三疣梭子蟹(Portunus trituberculatus)CYP2基因的cDNA克隆及表达分析

通过RT-PCR及Smart?TM Race技术,首次克隆了三疣梭子蟹(Portunus trituberculatus)CYP2基因cDNA全长序列。该基因cDNA全长1662bp,编码一个由492个氨基酸组成的多肽,预测理论等电点为6.348,分子量大小为56.68kD。氨基酸序列中含有CYP基因家族所特有的K螺旋保守序列(ExxR)和血红素结合区(FxxGxxxCxG)。经氨基酸序列比对及系统进化树分析发现,与岸蟹(Carcinus maenas)的同源性最高,达到75%。实时荧光定量PCR结果表明,CYP2基因在肝胰腺、鳃、肌肉、血淋巴、心脏和眼柄中均有分布,在肝胰腺中表达量最高。肌肉注射磺胺嘧啶后,三疣梭子蟹高、中、低三剂量组CYP2基因表达较对照组都有上调,并具有时间差异性,低剂量组表达量逐渐降低,趋于对照组,中剂量组和高剂量组表达量先升高后降低,6h后同一时间点,均是高剂量组表达最高,低剂量组最低。表明磺胺嘧啶可诱导三疣梭子蟹CYP2基因,CYP2基因可能参与三疣梭子蟹的药物代谢反应。     

Occurrence and characteristics of sporadic sodium layer observed by lidar at a mid-latitude location

Na lidar observations of SSL during the past 5 years at a mid-latitude location (Wuhan, China, 31°N, 114°E) are reported in this paper. From 26 SSL events detected in about 230 h of observation, an SSL occurrence rate of 1 event/9 h at our location was obtained. This result, combined with that reported by Nagasawa and Abo (Geophys. Res. Lett. 22 (1995) 263) at Tokyo, Japan, reveals that the SSL occurrence can be relatively frequent at some mid-latitude locations. The statistical analyses of main parameters for the 26 SSL events were made, and the results were compared with those previously reported. By examining the corresponding data from a nearby ionosonde, it was found that there was a fairly good correlation between SSL and Es. Of the 18 pairs of SSL and Es events checked, 15 of SSL were accompanied by Es, and 8 pairs of them were correlated within 1 h in time and within 5 km in altitude. From the analyses of observed perturbations during SSL development, the role of dynamic processes of atmosphere in the SSL formations were emphasized.     

陕西镇巴火焰溪法门阶牙形刺研究

陕西镇巴火焰溪剖面位于大巴山西段，临近川陕交界、交通便利。那里晚泥盆世地层出露完好，层序清楚，化石丰富。本文就该剖面法门阶牙形刺动物群、泥盆系石炭系的界线进行了研讨，建立了该区法门阶的两个浅水相牙形刺生物组合带。     

叠加变形有限应变分解及其应用探讨

本文提出了二维不同类型叠加变形的有限应变分解方法。只要测定有限应变及能代表各期主应变面的面理或剪切指向,就可以计算出各期构造应变。     

威海市杨家滩水源地地下水资源评价

本文分析了威海市杨家滩不源地第四系冲洪积－海相沉积物分规律和水文地质特征；在此基础上，应用有限单元方法进行了地下水量评价和预测水源地地下水位的变化趋势；提出了最优开采方案。     

鄂尔多斯西南缘前陆盆地沉降和沉积过程模拟

本文将东祁东逆冲带与鄂尔多斯西南缘晚三叠世前陆盆地相结合，研究了逆冲带内部变形特征，前陆盆地中层序地层格架特征及其反映的盆缘构造性质和幕式逆作作用。     

长江中下游成矿带钨矿床

长江中下游成矿带是我国重要的铜-铁-金多金属成矿带,近年来在长江中下游成矿带内发现多处白钨矿床和矿化点,为该成矿带的成矿学研究提供了新的研究课题。相比成矿带铜铁金多金属矿床研究程度,钨矿床成矿作用研究明显薄弱,尚未进行系统的成矿作用和成矿规律总结。成矿带内发育的钨矿床主要为北亚带的东顾山矿床、主带(中亚带)的阮家湾矿床和南亚带的桂林郑矿床和高家塝矿床。本文对这四个钨矿床及几个含钨矿床的地质和地球化学特征、成岩成矿时代、成矿岩体地球化学特征等方面的研究资料和成果进行了总结,讨论和试图阐明长江中下游成矿带钨矿床的成矿作用。研究显示,长江中下游成矿带存在三期钨成矿作用,分别为146～143Ma、127Ma和97Ma,在成矿带的铜主成矿期前和铁成矿期均有钨成矿作业发生。钨矿床中白钨矿的Sr-Nd同位素组成分别落入董岭式基底或江南式基底范围,表明长江中下游成矿带的董岭式和江南式基底是形成原始含矿岩浆的物质基础。长江中下游成矿带的钨矿床成矿岩体为中酸性岩,ε_(Hf)(t)值很低,且Zr/Hf、K/Rb比值小,表明成钨岩浆岩为古老地壳物质重熔并经历了较充分的分异演化,对比成矿带中成铜、成铁岩体,源区性质可能是导致长江中下游成矿带金属成矿差异的根本原因。燕山期的陆内俯冲是造成长江中下游成矿带钨矿床成矿的主导机制。     

Lateral extrusion along the Altyn Tagh Fault,Qilian Shan (NE Tibet): insight from a 3D crustal budget

The lithospheric strike‐slip Altyn Tagh Fault has accommodated hundreds of kilometres of displacement between the Qaidam and Tarim blocks since its Eocene reactivation. However, the way the deformation is accommodated in the Qilian Shan and further east remains uncertain. Based on 360 km of north‐eastward migration of the relatively rigid Qaidam block along the Altyn Tagh Fault and 3D isovolumetric balancing of the crustal deformation within the Altyn Tagh Fault–Qilian Shan system, we demonstrate that 250 ± 28 km (43.8–49.4%) of N20E directed crustal shortening and an additional ~250–370 km of eastward motion of the Qilian Shan crust must be accounted for by strike‐slip faulting in the Qilian Shan and crustal thickening in the Qinling area, as well as by extension in the adjoining North China block graben systems.     

Confidence Evaluation of Medium-and Long-Term Earthquake Prediction by Use of the Analytical Hierarchy Process

This paper offers an approach to the relative confidence level of medium- and long-term earthquake prediction methods by use of the analytical hierarchy process (AHP). We construct the criterion judgment matrices according to the results of an expert questionnaire known as the Delphi scheme. From the matrices we can obtain a scale for the relative preference or priority weight of each factor. The quantitative weights might be applied to make synthetic prediction of earthquake risk areas in the northern part of the North China seismic region.     

辽宁省“十五”数字化地磁数据分析系统

依据台站“十五”数字化地磁工作需求,结合地磁学科组运行管理的相关技术要求,研发辽宁省“十五”数字化地磁数据分析系统.该软件采用IDL作为开发语言,Oracle 10g数据库管理数据,主要包含用户管理模块、日志管理模块和数据管理模块3部分,具备数据实时处理、快速成像、操作简便、安全稳定等特点,可以有效解决目前台站地磁数据...