Synthesis and structure-activity relationship of diene modified analogs of<Emphasis Type="Italic"> Matsucoccus</Emphasis> sex pheromones

The biological activity of the Matsucoccus spp. sex pheromones and diene modified analogs has been tested in forests of Israel and Portugal in order to explore the structure-activity relationship of the pine bast scale pheromone/kairomone system. The response of the adult predatory bugs, Elatophilus hebraicus and E. crassicornis and of the brown lacewing, Hemerobius stigma is more selective than that of the conspecific Matsucoccus males. The removal of the terminal methyl group from the diene terminus of both pheromones 1 and 2 eliminates all kairomonal activity but retains moderate pheromonal activity. Addition of a methyl group to the diene terminus of pheromones 1 and 2 sustains full pheromonal and kairomonal activities of the Elatophilus spp. but eliminates entirely the kairomonal activity of H. stigma. Subtle designed alterations in the structure of the diene group, typical of all Matsucoccus pheromones, change the mode of the kairomonal activity markedly.     

长江中下游火山-侵入杂岩研究中值得探讨的几个问题(一)

长江中下游燕山期中酸性-酸性火山-侵入杂岩大家公认为具有偏碱性到碱性特点，但对富碱原因即碱质来石源则存在不同意见，大多数人认为壳幔亮混源，碱质来源于富集地幔的部分熔融，也受到地壳物质的混染．另一种意见强调富碱是由于岩浆侵位或分异过程中受到蒸发岩（特别是膏盐层）的混染与同化。笔者根据长江中下游有关岩体的大量岩石化学分析数据．分地区、分岩体、也按时代对其K2O、Na2O、CaO、MgO与SiO2的相关性作了直观性对比分析，事实表现出Na2O对SiO2几乎完全没有相关性，Na2O对SiO2可以说是独立变化的；K2O与MgO对SiO2具有不同程度的相关性；而CaO－SiO2则具有明显的直线性相关。据此提出：除了原始岩浆具有的碱质外，在岩浆分导过程中不时地有外来碱质加入，这些外来的碱质主要由中、下三叠统中的膏盐层提供。文中根据岩浆硫的δ34S值偏高、膏盐层主要矿物的自由能在高温下熔融及分解温度与低温下在水中的溶解度、石膏矿山的矿泉水中K＋、Na＋、C1＋、SO32-等的浓度，以及斜长石的环带构造方面作了论证．     

A regional environmental management information system for Chinese EPA—the system analysis and design

REMIS is one of key research projects sponsored by the central government. It is recommended to regional EPAs as a main tool of the environmental management. REMIS simulates the functions of the regional EPAs and aimed to improve their management level. The national environmental management information system will base on REMIS.Functional analysis is the kernel of the REMIS system analysis. Data and data flow analysis are used to support the functional analysis.Investigations on the functions of the local EPAs of eight provinces and 12 cities have been taken. The functions were carefully sorted. Modular design method was used in system analysis and system design.The system analysis included functional analysis, data analysis and data flow analysis. The system design is based on the system analysis. HIPO diagram of each modular, data base structure, menu design, selection of hardware and software environment were the main items of the system design.     

Experimentally proved biosynthesis of vitamin C in a guinea pig

The Science of Nature -     

生物质气化洗焦废水的预处理和微生物降解

为了对生物质气化洗焦废水进行深度处理,达到废水排放标准,采用物理过滤和微生物降解相结合的方法,对洗焦废水的原液进行处理。实验结果表明,用木屑、颗粒活性碳、微生物降解的连续步骤处理生物质气化洗焦废水,可达到理想的生物质气化洗焦废水COD的去除效果。     

矩形隔声罩声衰减的预测

本文用统计能量分析的方法对一个放在扩散声场内的矩形隔声罩的声衰减进行了预测,计算了隔声罩声衰减随壁厚改变的变化,并讨论了罩内声吸收对声衰减的影响。     

准确测定高锰酸盐指数考核样的方法

根据长期的实际操作经验，要准确测定高锰酸盐指数值，在样品分析中，水浴时间不能少于35min；K值在0．980-1．010；滴定时温度保持在70℃。以提高测定结果的准确度。     

华南玄武岩红土化过程中微量元素地球化学

广东、海南的玄武岩．在强烈的红土化过程中．元素在红土剖面中发生迁移和残留、贫化和富集。根据红土化过程中元素的地球化学性状，将元素划分为活泼元素和不活泼元素两大类。并首次采用了元素它集因子这个概念来探讨红土化过程中微量元素的地球化学行为。最后讨论了红土化过程小金的表生富集作用。     

推导保护水生环境质量标准的方法研究

综述了美国及欧洲一些国家推导水生环境质量标准的方法研究。对水生环境质量标准包括的水质标准，底泥标准，人类和野生生物标准进行了分别叙述，详细讨论了推导水生环境质量标准的数据要求和计算方法。     

Limb reduction and chorion villus sampling

Upper limb reduction was diagnosed by ultrasound scan at 17 weeks after chorion villus sampling at 9 weeks' gestation. Pregnancy was terminated and necropsy confirmed limb reduction in an otherwise normal fetus. The relationship of limb reduction to amniotic band syndrome is discussed.