DNA-benzoquinone adducts analyzed by nuclease P1 m ediated 32P-postlabeling method

With the super high sensitivity，high reproducibility and accumcy，nuclease P1 mediated ³²P-postlabeling version has been successfully used to analyze the DNA-benzoquinone(DNA-BQ)adducts formed from m vitro cultured cells，reaction of benzoquinone ith calf thymus DNA and nucleoside monophosphates．It has been proven that the maior radioactive spot，contributing more than 70% of the total radioactivity of DNA-BQ adducts detected，is from deoxycytidine(dC)modified by benzoqumone while a minor one from deoxyguanosme(dGl．The method is capable of detecting 1 adduct in 10⁹ to 10¹⁰ DNA bases．     

Identification of 1-hydroxypyrene in urine of dogs after pyrene injection and its excretion

With high performance liquid chromatograph and fluorospectrometry, 1-hydroxypyrene is identified as a metabolite of pyrene in the urine of dogs after intramuscular injection of pyrene. When three successive doses of 1,2 and 5 μmol/kg wt. pyrene administered, urinary excretion of 1-hydroxypyrene reaches the peak level between 24th and 48th hours. Excreted 1-hydroxypyrene consists of only about 0.05% of injected pyrene.     

应用~(32)P-后标记技术对苯醌和氢醌处理人血淋巴细胞形成DNA加合物的研究

应用核酸酶Ｐ１促进的３２Ｐ－后标记技术对苯醌和氢醌处理人血淋巴细胞后形成的ＤＮＡ加合物进行了研究。结果表明，人血淋巴细胞被苯醌和氢醌处理２４ｈ之后，均形成了同一种ＤＮＡ加合物。两种化合物在不同浓度下处理人血淋巴细胞每１０７核苷酸中有０．０１～１０个核苷酸形成加合物。为了达到同等ＤＮＡ加合物水平，氢醌比苯醌需要更高的浓度。小牛胸腺ＤＮＡ与苯醌、氢醌反应可生成５种ＤＮＡ加合物。用苯醌或氢醌处理淋巴细胞所形成的加合物种类与上述纯ＤＮＡ与苯醌，氢醌形成的５种加合物在双向薄层层折图谱上完全不相符合。这些结果意味着苯醌、氢醌与ＤＮＡ的加合作用在细胞内存在着修饰机制。     

Study on the residue of 1-(2-chlorobenzoyl)-3-(4-clflorophenyl)urea in Chinese cabbage and soil in the Southern China and its distribution in laboratorial microcosm

This paper discusses the residue of 1-(2-chlorobenzoyl)-3-(4-chlorophenyl) urea (ccu)in Chinese cabbage and soil in the Southern China．Under single factor controlled condition，the distribution and tramsformation ofCCU in microcosm are described． In field trial oftwo consecutive years，the results show that the haif-life values ofCCU in Chinese cabbage and soil in the Southern China are 3.8-4.1 days and 10.9—11.6 days；respectively．The experimental results in laboratorial microcosm demonstrate the fortnight haft-life of CCU in soil．Vegetables lack of enough ability to absorb CCU from soil and accumulate on roots．Although there are a certain amount residues ofCCU in soil，it is impossible to bring about serious pollution after routine application is carried out．     

科研单位的图书馆(室)的特点及管理人员素质培养

通过对科研单位图书（室）特点以及这些特点对图书管理人员素质要求的分析,提出了管理人员素质培养的方法。     

ISCL（S）T软件功能分析及其在环境规划中的运用

中英合作ＣＯＺＥＥ项目选择泉州市为试点开展综合环境管理计划，在大气环境规划的制定中，首次采用英国咨询专家推荐的ＩＳＣＬ（Ｓ）Ｔ软件，并取得了良好的计算效果，合理地制定出泉州市规划区大气污染物分配、控制方案。该文分析了ＩＳＣＬ（Ｓ）Ｔ软件的功能特点，并通过实例分析、验证ＩＳＣＬ（Ｓ）的先进性、实用性，探讨其在环境规划中的运用方法。这对ＩＳＣＬ（Ｓ）Ｔ软件在我国环境科学研究中的推广运用具有良好的借鉴作     

水中微量1-庚烯的负载型TiO2光催化降解及其影响因素

对水中微量1-庚烯的负载型TiO2光催化氧化反应的研究表明，在初始浓度为5.26-8.96mg/L时，反应速率常数基本保持不变，表明该反应服从一级反应动力学规律，当溶液pH分别为5.2和8.9时，1-庚烯的光催化氧化反应的速率常数和半衰期与pH=7.0时相近，表明在弱酸和弱碱溶液中,pH对1-庚烯光催化氧化反应的影响不大。溶液中无机阴离子如SO4^2-的存在，能抑制1-庚烯的光催化氧化反应。     

SO2排放量的GTRM（1）预测模型

基于GIM(1)模型,运用灰色系统理论的原理与方法,研究并提出了带时间限制因子的GTRM(1)模型。本文主要研究了GTRM(1)模型的建模结构、参数估计形式以及其解的表达形式,从而形成了完整的GTRM(1)模型。研究结果表明,GTRM(1)模型具有比GIM(1)、GM(1,1)模型更好的系统近似等价性,为非线性灰色环境系统提供了一条新途径。     

氯化三丁基锡对鲤鱼的急性毒性

氯化三丁基锡（ＴＢＴＣＩ）是一种对鲤鱼（Ｃｙｐｒｎｕｓｃａｒｐｉｏ）有剧毒的机锡化合物，急性毒性实验表明：ＴＢＴＣＩ对鲤鱼的９６ｈｒＬｃ５０为３．１５ｐｐｂ；４８ｈｒＬｃ５０为４．１３ＰＰｂ