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2016-2021年句容市医疗机构消毒质量监测分析

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医学动物防制 2024年第3期40卷 303-306页

作者：曹静曾萍陈军岁源陈澍张军刘宇句容市疾病预防控制中心检验科江苏镇江212400

目的了解句容市各级医疗机构消毒工作现状,为提高医疗机构的消毒质量提供科学依据。方法 2016-2021年对句容市23家医疗机构随机抽样,采用SPSS 22.0软件进行χ^(2)检验,比较不同医疗机构和各类消毒对象的监测合格率,检验水准α=0.05。结... 详细信息

目的了解句容市各级医疗机构消毒工作现状,为提高医疗机构的消毒质量提供科学依据。方法 2016-2021年对句容市23家医疗机构随机抽样,采用SPSS 22.0软件进行χ^(2)检验,比较不同医疗机构和各类消毒对象的监测合格率,检验水准α=0.05。结果 2016-2021年句容市医疗机构共监测样本3 541份,3 327份合格,合格率为93.96%,合格率先下降后上升,总体呈上升趋势(χ^(2)_(趋势)=35.855,P<0.01)。8种监测对象中合格率相对偏低的项目有物体表面(94.83%)、医务人员手卫生(92.35%)和医院污水(82.00%);不同级别医疗机构中,社会医疗机构一次性医疗用品和物体表面合格率均低于较高级别医疗机构。结论句容市医疗机构总体消毒质量较好,呈上升趋势,但仍存在一些薄弱环节,需重点关注医院污水和社会医疗机构的消毒质量管理。

关键词：医疗机构消毒监测质量分析院内感染合格率

Characterization of Fe_3Si-based coatings on low silicon steel by pulsed Nd:YAG laser cladding

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 208-214页

作者： Dan-yang Dong Chang-sheng Liu sui-yuan Chen Bin Zhang Key Laboratory for Anisotropy and Texture of Materials of the Ministry of Education of China Northeastern University Shenyang 110004 China School of Science College Northeastern University Shenyang 110004 China

The Fe3Si based coating was produced on the Fe-1 Si steel surface by a pulsed Nd：YAG （yttrium aluminum garnet） laser. Its phase constitution and microstructure were characterized by using X-ray diffraction （XRD）, optical microscope （OM）, and field emission scanning electron microscope （FESEM） with associated energy dispersive spectroscopy （EDS） and transmission electron microscopy （TEM）. The hyperfine structure of the coating was studied by Mrssbauer spectra （MS） and the magnetic property was also measured at room temperature by a vibrating sample magnetometer （VSM）. The obtained coating is pore and crack-free with dense microstructure and high Si content. The metallurgical bonding between the coating and the substrate was realized. The microstructure of the coating is typical fine dendrites. The major phase was confirmed by XRD and TEM to be the ordering D03 structured Fe3Si phase. In addition, there were smaller amounts of the Fe5Si3 phase and the γ-Fe phase in the coating. Compared with the substrate, the laser cladding coating has a lower saturation magnetization and a higher coercive force. The poor magnetic property might be because of rapid solidification microstructure and phase constitution in the coating.

关键词： silicon steel laser cladding hyperfine structure magnetic property

阿达木单抗联合地塞米松玻璃体腔植入剂治疗难治性非感染性葡萄膜炎性黄斑水肿

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国际眼科杂志 2024年第1期24卷 36-41页

作者：隋源孙敬文张成森李雪丽勾晓梅哈尔滨二四二医院眼科中国黑龙江省哈尔滨市150000

目的:探讨阿达木单抗联合地塞米松玻璃体腔植入剂治疗难治性非感染性葡萄膜炎性黄斑水肿(UME)的效果。方法:选取2020-01/2022-01我院收治的难治性非感染性UME患者92例131眼,随机分为对照组(46例63眼,接受地塞米松玻璃体腔植入剂治疗)和... 详细信息

目的:探讨阿达木单抗联合地塞米松玻璃体腔植入剂治疗难治性非感染性葡萄膜炎性黄斑水肿(UME)的效果。方法:选取2020-01/2022-01我院收治的难治性非感染性UME患者92例131眼,随机分为对照组(46例63眼,接受地塞米松玻璃体腔植入剂治疗)和观察组(46例68眼,接受阿达木单抗皮下注射联合地塞米松玻璃体腔植入剂治疗)。分别于治疗前后检测最佳矫正视力(BCVA)、中心凹视网膜厚度(CRT)、玻璃体炎性混浊程度以及Th17/Treg细胞因子水平,记录不良反应发生情况。结果:纳入患者失访3例4眼。治疗1、3、6、12 mo,两组患者BCVA均较治疗前改善,CRT、玻璃体炎性混浊程度评分、血清白细胞介素(IL)-17、IL-22水平均较治疗前降低,血清转化生长因子-β(TGF-β)、IL-10水平均较治疗前升高,且观察组患者BCVA优于对照组,CRT、玻璃体炎性混浊程度评分、血清IL-17、IL-22水平均低于对照组,血清TGF-β、IL-10水平均高于对照组(均P<0.05)。治疗及随访期间,两组患者均未出现严重的不良反应。结论:阿达木单抗联合地塞米松玻璃体腔植入剂治疗难治性非感染性UME可显著促使黄斑水肿消退,减轻玻璃体炎性混浊,改善视力。

