检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

结构钢端淬曲线预测新方法

金属学报 2006年第4期42卷 405-410页

作者：金满连建设江中浩吉林大学材料科学与工程学院长春130025

端淬试样硬度分布模型采用了含有待定参数-淬透性系数的解析函数,本文定义的钢的淬透性系数与现有合金元素的淬透性系数不同,其大小直接决定端淬曲线的递减速率．端淬曲线的计算预测问题转化成淬透性系数的求解．在端淬实验标准状态下,... 详细信息

端淬试样硬度分布模型采用了含有待定参数-淬透性系数的解析函数,本文定义的钢的淬透性系数与现有合金元素的淬透性系数不同,其大小直接决定端淬曲线的递减速率．端淬曲线的计算预测问题转化成淬透性系数的求解．在端淬实验标准状态下,淬透性系数取决于钢的化学成分．用分部逼近法建立了结构钢淬透性系数与化学成分之间的关系式．将计算获得的淬透性系数代入到硬度分布模型对端淬曲线进行了预测,结果表明预测曲线与实验值吻合很好．

关键词：结构钢端淬曲线淬透性系数化学成分

Effects of Acute Normovolemic Hemodilution on Perioperative Coagulation and Fibrinolysis in Elderly Patients Undergoing Hepatic Carcinectomy

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Sciences Journal 2010年第3期25卷 146-150页

作者： Jian-rong Guo Jun Yu Xiao-ju jin jin-man Du Wei Guo Xiao-hong Yuan Department of Anesthesiology Lihuili Hospital Medical School of Ningbo University Ningbo 315040 China Department of Anesthesiology Yijishan Hospital Wannan Medical College Wuhu 241001 China

Objective To observe the effects of acute normovolemic hemodilution （ANH） on coagulation function and fibrinolysis in elderly patients undergoing hepatic carcinectomy. Methods Thirty elderly patients （aged 60-70 years） with liver cancer （American Society of Anesthesiologists physical status I-II） scheduled for hepatic carcinectomy from February 2007 to February 2008 were randomly divided into ANH group （n= 15） and control group （n= 15）. After tracheal intubation, patients in ANH group and control group were infused with 6% hydroxyethyl starch （HES）（130/0.4）, and basic liquid containing 6% HES and routine Ringer＇s solution, respectively. In all the studied patients, blood samples were drawn at five different time points： before anesthesia induction （T1）, 30 minutes after ANH （T2）, 1 hour after start of operation （T3）, immediately after operation （T4）, and 24 hours after operation （Ts）. Then co- agulation function, soluble fibrin monomer complex （SFMC）, prothrombin fragment （F1＋2）, and platelet membrane glycoprotein （activated GPIIb/GPIIIa and P-selectin） were measured. Results The perioperative blood loss was not significantly different between the two groups （P〉 0.05）. The volume of allogeneic blood transfusion in ANH group was significantly smaller than that in control group （350.5±70.7 mL vs. 457.8±181.3 mL, P〈0.01）. Compared with the data ofT1, prothrombin time （PT） and activated partial thromboplastin time in both groups prolonged significantly after T3 （P〈0.05）, but still within normal range. There were no significant changes in thrombin time and D-dimer between the two groups and between different time points in each group （all P〉0.05）. SFMC and F1 ＋2 increased in both groups, but without statistical significance. P-selectin expression on the platelet surface of ANH group was significantly lowered atT2 andT3 compared with the level atT1 （P〈 0.05）. Compared with control group, P-selectin was sig-nificantly lower in ANH group atT2-T3 （all P〈0.05）. Conclusion

关键词： hepatic carcinectomy acute normovolemic hemodilution coagulationfunction fibrinolysis

An easy PCR-based genome-walking method for getting the unknown 5’flanking region of a Scenedesmus sp.

