酯化大豆蛋白的制备及抑菌性研究

采用大豆分离蛋白(Soy Protein Isolate,SPI)、大豆球蛋白(11S)和β-伴大豆球蛋白(7S)为原料,进行酯化改性,研究反应时间、盐酸浓度以及蛋白质与甲醇的物料比对蛋白质酯化率的影响.根据酯化率确定3种酯化大豆蛋白(MSPI、M11S、M7S)的制备条件,并测定酯化大豆蛋白的红外光谱、Zeta-电位...     

一种酶改性制备低凝胶性高分散性大豆蛋白的方法

通过过渡态大豆蛋白的酶改性制备低凝胶性高分散性大豆蛋白的方法属于大豆深加工技术领域。本发明采用低温脱脂豆粕为原料,先得到一种部分热变性的过渡态大豆蛋白．然后使用内肽酶和外肽酶进行酶解,反应结束,经过适当的加热灭酶处理得到苦味低、分散快、凝胶性弱、悬浮稳定性好的大豆蛋白。该大豆蛋白产品可应用于乳制品、饮料和冲调饮料、蛋白质营养补充剂及注射型蛋白产品中。     

Alcalase碱性蛋白酶水解大豆蛋白的工艺过程及动力学研究

对Alcalase碱性蛋白酶催化水解大豆蛋白的系统研究,得到催化水解大豆蛋白的优化水解工艺,并对其动力学特性进行了初步探讨。     

含大豆蛋白肽的栗羊羹制备工艺与抗氧化活性研究

本文以红豆、板栗为主要原料,添加大豆蛋白肽为营养强化剂,结合单因素实验对含大豆蛋白肽的栗羊羹的制备工艺进行研究。结果表明,当琼脂为2.0 g、红豆沙为15 g、栗子粉为12 g、大豆蛋白肽为6 g、β-环糊精为5 g和大豆低聚糖为15 g时,所得含大豆蛋白肽的栗羊羹的色泽均匀、栗香味浓、口感细腻。200 mg含大豆蛋白肽的栗羊羹的DPPH·清除率为62.9%,说明本文制备的大豆肽栗羊羹有很好的抗氧化活性。     

Alcalase碱性蛋白水酶解大豆蛋白的工艺过程及动力学研究

对Alcalase碱性蛋白酶催化水解大豆蛋白的系统研究,得到催化水解大豆蛋白的优化水解工艺,并对其动力学特性进行了初步探讨。     

大豆蛋白热聚集体的结构表征

本文研究了热处理对大豆蛋白热聚集体的结构影响.结果表明:热诱导聚集体的形成降低了大豆蛋白β-折叠结构含量,增加了大豆蛋白二级结构的无序性.60℃和80℃热诱导大豆蛋白热聚集体的形成使大豆蛋白结构更趋于\"包埋态\",而100℃热诱导大豆蛋白热聚集体的形成使大豆蛋白更趋于\"暴露态\".     

美拉德反应调控大豆蛋白功能性质的研究进展

大豆蛋白(Soy Protein Isolate,SPI)在赋予食品质构和稳定性中发挥重要作用。美拉德反应能够改变大豆蛋白的相对分子质量、氨基酸组成、电荷和结构,进而改变大豆蛋白的功能性质。本文对美拉德反应对大豆蛋白结构、功能性质的影响以及目前美拉德产物构效关系研究存在的局限性进行综述,同时展望了该研究在食品加工中的应用前景。     

发展湖北现代农业物流业的对策研究

通过分析湖北农业物流发展现状,提出了建立1个产业、搭建3个平台、构筑3大体系、建立1个园区、建设3个生产基地、设立9个物流中心的总体发展框架,并围绕湖北农业物流基础设施平台、信息网络平台、物流政策平台、湖北农业生产基地、农业物流园区、农业物流中心的规划建设等6个方面提出了相应的政策建议。     

我国主产区大豆生产能力影响因素分析

本文采用固定效果模型对大豆主产区1991-2002年大豆总产量的主要影响要素进行估计．结果表明生产函数中基本投入要素：大豆播种面积、劳动用工总量、化肥投入、种子秧苗投入、其他物质费用是影响大豆产量的主要要素；其中大豆播种面积的弹性系数最大。对1991-2002年大豆的各主要生产要素对大豆产出增长贡献率的测算表明：大豆播种面积、化肥和种子秧苗的投入对大豆产出增长的贡献最大。     

