枯萎病菌的PCR-RFLP分子检测和早期诊断

采用自行设计的、能对镰刀菌18srDNA进行特异性扩增的1对引物,利用PCR-RFLP对尖孢镰刀菌以不同方式侵染的植株进行跟踪检测。结果表明,应用PCR-RFLP检测程序可检测出处于侵染初期和潜育期的枯萎病菌,说明PCR-RFLP能够快速、灵敏、准确地对枯萎病进行早期诊断。     

廊坊市城镇居民体育消费心理调查与分析

如何针对廊坊市居民高度群居的特点，引导廊坊市居民的体育消费，推动新经济形式下社区体育产业的发展，是社区体育一个重要的研究课题．本文从运动心理学的角度，调查分析了廊坊市有代表性的不同地域居民的体育消费状况，提出了一些完善居民小区体育消费服务的建议，旨在为研究开拓社区体育市场提供一些参考数据．     

新疆忍冬属（Lonicera L．）新植物

根据现有资料和标本，新疆忍冬属（Ｌｏｎｉｃｅｒａ）共有２０种（包括引入栽培种），其中有３个新纪录种；（１）奥尔忍冬Ｌ．ｏｌｇａｅＲｇｌ．ｅｔＳｃｈｍａｌｈ．；（２）杈枝忍冬（赛小叶忍冬）Ｌ．ｓｉｍｕｌａｔｒｉｘ　Ｐｏｊａｒｋ．；（３）伊犁忍冬Ｌ．ｉｌｉｅｎｓｉｓ　Ｐｏｊａｒｋ．和１个新变种：细叶忍冬Ｌ．ｓｔｅｎａｎｔｈａｖａｒ．ａｎｇｕｓｔｉｆｏｌｉａ　Ｃ．Ｙ．ＹａｎｇｅｔＪ．Ｈ．Ｆａｎ及１新种：圆叶忍冬Ｌ．ｓｕｂｒｏｔｕｎｄａｔａＣ．Ｙ．ＹａｎｇｅｔＪ．Ｈ．Ｆａｎｓｐ．ｎ．等，都是《中国植物志》７２卷没有记载过的，现在此发表。     

Development and Identification of Triticum aestivum L.-Thinopyrum bessarabicum L(o)ve Chromosome Translocations

With ass7istance of chromosome C-banding and genomic in situ hybridization(GISH)combined with meiotic analysis,five germplasms with homozygous wheat-Th. Bessarabicum chromosome translocations were developed and identified among BC1F5 progenies of the cross between T. Aestivum cv. Chinese Spring and Chinese Spring-Th. Bessarabicum amphiploid. These lines included Tj01 and Tj02(2n=44)containing a pair of wheat-Th. Bessarabicum translocation chromosomes besides a pair of added Th. Bessarabicum chromosomes,Tj03(2n=44)with a pair of added interspecific translocation chromosomes,Tj04(2n=44)containing a pair of interspecific translocation chromosomes besides an added pair of Th. Bessarabicum chromosome arms and Tj05(2n=46)containing a pair of interspecific translocation chromosomes besides two pairs of added intact alien chromosomes. The breakpoints of all the translocations were found to be not around centromere. Meanwhile,all the lines showed normal plant growth,development and fertility,while the translocation chromosomes transmitted regularly. The obtained translocations might be of use for transferring elite genes from Th. Bessarabicum into wheat.     

Oral Insulin Stimulates Intestinal Department and Enzyme Maturation in Newborn Pigs

