检索结果-南通市图书馆

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

使用厌氧混合消化反应器处理石化废水

青海环境 1993年第3期3卷 145-148页

作者： M.T.Augoustinos T.j.Britz R.P.tracey 杨青

本文介绍一种采用厌氧混合消化反应器对酸性石化废水进行厌氧处理的方法。该法在HRT(水力停留时间,以下类同)为17小时、有机负荷率为20.04(公斤.化学耗氧量/立方米.天的条件下,可获得挥发性有机酸去除率为91％,化学耗氧量去除率为84％... 详细信息

本文介绍一种采用厌氧混合消化反应器对酸性石化废水进行厌氧处理的方法。该法在HRT(水力停留时间,以下类同)为17小时、有机负荷率为20.04(公斤.化学耗氧量/立方米.天的条件下,可获得挥发性有机酸去除率为91％,化学耗氧量去除率为84％。反应器最终出水含氨氮为44毫克/升、含磷酸盐12.3毫克/升。

关键词：石化废水反应器处理厌氧有机负荷化学耗氧量停留时间上流式污泥床反应器技术处理性能反应器设计

用于蛋白快速分离的1-mm内径的高效聚合物整体材料

在线全文

学校读者我要写书评

暂无评论

生命科学仪器 2011年第2期9卷 22-25页

作者： Srinivasa RAO Kelly j.FLOOK Charanjit SAINI Maria REY Andy woodruff jim THAYER Yury AGROSKIN Christopher POHL 不详

多年来,整体技术已经成功地从概念阶段发展到表征良好且可重复的商用阶段。不同的整体柱化学材料,包括阴离子交换剂、阳离子交换剂和在ProSwift线性整体柱的反相功能基团,均可用于多种蛋白质的分离。与更大尺寸的色谱柱相比,1-mm内径的... 详细信息

多年来,整体技术已经成功地从概念阶段发展到表征良好且可重复的商用阶段。不同的整体柱化学材料,包括阴离子交换剂、阳离子交换剂和在ProSwift线性整体柱的反相功能基团,均可用于多种蛋白质的分离。与更大尺寸的色谱柱相比,1-mm内径的色谱柱在灵敏度提高和使用方便二者间达到了很好的协调。由于背压较小,这些整体柱可以在高动力学流速下运行,从而可以在标准的分析型色谱仪器上使用,而不需要微柱或者毛细管柱高效液相色谱系统。

关键词：快速分离蛋白质内径体材料聚合物阴离子交换剂阳离子交换剂液相色谱系统

手术前口服普瑞巴林用于缓解妇科小手术术后疼痛的随机安慰剂对照实验

在线全文

学校读者我要写书评

暂无评论

麻醉与镇痛 2008年第5期4卷 49-53页

作者： Michael j. Paech Raymond Goy Sebastian Chua Karen Scott tracey Christmas Dorota A. Doherty 彭宇(译) 蒋宗滨(校) Pharmacology and Anaesthesiology Unit School of Medicine and Pharmacology The University of Western Australia Department of Anaesthesia and Pain Medicine King Edward Memorial Hospital for Women Research Design and Biostatistics Unit Women and Infants Research Foundation Perth Western Australia Australia 不详

背景尽管普瑞巴林能有效治疗神经病理性疼痛，但是否能有效控制手术后疼痛仍证据不足。我们的研究目的是调查分析普瑞巴林对发生急性内脏痛的日间手术患者的镇痛效果。假设是普瑞巴林和安慰剂的镇痛效果差异无显著性。方法对90例行子宫... 详细信息

背景尽管普瑞巴林能有效治疗神经病理性疼痛，但是否能有效控制手术后疼痛仍证据不足。我们的研究目的是调查分析普瑞巴林对发生急性内脏痛的日间手术患者的镇痛效果。假设是普瑞巴林和安慰剂的镇痛效果差异无显著性。方法对90例行子宫手术的妇科小手术妇女进行随机双盲平行安慰剂对照试验。患者在手术前约1小时口服普瑞巴林100mg（PG组）或安慰剂（C组）。观察结果是患者在恢复室和手术后24小时的疼痛评分。结果两组患者在恢复室的疼痛评分（PG组的中位数、四分位间距分别为16和0～36；C组中位数、四分位间距分别为10和6．5—36，P=0．80）和此后所经历的疼痛差异无显著性；两组患者恢复室内芬太尼用量（PG组为42％，C组为27％，P=0．12）或手术后24小时恢复质量（PG组和c组的中位数、四分位间距分别为17、17—18小时和18、16．5～18，P=O．75）差异也无显著性。出院后轻度头晕、视觉障碍和行走困难的发生率普瑞巴林组明显高于安慰剂组。结论只进行单纯子宫操作的妇科小手术患者，手术前服用单次剂量普瑞巴林100mg不能减轻其手术后急性疼痛以及改善其恢复质量。

