黄精复方治疗气阴两虚型2型糖尿病32例临床观察

目的：探讨黄精复方治疗气阴两虚型2型糖尿病的临床疗效。方法：将气阴两虚型2型糖尿病患者64 例随机分为治疗组和对照组,每组各32 例。所有患者均采取饮食、运动等生活方式干预,对照组口服二甲双胍片治疗,治疗组在对照组基础上加用黄精复方治疗,疗程均为12周。观察2组综合疗效及治疗前后中医证候积分、体质量指数（BMI）、空腹血糖（FBG）、餐后2 h血糖（2hPG）、糖化血红蛋白（HbA1c）、空腹胰岛素（FINS）、胰岛素抵抗指数（HOMA-IR）、总胆固醇（TC）、三酰甘油（TG）、高密度脂蛋白胆固醇（HDL-C）、低密度脂蛋白胆固醇（LDL-C）的变化,记录2组不良反应。结果：总有效率治疗组为87.50%（28/32）,高于对照组的59.37%（19/32）,差异有统计学意义（P＜0.05）。2组中医证候积分、BMI、FBG、2hPG、HbA1c、FINS、HOMA-IR、TC、TG、LDL-C、HDL-C治疗前后组内比较及治疗后组间比较,差异均有统计学意义（均P＜0.05）。结论：黄精复方治疗气阴两虚型2型糖尿病可以缓解患者的中医证候,降低血糖、血脂,改善胰岛功能,从而提高临床疗效。     

华南晚二叠世层序—古地理及聚煤规律*

晚二叠世是地质历史中重要的成煤时期,在中国南方多个省区都形成了可采煤层。受海平面变化的影响,华南地区晚二叠世发育一套完整的陆相—海陆过渡相—海相含煤岩系。通过对野外露头及钻孔剖面资料分析,识别出了区域不整合面、下切谷底部冲刷面、河道间古土壤层和沉积相转换面等关键层序地层界面,以及依据海相石灰岩标志层横向分布规律反映的区域最大海泛面,同时结合前人关于华南地区地层对比及煤层对比方面的成果,将华南上二叠统划分为3个三级层序及9个体系域。利用单因素分析多因素综合作图法恢复了各层序中岩相古地理及煤层分布规律,结果表明:层序Ⅰ中煤层主要形成于潮控下三角洲平原以及潟湖潮坪环境,厚煤层的展布受这些沉积相带控制;层序Ⅱ中三角洲平原环境中煤层最厚,开阔台地煤层最薄,平面上煤层厚度表现为西部厚、中部次之、东部无煤的阶梯式递变;层序Ⅲ中煤层主要形成于三角洲平原环境,此时聚煤作用主要发生于华南西部的康滇古陆东侧,在华南中部及东部大部地区发育的浅海台地和深水盆地均不利于聚煤作用发生。     

上扬子陆块西南缘早—中元古代造山运动的地质记录

早—中元古代,上扬子陆块西南缘发育有河口群—大红山群、东川群、昆阳群—会理群为代表的3套浅变质火山-沉积岩系.已有的岩石学、地球化学、年代同位素数据指示了其大地构造格架及其演化史.在早—中元古代地层所夹的火山岩中,获得了4组SHRIMP U-Pb岩浆锆石年龄:1800～1600Ma、1600～1300Ma、1300～1100Ma、1100～1000Ma.结合沉积相、常量、微量、稀土元素地球化学分析,证明了上扬子陆块西南缘在早—中元古代也相应历经了4个演化阶段.1800～1600Ma,在大红山地区、河口地区、东川汤丹地区形成近东西向的裂谷盆地.1600～1300Ma,在东川因民地区表现为—被动陆缘下的伸张环境.1300～1100Ma,在菜籽园—麻塘地区为板内裂谷-洋盆,老武山地区为裂谷盆地.1100～1000Ma阶段,菜籽园-麻塘裂谷-洋盆向北俯冲或向北向南双向俯冲,在北边的天宝山地区和南边的富良棚地区形成火山岛弧,同时在扬子西缘也出现了1.0Ga左右(1007±14～1014±8 Ma)的同造山或同碰撞型花岗岩,表明此时康滇地区已经拼贴到一起,并与整个上扬子陆块Rodinia超大陆形成同步.     

