检索结果-南通市图书馆

Open Journal of Biophysics 2012年第4期2卷 137-143页

作者： Bryce P. mulligan Noa Gang glenn H. Parker michael A. Persinger Department of Biology Behavioural Neuroscience Program Department of Biology Behavioural Neuroscience Program Biomolecular Sciences Program Laurentian UniversitySudbury Canada Department of Biology Behavioural Neuroscience ProgramBiomolecular Sciences Program Laurentian UniversitySudbury Canada

Synergistic interactions between specific magnetic field intensities and chemical concentrations are challenging biophysical phenomena. Planarian were exposed to one of five different concentrations of melatonin and to a “geomagnetic”—patterned 7 Hz amplitude modulated magnetic field for 6 min once per hour for 8 hr during six successive nights. The peak average strengths were within the range (50 nT) or outside the range (200 nT) derived by the equation. As predicted by a resonance equation planarian displayed highly statistically significant decreased relative activity within the 50 nT, 10–7 to 10–6 m melatonin conditions compared to lower or higher concentrations. The effect explained about 30% of the variance in these changes of activity. Activity of planarian exposed to the same melatonin concentrations but to the 200 nT field did not differ significantly from each other or from those exposed to the 50 nT field in concentrations of melatonin –7 m or >10–6 m. These results suggest the existence of non-linear, “narrow-band” mechanisms involving the numbers of molecules within a distance determined by the boundary of the organism and the intensity of naturally-patterned magnetic fields derived from energy rather than force-based resonances.

关键词： Resonance Planarian melatonin magnetic Fields 7 Hz

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电刺激膈神经横膈起搏

国外医学.神经病学神经外科学分册 1987年第4期 193-196页

作者： glenn W WL Phelps m L 陈忠平

电刺激可兴奋组织在理论上已达到可以获得任何需求的生理反应的精确程度。本文旨在复习有关以电刺激治疗慢性换气功能减退方面的进展。

关键词：隔神经运动神经元隔肌呼吸中枢传出神经元电刺激起搏器

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

预防造影剂肾病回到基础

美国医学会杂志（中文版） 2005年第6期24卷 374-375页

作者： glenn m. Chertow,mD, mPH 邹古明（译）谌贻璞（校） Division of Nephrology Departments of Medicine Epidemiology and Biostatistics University of California San Francisco. 不详

在本期杂志，merten及其同事^1向我们提供了造影剂肾病的重要资料，该病正在成为急性肾脏病的研究热点。作者在119例基线血清肌酐至少1．1mg／dL的患者比较了0．9％氯化钠溶液与等渗碳酸氢钠溶液对造影剂肾病的预防作用。两者均于造影术... 详细信息

在本期杂志，merten及其同事^1向我们提供了造影剂肾病的重要资料，该病正在成为急性肾脏病的研究热点。作者在119例基线血清肌酐至少1．1mg／dL的患者比较了0．9％氯化钠溶液与等渗碳酸氢钠溶液对造影剂肾病的预防作用。两者均于造影术前1小时开始以每小时3mL／kg的速度给药，并于造影后以每小时1mL／kg的速度继续给药6小时。碳酸氢钠组只有不足2％患者出现造影剂肾病（其定义为造影后血清肌酐上升≥25％），而生理盐水组发生率则高达14％。碳酸氢钠组造影剂肾病2％的发生率也在随后进行的开放性随访登记（open-label follow-up registry）观察中得到证实。作者认为碳酸氢钠对尿液pH值的影响可使氧自由基生成减少，从而减轻造影剂肾损伤。

关键词：造影剂肾病预防作用碳酸氢钠溶液血清肌酐氯化钠溶液生理盐水组自由基生成造影术前发生率肾脏病

生草制果园中不同清耕区面积对幼龄桃树生长和产量的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国外农学（果树） 1990年第4期 9-12页

