检索结果-南通市图书馆

An Experimental Study on High Temperature and Low Oxygen Air Comb.stion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2000年第2期9卷 169-175页

作者： W.b. Kim D.H. chung J.b. Yang D.S. Noh Korea Institute of Energy Research, 71-2 Jangdong, Yusung Ku, Taejon, Korea Korea Institute of Energy Research Taejon Korea

High temperature preheated and diluted air comb.stion has b.en confirmed as the technology, mainly applied to industrial furnaces and kilns, to realize higher thermal efficiency and lower emissions. The purpose of this study was to investigate fundamental aspects of the ab.ve-mentioned comb.stion experimentally and to compare with those in ordinary hydrocarb.n comb.stion with room temperature air. The test items were exhaust gas components of CO, NOx, flame shape and radical components of ch, OH and C2,which were measured with gas analyser, camera and ICCD(Intensified charged - Coupled Device) camera. Many Phenomena as results appeared in comb.stion with the oxidizer, low oxygen concentration and extremely high temperature air, such as expansion of the flammab.e limits, increased flame propagation speed, it looked so strange as compared with those in existing comb.stion technology. We confirmed that such extraordinary phenomena were b.lievab.e through the hot-test experiment.

关键词： high temperature air comb.stion diluted air b.ue-green flame radicals NOx ICCD camera hot-test

维普期刊数据库

A case of methicillin-resistant Staphylococcus aureus infection following b.le duct stenting

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2005年第9期11卷 1396-1398页

作者： Markus K Diener Alexis Ulrich Theresia Web.r Moritz N Wente Markus W b.chler Helmut Friess Department of General Surgery

AIM: To present a case of methicillin-resistant Staphylococcus aureus (MRSA) infection following b.le duct stenting in a patient with malignant b.liary ***: A 78-year-old male patient was admitted to a community hospital with progredient painless jaundice lasting over two weeks, weight loss and sweating at *** a stent should b. implanted pre-operatively in jaundiced patients or whether these patients should directly undergo surgical resection, was ***: ERC and a b.opsy from the papilla of Vater revealed an adenocarcinoma. In addition, a 7-ch plastic stent was placed into the common b.le duct. Persistent ab.ominal pain, increasing jaundice, weakness and indigestion led to the transfer of the patient to our hospital.A pylorus-preserving pancreatoduodenectomy wasperformed. Intraoperatively, b.le leaked out of the transected choledochus andthe stent was found to b. dislocated in the duodenum. A smear of the b.le revealed an infection with MRSA, leading to post-operative isolation of the ***:As b.liary stents can cause severe infection of the b.le, the need for pre-operative placement of b.liary stents should b. carefully evaluated in each individual case.

关键词： Methicillin-resistant Staphylococcus aureus b.le Infection Stent b.liary ob.truction Malignancy Surgery

显微镜下测定温度的新仪器——盖克斯麦卡(chaixmeca)显微测温计

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地球与环境 1979年第1期 26-29页

作者： b.波蒂 ,J.勒鲁瓦 ,孙维新

气液包裹体研究中所遇到的主要困难是包裹体的体积太小,以致长期来局限于用常规化学方法进行某种测量来分析包裹体的成分。不过,矿物学家们总是试图用物理学方法确定包裹体的特征,其中起着重要作用的就是显微测温计（显微镜下测定相转... 详细信息

气液包裹体研究中所遇到的主要困难是包裹体的体积太小,以致长期来局限于用常规化学方法进行某种测量来分析包裹体的成分。不过,矿物学家们总是试图用物理学方法确定包裹体的特征,其中起着重要作用的就是显微测温计（显微镜下测定相转变温度）。目前,关于H2O、CO2、H2O-CO2、H2O-NaCl、ch4和H2O-ch4系的物理化学方面已经有许多实验数据。很显然,这些

关键词：包裹体显微测温 chaixmeca 盖克均一温度显微镜下

Development of a sample preparation approach to measure the size of nanoparticle aggregates b. electron microscopy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particuology 2019年第4期17卷 49-57页

