Response of microcystis to copper stress: do phenotypes of microcystis make a difference in stress tolerance?

To elucidate the role of phenotype in stress-tolerant bloom-forming cyanobacterium Microcystis, two phenotypes of M. aeruginosa - unicellular and colonial strains were selected to investigate how they responded to copper stress. Flow cytometry (FCM) examination indicated that the percents of viable cells in unicellular and colonial Microcystis were 1.92-2.83% and 72.3-97.51%, respectively, under 0.25 mgl(-1) copper sulfate treatment for 24h. Upon exposure to 0.25 mgl(-1) copper sulfate, the activities of antioxidative enzyme, such as superoxide dismutase (SOD) and catalase (CAT), were significantly increased in colonial Microcystis compared to unicellular Microcystis. Meanwhile, the values of the photosynthetic parameters (F(v)/F(m), ETR(max), and oxygen evolution rate) decreased more rapidly in unicellular Microcystis than in colonial Microcystis. The results indicate that colonial Microcystis has a higher endurance to copper than unicellular Microcystis. This suggests that the efficient treatment concentration of copper sulfate as algaecides will be dependent on the phenotypes of Microcystis.     

Numerical simulations of heat and moisture transport in thermal protective clothing under flash fire conditions.

A numerical model of heat and moisture transport in thermal protective clothing during exposure to a flash fire was introduced. The model was developed with the assumption that textiles are treated as porous media. The numerical model predictions were compared with experimental data from different fabric systems and configurations. Additionally, with the introduction of a skin model, the parameters that affect the performance of thermal protective clothing were investigated.     

火灾事故发展趋势预测方法的应用研究

介绍了三种火灾事故发展趋势预测方法：灰色理论预测法、指数平滑法和马尔科夫预测法。结合贵州省1997至2006年火灾四项指标统计数据,探讨了三种预测方法对不同波动幅度数据序列的适用性;给出了贵州省未来两年火灾的发展趋势,可为当地制定正确地防止火灾发生的决策提供重要的参考依据。此外,还对每种方法在预测过程中值得注意的问题进行了讨论。     

基于OSHMS的煤矿模糊综合安全评价管理模型的建立

针对目前我国煤矿企业安全管理现状,以一种全新的思路结合职业安全健康管理体系(OSHMS)的系统化体系结构及其先进之处,以预防为主,持续改进为动力,建立了基于生产过程的绩效测量、人员职责分配、运行控制和风险管理为核心的4个主要因素的安全评价管理模型;并以此为指导建立安全评价指标体系框架,运用模糊综合安全评价的方法对指标体系进行合成;最后,结合矿井生产过程中的供电系统,对淮南潘三矿现场进行实例应用,证明其可行性。该管理模型对煤矿企业安全管理有推广和借鉴意义,可望为煤矿企业通过安全管理实现科技兴安提供一种更可靠,更有效的安全管理方法。     

劳动防护服号型设置的研究

本文对劳动防护服的号型设置进行了分析与研究。《劳动防护服号型》是各类劳动防护服制作中广泛使用的基础性国家标准,依据当前劳动者人体尺寸的统计分析和企业劳动防护服生产供应实际情况,科学合理设置服装号型,以符合国家标准的科学性、实用性以及增强劳动防护服的舒适性功能。     

农村生活污水治理措施

介绍了适合于国内农村生活污水治理的一些技术与措施。沼气技术是当前处理农村生活污水的较佳选择。     

有毒气体危害区域划分之临界浓度标准研究

通过研究毒物伤害准则进而界定有毒气体危害浓度,对有毒气体泄漏扩散后的危害区域进行分级划分,以采取相应的防护措施,最大限度的即时有效的减轻有毒气体对人员的伤害.最后,以氯为例,对比其在不同伤害准则下危害区域划分临界浓度标准值,数值差别较大,因此在使用时应根据实际情况加以判断,选择最适当的标准来划分危害区域.     

阳离子表面活性剂十六烷基三甲基溴化铵对酞酸酯类化合物增溶性研究

用阳离子表面活性剂十六烷基三甲基溴化铵对六种酞酸酯类化合物(五种脂肪链酞酸酯和一种苯基酞酸酯)进行了增溶性实验．结果表明,在表观浓度(Ｃｓ)小于临界胶速浓度(ＣＭＣ)时,十六烷基三甲基溴化铵对四种酞酸酯(ＤＭＰ和ＤＰｈＰ除外)有一定程度的增溶作用;当Ｃｓ大于ＣＭＣ时,对六种化合物的增溶性显著增强．其增溶性(Ｓｔ/Ｓｗ)随Ｃｓ增大而线性递增:当Ｃｓ＜ＣＭＣ时,Ｓｔ/Ｓｗ＝ａ＋Ｋｍｎ·Ｃｓ,ｒ＞０．９０,ｎ＝５;当Ｃｓ＞ＣＭＣ时,Ｓｔ/Ｓｗ＝ａ＋Ｋｍｃ·Ｃｓ,ｒ＞０．９９,ｎ＝５． 各化合物增溶系数随各自固有水溶性(Ｓｗ)减小而增大(苯基酞酸酯有所反常),ｌｇＫｍｎ和ｌｇＫｍｃ与各自ｌｇｌ/Ｓｗ具有良好的线性正相关性．本文进一步对增溶机理进行了分析解释．