黄曲霉毒素B_1胶体金快速定量检测试剂盒的研发

本研究旨在应用胶体金免疫层析技术,结合胶体金定量读数仪研制出一种快速定量检测谷物和饲料中黄曲霉毒素B_1含量的胶体金快速定量检测试剂盒。该试剂盒以胶体金标记高特异性单抗,与偶联抗原进行正交试验,确定适宜条件,同时通过与对照线和试验线的颜色对比,应用胶体金定量读数仪,对样本中黄曲霉毒素B_1含量进行定量检测。结果表明,黄曲霉毒素B1胶体金快速定量检测试剂盒检测方法简便、快速、稳定性好,且可得出具体数据,避免了人肉眼观察的差异;与常见霉菌毒素无交叉反应,样品检测结果与高效液相色谱法检测结果的相对误差在20%以内。由此可见,本试验研制的黄曲霉毒素B_1胶体金快速定量检测试剂盒可用于谷物和饲料中黄曲霉毒素B_1含量的快速定量检测。     

闽东南赤红壤铁铝特性与系统分类

本文对分布于闽东南沿海低丘－红土台地上９个赤红壤Ｂ层细土的Ｆｅｔ、Ｆｅｄ、Ｆｅｏ、Ｋ２Ｏ、ＣＥＣ７／粘粒、ＥＣＥＣ／粘粒和ＳｉＯ２／Ａｌ２Ｏ３等指标进行研究．在此基础上探讨了土纲、亚纲、土类和亚类的归属问题，并对诊断指标的修改意见提出建议．     

竹下脚料制备吸附黄金用活性炭

以竹下脚料为原料,通过正交试验法制取不定形颗粒炭,经检测其强度好,碘吸附值高,优于LY/T1125-1993《提取黄金用颗粒活性炭》标准A类(椰壳原料)指标,可作为椰壳活性炭的替代品用于黄金吸附,为黄金生产提供了新的活性炭品种。     

基于GARCH模型的黄金指数与美元指数波动性研究

近几年的黄金市场与美元指数市场波动都比较大,但波动的方向不一致。通过对两者的波动进行研究,主要有单位根检验、ARCH效应的检验、GARCH模型分析以及因果关系检验,结果表明,黄金指数GARCH(1,1)最适合描述其市场波动,美元指数GARCH（2,1）最适合描述其市场波动,美元指数的预测对黄金指数的预测会有帮助。     

静电喷粉技术在喷洒农药中的应用

介绍了涡轮静电背负喷粉机结构.由于该机采用了涡轮发电机、流化泵、内置高压发生器、TEC-恒流充电等技术,使得喷粉效果优与其它类型的静电喷粉机.通过对采用对比、玻片计数法获得的实验数据分析,其防治效果比常规喷粉效果提高了37,经济效益好而且环保,具有广阔的应用推广前景.     

俄罗斯沙棘在砂金过采区植被恢复中的应用试验

黑河地区砂金过采区水土流失、污染严重,利用俄罗斯沙棘进行植被恢复,有针对性地提出了当地治理环境、种植俄罗斯沙棘技术,可在同类地区试验推广.     

Soil Amendment Improves Tree Growth and Soil Carbon and Nitrogen Pools in Mongolian Pine Plantations on Post‐Mining Land in Northeast China

Mining activities leave large areas of post‐mining lands to be reclaimed. Increases in soil C and N pools and N availability are important to successfully reestablish trees on post‐mining land. In this study, we determined C and N concentrations and natural stable isotope of ¹³C and ¹⁵N in soil and plant in Mongolian pine (Pinus sylvestris L. var. mongolica Litv.) plantations 8 years after establishment on non‐mined land (NM), post‐mining land without soil amendment (NAM), and post‐mining land with soil amendment (AM) in a placer gold mining region of Northeast China. We found that the growth of Mongolian pine was significantly slower on NAM as compared with NM (decreasing by 73% in tree height and 63% in basal diameter), but tree growth improved on AM. Soil C and N concentrations, plant N concentration, and soil δ¹⁵N value decreased in the order of NM > AM > NAM, implying that soil N availability decreased in post‐mining land, but soil amendment could increase soil N availability. However, the values of δ¹⁵N in plant tissues of Mongolian pine were higher on NAM than on NM and AM, suggesting that soil inorganic N form absorbed by trees might be changed when trees were directly planted on post‐mining land with lower soil N availability. In addition, the values of δ¹³C in 1‐ and 2‐year‐old leaves of Mongolian pine were lowest when planted on NAM, indicating a decrease in intrinsic water‐use efficiency of Mongolian pine. Our results suggest that soil amendment helps us establish forests successfully on post‐mining lands. Copyright © 2015 John Wiley & Sons, Ltd.     

浅析美国存款保险制度

文章以美国存款保险制度为分析对象,进而总结由这些特征衍生出的美国联邦存款保险公司在金融体系中的特殊地位和功能.根据其特征和功能浅析了存款保险制度对宏观经济的积极影响.     

猪瘟胶体金免疫层析快速诊断法的建立及应用

运用胶体金免疫层析技术,建立一种操作简单、灵敏度高、特异性好,能区分强弱毒感染,适合临床诊断的检测猪瘟病毒的方法。本试验利用大肠杆菌表达猪瘟病毒E2蛋白作为弱毒抗原,利用PK15细胞培养纯化后的猪瘟病毒强毒用作强毒抗原,研制了胶体金免疫层析猪瘟病毒抗体检测试纸条。结果显示,经过37℃破坏,该试验方法制备的试纸条仍具有很好的稳定性;与间接血凝法、美国IDEXX酶免试剂比较,发现该试纸条灵敏度在一定程度上优于前者;用多种病毒、病原菌阳性血清考核,显示该试纸条亦具有较高特异性。该试纸条的研制为猪瘟的快速诊断提供了一种更加实用的方法。     

金属阳离子夹心三核金咪唑基化合物的电子结构和光物理性质

采用混合密度泛函方法,对一系列包含金属离子(Cr2+、W2+、Fe2+、Ru2+、Cd2+、Cu+、Ag+、Au+、In+、Tl+、Li+、Na+)的咪唑基三核金夹心化合物基态分子结构进行了优化;并采用含时密度泛函方法对这些夹心化合物的垂直激发态进行研究,描述了与发光过程相关的前线分子轨道特征.计算结果表明:夹心金属离...