纺织工程专业纺织加工化学教学的探索

随着纺织业的发展,,纺织工程专业日益受到人们的重视。纺织加工化学课程成为纺织工程专业的基础必修课程,它将化学知识与现代纺织技术紧密结合。文章从纺织加工化学课程特点及存在的问题出发,结合教学经验和体会,从教学内容、教学方法、实验教学讲解了提高教学效果和提高学生学习兴趣的方法和策略,为以后的纺织加工化学教学提供一定的依据。     

Textile Softeners–Properties,Chemistry, Application and Testing

Meetings of the Midlands Region, held at the Post House, Sandiacre, on 14 January 1973, Mr H. W. Partridge in the chair, and of the Manchester Junior Section, held at Salford College of Technology, on 1 March 1973, Mr R. I. Charlesworth in the chair. The properties of softeners are discussed briefly in relation to their uses: lubrication; anti–crease properties; antistatic properties; water absorbency; extensibility and recovery; stitchability; pilling and snagging; soiling; heat stability; effect of dyes; dyebath stability; durability. The chemistry of softeners is then considered, particularly from the point of view of effect of dyes used for the fibres dealt with. Methods of application of softeners are then briefly reviewed. Finally, the testing of these auxiliaries is discussed.     

浅谈纺织工程专业有机化学教学

随着纺织业的发展,近年来,纺织工程专业日益收到人们的重视,有机化学是纺织工程专业必修的基础课,文章从纺织工程专业有机化学教学中存在的问题出发,结合教学经验和体会,从提高教学效率、提高学生学习兴趣、实验技能和课程体系等方面,对如何改进有机化学教学方法,提高教学质量,圆满完成教学目标进行了探讨。     

DCS、FCS控制系统在锅炉控制中的应用

目前,我国有中小型锅炉十几万台,在使用中普遍存在调节手段有限、锅炉的产汽能力不能随外界负荷的变化而及时变化的现象.由于炉膛温度偏低,排烟温度较高,风煤比不能及时调整,炉膛换热效率较低,从而降低了锅炉的效率.     

浅论现场总线与以太网技术

1　现场总线技术现场总线技术是 90年代兴起的自动化领域的一项新技术 ,根据国际电工委员会ＩＥＣ115 8的定义 ,现场总线是连接智能现场设备和自动化系统的数字式、双向传输、多分支结构的通信网络。它是用于过程自动化和制造自动化领域的现场仪表或现场设备互连的网络通信技术 ,是计算机技术、网络技术和控制技术相结合而产生的。它将专用微处理器置入传统的测量控制仪表 ,使它们各自都具有了数字计算和通信能力 ,采用可以进行简单连接的通信媒介 (如双绞线 ) ,把多个测量控制仪表连接成的网络系统 ,按照公开、规范的通信协议 ,在位于现场…     

现场总线系统控制网络的检查和调试

从现场总线系统仪表的结构出发,分析了石油化工工程常用的现场总线控制系统在检查和调试的项目和内容上与常规集散控制系统的区别     

Problems and Prospects for the Development of Textile,Light and Chemical Industries for the Production of Textile Fibres

Fibre Chemistry - The objective of the study is to substantiate the problems and prospects for the development of the textile, light and chemical industries of the Russian Federation for the...     

Biopolymers: Origin,Chemistry and Biology

Abstract

A brief statement concerning the way in which biopolymers may have originated in the nonbiological world is made, including experimental evidence. This also includes a discussion of such matters as the way in which the code might have originated, that is, the relationship between polypeptides and polynucleotides as well as the secondary and tertiary structure resulting from the primary structure determination. The importance of the interaction of biopolymers with lipids for the formation of limiting membranes is discussed, leading to the formation of cells and other self-organizing cellular type organelles. Thus, the second critical physical-chemical problem for cellular organization, namely, the biopolymer-lipid interaction, is now coming under scrutiny, both in terms of synthetic systems as well as natural ones.     

Ubiquitin binds to a short peptide segment of hydrolase UCH-L3: a study by FCS, RIfS, ITC and NMR

Screening for small peptidic affinity tags for the detection of ubiquitin and ubiquitinated proteins yielded the dodecapeptide amide DPDELRFNAIAL-NH(2) as a specific ubiquitin-interacting ligand. A peptide collection--based on crystal structures with ubiquitin-interacting proteins--was designed and confirmed by sequence comparison of ubiquitin-interacting motifs. Four independent physical detection methods demonstrated that the peptide binds to monomeric ubiquitin with an affinity of about 10 muM and with fast on and off rates. Fluorescence correlation spectroscopy with fluorescent peptides showed specific interaction with ubiquitin. Reflectometric interference spectroscopy with surface-immobilized peptides and isothermal calorimetry measurements confirmed the specific binding of ubiquitin and fast rate constants. (1)H,(15)N heteronuclear NMR localised the interaction site across the beta sheet of ubiquitin. The peptide aligns well with the ubiquitin-interacting motif and represents a lead structure for the rational design of high-affinity tags for targeting ubiquitinated protein in vitro and in vivo.     

Enabling Technologies in Carbohydrate Chemistry: Automated Glycan Assembly,Flow Chemistry and Data Science

The synthesis of defined oligosaccharides is a complex task. Several enabling technologies have been introduced in the last two decades to facilitate synthetic access to these valuable biomolecules. In this concept, we describe the technological solutions that have advanced glycochemistry using automated glycan assembly, flow chemistry and data science as examples. We highlight how the synergies between these different technologies can further advance the field, with progress toward the realization of a self-driving lab for glycan synthesis.     

Research in the Laboratory of Supramolecular Chemistry: functional nanostructures, sensors, and catalysts

This article summarizes research activities in the Laboratory of Supramolecular Chemistry (LCS) at the EPFL. Three topics will be discussed: a) the construction of functional nanostructures by multicomponent self-assembly processes, b) the development of chemosensors using specific receptors or ensembles of crossreactive sensors, and c) the investigation of novel synthetic procedures with organometallic catalysts.     

Structural Chemistry,Fuzzy Logic,and the Law

Chemistry is generally considered to be one of the exact sciences, which implies that much of the thinking and reasoning can be governed by “always” and “never” laws and rules. However, in practice, much of chemistry involves concepts that invoke general rules with the exceptions to those rules arousing curiosity and generating new experiments and theories that facilitate the progress of chemical science. The lack of precision, in fact, requires a mode of thinking and operating that has been called “fuzzy logic”, not necessarily in a pejorative sense, but rather recognizing the fundamental nature of this experimental science and how it plays out in practice. We provide herein some examples of fuzzy logic in the practice of chemistry and demonstrate how these are manifested in the role and behavior of expert witnesses, particularly in pharmaceutical patent litigations that deal with the solid forms of active pharmaceutical ingredients.     

海洋生物粘接的化学原理

1　引言礁岩潮间带遍布全球 ,而日本最为多见。潮间带生长着大量的座生生物。由于海水流速常常超过10ｍ·ｓ- 1,这些座生生物常常受到巨大的侧向和向上拉力 ,所以座生生物在潮间带生存的必要条件是要有强大并且耐环境侵蚀的粘接能力。仔细查看一下潮间带礁岩表面就会发现许多种永久或半永久吸附其上的生物。藤壶、牡蛎、贻贝、笠贝、管栖性多毛纲生物和海带只是其中少数的几个例子。这类生物的粘接方式之所以引起人们的兴趣 ,是因为它们的粘接策略是随机应变 ,在水下它们可以与所遇到的任何类型的硬质表面 ,例如矿物、石蜡、聚丙烯酸酯、聚…