果蔬产品变色原因分析及其控制

分析了果蔬产品在加工贮存中变色的原因,综述了目前生产中常用的行之有效的护色措施,包括生物、化学和物理等方面的处理方法。     

环境污染对农业生态系统服务功能影响

农业生态系统服务功能是农业生态过程和人类活动所形成的人类赖以生存的自然环境条件与效用. 城市污染物排放增加, 农业化学品污染加重, 农村畜禽粪尿污染成灾以及乡镇企业污染发展影响了农业生态系统有机质生产, 降低了农业产品品质, 减弱了土壤生态过程, 破坏了生物多样性, 减弱了气候调节与减灾功能, 减少了动物传粉与有害生物控制效应七项生态服务功能. 遏止环境污染是保护农业生态系统服务功能的关键.     

穗肥施用时期对水稻籽粒中胚乳蛋白积累的影响

以武香粳9号为材料研究了不同穗肥施氮时期对水稻籽粒蛋白质积累的影响.结果表明:穗肥的施用提高了籽粒发育过程中单位干重蛋白质含量,以在倒0.5叶施用氮素穗肥影响最大;随施肥时期的延迟,稻米粗蛋白和谷蛋白含量逐步上升,醇溶蛋白含量逐渐降低;倒2.5叶施氮减少了强、弱势粒中蛋白组分的分布和含量,倒0.5叶施氮与此相反;胚乳     

HACCP体系在种植业应用的理论初探

重点介绍了HACCP体系的含义、起源、发展和原理,探讨了该体系在农产品生产等农业种植业领域中应用的可行性,对我国无公害农产品的生产、绿色食品的认证和发展农村经济、保障人们的身体健康具有重要的现实的意义。     

Discussion of the Application and Foreground of Falling Water Aeration with the Process of Sewage Treatment

The engineering design of sewage treatment plant for the Chongqing city, P. R. China is analyzed in this paper. Considering the situation of China and other projects, the characteristics of falling water reactor for the environment protection project and economy of investment is introduced ; the application and foreground of falling water aeration in the process of sewage treatment is discussed, such as Oxidation - ditch, SBR, and so on. The conclusion indicated that the falling water aeration can be designed and used as an independent aeration, and, it is an upgraded technology of sewage treatment which is adaptive for city water environment control in middle and small towns in China. The falling water aeration may reduce running cost of the sewage treatment plant, is adaptive for foothill and the mountainous areas, and reduces project investment and environments damage.     

不同花生品种侧枝发育动态与产量性状研究

花生一级侧枝发育具有不均衡性。第一、二对侧枝出现早，伸长快，其他一级侧枝出现晚，伸长慢。86036－26－1第一、二对侧枝发育相对较早，而其他一级侧枝发育较晚；海花1号和豫花1号第一、二对发育相对较晚，而其他一级发育较快；豫花7号和鲁花9号居中。海花1号一级侧枝及第一对侧枝的二级侧枝数最多，86036－26－1的一级侧枝数及第一对侧枝的二级侧枝数量少。在花针期之前第一对侧枝的伸长与主茎基本同步；花针期之后，第一对侧枝伸长速度超过主茎。86036－26－1的一级侧枝长及株高居首位。86036－26－1第一、二对侧枝饱果率，产量居第一，豫花7号居第二。海花1号虽然荚果数较多，但第一、二对侧枝孢果率较低，产量也较低；鲁花9号居中。     

励磁功率单元主回路快速故障诊断策略

分析总结了发电机组励磁系统功率单元的故障类型和常见故障,通过Matlab仿真功率单元主回路故障类型,重点研究基于故障频谱分析的定量故障特征提取和故障分类,提出了一种快速针对功率单元主回路的故障诊断真值表法,最后通过实验平台验证故障类别,结果表明：该方法能够正确有效地诊断出功率单元主回路具体的故障晶闸管,为励磁系统功率单元故障诊断提供依据。     

A Mininum Ring-band Mathematical Definition, Numerical Algorithm

A minimum ring-band mathematical definition :In the done ring-band, there are at least two inner points and two outer points which scatter staggeringly on the circumference. With this definition as the rule of searching calculation' s ending,a fast numerical algorithm of gaining the minimum ring-band of a closed curve was suggested:Make a ring-band with the four points scattered staggeringly,then replace the old points with new ones continuously until all the points are located within the ring-band. The method was used in an application example to measure the spindle rotating precision of machine tools.     

Antioxidant,anti-amylase and anti-glycation potential of brans of some Sri Lankan traditional and improved rice (Oryza sativa L.) varieties

Brans of 23 traditional and 12 improved (both red and white) rice varieties in Sri Lanka were screened for anti-amylase and anti-glycation activities in vitro. Varieties which showed the highest inhibitory activities at screening were further investigated for anti-glucosidase and glycation reversing as anti-diabetic properties. The same varieties were studied for selected antioxidant properties. Significantly high anti-amylase and anti-glycation activities were observed for bran extracts of red varieties compared to white varieties at screening. Traditional red rice varieties, Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti, exhibited significant and dose dependent anti-amylase, anti-glycation and glycation reversing activities. These varieties also showed marked antioxidant properties. It is concluded that brans of Sri Lankan traditional red rice varieties Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti may be potential food supplements for diabetes.