黄芪多糖对鸡抗病能力的影响

黄芪多糖是一种从豆科类植物黄芪或膜荚黄芪的根茎中提取而来的水溶性多糖成分,具有祛湿、抗病毒、抗氧化、抗辐射、增强免疫力等多种生物学作用,也可以作为免疫增强剂和免疫佐剂,在增强鸡的免疫力方面发挥了重要作用。本文综述了黄芪多糖对鸡抗病能力的影响及其作用效果的影响因素和今后的发展方向,为黄芪多糖在鸡生产中的应用研究提供参考。     

低能量氦氖激光照射对荷瘤小鼠NK细胞活性的影响

研究低能量氦氖激光照射荷瘤小鼠对ＮＫ细胞活性的影响。选取ＢＡＬＢ／Ｃ雄性小鼠腹腔接种Ｓ１８０,接种后进行激光照射小鼠内眼角,监测了正确对照组,肿瘤对照组和７．３３、１１．００、１４．６７、２２．００、２９．３３Ｊ／ｃｍ＾２五个激光照射线能明显提高荷瘤小鼠ＮＫ细胞活性;７．３３、２９．３３Ｊ／ｃｍ＾２照射组则长高不明显。     

金水乌鸡黑羽丝毛系选育报告

用黑羽黑皮的江汉鸡对白羽丝毛乌骨鸡先导入杂交后闭锁群继代选育,培育出金水乌鸡黑羽丝毛系.黑羽丝毛系90日龄体重1kg以上,料肉比3.36:1.     

鸡传染性法氏囊病快速诊断试纸的研制

本文简述用胶体金免疫层析技术,构建鸡传染性法氏囊病快速诊断试纸。试纸主要由测试端、显色区和手柄端3部分构成,能在很短的时间内完成对鸡传染性法氏囊病的诊断,且无需任何仪器设备,具有简便、快速、敏感、特异的特点。     

Gly-Gly肽和Gly-L-Leu肽在蛋鸡肠道内水解的研究

采用蛋鸡离体外翻肠段培养法,将小肠分为十二指肠、空肠前段、中段、后段和回肠五个部位肠段,洗净外翻。2种二肽培养液(Gly-Gly肽和Gly-L-Leu肽溶液)作为两组对照培养液,每种二肽培养液中添加肽酶抑制剂(Bestatin和Amastatin),作为试验培养液,39.5℃培养25min,每5min取样一次,测定培养液中的二肽含量。结果表明,培养5min后,含Gly-Gly肽的对照和试验培养液中均未能检测到完整Gly-Gly肽。而含Gly-L-Leu肽的对照培养液Gly-L-Leu肽的含量降低到16.75％,试验培养液则下降到43.40％。而试验培养液中Gly-L-Leu肽的含量10min后无显著降低(P>0.05)。各培养时段试验培养液Gly-L-Leu含量均显著高于对照培养液(P<0.05)。由此认为,离体肠囊在培养过程中能够迅速释放肠肽酶及一些生物活性物质,快速水解2种二肽。肽酶抑制剂(Bestatin和Amastatin)能抑制Gly-L-Leu的水解,但不能抑制Gly-Gly的水解。     

HPLC-PDAD法检测3种中兽药散剂中违规添加4种喹诺酮类药物的研究

为了建立检测中兽药散剂中违规添加氧氟沙星、诺氟沙星、环丙沙星、恩诺沙星4种喹诺酮类药物的反相高效液相色谱法（HPLC-PDAD）,采用Atlantis T3（十八烷基硅烷键合硅胶．4．6min×250mm,5μm）色谱柱,流动相为磷酸溶液：乙腈：甲醇（85．5：7.0：7．5）,流速为1．0mL／min。检测波长为283nm。4种喹诺酮类药物检查方法的线性关系良好,r〉0．9999;回收率均在98．4％～104．6％范围内,RSD均在0．9％～2．3％之间;4种喹诺酮类药物在肥猪散、健胃散、银翘散3种中兽药散剂中的检出限均为200mg／kg。该方法可用于中兽药散剂中违规添加喹诺酮类药物的检测。     

新近发现的非典型疯牛病介绍

2004年2月《美国科学院院刊》报道了Monaco等人在2003年8月份在意大利发现的一种非典型BSE。这种非典型：BSE比人们以前所认识到的：BSE(以下称“典型BSE”)更像人CJD。     

A short note on the horizontal and vertical movements of a whale shark, Rhincodon typus, tracked by satellite telemetry in the South China Sea

Whale sharks, a global migratory species, are often reported entangled in fishing nets in coastal areas of China. The effectiveness of conservation measures has been constrained by very limited knowledge on their movements and preferred habitats in the coastal areas of China. For the first time, we tracked the movements of 2 whale sharks by satellite telemetry in Mainland China. The tracking results of 1 whale shark revealed that it travelled in the South China Sea in a south-eastern direction, parallel to the eastern coast of Vietnam. Total distance travelled was 1018 km, in approximately 74 days, with a mean speed of 14 km per day. It appeared to head towards the cool upwelling zones in southern Vietnam at the time of the tag's detachment. In our study, it was observed that this whale shark was a surface dweller and spent approximately 45% of its time above 10 m water depth and 90% of its time above 50 m depth. It also tended to stay in water temperatures between 27 and 30 °C, and was rarely recorded in water below 20 °C. This preliminary study indicates the importance of shallow waters as the foraging habitat for whale sharks, and has implications for their management and conservation.     

检疫犬基地建设与发展策略探讨

检疫犬应用技术作为一种特殊的检验检疫手段,目前已被30多个国家或地区应用于检验检疫领域。许多国家或地区已建有自己的国家级工作犬训练基地。近年来,由于出入境业务量的迅速增长,我国对检疫犬数量的需求逐年攀升,明确要建成2个国家级检疫犬繁殖训养中心。检疫犬基地作为培养检疫犬的重要场所,其基地面积、位置规划、人力资源、种犬储备、幼犬来源等的科学合理规划,对保证其可持续发展具有重要意义。检疫犬基地的可持续发展,需要准确定位功能需求,搞好种犬繁育,统筹储备人力资源,建设生态环保基地,挖掘和利用社会资源,以及拓展其它功能建设,从而做到行业引领。