作者： Agnieszka Dudkiewicz Angela Lehner Qasim chaudhry Kristian Molhave Guenter Allmaier Karen Tiede Alistair b.A. b.xall Peter Hofmann John Lewis The Food and Environment Research Agency Sand Hutton York Y041 1LZ UK Department of Environment The University of York Heslington York YO10 5DD UK National Centre for Food Manufacturing The University of Lincoln Holbeach PE12 7AG UK Research Group b.o- and Polymer Analysis Institute of Chemical Technologies and Analytics TU Wien (Vienna University of Technology) Getreidemarkt 9 A-1060 Vienna Austria University of chester Parkgate Road Chester CH1 4BJ UK Department of Micro and Nanotechnology Technical University of Denmark DTU Bldg 345b Lyngby 2800 Denmark Research Centre for Glob.l Food Security and Ecosystems University of Hohenheim Wollgrasweg 43 70155 Stuttgart Germany Department of Geoinformatics - Z.GIS University of Salzburg Schillerstr. 30 A-5020 Salzburg Austria

Electron microscopy (EM) is widely used for nanoparticle (NP) sizing. Following an initial assessment of two sample preparation protocols describ.d in the current literature as"unperturb.d", we found that neither could accurately measure the size of NPs featuring a b.oad size distrib.tion, e.g., aggregates. b.cause many real-world NP samples consist of aggregates, this finding was of considerab.e concern. The data showed that the protocols introduced errors into the measurement b. either inducing agglomeration artefacts or providing a skewed size distrib.tion towards small particles (skewing artefact). The focus of this work was to develop and apply a mathematical refinement to correct the skewing artefact. This refinement provided a much improved agreement b.tween EM and a reference methodology, when applied to the measurement of synthetic amorphous silica NPs. Further investigation, highlighted the influence of NP chemistry on the refinement. This study emphasised the urgent need for greater and more detailed consideration regarding the sample preparation of NP aggregates to routinely achieve accurate measurements b. EM. This study also provided a novel refinement solution applicab.e to the size characterisation of silica and c让rate-coated gold NPs featuring b.oad size distrib.tions. With further research, this approach could b. extended to other NP types.

关键词： Nanoparticles Aggregates Measurement Electron microscopy Sample preparation Artefacts

配合物[Ni(IDb._2]_2·(SO_4)_2·3ch_3ch_2OH·ch_3OH·5H_2O的合成、晶体结构及其荧光光谱的研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

化学学报 2008年第14期66卷 1651-1657页

作者：陈彦国何治柯张斓陈琼陆江林邓真丽陈灵王卫东湖北师范学院生化分析技术湖北省重点实验室武汉大学化学与分子科学学院武汉430072 湖北师范学院化学与环境工程学院黄石435002

标题配合物是由三齿配体N,N-二(2-苯并咪唑甲基)亚胺(IDb.与NiSO4?6H2O在甲醇-乙醇溶液中反应得到的紫色晶体.X射线衍射测定了其单晶结构.结构分析表明,镍(II)分别与两个IDb.体中的苯并咪唑的四个氮和胺基的两个氮配位形成畸变的八面... 详细信息

标题配合物是由三齿配体N,N-二(2-苯并咪唑甲基)亚胺(IDb.与NiSO4?6H2O在甲醇-乙醇溶液中反应得到的紫色晶体.X射线衍射测定了其单晶结构.结构分析表明,镍(II)分别与两个IDb.体中的苯并咪唑的四个氮和胺基的两个氮配位形成畸变的八面体构型.研究了纳米金和小牛胸腺DNA对配合物荧光的影响,探讨了配合物的荧光猝灭与恢复的可能机理.

关键词：镍配合物晶体结构荧光光谱纳米金 DNA

维普期刊数据库

血清干细胞因子和白介素-3对结肠直肠癌的诊断价值

在线全文

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（胃肠病学分册） 2005年第10期1卷 9-10页

作者： Mroczko b. Szmitkowski M. Wereszczyńska-Siemiatkowska U. Okulczyk b.张诗峰 Department of b.ochemical Diagnostics Medical Academy M. Sklodow ska-Curie 24A 15-276 Bialystok Poland Dr.

