桑树试管苗生根因素研究

提高试管苗生根率是桑树快速繁殖的关键因素。本实验调查桑子叶试管苗在各种不同条件下的生根情况，探索桑树试管苗的最佳生根条件。实验表明，以1／2MS＋IBA1或1／4MS＋IBA1为基本培养基，肌醇浓度为0.15-0.3g/l，在光照强度2000LX，光照时间12小时，培养温度28℃的培养条件下，桑试管苗平均生根率可达98％，驯化后移栽的成活率在96％以上。     

三江源区人工草地中小型土壤动物群落特征及季节变化

为了解三江源区不同建植年限人工草地的中小型土壤动物群落特征及其变化动态,于2012年4-10月以极度退化草地“黑土滩”为对照,利用定位观测方法对其进行了7次调查。结果表明：共捕获各类中小型土壤动物标本4552只,隶属3门、8纲、23目、55科、65属;大类群中蜱螨目（Acarina）占41.39%,线虫类（Nemata）占26.24%,弹尾目（Collembola）占23.77%,其他类群仅占8.60%;中小型土壤动物群落组成与数量均有明显的季节变化,在4-10月均是先上升后下降,在7-8月均达到最高;其Shannon-Wiener指数、Simpson优势度指数和均匀度指数均随着建植年限的增加有显著增加趋势,土壤动物群落结构随着人工草地建植年限的增加愈加稳定,群落稳定性以2000年人工草地最为稳定。     

新疆乌鲁木齐市犬绦虫感染状况调查

为了解乌鲁木齐市的犬绦虫感染情况,对2012—2015年在乌鲁木齐市8个区(县)采集的17 710份散养犬粪便,采用直接涂片法和漂浮法进行检查,对绦虫卵进行计数,统计感染率。结果共检出阳性样品1 870份,感染率为10.56%;半农半牧型区县的犬绦虫感染情况较主城区区县严重;4年内各区县的犬绦虫感染率整体呈下降趋势。建议各区县落实"犬犬驱虫,月月投药"策略,加强对城市流浪犬的管理。     

基于“互联网+微信平台+移动执法”的动物卫生风险管理系统

广东省东莞市动物卫生监督所在"互联网+动物卫生监督"的总体思路下,将互联网技术应用于动物卫生监督管理领域,各级执法人员可通过手持终端,在动物检疫、流通监管、监督检查、无害化处理监管等方面实现高效执法,实时记录监管信息,自动统计各类数据,开展痕迹化可追溯管理,全面实施动物卫生风险评估工作。     

Isolation, characterization and in vitro mitogenic stimulation of peripheral blood lymphocytes from an American buffalo.

A rapid and reproducible method is described for the isolation and characterization of leukocytes from the peripheral blood of an American buffalo (bison). Centrifugation of the buffy coat cells on a Percoll gradient (1.079 g/mL) at 650 x g for 20 min resulted in the separation and high yields of pure viable leukocytes. The sheep erythrocyte-rosetting technique (ER) showed that 59% of the cells were ER+ (T lymphocytes). Fluorescein isothiocyanate (FITC)-conjugated peanut agglutinin and FITC-conjugated concanavalin A revealed 77% and 89% positive cells, respectively. The isolated leukocytes contained adherent accessory cells and functionally active T and B lymphocytes which proliferated in response to both T and B cell mitogens and to exogenous recombinant bovine interleukin-2 in the absence and/or presence of the thiol compound 2-mercaptoethanol.     

Detection of African swine fever virus antibodies by immunoblotting assay.

An immunoblotting assay has been adapted to detect antibodies against African swine fever virus. The electrophoretic transfer of proteins and the immunoreaction conditions were optimized, using 4 mA/cm2 of current intensity and 10 micrograms of soluble cytoplasmic antigen of infected cells per strip. Filters of polyvinylidene difluoride showed the highest capacity for protein absorption, but nitrocellulose filters showed lower backgrounds. The specificity and the pattern of the proteins induced by African swine fever virus that react with the antisera were determined in immunoblotting assay, IP30 being the most reactive protein.     

An assessment of residual ovine nematodes on pasture under maritime conditions.

Residual ovine nematode pasture infections were assessed by grazing groups of ewes and their lambs on permanent sheep and cattle pastures and by the use of tracer lambs. Ostertagia spp., Cooperia oncophora, Nematodirus spp., Chabertia ovina and Trichuris spp. eggs and/or larvae survived on pastures overwinter. Second generation Ostertagia larvae were present in greatest numbers on pasture during the latter part of August and early September. The failure of a significant build-up of Cooperia oncophora was attributed to negligible worm egg output of this species in sheep. A build-up of Nematodirus spp. on pasture was not detected in this study.     

鸽源支原体的分离鉴定

对来自武汉市郊某养鸽专业户及市场食用鸽共７０只采集口腔咽部粘膜拭子及其中１５只鸽子的气管、气囊和肺等材料进行了支原体的分离鉴定，其中口腔咽部拭子几乎１００％能分离到支原体，但均与细菌共存而不易纯化，其他部位均未分离到支原体。对已纯化的３４个分离物中的１９个进行了鉴定，用鸽支原体ＭＭＰ１株、鸽口支原体ＭＭＰ４株及鸽鼻支原体６９４株作为标准抗原制备抗血清，以代谢抑制试验进行了血清学鉴定。结果表明，所有分离物均能在修改ＦＭ－４培养基上生长，在固体培养基表面形成典型的“油煎蛋”状或“脐状”菌落；光镜下和电镜负染后观察，菌体多呈现球状、点状等多形态，经超薄切片后观察，菌体外无细胞壁包绕，仅有由３层单位膜构成的细胞膜结构，所有分离物在无醋酸铊及青霉素的培养基上连续传５代不回复为细菌形态，能在含有猪血清的培养基上生长，其中５株水解精氨酸而不发酵葡萄糖，１４株发酵葡萄糖但不水解精氨酸。经抗血清代谢抑制试验鉴定，前者为鸽支原体，后者为鸽口支原体。     

Pseudocyst of the spermatic cord of a gelding.

Clinical, echographic, and histopathological features of an unusual enlarging scrotal mass in a 5-year-old gelding are described. Echography of the scrotal mass in this case provided valuable information concerning the nature of the tissue present, and assisted in narrowing the differential diagnosis.     

离体桑叶在贮藏过程中的生理变化

试验表明，不同叶位的桑叶随着贮藏时间的延长，叶片含水率与叶绿素含量持续下降；可溶性糖和粗蛋白含量在前36h左右略有升高然后逐渐下降；丙二醛（MDA）含量与过氧化物酶（POX）活性稳定升高；超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性渐渐降低。从而表明，离体桑叶在贮藏过程中的生理变化是叶片的衰老，这种衰老与叶片本身的老熟程度关系不大。