复合农林业模式是我省西部实现跨越发展的必然选择

本文针对吉林省西部面临的生态与经济问题，以生态经济理论为指导，对复合农林业概念、主要模式、发展前景进行了论述，提出复合农林业是实现吉林省西部跨越式发展的理想模式，并结合本省实际提出了有关对策和建议。     

小白菜小孢子培养胚状体的诱导

21个小白菜品种小孢子培养结果表明:适宜的花蕾长为2.5~3.5mm,花瓣与花药长度比为1/2~3/4;0.05~0.10 mg.L-1的细胞分裂素能促进小孢子胚的发生,高于此浓度的细胞分裂素对小孢子胚的产生有抑制作用,并使小孢子胚向畸形化发展;0.05mg.L-16-BA 0.10 mg.L-1NAA的配比可以明显提高成熟胚的比例。     

果蔬汁加工技术进展

我国是水果和蔬菜生产大国,产量均居世界第一位。发展果蔬汁产业可以提高果蔬的附加值,具有明显的经济和社会效益。近年来,我国果蔬汁的加工技术取得了一定的进步。介绍了近年果蔬汁饮料加工领域的新技术,以及果蔬加工的发展方向。     

基于生化数据处理模型的测控软件开发策略

为改变国产生化分析仪器测控软件功能单一的落后状况,针对非生化检测专业的软件开发人员提出了一种基于生化数据处理模型的测控软件开发策略。详细地分析了软件总体结构、测试机理和数据库操作方面的策略内容,对于生化数据的处理和分析提出了三种数据处理模型,并设计了其中一种程序流程。     

公路草坪养护管理技术初探

为保证草坪绿化质量 ,延长其寿命 ,结合近年来在公路草坪施工与养护管理中积累的实践经验 ,对公路草坪的种类、生长习性 ,以及草坪建植后的浇水、除杂草、修剪、施肥、病虫害防治等养护管理技术进行了探讨与总结 ,以期为各地公路草坪绿化建设提供借鉴与参考。     

GRC构件在建筑装饰业的应用

本文系统地阐述了GRC构件的产品性能,施工工艺及方法、特点,展望未来建筑业外装饰的发展趋势。     

Inter- and intraspecific sequence variations of the chloroplast genome in wild and cultivated Raphanus

To assess the differentiation of the chloroplast genome in wild and cultivated species of Raphanus , nucleotide sequence polymorphisms were investigated for approximately 2 kbp ranging from trnL (UAA) to psbG in R. raphanistrum and R. sativus . Eighteen plants of wild species, 10 Japanese wild radish plants ( R. sativus ), and 31 cultivated plants were used for sequence analysis. Intraspecific variations of the chloroplast genome were present both in wild and cultivated Raphanus . All three genes investigated ( trnL , trnF and ndhJ ) contained nucleotide substitutions within the genus. Whereas, larger numbers of mutations were observed in the intergenic regions. Using the detected variations, the 59 radish plants were classified into 11 haplotypes, seven of which were unique to wild species. Among the haplotypes, one type corresponded completely with the Ogura male sterile cytoplasm. All the cultivated radishes belonged to one of four types, of which three were also observed in Japanese wild radish. The haplotypes were classified into four groups by cluster analysis, and the distribution in the dendrogram confirmed that cultivated radish has multiple origins. On the other hand, the seven haplotypes uniquely observed in R. raphanistrum were considered as useful materials to provide genetic diversity of cytoplasm for breeding of cultivated radishes.     

Application of Principal Component Analysis on Workable Competition Evaluation

The effective competition is an effective organizational form of the industry in modem market economy. It is a form accompanied with large - scale production and vigor competition. The analysis of effective competition has been the focus that people have paid close attention to it very much all the time. It is a basis of industrial policy, on the basis of the former research, the aufhors bring out 9 indexes according to the actual situation of our country, then take automobile trade as an example, we analyze the automobile trade with principal component.     

金属网与木单板的复合

本研究着重考察不同胶粘剂种类、不同金属材料和不同规格金属网，在不同组坯条件下压制复合板的电磁屏蔽性能。确定木单板与金属网的复合工艺，结果表明，板材的电磁屏蔽效能在1-1000MHz范围内可达到40dB以上；采用处理剂A处理金属网，可改善金属网与木材的胶合；复合板的胶合强度符合国家标准GB9846.12-88的要求。     

黄土丘陵沟壑区坡体稳定性影响因素分析

选取黄土丘陵沟壑区纸坊沟小流域为研究区,利用高精度遥感影像(分辨率0.068 m)和DEM (分辨率0.34 m)数据,结合野外调查,对崩塌、滑塌、滑坡、脱落和陷穴等失稳体进行识别,通过统计学、敏感系数方法,利用识别失稳体数据,分析不同类型失稳体空间分布状况,定量研究不同类型失稳体的影响因子敏感程度,揭示不同类型失稳体的主控因子,进一步阐明流域坡体失稳体的空间分布规律和影响坡体稳定性的主控因子。结果表明:(1)利用高精度遥感影像,获取流域失稳体,主要是以小规模和浅层的脱落、崩塌和滑塌为主,三者面积合计为0.417 km²,占流域总面积的5.04%。(2)评价因子内部中,土壤母质的红黏土、土地利用的天然灌木林地和草地、地貌部位的沟坡、坡度＞35°、地形起伏度为0.74~3.34 m是坡体失稳发生的高敏感区域,也是崩塌、滑塌、脱落和陷穴发育共有的敏感区域。(3)影响坡体稳定性主控因子权重由大到小为土壤母质、地形起伏度、坡度、土地利用和坡向。崩塌、滑塌和脱落的主控因子与整体坡体稳定性的主控因子相同,但因子内部权重存在差异。崩塌与整体坡体稳定性影响因子顺序分布一致。滑塌主控因子权重由大到小为土壤母质＞地形起伏度＝坡度＞土地利用＞坡向＞地貌部位。脱落主控因子权重由大到小为土壤母质＞土地利用＞地形起伏度＞坡度＝坡向＞地貌部位。滑坡的主控因子为坡度和地形起伏度。陷穴的主控因子权重由大到小为土壤母质＞地形起伏度＞坡度＞坡向。