流感病毒受体特异性间接ELISA检测方法的建立     

邵振文’谭力凯  粟硕’曹楠  杨萌萌’张桂红 《中国兽医杂志》2014,(4):16-19

本研究采用过碘酸钠法对去唾液酸胎球蛋白进行辣根过氧化物酶(HRP)标记,然后通过两种不同类型的唾液酸转移酶对HRP去唾液酸胎球蛋白进行唾液酸标记,使其成为只含有单一受体的载体。利用MAA和SNA以及已知受体特性的两株流感病毒对唾液酸标记的HRP去唾液酸胎球蛋白进行受体结合特异性鉴定。结果表明,该方法可以快速准确的鉴定流感病毒的受体特异性。  相似文献   

浅析我国农村养老问题     

吴红娟 《山东省农业管理干部学院学报》2011,28(3):8-9

我国农村养老问题是摆在政府和社会面前的一项重要任务。目前,农村养老保险"广覆盖"的目标在一定程度上得到实现,但这种广覆盖是"低水平"的虽然对农村老年人的生活困难有一定的缓解,但不能从根本上解决养老问题。因此,深入了解和分析农村老年人口的生存和养老现状,探讨现阶段农村养老的可行路径,是现阶段迫切需要解决的问题。  相似文献   

Research on Chinese Labor Relations in Economic Transformation     

XIE Bin School of Management  Northwestern Polytechnic University 《中国林业科技(英文版)》2007,6(4):1-8

The economic transformation in China has caused significant changes to labor relations. It has made the labor relations more complex and labor conflicts apparent and frequent. However the coordination mechanism has not been developed correspondingly. Based on the empirical research upon current domestic and overseas labor relations, it is concluded that the supply of labor force exceeding the demand of it is the fundamental reasons for explaining labor conflicts in the economic transformation in China. It also suggested that the coordination mechanism of labor conflicts has mechanical dysfunction and the structure of harmonic labor relations would take a long time.  相似文献   

Ecophysiological Characteristics of Parthenocissus quinquefolia Planch under Different Soil Moisture Conditions     

ZHANG Shuyong  ZHOU Zefu  ZHANG Guangcan XIA Jiangbao ZHAN Haixia .Research Institute of Forestry  Chinese Academy of Forestry  Beijing  P. R. China . Laboratory of Tree Breeding  Cultivation  State Forestry Administration  Beijing  P. R. China . Forestry College  Shandong Agricultural University  Tai’an  P. R. China 《中国林业科技(英文版)》2006,5(4):76-81

INTRODUCTION People have been working hard to find greening plants which have the characteristics of strong resistance, quick growth and high coverage in barren mountainous areas (Wang Hansheng 2004; Wang Lixian et al. 2005). The role and position of Parthenocissus quinquefolia planch, which is regarded as a vine with strong climbing ability, high coverage and less demand for soil water and nutrition, started to be valued (Zhao Guangde 2002; Zhang Yigong et al. 1999). But most research…  相似文献   

Effects of NaCl Stress on Chlorophyll Fluorescence Parameters in Cinnamomum japonicum var. chenii   总被引：3，自引：0，他引：3  

LI Ying-li    WANG Kui-hong  DU Guo-jian  XU Li-qun  YANG Hua  XIAO Ji-jun  . School of Forestry  Biotechnology  Zhejiang Forestry College  Lin’an  . Zhejiang Academy of Forestry  Hangzhou 《（《农业科学与技术》）编辑部》2008,(2)

[Objective] Study on the changes of chlorophyll fluorescence parameters in Cinnamomum japonicum var. chenii under NaCl stress. [Method] The seedling growth increment,chlorophyll content and chlorophyll fluorescence parameters in leaves of 1-year old Cinnamomum japonicum var. chenii were investigated in field experiment. [Result] Under NaCl stress,seedling growth increment reduced and the chlorophyll content decreased to a stable value; changes of Fv/Fm and Fv/Fo showed identical increasing trend and double peak type. With the aggravation of salt stress,most variations were observed in Fo,correlations among chlorophyll fluorescence parameters presented "rise-drop" trend (in the treatment of 7 g/L NaCl). [Conclusion] Cinnamomum japonicum var. chenii is endowed with strong salt resistance and wide adaptability.  相似文献   

断奶期仔猪防治E.coli的自然方法     

李红  Romain D’lnca 《国外畜牧学(猪与禽)》2012,32(2):35-37

仔猪服用抗生素能预防性地减少猪消化道中大肠杆菌数量吗?这是根本不可能的。有一些自然方法可以阻止病原体的存在。最近的两项试验表明,活性酵母可显著地降低由E.coli引发的新生和断奶仔猪死亡率和发病率。  相似文献   

