减灾工程与农业生产产出相关性探析

为测量减灾工程对农业生产产出的影响,用灰色关联分析算法和计量模型方法,对农业生产系统中除涝、灌溉、堤防、水库等指标数据进行了无量纲化处理,形成指标关联度评估,同时在柯布-道格拉斯生产函数基础上将各指标数据纳入回归分析中,完成了除涝等指标对农业生产产出影响的定量评价．实证研究表明:影响农业生产的减灾工程作用从大到小的顺序为:除涝面积、灌溉面积、堤防长度、盐碱地改良面积、水库容量、水土流失治理面积. 扩大除涝面积、修建水库、增加堤防长度增加了农业生产总值,其中除涝对增加农业产值的效用最大,自然灾害阻碍了农业生产的发展,加大减灾工程投入有利于增加农业生产产出．     

湖北省农产品加工业创新推进县域经济发展的战略研究

在分析湖北省农产品加工业发展现状的基础上，论述了湖北省农产品加工业创新发展的思想、目标和战略布局，并系统地提出了湖北省农产品加工转化业创新发展推动县域经济发展的战略体系。     

我国农业机械涂料与涂装的应用及发展

介绍了我国农业机械涂料与涂装的技术水平和发展现状,指出目前涂料及涂装存在的问题,并分析了其发展趋势。     

Berry Phenolics of Grapevine under Challenging Environments

Plant phenolics have been for many years a theme of major scientific and applied interest. Grape berry phenolics contribute to organoleptic properties, color and protection against environmental challenges. Climate change has already caused significant warming in most grape-growing areas of the world, and the climatic conditions determine, to a large degree, the grape varieties that can be cultivated as well as wine quality. In particular, heat, drought and light/UV intensity severely affect phenolic metabolism and, thus, grape composition and development. In the variety Chardonnay, water stress increases the content of flavonols and decreases the expression of genes involved in biosynthesis of stilbene precursors. Also, polyphenolic profile is greatly dependent on genotype and environmental interactions. This review deals with the diversity and biosynthesis of phenolic compounds in the grape berry, from a general overview to a more detailed level, where the influence of environmental challenges on key phenolic metabolism pathways is approached. The full understanding of how and when specific phenolic compounds accumulate in the berry, and how the varietal grape berry metabolism responds to the environment is of utmost importance to adjust agricultural practices and thus, modify wine profile.     

Isocyanate‐Free and Dual Curing of Smokeless Composite Rocket Propellants

Traditional composite rocket propellants are cured by treatment of hydroxyl‐terminated prepolymers with polyfunctional aliphatic isocyanates. For development of smokeless composite propellants containing nitramines and/or ammonium dinitramide (ADN), energetic binder systems using glycidyl azide polymer (GAP) are of particular interest. Polyfunctional alkynes are potential isocyanate‐free curing agents for GAP through thermal azide‐alkyne cycloaddition and subsequent formation of triazole crosslinkages. Propargyl succinate or closely related aliphatic derivatives have previously been reported for such isocyanate‐free curing of GAP. Herein, we present the synthesis and use of a new aromatic alkyne curing agent, the crystalline solid bisphenol A bis(propargyl ether) (BABE), as isocyanate‐free curing agent in smokeless propellants based on GAP, using either octogen (HMX) and/or prilled ADN as energetic filler materials. Thermal and mechanical properties, impact and friction sensitivity and ballistic characteristics were evaluated for these alkyne cured propellants. Improved mechanical properties could be obtained by combining isocyanate and alkyne curing agents (dual curing), a combination that imparted better mechanical properties in the cured propellants than either curing system did individually. The addition of a neutral polymeric bonding agent (NPBA) for improvement of binder‐filler interactions was also investigated using tensile testing and dynamic mechanical analysis (DMA). It was verified that the presence of isocyanates is essential for the NPBA to improve the mechanical properties of the propellants, further strengthening the attractiveness of dual cure systems.     

大力发展生物农药产业化,提升我省农产品的国际竞争力

本文提出从发展农药高新技术产业入手,加强食品安全工程的措施：一方面强化农药残留的快速检测技术,另一方面大力发展高效低毒的生物农药取代高度化学农药。并以华南农业大学为代表,总结了我省在这些领域的主要研究进展及成果。     

New fluorinated poly(1,3,4-oxadiazole-ether-imide)s

New fluorinated poly(1,3,4-oxadiazole-ether-imide)s have been prepared by solution polycondensation reaction of different aromatic diamines having preformed 1,3,4-oxadiazole ring, such as 2,5-bis(p-aminophenyl)-1,3,4-oxadiazole, 2,5-bis[p-(4-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2,5-bis[p-(3-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2-(4-dimethylaminophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole and 2-(4-fluorophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole, with an aromatic dianhydride incorporating ether linkages and hexafluoroisopropylidene group, namely 1,1,1,3,3,3-hexafluoro-2,2-bis-[(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride. The polymers were easily soluble in polar organic solvents, such as N-methylpyrrolidinone, N,N-dimethylformamide, and pyridine, as well as in certain low boiling-point organic solvents, such as tetrahydrofuran and chloroform. Very thin coatings deposited onto silicon wafers exhibited smooth, pinhole-free surface in atomic force microscopy. The polymers showed high thermal stability with decomposition temperature being above 410 °C. They exhibited a glass transition in the temperature range of 183-217 °C, with reasonable interval between glass transition and decomposition temperature. Solutions of some polymers in N,N-dimethylformamide exhibited blue fluorescence, having maximum emission wavelength in the range of 411-424 nm.     

农产品农药残留检测技术研究进展

现阶段,我国食用农产品的种类与数量在不断增加,其安全问题受到高度关注与重视,因此,要加强食用农产品的农药残留检测工作,避免给消费者带来食品安全隐患.为了实现对农产品农药残留的有效检测,对检测技术的研究尤为重要.结合农产品农药残留检测技术的应用及发展现状进行探索,提出具体策略,以期能为同行从业人员提供参考.     

农药敌克松废水处理方法的研究

农药敌克松生产废水,系浓度较高且不可生物降解的有机废水,本文采用碳黑吸附——电解法处理,处理后的废水COD cr降至170mg/L,符合国家规定的企业排放标准。     

江苏省磷资源安全评价与演化趋势

通过系统的资料整理与严密的数据分析,在阐述省内磷资源概况与化肥施用需求的基础上,依据熵值法修正的层次分析法建立了农用矿产资源的安全评价体系。修正的安全系数和最终计算结果更加符合实际,显示了该方法的科学性、优越性。评价结果表明:江苏省磷资源安全演化整体呈下降趋势,结合省内情况可分为4个阶段。资源禀赋是影响农用矿产安全的主要因素,其次是化肥施用量、勘查资金投入等因素,据此强调开拓市场、科学施肥、保护环境。模型的建立及结果对资源产业持续健康发展和区域经济社会发展具有参考意义。