2017年北京市猪伪狂犬病血清学调查     

张跃  宋彦军  周德刚  冯小宇  李刚  梅力  严亚军  余琦  刘晓冬  张启龙 《中国动物检疫》2018,35(9):13-15

为了解北京市猪伪狂犬病野毒感染情况,2017年从北京市7个区157个养猪场（户）,采集5 469份猪血清样品,采用猪伪狂犬病病毒（PRV）gE抗体酶联免疫检测试剂盒进行血清学调查。结果显示：北京市7个区均有不同程度的PRV野毒感染,平均样品阳性率为53.36%。其中：经产母猪阳性率最高（58.28%）,其次是育成猪（57.55%）、育肥猪（54.49%）,后备母猪阳性率最低（37.46%）;散养户的样品阳性率较高,为66.42%,规模猪场的阳性率较低,为47.71%。调查结果表明,北京市PRV野毒感染较为严重,对猪场采取伪狂犬病净化和综合防控措施势在必行。  相似文献   

Effect of Luteolin on Blood Indexes,Liver and Kidney in Mice with Acute Mercury Poisoning     

TAN Xiao  YANG Da-qian  ZHANG Hai-li  JIANG Jing  CHEN Yan  ZHANG Zhi-gang 《中国畜牧兽医》2016,43(6):1506-1511

To study the effect of luteolin on blood indexes,liver and kidney in mice with acute mercury poisoning,28 mice were randomly divided into four groups:Control group (intraperitoneal injection 0.9% saline),luteolin group (lavage 100 mg/kg luteolin),mercuric chloride group (intraperitoneal injection 4 mg/kg mercury chloride) and mercury chloride+luteolin group (intraperitoneal injection 4 mg/kg mercuric chloride,lavage 100 mg/kg luteolin).The activities of ALT in serum,AST,CREA and BUN contents,blood WBC,RBC,HGB content and GSH and MDA contents of liver tissue were detected.Morphological changes of liver and kidney tissues were observed.The results showed that compared with the control group,the activities of ALT and AST of mercuric chloride group were extremely significantly increased (P < 0.01),serum CREA,BUN,blood WBC and liver tissue MDA contents were significantly increased (P < 0.05) while blood RBC,HGB and liver tissue GSH contents were significantly decreased (P < 0.05).Liver,kidney pathological changes were obviously.Compared with mercuric chloride group,the activities of ALT,AST in serum,CREA,BUN,blood WBC and liver tissue MDA contents of mercuric chloride+luteolin group were significantly decreased (P < 0.05),while blood RBC,HGB and liver tissue GSH contents were significantly elevated (P < 0.05).Liver,kidney pathological changes were attenuated obviously.The poisoning were characterized by inflammation and the occurrence of anemia when acute mercury poisoning occurred,liver and kidney showed different degrees of injury in mice.Luteolin could reduce the toxic effects of acute mercury poisoning on blood,liver and kidney.  相似文献   

基质浇施黄腐酸钾对黄瓜幼苗的影响   总被引：1，自引：0，他引：1  

周燕  王吉庆  任毛飞  李宇 《长江蔬菜》2016,(12):81-83

对基质栽培的黄瓜幼苗浇施不同浓度的黄腐酸钾,通过研究其对黄瓜幼苗形态指标(株高、茎粗、根体积、最大根长、地上、地下部干鲜质量)、壮苗指数、叶绿素含量、根系活力等的影响。试验结果表明,在较低浓度水平下,黄腐酸钾可以显著提高黄瓜地下部干物质积累,增加根体积和根长,提高根系活力;高浓度的黄腐酸钾可抑制幼苗生长;而60~120 mg/L黄腐酸钾处理有利于培育壮苗。  相似文献   

鳢肠对棉铃虫生长发育的影响     

王莹莹  任相亮  姜伟丽  马亚杰  胡红岩  王新玲  李倩  马艳 《中国棉花》2016,43(7):16-19

通过饲料混毒法测定鳢肠对棉铃虫生长发育的影响。结果表明,随饲料中鳢肠比例的加大和棉铃虫幼虫取食时间的延长,鳢肠对棉铃虫幼虫的生长发育具有明显的抑制作用。幼虫取食鳢肠比例高的饲料后,棉铃虫蛹质量显著降低,但羽化率和单雌日均产卵量与对照处理差异不显著;给棉铃虫幼虫饲喂鳢肠明显延长了幼虫和成虫历期,但对蛹历期的影响较小。  相似文献   

基于多阶段预报分布的贝叶斯多变量均值向量监控模型     

朱慧明  管皓云  林静  虞克明  曾昭法 《湖南农业大学学报(自然科学版)》2011,38(3):82-86

考虑了一类具有多个时间点重置执行价格的欧式熊市（或牛市）重置权证定价.应用鞅定价方法和多维正态分布函数，得到了该类权证价格的显示解和Δ对冲策略，推广了Gray和Whaley的单时点重置权证定价模型.  相似文献   

Effect of Momordica charantia Fruit Aqueous Extract on Serum Lipids Metabolic Disorder in Restraint Mice     

TANG Qin  DENG Yuan-yuan  ZHANG Rui-fen  ZHANG Yan  ZHANG Ming-wei  WEI Zhen-cheng  TANG Xiao-jun  LIU Lei  TI Hui-hui  MA Yong-xuan 《中国农业科学》2014,47(16):3300-3307

