为职业健康监管铸造利剑——记近年来我国防尘防毒标准制定工作

<正>近年来,各地发生的一些职业危害群体性事件引起社会广泛关注,如安徽省凤阳县石英砂生产造成的民工尘肺病事件和深圳民工尘肺事件等。就在人们关注职业危害事件和职业危害因素的同时,3年来,国家安监总局职     

岗位小天地 事业大舞台——记中国石化集团安庆石化化工作业部丙烯腈四班班长龚荣庭

<正>龚荣庭,安庆石化化工作业部(以下简称化工作业部)的一名共产党员,丙烯腈装置的一名班长。提到他,在化工作业部没有谁不竖大拇指。工作21年来,他以对技术不懈的追求,班组管理取得的突出成绩,赢得了领导的肯定和职工的钦佩,成为安庆石化职工学习的楷模、班组管理的一面旗帜。     

Long-term exposure to aryl hydrocarbon receptor agonist neburon induces reproductive toxicity in male zebrafish(Danio rerio)

Neburon is a phenylurea herbicide that is widely used worldwide, but its toxicity is poorly studied. In our previous study, we found that neburon has strong aryl hydrocarbon receptor(AhR) agonist activity, but whether it causes reproductive toxicity is not clear. In the present study, zebrafish were conducted as a model organism to evaluate whether environmental concentrations of neburon(0.1, 1 and 10 μg/L) induce reproductive disorder in males. After exposure to neburon for 150 days from embryo...     

希望今后的展示交易会办得更好--各方人士谈全国劳动防护装备展示交易会

2004年3月24日至26日，全国劳动防护装备展示交易会在上海市东亚展览馆举行．来自全国各地和境外的近180家生产厂家和经销商参加了展会。展会结束后．记者还陆续接到了有关厂家和经销商的电话．对今后如何举办展会提出建议和看法。虽然展示交易会己经过去了一段时间．但回顾一下各方对这次交易会的看法．依然是十分有意义的。     

城市防灾应急信息数据管理研究

以防灾应急信息系统的数据管理研究为背景,重点研究城市防灾应急工作中所涉及的城市信息、灾害信息以及防灾应急信息的数据管理。调查分析国内外防灾应急数据管理的现状,在此基础上综合考虑数据库应包含的数据类型及内容,从数据应用的角度出发,思考数据管理的规范流程,并提出数据管理过程中应注意的重要事项和适用的建议。针对城市防灾应急工作中存在的问题,提出综合管理城市建设及防灾减灾中相关的各类信息和数据的建议,阐述数据集成管理的重要性与优势,旨在解决防灾应急工作中复杂的数据管理问题,希望能够为城市防灾应急工作启发新思想和新方法。     

对我国静脉产业园区的思考——以洛阳市静脉产业园为例

随着我国产业升级,国家对绿色、生态、低碳目标的要求,各地的静脉产业园发展较快,这是解决人们在生产生活中产生各种废弃物合理处置的有效方法。但是,静脉产业园区在建设、运行期间,存在规划、协调、引导以及完善产业链等问题,针对这些问题提出了思考和建议。     

“5结合”做好煤矿安全生产标准化

<正>就煤矿企业而言,安全生产标准化工作是一项长期的、复杂的系统工程。很多矿井地质条件复杂,存在井下坡多、坡陡、弯多,线长、自然灾害多等现象,加之煤矿企业特有的用工性质决定了做好安全生产标准化工作的艰巨性、复杂性。一个煤矿安全生产标准化工     

Responses of bacterial strains isolated from drinking water environments to N-acyl-L-homoserine lactones and their analogs during biofilm formation

Often as a result ofbiofilm formation, drinking water distribution systems （DWDS） are regularly faced with the problem of microbial contamination. Quorum sensing （QS） systems play a marked role in the regulation of microbial biofilm formation; thus, inhibition of QS systems may provide a promising approach to biofilm formation control in DWDS. In the present study, 22 bacterial strains were isolated from drinking water-related environments. The following properties of the strains were investigated： bacterial biofilm formation capacity, QS signal molecule N-acyl-L-homoserine lactones （AHLs） production ability, and responses to AHLs and AHL analogs, 3-chloro-4-（dichloromethyl）-5-hydroxy-2（5H）- furanone （MX） and 2（5H）-furanone. Four AHLs were added to developed biofilms at dosages ranging from 0.1 nmol.L J to 100nmol.L1. As a result, the biofilm growth of more than 1/4 of the isolates, which included AHL producers and non-producers, were significantly promoted. Further, the biofilm biomasses were closely associated with respective AHLs concentrations. These results provided evidence to support the idea that AHLs play a definitive role in biofilm formation in many of the studied bacteria. Meanwhile, two AHLs analogs demon- strated unexpectedly minimal negative effects on biofilm formation. This suggested that, in order to find an applicable QS inhibition approach for biofilm control in DWDS, the testing and analysis of more analogs is needed.     

Single particle analysis of ambient aerosols in Shanghai during the World Exposition, 2010: two case studies

ATSI Model 3800 aerosol time-of-flight mass spectrometer (ATOFMS) was deployed for single-particle analysis in Shanghai during the World Exposition (EXPO), 2010. Measurements on two extreme cases: polluted day (1st May) and clean day (25th September) were compared to show how meteorological conditions affected the concentration and composition of ambient aerosols. Mass spectra of 90496 and 50407 particles were analyzed respectively during the two sampling periods. The ART-2a neural network algorithm was applied to sort the collected particles. Seven major classes of particles were obtained: dust, sea salt, industrial, biomass burning, organic carbon (OC), elementary carbon (EC), and NH₄-rich particles. Number concentration of ambient aerosols showed a strong anti-correlation with the boundary layer height variation. The external mixing states of aerosols were quite different during two sampling periods because of different air parcel trajectories. Number fraction of biomass burning particles (43.3%) during polluted episode was much higher than that (21.6%) of clean time. Air parcels from the East China Sea on clean day diluted local pollutant concentration and increased the portion of sea salt particle dramatically (13.3%). The large contribution of biomass burning particles in both cases might be an indication of a constant regional background of biomass burning emission. Mass spectrum analysis showed that chemical compositions and internal mixing states of almost all the particle types were more complicate during polluted episode compared with those observed in clean time. Strong nitrate signals in the mass spectra suggested that most of the particles collected on polluted day had gone through some aging processes before reaching the sampling site.