探究城市化对厦门市气象要素的影响

该文以厦门市1952-1990年的气象资料为依据,通过距平分析和回归分析,分析城市化对厦门市气温、降水、日照时间等气象要素的影响,结果表明:1952-1990年间,厦门市年均气温总体呈下降趋势,年均低云量和降水量呈上升趋势,年均日照时间呈下降趋势。气象要素的变化可能与城市化进程有关。     

贵州务川黑牛线粒体DNA D-loop区全序列分析

务川黑牛是贵州省新近发现的独特地方品种,其起源和系统地位尚存争议.为了解其遗传多样性及遗传背景,该研究测定了22头务川黑牛个体的线粒体D-loop区全序列.结果表明:22头务川黑牛个体中存在51个核苷酸多态位点,碱基组成中A+T含量大于G+C含量;共检测到11种单倍型,核苷酸歧异度(π值)为5.475%,单倍型多样性Hd为(0.909±0.044),表明务川黑牛线粒体DNA D-loop高变区具有丰富的多态性;系统分析表明务川黑牛同时受普通牛和瘤牛的影响.     

Studies on the Ex Vitro Rooting for Test-tube Seedlings of Amorphophallus

经NAA和不同浓度水平的IBA处理后,能有效促进魔芋组培苗的生根。用浓度为10mg/L的IBA处理花魔芋无根组培苗30min的效果最好,平均生根率达90.83%,平均根数也最多(达3.92条)。用花魔芋和白魔芋无根组培苗在100mg/L的NAA中速蘸后也能较好地促进生根,白魔芋的平均生根率及平均根数分别为77.54%和2.43条/株,花魔芋的分别为84.14%和1.65条/株。     

Rheology,Microstructure, and Baking Characteristics of Frozen Dough Containing Rhizopus chinensis Lipase and Transglutaminase

The beneficial effects of a new recombinant lipase (Rhizopus chinensis lipase [RCL]) and transglutaminase (TG) were investigated on frozen dough systems and their breadmaking quality. Rheological properties and microstructure of doughs were measured using a dynamic rheometer, rheofermentometer F3, and scanning electron microscopy (SEM). Measurements of viscoelastic properties showed that both G′ and G″ of dough containing RCL and TG were greater than those of the control after 35 days of frozen storage. The SEM micrographs showed that dough containing RCL and TG had the most starch granules embedded in or attached to the gluten network, and the gluten seemed more powerful and resilient than for the control dough after 35 days of frozen storage. Results of the gas production and dough development tests indicated that RCL and TG improved the rheofermentative characteristics of frozen dough. RCL and TG could improve water‐holding capacity and significantly increase the glycerol content of the control dough. Image analyses showed that bread crumbs containing RCL and TG had a more open network and uniform crumb structure, which resulted in higher specific volume. This combination also yielded a product with higher sensory scores for test breads.     

基于农用地分等的基本农田保护空间规划方法研究

耕地中直接影响到粮食安全的是基本农田,实施耕地保护实质上就是实施基本农田保护。针对当前基本农田保护规划中存在的问题,以及本轮土地利用规划修编的特点和要求,考虑土地利用数据共享原则,对在基本农田保护规划中充分利用农用地分等成果进行了探讨,即在进行基本农田保护空间布局过程中,把农用地综合等作为一个重要因素加以考虑。在考虑粮食安全的基础上,再依据基本农田的内涵,建立了以基本农田保护规划决策模型为核心的技术方法。通过熵权系数法、理想点法与GIS技术的结合,基于Mapbasic编程并在Mapinfo平台上试验,建立了一套基本农田保护空间规划的技术路线,完成了从专业模型分析到规划图自动生成的全过程,实现了基本农田规划编制的决策支持和决策可视化,使规划成果更加科学合理。通过在济南市的实证,取得了令人满意的结果。