关键词：手术后疼痛随机安慰剂妇科小手术普瑞巴林术前口服对照实验神经病理性疼痛缓解

Surface-effects-dominated thermal and mechanical responses of zinc oxide nanobelts

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2006年第3期22卷 217-224页

作者： A. j. Kulkarni. M. Zhou The George W. woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta Georgia

t Molecular dynamics （MD） simulations are carried out to characterize the mechanical and thermal responses of [011^-1]-oriented ZnO nanobelts with lateral dimensions of 21.22A × 18.95 A, 31.02A× 29.42 A, and40.81A ×39.89A over the temperature range of 300-1000 K. The Young＇s modulus and thermal conductivity of the nanobelts are evaluated. Significant surface effects on properties due to the highsurface-to-volume ratios of the nanobelts are observed. For the mechanical response, surface-stress-induced internal stress plays an important role. For the thermal response, surface scattering of phonons dominates. Calculations show that the Young＇s modulus is higher than the corresponding value for bulk ZnO and decreases by -33% as the lateral dimensions increase from 21.22 A × 18.95A to 40.81 A × 39.89A. The thermal conductivity is one order of magnitude lower than the corresponding value for bulk ZnO single crystal and decreases with wire size. Specifically, the conductivity of the 21.22 A × 18.95 A belt is approximately （31-18）% lower than that of the 40.81 A × 39.89 A belt over the temperature range analyzed. A significant dependence of properties on temperature is also observed, with the Young＇s modulus decreasing on average by 12% and the conductivity decreasing by 50% as temperature increases from 300 K to 1000 K.

关键词： Zinc oxide nanobelts Surface effects Size dependence Young's modulus Thermal conductivity

ZnO-Embedded Expanded Graphite Composite Anodes with Controlled Charge Storage Mechanism Enabling Operation of Lithium-Ion Batteries at Ultra-Low Temperatures

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2023年第4期6卷 31-39页

作者： Kun Ryu Michael j.Lee Kyungbin Lee Seung Woo Lee George W.woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

As lithium(Li)-ion batteries expand their applications,operating over a wide temperature range becomes increasingly ***,the lowtemperature performance of conventional graphite anodes is severely hampered by the poor diffusion kinetics of Li ions(Li^(+)).Here,zinc oxide(ZnO) nanoparticles are incorporated into the expanded graphite to improve Li^(+)diffusion kinetics,resulting in a significant improvement in lowtemperature *** ZnO-embedded expanded graphite anodes are investigated with different amounts of ZnO to establish the structurecharge storage mechanism-performance relationship with a focus on lowtemperature *** analysis reveals that the ZnOembedded expanded graphite anode with nano-sized ZnO maintains a large portion of the diffusion-controlled charge storage mechanism at an ultra-low temperature of-50℃ Due to this significantly enhanced Li^(+)diffusion rate,a full cell with the ZnO-embedded expanded graphite anode and a LiNi_(0.88)Co_(0.09)Al_(0.03)O_(2)cathode delivers high capacities of 176 mAh g^(-1)at20℃ and 86 mAh g^(-1)at-50℃ at a high rate of 1 *** outstanding low-temperature performance of the composite anode by improving the Li^(+)diffusion kinetics provides important scientific insights into the fundamental design principles of anodes for low-temperature Li-ion battery operation.

