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变电运行电气误操作事故原因及防范措施 被引量:17
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作者 李道鹏 石卓 《安徽电气工程职业技术学院学报》 2010年第1期65-68,共4页
基于事故原因调查统计数据,结合现场的变电运行和管理实践,综合考虑变电站误操作事故的各种危险因素和激发条件,分别从人的因素和物的因素两个角度揭示了误操作事故的深层次原因及一般性规律,提出了消除危险性因素和降低事故发生率的措施。
关键词 变电运行 电气误操作 的因素 物的因素
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施工安全事故原因分析
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作者 项雪萍 《现代商贸工业》 2015年第2期170-171,共2页
从人、物、环境以及管理四个方面分析了引起施工安全事故的主要原因,建立了安全事故起因系统,为有效的改善施工安全、减少安全事故的发生提供依据。
关键词 施工安全事故 的因素 物的因素 环境因素 管理因素
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用设备管理四要素指导设备管理实践
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作者 纪建民 《中国设备管理》 1999年第6期12-13,共2页
本文应用生产系统“四要素”理论,总结发电设备管理工作的做法和经验,探讨理论和实践问题.
关键词 设备管理 的因素 管理 物的因素 环境因素
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浅谈煤矿如何做好安全防范
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作者 李东风 李标 赵雷刚 《商情》 2014年第45期392-392,共1页
煤矿通风安全是煤矿安全生产的关键,本文从人的因素、物的因素及环境因素几个方面系统地阐述了影响煤矿通风安全的因素及预防办法。
关键词 煤矿 的因素 物的因素 安全防范
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压缩机安装精度问题导致机组(机器)安装使用产生负面影响的研究
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作者 刘运达 王传铭 +2 位作者 董昌 杨晶 刘昌良 《中文科技期刊数据库(全文版)工程技术》 2021年第11期229-232,共4页
本工程涉及到三台MW-172/0.2-6型制冷压缩机的安装,除了要对本压缩机机体内部及机体主要联接件进行细致了解以外,还要对其与机体接触的任何组件也要认真研究和考量。一般压缩机安装到调试阶段,对于问题的产生和暴露发生,都要从起始开始... 本工程涉及到三台MW-172/0.2-6型制冷压缩机的安装,除了要对本压缩机机体内部及机体主要联接件进行细致了解以外,还要对其与机体接触的任何组件也要认真研究和考量。一般压缩机安装到调试阶段,对于问题的产生和暴露发生,都要从起始开始分析,追查根本,查清问题症结。所以,过程控制是检验工作的一把标尺。压缩机安装除了自身质量要有保证以外,还要对机体安装各环节要进行过程监控。常见的压缩机在调试阶段和使用阶段,频繁发生机械振幅不均、机器声响大,轴承温度高,间断跳车和达不到额定的转速要求等状况。在施工过程中,对于出现的这些问题,要查找到问题的关键因素,常用办法就是排除法,这样做起来,会花费相当大的精力,反复工作,给工期及自身工作带来无畏的麻烦。本工程就压缩机安装,重点分析施工过程中检验和纠偏人为因素和物的因素的综合研究,将问题消除在安装之前,将不可预见的质量问题降到最低限度。 展开更多
关键词 设备安装精度 人为因素 物的因素 纠偏处理
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Hydrogen sulfide attenuates gastric mucosal injury induced by restraint water-immersion stress via activation of KATPchannel and NF-κB dependent pathway 被引量:7
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作者 Hong-Zhao Sun Shan Zheng +4 位作者 Kai Lu Feng-Tian Hou Jie-Xue Bi Xue-Lian Liu Shan-Shan Wang 《World Journal of Gastroenterology》 SCIE CAS 2017年第1期87-92,共6页
AIMTo explore the effect of hydrogen sulfide (H<sub>2</sub>S) on restraint water-immersion stress (RWIS)-induced gastric lesions in rats and the influence of adenosine triphosphate (ATP)-sensitive potassiu... AIMTo explore the effect of hydrogen sulfide (H<sub>2</sub>S) on restraint water-immersion stress (RWIS)-induced gastric lesions in rats and the influence of adenosine triphosphate (ATP)-sensitive potassium (K<sub>ATP</sub>) channels and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-&#x003ba;B) pathway on such an effect.METHODSMale Wistar rats were randomly divided into a control group, a physiological saline (PS) group, a sodium hydrosulfide (NaHS) group, a glibenclamide (Gl) group, Gl plus NaHS group, a pyrrolidine dithiocarbamate (PDTC) group, and a PDTC plus NaHS group. Gastric mucosal injury was induced by RWIS for 3 h in rats, and gastric mucosal damage was analyzed after that. The PS, NaHS (100 &#x003bc;mol/kg body weight), Gl (100 &#x003bc;mol/kg body weight), Gl (100 &#x003bc;mol/kg or 150 &#x003bc;mol/kg body weight) plus NaHS (100 &#x003bc;mol/kg body weight), PDTC (100 &#x003bc;mol/kg body weight), and PDTC (100 &#x003bc;mol/kg body weight) plus NaHS (100 &#x003bc;mol/kg body weight) were respectively injected intravenously before RWIS.RESULTSRWIS induced serious gastric lesions in the rats in the PS pretreatment group. The pretreatment of NaHS (a H<sub>2</sub>S donor) significantly reduced the damage induced by RWIS. The gastric protective effect of the NaHS during RWIS was attenuated by PDTC, an NF-&#x003ba;B inhibitor, and also by glibenclamide, an ATP-sensitive potassium channel blocker, in a dose-dependent manner.CONCLUSIONThese results suggest that exogenous H<sub>2</sub>S plays a protective role against RWIS injury in rats, possibly through modulation of K<sub>ATP</sub> channel opening and the NF-&#x003ba;B dependent pathway. 展开更多
关键词 Hydrogen sulfide Nuclear factor kappa B Gastric mucosal injury Restraint water-immersion stress Adenosine triphosphate-sensitive potassium
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Seasonal Changes of Reproductive Activity and Biochemical Composition of Pen Shell Atrina pectinata Linnaeus,1767 in Bohai Sea,China 被引量:2
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作者 WANG Changbo LI Qi +1 位作者 XU Chengxun YU Ruihai 《Journal of Ocean University of China》 SCIE CAS CSCD 2017年第3期479-489,共11页
Seasonal variations in the biochemical composition and the reproductive cycle of pen shell Atrina pectinata in Bohai Sea were investigated from May 2013 to April 2014. Histological analysis indicated that the reproduc... Seasonal variations in the biochemical composition and the reproductive cycle of pen shell Atrina pectinata in Bohai Sea were investigated from May 2013 to April 2014. Histological analysis indicated that the reproductive cycle of A. pectinata can be divided into two phases, inactive stage and gametogenesis, which were equally and significantly influenced by seawater temperature and food availability. Gametogenesis began in late autumn(October), and completed in June and July. Spawning took place in August, coinciding with the highest water temperature and the richest phytoplankton. The significantly high glycogen content in adductor muscles sustained throughout the late active and ripeness stages, but plummeted during spawning and inactive stages. The protein content in female gonads exhibited a synchronous increase along with oocyte diameter and lipid content, suggesting that the female gonads could accumulate protein and lipid for vitelline in A. pectinata. Furthermore, the RNA/DNA ratio was found to be a useful index to indicate the level of gonad maturation in both males and females. The findings of the present study provided a foundation for the fishery resource administration and the aquaculture development of this species. 展开更多
关键词 biochemical composition reproductive cycle environment factor Atrina pectinata seasonal variation
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cytoplasmic domain of tissue factor promotes liver fibrosis in mice 被引量:3
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作者 Virginia Knight Dinushka Lourensz +3 位作者 Jorge Tchongue Jeanne Correia Peter Tipping William Sievert 《World Journal of Gastroenterology》 SCIE CAS 2017年第31期5692-5699,共8页
