几种吸附式致冷新工质对的性能预测

应用吸附平衡基本理论对几种可能的吸附式致冷新工质对的性能进行了预测。结果表明，烷烃系列的低混点工质与沸石的配对体系是不可取的，而沸石－氨、活性炭－丙酮、活性炭－氨及活性炭－乙醇则是沸石－水、活性炭－甲醇体系的适宜的替代物。     

Identifying a putative common binding site shared by substance P receptor and an anti-substance P monoclonal antibody

Substance P G-protein coupled receptor and the antigen recognitionsite of a monoclonal antibody raised against substance P sharea stretch of five contiguous identical amino acids. This observationprompted us to build an atomic model of both the receptor andthe antibody and to analyse their common features. In particular,we report here that a pocket of similar size and compositionis present in both proteins, strongly suggesting a similarityin the mode of binding of both macromolecules to substance P.From the analysis of our models, the available data on the modeof binding of the antibody to substance P and recent data onsubstance P receptor mutants, we concluded that the pocket isvery likely to be involved in binding of the C-terminal 'messagesequence' of the tachykinin. This allowed us to suggest specificsite-directed mutants of the receptor which should shed somelight on the mechanism of peptide recognition by G-protein coupledreceptors.     

THz-TDS signal analysis and substance identification via the conformal split

A terahertz time-domain spectroscopy(THz-TDS)imaging system can obtain high-dimensional signals with substance fingerprint information.By introducing geometric algebra,a novel signal analysis approach to THz-TDS signals is developed based on an optical physical mechanism.Using this approach,signals are represented with vectors in the high-dimensional real vector space.Geometric distribution properties and algebraic relationships of THz-TDS signals are deduced.It is proved that every complex refractive index of substances relates to a unique 2-blade,the vectors corresponding to the samples of the same substance are collinear and belong to the intrinsic 2-blade of the substance.When decomposed through the conformal split with respect to a 2-blade,THz-TDS signals of high dimensionality can be related to vectors in a 2-dimensional subspace.Based on the conformal split properties we deduced,two criteria for substance identification on the basis of THz-TDS signals are proposed.Accordingly,a novel substance identification method via the conformal split is presented.In the method,the 2-blade related to each "known" substance is calculated with two vectors corresponding to THz-TDS signals measured from samples of the substance but with dierent thicknesses.Using the conformal split with respect to those 2-blades,an identified vector corresponding to a THz-TDS signal is linearly related to the vector in a 2-dimensional subspace.The substance of a sample can be identified using criteria on the projected vectors in the subspaces.This method can contribute to accurate classification and identification.Finally,two experiments are presented that show the feasibility and accuracy of this method.     

Poly(chitosan-ester-ether-urethane) Hydrogels as Highly Controlled Genistein Release Systems

Polymeric hydrogels play an increasingly important role in medicine, pharmacy and cosmetology. They appear to be one of the most promising groups of biomaterials due to their favorable physicochemical properties and biocompatibility. The objective of the presented study was to synthesize new poly(chitosan-ester-ether-urethane) hydrogels and to study the kinetic release of genistein (GEN) from these biomaterials. In view of the above, six non-toxic hydrogels were synthesized via the Ring-Opening Polymerization (ROP) and polyaddition processes. The poly(ester-ether) components of the hydrogels have been produced in the presence of the enzyme as a biocatalyst. In some cases, the in vitro release rate of GEN from the obtained hydrogels was characterized by near-zero-order kinetics, without “burst release” and with non-Fickian transport. It is important to note that developed hydrogels have been shown to possess the desired safety profile due to lack of cytotoxicity to skin cells (keratinocytes and fibroblasts). Taking into account the non-toxicity of hydrogels and the relatively highly controlled release profile of GEN, these results may provide fresh insight into polymeric hydrogels as an effective dermatological and/or cosmetological tool.     

氢氧化镁和氧化镁中酸不溶物的研究

产硝后的高镁卤水和硫氢化钡溶液进行反应，生成氢氧化镁，酸不溶物在0．3％（质量分数）左右，但将其煅烧成氧化镁后，酸不溶物高达1．2％-2．5％（质量分数），二者酸不溶物远不成比例关系。通过对样品在分析中穿滤对比、硫酸法测定酸不溶物、碘量法测定硫化物试验，确定在生产过程中，硫氢化钡被氢氧化镁吸附，经过高温煅烧，硫氢化钡被氧化成硫酸钡，成为氧化镁中的酸不溶物，这就是氧化镁和氢氧化镁中酸不溶物不成比例的主要原因。     

Responses by amphisbaenianBlanus cinereus to chemicals from prey or potentially harmful ant species

We tested the ability of amphisbaenians (Blanus cinereus) to discriminate between odors of ant species selected as prey (Pheidole pallidula) and odors of potentially harmful ant species (Messor barbarus) that are avoided. Tongue-flick rate to swabs impregnated with ant odors, cologne, or deionized water differed among treatments, showing that amphisbaenians were able to discriminate ant species odors. Amphisbaenians showed an aggressive response and bit applicators bearing the odor of harmful ants, while the odor of prey ants did not elicit bites to swabs. The possible evolutionary advantage of identifying and avoiding harmful ants is discussed in relation to the fossoriality of amphisbaenians.     

钙质微波炉用耐热陶瓷釉的研究

以CaO -Al2 O3-SiO2 三元系统组成为基础研制了一种适合耐热微波炉用的平滑光亮陶瓷釉 ,该釉的坯釉结合性、热稳定性及釉面质量均符合微波炉用耐热陶瓷的要求 ,釉α80 0℃ =6 .0 1× 10 - 6 ℃ - 1 ;热稳定性可达 36 0℃～ 2 0℃热交换一次不裂 ;该种钙质耐热釉加入过多碳酸锂 ,会使坯釉结合性变差。     

一株铜绿微囊藻溶藻菌的溶藻机理研究

以铜绿微囊藻为溶解对象,从巢湖中分离到1株溶藻菌H2。探讨了菌株H2对铜绿微囊藻的溶藻方式,菌株H2胞外活性物质的溶藻特性。结果表明,菌株H2是间接溶藻。溶藻菌起溶藻作用的胞外分泌液中活性物质主要为分子量小于3.5k D的物质,并且活性物质是混合物质;菌株胞外分泌液经乙醇沉淀后,上清液部分的溶藻率大于沉淀部分,为52.50%;胞外分泌液经不同温度和酸碱度处理后,在25℃、p H=12.0时,活性较强,溶藻率分别为98.0%和97.1%;胞外分泌液中活性物质具有一定的抗氧化性。     

中国古代几种含氮物质的热处理渗入效果初探

根据文献记载，我国古代有采用含氮物质进行热处理事实，分析了古代渗氮处理的可能性和前提条件，具体实践了几种文献记载含氮物质的渗氮处理。试验结果表明，Lu硝容易升华，基本没有渗氮效果，但可能起到一定催渗作用；硝单独使用渗氮效果也不明显；牛角灰、毛发灰、箬皮灰都有明显的渗氮作用；加硝有促进作用，硝与毛发灰共同作用有显著渗氮效果，并获得了较好的含氮化合物渗层。     

高韧性合成球墨铸铁的生产

为满足Mn、Ti、S、P及微量元素含量都很低的要求，采用由大量（70％～80％）废钢，少量（0％～10％）新生铁和增碳剂组成的炉料，用感应炉熔炼，生产高韧性合成球铁。与生铁加入量大的球铁相比，合成球铁的力学性能较好，质量稳定，而且成本较低。