荧光增白剂溶液的光学特性

荧光增白剂吸收近紫外光,发射可见光,使织物增白.通过对荧光增白剂的溶液进行一系列光学测定与分析.得出:荧光物质本身具有固定的光吸收区和荧光发射区,并有固定的最大激发波长和最大发射波长;一定浓度范围内荧光物质的吸收与浓度成正比关系;荧光量子效率不随激发光波长而变化.     

荧光增白剂溶液浓度核磁共振法检测方法研究

利用核磁共振技术测量了不同浓度荧光增白剂溶液的核磁共振T2谱,建立了T2谱中第一峰的峰点时间、峰高、峰面积等参量与荧光增白剂VBL溶液浓度的关系。研究结果表明:荧光增白剂溶液的浓度与第一峰的峰高、峰面积之间不存在单值对应关系,而与第一峰的峰点时间之间呈现线性关系,即核磁共振T2谱的第一峰点时间可作为核磁共振法检测荧光增白剂溶液浓度的敏感参量,并给出了利用核磁共振法测量荧光增白剂溶液浓度的一种新方法。     

大理市售生活纸制用品中荧光增白剂污染状况检测分析

目的:了解大理市市售纸制用品中荧光增白剂污染的状况,为保护人民的身体健康和纸质用品监督管理提供一定的参考依据。方法:采用荧光分光光度法对荧光增白剂进行测定,用SPSS16.0进行统计分析。结果:不同品质的卷筒纸荧光增白剂的含量不同,各纸制品中荧光增白剂检测结果比较,差异具有统计学意义。纸饭盒经浸泡处理后荧光增白剂的溶出率为82.38%。结论:大理市售的生活纸制用品均检出荧光增白剂,为减少荧光增白剂对居民健康的影响,应加强对生活纸质用品的监督管理。     

造纸用液体荧光增白剂的现状

荧光增白剂对纸张有着明显的增白作用，本文综述了用于造纸行业的液体荧光增白剂的主要品种及作用机理。对其中一些具有代表性品种的制备方法进行了说明，并讨论了荧光增白剂在造纸工业中使用时可能对增白效果影响的因素，并对荧光增白剂的未来研究和生产的发展方向进行了展望。     

洗涤用荧光增白剂发展前景

洗涤剂和肥皂中添加荧光增白剂后，洗涤织物时，对织物有着明显的增白效果。本文综述了用于荧光增白剂在洗涤织物时的增白效果。对其中一些具有代表性品种及制备方法进行了说明，讨论了荧光增白剂在洗涤行业中使用时可能对织物增白效果的影响因素。并展望了洗涤剂中荧光增白剂的发展方向。     

芬兰人的环保生意经 访芬兰环境科技中国项目委员会总裁Mari Pantsar-Kallio女士、副总裁Ari Makkonen先生及在华首席代表杨凤辉先生

《科学》2008年9月19日卷321 no.5896 Bt抗虫棉抑制中国多个农作物地区的棉铃虫转基因棉花已投入生产的杀虫毒素苏云金杆菌(Bt)和抵御虫害棉铃虫(棉铃虫)已被广泛种植在亚洲。从1992至2007年在中国的棉铃虫数量动态分析了,标注的区域爆发这种虫害的多个作物与种植转Bt基因棉花的关系。     

应用LS—50B荧光分光光度计进行洗衣粉增白剂的荧光分析法

本文介绍应用ＬＳ－５０Ｂ荧光分光光度计进行洗衣粉的荧光增白剂的分析方法通过４种增白剂含量不同的标准样品的发射光谱图，作出其发射光谱的峰值和荧光增白剂含量的关系曲线．然后根据各种牌号的洗衣粉的发射光谱的峰值，对照关系曲线，求出其增白剂的含量．     

荧光增白剂的应用及发展趋势

荧光增白剂是一种应用很广的化工原料.本文介绍了荧光增白剂的增白机理及类型,荧光增白剂在造纸、洗涤剂、织物等领域的应用,概述了荧光增白剂的发展趋势.     

洗涤剂用荧光增白剂

概述了洗涤剂用荧光增白剂（ＦＷＡ）的类型及其特性，给出了各大类型的化学结构及合成方法，指出了我国荧光增白剂今后的发展方向．     

转Bt棉不同生长期及不同器官杀虫蛋白表达量的免疫学方法测定

转苏云金杆菌(Bacillus thuringensis)杀虫蛋白基因棉花(下称Bt棉)在不同生长期及不同器官上对棉铃虫杀虫活性存在明显差异。目前国内普遍使用生物测试法检测Bt棉对棉铃虫的杀虫活性,但无法定量检测Bt棉中杀虫蛋白的表达量。本实验室建立的酶联免疫学测定方法(ELISA),可定量检测棉器官内杀虫蛋白的含量。它具有检测周期短,操作简便的优点。用ELISA方法检测Bt棉杀虫蛋白的含量,结果表明,棉叶和花瓣杀虫蛋白含量最高,铃和蕾次之。在棉株生长的后期,各器官杀虫蛋白的含量则有大幅度的下降。     

新疆伊犁地区棉铃虫发生与环境因子的关系及其防治技术的研究

1997－1999年连续3年新疆伊犁地区棉铃虫大发生，对上述棉铃虫大发生年份的环境因子进行了相关分析，并对棉铃虫的防治进行了初步试验研究，结果表明，环境因素对棉铃虫的发生有直接的影响作用。     

