Susceptibility of cats to equine morbillivirus   总被引：7，自引：0，他引：7  

HA WESTBURY  PT HOOPER  SL BROUWER  PW SELLECK 《Australian veterinary journal》1996,74(2):132-134

Objective To assess the susceptibility of cats to equine morbillivirus (EMV) by direct administration of the virus by subcutaneous, intra-nasal or oral routes, and following exposure to infected cats.
Design A disease transmission study, with controls, using ten cats.
Procedure Groups of cats were given the virus by the designated methods and assessed for evidence of infection by clinical examination, plus pathological and virological tests.
Results All cats administered the virus by subcutaneous, intra-nasal or oral routes became infected and developed the disease within 4 to 8 days. One of two cats in contact with affected cats also developed the disease, but two cats kept near to affected cats did not become infected. The virus was isolated from a range of tissues collected from the infected cats, and the lesions observed in affected cats were similar to those previously observed in horses naturally and experimentally infected with the virus.
Conclusion This is the first demonstration that animals can be infected with EMV by non-parenteral means, that the virus can transmit naturally between animals and confirms other reports of the similarity of EMV disease in horses and cats.  相似文献   

草坪草种(品种)的筛选及利用   总被引：3，自引：0，他引：3  

额木和  哈斯其其 《草原与草坪》2000,(3):12-14

以绿色期、质量、抗逆性及建植效率为指标 ,对国内外的优良草坪草进行了引种筛选工作。筛选出了适宜内蒙古气候条件的 9个品种 ,培育出了冷季型草坪草品种—大青山草地早熟禾。同时对优良的地被植物进行了引种驯化  相似文献   

烷基锡酸催化松香酯化反应的研究   总被引：16，自引：5，他引：11  

常东亮  哈成勇  袁金伦 《林产化学与工业》1999,19(3):21-24

以松香树脂酸的酯化反应为例，研究了烷基锡酸为酸化反应的催化作用，系统的探讨了影响反应的各种因素，研究表明烷其锡酸具有很高的催化活性，可以高效地催化合成系列松香酯，大大缩短了反应时间。  相似文献   

都市型薄皮甜瓜品种比较试验     

张静  哈雪姣  贾文红  乔媛媛  郝敬虹  李婷 《蔬菜》2021,(4):69-72

为筛选出适宜在北京种植的优质都市型薄皮甜瓜品种,选取8个品种的薄皮甜瓜为试验材料,对比分析其田间长势及果实品质。结果表明:8个参试品种田间长势及果实品质均有显著差异,其中梨形瓜中丘比特果实大,外观好,果肉最厚,心糖最高,综合果实品质最优秀;长筒形瓜中博洋9号果实外观及品质较优秀,单果质量最大,果形指数好,心糖最高。综合看来,丘比特和博洋9号这2个品种可在北京地区进一步推广种植。  相似文献   

富含硒钴锌的苜蓿青干草在牛羊饲喂中的效果     

李明  哈斯  介晓磊  郭孝  李建平  蒋士传 《家畜生态》2011,(4):34-37

通过在荷斯坦奶牛和杜泊羊日粮中添加5%高硒型、高硒钴型、高硒钴锌苜蓿青干草,研究3种苜蓿青干草对牛羊饲料转化和生产特点的影响。结果表明,功能型苜蓿青干草能够显著提高牛羊的饲料转化率,其中高硒钴和高硒钴锌苜蓿青干草有利于提高羊和牛的日增重,而高硒型青干草有利于提高荷斯坦奶牛的产奶量。  相似文献   

鸡公山自然保护区森林植被生物量及活碳蓄积量研究   总被引：3，自引：0，他引：3  

严茂超  杨柳春  李海涛  胡聃  张照喜  杜化堂  哈德龙 《河南林业科技》2004,24(4):1-4,6

运用鸡公山科学考察资料及1999年森林资源清查资料,采用森林材积源生物量推算方法研究了鸡公山森林植被生物量及其活碳蓄积量。结果表明:鸡公山森林植被生物量总值为309 202t,平均森林植被生物量为111.7t／hm2,高于全国平均水平(77.4t／hm2);鸡公山森林植被的总活碳蓄积量为154 601t,平均活碳密度为56MgC／hm2,高于中国森林植被活碳密度的平均水平(38.7 MgC／hm2),但低于全球平均碳密度(86MgC／hm2)。不同林型活碳蓄积密度分析结果表明,马尾松、杉木和栎类林木的活碳蓄积密度分别为30MgC／hm2,39 MgC／hm2和70MgC／hm2,均高于全国同类型森林植物的活碳蓄积密度的平均值,而次生阔叶混交林的碳蓄积密度略低于全国平均水平。鸡公山自然保护区67％的森林为中龄林,27％的森林为幼龄林,在增加碳蓄积方面还有巨大的潜力。  相似文献   

Frequency Hydraulic Aperture about Fracture Seepage in Rock Mass     

XU Guang xiang  HA Qiu-ling  ZHANG Yong xing 《保鲜与加工》2001,(5):50-55

The frequency aperture given in this paper is a new method that describes the fracture aperture composition. The aperture curve plays a role in describing the aperture distribution and uniformity. In particular, the frequency hydraulic aperture is of great importance in seepage analysis. It overcomes limitations of hydraulic aperture and mean aperture. Based on existing information, the result of example calculation shows that the hydraulic aperture e h equals to the median aperture e 50 . This paper also obtains that the frequency hydraulic aperture e sh equals to e 48 through finite element numerical modeling for various type of random fracture.  相似文献   

Connect Technique of Laminated Object Manufacturing Using Metallic Materials as Modeling Materials     

YI Shu ping  HA Jin  LIN Li hong  ZHANG Jin 《保鲜与加工》2002,(2):1

To solve some key problems existed in the manufacturing of metallic functional part via Laminated Object Manufacturing (LOM), a new technique using vacuum solid-state pressure diffusion weld technique to connect the metallic slice sheets is presented in this paper. The following conclusions can be draw from the experiments introduced specially: the size in the stack direction shrink at the rate of less than 1% and the shrinking is owed to regularly error, the atom-diffusion between two combined interface occurred clearly and new crystallites shaped meanwhile, shearing intension of well connected diffusion section is more than 100 MPa and micro hardness of well-knit portion is the same to matrix's. It can be proved from the result above that the vacuum solid-state pressure diffusion technique weld is a perfect technique for connecting metallic slice sheets used in the manufacturing of metallic functional part via LOM.  相似文献   

糖水龙葵果罐头制作工艺研究     

韩天龙  金明晓 《保鲜与加工》2006,6(2):33-34

通过单因素多水平、多因素多水平的正交实验对龙葵果实罐藏工艺进行研究,结果表明,加工条件为烫漂温度60℃,烫漂时间10min,糖水浓度60%,排气温度40℃,排气时间15min.在此条件下罐头产品感官与品质最佳.  相似文献   

动物溶菌酶基因的研究进展   总被引：1，自引：0，他引：1  

孙国庆  哈福  苗永旺  李大林 《中国牛业科学》2012,38(3):51-54,59

溶菌酶[Lysozyme(EC3.2.1.17),LYZ]是机体先天免疫系统中一个重要的效应分子,参与机体多种免疫反应,在溶菌过程中形成一个水解体系,破坏和消除侵入动物体内的病原,从而实现机体的免疫防御。它可以有效抑制葡萄球菌、大肠杆菌等一系列病原菌,是重要的奶牛乳房炎抗性因子之一。本文综述了溶菌酶基因的研究进展,包括其结构与进化、变异及应用前景等。  相似文献