三层复合PVC-U静音排水管

介绍了重庆顾地塑胶电器有限公司开发的三层复合PVC-U静音排水管,内、外皮层由PVC树脂、冲击改性剂、加工改性剂、稳定剂、润滑剂、填料和颜料组成,吸音芯层由PVC树脂、加工改性剂、稳定剂、润滑剂、颜料、弹性体吸音材料和固体吸音材料组成。该PVC-U静音排水管可使排水噪声下降14~18 dB,比普通PVC-U排水管的排水噪声低3~8 dB,比普通铸铁排水管排水噪声还要低。     

羧甲基淀粉用作型煤粘结剂的研究

研究了羧甲基淀粉的合成方法及其对粉煤成型的粘结性能。结果表明 ,羧甲基淀粉是一种优良的型煤粘结剂 ,其粘结性能显著优于原淀粉及其糊化产物 ,而采用酸前法制备的羧甲基淀粉产品的性能要优于碱前法制备的产品     

高效液相色谱法测定染发剂中对苯二胺及某些酚类物质的含量

本文采用了高效液相色谱法测定染发剂中对苯二胺、邻氨基酚、对苯二酚及间苯二酚。该法简便快速 ,检测下限分别为 0 .0 89、0 .2 5、0 .0 0 19和 0 .0 0 33毫克 /克 ,具有良好的精密度和准确度     

神东煤显微富集物与锯末共液化的初步研究

在450℃下考察了神东煤显微富集物和锯末共液化的规律,结果表明:锯末对神东煤显微富集物转化率的提高无促进作用,相反对沥青烯产率的增加有明显促进作用,对神东煤的富惰质组的促进作用明显优于对富镜质组的促进作用,锯末和神东煤显微富集物的热解特性表明:锯末和显微富集物的热解失重峰没有重合度,这可能是不产生增效作用的原因.     

国外干粉灭火系统引进使用情况调查

介绍了几套从国外引进的干粉灭火系统的组成、主要技术指标、控制方式及使用、运行情况，并就各自特点进行了分析，可供我国消防产品开发、工程设计和管理人员参考借鉴。     

磺化丙酮甲醛缩聚物合成参数对其减水分散性能的影响

研究了磺化丙酮甲醛缩聚物(SAF)的合成工艺条件.结果表明,甲醛用量、磺化剂用量和反应溶液浓度是影响SAF的结构特征参数--分子量和磺化度的主要因素,同时也是影响SAF减水分散性能的主要因素.随着磺化剂用量的增大,SAF的特性黏度和净浆流动度先增大后减小.当n(甲醛):n(内酮)为2.0,n(磺化剂):n(内酮)为0.7,反应液浓度为45%时,掺0.5%SAF的水泥净浆流动度达到280 mm.分子量和磺化度直接影响其减水分散性能,研究表明,适宜的分子量(特性黏度为6～12 ml/g)和较高的磺化度(1.86 ml/g)有利于提高SAF对水泥的分散性能.     

超声电沉积制备纳米金属陶瓷复合镀层工艺

基于超声电沉积复合作用,研究在金属表面获得纳米金属陶瓷复合镀层的基本工艺。通过试验研究了超声波对镀层中纳米陶瓷粒子的含量、分布以及基质金属晶粒的影响,一定条件下镀液中纳米粒子含量与镀层中纳米粒子含量的对应关系。通过超声和电沉积两种技术的有机结合,在常用金属表面获得由尺寸50nm以下的镍晶和纳米SiC粒子构成的纳米级金属陶瓷复合镀县。     

Comparison of Different Mass Spectrometry Workflows for the Proteomic Analysis of Tear Fluid

The tear film is a multi-layer fluid that covers the corneal and conjunctival epithelia of the eye and provides lubrication, nutrients, and protection from the outside environment. Tear fluid contains a high concentration of proteins and has thus been recognized as a potential source of biomarkers for ocular disorders due to its proximity to disease sites on the ocular surface and the non-invasive nature of its collection. This is particularly true in the case of dry eye disease, which directly impacts the tear film and its components. Proteomic analysis of tear fluid is challenging mainly due to the wide dynamic range of proteins and the small sample volumes. However, recent advancements in mass spectrometry have revolutionized the field of proteomics enabling unprecedented depth, speed, and accuracy, even with small sample volumes. In this study using the Orbitrap Fusion Tribrid mass spectrometer, we compared four different mass spectrometry workflows for the proteomic analysis of tear fluid collected via Schirmer strips. We were able to establish a method of in-strip protein digestion that identified >3000 proteins in human tear samples from 11 healthy subjects. Our method offers a significant improvement in the number of proteins identified compared to previously reported methods without pooling samples.     

Molecular Cytogenetic Characterization of Novel 1RS.1BL Translocation and Complex Chromosome Translocation Lines with Stripe Rust Resistance

Rye is the most important source for the genetic improvement of wheat. In this study, two stable wheat-rye primary 1RS.1BL translocation lines, RT855-13 and RT855-14, were selected and identified by acid polyacrylamide gel electrophoresis (A-PAGE), co-dominant PCR, and multi-color fluorescence in situ hybridization (MC-FISH) from the progeny of the crossing of the wheat cultivar Mianyang11 and a Chinese rye Weining. When more than two independent, simple reciprocal translocations are involved in a carrier, they are defined as complex chromosome translocations (CCT). The MC-FISH results also indicated that CCT occurred in RT855-13; namely that, besides 1RS.1BL translocation chromosomes, there are other two pairs of balanced reciprocal translocations. It was demonstrated that the interchange between a distal segment of 4B and long arm of 3D occurred in the RT855-13. The novel translocation chromosomes in wheat were recorded as 3DS.4BS^DS and 3DL-4BS^PS.4BL. Reports about CCT as a genetic resource in plant breeding programs are scarce. Both lines expressed high resistance to Puccinia striiformis f. sp. tritici, which are prevalent in China and are virulent on Yr9, and the CCT line RT855-13 retained better resistance as adult plants compared with RT855-14 in the field. Both lines, especially the CCT line RT855-13, exhibited better agronomic traits than their wheat parent, Mianyang11, indicating that both translocation lines could potentially be used for wheat improvement. The results also indicated that the position effects of CCT can lead to beneficial variations in agronomic and resistant traits, making them a valuable genetic resource to wheat breeding programs.