检索结果-南通市图书馆

Petroleum Science 2023年第5期20卷 2637-2647页

作者： Xiao-Wei Zheng Niels-HSchovsbo Lei-bo bian Arka Rudra Hamed Sanei Lithospheric Organic Carbon(LOC)Group Department of GeoscienceAarhus University8000Denmark Department of Reservoir Geology Geological Survey of Denmark and Greenland(GEUS)Oster Voldgade 10Dk-1350Copenhagen KDenmark Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China

This work used organic geochemistry and organic petrology to study the depositional environment,organic matter characteristics,and thermal maturity of the Cambrian-Ordovician organic-rich marine shales in the Baltic *** main macerals in Cambrian samples include alginite,bituminite and solid bitumen,while zooclastic macerals become the major proportion of organic matter in the Ordovician *** the maturity increase,solid bitumen becomes abundant and ***-like maceral was observed only in Furongian of well DBH15/73,which probably indicates the local intrusion of Permo-Carboniferous dolerite *** programmed pyrolysis results show that immature,early mature,and over-mature samples are ***,the data of high-uranium Furongian samples were greatly altered by igneous intrusives from local *** calculation model is simulated based on pyrolysis data and fitted according to the least-square fitting *** simulated fitting HIo:400mg HC/g TOC(369.5 mg HC/g TOC,430.5 mg HC/g TOC as 95%confidence bounds)is within the worldwide marine shale HI_(o)and indicates a marine anoxia and transgressive sea with shallow water column(organofacies B).

关键词： Lower paleozoic Organic petrology Initial hydrogen index Original geochemical properties

在线全文

学校读者我要写书评

暂无评论

城市地表污染物累积模型研究

土木建筑与环境工程 2010年第6期32卷 137-141页

作者：边博江苏省环境科学研究院南京210036

城市地表污染物为城市面源污染的重要来源,科学认识和计算地表污染物是有效控制城市面源污染的关键。从2006年3月开始,选择镇江具有代表性的土地使用类型实测城市地表污染物,研究城市地表污染物累积变化规律。研究结果表明:地表污染物... 详细信息

城市地表污染物为城市面源污染的重要来源,科学认识和计算地表污染物是有效控制城市面源污染的关键。从2006年3月开始,选择镇江具有代表性的土地使用类型实测城市地表污染物,研究城市地表污染物累积变化规律。研究结果表明:地表污染物随着晴天时间的增长逐渐趋于上限值并呈周期性变化,根据"贮存-输入-输出"平衡原理,引入污染物输入速度系数和去除速度系数,建立地表污染物累积模型,通过与实测数据拟合和其他模型对比,模型计算精度较高,计算结果可作为城市地表污染物冲刷模型的输入,从而为城市降雨径流污染的控制和治理提供科学依据。

关键词：地表污染物平衡原理速度系数累积模型冲刷模型

A Baseline Correction Algorithm for FAST

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2022年第8期22卷 1-5页

作者： De-Jian Liu Ye Xu Ying-Jie Li Ze-Hao Lin Shuai-bo bian Chao-Jie Hao Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China

The Five-hundred-meter Aperture Spherical radio Telescope(FAST)is the most sensitive ground-based,singledish radio telescope on ***,the original HⅠspectra produced by FAST are affected by standing *** maximize the power of FAST for high-sensitivity observations,we proposed an algorithm that combines fast Fourier transforms and extreme envelope curves to automatically correct the baselines of FAST HⅠspectra and remove standing waves from the *** algorithm can reduce the amplified noise level caused by standing waves to a near-ideal level without losing signals or introducing false *** root mean square of the average baseline reaches~8 mK,approaching the theoretical sensitivity of an HⅠspectrum produced by FAST for an integration time of 335 minutes,i.e.,~6 m K.

