落叶果树休眠期管理技术措施     

黄新忠 《福建果树》2005,(1):50-50

进入休眠期，各种病菌和害虫以不同方式、形态潜伏于隐蔽场所越冬，发育阶段较一致，场所较集中、稳定，便于消灭；树体抗性较强，防治方法简便易行，并能起到一方多治、事半功倍的效果，为消灭或减少翌年初侵染及为害来源的关键时期。  相似文献   

甲酸钙的合成、测定及其在乳猪料中的应用   总被引：2，自引：0，他引：2  

黄建华  杨凤梅 《中国饲料》2005,(16):16-17

甲酸钙作为一种饲料添加剂,能降低和调节胃肠道pH值、促进营养物质的消化和吸收。本文系统介绍了甲酸钙的合成和检测方法,并介绍了甲酸钙作为饲料添加剂的作用效果。  相似文献   

Comparison of morphology, viability, and function between blood and milk neutrophils from peak lactating goats          下载免费PDF全文

Sui Zhi Tian  Chai Ju Chang  Chih Chi Chiang  Huo Cheng Peh  Mu Chiou Huang  Jai-Wei Lee    Xin Zhao 《Canadian journal of veterinary research》2005,69(1):39-45

The morphological features of blood and milk neutrophils from peak lactating goats were compared using light microscopy, scanning electron microscopy and flow cytometry in order to investigate the cytological changes of neutrophils after migration into the mammary gland. The kinetics of reactive oxygen intermediates (ROI) generation and gelatinase release of blood and milk neutrophils, with or without stimulation of phorbol 12-myristate, 13-acetate ester (PMA), were used to characterize their responses to inflammatory stimuli. Neutrophils isolated from goat milk were highly segmented and contained multi-lobed nuclei. Ultrastructurally, milk neutrophils were more ruffled on the surface compared to blood neutrophils. Approximately 30% of milk neutrophils were undergoing cell death, either necrosis or apoptosis, in contrast to 8% of blood neutrophils. The ROI production of activated milk neutrophils peaked earlier than blood neutrophils, but the duration and the intensity were much less. Neutrophils from both sources augmented the release of gelatinase in response to PMA (1 ng/mL). However, the amount of gelatinase released from milk neutrophils was lower (P < 0.05) than that of blood neutrophils. In summary, more neutrophils become apoptotic and necrotic in the mammary gland, presumably due to spontaneous aging, the process of diapedesis, and the interaction with milk components. Milk neutrophils have impaired functionalities in comparison with blood neutrophils. The information is relevant when studying mammary gland immunity and related diseases, such as mastitis.  相似文献   

大蚕、蛹组织切片核酸特异染色技术的探讨     

黄志君钟仰进  贺湘仁邓小娟  曹阳潘忠 《广东蚕业》2005,39(4):31-35

本文对大蚕、蛹的石蜡切片制作及其核酸特异染色方法进行探讨，针对虫体大和蛹体壁高度丁质化特点，对组织固定，脱水、透明、透蜡的时间相应的增加和固定前蛹皮剪开，在截位时要考虑切片段两头保留一段仅用来起保护作用的部分，并采用了二种核酸特异染色方法染色。结果表明：制片设计方案基本可行，部分细节需进一步改进；甲基绿-派罗宁（昂纳-帕彭海姆）染色法的切片组织颜色层次分明，DNA含量丰富的丝腺组织呈紫黑色，其它组织的DNA呈紫红色，RNA呈淡红色，改良的甲基绿一派罗宁染色法的切片组织颜色偏淡；孚尔根染色法的切片组织颜色层次分明，核酸呈紫红色，其它无色，能较好的以颜色的深浅来判断核酸的丰度。更理想的染色方案还有待进一步摸索。  相似文献   