To evaluate the role of tissue factor (TF) and protease activated receptor (PAR)-2 in liver fibrosis. METHODSUsing CCl<sub>4</sub> administration for eight weeks, we induced hepatic fibrosis in wild-type C... To evaluate the role of tissue factor (TF) and protease activated receptor (PAR)-2 in liver fibrosis. METHODSUsing CCl<sub>4</sub> administration for eight weeks, we induced hepatic fibrosis in wild-type C57BL/6 mice and in mice with deletion of the cytoplasmic signalling domain of TF (TF<sup>§CT/§CT</sup>), deletion of PAR-2 (PAR-2<sup>-/-</sup>) and combined deletion of TF signalling domain and PAR-2 (TF<sup>§CT/§CT</sup>/PAR-2<sup>-/-</sup>). Hepatic fibrosis area was assessed by quantitative imaging of picrosirius red staining. Hepatic collagen content was assessed by hydroxyproline levels. Hepatic stellate cells (αSMA positive) and hepatic macrophages (CD68 positive) were identified by immunohistochemistry. Hepatic gene expression was determined by PCR and liver TGFβ1 content by ELISA. RESULTSCCl<sub>4</sub> treated mice with deletion of the PAR-2 gene (PAR-2<sup>-/-</sup>) and the cytoplasmic domain of TF (TF<sup>§CT/§CT</sup>) developed significantly less hepatic fibrosis, characterised by reduced liver fibrosis area and hydroxyproline content, compared to control wildtype mice treated with CCl<sub>4</sub>. The observed reduction in histological fibrosis was accompanied by a significant decrease in the hepatic content of TGFβ, the prototypic fibrogenic cytokine, as well as fewer activated hepatic stellate cells and hepatic macrophages. Deletion of the TF cytoplasmic signalling domain reduced hepatic fibrosis to levels similar to those observed in mice lacking PAR-2 signalling but combined deletion provided no added protection against fibrosis indicating a lack of mutual modulating effects that have been observed in other contexts such as angiogenic responses. CONCLUSIONTissue factor cytoplasmic domain is involved in TF-PAR-2 signalling initiating hepatic fibrosis and is a potential therapeutic target, as its deletion would not impact coagulation. 展开更多
关键词 Tissue factor Protease activated receptor Hepatic stellate cell Liver fibrosis MACROPHAGE
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Mollusks Resources in Western Coast of the Tonkin Gulf
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作者 Do Cong Thung Do Dinh Thinh Le Thi Thuy 《Journal of Earth Science and Engineering》 2013年第1期35-41,共7页
It has been classed 856 species of the mollusks which belong to 120 families and five classes living in western coast of the Tonkin Gulf. The class Gastropod was the most abundant, with 449 species, the Bivalve with 3... It has been classed 856 species of the mollusks which belong to 120 families and five classes living in western coast of the Tonkin Gulf. The class Gastropod was the most abundant, with 449 species, the Bivalve with 368 species, the Scaphopoda with 10 species, the Cephalopods with 19 species and the Amphineura with eight species. Standing stock was estimated about 366,749 tons, that annually caught 80,000 tons. The causes of the resource depletion were human and natural, but the human factors played a key role. The fundamental orientations for developing the resources include: exploiting during harvest seasons, planning suitable aquaculture, moderate exploitation so the resources can restore themselves, combining exploitation and conservation. 展开更多
关键词 MOLLUSK Tonkin Gulf standing stock resource suitable aquaculture conservation.
