应用斑点免疫金渗滤法诊断犬弓首蛔虫病

根据免疫渗滤原理,采用犬弓首蛔虫抗原蛋白和胶体金标记SPA,建立抗犬弓首蛔虫抗体的斑点免疫金渗滤法(D IGFA)检测200份犬血清样本。结果:阳性检出率为8.00%(16/200);血清样本对应犬粪便用饱和盐水漂浮法检查虫卵,阳性检出率为2.0%(4/200)。结论:斑点免疫金渗滤法具有操作简便、灵敏度高、特异性强的优点,可用于犬弓首蛔虫病的早期、快速检测。     

斑点免疫金和免疫金/银染色法检测烟草环斑病毒

在硝酸纤维素膜上进行的斑点免疫胶体金检测烟草环斑病毒技术已经建立.免疫金染色检测提纯病毒的灵敏度为25ng,检测病汁液可稀释10倍.使用免疫金/银染色则灵敏度更进一步提高.     

猪瘟病毒抗原胶体金快速检测试纸的研究

应用胶体金标记技术(Immunogold Labelling Technique)与免疫层析技术相结合,在玻璃纤维膜、硝酸纤维膜的检测线(T)和对照线(C)上分别喷上胶体金与猪瘟(CSF)单克隆抗体(Ab2)的偶联物、CSF单克隆抗体(Ab2)和羊抗鼠IgG多克隆抗体,制成检测CSF抗原的"猪瘟抗原胶体金快速检测试纸".用该试纸检测"猪瘟弱毒活疫苗"和猪瘟脾淋弱毒苗均显阳性,而对猪源性的其它病毒、细菌抗原均显阴性.经临床测试,该试纸具有微量、特异、快速、简便和结果容易判定的优点,可作为检测猪瘟抗原的一种新试剂.     

甜菜（Beta vulgaris L）物质生产与碳水化合物代谢的生理生态学研究──第Ⅴ报可溶性糖分的分配动态与蔗糖积累遗传差异的研究

利用１４Ｃ标记研究了不同类型品种甜菜生育期间主要糖分的运转分配动态与蔗糖积累遗传差异．结果表明，在生育期间，叶片中葡萄糖和果糖占叶片和根内３种糖（葡萄糖、果糖和蔗糖）的百分比分别呈先下降后上升趋势，而根中两种糖的百分比呈下降趋势．叶片中蔗糖占叶片和根内３种糖（葡萄糖、果糖和蔗糖）的百分比呈先上升后下降趋势，但根中蔗糖的百分比始终保持上升趋势，甜菜糖分代谢强度随生育期而改变．高糖型品种叶片中葡萄糖、果糖和蔗糖的百分比都分别低于其它类型甜菜３种糖的百分比，而根中３种糖的百分比分别高于其它类型甜菜３种糖的百分比．说明高糖型品种叶片蔗糖合成和运转分配能力强，根部具有优势的蔗糖贮藏能力，最终表现为根中高额蔗糖的积累．     

Partitioning of C-photosynthates from different current shoots neighboring with fruiting spur in later-maturing Japanese pear during the period of rapid fruit growth

To elucidate the fate of photosynthates from different current shoots and their influence on fruit growth and bud differentiation in neighboring spur complex during the period of rapid fruit growth in two late-maturing Japanese pear cultivars: ‘Atago’ and ‘Shinkou’ with contrasting fruit size, ¹³C labeling of single shoot was done to investigate of C-relations in fruit branches of eight shoot-combinations. The results showed that all of the current shoots investigated (bourse shoots of nonfruiting spur, bourse shoots of fruiting spur, extension shoot, nonfruiting spur, vegetative shoot, and water sprout) could export photosynthates to the neighboring fruit and buds. Water sprouts together with vegetative shoots, bourse shoots, and extension shoots are important source for fruit growth after shoot growth termination during the period of rapid fruit growth in production of late-maturing pears. The carbon transfer rate from the neighboring to the fruit bearing spur is depent (i) on the types of shoot which acts as C source, (ii) on the position of the fruiting spur and (iii) on the source-sink distance. Furthermore, the cultivar difference in carbon partitioning from different current shoot-combinations confirmed that the movement of photosynthates into the fruit was determined by sink strength of the fruit, and ‘Atago’ exhibited a greater relative sink strength of fruit than ‘Shinkou’. In addition, vegetative shoots are very important C sources for fruit growth in ‘Atago’ and the growth pattern of bourse shoot seriously affects C allocated to fruit in ‘Shinkou’.     

Non‐uniformity of 15n labelling in plant material

Abstract

Data illustrating the diluting effect of distillation of “blank nitrogen”; on the ¹⁵N enrichment of aliquots containing small amounts of ammonium sulphate are presented. Non‐uniformity of ¹⁵N‐labelling of plant material is illustrated by two examples. In one, significant variation in ¹⁵N enrichment is shown for various parts of wheat plants grown in soil to which single addition of labeiled nitrate had been made. In a second example, the enrichment of Rhodesgrass plants grown in sand was found to be lower than that of the labelled nitrogen source, which constituted the only nitrogen added by the experimenter.     

猪圆环病毒2型抗体胶体金检测试纸条的研制

应用胶体金免疫层析技术,采用柠檬酸三钠还原法制备胶体金颗粒,在玻璃纤维膜上包被胶体金标记PCV-2抗原(cap蛋白),在硝酸纤维素膜上检测线和对照线处分别包被PCV-2抗原(cap蛋白)和PCV-2单抗,制成猪圆环病毒2型抗体免疫金标检测试纸条。该试纸条与猪圆环2型抗体酶联免疫检测试剂盒对比,符合率为94.7%,整个实验过程只需15 min,与ELISA试剂盒比较,具有操作方便、快速、直观的优点。     

家蚕微孢子虫(Nosema bombycis)侵染家蚕丝腺组织后的免疫胶体金标记观察

为了探讨家蚕微孢子虫(Nosema bombycis)功能基因组研究方法和手段,利用免疫胶体金标记电镜技术,对被感染的家蚕丝腺组织中家蚕微孢子虫的蛋白质分泌状况进行了观察。结果显示,有大量的胶体金颗粒存在于家蚕微孢子虫寄生位点的宿主组织内,说明了家蚕微孢子虫寄生位点的宿主组织内存在大量的孢子蛋白质,证实了家蚕微孢子虫在寄生过程中将许多孢子蛋白质分泌到宿主体内。初步探讨了家蚕微孢子虫与宿主家蚕之间的互作关系。     

A菌根真菌外生菌丝对难溶性无机磷酸盐的活化及利用Ⅰ.~(32)P间接标记法

采用三室栽培装置培养三叶草 ,接种VA菌根真菌Glomusmosseae。将根系与VA菌根真菌外生菌丝隔开 ,在菌丝室施用 5种磷酸盐和32 P间接标记磷肥 ,研究外生菌丝对难溶性磷酸盐的活化利用能力。结果表明 ,外生菌丝可以活化吸收磷酸二钙、磷酸八钙、磷酸铝和磷酸铁 ,无法活化利用磷酸十钙 ;各种磷酸盐被活化吸收的量及其对三叶草磷营养的贡献率的大小顺序是磷酸二钙 >磷酸八钙、磷酸铝 >磷酸铁     

免疫胶体金标记技术及其在植物保护上的应用前景

综述了胶体金制备、质量鉴定方法 ,胶体金探针的制备、纯化方法 ,以膜为固相载体的免疫胶体金快速试验即免疫层析和免疫渗滤试验技术 ,以及免疫胶体金标记技术在植物保护研究领域中的应用前景。