安定和鹿安宁对应激梅花鹿某些血液指标的影响

将 30头试验鹿随机分为 3组 ,Ⅰ组为对照组 ,Ⅱ、Ⅲ组为试验组 ,分别在日粮中添加 5 0mg/kg安定和 10 0IU/kg鹿安宁。观测保定—锯茸应激状态下 ,梅花鹿血液白细胞的数量和组成、血浆总糖皮质激素、皮质醇浓度及淋巴细胞糖皮质激素受体含量的变化。结果表明 ,安定和鹿安宁均可显著提高应激鹿血液白细胞总数 (P <0 0 1) ,鹿安宁可使之趋于正常 (P >0 0 5 ) ;安定和鹿安宁均可显著提高应激鹿血液中淋巴细胞百分率 (P <0 0 1) ,降低N/L值 (P <0 0 1)。安定和鹿安宁可显著降低应激鹿血浆总糖皮质激素、皮质醇浓度 ,提高应激鹿血液淋巴细胞糖皮质激素受体含量 (P <0 0 1)。综合比较 ,鹿安宁的作用效果较安定好     

迪卡配套系猪RYR1的PCR分析及其利用的研究

试验从鸡东县永安猪场随机抽取迪卡配套系猪B系和E系42头，通过PCR扩增技术和酶切鉴定．采用克隆技术进行测序，来检测是否含有氟烷基因序列。经过以上技术检测这42头猪均没有氟烷基因。     

热应激对动物生殖机能的影响及其作用机理

温度对动物生殖机能具有重要的影响,本文分别阐述热应激对雌性动物发情、受胎率、胚胎成活率、产仔数以及对雄性动物繁殖性能的影响,并提出了热应激对动物生殖机能影响的可能作用机理。     

变截面构件的剪应力计算

变截面构件的弯曲变形是实际构件常见变形之一，现行钢筋混凝土设计规范提供的和实际设计计算应用的剪应力计算公式未考虑截面变化的影响，有较大的误差。本文用材料力学方法推出考虑变截面影响的剪应力计算公式，以便在实际设计计算应用。     

NaCl胁迫对4种豆科牧草萌发的影响

为研究盐渍化对4种牧草种子盐胁迫下发芽成苗的影响,探索不同牧草种子盐胁迫下的萌发表现,试验借鉴农作物研究的理论和方法,并在实验室条件下用不同浓度的NaCl溶液对种子进行处理,并观察其萌发特性,以期为生产实践提供有用的依据,减少在生产中的损失,提高草业生产的经济效益。1     

香菇干制微机监控系统研究

本文研究香菇干制过程的计算机控制。在研制了系统硬件之后,根据实验结果,确定了控制对象的广义数学模型,用飞升曲线法求取模型中各参数。用计算机仿真技术对几种常用的算法进行比较,得出了采用大林算法的控制方案。     

低氧胁迫下黄瓜幼苗根系多胺代谢的变化

 利用外源Spd、PAO 抑制剂研究了黄瓜幼苗根系在低氧水培时的生长状况以及内源PAs、H₂O₂ 含量和PAO活性的动态变化。结果表明, 外源PAs对低氧胁迫下黄瓜幼苗根系的生长有促进作用;低氧处理后3种PAs含量都明显上升, 外源Spd和PAO抑制剂增加了根系中的PAs含量, 降低了根系中H₂O₂ 含量, 减缓了低氧伤害; PAs为低氧胁迫的应激产物, PAO为适应酶类, 其活性随PAs含量的变化而发生变化。     

Effects of Acclimate™ on the frequency and duration of aggressive sequence and growth performance in co-mingled, weaned pigs

Co-mingling weaned pigs often results in aggressive behavior which can result in injury and reduced performance. This experiment examined the effect of Acclimate™, a product reported to reduce equine aggression, on weaned pig aggression and growth performance. Weanling pigs (n=214, avg. wt.=5.93 kg) were blocked by weight, sex and litter (n=25) and randomly assigned to either Acclimate™ treatment or a control group. Acclimate™ treated pigs were marked on the nose, face and neck. Pigs were individually identified and videotaped to determine frequency of aggressive sequence (FAS) and duration of aggression (DOA) on an individual pig basis. Pig weights and feed consumption were used to determine feed intake, total weight gain (TWG), average daily gain (ADG) and feed to gain ratio (F/G). Differences between litter, sex and treatment for FAS, DOA, F/G and ADG were tested using GLM, SAS. Neither Acclimate™ treatment or sex had a significant effect on FAS, TWG or F/G. However, there was a trend towards reduced duration and intensity of aggression in Acclimate™ treated pigs (p=0.1). There was a significant effect of litter (p<0.01) and TWG (p<0.001) on FAS at both 1 and 3 weeks. Acclimate™ treatment of weaned pigs does not decrease FAS, but may decrease the intensity and duration of aggression without negatively effecting growth.     

椪柑萎缩型枯水病和粒化型枯水病几种生理指标差异的研究

分析了椪柑萎缩型枯水与粒化型枯水以及正常果的生理差异。发现萎缩型枯水果的失重、呼吸速率显著高于粒化型枯水果,但其果肉水势和出汁率显著低于粒化型枯水果和正常果;萎缩型枯水与粒化型枯水一样,其脱落酸大量积累,14C-葡萄糖大量转化为不溶性物质。认为萎缩型枯水机理在于椪柑果实大量失水引发了逆境生理代谢,导致大量可溶性营养消耗,汁胞萎缩崩溃。