山东省莱阳市三夏期间农作物病虫害发生防治综合预报

三夏期间,农作物病虫害主要有二代粘虫、一代玉米螟、一代小地老虎和黄地老虎、玉米粗缩病、花生蚜虫、二代棉铃虫和花生蛴螬,据植保站用黑光灯、杨树枝把诱集成虫,田间卵量普查,结合莱阳气象局天气预报,预计该期病虫害发生程度指标为2．1607级,累计发生面积为44．8万亩次,现将三夏期间农作物病虫害发生防治情况分析如下：     

4,4′,4″-三氨基三苯胺的合成

本文从对氯硝基苯和对硝基苯胺出发,经过两步反应合成了三偶氮类光导材料的重要中间体4,4′,4″-三氨基三 苯胺,其中第一反应采用KF/季铵盐催化法,收率48.4％,第二步反应采用钯碳催化加氢法,收率91.4％。     

十六烷基三甲基季铵阳离子改良二氧化硅对酸性染料的吸着

The sorption behavior of acid dyes onto cetyltrimethylammonium bromide (CTAB)-modified silica as a function of pH in the aqueous medium was studied. Single-and multi-solute sorption equilibria of orange Ⅱ（OR), phenol red (PR) and Eriochrome Black T (EBT) were studied at pH 3, unbuffered water pH and pH 11. Sorption behavior of EBT could not be conducted at pH3 due to its aggregation in acidic medium. All the reaction conditions, experimental protocols and techniques remained the same throughout the sorption process. Sorption isotherms for single-solute system were fitted by the Langmuir model, while Langmuir competitive model (LCM) and the ideal adsorbed solution theory (IAST) coupled with Langmuir model (IAST/Langmuir) were used for the prediction of multisolute competitive sorption. Sorption affinities influenced by the factors like physical interactive forces between the molecules of CTA on silica and sorbate, structural limitations of the dyes based on their geometrical arrangement were investigated. Sorption affinity of OR was found to be higher than that of EBT and PR at all the pH values investigated. Magnitude of the sorption capacities was observed to be higher in acidic medium but lower in alkaline medium. Trends of the sorption affinities in multisolute system were simlar to those in single-solute system but magnitude of the sorption capacities was significantly reduced due to the prevailing competition among the sorbates.     

曙光院召开第十届学术报告会

日前 ,中橡集团曙光橡胶工业研究设计院第十届学术报告会降下帷幕。此次报告会共收到论文 5 0篇 ,涉及轮胎结构优化、配方研究、工艺改进、设备改造、计算机辅助设计、信息技术应用、质量控制、生产现场管理等内容。其中《ＡＣＡＤ2 0 0 0扩充命令集 曙扩 开发》获得优秀论文一等奖 ;《航空轮胎翻新硫化工艺探讨》、《汽车轮胎胎面胶配方研究》和《ＳＪＱＬ 1 5 0 0Ｉ型激光全息轮胎无损检测仪上位机监控程序ＰＬＣＯＭ的开发》获优秀论文二等奖 ;《提高波音 737 30 0、波音 75 7 2 0 0飞机主轮轮胎起落次数的研究》等 7篇论文获优秀论文三…     

氯代吲哚乙酸的研究进展

氯代吲哚乙酸是一类比吲哚乙酸具有更强生理活性的植物生长调节剂，科学工作者已用各种化学方法合成了多种氯代吲哚乙酸。     

钢－铜－巴氏合金轴承作用简介

通过对轴承合金的温度特性以及如何避免轴瓦局部高温热点现象的发生，提高轴瓦的温度承受能力等问题的探讨，说明三层合金轴瓦在高速重载情况下独特的优越性能。     

粘接低表面能材料的新型胶粘剂研究

详述了用于低表面能材料粘接的新型胶粘剂的制备过程,探讨了低表面能胶粘剂的粘接机理,并讨论了弹性体、三乙基硼烷胺络合物、丙烯酸单体等对低表面能材料胶粘强度的影响.     

高纯级三(羟甲基)氨基甲烷合成和纯化工艺研究

对直接加氢法和两步法合成三 (羟甲基 )氨基甲烷的工艺进行了系统的比较研究 ,通过实验得到优化的工艺条件和催化剂套用方法 ,建立了较合理的纯化方法。     

山东三工设备改造见成效

近来 ,山东三工橡胶有限公司对轮胎生产设备进行了技术改造。硫化车间将四立柱式二层硫化机改成了三层硫化机 ,即现在 3台硫化机的生产能力相当于过去 4台硫化机的生产能力 ,不仅节约了添置设备的资金 ,而且提高了生产车间的空间利用率。为解决帘布贴合机控制转动、压辊下降和压辊上升的脚踏开关并列在一起易误操作的问题 ,将这 3个开关由脚踏式改为手压式 ,并把压辊下降开关改装在帘布贴合机的上部横梁上 ,使这 3个开关的操作更加方便 ,杜绝了误操作问题。为提高硫化质量 ,硫化车间对硫化罐进行了槽沟加宽、加大中心机构活浪鼓内径等改造。…