作者： W.V.Welker D.m.glenn 过国南

桃园种植牛尾草,并设不同面积(0.36～13m^2/株)清耕区。4年研究结果表明,树体生长量、叶片氮含量和果实产量随清耕区面积的增大而增加。当清耕区为9m^2/株时,树体生长表现最好。在整个试验过程中,树体生长与清耕区面积大小呈正比。叶片... 详细信息

桃园种植牛尾草,并设不同面积(0.36～13m^2/株)清耕区。4年研究结果表明,树体生长量、叶片氮含量和果实产量随清耕区面积的增大而增加。当清耕区为9m^2/株时,树体生长表现最好。在整个试验过程中,树体生长与清耕区面积大小呈正比。叶片含氧量随年份有所下降。牛尾草明显抑制了桃树根系的生长范围,从而控制了树体的生长。

关键词：桃树生长生草制果园清耕区

在线全文

学校读者我要写书评

暂无评论

制冷剂特性数据解析与更新

制冷与空调 2007年第5期7卷 61-73,98页

作者： James m.Calm glenn C.Hourahan 白雪莲 Engineering Consultant Air Conditioning Contractorts of America 重庆大学

介绍制冷剂主要的物理特性、安全性、环境特性等方面的数据,这些制冷剂包括过去广泛使用的、当前普遍使用的以及将来使用的。

关键词：制冷剂特性

在线全文

学校读者我要写书评

暂无评论

幼龄桃树对地被布局的生长反应

国外农学（果树） 1992年第2期 7-8页

作者： W.V.Welker D.m.glenn 杨槐俊

杂草及草地的竞争会严重削弱幼龄桃树的生长;除草剂可有效地控制定植桃树的地被物;幼龄桃树的营养和生长受地被面积大小的影响。本研究的目的在于评估地被布局对幼龄桃树生长的影响。

关键词：桃树幼树地被布局生长

USDA-ARS National Sedimentation Laboratory:A Historic Perspective

在线全文

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2015年第3期7卷 228-246页

作者： Robert R.Wells Sean J.Bennett Ronald L.Bingner Seth m.Dabney Eddy J.Langendoen Henrigue G.momm mathias J.m.Romkens glenn V.Wilson Agricultural Research Service United States Department of AgricultureOxfordUSA Department of Geography University at BuffaloBuffaloUSA Department of Geosciences Middle Tennessee State UniversityMurfreesboroUSA

most authorities concede sediment from soil erosion to be the largest single stream pollutant. Physical damage from sediment includes reservoir storage loss, navigation channel filling, stream channel morphology alterations, ecological impacts, and clogging of drainage pathways. Ultimately, soil erosion is a very expensive problem. In the United States, accelerated soil erosion has been an ongoing issue since the establishment of the colonies. Through the initiative of great minds and the labor of countless individuals, the USDA was established and continues to fight for the people, providing assistance, guidance, and research. In this manuscript, the historical groundwork is laid for the establishment of the USDA-ARS National Sedimentation Laboratory (NSL) and a synopsis of NSL research is provided. This brief perspective of soil erosion research conducted on behalf of the people is but a small portion of the illustrious history of the USDA.

关键词： Soil Erosion Sedimentation Ephemeral Gully Water Quality modeling

LL-37 induced cystitis and the receptor for advanced glycation end-products (RAGE) pathway

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Bioscience and Biotechnology 2013年第8期4卷 1-8页

作者： Lindsi mcCoard Roundy Wanjian Jia Jianxing Zhang Xiangyang Ye glenn D. Prestwich Siam OottamasathienQ Department of medicinal Chemistry and Center for Therapeutic Biomaterials University of Utah Salt Lake City USA Department of Pharmacotherapy Primary Children’s Medical Center University of Utah Salt Lake City USA Department of Surgery and Division of Pediatric Urology Primary Children’s Medical Center Salt Lake City USA

