黄杨叶色特性初步研究

通过对3个黄杨品种(大叶黄杨、金心黄杨、金边黄杨)的叶绿素、类胡萝卜素、花色苷进行测定和分析,认为金心黄杨和金边黄杨的黄色部分不是由类胡萝卜素的绝对含量增加或类胡萝卜素与叶绿素比值的提高形成的,而是由于黄色部分总色素特别是叶绿素含量降低而造成的。     

COMPUTER ANIMATED DISPLAY AND ITS APPLICATION IN MODAL ANALYSIS

This paper expounds a method of realizing animated display of structure model by computer animation at the request of test model analysis. The following problem have been discussed. They are the construction of structural geometric model,data processing and interchanging, two dimensional graphical display of three dimensional structure and the generation of computer animation.     

蜂胶总黄酮含量快速测定方法的研究

利用微波技术加速蜂胶中黄酮类物质的浸出速度,从而达到快速检测的目的。通过实验表明,该方法操作简便,稳定性好,重复性高,可以作为对蜂胶原料及其产品质量的检测方法。     

马尾松净光合速率初步研究

本文研究了马尾松一年生苗的鳞叶及幼树１、２年生针叶的月龄与净光合速率的变化规律；马尾松天然更新树团的生境，生产结构，净光合速率及净生产力的变化。进一步论述了马尾松的光合生态特性，并据此对马尾松育苗，培育过程中抚育管理措施制订及实施的最佳时段进行了论证。     

海塘盐土种竹的初步研究

讨论了在中盐中碱盐土（含盐量０．３０％～０．５０％，ｐＨ８．０１～８．９９）上引种角竹、雷竹的技术，采用及时中耕、地表覆盖、增施有机肥料以及施用微量元素等改良盐碱土措施，加快脱盐、脱钙，提高盐土种竹的成活率。     

标准化提升出口蔬菜国际市场竞争力的实践与思考

阐述了蔬菜标准化有助于提高出口蔬菜国际市场竞争力的观点。通过农业部推出创建蔬菜标准化园活动及多年来逐步推进标准化建设实践经验与取得的效果,论述了标准化体系对于提高品质、缔造品牌、提高生产率、节本增效、菜农增收的基础作用;在剖析产品生产全过程的基础上,指出了标准化是提升蔬菜产品市场竞争力的有效措施,并强调了实施蔬菜标准化...     

夏秋茶资源开发利用现状、问题及对策

通过对目前夏秋茶资源开发利用现状及问题的分析,提出了解决夏秋茶的一些对策,如研究新工艺、开发夏秋茶新产品以及深加工产品,加强品牌建设、推行机械化采摘,增强政策扶持力度等,旨在为今后夏秋茶发展提供思路,推动茶产业的良好发展。     

Study on NO2 gas sensing characteristics of In doped ZnO thin films prepared by RF magnetron sputtering

In doped ZnO thin films were prepared on glass substrate by RF magnetron sputtering. The result of XRD and AFM shows that the films are polycrystalline with high c axis orientation. The study of gas sensing reveals that the films are sensitive to NO2 and the best sensibility occurs at 273 ℃; the sensibility is concerned with the concentration of NO2 and the film thickness. The ZnO∶In films are more sensitive to the NO2 gas with higher concentration of NO2 and thinner films have a better sensitivity. Exposed to 2×10-5 NO2 at 273 ℃, the 90nm thick film has a sensibility of 16, indicating that ZnO∶In films can be used to measure NO2 with a low concentration.