一种新型广谱内驱杀虫剂——驱线虫素对狗消化道线虫的驱虫效果

一种新型广谱的杀虫剂,驱线虫素对狗自然感染的多种消化道蠕虫有很好的驱虫作用。按每千克体重(BW)给药0.2—0.4mg(液体药物装入胶囊中投服),对犬弓首蛔虫,狮弓蛔虫,犬钩虫和狭首弯口线虫的驱虫率为100％;用含量为4.6％的片剂(每片重267mg),按每20千克体重投1/3片(约为0.2mg/千克体重),对犬弓首蛔虫、犬钩虫和狭首弯口线虫的驱虫效果同样为100％,这两种剂型,加大用量至每千克体重0.6—0.8mg,对狐鞭虫感染的驱虫效果可达99—100％。使用该药的治疗剂量没见动物发生任何不良反应。     

硝硫氰醚驱除牦牛、绵羊和山羊寄生蠕虫的试验

作者首次用硝硫氰醚驱除牦牛、绵羊和山羊的寄生蠕虫。结果表明:对牦牛,硝硫氰醚的剂量在50mg/kg和60mg/kg时的驱虫效果较好,尤以60mg/kg为佳,对肝片形吸虫、钩虫和肺线虫的驱虫率均达100％,对前后盘吸虫为98.5％;对藏系绵羊守生蠕虫以60mg/kg硝硫氰醚和50mg/kg的硝硫氰醚加8mg/kg左旋咪唑为好,对肝片形吸虫、莫尼茨绦虫、肺线虫和羊钩虫的驱虫率均达到100％,对前后盘吸虫分别达99.6％和99.9％,对毛首线虫分别为98.6％和99.0％;对山羊的多种寄生蠕虫,硝硫氰醚亦有较好的驱除效果。     

“害获灭”驱除山羊内外寄生虫的试验

“害获灭”(Ivomec)对山羊内外寄生虫的驱杀试验,国内报道甚少。我们于1990年4—5月在汶川县威州乡用该药对18只山羊(试验组12只、对照组6只)的内外寄生虫进行了驱除试验。试验结果,Ivomec按0.2mg/kg一次颈部皮下注射,对线虫的驱虫率为94.0—100％(其中:毛首线虫Trichuris为94.0％、奥氏线虫T·ovina为95.4％、捻转胃虫H·contortus、羊仰口线虫B·trigonocephalum、微管结节虫O·venulosum、舒氏歧尾线虫B·schulzi均为100％),对外寄生虫——微小牛蜱B·microplus、台湾角血蜱H·cornigera、山羊腭虱L·stenopsis、山羊毛虱D·caprae的杀灭率均为100％。该药注射时出现极短暂的疼痛反应外,在整个试验期内未见任何不良现象。     

四种药物直接投入鸡腺胃驱除长鼻分咽线虫的研究

鸡长鼻分咽线虫目前还未见理想的驱虫药物和方法,笔者就线虫有高效的四种药物,用直接投入鸡腺胃方法,驱除鸡长鼻分咽线虫。结果伊维菌素、盐酸左咪唑对该线虫有较理想的驱除效果,分别达到75％～85％,75％～80％。     

长白山林区中国林蛙体内肺线虫调查

通过解剖镜检测分析了长白山林区不同地点、年龄组、性别及生活期中国林蛙肺线虫的感染情况.结果表明：中国林蛙肺线虫为双角棒线虫（Rhabdia bufonis）,感染率为81.5%.不同地点肺线虫感染率差异不显著（P﹥0.05）,不同地点肺线虫平均感染强度差异显著（P〈0.05）;不同年龄林蛙的肺线虫感染率差异较大,成体感...     

