HPLC法同时测定滋阴温阳活血颗粒中两种指标性成分的研究

目的：建立滋阴温阳活血颗粒中两种指标性成分（腺苷和山奈酚-3-O-β-D-葡萄糖苷）的同时测定方法。方法：采用HPLC法,选用phenomex Kinetex C_{18色谱柱（4.6mm×250mm,5μm）,0.1%磷酸-乙腈为流动相,梯度洗脱,流速1.0ml/min,柱温30℃,进样量10μm,检测波长254nm;以腺苷和山奈酚-3-O-β-D-葡萄糖苷为指标性成分,共测定10批滋阴温阳活血颗粒。结果：10批颗粒中,腺苷的含量在2.706～4.132mg/g范围内,山奈酚-3-O-β-D-葡萄糖苷的含量在3.692～4.948mg/g范围内。结论：本研究所建立方法快速、准确、高效,能够对滋阴温阳活血颗粒的质量进行科学评价。}     

个旧锡矿印支中晚期海底基性火山-沉积Sn-Cu-Zn(Au)矿床成矿雏议

个旧锡矿长期以来在花岗岩成因模式指导下进行找矿,曾取得了显著的找矿效果.近年来,随着研究和勘查工作的深入,个旧锡矿的非花岗岩成矿作用也日益受到了重视.在全面研究和总结个旧锡多金属矿区成矿理论的基础上,以系统论为指导,以成矿系列研究为切入点,探讨了印支中晚期海底基性火山-沉积Sn-Cu-Zn(Au)矿床成矿观点,并论述了该类型矿床的地质地球化学特征.     

东营市城区馆陶组热储回灌性能分析

东营市城区馆陶组热储为新近系松散碎屑岩层状热储,目前地热资源开采量约95万m3/a,回灌是解决热储压力下降与地热尾水排放对环境造成不良影响的最佳措施,该文采用自然回灌试验方法探讨回灌条件下馆陶组热储的渗透性能,并与德州市城区馆陶组热储压力回灌试验成果进行了对比,对该热储的回灌性能进行了分析,为指导该区地热回灌提供了科学依据。     

盆地流体中有机组分的成矿效应

盆地流体含有丰富的有机组分。有机质-金属耦合作用是盆地流体金属成矿机制的关键,具有极其重要的意义。有机质的成矿作用主要表现为：1)沉积有机质对盆地流体物理化学特征的制约;2)有机组分对金,属成矿元素在盆地流体中的迁移能力、迁移形式以及沉淀就位机制的制约;3)富有机质的地层作为地球化学还原障和H2S障对于流体中金属沉淀就位的制约;4)沉积有机质的演化对于盆地流体运移的制约(通过油气的阵发性析出和二次孔隙的产生)。     

多步分解法初步研究石英砂中甲烷水合物p-T稳定条件

设计加工了一套研究海底沉积物水合物稳定条件实验装置,采用多步加热分解的方法对不同孔隙度的石英砂沉积物甲烷水合物相态平衡点(p-T稳定条件)进行了初步研究。为校验实验装置和实验方法,首先对甲烷水合物在十二烷基硫酸钠(SDS)溶液中的生成和分解过程进行了研究,获得的实验数据与文献数据吻合得很好。在此基础上,以4种不同粒径(96~180μm、180~380μm、212~380μm和380~830μm)的石英砂为介质,分别研究了甲烷水合物的p-T稳定条件。结果表明,实验测得的数据与纯水溶液中的结果基本一致,说明在实验所用的不同粒径石英砂构成的孔隙尺度内,毛细管作用对水合物相态点的影响可以忽略。     

0509号台风暴雨过程分析与暴雨灾害评估

针对2005年8月8～10日辽宁区域性台风暴雨过程,以常规气象资料、自动站资料及卫星云图资料为基础进行分析。结果表明:暴雨是台风、副热带高压与西风槽相互作用的结果,较好的水汽条件是产生台风暴雨的重要条件之一,低空急流是水汽输送的通道,也是台风暴雨的明显特征之一;结合单站气压连续变化以及云系变化判断“麦莎”登陆时间地点;应用基于概率分析的暴雨事件快速评估模型对暴雨灾害进行评估,评估表明暴雨过程为三级暴雨灾害,属中度级别。     

土壤墒情观测常见问题及排除经验

针对土壤墒情观测编发报及应用中常遇到的问题,寻找问题的排除方法。     

http://www.sciencedirect.com/science/article/pii/S1674987111000405

This study has focused on the processes of soil degradation and chemical element concentration in tea-growing regions of Rwanda, Africa. Soil degradation accelerated by erosion is caused not only by topography but also by human activities. This soil degradation involves both the physical loss and reduction in the amount of topsoil associated with nutrient decline. Soil samples were collected from eleven tropical zones in Rwanda and from variable depth within each collecting site. Of these, Samples from three locations in each zone were analyzed in the laboratory, with the result that the pH of all soil samples is shown to be less than 5 (pH < 5) with a general average of 4.4. The elements such as iron (Fe), copper (Cu), manganese (Mn), and zinc (Zn) are present in high concentration levels. In contrast calcium (Ca) and sodium (Na) are present at low-level concentrations and carbon (C) was found in minimal concentrations. In addition, elements derived from fertilizers, such as nitrogen (N), phosphorous (P), and potassium (K) which is also from minerals such as feldspar, are also present in low-level concentrations. The results indicate that the soil in certain Rwandan tea plantations is acidic and that this level of pH may help explain, in addition to natural factors, the deficiency of some elements such as Ca, Mg, P and N. The use of chemical fertilizers, land use system and the location of fields relative to household plots are also considered to help explain why tea plantation soils are typically degraded.     

Advance of research on modern soil phytolith

Phytolith study is a new branch of micropaleontology with an increasingly important role in geology, archaeology, and plant taxonomy. Phytoliths have several advantages considering their characteristics of small particle size, high production, wide distribution, anti-decomposition, in situ deposition, distinctive morphologies, and element sequestrating capacity. Phytolith assemblages in modern soil have been found to be closely related to modern vegetation types and climate conditions, which forms the basis for the quantitative study of paleoecology, paleoclimate, and bio-geochemical cycles. At present, phytolith studies generally focus on the following four aspects: (1) Morphology: about 260 unduplicated types of phytoliths have been identified in modern soil, of which 110 types are from grasses, 50 types from ferns, woody plants and other angiosperms, whereas the origin plants of the remaining 100 types are still under investigation. (2) Soil phytolith assemblages and vegetation: phytolith assemblages from the topsoil have been used to distinguish surface vegetation types including different forests and grasslands over a typical region. This model has been applied to restore past vegetation conditions and monitor the dynamic evolution of specific vegetation types at different temporal and spatial scales. (3) Soil phytolith assemblages and climate: quantitative and semi-quantitative relationships between phytolith assemblages and a series of climate parameters, such as annual mean temperature, annual mean precipitation and altitude, have been established through mathematical analysis. In this manner, quantitative reconstruction of paleoclimatic parameters has been achieved through the phytolith-climate transfer function model. (4) Soil phytolith and its sequestered elements: in this topic, the content of soil PhytOC (Phytolith-occluded Organic Carbon) and the importance of PhytOC in the bio-geochemical cycle have been the focus. The study of modern soil phytoliths has provided new approaches and many successful cases for solving specific problems in various fields, such as Earth science and archaeology. This study analyzed existing issues in addition to the abovementioned significant progresses, and provides directions for future research on modern soil phytoliths.