Spatiotemporal dynamics of soybean crop in the Matopiba region,Brazil (1990–2015)

Brazil is a world leader in the production and export of grains, particularly soybeans. The newest agricultural frontier in Brazil is the Matopiba region, which is a continuous zone formed by the states of Maranhão, Tocantins, Piauí, and Bahia, located mostly within the Cerrado biome. The objective of this study was to analyze the spatiotemporal dynamics of soybean production and yield in the Matopiba region. We analyzed municipality-based planted areas and production data obtained by the Brazilian Institute of Geography and Statistics during 1990–2015. Yield was estimated from the production and planted area, and the data were analyzed using global and local Moran indices. The results showed that soybean production in the Matopiba region does not occur randomly. Positive and significant autocorrelation was found at the beginning of the time series among those municipalities located in the west of Bahia. This region influenced the soybean expansion from south to north. Currently, high-production areas are concentrated in two autocorrelated blocks: one in western Bahia and the other in the central Matopiba region. Analysis of spatial autocorrelation involving yield showed a decreasing trend at the end of the time series. The presence of municipalities with high yield surrounded by others with low yield, and vice-versa, were observed. The findings of this study could assist local and regional agricultural planning in the Matopiba region, and support related analyses in other fields of agriculture, the environment, and logistics.     

古代韩国旱田耕作法和农耕制度的考察(续)

由于高丽时代以前的农书尚未发现，我们几乎不可能确切了解朝鲜半岛三国时代的农业技术和农业状态；但是从朝鲜时代的农书可以看出，当时受中国农书《齐民要术》和《农桑辑要》等的影响很大。文章研究了在朝鲜半岛中部出土的刻有农耕图象的农耕文青铜器，进而考察了南江流域大坪里和汉江流域漠沙里的青铜时代农田遗址，认为三国时代的农业发展相当迅速，从而进一步考证了古代韩国的传统旱田耕作法和农耕制度。     

数量化理论模型在大豆食心虫虫食率的预测中的应用

大豆食心虫的危害程度是由虫食率来决定的,影响大豆食心虫虫食率的因素很多,以往对虫食率的预测方法只是基于定量变量,并且要求预测数据准确,然而影响害虫的危害程度的因素除定量因素外,还有许多定性因素,本文考虑影响大豆食心虫虫食率的定量因素:上年平均脱荚孔数、上年9月(中下旬)平均气温、上年9月份(中下旬)降水量、上年10月份(上旬)降水量、当年7月份平均气温、当年7月份降水量以及当年7月份湿度作自变量和定性因素:大豆品种、幼虫越冬存活率和8月分平均百米蛾量(观测误差较大的数据做为定性变量来考虑),以当年的虫食率作为基准变量建立数量化理论模型,增加了数据资料信息的应用,取得了精确的预测结果,对实际工作有一定的指导意义.     

生防菌防治土传真菌病害现状及抗性物质的研究进展

本文论述了以细菌为主要生防菌株防治作物土传真菌病害的现状,并对真菌病害起主要防治功能的细菌代谢产物的种类进行综合评述。     

论良繁中心、良种基地及林木良种工作

剖析我省林木良种繁育现状,论述良繁中心、良种基地及林木良种工作三者关系,认为良繁中心与一般良种基地在良繁体系中应承担不同繁育任务,并提出良繁中心今后工作方向与重点、基地建设的若干构想以及推进我省林木良种工作上一个新台阶的措施。     

Farmers’ perception of their decision-making in relation to policy schemes: A comparison of case studies from Switzerland and the United States

Farmers are decision-makers in a complex system of cause and effect. They decide with respect to their own attitude and beliefs, according to their farm structure and they take into account programs and regulations of the overarching policy scheme. In this paper we used mail surveys with identical questions to establish a cross-national comparison of two case study areas. The questionnaire investigates farmer's perspectives on what influences their own decision-making as well as their perception of the socio-ecological environment to relate these findings to the respective policy schemes in the case study areas. The two case studies are located in Southern Illinois, United States and in central Switzerland. The analysis shows that full-time farmers of the Southern Illinois case study area rate constraining factors such as financial aspects higher than Southern Illinois part-time farmers and farmers from the central Switzerland case study area. Furthermore, it is apparent that Swiss case study-farmers rate aspects of their land use responsibility and the Illinois case study-farmers rate ecological aspects higher. The empirical findings can be qualitatively explained through analysis of agricultural policy schemes.