鼎湖山臭氧、氮氧化物和太阳可见光辐射相互关系的研究

给出了１９９６年了在广东肇庆鼎湖山自然保护区对太阳可见光 段辐射，地面臭氧、ＮＯ、ＮＯ２浓度的观测结果，对影响地面臭氧、ＮＯ、ＮＯ２的主要因子进行了分析，并得到了较好的结果，晴天条件下，地面臭氧浓度、ＮＯ、ＮＯ２浓度有明显的日变化；阴天条件下，地面臭氧浓度、ＮＯ、ＮＯ２浓度的日变化要复杂一些。     

耐盐降解苯乙酸类菌株A1(Arthrobacter sp.A1)的分离和特性研究

从处理含盐（NaCl浓度为0．77mol/L）苯乙酸生产污水的耐盐活性污泥中分离到一株节杆菌（Arthrobacter sp.A1）。该菌株能在NaCl浓度为0．1mol/L－2．0mol/L，以苯乙酸为唯一碳源的基础培养基中生长，或在NaCl浓度为0mol/L－2.4mol/L的完全培养基中生长，并能适应急剧的盐浓度变化，对其它常见的低价态无机盐份如KCl、MgCl2、（NH4）2SO4、Na2SO4、CaCl2也具有较强的耐受性，而对高价态无机盐份和重金属盐则耐受性不强。在不同的NaCl浓度下，菌株A1细胞内的QAC（季胺化合物）、游离氨基酸和K^ 含量与盐浓度的升高成正比关系。     

采用正交实验优化湿热法处理厨余垃圾的工艺条件

实验采用3因素3水平的正交实验设计方法,研究了湿热法处理厨余垃圾并使其饲料化的加工工艺中,时间、温度、加水量对厨余垃圾饲用价值的影响,选取粗蛋白、粗脂肪、粗纤维、粗灰分、钙和盐分为评价指标,确定反应的最佳工艺条件.实验结果表明,反应的最佳工艺条件为温度100℃、加水量50%、反应时间30 min.     

六氯苯的O3及UV/O3高级氧化降解试验研究

采用O₃、UV/O₃高级氧化法对水中六氯苯（HCB）的降解效果及机理进行了研究，并对结果进行了比较，结果表明，UV本身对HCB的去除率贡献不大，HCB可被O₃、UV/O₃快速降解，即UV＜O₃＜UV/O₃；O₃、UV/O₃作用时，提高体系的初始pH值不利于HCB的降解，在pH＝3，HCB=0.2 mg/L，反应40 min时，HCB的去除可达50%左右，酸性条件下有利于降解反应的进行；无论是O₃单独作用还是UV/O₃联合作用，HCB的降解基本上满足准一级反应动力学规律，如果体系的pH值基本保持恒定，这种规律就更为明显。根据离子色谱(IC)、GC对六氯苯降解中间产物进行了测定，探讨了O₃、UV/O₃降解六氯苯的途径和机理。     

非均相Fenton反应技术研究进展

Fenton氧化法是较为常用的一种高级氧化技术。非均相Fenton反应适用的pH值范围较宽，能避免均相Fenton反应产生铁泥沉淀的缺点，成为近年来Fenton反应的重要研究方向。本文对非均相Fenton氧化技术的研究现状及发展动态进行较为详尽的评述。     

光(温)敏核不育水稻生态及生理生化研究概述

本文介绍了光、温敏核不育水稻在生态及生理生化方面取得的主要成就.着重概述了光、温敏核不育水稻雄性育性转换的光温生态条件,育性转换过程中蛋白质、氨基酸、酶活性、ATP及内源植物激素持续变化.另外,对光、温敏不育水稻研究存在的问题进行了分析.     

甲醛光催化降解与过氧化氢生成的相关性研究

分别采用两种光催化剂(TiO2与Pd/TiO2)和三种紫外光源(黑光灯、杀菌灯、臭氧灯)分解水溶液中的甲醛,同时以酶法测定光催化降解过程中生成的低浓度过氧化氢.发现波长较短的紫外光源生成过氧化氢的浓度较高.当以臭氧灯为光源时,无论是否有催化剂存在,生成的过氧化氢浓度都在50mmol·m-3以上,因为185nm以下的紫外光可以直接由水与溶解氧生成臭氧,而后生成过氧化氢.不管有无催化剂存在,在臭氧灯作用下,甲醛溶液中生成的过氧化氢浓度高于纯水中生成的过氧化氢浓度.但是,在以黑光灯或臭氧灯为光源时,上述结果正好相反.此外,对于每种光源而言,当采用Pd/TiO2代替TiO2时,甲醛的分解和过氧化氢的生成都得到加强.甲醛光催化分解速率与相同条件下纯水中过氧化氢的生成速率呈正比,表明光催化降解的活性与光催化生成过氧化氢的能力近似呈正相关.     

Effects of intracolony variability in behavioral development on plasticity of division of labor in honey bee colonies

There is a genetic component to plasticity in age polyethism in honey bee colonies, such that workers of some genotypes become precocious foragers more readily than do workers of other genotypes, in colonies lacking older bees. Using colonies composed of workers from two identifiable genotype groups, we determined that intracolony differences in the likelihood of becoming a precocious forager are a consequence of differences in rates of behavioral development that are also evident under conditions leading to normal development. An alternative hypothesis, that differences in the likelihood of becoming a precocious forager are due to differences in general sensitivity to altered colony conditions, was not supported. In three out of three trials, workers from the genotype group that was more likely to exhibit precocious foraging in single cohort colonies also foraged at relatively younger ages in colonies in which workers exhibited normal behavioral development. In contrast, in three out of three trials, workers from the genotype group that was more likely to exhibit precocious foraging in single-cohort colonies did not show disproportionately more overaged nursing in colonies in which workers exhibited delayed development. These results indicate that genotypic differences in plasticity in age-related division of labor are based on genotypic differences in rates of behavioral development.     

微电解工艺处理染料工业废水研究

该文研究了采用微电解工艺处理染料工业废水.经过微电解工艺处理的染料工业废水色度和化学需氧量(COD)去除率分别为93.94%和64.62%.废水的可生化性提高,生化速率常数K从0.02876提高到0.04754.微电解工艺预处理该染料工业废水的吨水运行成本为0.91元.     

Study on the action and mechanism of humic acids in Kaschin-Beck disease

Humic acids, especially FA in fractions, contain more oxygen functional groups. In this experiment, on the basis of confirming the action of humic acids on KBD, what was studied is the biological effects of one of main oxygen functional groups, hydroxy group (-OH). The results indicate that inducing pathologic process of KBD, obviously decrease the GSH-Px activity and induce peroxidation membrane injury of tissue. The SOD activity increase in the tissues caused by oxygen functional groups showed that enhancing of free radical reaction should not be neglected.