检索结果-南通市图书馆

地质科技动态 1989年第1期 21-23页

作者： Smit.,cb

碱性成纤维细胞生长因子在激素性股骨头缺血性坏死模型兔体内变化及桃红四物汤的干预

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

中国组织工程研究与临床康复 2007年第45期11卷 9047-9050页

作者：齐振熙杜传宝福建中医学院科技产业处福建省福州市350003 福建中医学院骨伤系福建省福州市350003

目的:已有研究证实,活血化瘀中药可对抗激素的作用,对激素性股骨头缺血性坏死早期有明显的防治作用。观察桃红四物汤对激素性股骨头缺血性坏死碱性成纤维细胞生长因子表达的影响,进一步阐明活血化瘀法防治激素性股骨头缺血性坏死的机制... 详细信息

目的:已有研究证实,活血化瘀中药可对抗激素的作用,对激素性股骨头缺血性坏死早期有明显的防治作用。观察桃红四物汤对激素性股骨头缺血性坏死碱性成纤维细胞生长因子表达的影响,进一步阐明活血化瘀法防治激素性股骨头缺血性坏死的机制。方法:实验于2005-04/2006-10在福建中医学院中心实验室完成。①实验材料:健康成年新西兰大白兔60只,雌雄各半,体质量1.8～2.2kg,清洁级,由福建中医学院实验动物中心购自上海市松江区松联实验动物场。桃红四物汤的组成成分为:桃仁、红花、熟地、当归、白芍、川芎。②实验方法:60只健康成年新西兰大白兔,随机分为正常组6只和实验组54只。实验组采用贺氏造模法建立股骨头缺血坏死模型,6周后处死正常组和实验组各6只,确定造模成功。将造模剩余动物随机分为中药治疗组和激素对照组,每组21只:中药治疗组以桃红四物汤7mL/kg(浓度为0.75g/mL)灌胃治疗,1次/d,激素对照组以生理盐水7mL/kg灌胃治疗,1次/d。③实验评估:于治疗后1,2,4周进行股骨头组织病理学观察,并采用放射免疫法检测血清碱性成纤维细胞生长因子含量变化。结果:纳入新西兰大白兔60只,实验过程中因心脏、脑血管梗死死亡18只,进入结果分析42只。桃红四物汤灌胃治疗1,2,4周后,中药治疗组股骨头局部空骨陷窝数明显减少,与激素对照组比较,差异有显著性意义(P<0.05),中药治疗组碱性成纤维细胞生长因子表达增强,与激素对照组相比,差异有显著性意义(P<0.01)。结论:桃红四物汤能促进激素性股骨头缺血性坏死模型兔体内碱性成纤维细胞生长因子的表达,明显减少股骨头局部空骨陷窝数,促进坏死股骨头的修复,这可能是活血化瘀法防治激素性股骨头缺血性坏死的机制之一。

关键词：桃红四物汤激素性股骨头缺血性坏死 bFGF 修复

Three dimensional temporal characteristics of ground motions and building responses in Wenchuan earthquake

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2009年第2期8卷 287-299页

作者： Dai Junwu Wang Yanru Guan Qingsong Qi Xiaozhai Yang Xueshan Tong Mai George C. lee Institute of Engineering Mechanics China Earthquake Administration Harbin 150080 China FEMA Washington DC USA MCEER University at Buffalo USA

In this paper, analytical results from 3D temporal characteristics of the responses of an RC frame building subjected to both a large aflershock and the main shock of Wenchuan M8.0 earthquake are presented. The ground motion records from the main shock were obtained from three nearby stations. The acceleration records were analyzed in terms of instantaneous tangential acceleration αv normal acceleration αN, Euclidean norm of acceleration vector lal, velocity vector ｜v｜, displacement vector ｜d｜, temporal curvature κ,κt, and temporal torsion γ and γ*** of the kinematic relationship between the above factors and some additional in depth information obtained from extensive analyses are provided and discussed.

关键词： 3D temporal characteristics analyses Wenchuan earthquake RC frame structure afiershock

A computational method to help identify and measure metallines in high resolution QSO spectra

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2011年第11期11卷 1279-1297页

作者： Xi-Heng Shi David Tytler Jin-Liang Hou David Kirkmant Jeffery lee Benjamin Ou Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of Sciences Shanghai 200030 China Center for Astrophysics and Space Sciences University of California San Diego La Jolla CA92093-0424 USA

A computational code is developed to help identify metal absorption lines in high resolution QSO spectra, especially in the Lyα forest. The input to the code includes a list of line central wavelengths, column densities and Doppler widths. The code then searches for candidate metal absorption systems and assesses the probability that each system could be real. The framework of the strategy we employ is described in detail and we discuss how to estimate the errors in line profile fitting that are essential to identification. A series of artificial spectra is constructed to calibrate the performance of the code. Due to the effects of blending and noise on Voigt profile fitting, the completeness of the identification depends on the column density of absorbers. For intermediate and strong artificial metal absorbers, more than 90% could be confirmed by the code. The results of applying the code to the real spectra of QSOs HS0757＋5218 and Q0100＋1300 are also presented.

