检索结果-南通市图书馆

Impact of drilling waste pollution on land cover in a high subarctic forest-tundra zone

Pedosphere 2022年第3期32卷 414-425页

作者： Anatoly OPEKUNOV Marina OPEKUNOVA Stepan KUKUSHKIN sergey LISENKOV Institute of Earth Sciences St.Petersburg State UniversitySt.Petersburg 199178(Russia)

Global climate changes can lead to the destruction of the permafrost zone and contribute to the active transfer of pollutants to natural *** can be especially pronounced in the areas of oil and gas production in the *** study aimed to define the landscape components(i.e.,groundwater,soil water,soil,and indicator plant species)of chemical pollution with metals,oil hydrocarbons,and polycyclic aromatic hydrocarbons,from the discharge of drill *** at two sites in the forest-tundra zone of Western Siberia(Russia)were carried out within two years of *** migration was found in peaty-gley heavy loamy soils and iron-illuvial clayey podburs,but lateral migration of different pollutants did not exceed 200 ***,radial migration was practically absent owing to the high buffering capacity of the soil organic horizon and the upward flow of matter in the seasonal melt *** main indicators of drilling waste pollution were high concentrations of Sr,ba,petroleum hydrocarbons,and Cl^(-)*** the waste disposal sites,the concentration of ba and Sr in the soil water were 1150 and 1410μg L^(-1),respectively;in groundwater,they reached 721 and 2360μg L^(-1),*** the soil,ba and Sr accumulated in the peaty horizon(798 and 706 mg kg^(-1),respectively).The concentration of Cl^(-)ions in the soil water at the site of waste discharge was 1912 mg L^(-1),and at a distance of 200 m,it decreased to 77.4 mg L^(-1).The Cl^(-)concentration in the groundwater was lower,and at a distance of 200 m,it was 38.9 mg L^(-1).The highest concentration of petroleum hydrocarbons in the surface layer was found in the peaty-gley soils(up to 2400 mg kg^(-1)).In glandular-illuvial podburs,it was 420 mg kg^(-1).In horizons BH and BC,it was close to the background values(27 and 33 mg kg^(-1),respectively).Alkalinization of soils and water under the influence of drill cuttings led to the death of oligotrophic and acidophilic vegetation at a distanc

关键词： metal petroleum hydrocarbons plant indicator species pollutant migration in soil polycyclic aromatic hydrocarbon

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CaAl_(2)Si_(2)O_(8) polymorphs:Sensitive geothermometers and geospeedometers

引用

Geoscience Frontiers 2023年第1期14卷 33-45页

作者： Liudmila A.Gorelova Oleg S.Vereshchagin Vladimir N.Bocharov sergey V.Krivovichev Andrey A.Zolotarev Mikhail A.Rassomakhin Institute of Earth Sciences Saint Petersburg State UniversitySt.PetersburgRussia Centrefor Geo-Environmental Research and Modelling(Geomodel).Saint Petersburg State University St.PetersburgRussia Kola Science Centre ApatityMurmansk RegionRussia South Urals Federal Research Center of Mineralogy and Geoecology of UB RAS MiassRussia

Plagioclase is the major rock-forming mineral constituting the Earth's crust,whereas anorthite(CaAl_(2)Si_(2)O_(8))is a common minerals in lunar highlands crust,meteorites,possibly in some comets and on *** anorthite,two high-temperature polymorphs of CaAl_(2)Si_(2)O_(8)are known:dmisteinbergite and svyatoslavite,which are found in burnt coal dumps,meteorites and *** we present the results of detailed studies(quenching experiments,elemental analysis,Raman spectroscopy and in situ high temperature single crystal X-ray diffraction(up to 1000℃))on naturally co-occurring CaAl_(2)Si_(2)O_(8)polymorphs(anorthite,dmisteinbergite and svyatoslavite)from a burnt coal dump in Kopeisk,*** polymorphs were found in all natural samples and obtained upon heating of dmisteinbergite(unquenchableβ-dmisteinbergite and quenchable y-dmisteinbergite).It was shown that Ca coordination differs significantly in CaAl_(2)Si_(2)O_(8)polymorphs,resulting in a different capacity to host ba and possibly other large ion lithophile *** our data on natural samples with the previously published data on natural and synthetic compounds,we propose a new scheme of CaAl_(2)Si_(2)O_(8)polymorphs *** results indicate that CaAl_(2)Si_(2)O_(8)polymorphs could be used for temperature estimations for both Earth and planetary sciences.