莠去津原药中莠去津及主要杂质的气质联用分析研究     

黄修柱  季颖 《农药科学与管理》2003,24(3):8-10

本文通过采用气质联用(GC—MS)法对莠去津原药中莠去津及其它杂质进行分析鉴定，从而了解莠去津原药中的杂质情况和质量状况，用以指导工业生产。  相似文献   

枣新品种‘延川狗头枣’   总被引：4，自引：0，他引：4  

李新岗  刘玉忠  同金霞  黄建  高文海 《园艺学报》2003,30(2):247-247

 ‘延川狗头枣’为鲜食、制干兼用中晚熟枣新品种。果实大、卵圆形或锥形，似狗头状。单果平均质量18.7 g，最大25.4 g；果肉细脆，汁液中多，味酸甜；鲜食、干制品质优良。适宜平均气温10—11l℃ 、降雨量500 mm左右的北方地区栽培。  相似文献   

利用游离小孢子培养育成早熟大白菜新品种‘豫新5号’   总被引：5，自引：0，他引：5  

耿建峰  原玉香  张晓伟  蒋武生  韩永平  高睦枪  栗根义 《园艺学报》2003,30(2):249-252

 ‘豫新5号’是采用游离小孢子培养双单倍体育种技术选育的一代杂种，该品种生育期60 d，单球质量23 kg，球形指数1.35，高抗病毒病、霜霉病和软腐病，净菜产量56.7 t·hm^-2，可兼作早熟、晚熟栽培。  相似文献   

Characteristics for Practical Use of Attenuated Isolate UA-Fukushima of <Emphasis Type="Italic">Tomato mosaic virus</Emphasis>     

Tsutomu MATSUMOTO  Yuichiro NARA  Hiromitsu FURUYA  Harumi TAKAHASHI  Kiichi TAIRAKO  Hideki YAMAMOTO 《Journal of General Plant Pathology》2002,68(4):382-384

L₁₁A-Fukushima (L₁₁A-F) derived from attenuated isolate LuA of Tomato mosaic virus (ToMV) has the highest ability to cross protect against virulent ToMV among LuA and its derivatives and is stably inherited. Growth, yield, fruit quality and symptom attenuation of inoculated tomato plants did not differ significantly between L₁₁A-F and L₁₁A. The infectivity of progeny viruses in tomato infected with LuA-F was less than 4% of that with virulent ToMV. From these results, L₁₁A-F appears to possess the properties necessary for practical use. To manage L₁₁A-F strictly, a PCR-based assay to detect trace contamination of virulent ToMV in L₁₁A-F preparations was established. Received 10 June 2002/ Accepted in revised form 30 October 2002  相似文献   

Effects of Latent Infection of Stock Plants and Abundance of Thrips on the Occurrence of <Emphasis Type="Italic">Tomato spotted wilt virus </Emphasis>in Chrysanthemum Fields     

Shohei MATSUURA  Shigeru HOSHINO  Hideaki HAYASHI  Tetsuyuki KOHGUCHI  Kyoji HAGIWARA  Toshihiro OMURA 《Journal of General Plant Pathology》2002,68(1):99-102

DAS-ELISA proved to be reliable enough to detect a latent infection by Tomato spotted wilt virus (TSWV) in asymptomatic stock plants of chrysanthemum. A high density of Frankliniella occidentalis, the predominant vector, in the presence of latently infected stock plants resulted in a high incidence of disease in the chrysanthemum production field. The incidence of disease was low when the vector thrips were not abundant in spite of the presence of latently infected stock plants. These results suggest that an infestation of the vector thrips causes severe secondary spread of TSWV originating from latently infected stock plants in chrysanthemum production fields. Received 27 July 2001/ Accepted in revised form 27 November 2001  相似文献   

Colonization of winter oilseed rape tissues by A/Tox⁺ and B/Tox⁰Leptosphaeria maculans (phoma stem canker) in France and England     

J. S. West †  M.-H. Balesdent  T. Rouxel  J. P. Narcy  Y.-J. Huang  J. Roux  J. M. Steed  B. D. L. Fitt  J. Schmit 《Plant pathology》2002,51(3):311-321

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