关键词： diffusive and capacitive charge storages expanded graphite composites anode lithium-ion battery low-temperature operation transition metal oxide

Adult bobcat(Lynx rufus)habitat selection in a longleaf pine savanna

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2018年第1期7卷 206-217页

作者： Andrew R.Little L.Mike Conner Michael j.Chamberlain Nathan P.Nibbelink Robert j.Warren Warnell School of Forestry and Natural Resources University of Georgia180 E.Green StAthensGA 30602USA joseph W.jones Ecological Research Center at Ichauway NewtonGeorgia 39870USA

Background:Pine savannas are primarily managed with frequent prescribed fire(≤3 years)to promote diversity of flora and fauna,and to maintain open,park-like conditions needed by species such as the endangered red-cockaded woodpecker(Picoides borealis).However,a knowledge gap exists in our understanding of bobcat(Lynx rufus)habitat selection in longleaf pine savannas and research is warranted to direct our future management ***:We examined bobcat habitat selection in a pine savanna managed with frequent fires at two spatial scales(i.e.,study area boundary[hereafter,landscape scale])and annual area of use[95%kernel density;local scale],and assessed effects of prescribed fire on bobcat habitat ***,we monitored 45 bobcats(16 males and 29 females)during 2001–***:We found differential habitat selection by *** the landscape scale,female bobcats were closer to mixed pine-hardwoods,young pine,and secondary roads,but farther from mature pine and hardwoods stands relative to *** found no difference in selection of agriculture,shrub-scrub,and primary roads between *** the annual area of use scale,female bobcats were closer to secondary roads,but farther from agriculture and shrub-scrub relative to *** found no difference in selection of mature pine,mixed pine-hardwoods,hardwoods,young pine,and primary roads between *** primarily selected for stands burned≤1.1 years ***:Our results show that bobcats exploit a broad range of habitat types in pine landscapes managed with frequent fire and commonly use recently burned stands(≤1.1 year post-fire),suggesting prey in many areas of this system are at risk of bobcat ***,we suggest land managers consider scale of selection by bobcats when developing habitat management strategies.

关键词： Georgia Habitat selection Lynx rufus Pinus palustris Prescribed fire

Soft pneumatic actuators by digital light processing combined with injection-assisted post-curing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2021年第2期42卷 159-172页

作者： Qiang ZHANG Shayuan WENG Zeang ZHAO H.j.QI Daining FANG State Key Laboratory for Turbulence and Complex System College of EngineeringPeking UniversityBeijing 100871China College of Aerospace Engineering Chongqing UniversityChongqing 400044China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China The George W.woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332U.S.A.

The soft robotics display huge advantages over their rigid counterparts when interacting with living organisms and fragile *** one of the most efficient actuators toward soft robotics,the soft pneumatic actuator(SPA)can produce large,complex responses with utilizing pressure as the only input *** this work,a new approach that combines digital light processing(DLP)and injection-assisted post-curing is proposed to create SPAs that can realize different *** enable this,we develop a new class of photo-cross linked elastomers with tunable mechanical properties,good stretchability,and rapid curing *** carefully designing the geometry of the cavities embedded in the actuators,the resulting actuators can realize contracting,expanding,flapping,and twisting *** addition,we successfully fabricate a soft self-sensing bending actuator by injecting conductive liquids into the three-dimensional(3D)printed actuator,demonstrating that the present method has the potential to be used to manufacture intelligent soft robotic systems.

关键词： soft pneumatic actuator(SPA) digital light processing(DLP) injectionassisted post-curing three-dimensional(3D)printing

慢性病毒性肝炎患者服用阿司匹林与肝细胞癌发生率及肝病相关死亡率的关系

在线全文

学校读者我要写书评

暂无评论

临床肝胆病杂志 2020年第6期36卷 1406-1406页

作者：赵旭高普均 tracey GS ANN-SOFI D SOO A 吉林大学第一医院肝胆胰内科不详

【据《N Engl j Med》2020年3月报道】题:服用阿司匹林与肝细胞癌发生率及肝病相关死亡率的关系(作者tracey GS等)目前,慢性HBV、HCV感染人群服用小剂量阿司匹林(≤160 mg)是否对肝细胞癌发生率、肝病相关死亡率和胃肠道出血风险产生长... 详细信息

【据《N Engl j Med》2020年3月报道】题:服用阿司匹林与肝细胞癌发生率及肝病相关死亡率的关系(作者tracey GS等)目前,慢性HBV、HCV感染人群服用小剂量阿司匹林(≤160 mg)是否对肝细胞癌发生率、肝病相关死亡率和胃肠道出血风险产生长期影响,尚需要更多研究数据来阐明。

关键词：慢性病毒性肝炎肝细胞癌胃肠道出血阿司匹林 HCV感染肝病死亡率发生率

Mechanochemistry of catch bonds between integrins and ligands

在线全文

学校读者我要写书评

暂无评论

Mechanochemistry of catch bonds between integrins and ligand...