Mineralogy and Mineral Chemistry of the Cretaceous Duolong Gold‐Rich Porphyry Copper Deposit in the Bangongco Arc,Northern Tibet

The Early Cretaceous Duolong gold‐rich porphyry copper deposit is a newly discovered deposit with proven 5.38 Mt Cu resources of 0.72% Cu and 41 t gold of 0.23 g t^?1 in northern Tibet. Granodiorite porphyry and quartz diorite porphyrite are the main ore‐bearing porphyries. A wide range of hydrothermal alteration associated with these porphyries is divided into potassic, argillic and propylitic zones from the ore‐bearing porphyry center outward and upward. In the hydrothermal alteration zones, secondary albite (91.5–99.7% Ab) occurs along the rim of plagioclase phenocryst and fissures. Secondary K‐feldspar (75.1–96.9% Or) replaces plagioclase phenocryst and matrix or occurs in veinlets. Biotite occurs mainly as matrix and veinlet in addition to phenocryst in the potassic zone. The biotite are Mg‐rich and formed under a highly oxidized condition at temperatures ranging from 400°C to 430°C. All the biotites are absent in F, and have high Cl content (0.19–0.26%), with log (X_Cl/X_OH) values of ?2.74 to ?2.88 and IV (Cl) values of ?3.48 to ?3.35, suggesting a significant role of chloride complexes (CuCl₂^‐ and AuCl₂^‐) in transporting and precipitating copper and gold. Chlorites are present in all alteration zones and correspond mainly to pycnochlorite. They have similar Fe/(Fe+Mg), Mn/(Mn+Mg) ratios, and a formation temperature range of 280–360°C. However, the formation temperature of chlorite in the quartz‐gypsum‐carbonate‐chlorite vein is between 190°C and 220°C, indicating that it may have resulted from a later stage of hydrothermal activity. Fe³⁺/Fe²⁺ ratios of chlorites have negative correlation with Al^IV, suggesting oxygen fugacity of fluids increases with decreasing temperature. Apatite mineral inclusions in the biotite phenocrysts show high SO₃ content (0.44–0.82%) and high Cl content (1–1.37%), indicating the host magma had a high oxidation state and was enriched in S and Cl. The highest Cl content of apatite in the propylitic zone may have resulted from pressure decrease, and the lowest Cl content of apatite in the argillic zone may have been caused by a low Cl content in the fluids. The low concentration of SO₃ content in the hydrothermal apatite compared to the magmatic one may have resulted from the decrease of oxygen fugacity and S content in the hydrothermal fluid, which are caused by the abundant precipitation of magnetite.     

Erosion effects on soil properties of the unique red soil hilly region of the economic development zone in southern China

Erosion can have a significant impact on soil properties in areas characterized by undulating topography. The spatial trends of soil properties and the availability of soil nutrients change with land use conversion. Most studies on these changes in China, however, focus on the natural or agricultural ecosystems. Little attention has been paid to unique changes, such as the conversion of natural or agricultural land to economic development zones. To this end, it has been determined that the properties of the surface soil in an economic development zone with unique topography characterized by large mounds of earth and stones in the red soil hilly region in China. The aim of this study is to characterize the overall level and spatial patterns of the concentrations of topsoil selected soil properties, including pH, cation exchange capacity (CEC), bulk density, soil moisture, soil organic carbon (SOC), soil nitrogen (N), soil phosphorus (P), and soil potassium (K). Results show that the mean pH and CEC of soils is as low as 5.35 and 6.47?cmol?kg^?1, and the mean value of soil moisture is 0.30?g?g^?1, and the mean level of bulk density is 1.45?g?cm^?3. SOC and total P are as low as 5.89 and 0.35?g?kg^?1, while total N and total K have a high level of 8.44 and 25.2?g?kg^?1. The mean level of alkali-hydrolyzable N, Olsen P, and available K is 54.33, 6.35, and 120.33?mg?kg^?1, respectively, all at intermediate or low levels according to the Second National Soil Survey. All selected soil properties and nutrients have overall similar spatial patterns with the highest value on the lower slope positions except for alkali-hydrolyzable N. The results are most likely governed by the native properties of red soil, zonal climate, agricultural history for all the soils, and different degrees of soil erosion, and the probable impact of human activity like construction among different slope positions. Results indicate that (1) topography influences soil properties, as evidenced by the different spatial trends of the soil nutrients, and (2) human activity, especially construction, affects the soil properties of economic development zones. This study aims to provide valuable insights for the evaluation of soil quality as a prerequisite for land use planning in economic development zones.     