在线全文

学校读者我要写书评

暂无评论

Journal of Coastal Life Medicine 2015年第5期 348-351页

作者： Ahmed Elsayed Gomma jin man Kim Seung Hwan Yang Gyuhwa Chung Department of Biotechnology Chonnam National UniversityYeosuChonnam 550-749Korea Center for Nutraceutical and Pharmaceutical Materials Myongji UniversityCheoin-guYonginGyeonggi-Do 449-728Korea

Objective:To develop the current single primer PCR-based genome-walking method with Scenedesmus ***:The unknown 5’and/or 3’flanking regions for a specific conserved sequence were optimized and the current single primer PCR-based genome-walking method were *** was between the related species of microalga and Scenedesmus *** 18S rDNA,we selected the species Scenedesmus sp.,Chlorella sp.,and Chlamydomonas *** the rbcL gene from the chloroplast genome,alignment was done between Scenedesmus sp.,and Chlamydomonas ***:Obtaining a small conserved sequence for any gene family is something that can be achieved quite ***,identifying the whole gene is often *** investigating and testing,some of the current protocols using to get the unknown 5’and/or 3’flanking regions for a specific conserved sequence,we developed the current single primer PCR-based genome-walking *** performed two consecutive PCR reactions;band extraction and the PCR product were *** got our results by testing the method on three genes from the total DNA of Scenedesmus sp.;two genes had a fully known sequence in gene bank(18S rDNA and rbcL),but the third one has not yet been identified(rbcS).We designed our primers based on the alignment between the related species and to each *** also tested two different DNA polymerases Ex Taq and TLA ***:Results from our study suggest that Ex Taq is the most suitable polymerase for the current protocol.

关键词： Single primer PCR PCR-based genome-walking rbcS rbcL 18S rDNA 5’flanking region Ex Taq TLA polymerase

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

地聚合物固化重金属Pb^(2+)的研究

环境科学 2011年第5期32卷 1447-1453页

作者：金漫彤金赞芳黄彩菊浙江工业大学生物与环境工程学院杭州310032

利用偏高岭土、水玻璃、氢氧化钠和水合成地聚合物,并以地聚合物固化Pb2+.通过固化体的抗压强度和Pb2+浸出浓度来表征固化效果,通过XRD、SEM、FTIR等手段对地聚合物固化体终产物的结构进行分析,并从固化效果、微观结构、矿物结构等方面... 详细信息

利用偏高岭土、水玻璃、氢氧化钠和水合成地聚合物,并以地聚合物固化Pb2+.通过固化体的抗压强度和Pb2+浸出浓度来表征固化效果,通过XRD、SEM、FTIR等手段对地聚合物固化体终产物的结构进行分析,并从固化效果、微观结构、矿物结构等方面,将其与水泥固化作对比,分析地聚合物固化重金属和水泥固化重金属在机制上的区别.结果表明,当Pb2+掺加量<3%时,地聚合物对Pb2+的捕集效率达到99.7%以上,固化体抗压强度在40～50 MPa.当Pb2+掺加量相同时,地聚合物固化体的抗压强度明显高于水泥固化体,Pb2+浸出浓度明显低于水泥固化体.分析地聚合物固化Pb2+的机制主要是由于Pb2+参与了地聚合物结构的形成,或被地聚合物骨架中铝离子所吸附,Pb2+被包容在聚合体中.而水泥固化Pb2+主要依靠物理固封或吸附机制.因此无论从固化体的抗压强度、浸出浓度等理化性能,还是从固化体的微观表征及固化反应的机制分析,用地聚合物固化Pb2+比用水泥固化更具优势.

关键词：地聚合物 Pb2+ 固化效果结构固化机制

在线全文

学校读者我要写书评

暂无评论

中国独立炼厂绿色发展的战略思考

现代化工 2017年第10期37卷 1-5页

作者：宫雨秦曼曼孙仁金中国石油大学(北京)工商管理学院北京102249

独立炼厂填补了国有炼厂油品供给的区域空缺,对我国社会经济发展及人们日常生活都有重要的意义。但独立炼厂经济发展与社会环境效益的冲突加剧,炼厂发展增加了我国环境保护的压力。研究分析独立炼厂发展面临的内外部问题,提出了加快运... 详细信息

独立炼厂填补了国有炼厂油品供给的区域空缺,对我国社会经济发展及人们日常生活都有重要的意义。但独立炼厂经济发展与社会环境效益的冲突加剧,炼厂发展增加了我国环境保护的压力。研究分析独立炼厂发展面临的内外部问题,提出了加快运输管道建设、拓宽下游销售渠道、提高工艺技术水平、优化装置结构等建议,为我国独立炼厂绿色发展提供参考。

关键词：独立炼厂绿色发展环保战略思考

SELF-PROPAGATING HIGH-TEMPERATURE REDUCTIVE SYNTHESIS OF TiB_2 CERAMIC POWDER

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 1995年第2期10卷 34-39页

作者：王为民徐曼金明姬 Wuhan Univ of Technology Wuhan China

SHS method with reductive process was used to synthesize TiB2 ceramic powder from B2O3-TiO2-Mg system. X-ray diffraction, SEM and Image analysis were used to analyse microstructure of TiB2 powder and compare with microstructure of TiB, fabricated by SHS elements syn-thesis from Ti+B system. The results show that TiB? powder fabricated by SHS reductive synthesis is finer (about 1. 5?m) ,uni former and free-agglomerate.

