HT-730改性酚醛-丁腈胶粘剂的研制

对酚醛-丁腈胶粘剂进行改性，添加5．0％的硅烷偶联剂，改善了酚醛-丁腈胶粘剂的工艺性能，提高了粘接强度，特别是降低了酚醛-丁腈胶对环境湿度的敏感性。研制的HT-730胶在环境湿度90％时仍有很高的粘接强度，同时老化性能和适用期并没有受到影响。     

活性污泥法处理污水两个重要参数的理论探讨

负荷、泥龄是活性污泥法处理城市污水设计、运行中的重要参数.给出了有机负荷的动力学表达形式(称之为动力学负荷),并对有机负荷和泥龄的关系,有机负荷和泥龄对水质、污泥沉降性能影响进行了理论探讨.     

2-硝基-4''''-氨基二苯胺-4-磺酸的工艺改进

将3-硝基-4-氯苯磺酸与对苯二胺进行缩合反应制得2-硝基-4’-氨基二苯胺-4-磺酸。传统的合成工艺：缩合反应的收率只有83％，主含量86.4％，必须精制后才能使用。本实验对缩合工艺的反应条件如温度，缚酸剂，抑制剂以及加料方式等进行了较为详细的探讨，通过正交实验，选择了最佳缩合反应条件，m（硝化物）：m（对苯二胺）=1.10：1，分次加料，分段保温，获得纯度94.7％的产品。收率提高了8％-10％，减少了废物的排放量，并省去精制步骤。     

运动发酵单胞原生质球的形成和再生

运动发酵单胞(Zymomonas mobilis)ATCC29191菌株在含1～3g/L甘氨酸的液体培育12小时的菌体,用含20g/L的溶菌酶溶液处理12小时,可以稳定得到80％～90％的原生质球。原生质球稀释后在底层再生培养基上涂布,上面复盖一层半固体培养基,30℃培养5～7小时,再生率可达10~(-2)水平。     

脂肪酸系列表面活性剂的研究进展

概括和综述了4大类10余个脂肪酸系列表面活性剂的合成、性能和应用现状，重点评述了烷醇酰胺及其衍生物、乙氧基化脂肪酸甲酯、脂肪酸甲酯磺酸盐、N-酰基ED3A、氨基酸、咪唑啉、甜菜碱、双子表面活性剂等脂肪酸系列表面活性剂的研究进展。此系列表面活性剂易生物降解、安全、多功能和高效能。     

浅论食品添加剂的安全性

介绍了食品添加剂的定义、分类和作用 ,分析了国内外食品添加剂的现状、发展前景及存在的问题 ,综述了食品添加剂的安全性问题及监督管理办法。     

Study of different effect on foaming process of biodegradable bionolle in supercritical carbon dioxide

Microcellular foaming of biodegradable Bionolle in supercritical CO₂ has been produced. The effects of a series of variable factors, such as saturation temperature, saturation pressure, and depressurization time and step on the foam structures and density, were studied through measurement of density and SEM observation. The experimental results show that higher saturation temperatures lead to an increase in bulk densities; and different depressurization time and step result in different product cell morphology. In addition, at some saturation temperature, the orientation of the cells can be found in the product morphology. XRD experimental results show that the foaming treatment with SC CO₂ increased the crystallinity of Bionolle. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 2901–2906, 2006     

民法法典化视野下的社员权

社员权问题学界少有论及,在目前民法法典化这个大背景之下研究社员权有着其独特的价值。社员权产生于日耳曼法,正式确立于近代。所谓社员权,系指社员基于其社员身份而对社团和其他社员所享有的权利。作为基本私权利的一个种类,社员权在未来民法典中应当占有一席之地。未来民法典中的社员权法应当包括社员权法通则、建筑物区分所有人的社员权、集体经济组织成员的社员权以及合作社成员的社员权共四部分。     

Analysis of junction temperatures in high-power GaN-based LEDs

We presented the analysis of the incomplete conduction in bonding medium in high power GaN-based light-emitting diode (LED) packages. A numerical study was carried out with parametric model to understand the junction temperature variation due to bonding medium defects. Transient thermal measurement was performed to evaluate LED’s junction temperature. Thermal resistance from chip to lead frame was 20 K/W in our sample LED. It was suggested that only 60% of the surface area of the bonding medium was involved...     

Dynamic equivalent method of interconnected power systems with consideration of motor loads

The existing equivalent methods usually only deal with static load models and neglect the dynamic characteristics of loads such as induction motors.This paper presents a dynamic equivalent method which considers motor dynamics.At first,the clustering criterion of motor loads is given.The motors with similar dynamic characteristics are classified into one group.Then,reduction of motors in the same group is carried out.Finally,parameters of the equivalent motor are calculated and the equivalent system is thus...