白菌僵分生孢子用于粉纹夜蛾幼虫的生物测定

本文记述了一种生物测定方法,能有效的用来测定昆虫病原真菌—白僵菌分生孢子制剂Beauveia bassiana(Bals)vuill,对取食用不同浓度的分生孢子表面处理叶盘上的粉纹夜蛾Trichoplusia ni(Hubner)一龄幼虫的毒力。48小时后,幼虫转移到未处理的半合成饲料上(温度25±1℃),五天后终止测定。这种生物测定的剂量—死亡率回归方程是:Y=2.1420 1.3352X。计算得出的致死浓度Lc20、Lc50和Lc80分别为每平方毫米上总分生孢子数32,139和590个。     

高粱产量及其它数量性状的遗传

1977年雨季在印度 Indore 进行的两个播期、两种肥力的随机区组试验(二次重复)中,种植 CSV_3、555(易感粒霉病)、IS9327IS9333、IS9530(轻感)、2219B、SPV29(中抗)及其全部可能组合成的 F_1。从单行小区内选取5株记载50%开花期、株高、单株籽粒     

温州地区野生悬钩子资源调查与开发利用

作者对温州地区的野生悬钩子资源进行调查、鉴别、分类，介绍了我市常见的有开发利用价值的几种悬钩子资源，并对目前存在的问题及今后的开发利用提出了一些建议。     

全球氮肥供应及需求展望（上）

影响氮肥消耗的主要因素有:人口增长、减少贫穷与改善营养不良的需要、农产品增长、人类饮食的变化、全球地区经济福利状况、耕地与水的可利用性以及有助于平衡、完善植物营养的政策。肥料的利用会被天气、种子发育、农业耕作实践及耕作体系、技术应用、农耕专业知识、环境管理     

胰岛素样生长因子1调节生长发育的研究进展

胰岛素样生长因子1(IGF-1)属于胰岛素类激素家族中的成员之一,是一种在分子结构上与胰岛素类似的多肽蛋白物质。对人和动物的生长、发育和代谢具有重要的调节作用。因此,IGF-1也被称作"促生长因子",或者生长激素介质。文章综述了IGF-1对生长发育调控作用及其涉及的相关细胞信号通路的研究进展。     

Magnetic property of loess strata recorded by Kansu profile in Tianshan Mountains

Kansu (KS) profile is located in the east of Yili basin, western Xinjiang, where typical loess sediments are distributed. The magnetic parameters (such as IRM, SIRM SOFT, and M) and grain size in the KS profile were analyzed in the study. The results showed that the magnetic property of KS loess is dominated by ferrimagnetic minerals, such as magnetite and maghemite. Antiferromagnetic and superparamagnetic minerals also exist in the profile, but had less impact on magnetic susceptibility. Compared with the typical loess sediments of the central Loess Plateau in China, the strata of Kansu profile contained more magnetic minerals and hard magnetic minerals. The analysis of grain size for magnetic minerals indicated that the properties of loess and paleosol were respectively dominated by PSD/MD and coarse SSD magnetite. The research found that the contents of magnetic minerals in loess and paleosol sequences in Kansu profile were similar, but the proportion of fine grained magnetite and soft magnetic minerals were varying, which implies a positive relationship between the value of magnetic susceptibility and intensity of pedogenesis.     

Experimental Investigation on the Aseismic Behavior of Seismic Damage Masonry Wall Retrofitted with Grouting and Steel Hoops

In order to accurately evaluate the aseismic behavior of the seismic damaged masonry pagodas destroyed by Wenchuan earthquake and strengthened after the earthquake, a test was conducted to acquire related parameters on seismic performance from the specimens made by masonry and retrofitted with grouting and steel hoops. Taking a seismic damaged ancient masonry pagoda in Sichuan as a case study, four kinds of primitive specimens are fabricated by simulating the conformation of the masonry pagoda. Then the primitive specimens are destroyed under cycle loads and the damaged specimens are repaired by grouting and steel hoops. Cycle controlling tests are conducted with the specimens and relevant data are acquired. Experimental results showed that grouting combined with steel hoops could improve the ductility and energy dissipation capacity of a seismic damage of brick masonry structure, but it do a little to improve the stiffness of a seismic damage structure. And the cracking load of the repaired masonry is much lower than the original undamaged structure.     

补肾化癖方对PCOS大鼠卵巢颗粒细胞 CYP450表达的影响

〔摘要〕目的观察补肾化疲方对多囊卵巢综合征(PCOS)大鼠卵巢颗粒细胞CYP450蛋白表达的影响〔方法 运用补肾化疲方对PCOS模型大鼠进行干预后,采用免疫组化法观察卵巢颗粒细胞CYP450的蛋白表达〔结果模 型组与正常组比较,卵巢颗粒细胞CYP450的蛋白表达在表达面积及表达强度上均低于正常组,差异具有统计学 意义(P<0.01);补肾化疲方中、高、低剂量组及妈富降组用药后,卵巢颗粒细胞的CYP450的蛋白表达明显升高,差 异具有统计学意义(P<0.01, P<0.05);其中补肾化疲方中剂量对PCOS大鼠卵巢颗粒细胞CYP450的蛋白表达效果 最佳、结论补肾化疲方能增强PCOS大鼠卵巢颗粒细胞CYP450的蛋白表达,调节卵巢内分泌失调,改善PCOS高 雄血症.逆转卵泡的发育异常.使排卵成功、     

补肾活血方对PC 0小鼠未成熟卵母细胞 体外核成熟的影响

〔摘要〕目的探讨补肾活血方对PCO小鼠未成熟卵母细胞体外核成熟的影响、方法(1)制备补肾活血方含药 血清;}2)制作PCO小鼠模型;}3)将PCO小鼠生发泡(germinal vesicle , GV)期卵母细胞分别在不同采血时间获取的 补肾活血方含药血清培养液中进行体外培养,观察补肾活血方含药血清对生发泡破裂(germinal vesicle break- down,GVBD)和第一极体(the first polar body,PBl)排出的时效关系结果(1)2 h和2.5 h药物血清组卵母细胞 GVBD的发生率高于正常血清组和对照组,培养后4 h差异有统计学意义(P<0.01) ; (2)2 h和2.5 h药物血清组卵 母细胞PB1的发生率高于正常血清组和对照组,培养后18 h差异有统计学意义(P<0.01)、结论2-2.5 h补肾活血 方含药血清对PCO小鼠未成熟卵母细胞体外核成熟具有明显促进作用、     

还少丹对老年小鼠脂褐素含量和 DNA分子结构稳定性的影响

〔摘要〕目的研究还少月一对老龄小鼠脂褐素含量和DNA分子结构稳定性的影响、方法将36只昆明种老年 小鼠(20月龄),按体质量随机分为3组,另设12只2月龄同种小鼠作为青年对照组,共4组:①老年对照组;②老 年还少月一组;③老年维生素E(VE)组;④青年对照组〔连续喂养10周后,采用荧光分光光度法测定脑组织的脂褐素 水平和肝组织DNA双链解旋剩余率;用紫外分光光度法测定肝组织DNA碱变性增色效应、结果青年对照组、老 年还少月一组、老年VE组的脂褐素含量明显低于老年对照组,差异有统计学意义(P<0.05;与老年对照组比较,青年 对照组和老年还少月一组的DNA碱变性增色效应明显降低,而DNA双链解旋剩余率显著增高,差异均具有统计学 意义(P<0.05,而老年VE组的差异无统计学意义(P>0.05、结论还少月一能有效降低脂褐素的含量,保护DNA结 构的稳定性,达到延缓衰老的目的、