松香酸酯用于中性施胶的研究   总被引：3，自引：0，他引：3  

班卫平  吴祖望 《林产化学与工业》1999,19(1):59-63

合成了４种松香酯用于中性施胶。探讨了松香酯结构与施胶性能的关系,研究了施胶条件对香酯施胶效能的影响。松香酯在中,碱性条件下表现了优良的施胶效率。  相似文献   

禽喘安对鸡霉形体与大肠杆菌合并感染的药效学研究   总被引：1，自引：0，他引：1  

胡功政  刘冰宏  班付国  靳国昌  张素梅  吴华 《东北农业大学学报》1999,30(2):181-185

研究了中药散剂禽喘安对鸡霉形体与大肠杆菌合并感染的药效学。结果表明,禽喘安按０．７５％,０．５０％拌料连续５天,对鸡霉形体与大肠杆菌合并感染具有显著疗效,治愈率分别为９２．５０％,９０％;试验结束时,试验鸡只的抗体反应阳性率分别为２５％,５０％,气囊平均损伤记分分别为０．３３％,１．３３％。  相似文献   

三七和三七根茎中糖类物质分析   总被引：3，自引：0，他引：3  

刘刚  刘育辰  鲍建才  张崇禧 《人参研究》2005,17(4):34-36

目的：测定三七和三七根茎中糖类物质的含量;方法：3,5-二硝基水杨酸法测定三七和三七根茎中的总糖和还原糖含量;结果：三七和三七根茎中总糖的含量分别为73．10％和39．61％,还原糖的含量分别为4．41％和3．60％;结论：三七和三七根茎中总糖含量较高,而且三七中总糖含量几乎是三七根茎的2倍。  相似文献   

Development of a quantitative polymerase chain reaction assay for the detection of skin fluke <Emphasis Type="Italic">Neobenedenia girellae</Emphasis> larvae from environmental water     

Yasuo Agawa  Kazuki Tani  Syuhei Yamamoto  Chihaya Hirano  Sho Shirakashi 《Fisheries Science》2016,82(5):827-833

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风廓线雷达资料在沈阳冰雹天气过程中的分析应用   总被引：2，自引：2，他引：0  

李典  李崇  班伟龙  吴宇童  孟鹏  张治 《中国农学通报》2015,31(2):243-248

本文利用风廓线雷达的基本产品、Micaps实况资料和区域自动站资料,对沈阳城区发生的一次冰雹天气过程进行分析,结果表明：此次冰雹是在冷涡背景下,高空存在横槽、逆温,触发的局地的强对流天气过程。降雹前高空由西北风转为偏西风,预示着横槽的到来,风廓线雷达对冷空气侵入的判别提前于常规观测资料。1000 m以下水平风的变化与降雹时间及强度有较好的对应。高空水平风速≥12 m/s的风速带在降雹前1h达到峰值。高空急流区在冰雹发生前20~25min出现急流动量下传,为冰雹的产生提供动力条件。降雹阶段探测高度明显增加,主要是由于空气湿度增大和高层存在大量冰晶粒子所致。冰雹过程中,冰晶粒子主要集中在1900 m以下。降雹前25min垂直风切变增大,并在降雹前20min达到极值,垂直风切变的变化与急流的变化相对应。垂直速度达到极值对应的并不是降雹的开始,低层信噪比＞60 dB,对应降雹开始,信噪比对于冰雹的敏感程度比垂直速度高。垂直速度大于4 m/s与降水的开始、结束时间有着很好的对应关系。  相似文献   

对分割肉检疫监管的探讨     

班曼曼  金喜新  贾广敏  张涛  马文涛  李杰如 《中国动物检疫》2017,34(3):54-55

公众对肉类产品的需求逐渐由白条肉向品牌化、精细化的分割肉方向发展,相关产品的检验、检疫、监管已成为社会关注的热点。本文对三种不同类型肉品分割行为进行了分析,探讨检疫监管存在的问题,并提出明确监管主体、修订相关法律法规、建立追溯平台、强化主体责任的建议,供同仁参考。  相似文献   

