民营企业分化问题研究     

马同斌  徐红梅  史亚军 《北京农学院学报》2003,18(3):217-222

中国民营企业存在迅速兴起后大量分化的现象,揭示其根本原因对于民营企业持续发展具有重要意义。从民营企业创业者遵循的价值观对公司治理结构影响因素的分析入手,研究了民营企业的分化机制,得出了民营企业实行“劳动股份制”是产生这一现象的体制原因的结论,并指出了避免分化的改造方向。  相似文献   

麦盖提羊体重与脂肪相关性的研究     

买买提明巴拉提  多里坤  早热古里  茹鲜  怕尔哈提  王军  米娜瓦尔 《四川畜牧兽医》2002,29(Z1):21-22

本文主要对麦盖提羊体重与脂肪指标的相关性进行研究分析,并对体重与尾脂重.网油重和肾油重的相关性进行研究分析,认为麦盖提羊活重与胴体重.胴体重与尾脂重,网油重和肾油重之间有不同程度的正相关关系,周岁公母羊活重与胴体重的相关系数分别为0.914和0.997胴体重与尾脂重的相关系数分别为0.56和0.75而且差异极显著.成年公母羊胴体重与尾脂重的相关系数分别为0.73和0.70而且差异极显著.同时指出降低油脂含量和尾脂比重的具体做法,这对麦盖提羊现代育种提供科学的依据.  相似文献   

Prognostic significance of serum alkaline phosphatase activity in canine appendicular osteosarcoma   总被引：3，自引：0，他引：3  

Garzotto CK  Berg J  Hoffmann WE  Rand WM 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2000,14(6):587-592

Sixty-one dogs with appendicular osteosarcoma were treated with amputation and chemotherapy of cisplatin and doxorubicin. Serum samples were obtained before and after treatment for determination of total alkaline phosphatase (TALP) activity as well as the activities of the constituent bone (BALP), liver (LALP), and corticosteroid-induced (CALP) isoenzymes. The relationship between alkaline phosphatase activities and survival was examined by Cox proportional hazards regression analysis and Kaplan-Meier log rank analysis. Mean activity of TALP, BALP, and LALP decreased significantly after treatment (P < .001). TALP and LALP activities before treatment were significantly correlated with survival (P = .006 and .001, respectively). The correlation between BALP activity before treatment and survival approached significance (P = .054). CALP activity and TALP, BALP, and LALP activities after treatment were not significantly correlated with survival. Dogs with normal pretreatment TALP and BALP activities survived significantly longer than dogs with increased pretreatment activities (P = .001 and .003, respectively). Median survival times for dogs with normal or increased TALP activities before treatment were 12.5 and 5.5 months, respectively; and median survival times for dogs with normal or increased BALP activities before treatment were 16.6 and 9.5 months, respectively. In the design of future clinical trials involving dogs with osteosarcoma, consideration should be given to stratifying the randomization according to alkaline phosphatase activity. In addition, alkaline phosphatase activity should be a factor considered by clinicians attempting to tailor the aggressiveness of adjuvant chemotherapy to the needs of individual patients or owners.  相似文献   

四种实验动物脏器质量系数的测定     

韩芬茹 《畜牧兽医杂志》2006,25(4):1-3

对鲤鱼、蟾蜍、家鸡、家兔四种动物主要内脏器官进行称量并对脏器系数进行测定,对同类动物不同性别间脏器系数的差异和各脏器系数之间的大小进行了比较。结果表明,鲤鱼、蟾蜍和家兔各脏器质量,雌雄间无明显差异,但家鸡部分脏器质量雌雄间有明显差异。家鸡的脏器系数(肝脏除外),雄性明显高于雌性(P<0.05),鲤鱼和蟾蜍的肾脏系数性别差异显著(P<0.05)。四种动物的心脏系数:家鸡>蟾蜍>家兔>鲤鱼;肝脏系数:家兔>蟾蜍>家鸡;肺脏系数:蟾蜍>家鸡>家兔;脾脏系数:鲤鱼>家鸡>家兔>蟾蜍;肾脏系数:家鸡>家兔>蟾蜍>鲤鱼。由此可见,动物的脏器系数的大小与其进化水平有一定的相关性。  相似文献   

高校勤工助学应从体力型转向智力型     

周海蓉 《四川畜牧兽医学院学报》2006,4(1):199-201

在国家建立的资助经济困难学生的奖、贷、助、补、减政策体系中，勤工助学具有独特的地位和作用。随着社会的发展，体力型勤工助学已经越来越不能满足贫困学生的需要。要想完全发挥勤工助学的作用，必须将勤工助学从体力型转向智力型。  相似文献   