关键词：葡萄膜炎性黄斑水肿阿达木单抗地塞米松玻璃体腔植入辅助性T细胞17/调节性T细胞

Contrasting responses of legume versus non-legume shrubs to soil water and nutrient shortages in the Mu Us Sandland

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Journal of Plant Ecology 2011年第4期4卷 268-274页

作者： yuan sui Qingguo Cui Ming Dong Weiming He State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesNo.20 NanxincunXiangshanHaidian DistrictBeijing 100093China Graduate University of Chinese Academy of Sciences 19A YuquanluBeijing 100049China

Legumes and non-legumes usually differ in using soil water and *** water and nutrients are scarce in the semi-arid Mu Us Sandland where legume and/or non-legume shrubs coexist/***,we addressed the responses of legume versus nonlegume shrubs to different soil water and nutrient *** We conducted an experiment in which a legume(Hedysarum laeve)and a non-legume(Artemisia ordosica)were used,both of which are dominant species in the Mu Us *** of these two species were subjected to three water levels(45.0,67.5 and 90.0 ml every 3 days)and three nutrient treatments(0,0.1%and 0.2%nutrient solution every week)during the *** Findings Interactions between water and nutrients on total biomass,root weight ratio and rain use efficiency(RUE)were detected in *** but not in ***,suggesting that water effects on *** but not on *** are dependent on soil *** addition alleviated drought stress and increased RUE in *** interspecific differences in response to soil water and nutrients may be linked to the ability of plants to fix *** addition,under lowsoil water or nutrient conditions,*** produced more biomass than ***,and the opposite was the case under high-soil *** relationship between relative growth rate(RGR)and RUE[or nutrient use efficiency(NUE)]varied with two *** of *** was positively correlated with both RUE and NUE while RGR of *** was negatively correlated with *** different responses may be linked to the trade-off between high-growth rate and low-resource use efficiency.

关键词： biomass legume versus non-legume rain use efficiency resource use strategies root weight ratio

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基于温度场的隔膜压缩机气缸的结构优化

压缩机技术 2024年第4期 42-46页

作者：曹家维巴鹏白皓元隋沅晟沈阳理工大学机械工程学院辽宁沈阳110000

为了解决排气温度过高使隔膜压缩机抗氢脆性能降低从而导致寿命降低的问题,提出了一种新型冷却管道的隔膜压缩机结构。以降低隔膜压缩机气缸温度为目标,在高温、高压的工况下,对改进后的气缸结构进行流体力学分析研究,得到温度场云图。... 详细信息

为了解决排气温度过高使隔膜压缩机抗氢脆性能降低从而导致寿命降低的问题,提出了一种新型冷却管道的隔膜压缩机结构。以降低隔膜压缩机气缸温度为目标,在高温、高压的工况下,对改进后的气缸结构进行流体力学分析研究,得到温度场云图。仿真结果表明:优化后的隔膜压缩机气缸结构在同样工况下的温度明显降低,可知压缩机气缸的氢脆问题得到缓解,该结构有效提高了隔膜压缩机的使用寿命。

关键词：隔膜压缩机气缸抗氢脆结构优化流体力学温度场

Ecotoxicity assessment of soil irrigated with domestic wastewater using different extractions

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Frontiers of Environmental Science & Engineering 2015年第4期9卷 685-693页

作者： Wenyan LIANG Lili sui yuan ZHAO Feizhen LI Lijun LIU Di XIE College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China

The toxicity of soil irrigated with treated domestic wastewater （site A） and untreated gray wastewater （site B） were investigated. Soil extracts were prepared using distilled water, acid solvent （0.1 mol·L-1 HCl）, and organic solvent （acetone：petroleum ether：cyclohexane= 1：1：1） to understand the type of pollutants responsible for the ecotoxicity associated with wastewater irrigation. The soil toxicity was assessed using a luminescence inhibition assay with Vibrio fischeri for acute toxicity, a micronucleus assay with Vicia faba root tips and a single cell gel electrophoresis assay of mice lymphocytes for genotoxicity. The physicochemical properties and the heavy metal （HM） contents of the irrigated soil were also analyzed. The results indicated that the wastewater irrigation at site A had no effects on the soil properties. With the exception of Pb, Zn, Fe, and Mn, the accumulation of HMs （Cu, Ni, and Cr） occurred. However, the irrigation at site A did not result in obvious acute toxicity or genotoxicity in the soil. The soil properties changed greatly, and HMs （Cu, Ni, and Cr） accumulated in site B. There were significant increases in the acute toxic and genotoxic effects in the soils from site B. The ecotoxicity in site B came primarily from organic-extractable pollutants.

