排序方式: 共有21条查询结果,搜索用时 15 毫秒
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为研究不同剂量γ-氨基丁酸(γ-aminobutyric acid,GABA)与诺达苷肽对4周龄断奶仔猪应激性腹泻的治疗效果,分别采用了预防试验和治疗试验、观察增重等方法进行验证。结果显示预防试验中GABA(Ⅰ组)、诺达苷肽(Ⅱ组)、GABA结合诺达苷肽(Ⅲ组)的预防率分别为80.0%、90.0%、93.3%;治疗试验中,Ⅰ组、Ⅱ组、Ⅲ组的治愈率分别为92%、96%、79%。结果表明GABA结合诺达苷肽可有效治疗断奶仔猪应激性腹泻。 相似文献
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<正>本刊讯日前,华北地区的首条苹果无损测糖探伤生产线正式落户万荣县华荣果业有限公司。据悉,该公司是一家集果品收购、出口、保鲜、贮藏基地服务为一体的山西省苹果出口龙头企业。2014年以来,该公司专程从法国迈夫诺达机械设备有限公司引进法国Genesis苹果无损测糖探伤全自动选果生产线,该生产线采用脉冲、光谱图像等先进技术,自动检测苹果糖 相似文献
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罗氏沼虾主要病害及防治技术 总被引:1,自引:0,他引:1
一、白体病病原:浙江省淡水水产研究所钱冬等研究认定为罗氏沼虾诺达病毒。该病的主要症状是体色变白。发病初期病虾出现几块小白斑,然后由后向前扩展,腹部肌肉呈现白色、混浊,甚至整个虾体除头部外均发白。发病初期大部份病虾尚能摄食、蜕壳,但逐渐活动减弱,摄食下降,如不及时防治,死亡率较高。流行:该病在我市是近年来发生的新病,每年不断;发病最为严重的是2001年,发病面积1.5万亩,占当年养殖总面积的30%左右。发病时间一般为每年的4~6月,尤以塑料大棚加温培育幼虾阶段为主;5月中、下旬幼虾放大池养殖后,病情逐步好转。该病主要由虾苗带… 相似文献
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正鲁清贵和潍坊诺达药业有限公司鲁清贵,原山东省青州市畜牧局副局长,在任期间主要从事畜禽疫病防治技术推广和动物卫生监督管理工作,主持开发了多项畜禽疫病防治新技术、新产品,多次受到农业部表彰。同时,鲁清贵对中兽医在当前养殖业中的应用颇有研究,长期致力于中兽医药的推广。2001年,在招商引资项目后参与企业管理。2005年3月,潍坊诺达药业有限公司(以下简称"诺达")正式成立, 相似文献
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鱼类诺达病毒及其所导致的疾病 总被引:1,自引:1,他引:1
In recent years, piscine nodaviruses have emerged as major pathogens of a wide range of larval and juvenile marine finfish resulting in high mortality in aquaculture worldwide. Affected fish exhibit a range of neurological signs, such as erratic swimming behaviour with the associated microscopic lesions of necrosis and vacuolation of the central nervous tissues and retina. Numerous roundshaped, unenveloped and 25-30 nm in diameter virus particles were found in the cytoplasm of affected retinal and nerve cells. Nodaviruses have a bipartite genome of positivesense RNA,with RNA1 encoding the RNAdependent RNA polymerase and RNA2 encoding the capsid protein. Both RNA are capped, but not polyadenylated. The family Nodaviridae comprises two genera: Alphanodavirus and Betanodavirus, members of which primarily infect insects and fish, respectively. Therefore, betanodavirus is also named piscine nodavirus. At present, piscine nodaviruses are divided into four genotypes based on partial sequences of the coat protein gene. ELISA and RT-PCR amplification have been developed as specific diagnostic methods for the d
etection of the virus. Antibodies to striped jack (Pseudocaranx dentex) nervous necrosis (SJNNV) were found in 65% of plasma samples collected from wild and domestic brood stocks of striped jack, suggesting that the virus is
very prevalent. Viral antigens were detected in eggs, larvae, and ovaries of hatcheryreared and wild spawner fish, suggesting both horizontal and vertical modes of transmission of the virus. Selection of nodavirusfree spawners using ELISA for detection of antigens and RT-PCR techniques have successfully reduced incidences of the virus infections in juvenile sea bass (Dicentrarchus labrax),striped jack and barfin flounder (Verasper moseri). The SSN1 and GF cell lines have been successfully used in isolating piscinenodaviruses.Although there are many papers describing the molecular characteristics of betanodavirus, our knowledge of the genomic attributes of these viruses is still limited. Vaccination studies are being undertaken by a number of researchers and need to be fostered. In particular, the use of passive immunization of broodfish with homologous and heterologous, high titre antisera are worthy of investigation. 相似文献
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鱼类病毒性神经坏死病研究现状 总被引:5,自引:0,他引:5
鱼类病毒性神经坏死病是近年来严重危害海水鱼类,引起暴发性流行的重大病害之一。目前,已知受神经坏死病毒感染的鱼类达40多种。该病毒包括4 种血清型,即红鳍东方鲀神经坏死病毒、拟鲹神经坏死病毒、条斑星鲽神经坏死病毒、赤点石斑鱼神经坏死病毒。患病鱼常表现出游泳异常,身体失去平衡等典型神经性疾病症状。病理组织学观察可见中枢神经系统特别是脑和视网膜出现严重的坏死、空泡化。病毒可通过垂直和水平两种途径传播。关于病毒的命名、感染机制及其防治还需深入研究。 相似文献
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罗氏沼虾诺达病毒单克隆抗体的制备及应用 总被引:1,自引:0,他引:1
罗氏沼虾肌肉白浊病(whitish muscle disease of Macrobrachium rosenbergii)是一种发生在罗氏沼虾苗种阶段的流行病,发病虾苗出现肌肉白浊、白斑或白尾症状,死亡率高达60%以上,作者所在实验室在确定其病原是罗氏沼虾诺达病毒(Macrobrachiium rosenbergii Nodavirus,MrNV)的基础上,用MrNV免疫BALB/c小鼠,取小鼠脾细胞与SP2/0鼠骨髓瘤细胞融合,用间接ELISA筛选阳性孔,经有限稀释法克隆,得到12株能特异分泌抗MrNV的单兜隆抗体(Mab)的杂交瘤细胞。注射小鼠,制备腹水单克隆抗体,ELISA效价为1:10^5~10^6。亚型鉴定结果表明,有6株单抗为IgG1型,4株甲抗为IgG2a型,2株单抗为IgG2b型。12株单抗与对虾白斑综合征病毒(WSSV)和桃拉综合征病毒(TSV)均无交叉反应:挑选效价高的腹水单抗2B5,建立了检测罗氏沼虾诺达病毒的三抗体夹心酶联免疫吸附测定(TAS—ELISA)法,该方法检测灵敏度达0.98ng左右。Wesrtem blot分析表明,2B5能与MrNV 43kD的外膜蛋白特异性结合。 相似文献