庐山自然保护区秋色叶树种观赏特性及其园林造景应用     

周庐萍  宗德欢  叶芳菲  符秀玉  邹芹  冯艳  庐俊 《江西林业科技》2012,(4):54-56

介绍庐山保护区秋色叶树种观赏特性,从造景的角度,探讨秋色叶树种在园林中的应用,并提出开发对策。  相似文献   

番茄裂果的原因及防治对策     

郑玲 《北京农业》2012,(21):93-94

番茄生产过程中,由于肥料的使用不当和水分灌溉多少直接影响番茄的裂果现象,针对出现番茄裂果,找出具体原因后对照症状,及时防治.  相似文献   

转基因油菜TOPAS 19/2质粒分子多家协同实验及不确定度评定     

柳方方  张玲  宋贵文  曹应龙  盛灵慧  黄峥  王晶  秦培勇  卢长明 《中国农业科技导报》2012,1(1):31-35

质粒分子是转基因产品核酸定量检测的一类新型标准物质,具有易制备、周期短、成本低等特点。采用实时荧光定量PCR技术,并协同7家实验室对转基因油菜TOPAS 19/2质粒分子进行了基因组的可替代性研究、协同实验研究及不确定度评定。T检验表明,质粒和基因组所产生的内源和外源基因标准曲线的斜率和线性相关系数没有显著性差异。对多家定值的数据进行了统计分析得出,TOPAS19/2质粒分子的量值结果0.910,扩展标准不确定度（K=2）为0.013。  相似文献   

蒸汽采暖系统中减压阀的选型与安装     

秦玲 《林业科技情报》2012,(3):44-45

介绍了各类减压阀的特点并进行了比较,论述目前蒸汽系统中减压阀选型的三种方法,并根据实践经验总结了减压阀的安装要点。  相似文献   

严寒寒冷地区游泳馆采暖节能设计浅析     

秦玲  赵翔  李宛泽 《林业科技情报》2012,(3):50-51

通过对严寒寒冷地区游泳馆室内环境的分析,提出了游泳馆采暖通风的设计要点和节能技术措施。  相似文献   

杂草稻对粳稻生长及产量的影响   总被引：4，自引：0，他引：4  

郭勋斌  陈伟民  顾克礼  冯长云  袁秦  余柳青 《杂草科学》2012,30(1):35-38

在同期播种情况下,和粳稻相比,杂草稻出苗时的叶片更肥长、营养生长期的植株更高、分蘖数多达4倍以上。不同生物型杂草稻的落粒性差异较大。杂草稻密度愈高对栽培粳稻的产量影响愈大。  相似文献   

2010年1-9月陕西省饲料工业发展形势分析     

赵辉文  叶玲  鲁毅 《饲料广角》2010,(21):23-25

<正>今年前3季度,陕西省饲料工业克服了饲料原料价格高位振荡运行和生产成本剧增的困难,积极应对,加快调整产品结构,努力拓展新市场,有力助推了饲料工业持续稳定发展。1饲料工业发展基本情况1.1饲料生产连创新高,产量产值持续增长据统计,陕西省前3季度饲料工业总产量达276.9万t,实现饲料工业总产值88.6亿元,分别比上年同期总产量261.7万t和总产值83.5亿元增长5.81%和6.11%。  相似文献   

Effects of notch1 gene on proliferation and cell cycle of human glioma U251 cells     

GUO Ya  ZHAO Neng-jiang  LIN Ling  ZHANG Ming-fang  ZHENG Zhi-hong 《园艺学报》2010,26(6):1115-1119

AIM: To investigate the effect of notch1 gene on the change of proliferation and cell cycle in human glioma U251 cell line. METHODS: The lentiviral vectors, which express notch1 shRNA or notch1 intracellular domain (NICD), were constructed and transfected into U251 cells, respectively. RT-PCR and Western blotting were applied to monitor the validity of down-regulation of notch1 expression and over-expression of NICD. MTT assay was performed to examine the cell proliferation. Flow cytometric analysis was used to detect the cell cycle. RESULTS: The lentiviral vectors, which expressed notch1 shRNA and NICD, were efficient in silencing notch1 expression and over-expression of NICD. Down-regulation of notch1 gene by RNAi inhibited the cell proliferation remarkably (P<0.01), arrested cell cycle at G1 phase (P<0.01) and decreased the cell number of S phase (P<0.01). Over-expression of NICD enhanced the cell proliferation significantly (P<0.01), promoted the cell cycle at G1 phase (P<0.05) and increased the cell number of S phase (P<0.01). CONCLUSION: notch1 gene, which leads to change the proliferation and cell cycle in human glioma U251 cell line, is likely to be potential molecular target for glioma in gene therapy.  相似文献   

Biological activity of the essential oil from the leaves of Piper sarmentosum Roxb. (Piperaceae) and its chemical constituents on Brontispa longissima (Gestro) (Coleoptera: Hispidae)     

Weiquan Qin  Shanchun Huang  Siting Chen 《Pesticide biochemistry and physiology》2010,96(3):132-139

The results showed that the essential oil from Piper sarmentosum has strong antifeedant and toxicity effects on Brontispa longissima. The best antifeedant and contact toxicity effects were observed in the 1st-2nd instar larvae. The essential oil also displayed a notable fumigation effect on the eggs and pupae of B. longissima. It took the control-treated insects 43.34 d to complete one generation, while the insects treated with 2000 mg/L essential oil needed 73.58 d. The essential oil was analyzed by gas chromatography/mass spectrometry and 41 components were identified. Myristicin (65.22%) and trans-caryophyllene (13.89%) were the major components. Myristicin exhibited strong antifeedant and contact toxicity effects on both the 3rd instar larvae and the imagoes of B. longissima, when it showed a significant fumigation effect on the eggs and pupae of B. longissima. Another P. sarmentosum essential oil and myristicin all showed a strong inhibiting effect on the growth and development of B. longissima along with the activity of AChE, CarE, GSTs and Na⁺, K⁺-ATPase in B. longissima larvae.  相似文献   

Establishment and characterization of fin cell lines from diploid,triploid, and tetraploid oriental weatherfish (Misgurnus anguillicaudatus)     

Xia Li  Chen Ma  Yan-Jie Qin  Ya-Juan Li  Di Wu  Li-Wen Bai  Ai-Jun Pei 《Fish physiology and biochemistry》2015,41(3):661-672

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