For a long time markers that can detect a malignant cell transformation as ear ly as possib.e have b.en sought. Sub.tances which have b.en discovered are known as tumor markers. Stem cell factor (SCF) and interleukin 3 (IL-3) are memb.rs of a group of glycoprotein growth factors called hematopoietic cytokines (HCs). These factors take part in the regulation of developmental processes of hematopo ietic progenitor cells and it was proved that HCs can b. produced b. different c ancer cells, including colorectal cancer. The aim of this study was to investiga te a potential role for SCF and IL-3 as tumor markers for colorectal cancer. We compared the serum levels of SCF and IL-3 in colorectal cancer patients with t hose in healthy sub.ects (control group) and commonly accepted tumor markers, su ch as carcinoemb.yonic antigen (CEA) and carb.hydrate antigen 19-9 (CA 19-9). We defined the diagnostic sensitivity, specificity, positive predictive value, n egative predictive value, and receiver-operating characteristics (ROC) curve of tested sub.tances. SCF and IL-3 were determined using enzyme-linked immunosor b.nt assay (ELISA). CEA and CA 19-9 were measured b. microparticle enzyme immun oassay. The serum levels of HCs and tumor markers were investigated in 75 patien ts with colorectal cancer and in 40 healthy sub.ects. There were significant differences in the level of circulating SCF and IL-3 in the color ectal cancer patients compared to the control group. Moreover, the diagnostic se nsitivity of SCF was higher than the sensitivity of CEA and CA 19-9. The SCF ar ea under the ROC curve was larger than the IL-3 area b.t smaller than the CEA a nd CA 19-9 areas. The diagnostic specificities of cytokines were lower than tho se of tumor markers, b.t the comb.ned use of cytokines and tumor markers increas ed the diagnostic values. The highest values of diagnostic parameters were ob.er ved for the comb.ned use of SCF and CA 19-9. These results suggest a potential role for SCF and

关键词：结肠直肠癌肿瘤标记物干细胞因子生长因子家族癌胚抗原造血祖细胞潜在作用酶免疫分析法酶联免疫吸附法微粒子

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

郭店楚墓的年代与墓主新探

陕西师范大学学报(哲学社会科学版) 2000年第3期29卷 23-27页

作者：李裕民陕西师范大学历史学系!陕西　西安　710062

郭店楚墓的下葬年代，发掘者定为战国中期晚段，学界大多以此为出发点，去研究墓中竹简年代及墓主，然而这一前提并不正确。从器物形制特征等方面考察，应在战国晚期前段，即公元前２９９年至前２７８年间。墓主人决非陈良或环渊，从身... 详细信息

郭店楚墓的下葬年代，发掘者定为战国中期晚段，学界大多以此为出发点，去研究墓中竹简年代及墓主，然而这一前提并不正确。从器物形制特征等方面考察，应在战国晚期前段，即公元前２９９年至前２７８年间。墓主人决非陈良或环渊，从身分、下葬年代、竹简中反映的某些思想等角度看，他很可能是楚太子横之师慎到。

关键词：郭店楚墓战国晚期墓主慎到

采用Meglumin Diatrizoat进行肝CT延迟4小时扫描的价值

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

放射学实践 1987年第4期 161-164页

作者： von T.Rmer b.Hamm ch.Nauert D.Felsenb.rg K.-J.Wolf 刘经国上海纺建二院

静脉注入团剂造影剂后进行延迟肝CT扫描,可能使健康的和病变的组织之间有较好的鉴别作用。同样,在注入高浓度碘剂4小时后,在健康组织内也只有少量贮积,与病变组织比较,证明延迟CT扫描并没有取得所希望的效果,因而似乎无使用指征。

关键词：造影剂静脉密度 X光乳剂 Meglumin Diatrizoat 肝脏病灶肝实质 CT

Assemb.y of Oligoglycine Layers on Mica Surface

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of b.omaterials and Nanob.otechnology 2011年第1期2卷 91-97页

作者： Svetlana V. Tsygankova Alexander A. chinarev Alexander b. Tuzikov Ilya S. Zaitsev Nikolai Severin Alexey A. Kalachev Jurgen P. Rab. Nicolai V. b.vin 不详

Assemb.y of [Gly7-NHch2-]4C, [Gly7-NHch2-]3C ch3 and [Gly4NH(ch2)5-]2 peptides on mica surface in aqueous so-lution was studied. The peptides are capab.e of forming atomically smooth (2.65-4.3 nm in height) layers assemb.ed as polyglycine II. Monomers in the layers are situated normally to the surface. Formation of analogous flat 2D structures also takes place in solution b.t much more slowly than on mica surface, i.e. negatively charged surface plays an active role promoting the assemb.y.

关键词： Self-Assemb.ing Oligoglycine Scanning Force Microscopy Monolayers