约旦河谷土壤含盐量变化对其灌溉农业可持续发展的潜在危害研究     

T. G. AMMARI  R. TAHHAN  S. ABUBAKER  Y. AL-ZU''BI  A. TAHBOUB  R. TA’ANY  S. ABU-ROMMAN  N. AL-MANASEER  M. H. STIETIYA 《土壤圈》2013,23(3):376-384

The integrated effect of irrigation and agricultural practices on soil salinity in the Jordan Valley （JV）, where over 60% of Jordan’s agricultural produce is grown, was investigated in this study during 2009-2010. Due to the differences in agricultural operations, cropping patterns, irrigation management, and weather conditions, 206 top- and sub-soil samples were taken every 1 to 3 km from representative farms along a north-south （N-S） transect with 1 to 2 km lateral extents. Soil electrical conductivity of saturated extract (EC_se), Ca, Mg, K, Na, Cl, and Na adsorption ratio （SAR） were determined in saturated paste extracts. Results indicated that about 63% of soils in the JV are indeed saline, out of which almost 46% are moderately to strongly saline. Along the N-S transect of the JV, EC_se increased from 4.5 to 14.1 dS m^-1 in top-soil samples. Similar increase was observed for the sub-soil samples. The major chemical components of soil salinity; i.e., Ca, Mg, and Cl, also showed a similar increase along the N-S transect of the valley. Moreover, compared to previous field sampling, results showed that changes in soil salinity in the JV were dramatic. In addition, it was found that Cl imposed an existing and potential threat to sensitive crops in 60% of the soils in the JV, where Cl concentrations were greater than 710 mg L^-1. Under the prevalent arid Mediterranean conditions, improving the management of irrigation water, crops, and nutrient inputs and increasing water and fertilizer use efficiencies should be indispensable to conserve and sustain the already fragile agricultural soils in the JV.  相似文献   

重庆市巴南区园林绿地节水技术应用现状     

李劲松  吴红娟 《西南园艺》2013,(11):9-12

从建设抗旱型绿地,采用节水灌溉技术如采用滴灌桶、可移动式滴灌袋、多孔式微喷带、自动喷灌、可移动喷灌等,埋设透气管,铺设透水砖等4个方面对重庆市巴南区园林绿地节水技术进行了阐述。最后对节水型园林绿地提出了系列建议,如将灌溉系统纳入园林绿地规划中,注重乡土植物运用,加大科技产品应用,搜集汛期降雨等。  相似文献   

Preparation and characterization of carbon cones by reaction plasma          下载免费PDF全文

CHEN Yu’an  CHEN Xuan  XU Xingzi  WANG Biben 《保鲜与加工》2013,(1):98-102

Carbon cones are prepared on Si substrates film in plasma-enhanced hot filament chemical vapor deposition system using CH4, H2 and NH3 as the reaction gas, and the substrates are deposited with Ti and carbon film, respectively. Morphology and structure of the carbon cones are characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX)and micro-Raman spectroscopy. The SEM results indicate that the carbon cones are formed on the Si substrate deposited with carbon film. Furthermore, the EDX and Raman spectra indicate that the formed carbon cones are carbon nitride structure, which are composed of sp 3 C-N, sp 2 C and sp 2 C=N bonds. According to the mechanisms of sputtering and diffusion, the formation of carbon cones is analyzed. Simultaneously, the photoluminescence background in the Raman spectrum of carbon cones is analyzed, and results indicate that the carbon cone evolves from nonpolar carbon material to polarity carbon material due to the doping of nitrogen.  相似文献   

冬小麦“三优三防”高产栽培技术     

山西省农科院‘三优三防’协作攻关组 《作物杂志》1992,(2):15-17

山西省农业科学院于1983～1990年组织实施以粮为主大面积增产增收示范区工程,主要是在全省不同生态区建立30个中心示范点,第一年每点搞好2000亩样板田,共摆出6万亩主要粮食作物高产样板田,第二年指导带动60万亩粮田,第三年进一步扩大辐射600万亩粮田,促进作物产量较大辐度提高。在3年实施过程中,主要在南部冬麦区、中部冬麦区,分别设置了中心示范点,利用已有科研成果组装配套形成了与当地生态条件相适应的小麦高产抗逆配套栽培技术,在示范田上认真贯彻落实,同时根据生产上存在的问题,立题进行开发研究,补充和完善了保浇水地“三优三防”高产配套技术,亩产指标400公斤,经边试验研究边示范推  相似文献