新疆北部棉铃虫发生趋势及影响因子分析

针对９０年代以来新疆北部棉区棉铃虫发生有回升的趋势,通过查阅大量区内外文献资料,在对北疆有代表性的棉区,石河子、莫索湾、下野地、玛纳斯、呼图壁、奎屯、车排子等实地调查的基础上,比较了北疆与内地省份近年来的棉铃虫发生情况,并参考８０年代前后棉铃虫的数量动态,较系统地阐述了影响棉铃虫质量、数量动态的生物学、生态学以及人为因子,并提出防治对策。     

菏泽地区第五代棉铃虫研究初报

黄河故道生态区,一般年份棉铃虫发生4个世代,若气温偏高,有第五代或不完整的第五代发生。经调查,摸清了第五代棉铃虫发生规律与为害的特点,为测报和防治提供了科学依据。     

The Recent Advances in Plant Protection Researches of China

There are eight examples briefly given in this paper, namely, (1) Polymyxa graminis and the cereal viruses it transmits; (2) the geographical types and facultative migration of cotton bollworm as well as the safety of Bt transgenic cotton; (3) development of crop near-isogenic lines with resistance to diseases; (4) molecular-biological researches induced resistance of rice by infection of blast fungus;(5) to use cytological and molecular-biological techniques for breeding wheat varieties resistant to barley yellow dwarf virus; (6) mass rearing and field releasing of Microplitis mediator for cotton bollworm control; (7) identification and recombination of insecticidal crystal genes of Bacillus thuringiensis; and (8) interplanting of diverse resistance rice varieties for sustainable control of blast disease; which reflect the general situation of recent advances in plant protection researches of China.     

新疆棉铃虫地理种群差异的酯酶同工酶分析

对新疆不同地区的棉铃虫进行酯酶同工酶电泳，计算出酯酶同工酶的迁移率，并利用SPSS对其迁移率进行聚类分析，结果表明南北疆棉铃虫种群存在差异性。     

Reconstruction of HaSNPV with helicoverpa hormone receptor 3

In order to develop a more efficient virus for controlling the cotton bollworm Helicoverpa armigera, Helicoverpa hormone receptor 3 （HHR3）, which is involved in the ecdysteroid regulatory pathway, was used to genetically modify wild HaSNPV. HaSNPV-HHR3 budded virus and occlusion body virus were constructed in three steps： preparation of pFastBacHaPhpP10-HHR3 donor plasmid, transposition of HHR3 into the HaBacHZ8 bacmid, and transfection of HzAM1 cells to get HaSNPV-HHR3 virus.HHR3 was proved to be expressed in the HaSNPV-HHR3 virus infected HzAM1 cells by immunoblotting. Results of bioassay indicated that the body weight of the HaSNPV-HHR3 infected larvae was lower than the larvae infected with wild virus and uninfected normal larvae, which suggests that HaSNPV-HHR3 delayed larval growth.     

高渗酮增效农药制剂对棉铃虫幼虫室内杀伤力试验研究

:用高渗酮增效的四种不同的高渗农药制剂在室内对棉铃虫幼虫的杀伤力进行了试验。结果表明 :高渗酮对农药具有显著的增效作用 ,加有高渗酮的农药可使用药量减少 5 0 %以上 ,而对棉铃虫幼虫的杀灭率明显提高。另外也表明 :高渗酮在农药增效方面优于氮酮产品     

Commercial production of transgenic Bt insect-resistant cotton varieties and the resistance management for bollworm (Helicoverpa armigera Hubner)

There are currently three kinds of transgenic Bt insect-resistant cotton germplasm lines, Shanxi 94-24, Zhongxin 94 and R19, in China. They showed high resistance to the neonate larvae of bollworm (Helicoverpa armigera). Transgenic Bt insect-resistant cotton varieties or hybrids have been bred using the three kinds of germplasm lines as parents. Our researches reveal that there exist different expressions in resistant level at different developmental stages in the three categories of germplasm lines. When neonate larvae are fed with leaves of cotton plant at the seeding stage with less than 10 leaves on the main stem, the mortality of the neonate larvae is 100%, but the resistance level will decline at later season. When Bt gene has been transferred to the cotton genome, it can be steadily transferred to the progeny, the level of resistance to bollworm keeps fundamentally uniform. Such insects as tobacco budworm (Heliothis virencens) in laboratory directive selection are very apt to produce resistance to the Bt insecticidal crystal protein. From the present crop system of cotton region in the Yangtze and Yellow River Valleys, and the expression characteristic of transgenic Bt resistant cotton, we suggest that the resistance to toxin protein in bollworm is not apt to be produced if the transgenic Bt insect-resistant cotton varieties are released and grown in the regions except in the Xinjiang cotton region. The managing strategies to delay or retard the resistance are discussed.     

新疆昌吉市棉花害虫种类及防治现状调查

对昌吉市棉花害虫种类进行了调查.结果表明:棉花害虫(螨)有17种,其中害螨4种,为害严重的害虫(螨)有棉铃虫、棉蚜、棉叶螨等.文章阐述了昌吉市棉花主要害虫的危害及防治现状,提出了今后对棉花害虫(螨)综合治理的意见和建议.