Use of antioxidant enzymes of clam <Emphasis Type="Italic">Ruditapes philippinarum</Emphasis> as biomarker to polycyclic aromatic hydrocarbon pollution     

朱琳  唐学玺  王影  隋亚栋  肖慧 《中国海洋湖沼学报》2016,34(2):416-421

The typical organic pollutant polycyclic aromatic hydrocarbon (PAH) anthracene was selected as a contaminant to investigate its effects on the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in the clam Ruditapes philippinarum. The results show that SOD, CAT and GSH-Px had diff erent induction and inhibition reactions to anthracene stress, and that three diff erent organs in R. philippinarum (visceral mass, muscle tissue and mantle) had diff erent sensitivities to anthracene stress. This study suggest that SOD activities of the visceral mass, CAT activitities of the mantle and the visceral mass, and GSH-Px activity of the muscle tissue could be used as sensitive indicators of anthracene stress in R. philippinarum.  相似文献   

Design and Implementation of the Hydrographic Production and Management Information System (HYPAMIS)     

Deren Li  Haigang Sui  Xinyan Zhu  Jianya Gong 《Marine Geodesy》2013,36(2):137-157

With the development of hydrographic work and information techniques, the traditional work mode is not suitable for the Chinese Marine Safety Administration Bureau (CMSAB). Aiming at the separation of charts production and management, a new idea that is the integration of production, management, and quality control is presented. Geographic Information System (GIS), Management Information System (MIS), Office Automation (OA) and Spatial Database Management (SDM) advanced techniques are introduced into the workflows in CMSAB. To realize information sharing, a mixed mode with Browser/Server (B/S) mode and Client/Serve (C/S) mode are adopted. Based on the above ideas and strategies, an integrated system named Hydrographic Production And Management Information System (HYPAMIS) was developed. The whole workflow and three subworkflows including survey management workflow, production workflow, and quality control workflow of are outlined after re-engineering the CMSAB organization. Some design principles and key techniques of the HYPAMIS including the cooperation of GIS and MIS, object-oriented spatial data model and management, data management based on database, and security control are illustrated in detail. Then the implementation of the system is introduced briefly. Finally, performance evaluation of the system and future work is given.  相似文献   

塔吉克斯坦主要岩金矿床   总被引：1，自引：0，他引：1  

隋延辉 《新疆地质》2010,28(1)

塔吉克斯坦岩金矿床分布于塔国中部、北部和帕米尔地区,主要集中在泽拉夫尚河流域.工业类型为单一型与伴生型金矿床,成因上多与岩浆岩(花岗岩、花岗闪长岩和闪长岩等)有关,金矿床主要发育于与岩浆有关的石英脉内.按产状可分为:塔罗型、吉劳型、乔列型和丘利博伊型4种,其中吉劳金矿为典型的大型网脉状金矿床.  相似文献   

实时GPS水汽探测技术中的电离层延迟订正     

王威  隋立芬  符养  黄贤源 《气象科技》2007,35(3):411-413

在水汽监测网中,利用精密预报星历得到的结果与精密星历的结果相差很小,因此可以采用精密预报星历进行实时的水汽探测。由于电离层延迟对水汽影响较大,因此必须加以消除。详细地介绍了Klobuchar模型、双频观测值求解电离层延迟和双频观测值线性组合无电离层延迟3种方法的推导过程。将3种方法消除电离层延迟的影响大小作一比较,认为双频观测值线性组合无电离层延迟是最好的方法。  相似文献   

森林择伐研究进展   总被引：8，自引：2，他引：6  

周新年  巫志龙  郑丽凤  邓盛梅  林海明  许少洪 《山地学报》2007,25(5):629-636

山地森林采伐应注重经济效益与生态效益的有机结合已成为共识。择伐能充分发挥每棵树木生长潜力,最大限度利用林地生产力,增加林分组成和结构的多样性,提高森林的抗病能力,有利于营养物质的合理循环,减小森林的破碎化程度,提高森林的防护效能,形成和谐的景观。择伐由于符合森林的自然演替规律和自然作业法则,因而越来越受到森林生态学家、生物学家、林学家和森林采伐学家的高度重视。针对国内外森林择伐研究新进展及其存在的问题,进一步探索适合我国森林择伐的理论和作业技术,指出我国今后森林择伐研究的对策及前景。  相似文献   