Intermediate derivatisation method in the discovery of new acaricide candidates: synthesis of N‐substituted piperazine derivatives and their activity against phytophagous mites          下载免费PDF全文

Yong Xie  Ying Xu  Changling Liu  Aiying Guan  Lanfeng Ban  Fei Ding  Wei Peng 《Pest management science》2017,73(5):945-952

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Pigment composition patterns and expression analysis of flavonoid biosynthesis genes in the petals of evergreen azalea ‘Oomurasaki’ and its red flower sport     

D. Mizuta  A. Nakatsuka  I. Miyajima  T. Ban  N. Kobayashi 《Plant Breeding》2010,129(5):558-562

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Abscisic acid and 2,4-dichlorophenoxyacetic acid affect the expression of anthocyanin biosynthetic pathway genes in ‘Kyoho’ grape berries     

T. Ban  M. Ishimaru  S. Kobayashi  N. Goto-Yamamoto  S. Horiuchi 《The Journal of Horticultural Science and Biotechnology》2013,88(4):586-589

Summary

The effects of abscisic acid (ABA) and 2,4-dichlorophenoxyacetic acid (2,4-D) on the expression of seven anthocyanin biosynthetic pathway genes in ‘Kyoho’ grape berries were investigated. In untreated berries, the expression of the UDP-glucose-flavonoid: 3-O-glucosyltransferase (UFGT) gene was detected only at 42 d after full bloom (DAB), whereas the phenylalanine ammonia-lyase (PAL), chalcone synthase (CHS), chalcone isomerase (CHI), flavanone-3-hydroxylase (F3H), dihydroflavonol 4-reductase (DFR) and leucoanthocyanidin dioxygenase (LDOX) genes were expressed throughout the growing period. ABA increased anthocyanin content in the skin and the expression of PAL, CHS, CHI, DFR and UFGT genes at 7 d after treatment. In contrast, 2,4-D inhibited the accumulation of anthocyanin and the expression of all the genes examined. The results clearly show that the anthocyanin levels resulting from the application of ABA and 2,4-D were correlated with the expression of anthocyanin biosynthetic pathway genes.  相似文献   

Implication and challenges of direct-fed microbial supplementation to improve ruminant production and health     

Yajing Ban  Le Luo Guan 《畜牧与生物技术杂志(英文版)》2022,(2):316-337

Direct-fed microbials(DFMs)are feed additives containing live naturally existing microbes that can benefit animals’health and production performance.Due to the banned or strictly limited prophylactic and growth promoting usage of antibiotics,DFMs have been considered as one of antimicrobial alternatives in livestock industry.Microorganisms used as DFMs for ruminants usually consist of bacteria including lactic acid producing bacteria,lactic acid utilizing bacteria and other bacterial groups,and fungi containing Saccharomyces and Aspergillus.To date,the available DFMs for ruminants have been largely based on their effects on improving the feed efficiency and ruminant productivity through enhancing the rumen function such as stabilizing ruminal pH,promoting ruminal fermentation and feed digestion.Recent research has shown emerging evidence that the DFMs may improve performance and health in young ruminants,however,these positive outcomes were not consistent among studies and the modes of action have not been clearly defined.This review summarizes the DFM studies conducted in ruminants in the last decade,aiming to provide the new knowledge on DFM supplementation strategies for various ruminant production stages,and to identify what are the potential barriers and challenges for current ruminant industry to adopt the DFMs.Overall literature research indicates that DFMs have the potential to mitigate ruminal acidosis,improve immune response and gut health,increase productivity(growth and milk production),and reduce methane emissions or fecal shedding of pathogens.More research is needed to explore the mode of action of specific DFMs in the gut of ruminants,and the optimal supplementation strategies to promote the development and efficiency of DFM products for ruminants.  相似文献