检索结果-南通市图书馆

Relations between mercury fractions and microbial community components in seawater under the presence and absence of probable phosphorus limitation conditions

引用

Journal of Environmental Sciences 2019年第1期31卷 145-162页

作者： Igor ?ivkovi? Vesna Fajon Jo?e Kotnik Yaroslav Shlyapnikov Kristina Obu Vazner Ermira Begu Stefanija ?estanovi? Danijela ?anti? Ana Vrdoljak Slaven Jozi? Mladen ?oli? Jelena Lu?i? Jere Ve?a Grozdan Ku?pili? Marin Ordulj Frano Mati? Branka Grbec Natalia Bojani? ?ivana Nin?evi? Gladan Milena Horvat Department of Environmental Sciences Jo?ef Stefan Institute Jo?ef Stefan International Postgraduate School Ecological Engineering Institute Maribor 2000 Slovenia Laboratory of Marine Microbiology Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Chemical Oceanography and Sedimentology of the Sea Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Chemical Oceanography and Sedimentology of the Sea Institute of Oceanography and Fisheries Department of Marine Studies University of SplitSplit 21000 Croatia Laboratory of Physical Oceanography Institute of Oceanography and FisheriesSplit 21000 Croatia Laboratory of Plankton and Shellfish Toxicity Institute of Oceanography and FisheriesSplit 21000 Croatia

Microbial transformations of toxic monomethylmercury(MMHg) and dissolved gaseous mercury(DGM) at the lower levels of the marine food web are not well understood, especially in oligotrophic and phosphorus-limited seas. To examine the effects of probable phosphorus limitation(~PP-limitation) on relations between mercury(Hg) fractions and microorganisms, we determined the total mercury(THg), total methylated mercury(MeHg), DGM, and microbiological and chemical parameters in the Central Adriatic Sea. Using statistical analysis, we assessed the potential microbial effects on Hg transformations and bioaccumulation. Only in the absence of ~PP-limitation conditions(^(NO–P)P-limitation) is MeHg significantly related to most chemical and microbial parameters, indicating metabolism-dependent Hg transformations.The heterotrophic activity of low nucleic acid bacteria(abundant in oligotrophic regions)seems responsible for most of Hg methylation under ^(NO–P)P-limitation. Under these conditions,DGM is strongly related to microbial fractions and chlorophyll a, indicating biological DGM production, which is probably not metabolically induced, as most of these relations are also observed underPP-limitation. MMHg biomagnification was observed through an increased bioaccumulation factor from microseston to mesozooplankton. Our results indicate that Hgtransformations and uptake might be enhanced under ^(NO–P)P-limitation conditions, emphasizing their impact on the transfer of Hg to higher trophic levels.

关键词： Mercury speciation Methylmercury Probable phosphorus limitation Microbial community

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

The status,limitation and improvement of adoptive cellular immunotherapy in advanced urologic malignancies

引用

Chinese Journal of Cancer Research 2015年第2期27卷 128-137页

作者： Haoqing Shi Xiangjie Qi Bin Ma Yanwei Cao Lina Wang Lijiang Sun Haitao Niu Department of Urology Affiliated Hospital of Qingdao University Department of Urology People's Hospital of Linzi District Medical College of Qingdao University

In recent years, immunotherapy has been gradually established as the fourth frequently adopted antitumor therapy, following surgery, chemotherapy and radiotherapy, for advanced urologic malignancies with an improved understanding of theoretical basis, such as molecular biology and immunology. Thereinto, adoptive cellular immunotherapy （ACI） has become one of the hotspots, which comprises a variety of treatment approaches, such as TIL, CIK cell, ~＇~ T cell, CAR-engineered T cell and Allogeneie stem cell transplantation （alloSCT）. Although preclinical efficacy has been demonstrated remarkably, clinical trials could not consistently show the benefit due to multi-factors in complex immnnosuppressive microenvironment in vivo compared to that of in vitro. Here we review some timely aspects of ACI for advanced urologic malignancies, and describe the current status and limitation of immunotherapy from the cellular level. It＇s our expectation to provide prompting consideration of novel combinatorial ACI strategies and a resurgence of interest in ACI for advanced urologic malignancies.

关键词： Adoptive cellular immunotherapy （ACI） limitation improvement urologic malignancies

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

公共资源特许利益的限制与保护

引用

宪法学、行政法学 2018年第8期 14-34页

作者：肖泽晟

公共资源特许利益的性质随公共资源类型和用途等的不同而不同。例如，燃气特许经营权就是一种从事“公务活动”的资格，是为保障特许经营者能够履行行政法义务而赋予的具有财产价值的权利。这种财产价值体现为特许经营者有权获得合理回... 详细信息

