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标准号: NF P52-307-2-2006

摘要： Le présent document vise les installations de chauffage par le sol en dalles autres que celles traitées dans la norme NF DTU 65.14 *** planchers chauffants en dalle désolidarisée isolée font l'objet de la norme NF DTU 65.14 P1 et ne sont pas visés par ce *** les installations de chauffage par le sol, à eau dont la température ne dépasse pas 50 oC, le présent document donne : les qualités des matériaux destinés à la réalisation de plancher chauffant à eau chaude avec tubes en matériau de synthèse ou en cuivre ; les règles d'exécution, d'essai, de réception et de mise en *** document ne traite pas du calcul des installations, ni du calcul des *** présent document est applicable à tous les bâtiments, y compris les locaux à très fortes sollicitations (P4S), quelle que soit leur *** présent document ne vise pas les planchers réversibles.

关键词： cell culture   extracellular matrix (ECM)   plasma polymerization   poly(N-isopropyl acrylamide) (pNIPAM)   secondary ion mass spectrometry (SIMS)  

摘要： Previously, we compared the release of cell sheets via low-temperature liftoff from ppNIPAM treated surfaces to cell removal by enzymatic digestion and mechanical dissociation. We made two interesting observations, namely: 1) mechanical dissociation of cells from surfaces leaves behind a surface that promotes new cell growth, and 2) that ToF-SIMS data from post-mechanical dissociation surfaces differed from the other surfaces primarily due to the presence of hydrocarbon species and a fragment at m/z = 86 which could be attributed to either amino acids (leucine/isoleucine) or lipid molecules. In this study, we examine in detail the effect that mechanical dissociation has on cell removal. Using PCA of the ToF-SIMS data, we observe a clear separation of the post-mechanical dissociation surfaces from controls. We find that post-mechanical dissociation surfaces are primarily characterized by the presence of high mass fragments (indicative of lipid molecules), and the absence of certain low mass fragments indicative of protein. These findings support the hypothesis that the process of mechanical disruption ruptures cell walls, leaving lipid molecules from the cell membrane on the surface.

关键词： Technical Writing   Civil Engineering   Feedback (Response)   Grading   Student Evaluation   Best Practices   Engineering Education   Writing Instruction   Content Area Writing   Teaching Methods   College Instruction   College Faculty   Teacher Attitudes  

摘要： Previous research has indicated that engineering faculty do not follow best practices when commenting on students' technical writing. However, it is unclear whether the faculty prefer to comment in these ineffective ways, or whether they prefer more effective practices but simply do not enact them. This study adapts a well known study of response in composition to ask whether engineering faculty prefer authoritative, form-focused comments, or whether they may prefer to write different sorts of comments. We asked ten civil engineering faculty to comment on a sample paper and then rank their preferences for provided versions of comments on the same paper. One provided version emphasized comments on content, one emphasized comments on form, and one was balanced. Comparisons of the respondents' preferences and practices suggest that the engineering faculty recognize and value content-focused, non-authoritative responses, but generally do not write comments that conform to these values. We consider the implication of these findings for research on response to technical writing as well as for technical writing faculty in their own course. While recognizing the need for more research, we also discuss ways in which writing professionals, including WAC administrators and technical writing professors, can encourage engineering faculty to enact their preferences for response styles that reflect best practices.

关键词： 水利工程   管理体制   改革   黄河  

摘要： 水利部黄河水利委员会的工作实践表明,将计划经济体制下“修、防、管、营”四位一体的黄河水利工程管理模式转变为适应市场经济需要,管理与养护分开,将使水管单位作为工程管理的责任主体地位更加明确,维修养护工作的专业化水平提高。

关键词： 集团公司   职能机构   化学工程   社会   分离   中国   中小学校   省人民政府   工程公司   国务院  

摘要： 日前，中国化学工程集团公司与安徽省人民政府签定的关于东华工程公司所属小学移交协议得到国务院国资委、财政部的联合批复，至此，所涉及到集团公司所属分布在8个省、11个地市11家企业的14所中小学及其人员、资产全部移交，集团公司分离办社会职能机构（企业自办中小学校）工作已全面完成。

