Noble gases in corundum megacrysts from the basalts in Changle, Shandong Province, eastern China

This study presents noble gaseous data of the corundum megacrysts from the Cenozoic basalts in Changle, Shandong Province, eastern China. It is known that no noble gaseous data of corundum megacryst have been documented before. The 3He/4He ratios (1.13-7.37 Ra) of the corundums from Changle vary from atmosphere to MORB values; the 20Ne/22Ne (9.67-10.75) and 21Ne/22Ne (0.0280-0.0372) data define two linear trends on Ne three-isotope diagram, respectively, along the MFL and the correlation line between atmosphere and MORB; the 38Ar/36Ar (0.177-0.194) ratios, the 40Ar/36Ar (280.9 -404.2) ratios and the 128-136Xe/132Xe ration with obvious 129Xe excess are generally higher than at-mospheric component, but the 40Ar/36Ar ratios are much closer to atomospheric ratio. The isotopic compositions of noble gases (particularly for He and Ar) of the corundums are similar to those of py-roxene, anorthoclase megacrysts, and mantle-derived xenoliths from this area, and those of man-tle-derived xenoliths from several areas in eastern China. Therefore, the noble gases trapped in the corundums probably are from mantle source, representing a ‘mixed fluid' produced by the interaction between the lithospheric mantle and fluids releasing from the convective plate. Both the noble gas isotopic compositions and the oxygen isotopic compositions of the solid corundums are not the characteristics of crustal source. These suggest that the corundums crystallized from mantle-derived magmas with minimal crustal contamination.     

Concentration level and distribution of polycyclic aromatic hydrocarbons in soil and grass around Mt. Qomolangma, China

High mountains may serve as a condenser for persistent organic pollutants. In the present study, soil and grass samples from Mt. Qomolangma region, China were collected from 4600 to 5620 m a.s.I and were analyzed for polycyclic aromatic hydrocarbons （PAHs） to determine if they are concentrated at colder, more elevated sites and to evaluate their possible resources and fractionation. The total PAHs concentration in soil samples was 〈 600 ng g^-1, the critical value to differentiate PAHs levels in remote and urban regions. This implied the PAHs levels at Mt. Qomolangma are relatively low and what one might expect in such a remote region of the world. These low values may represent a soil background for mid-latitude Northern Hemisphere soils away from the direct influence of an anthropogenic source. As for the distribution pattern, the low molecular weight PAHs were prone to accumulate at higher altitude, while the high molecular weight PAHs inversely related or unrelated with elevation. Based on high concentration of phenanthrene at elevated sample site and the ratios of individual PAHs, we deduced that home-heating combustion and vehicle emission may result in the constitution trait of PAHs in this mountain region. Monsoon traveling over India, Pakistan and other countries with dense population may carry contaminant to Mt. Qomolangma region.     

野生葛仙米矿物元素富集探讨

用电感耦合等离子体原子发射光谱法(ICP-AES)测定野生葛仙米、葛仙米生长环境地土壤表层及灌溉用水中部分矿物化学元素,结果表明各种矿质元素在葛仙米(干品)中的质量分数由高至低顺序依次为Ca、Mg、Fe、Sr、Mn、Zn、Cu、Co,其中Ca为34 030μg/g,Mn为129.1μg/g,Co为3.1μg/g,Sr为517μg/g;葛仙米Ca与土壤中Ca有明显的正相关关系,土壤中的Ca很容易被葛仙米同化吸收.葛仙米中的Sr与土壤和水中Sr有极明显的正相关关系,Sr非常容易被葛仙米富集;河水水源未检测出Mn、Zn、Cu.     

论铜绿山矿金云母矽卡岩含矿性

对铜绿山矿区金云母矽卡岩的形成机理进行了分析,并根据成矿元素的地球化学特性,阐明了金云母矽卡岩与特定金属矿石类型的内在联系.     

包结化合物对痕量金属离子的富集作用

本文以环氧氯丙烷为交联剂与β-环糊精反应，合成了环糊精聚合物。该聚合物能与2一萘偶氮-8-羟基喹啉-5-磺酸形成稳定的包结化合物，在适当的条件下，它可以选择性地富集锌离子，结果令人满意。     

NFATc3敲除对肝癌细胞转录组的影响及其潜在靶基因的初步筛选

目的 探究NFATc3基因敲除对肝癌细胞转录组的影响，并对NFATc3调控的靶基因进行初步筛选，以期为明确NFATc3靶基因及寻找新的抗肝癌治疗靶点提供依据。方法 利用敲除NFATc3的SMMC7721细胞，在有或无仙台病毒(Sendai virus, SeV)感染时进行转录组测序(RNA sequencing, RNA-Seq)检测，并对差异表达基因进行GO和KEGG富集分析。对两组测序数据差异基因交集中的免疫相关基因进行PPI蛋白网络互作分析，并利用qRT-PCR实验验证敲减或过表达NFATc3对肝癌细胞内S100A8和S100A9表达水平的影响。利用数据库数据，分析肝癌中S100A8和S100A9 mRNA表达水平及预后。结果 经RNA-seq分析发现，肝癌细胞中NFATc3敲除后差异表达基因主要富集在发育、代谢、细胞外基质和血管生成等通路。PPI蛋白网络分析发现S100A8和S100A9可能是NFATc3的重要靶基因。qRT-PCR实验结果显示敲除或敲减NFATc3均可上调S100A8和S100A9的表达，而表达外源NFATc3则可下调S100A8/S100A9的表达。数据库分...     

沾化凹陷罗家鼻状构造油气运移富集规律研究

近岸水下扇储集砂体是中国陆相含油气盆地碎屑岩储集体的重要组成部分。该文在对沾化凹陷罗家鼻状构造沙四上段沉积微相、生油岩条件和生储盖组合综合研究基础上 ,详细论述了稠油的形成机制 ,总结了该区油气运移和富集规律。通过对沙四上段储层的综合评价 ,指出了区内下一步有利勘探目标