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Hepatotropic growth factors protect hepatocytes during inflammation by upregulation of antioxidative systems
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作者 Matthias Glanemann Daniel Knobeloch +4 位作者 Sabrina Ehnert Mihaela Culmes Claudine Seeliger Daniel Seehofer Andreas K Nussler 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第17期2199-2205,共7页
AIM:To investigate effects of hepatotropic growth factors on radical production in rat hepatocytes during sepsis.METHODS:Rat hepatocytes,isolated by collagenase perfusion,were incubated with a lipopolysaccharide(LPS)-... AIM:To investigate effects of hepatotropic growth factors on radical production in rat hepatocytes during sepsis.METHODS:Rat hepatocytes,isolated by collagenase perfusion,were incubated with a lipopolysaccharide(LPS)-containing cytokine mixture of interleukin-1β,tumor necrosis factor-α and interferon-γ to simulate sepsis and either co-incubated or pre-incubated with hepatotropic growth factors,e.g.hepatocyte growth factor,epidermal growth factor and/or transforming growth factor-α.Cells were analyzed for glutathione levels.Culture supernatants were assayed for produc-tion of reactive oxygen intermediates(ROIs) as well as NO2-,NO3-and S-nitrosothiols.To determine cellular damage,release of aspartate aminotransferase(AST) into the culture medium was analyzed.Activation of nuclear factor(NF)-κB was measured by electrophoretic mobility shift assay.RESULTS:Rat hepatocytes treated with the LPS-containing cytokine mixture showed a significant increase in ROI and nitrogen oxide intermediate formation.AST leakage was not significantly increased in cells treated with the LPS-containing cytokine mixture,independent of growth-factor co-stimulation.However,pretreatment with growth factors significantly reduced AST leakage and ROI formation while increasing cellular glutathione.Application of growth factors did not result in increased NF-κB activation.Pretreatment with growth factors further increased formation of NO2-,NO3-and S-nitrosothiols in hepatocytes stimulated with LPS-containing cytokine mixture.Thus,we propose that,together with an increase in glutathione increased NO2-,NO3-formation might shift their metabolism towards non-toxic products.CONCLUSION:Our data suggest that hepatotropic growth factors positively influence sepsis-induced hepatocellular injury by reducing cytotoxic ROI formation via induction of the cellular protective antioxidative systems. 展开更多
关键词 Primary human hepatocytes Hepatocyte proliferation CYTOKINES Hepatotropic growth factors Nitric oxide GLUTATHIONE
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非整体性教育理解现象论析
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作者 刘庆昌 《高等学校文科学术文摘》 2022年第5期75-76,共2页
一、非整体性教育理解现象背后的原因分析第一,轻视整合的教育理论论述习惯。我们的教育理论分析偏重于“这一事物的因素”的列举与说明,但对“将这些因素构成这一整个事物的交织的方式”则疏于阐明。这种现象即是我们所说的轻视整合的... 一、非整体性教育理解现象背后的原因分析第一,轻视整合的教育理论论述习惯。我们的教育理论分析偏重于“这一事物的因素”的列举与说明,但对“将这些因素构成这一整个事物的交织的方式”则疏于阐明。这种现象即是我们所说的轻视整合的教育理论论述习惯。应该说,我们的教育论述在科学分析之后未能充分进行思维上的组织综合,即便存在着形式上的组织综合,也多是形式大于内容,在接受者那里留下的当然就只是科学分析的结果了。 展开更多
关键词 因素构成 接受者 理论论述 科学分析 教育论述 习惯 整合 物的因素
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论大型起重机械的管理 被引量:1
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作者 樊友田 《建筑机械化》 2007年第12期47-50,共4页
从物与人两方面介绍了大型起重机械设备管理和控制的方法,为施工企业提高大型起重机械设备管理水平提供借鉴。
关键词 大型起重机械 使用管理 物的因素 的因素
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蒙牛乳业(宝鸡)有限公司安全管理要素解析
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作者 王敏强 车晓军 《企业改革与管理》 2021年第17期69-70,共2页
蒙牛乳业(宝鸡)有限公司是一家现代化大型乳制品生产企业,是一级安全生产标准化达标创建企业,曾先后荣获工业旅游示范企业、省和国家安全文化创建示范企业等荣誉称号,连续多年被评选为市、县级安全生产先进单位。本文主要从人、物、环... 蒙牛乳业(宝鸡)有限公司是一家现代化大型乳制品生产企业,是一级安全生产标准化达标创建企业,曾先后荣获工业旅游示范企业、省和国家安全文化创建示范企业等荣誉称号,连续多年被评选为市、县级安全生产先进单位。本文主要从人、物、环境和管理四个因素,通过蒙牛乳业(宝鸡)有限公司安全管理机构设置、制度建设、作业场所环境等方面的阐述,对公司安全管理的实践探索进行了梳理,以供参考借鉴。 展开更多
关键词 安全管理 的因素 物的因素 环境因素 管理因素
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