公共资源特许利益的性质随公共资源类型和用途等的不同而不同。例如，燃气特许经营权就是一种从事“公务活动”的资格，是为保障特许经营者能够履行行政法义务而赋予的具有财产价值的权利。这种财产价值体现为特许经营者有权获得合理回报。该权利在受到第三人侵害时，必须首先由行政许可机关提供救济。特许经营者除了提供连续而普遍的服务、不损害公共利益外，还要承担缴纳履约保证金、损害补偿或恢复原状、不擅自转让股权和向第三人提供担保、缴纳特许费、公开经营成本和收入支出信息、忍受不确定的行政管制、接受严密的行政监督和公众监督等义务。另一方面，为保障特许经营者的特许利益，行政机关应依法明确裁量基准，在更新或延续阶段赋予特许经营者相对优先权，建立协议的第三方审查机制，建立促进特许经营者合理盈利、保护其合理期待和免遭第三人侵害的机制，建立因行政管制导致特别损害的补偿机制。

关键词：公共资源特许利益政府监护燃气特许经营权限制 Public Resource Chartered Interests Government Guardianship Gas Franchise limitation

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

论教学模式改革的限度

引用

中小学教育 2018年第12期 26-31页

作者：郑玉飞

在众多学校将教学模式改革作为教学改革主要内容之时，我们需要理性看待教学模式改革所能发挥的真实效用，进而反思教学模式改革应该遵循的限度问题。改革必然存在限度，改革的过程就是破除旧限度建立新限度的过程。教学模式改革可以改... 详细信息

在众多学校将教学模式改革作为教学改革主要内容之时，我们需要理性看待教学模式改革所能发挥的真实效用，进而反思教学模式改革应该遵循的限度问题。改革必然存在限度，改革的过程就是破除旧限度建立新限度的过程。教学模式改革可以改的是教学环节、步骤以及理念和目标等量的方面，不可改的是教学模式的基本要素，不能使教学模式发生质的改变。确定教学模式改革限度的依据是教学模式自身的特性及改革的理想目标。

关键词：教学模式改革限度　　teaching models reforms limitation

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

Testing potassium limitation on soil microbial activity in a sub-tropical forest

引用

Journal of Forestry Research 2019年第6期30卷 2341-2347页

作者： Taiki Mori Senhao Wang Zhuohang Wang Cong Wang Hui Mo Jiangming Mo Xiankai Lu Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems and Guangdong Provincial Key Laboratory of Applied BotanySouth China Botanical GardenChinese Academy of SciencesGuangzhou 510650GuangdongPeople’s Republic of China Graduate School of Agriculture Kyoto UniversityKitashirakawa Oiwake-choSakyo-kuKyotoJapan University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Department of Biological Sciences Stanford UniversityStanfordCA 94305-5020USA Department of Forest Site Environment Forestry and Forest Products Research InstituteTsukubaIbaraki 305-8687Japan

Because potassium(K)is a rock-derived essential element that can be depleted in highly-weathered tropical soils,K availability may limit some portion of soil microbial activity in tropical forest ecosystems.In this paper we tested if K limits microbial activity in the condition of sufficient labile C supply.An incubation experiment was performed using surface soil samples(0–10 cm depth)obtained from four permanent ecological research plots in a natural sub-tropical forest in southern China.Soil samples were taken in September 2016.Heterotrophic soil respiration rates and microbial biomass were measured after the addition of glucose(both D and L)with and without K(potassium chloride).We did not observe any effects of K addition on soil microbial respiration,suggesting that K does not limit the microbial activity in the condition of sufficient labile C supply.The lack of microbial response to added K can be attributed to the high mobility of K in forest ecosystems,which may have provided sufficient K to microbes in our soil samples(already provided at the beginning of the incubation).However,at the present stage,we cannot conclude that K is not a limiting factor of soil microbial activity in other tropical forest ecosystems because of the heterogeneity of tropical forest ecosystems and few observations.The hypothesis needs to be tested in larger numbers of tropical forests.

关键词： Nutrient limitation Rock-derived nutrients Soil biology Nutrient dynamics Potassium addition

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

Practice Study on Operation Evaluation and limitation for Merchant Ships in Polar Water

引用

Hydro Science & Marine Engineering 2019年第1期1卷 9-14页

作者： Shifeng Ding Li Zhou Chenkang Zhong Zhengrong Wang School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Shanghai Rules and Research Institute China Classification SocietyShanghai200135China

All environmental hazards impact the safety of polar ships,especially polar merchant ship with light ice-class.In order to provide a systematic guidance to deal with any situation during polar operation,International Maritime Organization(IMO)raised mandatory requirements of“Polar Water Operation Manual”(PWOM)in Polar Code.This paper focuses on how to determinate operational evaluation and limitation for the PWOM,which is an important measure to avoid polar ships exceeding operational capability.Features of polar navigation are summarized based on the former polar navigation experience,and typical risk model is set up to describe the process of operation evaluation.The operational limitation is analyzed to indicate the actual capability and limitation as the ship encounters unexpected accidents in polar waters.In conclusion,the operation procedure is studied to give a detailed technical proposals for the whole polar operation,which is the main component of PWOM.The outcome may provide help for to arctic shipping of merchant ships.

