防病促生枯萎病拮抗菌“98-Ⅰ”对4种枯萎病防治效果研究

经 8年系统试验研究从 330个细菌菌株中筛选出 1株防病促生枯萎病拮抗菌“98 Ⅰ” ,经鉴定属蜡质芽孢杆菌。该菌对黄瓜枯萎病、西瓜枯萎病、青椒枯萎病和番茄枯萎病 4种土传病害均有显著防治效果 ,其平皿孢子萌发抑制率分别为 79 2 %、75 1%、72 3%和 95 7% ,且该菌对多种蔬菜有促生和促进种子发芽功效。     

基于文献计量的温病研究现状分析

目的：通过对1995-2010年温病研究文献进行分析揭示温病研究的现状。方法：采用频次分析法、共词聚类法、共词关联法、突发词监测等文献计量学方法分析了温病研究现状。结果：揭示了温病研究的热点疾病,潜在疾病与治法、研究方法和中医文献的关系。结论：发掘了新的研究热点和潜在的研究方向。     

Assessment of a point‐of‐care cardiac troponin I test to differentiate cardiac from noncardiac causes of respiratory distress in dogs

Objectives – To (1) determine a reference interval for cardiac troponin I (cTnI) using a point‐of‐care device in normal dogs and compare the results with those published by the manufacturer and (2) determine if cTnI differs among dogs with cardiogenic and noncardiogenic respiratory distress. Design – Prospective observational study. Setting – Emergency and referral veterinary hospital. Animals – Twenty‐six clinically normal dogs and 67 dogs in respiratory distress. Interventions – All dogs underwent whole blood sampling for cTnI concentrations. Measurements and Results – Normal dogs had a median cTnI concentration of 0.03 ng/mL (range 0–0.11 ng/mL). Thirty‐six dogs were diagnosed with noncardiogenic respiratory distress with a median cTnI concentration of 0.14 ng/mL (range 0.01–4.31 ng/mL). Thirty‐one dogs were diagnosed with cardiogenic respiratory distress with a median cTnI concentration of 1.74 ng/mL (range 0.05–17.1 ng/mL). A significant difference between cTnI concentrations in normal dogs and dogs with noncardiogenic respiratory distress was not detected. Significant differences in cTnI concentrations were found between normals versus cardiogenic and cardiogenic versus noncardiogenic respiratory distress groups. Significant differences in cTnI concentrations were identified in >10 when compared with the <5 and the 5–10 years of age groups. Receiver operating curve analysis identified cTnI concentrations >1.5 ng/mL as the optimal “cut‐off point” having a sensitivity of 78% and specificity of 51.5%. The area under the receiver operating curve was 0.72. Overall test accuracy was 65%. Conclusions – cTnI concentrations were significantly increased in dogs with cardiogenic respiratory distress versus dogs with noncardiogenic respiratory distress and normal dogs. A significant difference between normal dogs and dogs with noncardiogenic causes of respiratory distress was detected. Although highly sensitive when cTnI concentrations exceed 1.5 ng/mL, the test has low specificity. Assessment of cTnI by the methodology used cannot be recommended as the sole diagnostic modality for evaluating the cause of respiratory distress in dogs.     

奶牛繁殖疾病的调控

本文综述了奶牛繁殖疾病的发病原因和调控措施,分析认为奶牛的营养状况是影响奶牛繁殖力的重要因素。理想的奶牛管理应做到整个泌乳期始终监测奶牛的体况和奶牛日粮中微量元素的维生素的含量,避免营养素的不平衡而引发的奶牛繁殖障碍,同时应避免奶牛过肥或过瘦。适当补充某些维生素和矿物质十分重要。     

核酸适体及其在疫病诊断上的应用

核酸适体是指采用指数富集配体的系统进化技术从随机单链寡核苷酸库中筛选出的能与靶物质高特异性、高亲和力结合的配体。鉴于适体特有的亲和力高、特异性强、精确识别、易体外合成与修饰等特点,其被广泛应用于分析化学、基因调控、蛋白质组学和新药研发等领域。在疫病的检测方面,核酸适体逐渐成为抗体的代替或补充试剂,已初步应用于生物芯片、生物传感器、分子信标等多种检测技术平台,并具有良好的敏感性和特异性,显示出了良好的应用前景。本文就适体技术及其在疫病诊断中的应用进展作一综述。     

香石竹的三种病害

 报道云南香石竹3种病害,它们是香石竹灰斑病(Cladosporium echinulatum),香石竹黑斑病（Stemphylium sarciniiforme）和香石竹根结线虫病（Meloidogyne javanica）。     

木寡糖提高拟南芥抗病性

木寡糖是一种植物源寡糖,对动物体的生理功能多且显著,而其是否作为寡糖素诱发植物防卫尚不明确.本文分析了不同浓度木寡糖诱导拟南芥植株对不同营养型病原的抗性.结果表明,木寡糖能诱发拟南芥对半活体病原细菌丁香假单胞菌番茄致病变种、活体病原烟草花叶病毒和死体病原真菌核盘菌的抗性,且具有剂量依赖效应,随着木寡糖浓度的提高到100...     

贺兰山东麓‘蛇龙珠’葡萄病毒病种类鉴定及对采收期的影响

为摸清宁夏贺兰山东麓‘蛇龙珠’葡萄感染病毒种类,探究葡萄病毒病对果实品质及其采收期的影响。以‘蛇龙珠’葡萄为材料,通过RT-PCR方法鉴定‘蛇龙珠’葡萄感染病毒种类;利用主成分分析法(PCA)对葡萄果实各理化指标进行综合评价,确定罹病和无症状对照组葡萄的最佳采收期。结果表明：‘蛇龙珠’葡萄感染8种葡萄病毒,分别为GLRaV-1、GLRaV-2、GLRaV-3、GFLV、GRSPaV、GVA、GPGV和GINV,复合侵染严重;与对照组相比,罹病葡萄的SPAD值降低14.89%,净光合速率降低17.21%,叶片气孔导度降低37.77%,可溶性固形物降低19.36%,还原糖含量降低18.09%,糖酸比降低25.24%,滴定酸含量增加15.94%;通过主成分分析得到2020年度对照组葡萄的最佳采收期为9月20日,罹病葡萄的最佳采收期为9月27日。综上,‘蛇龙珠’葡萄感染8种葡萄病毒,病毒感染导致植株叶片光合作用下降,果实可溶性固形物、还原糖、单宁等物质积累降低,造成酿酒葡萄采收期推迟1周。     

樱桃主要病害及其防治措施探讨

樱桃(Cerasus Mill.)在湖北省内多地普遍种植,近年来发展成为一种新兴的种植产业,随着果园规模的扩大,樱桃上的病害不容忽视,通过对湖北省内樱桃上病害的调查,分析了为害樱桃叶部、枝干、根部、果实的主要病害的为害特性,并提出了切实可行的防治措施。     

黄瓜种质资源对黑星病的抗病性研究

对国内外280份黄瓜材料进行人工接种抗病性鉴定,结果表明,黄瓜对黑星病的抗性在症状上主要有两种表现形式:抗病和感病;根据抗性表现将黄瓜材料分为高抗、高感、中抗和中感4种类型。基本明确了我国种质资源材料对黑星病的抗病性的总体情况;鉴定筛选出部分高抗黑星病的抗病材料,为资源的利用和抗病品种的选育奠定了基础。