关键词： methods:observational techniques:spectroscopic telescopes

The investigation of the stability of DNA-b-PPO vesicles formed through frame guided assembly

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2018年第12期61卷 1568-1571页

作者： bo bian Yi-Yang Zhang Yuan-Chen Dong Fen Wu Chao Wang Shuo Wang Yun Xu Dong-Sheng Liu Department of Chemistry Tsinghua University College of Chemistry and Materials Engineering Wenzhou University Center for Medical Device Evaluation China Food and Drug Administration (CFDA)

Frame-guided assembly is a novel assembly method which can control the shape and size of vesicles accurately. It has been reported that the DNA-b-PPO vesicles could be stable over two weeks. In this communication we have introduced restriction sites of EcoR1 in the interior DNA scaffold to the formed vesicles in order to further study their stability. Dynamic light scattering(DLS), transmission electron microscope(TEM) and fluorescence spectrum were used to characterize the digestion process. The final results revealed that the vesicles were still stable even after two weeks cultivated with EcoR1, which suggests potential in future biological applications.

关键词： frame-guided assembly vesicles stability restriction sites EcoR1

Upregulation of Zip14 correlates with induction of endoplasmic reticulum stress(ERS)in hypertrophied hearts of Dahl saltsensitive rats

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2022年第3期46卷 667-675页

作者： JINYONG HUANG TIANMING TENG bo bian YUCHEN XUE LONGFEI HUANG ZHELONG XU QING YANG YUEMIN SUN Department of Cardiology Tianjin Medical University General HospitalTianjin300052China Department of Physiology&Pathophysiology Tianjin Medical UniversityTianjin300070China

Zinc is a trace element involved in maintaining cellular structure and *** zinc is associated with left ventricular hypertrophy(LVH),there have been few reports on this *** study aimed to evaluate the correlation between Zip14 and expression of endoplasmic reticulum stress(ERS)associated molecules in hypertrophied hearts of *** salt-sensitive rats were fed a high salt diet to establish a left ventricular hypertrophy(LVH)rat ***-PCR was used to determine Zip14,activating transcription factor(ATF4),ATF6,x-box-binding protein 1(xBP1),C/EBP homologous protein(CHOP),immunoglobulin-binding protein(BiP)mRNA *** blotting was used to evaluate Zip14,BiP,CHOP,GAPDH *** levels were measured by Inductively Coupled Plasma Optical Emission *** results indicated that compared with the Control group,Zip14 mRNA and protein expression in LVH rat hearts were markedly increased(P<0.01).Zinc content in rat heart tissue was significantly increased in the LVH group compared with the Control group(P<0.05).ATF4,ATF6,xBP1 mRNA expressions were increased in LVH rat hearts compared with Control hearts(P<0.001).Compared with the Control group,CHOP and BiP mRNA and protein expression were markedly increased in LVH rat hearts(P<0.05,P<0.01).Linear regression models showed that Zip14 mRNA expressions were positively correlated with zinc concentration,ATF4 and ATF6 mRNA expressions in Control hearts(P=0.0005,P=0.0052,P=0.0026,respectively)and LVH rat hearts(P<0.0001,P=0.0119,P=0.0033,respectively).In conclusion,upregulation of Zip14 in LVH rat hearts correlated with zinc accumulation and induction of ERS.

关键词： Zinc Zip14 Endoplasmic reticulum stress(ERS) Left ventricular hypertrophy(LVH) Rat hearts

Palliative Therapy for Gastric Outlet Obstruction Caused by Unresectable Gastric Cancer： A Meta-analysis Comparison of Gastrojejunostomy with Endoscopic Stenting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2016年第9期129卷 1113-1121页

作者： Shi-bo bian Wei-Song Shen Hong-Qing Xi bo Wei Lin Chen Department of General Surgery Chinese People's Liberation Army General Hospital Beijing 100853 China

