A Highly Activated Mineral Admixture Slurry Consisting of a Wet discharged Fly ash and Carbide Lime Composite

To recycle wet discharged fly ash and carbide lime effectively, a highly activated mineral admixture slurry consisting of both these components was investigated. The preparation technology of mineral admixture slurry made from a composite of wet discharged fly ash and carbide lime and the strengths, hydration products change (XRD, SEM) of cement paste made by the slurry were studied. The results indicate that the optimal proportion between wet discharged fly ash and carbide lime (solid content) is 75:25 in the process of wet milling preparation. The alkaline environment provided by carbide lime with high Ca(OH)2content and cement hydration accelerated by modified agents can promote early activation of fly ash, and accelerate its secondary hydration reaction.     

Effect of Microorganisms on Some Engineering Properties of Silt

The microbiology was introduced in foundation treatment. Several Carbonate mineralization microorganisms and polysaccharides viscose microorganisms were screened and the microorganisms No.ATCC 6453,3,polysaccharides viscose microorganisms 5 and 6 were used in silt modification. The engineering properties of silt before and after modification were compared by unconfined compressive strength test and indoor seepage test. The microstructures of silt incorporating different microorganisms were analysed by mean of scanning electron microscope and energy dispersive X ray (EDX) analysis. And the modification mechanism of silt has been revealed. These studies indicate that certain engineering properties of silt can be improved by incorporating microorganisms.     

Mechanism and Influencing Factors of Concentrated Phosphate Removal by Calcite

The phosphate removal mechanisms of Calcite were investigated with the tests of X ray diffraction (XRD) analysis, transmission electron microscope (TEM) measurement, fourier transform infrared spectroscopy (FT IR) analysis , specific surface area by Brunauer Emmett Teller(BET) method and pole size distribution by Barrett Joyner Halenda(BJH) method. The main influencing factors on phosphate removal were investigated and the removal mechanism was approved. It was shown that phosphate removal efficiency was significantly influenced by reaction time, temperature, pH value and dosage of calcite. And with BET, BJH and TEM tests, no porous materials, less than 16.0 m2/g for the specific surface area and below 0.085 cm3/g for total pore volume, were found during the reaction process so as to prove that absorption was not the main way of phosphate removal. And based on XRD and FT IR tests, it was found that chemical precipitation was the main way of phosphate removal which contained two steps: the formation of CaHPO4·2H2O(DCPD) and its transformation to ACP, and the controlling step was DCPD’s transformation to ACP.     

我国古代蝗灾社会反应机制定型期研究

概述了南宋以前各代应对蝗灾的措施,从积极和消极2方面探讨了南宋蝗灾的社会反映机制,指出了蝗灾反应机制在南宋最终定型,并成为南宋以后各代的基本模式。     

白于山区能源开发对当地农村发展的影响研究

以访谈的形式对陕北靖边白于山区产油区的黑敦梁村与非产油区的张天赐村进行调研,从村民生活质量、思想意识、就业结构、人居环境4方面详细比较了能源开发对农村发展的影响,并探讨了能源开发对乡村政府的影响最后对协调油田与村民关系、调整政府行为提出了建议,以便当地持续发展,并为类似地域提供参考。     

生防绿僵菌研究进展

就绿僵菌属的分类、绿僵菌侵染机制、与入侵相关的重要酶以及生防制剂的开发进行了综述,在此基础上对绿僵菌应用存在的问题及时策进行了探讨。     

核桃青皮中低极性组分抗TMV作用机制研究

为揭示核桃青皮中低极性组分的抗病毒机制,本研究以核桃青皮中低极性组分为处理药剂对烟草花叶病毒(TMV)进行预防和治疗处理,测定了K326叶片中与抗病毒性相关的部分生理生化指标的变化.结果表明,核桃青皮中低极性组分预防和治疗处理均可使K326叶片内的叶绿素和可溶性蛋白含量升高,MDA含量降低.POD和PPO的活性增强,可见,核桃青皮中低极性组分可诱导植物产生抗病性,增强烟草对TMV侵染的抵抗力.     

水稻耐低磷研究进展*

 水稻耐低磷特性的研究和利用将成为解决多年来磷肥施用造成的环境污染和挖掘利用土壤潜在磷的有效途径之一。长期的低磷胁迫压力,使水稻进化了形态学、生理生化、分子生物学等方面的一系列耐性机制来扩大对土壤无效磷的活化吸收,对水稻耐低磷筛选指标、耐低磷基因源地理生态及磷素的体内运筹、耐低磷基因的时空表达特性等研究,有望推动水稻耐低磷的育种进程,产生巨大的经济效益和环境效益。     

不同蛋白质水平对本地肉鸡生产性能和营养物质吸收的影响

文章旨在研究玉米-豆粕型日粮含不同蛋白质水平对本地肉鸡生产性能及营养物质吸收的影响。试验采用单因素多重复设计,选3周龄健康与体重相近的AA肉鸡360只,随机分为3个处理组,每个处理3个重复,每个重复40只;试验期为7周,6周后进行代谢试验。各试验组饲粮蛋白水平分别为:19%、17.5%、16%。结果表明,饲粮中蛋白质水平为19%时对本地鸡生产性能有显著影响,其日增重、饲料效率显著高于蛋白水平为17.5%和16%组(P<0.05);与蛋白质水平为19%与16%相比,对钙的代谢率差异不显著(P>0.05)、对磷的代谢率影响差异显著(P<0.05)。试验表明了蛋白水平为19%时本地肉鸡的生长效果最好。     

类风湿关节炎治疗药物的分子作用机制研究进展

类风湿关节炎是慢性自体免疫性疾病,文章从作用于细胞因子及其受体、针对T淋巴细胞的清除、影响G蛋白偶联受体信号转导和Ras-丝裂原激活的蛋白激酶信号转导四个方面阐述了消炎免疫药物治疗类风湿性关节炎的分子作用机制。