丙硫苯咪唑对牦牛、绵羊寄生蠕虫的驱虫试验

丙硫苯咪唑是我国农业部兽医药品监察所于一九七九年按国外配方合成的一种广谱驱虫药,近两年来,先后在浙江、江苏、广西、四川等省用该药对猪、牛、羊的寄生蠕虫进行了驱虫试验,证明了丙硫苯咪唑能驱除上述动物的多种寄生蠕虫,但对具体虫种的驱虫效果,特别是对前后盘吸虫和毛首线虫的效果,各地报导都不尽相同,为了弄清该药对高原上的牦牛、绵羊寄生蠕虫的驱虫效果。我们于一九八二年四月在若尔盖县某牧场对“春乏期”自然     

害获灭（Ivomec）驱除犬体部分内,外寄生虫疗效观察

从市场购回土种犬２０只，通过寄生虫常规检查，确诊为分别自然感染了犬钩虫、蛔虫、绦虫和体表寄生虫．根据犬所感染寄生虫的种类，分成５个组，用不同剂量的害获灭（Ｉｖｏｍｅｃ）进行疗效试验，筛选出适宜于驱除犬体内部分线虫和体表寄生虫混合感染或单纯性体表寄生虫感染的有效剂量——１０００μｇ／ｋｇ．并用于临床治疗，共治愈病犬１７００只，驱虫（杀）率均达１００％．     

4—氨基—6—三氯乙烯—1,3—苯双磺胺对牛、羊肝吸虫的驱虫效力

对于苯磺胺类药物经过大量的化学研究和生物学试验结果,证明4—氨基—6—三氯乙烯—1,3—苯双磺胺(4—Amino—6—Trichloroethenyl—1,3—Benzenedisulphonamide)对驱除片形科吸虫是最有效的。其剂量,在犊牛和绵羊每公斤体重为10毫克和15毫克,对童虫驱虫效力为97%和92%;在牛、羊每公斤体重一次给药3.75毫克。可将体内的成虫驱除尽.     

松材线虫拮抗细菌的筛选和鉴定

为了筛选对松材线虫(Bursaphelenchus xylophilus)具有较高杀线活性的拮抗细菌,从马尾松林中分离获得了230株细菌,并从中筛选出8株对松材线虫具有较高杀线活性的细菌,其中JK-JS3菌株对松材线虫的杀线活性最高.将该细菌培养滤液分别稀释2倍、4倍、10倍处理松材线虫,72h后线虫的死亡率均达到100%;线虫死亡后虫体消解,消解率分别为100%、97.8%、96.4%.测定了该细菌培养滤液对香蕉穿孔线虫(Radopholus similis)和水稻干尖线虫(Aphelenchoides besseyi)等植物线虫的杀线活性,结果表明对不同种的线虫杀线活性有差异.该菌株培养滤液对松材线虫和小杆线虫(Rhabditis sp.)的杀线活性最高,其余杀线活性从高到低依次为拟松材线虫(Bursaphelenchus mucronatus)、腐生线虫(Panagrellus redivivus)、香蕉穿孔线虫和水稻干尖线虫.形态特征和革兰氏染色观察,该细菌为革兰氏阳性菌、产芽孢、具有周生鞭毛;经Biolog细菌鉴定仪进一步鉴定该细菌为解淀粉芽孢杆菌(Bacillus amyloliquefaciens).     

松树寄生线虫的收集与保存

枯死松树体内寄生线虫种类较多,笔者共收集了线虫资源212个株系.按线虫种类分,包括松材线虫171个株系,拟松材线虫22个株系、霍夫曼尼伞滑刃线虫5个株系、薄荷滑刃线虫1个株系、大核滑刃线虫8个株系、长尾属线虫3个株系以及外滑刃科线虫2个株系,松材线虫收集率为80.7%.按线虫来源分,包括中国线虫198个株系、日本线虫10个株系、美国线虫2个株系、加拿大和韩国线虫各1个株系,中国线虫收集率为93.4%.将212个线虫株系用灰葡萄孢菌培养保存,其中173个株系松材线虫、5个株系拟松材线虫及其他线虫5个株系还采用了DNA-20℃和-80℃保存.这是我国首次大规模保存松树线虫资源.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Editorial note for the special topic on ＂Nanopore Analysis＂