Background： Gastrojejunostomy （G J J） and endoscopic stenting （ES） are palliative treatments for gastric outlet obstruction （GO0） caused by gastric cancer. We compared the outcomes of GJJ with ES by performing a meta-analysis. Methods： Clinical trials that compared GJJ with ES for the treatment of GOO in gastric cancer were included in the meta-analysis. Procedure time, time to resumption of oral intake, duration of hospital stay, patency duration, and overall survival days were compared using weighted mean differences （WMDs）. Technical success, clinical success, procedure-related mortality, complications, the rate of re-obstruction, postoperative chemotherapy, and reintervention were compared using odds ratios （ORs）.Results： Nine studies were included in the analysis. Technical success and clinical success were not significantly different between the ES and GJJ groups. The ES group had a shorter procedure time （WMD = -80.89 min, 95% confidence interval [CI] = -93.99 to -67.78, P 〈 0.001）, faster resumption of oral intake （WMD = -3.45 days, 95% CI = -5.25 to -1.65, P 〈 0.001）, and shorter duration of hospital stay （WMD = -7.67 days, 95% CI = -11.02 to -4.33, P 〈 0.001）. The rate of minor complications was significantly higher in the GJJ group （OR = 0.13, 95% CI = 0.04-0.40, P 〈 0.001）. However, the rates of major complications （OR = 6.91, 95% CI = 3.90-12.25, P 〈 0.001）, re-obstruction （OR = 7.75, 95% CI = 4.06-14.78, P 〈 0.001）, and reintervention （OR = 6.27, 95% CI = 3.36-11.68, P 〈 0.001） were significantly lower in the GJJ group than that in the E S group. Moreover, GJJ was significantly associated with a longer patency duration （WMD = -167.16 days, 95% CI = -254.01 to -89.31, P 〈 0.001） and overall survival （WMD = -103.20 days, 95% CI = -161.49 to -44.91, P = 0.001）. Conclusions： both GJJ and ES are effective procedures for the treatment of GOO caused by gastric cancer. ES is associated with better short-term outcomes. GJJ is preferable to ES in terms of its lo

关键词： Endoscopic Stenting Gastric Cancer Gastric Outlet Obstruction Gastrojejunostomy

在线全文

学校读者我要写书评

暂无评论

前期晴天时间对城市降雨径流污染水质的影响

环境科学 2009年第12期30卷 3522-3526页

作者：边博江苏省环境科学研究院南京210036

识别影响城市降雨径流污染的主要因子是城市降雨径流污染治理和管理的前提和基础.为此,从2006年5月开始,选择镇江具有代表性的土地使用类型监测城市地表径流水质,分析前期晴天时间对城市地表降雨径污染物的影响.结果表明,随着前期晴天... 详细信息

识别影响城市降雨径流污染的主要因子是城市降雨径流污染治理和管理的前提和基础.为此,从2006年5月开始,选择镇江具有代表性的土地使用类型监测城市地表径流水质,分析前期晴天时间对城市地表降雨径污染物的影响.结果表明,随着前期晴天时间的增加,径流中粒径<40μm的颗粒物粒径体积分数增加;径流中主要水质参数(TN、TP、Zn、Pb、Cu、TSS和COD)与前期晴天时间呈显著正相关,初期地表径流中溶解态污染物增加,说明前期晴天时间是影响城市径流污染浓度和形态的主要因子,从而为城市降雨径流污染的控制和治理提供科学依据.

关键词：城市降雨径流前期晴天时间显著正相关主要因子

太湖西岸河网沉积物中重金属污染特征及风险评价

在线全文

学校读者我要写书评

暂无评论

环境科学 2017年第4期38卷 1442-1450页

作者：边博周燕张琴江苏省环境科学研究院南京210036 江苏省环境工程重点实验室南京210036 河海大学环境学院南京210098

为研究太湖西岸河网沉积物中重金属污染特征及风险,调查了丰-平-枯3个水期19个点位8种重金属的含量,结果表明,沉积物中重金属浓度顺序为Zn>Cr>Cu>Pb>Ni>As>Cd>Hg,其中Cd、Cu、Zn、Pb、Ni明显高于其环境背景值,除As外,其余7种重金属平水... 详细信息

