• Issue 3,1988 Table of Contents
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    • A STUDY ON THE RELATIONSHIPS BETWEEN THE PRODUCTIVITY OF Pinus massoniana PLANTATION AND SITE FACTORS IN THE MOUNTAIN AREA OF GAOZHOU COUNTY

      1988(3).

      Abstract (1059) HTML (0) PDF 320.52 K (1402) Comment (0) Favorites

      Abstract:This paper is based on the survey data of 24 sample-plots in Pinus massoniana plantaion in the mountain area of Gaozhou county, West Guangdong province. The main factors affecting the productivity of P. massoniana plantation,selected by stepwise regression analysis, are slope position, slope shape and aspect. The effect of slope position is the most significant among them. The sequence of productivities of P. massoninana plantation which on different slope positions in the same mountain area is as following, low/middle>middle>middle/above >above, the difference of which is significant or very significant.

    • EFFECTS OF SOME ORGANIC AND AMINO ACIDS ON THE ACTIVITY OF GLYCOLATE OXIDASE FROM LEAVESOFBrassica parachinensis Bailey

      1988(3).

      Abstract (1324) HTML (0) PDF 324.06 K (1574) Comment (0) Favorites

      Abstract:In this communieation we report the effects of malic and glyceric acids, serine, and glutamic acid on the activity of glycolate oxidase from the leaves of Brassica parachinensis Bailey. It was fonnd that malic acid, serine, and glutamic acia inhibited competitively the activity of glycolate oxidase;the Ki values for serine, malic acid, and glutamic acid were 5.5,7.0,and 13.5 m mol/L respectively,while the km (glycolate) of glycolaie oxidase was 0.36m mol/L determined by the Li-neweaver-Burk plots. Glyceric acid showed no marked effect on the activity of this enzyme. The significance of the regulation of glycolate oxidase by these acids in the photorespiratory glycolate pathway is discussed.

    • INDUCTION OF GLYCOLATE OXIDASE IN HIGHER PLANTS BY LIGHT

      1988(3).

      Abstract (1044) HTML (0) PDF 449.49 K (1488) Comment (0) Favorites

      Abstract:This paper gives a review about the effects of light on the activities of glyoclate oxidase in higher plants, It analyses the induction of glycolate oxidase by white light, light intensities, light qualities, etc., and discusses several hypotheses with which the former workers explained the action mechanism of light on this enzyme. On this basis, a new hypothesis is proposed, suggesting that the effect of light has two aspects. One of these is to make glycolic acid by setting photosyn-thetic process in motion. Then, being an effector, glycolic acid induces the biosynthesis of apoenzyme of glycolate oxidase. The other aspect of light effect is to acelerate the biosynthesis and changes of flavines and to raise the level of FMN in tissues. Then, FMN enters into combination with apoenzyme to make the holoenzyme of glycolate oxidase.

    • CONTROL EFFECTS OF THE SPIDERS ON RICE LEAF ROLLER LIFE SYSTEM

      1988(3).

      Abstract (1138) HTML (0) PDF 434.02 K (1335) Comment (0) Favorites

      Abstract:In this paper the control effects of the spiders on rice leaf roller ,Cnaphalocrocts medinalis, were observed as a case studies of population life systems. The state-space method can be used to study the effectiveness of different external agencies influencing a subject population and integrative effects of control methods. It may be important to study the tectics of insect pest control.

    • STUDIES ON THE KARYOTYPES OF STEINERNEMA GLASERI (NC513) AND STEINERNEMA FELTIAE (DD-136)

      1988(3).

      Abstract (1572) HTML (0) PDF 911.69 K (1475) Comment (0) Favorites

      Abstract:以格氏线虫(NC513)及小卷蛾线虫(DD-136)的幼胚、精巢及卵巢为材料,用地衣红染色、压片法制作玻片标本、对其染色体组型进行了研究,结果表明,两种线虫的染色体数目均为雌性2 N=10,雄性2 N=9。但它们的染色体组型并不一致,两种线虫的染色体组型可概括为以下公式。格氏线虫(NC513):2N=4m+6t(雌),2N=4m+5t(雄)。小卷蛾线虫(DD-136):2N=8m+2t(雌),2N=7m+2t(雄)。

    • CONTENTS OF TOOSENDANIN IN PLANTS OF MEL/A GENUS FROM DIFFERENT PARTS OF CHINA

      1988(3).

      Abstract (1538) HTML (0) PDF 339.80 K (1339) Comment (0) Favorites

      Abstract:The contents of toosendanin in plant of the Melia genus collected in different parts of China was analysed by means of HPLC. The samples of barks, fruits and leaves of Melia azedarach and M. toosendan were from Shandong, Shaanxi, Hubei, Huna, Guangdong, Sichuan, Henan, Zhejiang, and Guizhou Provinces. The collected samples were air dried. Water was used for extraction. The extracts, after removal of the fat with petroleum ether, were partitionated in chloroform. The chloroform portion of fruit and leaf extracts were further purified by column chromatography. The chloroform or purified chloroform portions were then analysed by HPLC. Results showed that the content of tooendanin in M. azedarach or in M. toosendan varies with different region of origin. The bark of M. azedarach growing in Yanhe, Guizhou Province, Xixiang, Shaanxi Province and that of M. toosendan growing in Fugou, Henan Province were found to contain the highest amount of toosendanin among the tested samples (5.160, 4.679 and 4.223mg/g, respectively). Results of HPLC analyses also showed, the constituents of the bark of the plants growing in different regions vary greatly. Much less toosendanin was found in the fruits than in the bark of M. azedarach and M, toosendan with the exception of M. toosendan fruits collected in Hangzhou, Zhejing Province, which had higher content of toosendanin than that in the bark (0.800 and 0.574 mg/g, respectively). No toosendanin was found in the leaves of these two plant species and the samples of other nine Meliaceous plants other than Melia genus.