关键词： ecotoxicology domestic wastewater soil irrigation risk assessment organic extraction

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超声骨组织手术设备工作尖注册技术审评探讨

中国医疗器械信息 2024年第13期30卷 12-14,53页

作者：袁榕穗卢静熊钊陆梅元蒋受军广西壮族自治区食品药品审评查验中心广西南宁530029

超声骨组织手术设备工作尖产品尚无相应的国内外标准和行业标准可供参考,性能研究和临床评价方面缺乏相应的借鉴经验。文章通过研究超声骨组织手术设备工作尖产品注册审评要点,探讨注册技术审评中应关注的问题,从产品名称、型号规格、... 详细信息

超声骨组织手术设备工作尖产品尚无相应的国内外标准和行业标准可供参考,性能研究和临床评价方面缺乏相应的借鉴经验。文章通过研究超声骨组织手术设备工作尖产品注册审评要点,探讨注册技术审评中应关注的问题,从产品名称、型号规格、结构组成、管理类别和分类编码、适用范围、产品技术要求、产品性能研究等多方面进行分析研究,为开展超声骨组织手术设备工作尖技术审评提供一定的参考。

关键词：医疗器械超声骨组织手术设备工作尖审评要点

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基于挠度指数的隔膜压缩机膜腔的结构优化

压缩机技术 2024年第1期 20-24页

作者：隋沅晟张秀珩曹家维白皓元沈阳理工大学机械工程学院辽宁沈阳110000

为了解决隔膜压缩机中膜片经常破裂的问题,以某FB型隔膜压缩机为原型,对膜片组运行机理进行研究,探索膜腔挠度指数变化时对膜片运行情况的影响。基于薄板大挠度理论计算得出膜片上下表面所受应力最大的位置,通过改变膜腔挠度指数,得出... 详细信息

为了解决隔膜压缩机中膜片经常破裂的问题,以某FB型隔膜压缩机为原型,对膜片组运行机理进行研究,探索膜腔挠度指数变化时对膜片运行情况的影响。基于薄板大挠度理论计算得出膜片上下表面所受应力最大的位置,通过改变膜腔挠度指数,得出膜片所受应力最小的膜腔型线。运用有限元分析软件进行模拟仿真,结果验证了膜片上表面的中心处和膜片下表面的边缘处最易破坏,同时得出膜腔型线的挠度指数在2.9时,可使膜片的上下表面所受应力最小且应力强度几乎相等,优化后的膜片所受径向应力相比优化前下降了14%左右,延长了膜片的使用寿命。

关键词：隔膜压缩机膜片组有限元分析挠度指数

Nanocrystallization of Amorphous Fe_(73.5)Cu_1Nb_3Si_(13.5)B_9 Irradiated by Laser

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Journal of Iron and Steel Research International 2005年第5期12卷 58-62页

作者： CHEN sui-yuan LIU Chang-sheng ZHOU Li LI Hui-li CAI Qing-kui Northeastern Univcrsity Shenyang 110004 China

The surface nanocrystallization of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by CO2 laser was studied by means of M（oe）ssbauer spectroscopy, transmission electro iroscope and X-ray diffraction. The result shows that under certain technical conditions, nanocrystalline is fiound on the surface of amorphous Fe73.5 Cu1Nb3Si13.5B9 radiated by laser; the crystallization phase is α-Fe（Si） crystalline, and its size is about 10-20 nm; the nanocrystalline is uniformly distributed on amorphous base to keep the amorphous and crystallized phase in balance; the a mount of crystallization reaches 23% when the laser power is 300 W, the diameter of light spot is 20 mm, and the radiation speed is 20 mm/s. The phase balance can be controlled by adjusting the laser technology parameter. Laser radiation on the amorphous Fe73.5 Cu1Nb3Si13.5B9 alloy is an important technique for surface nanocrystallization of the amorphous alloys.

关键词： CO2 laser amorphous alloy Fe73.5 Cu1Nb3Si13.5B9 nanocrystallization