Factors Affecting Sensory Quality of Cooked japonica Rice

The sensory quality of cooked rice is an important factor in determining its market price, as well as consumer acceptance and breeding efforts aimed at improvement of rice grain quality. In this study,the sensory quality and physicochemical properties of three japonica rice varieties harvested in two different growing locations(Xiangshui and Hangzhou of China) were compared to determine the most important factors affecting the sensory quality. All the three varieties had higher scores for overall sensory quality in Xiangshui than in Hangzhou, indicating that the growing location is a key factor in determining the sensory quality of cooked japonica rice. In addition to growing location, variety(genotype) also had an important effect. Longdao 18 scored the highest for overall sensory quality in the two locations, whereas Longdao 30 had the lowest score in Xiangshui, and both Longdao 20 and Longdao 30 had the lowest scores in Hangzhou. Many physicochemical properties, such as apparent amylose content, protein content, thermal properties and free amino acid contents, showed significant differences between the two locations. Correlation analysis showed that apparent amylose content and protein content had contrasting effects on all the sensory attributes. The overall sensory quality was negatively correlated with protein content(r =-0.89, P 0.01) and positively correlated with gel hardness(r = 0.91, P 0.01),indicating that the protein content and hardness are important physicochemical properties for predicting the sensory quality of japonica rice. These findings will provide guidance for selection from the diverse genotypes available to develop new varieties with the desired eating and cooking quality.     

广东贫困地区“科教兴村”工程及实施方案

广东省经济发达,但农业发展相对滞后,且农村经济社会发展存在区域性不平衡,其东西两翼和粤北有16个贫困县,严重影响广东省全面建设社会主义新农村的发展计划;因此,在广东贫困地区实施“科教兴村”工程十分必要。本文强调了在广东贫困地区实施“科教兴村”工程的必要性;分析了其实施的有利条件和不利因素;提出了具体的实施方案。     

浅析奖励机制在科研成果产出中的导向作用——以北京市农林科学院为例

科研成果产出反映了科技创新能力的强弱,成果产出离不开杰出的科研人才和团队.为了提升科技创新能力,有效激发科研人员的主动性和积极性,不断提升科研成果质量,国家、地方、科研单位和高校都制定并出台了相应的科研成果奖励办法.文章以北京市农林科学院为例,对该院科技创新成果奖励的执行情况进行分析,以期总结出科技创新奖励对成果产出的导向作用.     

宁都黄鸡卵巢中卵泡生长速度的研究

试验以我省名地方鸡种－宁都黄鸡成年母鸡为研究对象，每天间隔饲喂脂类染色剂ＳｕｄａｎⅢＳｕｄａｎＢｌａｃｋ，其卵泡因其脂质被染色而形成红墨相间的染色环，根据染色环圈数判断卵泡成熟前迅速生长的天然，根据染色环半径计算出卵泡第天沉积量。     

犬红细胞Cu·Zn－SOD的纯化及其部分特性

采用乙醇－氯仿处理、加热、丙酮沉淀和ＤＥＡＥ－ＳｅｐｈａｄｅｘＡ－５０柱层析的方法，从犬血红细胞中提纯了铜锌超氧化物歧化酶（Ｃｕ·Ｚｎ－ＳＯＤ），并对其部分性质进行了研究。比活力为４１５０Ｕ／ｍｇ，不连续聚丙烯酰胺凝胶电泳呈现１条区带，ＳＤＳ－聚丙烯酰胺凝胶电泳测得该酶的亚基分子量为１６３００，紫外最大吸收峰位于２５９ｎｍ，氨基酸组成中不含有色氨酸。     

恒线速旋切机旋切技术参数的计算

通过对恒线速旋切机旋切速度，转速，时间，单板长度等技术参数的计算与研究，导出了旋切机转速方程式，由该方程式计算出的全部技术参数，与实际测量的结果一致，这种推导与计算方法的研究，用于旋切机是完全正确的。     

A Review of flavonoids against Cancer and Its Mechanism

类黄酮是植物染料，在流行病学的研究中发现其有抗癌症的作用。类黄酮是许多医用草药的主要功能性成分，表现出生物活性和预防癌症的作用。尽管类黄酮和癌症的流行病学的研究结果仍有限，但富含类黄酮的食物已被提倡。     

强非线性水平混沌振动台

该文研究了一种水平混沌振动台,机构的运动微分方程是强非线性的,数值仿真和实验结果表明,该振动台的动态响应是混沌的,且敏感依赖于初始条件。     

稻田高效间作模式生态经济效益研究

 本文总结了1985-1991年稻田间作模式随机区组试验和生产对比试验的有关产量、经济效益和生态效应的一系列资料。结果表明，本研究提出的各间作模式在创立高效农业上具有明显的优势，可作为我国发展高效生态农业的参考。     

一种具有实用价值的螺旋线

介绍了一条新型螺旋线，该线有理论推导，可广泛应用于通风机，水泵壳体的型线设计上，有很高的实用价值。该螺旋线能够直接用仪器绘出，可以近似替代其它螺旋线。