    • STUDIES ON PIGEON PARAMYXOVIRUS TYPE 1

      1988(3).

      Abstract (1318) HTML (0) PDF 891.73 K (1299) Comment (0) Favorites

      Abstract:The clinical aspects of paramyxovirus type 1 experimental infection in pigeons were studied, and antigenic, biological, physical and chemical characterics, as well as virulence for chickens of pigeon paramyxovirus type 1 (pigeon PMV-1), were determined and compared with those of Newcastle disease virus(NDV),particularly the visce rotropic velogenic Newcastie diseasc virus(VVNDV).Inaddition,the efficacy for pigeons against NDV or Pigeon PMV-1 of sereralNeweastle disease raceines of ten used was appraised,and serological survey ofparamyxovirttS type 1 infections in pigeons in the Guangzhou and Shenzhen areaswas carried out.

    • PHARMACOKINETIC STUDY OF SULFADIMIDINE IN SWINE

      1988(3).

      Abstract (1198) HTML (0) PDF 275.97 K (1352) Comment (0) Favorites

      Abstract:7头猪(65.14±9.65kg)单剂量静注100mg/kg磺胺二甲嘧啶。给药后分别在不同时间间隔采集血样,用分光光度计测定血中游离磺胺浓度。血药浓度随时间变化符合开放二室模型,所得主要动力学参数为。分布半衰期(t1/2a)0.22±0.88(h);消除半衰期(t1/2)15.32±1.44(h);表观分布容积(V_d)4.8840±0.7821(100ml/kg);清除率(Cl_B)0.2221±0.0372(h×100ml/kg);药时曲线下面积(AUC)461.27±79.21(h×mg/100ml)有效血药浓度维持时间(Tcp(ther))31.14±4.39(h)。本文还根据单剂量给药参数推算了多剂量给药方案,供兽医临床参考应用。

    • COMPAR1S1ON OF ECG IN NINE LEADS BETWEEN PREGNANT AND NON-PREGNANT DAIRY COWS

      1988(3).

      Abstract (1226) HTML (0) PDF 387.39 K (1476) Comment (0) Favorites

      Abstract:用XQ—IA型心电图机(中国上海七一器材厂出品)对52头黑白花乳牛(内39头已孕,13头未孕)进行了心电图测定。测定心电图所用的导联共9个,即分别为:三个标准导联,三个加压肢导联和三个单极心前导联。所得结果如次:1.孕牛与未孕牛的心电轴均有左、右偏移现象;2.孕牛心率则未孕牛稍高,但不显著;3.在标准Ⅱ导联、aVR、aVF三个导联中,孕牛的P波电压比未孕牛者增加,而且在Ⅱ导联和aVR导联中非常明显(P<0.01);4.aVR、aVF的P波时间,孕牛比未孕牛有较明显的延长(0.01

    • IDENTIFICATION AND PATHOGENIC TESTS OF THE CAUSAL ORGANISM OF THE BACTERIAL WILT OF EUCALYPTUS

      1988(3).

      Abstract (1304) HTML (0) PDF 985.77 K (1262) Comment (0) Favorites

      Abstract:桉树(Eucalyptus)青枯病于1983年和1986年分别在我国广西和广东发现。该病病原菌通过本试验鉴定为青枯假单胞杆菌(Pseudomonas solanacearum Smith),属生理小种1、生化型Ⅲ。桉树青枯菌与木麻黄、番茄及甘薯等青枯菌在形态特征、染色反应、培养特性、烟叶浸润反应、碳水化合物利用能力、硝酸盐还原等生化特性、酯酶同工酶某些主酶带、过氧化物酶同工酶谱和蛋白质氨基酸成分等方面基本相同。从不同桉树树种和地理种源分离到的青枯菌菌株的致病力基本相同。桉树青枯菌对桉树的致病力较强,木麻黄、番茄、甘薯及花生青枯菌对桉树的致病力较弱。经过比饺分析,发现桉树和木麻黄、番茄、甘薯青枯菌对某些寄主的致病力可能与其酯酶同工酶存在较密切的关系。

    • THE PROBLEM ON THE CLASSIFICATION OF THE GENUS GIRONNIERA (ULMACEAE)

      1988(3).

      Abstract (1207) HTML (0) PDF 162.54 K (1412) Comment (0) Favorites

      Abstract:Dividing the genus Gironniera into the subgenus Gironniera and the subgenus Galumpita is unreasonable. The subgenus Galumpita must be cancelled. The species without a ring of stipular trace should be shifted from the genus Gironniera to the genus Aphananthe. The genus Gironniera only includes the species with a ring of stipular trace.