关键词： Feldspar Polymorphism Anorthite Dmisteinbergite Svyatoslavite CaAl_(2)Si_(2)O_(8)

来源：

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

亚北极太平洋边缘海表层沉积物地球化学特征

引用

海洋科学进展 2019年第4期37卷 601-612页

作者：朱爱美刘季花邹建军 GORbaRENKO sergey 李朝新刘焱光自然资源部第一海洋研究所山东青岛266061 自然资源部海洋沉积与环境地质重点实验室山东青岛266061 青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室山东青岛266061 俄罗斯科学院远东分院太平洋海洋研究所俄罗斯符拉迪沃斯托克690041

对鄂霍次克海和白令海及其毗邻区40个站位表层沉积物样品的粒度和43种地球化学元素分析表明,表层沉积物类型及地球化学组成在空间上分布存在显著差异。因子分析显示,表层沉积物元素地球化学存在陆源、生源(ba,Ca和Sr等)和自生源(Mn,Mo和... 详细信息

对鄂霍次克海和白令海及其毗邻区40个站位表层沉积物样品的粒度和43种地球化学元素分析表明,表层沉积物类型及地球化学组成在空间上分布存在显著差异。因子分析显示,表层沉积物元素地球化学存在陆源、生源(ba,Ca和Sr等)和自生源(Mn,Mo和Cd)三种来源。沉积物粒度与主微量元素分布没有显著的相关性。主微量元素地球化学散点图揭示表层沉积物碎屑物质存在来自火山和上地壳风化产物的贡献。白令海陆坡流和东萨哈林流对于底层沉积物分选有重要的影响。聚类分析显示,在空间分布上,鄂霍次克海以及底特律海山表层沉积物由陆源碎屑和火山物质混合构成;堪察加半岛东侧表层沉积物主要来自堪察加半岛,以火山碎屑贡献为主;白令海西北陆坡和鄂霍次克海西部陆坡表层沉积物主要来自阿纳德尔河和黑龙江(俄罗斯境内为Amur河)的输入,以陆源碎屑为主。研究区表层沉积物地球化学空间分异性与碎屑物质的来源、搬运动力、区域水动力条件密切相关。

关键词：元素地球化学表层沉积物因子分析与聚类分析鄂霍次克海白令海

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modifying light–matter interactions with perovskite nanocrystals inside antiresonant photonic crystal fiber

引用

Photonics Research 2021年第8期9卷 1462-1469页

作者： ANDREY A.MACHNEV ANATOLY P.PUSHKAREV PAVEL TONKAEV ROMAN E.NOSKOV KRISTINA R.RUSIMOVA PETER J.MOSLEY sergey V.MAKAROV PAVEL B.GINZBURG IVAN I.SHISHKIN School of Electrical Engineering Tel Aviv UniversityTel Aviv 69978Israel Department of Physics and Engineering ITMO UniversitySaint Petersburg 197101Russia Centre for Photonics and Photonic Materials Department of PhysicsUniversity of BathBath BA27AYUK Photonics and 2D Materials Moscow Institute of Physics and TechnologyDolgoprudny 141700Russia

Structured environments are employed in a plethora of applications to tailor dynamics of light–matter interaction processes by modifying the structure of electromagnetic *** promising example of such a system is antiresonant photonic crystal fibers(AR-PCFs),which allow light–analyte interactions in a very long *** we probe contribution of microstructuring and nontrivial mode hierarchy on light–matter interactions in AR-PCFs by investigating lifetime shortening of perovskite(CsPbBr3)nanocrystals grown to fiber *** crystals have been deposited using a wet chemistry approach and then excited by a supercontinuum source in the 450–500 nm *** spectra have been measured and analyzed via the time-correlated single photon counting(TCSPC)technique,unravelling contributions of core and cladding *** lifetime imaging inside an AR-PCF enables mapping input of various electromagnetic channels into light–matter interaction *** results pave the way for tailoring the dynamics of high-order quantum processes,promoting the concept of AR-PCF as a light-driven reactor.

关键词： fiber light resonant

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

光动力作用对铜绿假单胞杆菌杀伤效应的研究

引用

激光生物学报 2006年第5期15卷 453-457页

作者：周斯博张智红 Onega V Ulianova sergey S Ulyanov 骆清铭华中科技大学生物医学光子学教育部重点实验室 Saratov State University Moskovskaya 155Saratov 410026Russia

目的:探讨不同的光动力剂量下光动力疗法(photodynam ic therapy,PDT)对体外培养的铜绿假单胞杆菌的杀伤效应。方法:以耐药性较强的铜绿假单胞杆菌(Pseudom onas aeruginos,***)为研究对象,采用亚甲基蓝(m ethylene b lue,MB)作为光敏剂... 详细信息

目的:探讨不同的光动力剂量下光动力疗法(photodynam ic therapy,PDT)对体外培养的铜绿假单胞杆菌的杀伤效应。方法:以耐药性较强的铜绿假单胞杆菌(Pseudom onas aeruginos,***)为研究对象,采用亚甲基蓝(m ethylene b lue,MB)作为光敏剂,用656 nm的激光作为光源(m axoutput=300 mW),对不同系列浓度的MB进行不同剂量的光照,用菌落计数的办法来观测PDT对铜绿假单胞杆菌的杀伤作用;同时利用血培养基检测铜绿假单胞杆菌致病性的改变。结果:在光照剂量相同的情况下,浓度适中(131.7 m ol)的亚甲基蓝溶液能够有效地杀伤铜绿假单胞杆菌,使其致病性降低;而浓度较高(1 317 m ol)或较低(13.17 m ol)的亚甲基蓝溶液对铜绿假单胞杆菌的杀伤作用相对较弱。结论:光动力作用对体外培养的铜绿假单胞杆菌具有明确的杀伤作用,但是其效果和剂量关系密切,所以在治疗过程中必须寻找合适的光敏剂剂量。

关键词：光动力疗法亚甲基蓝铜绿假单胞杆菌

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：