Trace metals in porewater of surface sediments and their bioavailability in Jiaozhou Bay,Qingdao, China

Samples of porewater and the edible tissue of mottled clams, Ruditapes variegatus, were collected simultaneously at each of 12 stations from Jiaozhou Bay near Qingdao, China, in June of 2003. Chemical analysis focused on trace metals and major elements. Porewater concentrations of Cd, Cr, Pb, and Zn were distributed in a bimodal fashion among the 12 stations, with mean concentrations at six of the stations being 8–32 times mean values at the other six stations. The concentrations of the same metals in clams were remarkably similar among stations, the coefficients of variation being only 12–37%. Calculations performed with the computer program PHREEQC indicated that Pb and Cr in porewater were present only in the +2 and +3 states, respectively, and because dissolved Cd and Zn exist only in the +2 state, the bimodal distribution of these four metals likely reflects secondary effects associated with their scavenging by Fe and/or Mn under oxidizing conditions and subsequent dissolution in the reducing environment of the porewaters. Consistent with this hypothesis is the fact that the distribution of high and low metal concentrations was closely correlated with the granularity of the sediment, with lower metal concentrations associated with relatively coarse sediment. Comparison of published biological concentration factors with the ratios of metal concentrations in the clams to porewater metal concentrations indicated that the porewaters were not the primary sources of the metals in the clams. Mixing processes in the bay likely account for the rather uniform concentrations of metals in clam tissue.     

滨海湿地咸水冲淡驱动机理

海陆界面水体相互作用研究是当代国际海岸带生态水文学的热点.滨海湿地的生态水文环境脆弱,浅层地下水及盐度梯度变化对其生长和发育起着控制作用.咸水冲淡驱动力主要是地下水动力作用、盐度驱动下的水化学运动作用和海洋潮汐作用的叠加效应.通过国内外学者近30年的研究成果分析了滨海湿地咸水冲淡研究程度及进展情况,认为掌握咸水冲淡驱动...     

西藏色布塔铜钼矿床中辉钼矿Re-Os定年及其成矿意义

色布塔铜钼矿床位于冈底斯成矿带北部,具有细脉浸染状矿化,围岩蚀变发育等斑岩型铜钼矿床特征.本文使用电感耦合等离子体质谱仪TJA X-series ICP-MS对色布塔铜钼矿床的花岗斑岩中的辉钼矿进行ReOs同位素定年研究,获得了6件样品的模式年龄为87.52±1.35～88.8±1.26Ma,等时线年龄为88.8±1.5Ma.本文研究成果表明,色布塔铜钼矿成矿时代为晚白垩世早期,属燕山期构造-岩浆活动的产物.     

莱芜市用地瓶颈措施问题解析

当前,国家收紧地根,从严控制新增建设用地指标成为各地建设项目顺利落地的制约瓶颈。为破解这一难题,结合莱芜实际,分析了规划修编、指标利用、挖潜存量、加快供地等做法,对保障项目用地提出了建议和对策。     

MULTIPLE ISLAND ARC-BASIN SYSTEM AND ITS EVOLUTION IN GANGDISE TECTONIC BELT,TIBET

MULTIPLE ISLAND ARC-BASIN SYSTEM AND ITS EVOLUTION IN GANGDISE TECTONIC BELT,TIBET