关键词： SHS with reductive process TiB2 ce-ramic poivder B2O3+TiO2+Mg system microstnicture

在线全文

学校读者我要写书评

暂无评论

精馏过程单变量扰动原因的智能反演

高校化学工程学报 2016年第6期30卷 1300-1305页

作者：梁慧婷田文德靳满满项曙光青岛科技大学化工学院山东青岛266042

由于精馏过程存在大量扰动,使得扰动原因难以确定,扰动量信息诊断精度难以提高,本文对精馏过程扰动问题进行了研究。以精馏塔回流量(L)、上升蒸汽量(V)、进料组成(zF)及进料量(F)扰动为例,在单变量扰动的基础上,将物理领域的反演思想应... 详细信息

由于精馏过程存在大量扰动,使得扰动原因难以确定,扰动量信息诊断精度难以提高,本文对精馏过程扰动问题进行了研究。以精馏塔回流量(L)、上升蒸汽量(V)、进料组成(zF)及进料量(F)扰动为例,在单变量扰动的基础上,将物理领域的反演思想应用于精馏故障诊断,结合精馏过程内嵌机理,建立了各扰动量与欧氏距离之间的反演模型,经过运算实现扰动量的定量分析。并将此方法录入规则,以便嵌入专家系统,实现智能辨识扰动原因。本文将此方法运用到高纯度的二元精馏塔中,实现了单变量扰动原因的定量辨识,证明了该方法的有效性。

关键词：精馏单变量扰动反演智能辨识

Decursin Safety from Root of Angelica gigas in Rats

在线全文

学校读者我要写书评

暂无评论

Journal of Northeast Agricultural University(English Edition) 2013年第4期20卷 46-51,F0003页

作者： Jiang Cheng-zhe Feng jin-man Zhang Jian-feng Han IIhyun Choung Seyoung Department of Veterinary Medicine College of Agriculture Yanbian University Key Laboratory of Natural Resource of the Changbai Mountain and Functional Molecular (Yanbian University) Ministry of Education College of Pharmacy Kyung Hee University

The subacute intraperitoneal toxicity of decursin was investigated in Spargue-Dawly（SD） rats. The rats were treated with decursin at a dose of 125 and 250 mg·kg-1·day-1for 4 weeks. All animals were observed daily for clinical signs. Their body weights were recorded weekly, no mortality was observed in two doses of 125 and 250 mg·kg-1of decursin. There were no significant differences in the clinical observations, body weight, food and water consumption, hematology, blood chemistry, gross pathological examination or organ weight between control and treated animals of both sexes. In conclusion, no evidence of a subacute toxic potential was observed in this study and no indication for adverse effects was noted at a dose level of 250 mg·kg-1·day-1.

关键词： Angelica gigas decursin subacute toxicity rat

在线全文

学校读者我要写书评

暂无评论

癫癎患儿遵医行为对疗效的影响

实用儿科临床杂志 2005年第8期20卷 792-792,796页

作者：靳曼丽商丘市第一人民医院儿科河南商丘476100

目的探讨遵医行为对癫癎患儿治疗效果的影响。方法选择39例癫癎患儿,将是否发作作为应变量,选取遵医行为、年龄、性别、病程等作为自变量,采用χ2检验进行单因素分析,对经单因素分析有显著意义的自变量,行多因素Logistic回归分析。结果... 详细信息

目的探讨遵医行为对癫癎患儿治疗效果的影响。方法选择39例癫癎患儿,将是否发作作为应变量,选取遵医行为、年龄、性别、病程等作为自变量,采用χ2检验进行单因素分析,对经单因素分析有显著意义的自变量,行多因素Logistic回归分析。结果遵医依从性、发病诱因、病程、既往史、性别等5个因素与癫癎多次发作有显著相关性(P0.05)。结论遵从医嘱是合理治疗癫癎、预防再发作及减轻不良反应的关键因素。

关键词：癫痢遵医行为儿童预后