  相似文献   

6307E深沟球轴承开裂原因分析     

岳渊渊  杨永生  刘岩  杜冈峰  刘耀辉 《拖拉机与农用运输车》2015,(3):55-57

对装配过程中发生开裂的6307E深沟球轴承,采用宏观观察、显微观察、硬度检测、扫描电镜观察、能谱微区成分分析等手段,并结合装配工艺进行了综合分析。分析结果表明,6307E深沟球轴承开裂处显微组织正常、硬度符合技术要求、化学成分正常且无原材料缺陷,裂纹处存在明显的氧化特征,可知该裂纹为轴承装配前就存在的淬火裂纹。  相似文献   

Identification of Differentially Expressed Genes and Lipid Metabolism Signaling Pathways between Muscle and Fat Tissues in Broiler Chickens     

Min Zhang  Dan Zheng  Zhimei Peng  Yuting Zhu  Rongrong Li  Qiong Wu  Yan Li  Hongyi Li  Weihua Xu  Mao Zhang  Qichun Hung  Yanfa Sun 《The Journal of Poultry Science》2021,58(2):131

In this study, signaling pathways and key differentially expressed genes (DEGs) involved in lipid metabolism in muscle and fat tissues were investigated. Muscle and abdominal fat tissues were obtained from 35-day-old female broilers for RNA sequencing. DEGs between muscle and fat tissues were identified. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses of DEGs were performed. A total of 6130 DEGs were identified to be significantly enriched in 365 GO terms, most of which were involved in biological processes, cellular components, and molecular functions in muscle and fat tissues. Three important lipid signaling pathways (pyruvate metabolism, the insulin signaling pathway, and the adipocytokine signaling pathway) were identified among the fat and muscle tissues of broilers. The key common DEGs in these pathways included phosphoenolpyruvate carboxykinase 2 (PCK2), acetyl-CoA carboxylase 1 alpha and beta (ACACA and ACACB), and the mitogen-activated protein kinase (AMPK) gene family. Hence, our findings revealed the pathways and key genes and gene families involved in the regulation of fat deposition in the muscle and fat tissues of broilers.  相似文献   

Effect of L-lysine Added in Diluent on the Fresh Semen Quality of Dorper Sheep     

MAO Ran  LI Qing-quan  SHI Yan  LAN Xiang-li  WANG Min  ZONG Ze-jun  XIA Guo-zhong  HAN Tian-long 《中国畜牧兽医》2015,42(12):3308-3314

In order to explore the effect of different L-lysine levels added in semen dilution on the fresh Dorper sheep quality stored at liquid state,3 health Dorper ram were used to collect semen which were equal-packaged and added to solution containing different levels (0,0.1,0.2,0.3,0.4 and 0.5 g) L-lysine in 120 mL diluent and at 0,6,24,30,48,54,72 and 78 h,the sperm motility,membrane integrity and acrosome integrity were detected.The results showed that the sperm motility in groups added 0,0.1 and 0.2 g L-lysine were higher than other groups,and that in 0.4 and 0.5 g L-lysine groups decreased faster than other groups;The sperm motility in 0.5 g L-lysine group reduced to 0 at 30 h,and it reduced to 0 at 48 h in the group added 0.4 g L-lysine;The effective survival time and survival index in the group added 0.1 g L-lysine was higher than other groups (P< 0.05);The membrane integrity of 0.1 g group was the highest,that had no significant difference with control group from 0 to 54 h (P >0.05),while after 72 h the two groups had significant differences (P< 0.05).The membrane integrity in 0.4 and 0.5 g groups were the worst,and that was significant different with other groups (P< 0.05);The acrosome integrity of 0.1 g group was the highest which had no significant difference with control group (P >0.05),0.4 and 0.5 g groups were the worst,the difference between them was not significant (P >0.05),while was extremely significant difference with other groups except for 0 and 6 h (P< 0.01).The results suggested that dilution added a high concentration of L-lysine could inhibit sperm quality,when the count of L-lysine was more than 0.2 g,sperm quality was significantly decreased,adding 0.1 g L-lysine could improve Dorper sheep fresh sperm quality stored at liquid state.  相似文献   

蝴蝶兰切花花被不同开放阶段酶活性的变化     

蒋素华  张燕  牛苏燕  杨旭东  王喜蒙  崔波 《北方园艺》2021,(2):85-90

以蝴蝶兰鲜切花为试材,对切花花被不同生理阶段3种酶活性的变化进行测量分析,以期为蝴蝶兰切花寿命的延长提供参考依据。结果表明:萼片和花瓣中的过氧化物酶(POD)从花苞期到半开期酶活性变化不明显,从半开期到衰老期酶活性显著升高。花瓣中的超氧化物歧化酶(SOD)从花苞期到半开期酶活性升高,从半开期到衰老期酶活性显著降低;萼片中的超氧化物歧化酶活性变化不显著但也呈先上升后下降趋势。花瓣中的中性蛋白酶(NP)从花苞期到半开期酶活性呈上升趋势,半开期到盛开期呈下降趋势,盛开期到衰老期呈上升趋势;花萼中的中性蛋白酶从花苞期到盛开期酶活性呈下降趋势,从盛开期到衰老期呈上升趋势;总体来看中性蛋白酶的活性呈先下降后上升趋势。  相似文献