The concept of nanopore analysis, using the pore-forming protein a-hemolysin to detect individual nucleic acids at a single-molecule level, was first proposed in 1996. Over the past two decades, tremendous progress has been made in the nanopore field, and nanopore analysis has become a label-free and high-throughput method for probing bio- molecules and other analytes with single-molecule sensi- tivity, especially holds the promising for ＂third generation＂ DNA sequencing. However, challenges still remain in the experimental strategies and the design of whole nanopore-based instruments. Here, we proudly present a special topic dedicated to the topic of ＂Nanopore Analysis＂, with 8 reviews/articles providing up to date coverage of the experimental strategies, theoretical calcu- lations and simulations, and instrument design. Reviews and articles on the experimental strategies cover control of DNA partitioning into a nanopore, detection of target DNA, and the advantages of nanopore-based DNA sequencing. The theoretical calculations and simulations discuss the translocation behavior of DNA, and an inte- grated measurement system and data analysis software are presented for instrument design.     

Effects of climate change on biodiversity

1 Rise of studies on climate change＇s effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America＇s annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].     

Discussing the Expansive Learning in Modern Organizations

<正>1 Introduction Endeavours on learning methods have long occupied the mind spaces of scholars and there have been theories abound on how people learn and in what way organisations can use some of the knowledge gained in the art of learning to maximise human productivity.While the theories by themselves are not solutions to problems,they are steps of inquiry that provide us with interesting perspectives that we can use to extend our knowledge of the dimensions of learning.This paper is an exploratory work on the theories postulated by three notable scholars including Zimmerman     

Progress in Linear Scaling Non-Orthogonal Localized Molecular Orbitals Method

The non-orthogonal localized molecular orbital(NOLMO)is the most localized representation of electronic degrees of freedom.As such,NOLMOs are thus potentially the most efficient for linear scaling calculations of electronic structures for large systems.However,direct ab initio calculations with NOLMO have not been fully implemented and widely used,partly because of the slow convergence issue in the optimization of NOLMO.We devel-     

An Accurate and Universal HEOM Approach to Strongly Correlated Quantum Impurity Systems

A hierarchical equations of motion(HEOM)approach is developed for general open quantum systems coupled to fermionic environment.The HEOM method is in principle formally exact,as it resolves nonperturbatively the combined effects of many-body interaction,system-bath dissipation,and non-Markovian memory.In practice,the HEOM approach is highly accurate and efficient for the characterization of strongly correlated quantum impurity sys-     

关于有理混合吸引子的Ciric型非唯一不动点定理

本文我们应用有理混合吸引子条件去证明具非唯一不动点的映射Ciric型的若干不动点定理.结果推广并改进已知的一些结果.     

次线性算子交换子在变指数Herz-Morrey空间上的有界性

本文主要利用给出的次线性算子分别与BMO函数及Lipschitz函数生成的交换子在变指数L~(p(·))(R~n)空间上的有界性,证明了其在变指数Herz-Morrey空间MK_(q,p(·))~α~((·)),λ(R~n)上的有界性.     

利用GPS双频观测值实现PPP电离层延迟高阶项改正

给出了利用双频观测值计算L3组合电离层延迟高阶项改正的方法,并与全球电离层延迟文件的改正效果进行对比.利用赤道附近的15个国际全球卫星导航定位系统服务组织(IGS)站的数据进行比较,结果表明:2种方法计算的电离层二阶项延迟互差最大不超过1 cm,三阶项延迟互差最大不超过5 mm;电离层高阶项改正后的观测值精密单点定位(PPP)解算结果N、E、U方向互差平均值分别为0.4、0.5、1.0mm,因此2种改正方法效果在同一水平.