The effects of oral insulin on intestinal tissue growth and brush border enzyme activities in newborn pigs were examined in this study. Newborn unsuckled pigs were bottle-fed for3 days with artificial milk(M),milk supplemented with 60mIUmL-1 of insulin(IH)or hydrolyzed milk(HM). Compared with newborn unsuckled pigs,piglets bottle-fed for 3 days all gained in intestinal weight and length significantly despite a mild loss in body weight during the experimental period. The activities of lactase and alkaline phosphatase(AKP)in the small intestinal mucosa declined markedly in pigs fed with M,but the activity of maltase increased significantly during the experimental period. Dietary protein pre-hydrolysis had no significant effect on intestinal tissue mass or length,but it moderated the decline of intestinal lactase and AKP activities. Dietary supplementation of insulin significantly increased mucosal protein content and brush border activities of lactase,maltase,AKP and aminopeptidase(AP)in the small intestine.The effect. of insulin treatment was particularly obvious at the distal region of the small intestine. These results demonstrate that oral insulin can stimulate intestinal digestive enzyme activities in newborn pigs. The finding supports the hypothesis that milk-borne insulin plays a role in regulating postnatal gut development in the suckling young.     

犬精液冷冻与人工授精的研究——Ⅱ稀释液和冻精剂型对犬冻精解冻后活力的影响

从6条公犬采集其浓份精液36次.分别在稀释液Ⅰ和Ⅱ中冷冻成三种剂型的冻精(颗粒0.5ml细管和安瓿),根据解冻后活力比较其优劣.研究表明:稀释液Ⅰ中三种剂型的平均解冻后活力(0.35±0.04)显著高于稀释液Ⅱ(0.23± 0.05;P<0.01);两种稀释液中颗粒冻精的平均冻后活力(0.34±0.08)显著地高于细管(0.26±0.09;P<0.01)和安瓿(0.26±0.08;P<0.01);细管和安瓿之间差异不显著(P>0.05).     

中国泡桐属新植物

本文发表了中国泡桐属1新种、2新变型,即山明泡桐Paulownia lamprophylla Z.X.Chang etS.L.Shi,sp.nov.;圆叶山明泡桐P.lamprophylla f.rotanda Z.X.Chang et S.L.Shi.fnov.;白花兰考泡桐P.elongata S.Y.Hu f.alba Z.X.Chang et S.L.Shi.f.nov.除外部形态特征外,并从叶片解剖、生物学、生态学及木材构造等方面论证了新种与邻近种的差异。     

大孢指疫霉三个新变种的研究

 本文报道大孢指疫霉Sclerophthora macrospora可区分为3个变种,即大孢指疫霉水稻变种S.macrospora var.oryzae var.nov.,大孢指疫霉小麦变种S.macrospora var.triticina var.nov.和大孢指疫霉玉蜀黍变种S.macrospora var.maydis var.nov.,新变种有汉文和拉丁文描述及形态图,地理分布。     

旋耕埋草机立刀设计功能实现程度的分析

以1GMC-70型船式旋耕埋草机立刀为研究对象,分析立刀设计功能,建立立刀刃口函数曲线,并利用Matlab软件进行立刀运动学分析。结果表明:立刀当前的结构参数不能很好地与其设计功能相匹配,立刀对螺旋横刀切土节距的增加量小于螺旋横刀切土节距的1/3,立刀自身的秸秆切断效应以及辅助螺旋横刀处理秸秆等效应都比较弱;立刀对未耕土壤有破茬作用,但破茬深度约为垡片最大厚度的1/3,破茬效应较小;立刀对刀辊后方已耕土壤几乎没有碎土效应;立刀没有将垡条切断,它只切割了垡条横截面积的40%左右;立刀的4-3-4-3-4焊接排布方式没有增加自身作业机会。田间作业试验表明,旋耕埋草机是否设置立刀对作业效果没有区别,故在当前结构参数下立刀没有实现其设计功能,建议重新设计立刀。     

文学批评的改造与独立——从艾·阿·瑞恰兹到诺斯罗普·弗莱

在英美文学批评的发展过程中，有一个阶段十分重要。在这一阶段，批评不但摆脱了传统的印象式文学鉴赏形式，在文学内部被重新定义，而且逐渐被专业化和制度化，成为大学教育中的一门学科。这一过程中，瑞恰兹、克莱恩、兰色姆和弗莱几位批评家起到了至关重要的作用,文章讨论这几位批评家是如何重新定义文学批评并使之适应大学教育，并最终使批评独立于其他学科的。