers, and mycorrhiza helping bacteria. Their potential role in phytoremediation of heavy metal （HM） contaminated soils and water is becoming evident although there is need to completely understand the ecological complexities of the plant-microbe-soil interactions and their better exploitation as consortia in remediation strategies employed for contaminated soils. These multitrophic root microbial associations deserve multi-disciplinary investigations using molecular, biochemical, and physiological techniques. Ecosystem restoration of heavy metal contaminated soils practices need to incorporate microbial biotechnology research and development. This review highlights the ecological complexity and diversity of plant-microbe-soil combinations, particularly AM and provides an overview on the recent developments in this area. It also discusses the role AMF play in phytorestoration of HM contaminated soils, i.e. mycorrhizoremediation.     

3-（6-溴吡啶-2）-2-（2-氟-6-氯苯）-噻唑酮-4的电子结构与抗HIV活性问关系的量子化学研究

采用AMI方法,对3-(6-溴吡啶-2)-2-(2-氟-6-氯苯)-噻唑酮-4(BPFCIZO)进行了量子化学计算,给出了分子的几何构型、原子的净电荷、键级、前沿分子轨道组成与能级、前沿轨道电子密度等参数．结果表明BPFCIZO分子的稳定构型呈蝴蝶状,噻唑酮环为主活性区,其上的2位C、4位N和6位O等原子很可能是其与RT酶作用的活性位点．     

Pro/E与ANSYS、MasterCAM的数据转换方法研究

论述了三维设计软件Pro/E、通用有限元分析软件ANSYS、数控加工软件Master CAM各自的特点,提出在工程实践中联合应用的方法,通过离心压缩机叶轮实例,阐述了三者之间具体的数据交换方法和步骤,验证了其可行性。     

硅烯低聚体的电子结构性质

以硅烯为重要反应中间体的硅烯化学越来越引起人们的重视,本文选取含N杂环的硅烯稳定结构作为基本单元,探讨通过S i-O键合形成的低聚体的电子结构特性.采用Gaussian03程序包中的AM1方法,计算了几种模型的能级结构、电荷分布及激发态性质,并对计算结果从微观机理上进行了分析.     

Pornography,Alcohol, and Male Sexual Dominance

This study surveyed German heterosexual men's interest and engagement in a variety of dominant behaviors observed in recent analyses of pornography. Interest in watching popular pornographic movies or more frequent consumption of pornography was associated with men's desire to engage in or having already engaged in behaviors such as hair pulling, spanking a partner hard enough to leave a mark, facial ejaculation, confinement, double-penetration (i.e. penetrating a partner's anus or vagina simultaneously with another man), ass-to-mouth (i.e. anally penetrating a partner and then inserting the penis directly into her mouth), penile gagging, facial slapping, choking, and name-calling (e.g. “slut” or “whore”). Consistent with past experimental research on the effect of alcohol and pornography exposure on men's likelihood of sexual coercion, men who had engaged in the most dominant behaviors were those who frequently consumed pornography and regularly consumed alcohol before or during sex.     

Population structure and linkage disequilibrium in elite barley breeding germplasm from the United States

Cultivated barley is known to have a complex population structure and extensive linkage disequilibrium (LD). To conduct robust association mapping (AM) studies of economically important traits in US barley breeding germplasm, population structure and LD decay were examined in a complete panel of US barley breeding germplasm (3 840 lines) genotyped with 3 072 single nucleotide polymorphisms (SNPs). Nine subpopulations (sp1‒sp9) were identified by the program STRUCTURE and subsequently confirmed by principle component analysis (PCA). Out of the nine subpopulations, seven were very similar to the respective subpopulations identified by Hamblin et al. (2010) which were based on half of the germplasm and half of the SNP markers, but two subpopulations were found to be new. One subpopulation was dominated by six-rowed spring lines from Utah State University (UT) and the other was composed of six-rowed spring lines from multiple breeding programs (USDA-ARS Aberdeen (AB), Busch Agricultural Resources Inc. (BA), UT, and Washington State University (WA)). LD was found to decay across a range from 4.0 to 19.8 cM. This result indicates that the germplasm genotyped with 3 072 SNPs would be robust for mapping and possibly identifying the causal polymorphisms contributing to disease resistance and perhaps other traits.     

基于CATA技术的镁合金AM60半固态成形性研究

根据传热学原理和计算机辅助热分析(CATA)技术为理论基础,通过试验方法研究了镁合金AM60半固态成形性,研究结果表明,AM60合金固相率对温度的变化极为敏感,当初始固相分数从20%过渡到30%,温度从618.0℃降至615.4℃,仅仅约降低了2.6℃。在此区间内,固相率对温度的平均变化为3.85%/℃,初始固相率波动幅度为12.8%-19.2%/℃;当初始固相分数从30%过渡到40%,温度从615.4℃降至612.2℃,也仅有3.2℃左右,在此区间内,固相率对温度的平均变化为3.125%/℃,初始固相率波动幅度为7.8%-10.4%/℃;当温度在577.9-589.9℃区间内(跨度约为12℃),由于AM60镁合金固相分数则始终维持在62%上下。因此,AM60镁合金半固态成形工艺中,其初始固相率不应选择通常的20%-40%的区间范围内,而应该选择较大值,最佳值为62%左右。