为研究太湖西岸河网沉积物中重金属污染特征及风险,调查了丰-平-枯3个水期19个点位8种重金属的含量,结果表明,沉积物中重金属浓度顺序为Zn>Cr>Cu>Pb>Ni>As>Cd>Hg,其中Cd、Cu、Zn、Pb、Ni明显高于其环境背景值,除As外,其余7种重金属平水期含量高于丰水和枯水期.地累积指数(I_(geo))和潜在生态指数(RI)评价表明,研究区沉积物中Cd属于中等污染程度和中等生态风险,Cd对RI贡献率为35%,重金属生物毒性不利影响评价值(mP EC-Q)范围为0.12~0.76,平均值0.30,表明研究区发生生物毒性不利影响的可能性为15%~29%,工业与生活混合区点位S2从污染程度、生态风险、生物毒性不利影响和主成分评价的污染及风险均最大,表现出多种重金属的协同污染,这与其周围污染排放特征一致,为该区域河流沉积物中重金属污染控制提供依据.

关键词：河流沉积物重金属不同水期污染特征风险评价

在线全文

学校读者我要写书评

暂无评论

巴贡水电站引水隧洞开挖施工质量控制

水利水电技术 2010年第8期41卷 35-37页

作者：边波中国水利水电第七工程局有限公司四川成都611730

巴贡水电站位于马来西亚东部沙捞越州Belaga镇上游37 km处的Balui河上.属于热带雨林海洋性气候,气候炎热,全年温度介于21~32℃之间,雨量充足,潮湿.电站由高205 m总填筑量约1 700万m~3的面板堆石坝、溢洪道、进水口、引水隧洞及厂房组成... 详细信息

巴贡水电站位于马来西亚东部沙捞越州Belaga镇上游37 km处的Balui河上.属于热带雨林海洋性气候,气候炎热,全年温度介于21~32℃之间,雨量充足,潮湿.电站由高205 m总填筑量约1 700万m~3的面板堆石坝、溢洪道、进水口、引水隧洞及厂房组成,总装机容量为8×300 MW.其中引水隧洞位于大坝左岸山体内,由8条隧洞组成,采用单洞单机的方式向发电厂房供水.隧洞开挖断面为圆形,由进口渐变段、上平段、上弯段、竖井段、下弯段、下平段、渐变段和钢衬段组成,全长4 471.3 m.隧洞进口高程为180 m,出口高程为42.0 m,隧洞埋深为 50~235 m,隧洞开挖直径为10.7~8.4 m

关键词：巴贡水电站引水隧洞开挖施工质量控制

在线全文

学校读者我要写书评

暂无评论

镇江城市降雨径流营养盐污染特征研究

环境科学 2008年第1期29卷 19-25页

作者：边博朱伟黄峰卞勋文河海大学环境科学与工程学院南京210098

城市降雨径流污染是城市水体水质恶化的主要原因之一，为了分析降雨径流的污染特征，从2006-05开始，选择镇江具有代表性的土地使用功能对其降雨径流水质进行监测，分析了径流中固体悬浮物和营养盐的变化特征.结果表明，镇江不同功能区... 详细信息

城市降雨径流污染是城市水体水质恶化的主要原因之一，为了分析降雨径流的污染特征，从2006-05开始，选择镇江具有代表性的土地使用功能对其降雨径流水质进行监测，分析了径流中固体悬浮物和营养盐的变化特征.结果表明，镇江不同功能区中5-40μm粒径的固体悬浮物体积分数最大；商业区径流污染物浓度很高，其中SS浓度高达978 mg/L，是城市面源污染的主要来源；降雨初期的30 min径流污染物浓度很高，随降雨历时的延长污染物浓度逐渐下降并趋于稳定；溶解态氮、颗粒态磷和固体悬浮物是径流中污染物输出的主要形态；通过分析固体悬浮物与其他污染物的相关性，发现固体悬浮物是径流中营养盐吸附的载体，去除固体悬浮物是治理镇江降雨径流污染的有效途径.

关键词：城市降雨径流土地使用悬浮物营养盐粒径分布