关键词： methods data analysis-quasars absorption lines-quasars individual(HS0757+5218, Q0100+1300)

Improved method for measuring the δ15N compound-specific amino acids: Application on mesopelagic fishes in the South China Sea

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2022年第1期41卷 30-38页

作者： Fuqiang Wang Ying Wu Lin Zhang Jie Jin Zuozhi Chen Jun Zhang Wing-man lee State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China Center for Blue Life Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Department of Physical and Environmental Science Texas A&M University-Corpus ChristiTexa 78412USA Key Field Scientific Experimental Station of South China Sea Fishery Resource and Environment Ministry of Agriculture and Rural AffairsGuangzhou 510300China South China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesGuangzhou 510300China

Compound-specific stable isotope analysis of individual amino acids(CSIA-AA)has been widely used in ecological and biogeochemical *** has been proven to be powerful in tracing the diet sources and trophic ***,assessing the N sources of mesopelagic fishes has been inconclusive because the mesopelagic fishes’unique domain(water depth ranged from 0 to 1000 m)and unresolved nitrogen isotopes of various *** study proposes a new method for coupling instruments(ion chromatography and PreconIRMS)and chemical method of oxidation-reduction of amino acids,and also combinedδ15N of AAs withδ13C of fatty acids(FAs)to analyze the trophic interactions of mesopelagic fishes in the South China Sea(SCS).AAs were isolated by ion chromatography with high peak resolution and collected by an automated fraction *** chemical method then converted the AAs into N2 O with a robust oxidation yields and suitable molar ratio of NH2 OH ***,theδ15N of AAs at 20 nmol were measured with a reasonable precision(<0.6‰).With this method,this study report the first batch high precisionδ15N of AAs andδ13C of FAs of mesopelagic fishes collected from *** luetkeni,Chauliodus minimus and Bathygadus antrodes showed similarδ13C values of 20:4 n-6(~-28‰),while Argyropelecus affinis and Stomias had similar values(~-32‰).These results reflect that mesopelagic fishes had complex diet *** increase of 4‰inδ15N of glutamic acid(Glu)was found between piscivorous and planktivorous fishes,which might suggest a trophic discrimination factor of mesopelagic fishes in the *** study usedδ13C of 20:4 n-6 to reveal the diet sources of mesopelagic fishes andδ15N of Glu to clarify trophic level between piscivorous and planktivorous ***,this combinative method could therefore ultimately be applied in a variety of deep-sea ecosystem.

关键词： δ13C of fatty acids δ15N of amino acids ion chromatography mesopelagic fishes Precon-IRMS

cb—B10Y型齿轮泵的研制《提高油泵使用寿命的几个问题》

在线全文

学校读者我要写书评

暂无评论

东北石油大学学报 1979年第2期 95-100页

作者：大庆石油学院cb—B10Y型齿轮泵研制组

一、cb—B10Y型齿轮油泵的研制特点在大庆油田,引进了罗马尼亚F320型占机。这种钻机,在钻深井方面,有较好的技术性能。但是,在钻机上,润滑泥浆泵拉杆的齿轮油泵(以下简称为罗马泵),使用寿命确较短。约500小时左右,即出现泵“不上油”... 详细信息

一、cb—B10Y型齿轮油泵的研制特点在大庆油田,引进了罗马尼亚F320型占机。这种钻机,在钻深井方面,有较好的技术性能。但是,在钻机上,润滑泥浆泵拉杆的齿轮油泵(以下简称为罗马泵),使用寿命确较短。约500小时左右,即出现泵“不上油”而报废。这对钻井工作影响很大。大庆科委、要求我们研制小组:在最短期间内,研制出cb—B10Y型齿轮油泵,确保钻井前

关键词：齿轮泵回转式容积泵 B10Y 轴承间隙使用寿命 cb

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

急性冠脉综合征的危险分层和治疗决策制定

美国医学会杂志（中文版） 2001年第4期20卷 208-210页

作者： Ohma EM Gran cb Division of Cardiology Department of Medicine and Department of Community and Family Medicine Duke Clinical Research Institute Duke University Medical Center Durham NC

近年来急性冠脉综合征的治疗取得了长足的进步,正像80年代急性心肌梗死(MI)的治疗进展.当时纤维蛋白溶解和阿司匹林治疗显著降低了死亡率1.虽然这些治疗首先用于所有可疑MI的患者1,但ST段抬高或左束支阻滞的患者(即使不是全部)也获得了... 详细信息

近年来急性冠脉综合征的治疗取得了长足的进步,正像80年代急性心肌梗死(MI)的治疗进展.当时纤维蛋白溶解和阿司匹林治疗显著降低了死亡率1.虽然这些治疗首先用于所有可疑MI的患者1,但ST段抬高或左束支阻滞的患者(即使不是全部)也获得了极大的疗效2.此后,在普遍使用链激酶和组织纤溶酶原激活剂(tPA)治疗闭塞性冠状动脉(GUSTO-Ⅰ)的试验中,发现加速的tPA优于链激酶,30天的死亡率相对下降14%3.死亡率模式提示tPA治疗(不依赖其他因素)预后较好,该结果在所有亚组中均如此,与绝对危险性无关4.既然未发现不同的治疗效果,这说明几乎所有MI患者会从tPA治疗获益.

关键词：急性冠状动脉综合征治疗危险性