关键词： Polar Ship Operational Risk Assessment Ice Operation limitation Risk Analysis

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

论现代童年概念的内涵、源起与局限

幼儿教育导读（教育科学）

引用

幼儿教育导读（教育科学） 2016年第4期 30-35页

作者：林兰

现代童年概念最早出现在西方发达工业国家，反映了启蒙运动以来对待儿童及其生活的现代思维方式。现代童年概念强调儿童与成人的区别和对立；建立了童年的线性发展模式；产生了“标准化”的童年样态。现代童年概念源于二分法的现代思维... 详细信息

现代童年概念最早出现在西方发达工业国家，反映了启蒙运动以来对待儿童及其生活的现代思维方式。现代童年概念强调儿童与成人的区别和对立；建立了童年的线性发展模式；产生了“标准化”的童年样态。现代童年概念源于二分法的现代思维逻辑，受生物学导向的童年研究视角限制，并随着制度化学校教育的发展及现代家庭生活的变化得到巩固。现代童年概念以儿童生理发展的不成熟预测了儿童社会能力的不足，将儿童的生活划定在特定的范围内，使得儿童的社会地位被边缘化，定义童年的权力被成人操控，童年的多样形态被忽略，儿童的声音被埋没。

关键词：现代性童年概念二分法源起局限　　modernity the concept of childhood dichotomy origin limitation

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

学校读者我要写书评

暂无评论

为消除贫困而设的版权限制:中国版权法条款是否可以成为发展中国家的模板?（英文）

引用

China Legal Science 2015年第2期3卷 129-147页

作者：万勇 Shanghai JiaoT ong University KoG uan Law School

I.INTRODUCTION On February 10,2012,International Intellectual Property Alliance released the 2012 Special Report on Copyright Protection and Enforcement,which mentioned that article 9 of the Regulations for the Protection of the Right of Communication through the Information Network1(hereinafter referred to as RPRCIN)has certain unclear or overbroad terms,which may be incompatible with the Trips Agreement.

关键词： copyright hereinafter license limitation reproduction provisions exception unclear mentioned poverty

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

The Dosimetric Characteristics and Potential limitation in Clinical Application of a Low Energy Photon Intra-Operative Radiotherapy System

引用

International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2015年第2期4卷 184-195页

作者： Zhenhua Xiao Ouyang Bin Zhenyu Wang Botian Huang Bixiu Wen Department of Radiation Oncology The First Affiliated Hospital of Sun Yat-sen University Guangzhou China

Purpose: To investigate the dosimetric characteristics of a low energy photon intra-operative radiotherapy (IORT) system and explore its potential limitation in clinical application. Methods: A special water phantom, a parallel-plate ionization chamber and an electrometer were used to measure the depth dose rate, isotropy of dose distribution in X/Y plane, dosimetry reproducibility of bare probe and spherical applicators of different size which were used in comparison with the system data. Results: The difference in depth dose rate between the measurement and system data for bare probe is -2.16% ± 1.36%, the range of the relative deviation for isotropy in the X/Y plane is between -1.9% and 2.1%. The difference in depth dose rate, transfer coefficient, isotropy in X/Y plane between the measurement and system data for the whole set of spherical applicators is -10.0% - 2.3%, -8.9% - 4.2% and -1.6% - 2.6%, respectively. Higher surface dose rate and steeper gradient depth dose are observed in smaller spherical applicators. The depth dose rate and isotropy for bare probe and spherical applicators have been shown good reproducibility. The uncertainty of measurement is associated with the positioning accuracy, energy response, noise current and correction function f’(R). Conclusions: Thorough commissioning of the low energy photon IORT system helps us better understand the dosimetry characteristics, verify the system data, obtain adequate data for clinical application and routine quality assurance. The steep gradient depth dose and limited treatment range may restrain its potential in clinical application.

关键词： Intra-Operative Radiotherapy Low Energy Photon Dosimetry Isotropy limitation

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

“导学案教学”与“翻转课堂”的价值、限度与共生

引用

中小学教育 2013年第12期 10-17,94页

作者：张旸蒙泽察

人们对“教育需要”和学习方式的变革为课改创生了空间和可能性。“导学案教学”与“翻转课堂”是在不同的教育背景下创生的高效课堂教学，但二者在倾向性上却存在着价值的统一性。从宏观限度和课堂教学结构自身的主体、内容与过程和影... 详细信息

人们对“教育需要”和学习方式的变革为课改创生了空间和可能性。“导学案教学”与“翻转课堂”是在不同的教育背景下创生的高效课堂教学，但二者在倾向性上却存在着价值的统一性。从宏观限度和课堂教学结构自身的主体、内容与过程和影响三个维度的微观限度对其二者进行反思，从而实现从效仿到整合，“模式化”向“去模式化”的转变，形成互动、共生及再造的联动的课程与教学观理论体系与联结效应实践共生机制。

关键词：导学案教学翻转课堂高效课堂价值统一性限度共生机制 the guidance case teaching the flipped classroom high efficient classroom value unity limitation mutualism mechanism

来源：人大复印报刊资料评论

在线全文

人大复印报刊资料

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

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

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：