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Abstract: Quantitative genetic variation in larval tolerance to cyhalothrin and fenvalerate was examined in a pyrethroid-resistant population of cotton bollworm, Helicoverpa armigera (Hübner) was examined with half-sibling analysis and significant ad
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文摘:通过单对交配设计不同的交配家系,采用半同胞法分析了棉铃虫对三氟氯氰菊酯和氰戊菊酯的抗性狭义遗传力,并对2种菊酯类药剂的抗性发展速度进行评价。 |
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Abstract: Quantum chemistry can solve problems which are not settled with conventional theory and method.The fundamental theory of quantum chemistry and SCC-DV-Xα method are introduced.The advances of quantum chemistry in cement chemistry field in recent
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文摘:量子化学能解决许多用传统理论和方法所不能解决的材料科学问题，本文介绍了计算量子化学的基本理论及SCC-DV-Xα方法，综述了近三年来量子化学在水泥化学领域应用的研究进展。 |
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Abstract: Recent advances in asymmetric hydrosilylation of prochiral carbonyl compounds catalyzed by chiral transition metal complexes are reviewed in this paper with 47 references.
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文摘:评述了近年来手性金属配合物催化的前手性羰基化合物的不对称硅氢化反应研究进展。 |
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Abstract: Recent studies on ferroelectric thin films,multilayered films and heterostructures are reviewed.The advantages and disadvantages of different processing methods for ferroelectric thin films are discussed.Applications of the films,especially in f
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文摘:综述了铁电薄膜、多层膜和异质结构研究的新进展，分析了铁电薄膜不同制备方法的优缺点.重点介绍了铁电薄膜在铁电存储器、微电子机械系统及热释电红外探测器方面的应用.指出了目前铁电薄膜及器件设计研究需要重点解决的一些问题. |
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Abstract: Recent studies reveal that wine is rich in phytoalexin and polyphenolic compounds, which can inhibit atherosclerosis by modulating metabolism of plasma lipid and lipoprotein, preventing platelet from aggregation and relaxing cardiovascular smoot
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文摘:近年来的一些研究表明，葡萄酒含有植物防御素、多酚类物质等多种成分，有调节血脂和脂蛋白代谢、抑制血小板凝聚、松驰血管等作用；可抑制动脉粥样硬化的形成，长期适量饮用可降低缺血性心脏病的发生率和死亡率。 |
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Abstract: Recrystallized in multiple solvent consisting of ethanol,low-carbon alcohol and water,antioxidant1010 was refined,and the main factors of affecting crystalliza tion including solvent,water et. al.were studied in the laboratory,and individua l de
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文摘:在乙醇、低级醇A和水三元混合溶剂中，通过对抗氧剂1010粗品的重结晶精制研究，制备得到了纯度高、堆密度大、流动性好、挥发份低、质量稳定、干燥速度快的δ－型抗氧剂1010。 |
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Abstract: Refer the development of rock salt mining, the Kunming Salt Mine determines changing process of the oil underlay to the connected well.
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文摘:随着岩盐开采技术的不断发展,昆明盐矿研究决定,将该矿油垫法采卤生产工艺井改为连通法生产工艺井。 |
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Abstract: Reformation of medium, mini-scale boiler by means of single-chip computer can both heighten boiler heat efficiency to save energy, and make vapour pressure stable to implement safe moving and automatical control.
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文摘:利用单片微机改造中小型工业锅炉，既能提高锅炉热效率，达到节能效果，又能使蒸汽压力稳定，运行安全可靠，实现控制自动化。 |
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Abstract: Regarding the practical problems in applications of photoelectric encoder and the solutions a detecting method for displacement with higher accuracy and the implementing circuit are stated and designed.With the control of underdrived robot arm a
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文摘:就光电编码器的实际应用问题及解决方法，提出并设计了一套适用于精度要求较高的位移检测方法及实现电路，文末以欠驱动机器臂的控制为例，介绍其具体应用。 |
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Abstract: Relationships between fluidity and carbon yields of the modified pitches, which were prepared by different methods and under different conditions, have been investigated.
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文摘:初步探讨了不同方法及工艺条件下所得改性沥青流动性与炭收率的相互关系。 |
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Abstract: Renews in this paper of the surfactant oil based for surface activies agent of anionic(alcohol Sulfate,α－sulfonata,acetyl Cyanamid,and Oleie methyl ester Sulfonat etc.)Surface a ctivies agent of nonionic(APG,alcohol polyxyethnyl ether,alkyl poly
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文摘:综述了油基表面活性剂中阴离子表面活性剂(醇硫酸盐，α-磺酸盐、酰基氰胺、油酸甲酯磺酸盐等)，非离子表面活性剂(APG、脂肪醇聚氧乙烯烷基醚、烷基聚氧乙烯烷基羟基醚等)的技术进展及今后发展趋势。 |