To elucidate pathways in bladder inflammation, we employed our physiologically relevant LL-37 induced cystitis model. Based on inflammatory studies involving other organ systems implicating the receptor for advanced glycation end-products (RAGE), we first hypothesized that RAGE is critically involved in LL-37 induced cystitis. We further hypothesized that?a common RAGE ligand high mobility group box 1 (HmGB1) is up-regulated in bladders challenged with LL-37. Finally, we hypothesized that NF-κB dependent inflammatory genes are activated in LL-37 induced cystitis. Testing our first hypothesis, C57Bl/6 mice were challenged with either saline (control) or 320 μm of LL-37 intravesically for 1 hr. After 12 or 24 hours, tissues were examined with immunohistochemistry (IHC) for RAGE, and both mRNA and protein isolation for respective qRT-PCR and Western Blot analysis. Our second hypothesis was tested by employing HmGB1 IHC. Testing our final hypothesis, qRT-PCR was performed investigating five genes: TNFα, IL-6, IL-1β, Gm-CSF, COX-2. In control and LL-37 challenged tissues, IHC for RAGE revealed similar qualitative expression. Evaluation with qRT-PCR and Western Blot for RAGE revealed diminished expression at the mRNA and protein level within LL-37 challenged bladders. IHC for HmGB1 revealed a moderate qualitative increase within LL-37 challenged tissues. Finally, with the exception of TNFα, all NF-κB dependent inflammatory genes yielded substantial up-regulation. We have employed our LL-37 induced cystitis model to gain insight to wards a possible mechanistic pathway involved in bladder inflammation. This work provides data for future studies involving the inflammatory ligand HmGB1, RAGE, and receptor pathways that activate NF-κB.

关键词： LL-37 Cathelicidin Bladder Inflammation Bladder Fibrosis Spina Bifida myelomeningocele Interstitial Cystitis RAGE HmGB1 NF-Kappa B

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

海洋平台支撑导管腐蚀缺陷的检测和监测技术

海洋平台支撑导管腐蚀缺陷的检测和监测技术

Fire hazard in transportation infrastructure:Review,assessment,and mitigation strategies

山东石油学会第六届腐蚀与防护技术学术交流会

作者：李金武 glenn m Light Hegeon Kwun 美国西南研究院

海洋平台容易遭受到恶劣的海洋腐蚀环境的腐蚀,腐蚀等缺陷的存在,对海洋平台安全可靠的运行提出了更高的要求;针对海洋平台导管的腐蚀检测技术的状况,特别是在海洋水下环境中检测所存在的实际操作的难度和检测可靠性低的特点。介绍了ms... 详细信息

海洋平台容易遭受到恶劣的海洋腐蚀环境的腐蚀,腐蚀等缺陷的存在,对海洋平台安全可靠的运行提出了更高的要求;针对海洋平台导管的腐蚀检测技术的状况,特别是在海洋水下环境中检测所存在的实际操作的难度和检测可靠性低的特点。介绍了msS磁致伸缩超声导波技术和仪器,特别是该传感器可方便地粘接在导管水面部位,进行长期的腐蚀缺陷的监测,为海洋平台的长期可靠提供了更有效的手段。

关键词：无损检测磁致伸缩导波海洋平台缺陷检测监测

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2021年第1期15卷 46-60页

作者： Venkatesh KODUR m.Z.NASER Department of Civil and Environmental Engineering Michigan State UniversityEast LansingMI 48824-1226USA glenn Department of Civil Engineering Clemson UniversityClemsonSC 29634USA

This paper reviews the fire problem in critical transportation infrastructures such as bridges and *** magnitude of the fire problem is illustrated,and the recent increase in fire problems in bridges and tunnels is *** research undertaken to address fire problems in transportation structures is reviewed,as well as critical factors governing the performance of those ***,key strategies recommended for mitigating fire hazards in bridges and tunnels are presented,and their applicability to practical situations is demonstrated through a practical case ***,research needs and emerging trends for enhancing the“state-of-the-art”in this area are discussed.

关键词： fire hazard bridges tunnels fire resistance mitigation strategies transportation infrastructure