难产是牛常见的产科疾病之一,奶牛发病率明显高于黄牛,对奶牛业造成较大的经济损失.奶牛难产时如果助产不当,可使难产奶牛失去繁殖能力而被淘汰,甚至造成母子双亡的严重后果.救治难产时,剖腹产是无法矫正胎儿或施以截胎术时待用的一种助产手术,是解决难产的重要手段.如能慎重果断地早期实施手术,加上熟练的手术技巧,成功率是很高的.
猪瘟和猪流行性感冒是猪的常见病,病发时外表症状大体相同,怎样区别猪瘟和猪流行性感冒呢?猪瘟是一种死亡率很高的猪病,潜伏期一般为5～7天,病发时外表症状是高烧40℃以上,背弓、嘴钻草窝,走路摇摆,部分病猪有眼屎,先下痢而后便秘,下腹部有明显的针尖状红斑点,最后卧地不起而死亡，目前国内尚无有效药物治疗猪瘟，做好早期诊断，及时采取措施，对控制和消灭猪瘟，减少经济损失有重要意义.猪流行性感冒潜伏期一般为2
Hemolin belongs to the immunoglobulin superfamily and plays an important role in innate immune response of insects.In this study,a hemolin-like cDNA of 1418 bp was obtained from Antheraea pernyi(Ap-he
Small heat shock proteins(sHSPs)can regulate protein folding and protect cells from stress.To investigate the role of sHSPs in the silk-producing insect Antheraea pernyi(A.pernyi; Lepidoptera: Saturni
Peptidoglycan recognition proteins(PGRPs)are conserved proteins in animals from insects to mammals and play an important role in immune response by recognizing peptidoglycan on microbial surfaces.
Trypsin-like serine protease(TLS)was a member of the chymotrypsin/trypsin superfamily enzymes.In order to research the function of TLS in Chinese oak silkworm Antheraea pernyi,TLS gene was cloned in t
Bivoltine tussah silkworm variety “Xuan Da No.1” was used to investigate the changes in embryo development in Antheraea pernyi.In this study,we collected the eggs at different embryonic development st
A small,multigene family encodes 4-coumarate:CoA ligases(4CLs)that catalyze the ligationof CoA to hydroxycinnamic acids,a branch point directing metabolites to flavonoid or monolignol pathways.In this
Although ethylene is well known as an essential regulator of fruit development,little work has examined the role ethylene plays in the development and maturation of mulberry(Morus L.)fruit.
Anthocyanins from mulberry fruits are used in medicine.However,little anthocyanin can be detected in other tissues and sometimes also mulberry fruits are colorless.The aim of this study was to investi