关键词： 分离工程   再生铅   综合利用工程   土建项目   股份有限公司   金   技改工程   河南省  

摘要： 河南豫光金铅股份有限公司10万t再生铅综合利用工程10万t／a再生铅分离工程土建项目于日前正式开工。 10万t再生铅综合利用工程总投资2．6亿元，是河南省重点工程，共有3个子项目，其他两个子项目8万t粗沿技改工程、8万t再生沿精炼工程已分别于2005年3月、9月投产。

关键词： boundary layer   microfluidics   microfabrication   press-fit device   protein separations  

摘要： The preparation of surfaces in microfluidic devices that selectively retain proteins may be difficult to implement due to the incompatibility of derivatization methods with microdevice fabrication techniques. This review describes recently reported developments in simple and rapid methods for engineering the surface chemistries of microchannels based on construction of press-fit microdevices. These devices are fabricated by placing a glass fiber on a PDMS film and pressing the film on a silicon wafer or a microscope slide that has been derivatized with octadecyltrichlorosilane (ODS). The film adheres to the slide and forms an elliptically shaped channel around the fiber. The combination of surface wettability of a hydrophilic glass microfiber and the surrounding hydrophobic microchannel surfaces directs a narrow boundary layer of liquid next to the fiber in order to bring the sample in contact with the separation media and results in selective retention of proteins. This phenomenon may be exploited to enable microscale separation applications since there are a wide variety of fibers available with different chemistries. These may be used to rapidly fabricate microchannels that serve as stationary phases for separation at a microscale. The fundamental properties of such devices are discussed.

关键词： 组织工程   皮肤   表皮干细胞   快速分离  

摘要： 目的寻找一种快速可行的同期分离组织工程皮肤种子细胞——表皮细胞及成纤维细胞的方法。方法取手术切除包皮,利用型胶原酶结合胰蛋白酶消化法,同期分离表皮细胞及成纤维细胞,观察细胞形态。对表皮细胞及表皮干细胞行PAN-FITC、K19-FITC荧光免疫染色及K19流式细胞仪鉴定;对成纤维细胞行波形蛋白FITC免疫荧光鉴定。并分别对两种细胞培养7d,观察其生长情况。结果应用型胶原酶结合胰蛋白酶,在3h内快速分离得到表皮细胞及成纤维细胞,免疫荧光染色表皮细胞PAN-FITC染色均为阳性、K19-FITC染色部分阳性,流式细胞仪鉴定其K19阳性表达的细胞接近17%。表皮细胞培养48h开始呈克隆样增长,至7d生长停滞,向终末的角细胞分化。成纤维细胞体外培养7d可扩增100倍,波形蛋白FITC免疫荧光染色呈阳性。结论利用胶原酶结合胰蛋白酶消化法可在3h内同期分离到用于构建复合型组织工程皮肤的种子细胞,为复合组织工程皮肤的快速构建提供了可能。

关键词： 产业化示范工程   技术突破   分离工艺   稀土矿   萃取   铈   钍   技术途径  

关键词： 石化建筑企业   主辅分离   改制分流   市场竞争力  

摘要： 本文通过分析北京燕化建安公司的现状，借鉴相关企业改制分流的成功经验，应用产权理论、公司治理理论及股权激励理论，对国有大中型企业改制分流进行研究，提出了北京燕化建安公司的具体目标、改制分流的基本模式和基本做法，制定了改制分流的具体方案。\n 北京燕化建筑安装工程公司是以石油化工工程建设为主，兼营化工设备设计、制造及装置检维修的国家一级资质施工企业，是我国资历最老的大型施工企业之一。另一方面，和其他大型企业一样，北京燕化建安公司依然保留着庞大的组织机构，公司目前历史负担沉重，财务状况恶劣，经营困难。实行产权制度改革，有利于转换经营机制，轻装上阵，提高企业活力，增强市场竞争力，使企业得以生存和发展。