Reconstruction of cropland change in European countries using integrated multisource data since AD 1800     

Yu Ye  Jun Li  Xiuqi Fang  Diyang Zhang  Zhilong Zhao  Zhilei Wu  Yujie Lu  Beibei Li 《Boreas: An International Journal of Quaternary Research》2023,52(1):60-77

Credible historical land use/cover data are very important for past global change research. This study generates a set of integrated reconstruction methods based on multisource data and produces a new set of improved historical cropland data sets in Europe over the past 200 years. For AD 2000, FAO data, existing research results and statistical data are integrated. For AD 1900, a method of integrating two sets of independent historical agricultural land data by correction and validation and supplemented by other historical cropland data are developed. For AD 1850 and 1800, a methodological scheme of diversified proxy integrative technology and methods based on multisource data is constructed. In this new data set, quantitative reconstructions for AD 1900, 1850 and 1800 are improved to account for 100, 78 and 57% of all European countries, respectively. The reconstruction results show that each region in Europe has been in different stage of historical agricultural development. More than 86% of the countries’ cropland area and its proportion peaked in AD 1900 or did not exceed the data for AD 2000. Specifically, a high reclamation zone gradually formed from France to Ukraine, in which every country’s cropland fraction was ≥40% during AD 1800–1900. From AD 1900–2000, the highly cultivated region contracted, and the centre of higher cropland proportions shifted to eastern Europe and Poland, Czechia and Hungary. The cropland area was systematically underestimated by HYDE3.2, with a relative difference ratio of −20 to −30% between HYDE3.2 and this study. Historical empirical data were used for only 32% of countries in HYDE3.2. This method of multiproxy integrated reconstruction is applicable to other regions of the world and it would be worth attempting to apply it to earlier historical European cropland data sets in the future.  相似文献   

华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地研究新进展和潜力预测     

沈红钱  张遂  曾飞  谢小峰  杨炳南  谢兴友  蔡国荣  沈小庆  朱璞  姚希财  吴应值  杨俊 《贵州地质》2021,38(2):129-138

华南南华纪武陵锰矿成矿带松桃李家湾-高地-道坨地堑盆地控制形成了系列著名的大型-超大型锰矿床.本文依托2020—2021年实施的贵州松桃高地超大型锰矿床大精查(勘探)项目最新成果,运用锰矿气液喷溢沉积成矿理论与隐伏锰矿找矿预测技术体系,对该地堑中的含锰岩系、(富)锰矿体厚度、矿石品位等变化规律及气液喷溢矿石相特征进行综...  相似文献   

Pore Structure Characteristics and Their Diagenetic Influence: A Case Study of Paleogene Sandstones from the Pinghu and Huagang Formations in the Xihu Depression,East China Sea Basin     

Qu  Tong  Huang  Zhilong  Chen  Jinlong  Li  Tianjun  Dong  Jin  Li  Zhiyuan  Wang  Boran  Yang  Yizhuo  Guo  Xiaobo 《Mathematical Geosciences》2022,54(8):1371-1412

Mathematical Geosciences - This study evaluated the effects of different experimental methods and pore structure characterisation methods to establish a comprehensive pore structure evaluation...  相似文献   

黔渝毗邻区杨家湾-老木湾南华纪含锰地堑特征与找矿预测     

沈红钱  张遂  谢小峰  袁良军  杨炳南  朱璞  谢兴友  郑超  张平壹  张仁彪  姚希财 《贵州地质》2021,38(1):1-7

黔渝毗邻区杨家湾-老木湾南华纪含锰地堑系南华裂谷盆地(I级)中的武陵次级裂谷盆地(Ⅱ级)、松桃—古丈次级地堑盆地(Ⅲ级)中的众多Ⅳ级含锰地堑之一.运用锰矿裂谷气液流体喷溢沉积成矿理论与找矿预测模型,对该含锰地堑中的含锰岩系、锰矿体厚度等变化规律进行综合研究,圈定了杨家湾-老木湾IV级含锰地堑的空间分布范围.含锰地堑长轴...  相似文献