对我矿职工安全生产心理素质的分析

心理是人们感觉、知觉、记忆、思维、情感、意志和气质、能力、性格等心理现象的总称,包括认识过程、情感过程、意志过程。心理状态的好坏直接支配着操作者动作的正确与否,操作者心理状态好。则反应速度快,判断准确率高,反之,则表现为反应迟钝,产生误动作等。     

聚氯乙烯塑料管道生产通风防尘措施的优化设计研究

聚氯乙烯（ＰＶＣ）产品生产过程中产生的ＰＶＣ粉尘，工人长期接触可导致肺部纤维化病变。我们选择某ＰＶＣ塑料管道生产厂粉尘危害严重的配料和振动筛料工序，优化设计研究应用了“高效旋风除尘器”通风防尘系统，使工人作业环境空气中粉尘浓度低于最高容许浓度（ＭＡＣ），排放口粉尘浓度低于环保标准，有效地控制了粉尘危害。     

The effects of acidic irrigation on soil microorganisms at Kevo, Northern Finland

Effects of simulated acid rain (a mixture of H(2)SO(4) and HNO(3); pH(3)) on soil microbiology were studied in a field experiment in northern Finland. Irrigated control plots received the same amount of spring water (pH 6) as the acid treated plots. Fungal lengths and total bacterial numbers were studied after the treatments had continued for three growing seasons. The numbers of bacteria in five physiological groups (those utilizing starch, protein, pectin, xylan, or cellulose) were measured by MPN (most probable number) techniques. The lengths of total and FDA active fungal hyphae were not significantly different between the acid treated and the control plots. The counts of total bacteria were not significantly different between treatments, but the MPNs of all five physiological groups of bacteria were approximately 60% lower in the acid treated plots than in the controls.     

感触出警——女交警的故事

一次周末的星期六,阳光明媚,空气清新,是一个难得的周末,只可惜要值两天备勤班,又失去一次外出踏青的机会,心里有一丝遗憾。刚起床洗漱,传呼机就急促地响起来,值班员通知:万全路段一辆桑塔纳轿车冲出路外撞到行道树,马上出警。就这样,连早饭都没吃就与陈教导员赶赴50多公里外的现场。倒在路沟的轿车损坏严重,当方面事故处理起来比较容易,很快勘察完现场,我们即调头回队,在路上草草吃了早饭连带午饭,回到队里已经是12点多。     

近5年旅游研究发展趋势探讨——基于对国家自然、社会科学基金旅游类项目的分析

基于2008-2012年获批的国家自科基金与社科基金旅游类项目,从学科分类、时空分布、研究问题等角度进行统计分析,以期揭示我国近5年旅游研究进展及发展趋势.研究发现,旅游开发、旅游影响、旅游可持续发展研究为两类项目研究重点.     

Degradation of macrolide antibiotics by ozone: a mechanistic case study with clarithromycin

Macrolide antibiotics are widely used (in the order of 1g per person per year). They pass the body largely unchanged and are also not degraded in wastewater treatment plants. With not too much effort, they may be eliminated from their effluents by ozonation. The macrolide antibiotics have all a dimethylamino group at one of the carbohydrate residues in common. This functional group is the target of the ozone reaction, and clarithromycin has been selected here for a more detailed study. Since only the free amine reacts with ozone, the rate of reaction is pH dependent (at pH 7: k = 4 x 10(4) M(-1) s(-1)). In analogy to the ozonolysis of trimethylamine, the main reaction is a transfer of an O-atom yielding the N-oxide (identified by HPLC/MS-MS). A minor product (10%, based on formaldehyde yields) is demethylated clarithromycin (identified by HPLC/MS-MS). The dimethylamino group is thought to be essential for the binding of the macrolide antibiotics to their target. As a consequence, chemical changes of this functional group, notably the formation of the N-oxide that is no longer a proton acceptor, inactivates these drugs as assayed by the suppression of the growth of Pseudomonas putida. This is most important for wastewater treatment, as mineralization of clarithromycin by ozone would require 100 times as much ozone.     

Influence of substrate on bioaccumulation of 14C-paraquat in compost worms Eisenia foetida

Contamination of soil with pesticides can be evaluated using toxicity tests with worms because their ecological niche makes them good bioindicators. Bioaccumulation in compost worms of [methyl-14C] paraquat (1,1'-dimethyl-4,4'-bipyridinium dichloride) was measured after three-month exposure in two substrates with differing physicochemical characteristics, in particular their organic matter and clay contents. The treatments were 1.2, 12, and 120 microg paraquat g(-1) substrate. The action of the worms did not influence the loss of 14C from the substrates, as the 14C-recovered was essentially quantitative at the end of the study in both the presence and absence of the worms. The organic matter and clay contents of the substrates determined the extent of the paraquat uptake by the worms; worms from the substrate with smaller amounts of clay and organic matter had the higher values of the bioconcentration factor (BCF), these being about 5 (fresh-weight basis) and independent of the application rate. The BCF values in the substrate containing more organic matter and clay were smaller but increased from 1.1 to 3.8 with the increasing rates of application. However, in both substrates the amounts of paraquat bioaccumulated in the worms was always less than 1% of that applied, indicating the very strong binding of paraquat to the substrates and hence low availability to the worms.     

A behavior based safety approach at a Kuwait research institution

INTRODUCTION: Behavior based safety (BBS) initiatives are the current trend toward improving safety performance. METHOD: This study outlines the framework of the BBS process and summarizes several behavioral safety approaches to accident prevention. RESULTS: Although most of the published research has focused on the improvement of safe behavior in industry, this study is the first to apply the current approach of behavior based safety in a research/educational setting. An experiment conducted at a research institution demonstrated the effectiveness of a well-designed behavior based safety process. A follow-up study indicated that the BBS produced a lasting effect for the experimental group. IMPACT ON INDUSTRY: Results from this study can be the driving force to implement behavior-based safety processes into educational, research, and training organizations.     

10kV真空断路器的使用和维护

目前在10KV及以下电压等级配电网络中,真空断路器已逐步取代油断路器,在无油化改造过程发挥了积极作用.但在使用维护中应注意几个问题.