苗盘烟雾消毒方法对烤烟苗盘处理效果研究     

毛金柱  杨俊  苏泽顺  李强  黄修平  谭中平  皮本阳 《现代农业科技》2015,(12)

为了验证苗盘烟雾消毒方法对烤烟苗盘的处理效果和安全性,试验设计了常规高锰酸钾消毒和苗盘烟雾消毒2种方法,结果表明:苗盘烟雾消毒方法省工省时,药剂用量和耗水量少,对烤烟苗盘有着较好的消毒效果,且对烟苗生长没有负面作用。  相似文献   

菜籽油裂解燃料离子液体催化酯化反应降酸工艺的研究     

张爱华  李洋  肖志红  张良波  皮兵  李昌珠 《湖南林业科技》2014,(5):47-49

为了降低裂解燃料酸值,增加燃料的稳定性能,将吡啶丁烷磺酸硫酸氢盐应用于菜籽油裂解燃料的酯化反应。考察了催化剂用量、反应时间和反应温度等对酸值的影响,并在最佳优化条件下考察了裂解燃料成品的理化性质。结果表明:吡啶丁烷磺酸硫酸氢盐对催化酯化反应具有很高的催化活性。优化工艺条件为:催化剂用量1.2%、反应温度75℃、反应时间70 min,在此工艺条件下,酸值降低到1.0 mgKOH/g以下。  相似文献   

江汉鸡生长发育与曲线拟合情况分析     

吴艳  潘爱銮  皮劲松  申杰  张昊  蒲跃进  梁振华  杜金平  孙静  黄竹林  王孝忠 《湖北农业科学》2020,59(21)

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重庆市农业科技创新战略探讨     

叶志强  何春媛  皮竟  马强 《湖北农业科学》2014,(12):2944-2947,2954

农业科技创新是实现农业可持续发展的主要动力,自然条件决定了重庆市必须走特色效益型现代化农业之路。深入分析了当前重庆市农业科技创新取得主要成效及存在主要问题,明确提出了新形势下重庆市农业科技创新战略定位与目标,研究探讨了推动重庆市农业科技创新的6个战略建议,对加快推进重庆市特色效益型农业科技创新体系建设具有重要的科学参考价值。  相似文献   

Describing Human–Wildlife Interaction from a European Perspective     

Maria Johansson  Sabrina Dressel  Emma Kvastegård  Göran Ericsson  Anke Fischer  Bjørn P. Kaltenborn 《Human Dimensions of Wildlife》2016,21(2):158-168

European researchers from both the natural and social sciences show growing interest in studying interactions between society and wildlife. A wealth of theoretical frameworks, concepts, and methods are used, but an integration of perspectives is lacking. This research note summarizes results from two workshops that included 63 delegates from 25 European countries, as well as a follow-up survey of 41 respondents. Two main theoretical approaches to the study of human–wildlife interactions were identified. One approach focuses on the collective societal level relying on theories of governance, social representation, deliberative procedures, and commons theory. The other approach targets individuals or groups, and is based on theories such as the cognitive hierarchy, theory of reasoned action, and theory of planned behavior. Interdisciplinary collaboration is needed to identify the best options for wildlife conservation and management in a more politically integrated Europe.  相似文献   

Determination of biogenic amines in aerobically stored beef using high-performance thin-layer chromatography densitometry     

S. Li  M. Johansson  J. K. Vidanarachchi  J. Pickova  G. Zamaratskaia 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2016,66(4):199-205

The aim of this study was to develop a high-performance thin-layer chromatography densitometry method to simultaneously evaluate levels of different biogenic amines (BAs) in beef stored aerobically at 4°C. Steaks from M. longissimus thoracis et lumborum muscles were overwrapped with polyvinyl chloride film and stored for 0, 4, 7, and 10 days. For this purpose, the solvent system and pH for the derivatization of BAs with dansyl chloride were optimized. Moreover, this method was also validated for linearity, limits of detection and quantification, precision, and recovery. As found using this method in beef samples, spermine content decreased significantly after 7 days of storage, and tyramine and cadaverine were not detected until day 10.  相似文献   

Cardiovascular effects of acute pulmonary obstruction in horses with recurrent airway obstruction     

Johansson AM  Gardner SY  Atkins CE  LaFevers DH  Breuhaus BA 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2007,21(2):302-307

BACKGROUND: Recurrent airway obstruction (RAO) is common in horses. Although pulmonary artery (PA) pressure increases during RAO, cardiac function in horses with RAO has received limited attention. HYPOTHESIS: The purpose of this study was to noninvasively determine the cardiovascular effects of acute pulmonary obstruction (APO) in horses with RAO and their reversibility. ANIMALS: Five geldings with RAO, inducible by exposure to moldy hay, were studied. METHODS: Pulmonary mechanics, echocardiography, serum troponin I concentrations, arterial blood gases, and hematocrit were obtained before and after 7 days of APO. Heart rate, PA diameter and flow characteristics, right and left ventricular luminal dimensions and wall thicknesses, global cardiac performance, and evidence of myocardial damage were evaluated. Pulmonary mechanics and echocardiography were reevaluated during remission. RRESULTS: Severe, transient APO did not induce chronic cor pulmonale in horses, because cardiac anatomy and function were normal between episodes. An acute episode of APO produced anatomical and functional cardiac changes in both the right and left heart (including increased PA diameter, abnormal septal motion, and decreased left ventricular diameter and estimated stroke volume), possibly because of the development of pulmonary hypertension, without apparent myocardial damage. The decrease in stroke volume was offset by the increase in heart rate. CONCLUSIONS AND CLINICAL IMPORTANCE: With APO of 7 days' duration, cardiovascular abnormalities and the functional airway changes that produce them are reversible when the offending allergens are removed.  相似文献   

The Design of Heart Function Detection System Based on the Virtual Instrument     

PI Xi-tian  HEI Xiao-guang  ZHENG Xiao-Lin  CHEN Feng  LI Yong-an  HOU Wen-sheng  YANG Jun  LU Bo 《保鲜与加工》2007,(9):109-112

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Comparative Experiment Research on Seismic Behavior of New Reinforcement Scheme Coupling Beam with Slab     

PI Tian-xiang  LIU Guang-wei  FU Jian-ping  BAI Shao-liang 《保鲜与加工》2007,(8):107-113127

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探索"思想道德修养与法律基础"课程教学实践环节新途径     

皮伟  刘先凡 《湖南农机》2007,(9):65-67

"思想道德修养与法律基础"课(简称"基础"课)作为对大学生进行思想道德素质和法律素质教育的主渠道之一,在大学生思想政治教育与法律基础教育中发挥着极为重要的作用。针对目前我国高校"基础"课教学在教育观念和教学方式方面存在的不足,本文从在课程教学设计上突出道德与法律基础教学的实践环节、激发和调动大学生参与思想道德和法律基础教学实践的积极性和主动性、重视教学实践的科学性等几个方面入手,对"基础"课的教学实践环节进行了尝试性的探索。  相似文献