Genome-wide Association Study on Alive Litter Size Trait in Bama Xiang Pigs     

MO Jiayuan  GAO Jiuyu  FENG Lingli  LI Yueyue  TIAN Weilong  LIU Xiaoxiao  CHENG Feng  LIANG Liang  LEI Shuqiao  WEN Wei  LIANG Jing  LAN Ganqiu 《中国畜牧兽医》2007,47(12):3965-3975

In order to identify the molecular markers related to alive litter size of Bama Xiang pigs,the genome-wide association study (GWAS) was used to map and screen the candidate genes affecting the alive litter size trait.Ear tissue samples of 297 Bama Xiang pigs with multiple parity records were collected,and DNA was extracted and genotyped by porcine 50K SNP beadchip.After quality control and genotype imputation,the alive litter size of Bama Xiang pigs were GWAS by Tassel.The results showed that the average number born alive per litter of Bama Xiang pigs increased gradually with the increasing of parity in the range of 1-9 parities.A total of 32 816 SNPs were obtained after quality control and filtration.8 SNPs related to alive litter size of Bama Xiang pigs were screened by genome-wide association analysis,which were significant at genome or chromosome level.Based on the enrichment analysis of the coding genes in the region between 500 kb upstream and downstream of the associated significant SNP loci,and the QTL regions and gene functions related to porcine reproductive traits,4 genes (CAPZB,MSH3,CITED2 and HSD17B7) were finally identified to be candidate genes related to alive litter size of Bama Xiang pigs.  相似文献   

提高牛乳中共轭亚油酸含量的研究进展     

赵骞  赵悦  王琳琳  魏巍  林玉才  孙永强 《中国畜牧兽医》2006,33(4):25-27

共轭亚油酸已成为目前药物、食品及动物营养等研究领域的一个热点,其保健作用引起越来越多的关注和重视。作者阐述了现阶段提高牛乳中共轭亚油酸含量的各种方法和手段,为今后共轭亚油酸的深入研究作一参考。  相似文献   

0.13%百瓒防蛀气雾剂毒理学研究     

孔海苏 《青海畜牧兽医杂志》2006,36(2):19-20

对0.13%百瓒防蛀气雾剂及其主要有效成分辛硫磷进行了毒理学研究。结果表明:急性吸入毒性(LC50):雌、雄小鼠均大于2150mg/m3;急性经口毒性(LD50):小鼠为9 210mg/kg;皮肤刺激实验:无刺激作用;皮肤变态反应:致敏率为“0”;眼刺激试验:无刺激性;辛硫磷原药(85%)对大鼠28d亚急性吸入毒性:对雄、雌性大鼠无作用浓度(NOAEL)均为10mg/m3。  相似文献   

猪链球菌2型四川分离株猪体回归试验   总被引：5，自引：3，他引：5  

王君玮  王志亮  赵永刚  赵云玲  郑东霞  王伟伟  王涛  刘华雷  陈义平  王珊 《中国兽医学报》2006,26(5):508-511

选用35~38日龄的健康断奶仔猪21头,分3组,用2005四川分离株SSsc0501分别经静脉、肌肉注射和口服3种途径感染,进行猪体回归试验。肌肉注射组(含菌0.6×108个/mL)16 h开始出现症状,至36 h全部死亡,发病率、病死率均为100%;静脉注射组(含菌0.2×108个/mL)25 h开始出现症状,48 h内全部死亡,发病率和病死率均为100%;口服攻毒组(含菌2×108个/mL)90 h后开始有发病症状,第9天有1头死亡,发病率75%,病死率33%。从感染病死猪的肝脏、脾脏、肾脏、心血、大脑、脑脊液、淋巴结、肺脏和关节液中均分离到链球菌,经鉴定为试验攻毒的目的菌,表明猪体能够很好地用于猪链球菌2型动物感染模型,同时说明该菌侵害器官广泛,为进一步探讨该病的综合防制提供了重要技术依据。  相似文献   

蛹虫草5个选育菌株的品比试验   总被引：1，自引：0，他引：1  

李森柱  夏凤娜  杨小兵 《中国食用菌》2006,25(6):15-16,19

采用加富PDA培养基对保藏的5个蛹虫草菌株进行菌丝生长速度和形态比较．并采用加富米饭培养基进行栽培性能比较．筛选出子座健壮、产量高、生产周期短、适合在南方地区春夏季节栽培的蛹虫草菌株CS—7。  相似文献