检索结果-内蒙古大学图书馆

Interdiffusion behavior of Pt-modified γ-Ni+γ′-Ni₃Al alloys coupled to Ni-Al-based alloys

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 2005年第7期36A卷 1769-1775页

作者： Hayashi, S Wang, W Sordelet, DJ Gleeson, B the Research Group of Interface Control Engineering Graduate School of Engineering Hokkaido University 060-8628 Sapporo Japan the State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences 110016 Shenyang P.R. China Present address: the Department of Materials Science and Engineering Iowa State University 50011 Arnes IA

The effect of platinum addition on the interdiffusion behavior of gamma-Ni + gamma'-Ni3Al alloys was studied by using diffusion couples comprised of a Ni-Al-Pt alloy mated to a Ni-Al, Ni-Al-Cr, or Ni-based commercial alloy. The commercial alloys studied were CMSX-4 and CMSX-10. Diffusion annealing was at 1150 degrees C for up to 100 hours. An Al-enriched gamma'-layer often formed in the interdiffusion zone of a given couple during diffusion annealing due to the uphill diffusion of Al. This uphill diffusion was ascribed to Pt addition decreasing the chemical activity of aluminum in the gamma + gamma', alloys. For a given diffusion couple end member, the thickening kinetics of the gamma' layer that formed increased with increasing Pt content in the Ni-Al-Pt gamma + gamma' alloy. The gamma'-layer thickening kinetics in diffusion couples with Cr showed less of a dependence on Pt concentration. Inference of a negative effect of Pt and positive effect of Cr on the Al diffusion in this system enabled explanation of the observed interdiffusion behaviors. There was no or minimal formation of detrimental topologically close-packed (TCP) phases in the interdiffusion zone of the couples with CMSX-4 or CMSX- 10. An overlay Pt-modified gamma + gamma' coating on CMSX-4 showed excellent oxidation resistance when exposed to air for 1000 hours at 1150 degrees C. Moreover, the Al content in the coating was maintained at a relatively high level due to Al replenishment from the CMSX-4 substrate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

SORPTION OF PHENOL AND P-NITROPHENOL ONTO A WEAKLY ANION EXCHANGER: XPS ANALYSIS AND MECHANISM

引用

Chinese Journal of Reactive Polymers 2005年第1期14卷 44-51页

作者： LI Xiaotao Pan Bingcai Pan Bingjun Zhang Weimin Meng Fanwei Chen Jinlong Zhang Quanxing State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210093 China Department of Science and Technology State Environmental Protection Agency Beijing 100035 China

X-ray photoelectron spectroscopy(XPS)was adopted to elucidate sorption mechanism of phenol and p-nitrophenol onto a weakly anion exchanger *** distribution of specific forms of tertiary amino group on D301 was obtained and effect of free tertiary amino group on phenol sorption onto D301 was discussed. The result indicated that the percent of the protonated tertiary amine group on polymeric matrix was much lower than the reference compound N,N-dimethylbenzylamine at an identical pH value in solution due to the much lower activity degree of hydrogen ion in inner resin phase than in the external solution. Less free amino group on D301 results in less sorption capacity of phenol and p-nitrophenol in an acidic solution. Under the experimental conditions both phenol sorption onto D301 can be explained as solid extraction and the distribution coefficient varies linearly with the content of free amino group on D301.

关键词： XPS, Anion exchanger Phenolic compounds Sorption mechanism.

来源：评论

学校读者我要写书评

暂无评论

THE state-OF-ART OF Ti NANO-SIZED POWDER POLYMER COATING FOR CORROSION AND SCALING PREVENTION IN CORROSIVE MEDIA

THE STATE-OF-ART OF Ti NANO-SIZED POWDER POLYMER COATING FOR...

引用

首届国际(西安)涂料、涂装、表面工程高层论坛

作者： Yuanlong Du Fujin Xue Junfeng Xue State Key Laboratory for Corrosion and Protection Nat'l Engg．Res．Centre for Corrosion control of Metals (110016 Shenyang China)

The coating is prepared by Ti powder(diameter between 10 and 50 nm as additives of the coating)and epoxy *** the properties of corrosion/scaling of Ti nano-sized powder polymer coating are studied by XPS，infra-red spectrum，X-ray diffraction，transmitting electron microscope and electrochemical impedance spectroscope(EIS)，etc． Based on the study of the properties of the coating and some field tests of the coating On various industrial *** characteristics of the coating on prevention of corrosion and scaling are discussed in the paper．

关键词：腐蚀介质纳米粉体聚合物涂层结垢防治涂料添加剂

来源：评论

学校读者我要写书评

暂无评论

Interdiffusion behavior of Pt-modified γ-Ni + γ'-Ni 3Al alloys coupled to Ni-Al-based alloys

Interdiffusion behavior of Pt-modified γ-Ni + γ'-Ni 3Al al...

引用

作者： Hayashi, Shigenari Wang, Wen Sordelet, Daniel J. Gleeson, Brian Department of Materials Science and Engineering Iowa State University Research Group of Interface Control Engineering Graduate School of Engineering Hokkaido University Sapporo 060-8628 Japan Department of Materials Science and Engineering Iowa State University State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Materials Science and Engineering Iowa State University Ames IA 50011

The effect of platinum addition on the interdiffusion behavior of γ-Ni + γ'-Ni3Al alloys was studied by using diffusion couples comprised of a Ni-Al-Pt alloy mated to a Ni-Al, Ni-Al-Cr, or Ni-based commercial alloy. The commercial alloys studied were CMSX-4 and CMSX-10. Diffusion annealing was at 1150°C for up to 100 hours. An Al-enriched γ'-layer often formed in the interdiffusion zone of a given couple during diffusion annealing due to the uphill diffusion of Al. This uphill diffusion was ascribed to Pt addition decreasing the chemical activity of aluminum in the γ + γ' alloys. For a given diffusion couple end member, the thickening kinetics of the γ' layer that formed increased with increasing Pt content in the Ni-Al-Pt γ + γ' alloy. The γ'-layer thickening kinetics in diffusion couples with Cr showed less of a dependence on Pt concentration. Inference of a negative effect of Pt and positive effect of Cr on the Al diffusion in this system enabled explanation of the observed interdiffusion behaviors. There was no or minimal formation of detrimental topologically close-packed (TCP) phases in the interdiffusion zone of the couples with CMSX-4 or CMSX-10. An overlay Pt-modified γ + γ' coating on CMSX-4 showed excellent oxidation resistance when exposed to air for 1000 hours at 1150°C. Moreover, the Al content in the coating was maintained at a relatively high level due to Al replenishment from the CMSX-4 substrate.

关键词： Nickel alloys

来源：评论

学校读者我要写书评

暂无评论

EFFECTS OF FINE AND ULTRAFINE PARTICLES ON CHILDREN’S RESPIRATORY FUNCTION

EFFECTS OF FINE AND ULTRAFINE PARTICLES ON CHILDREN’S RESPI...

引用

第九届国际气象学和大气科学协会科学大会

作者： Jicheng Gong Tong Zhu Junfeng Zhang Min Hu Yi Li Tong Wang State Key Joint Laboratory for Environmental Simulation & Pollution Control Environmental CollegePeking UniversityCHINA Environmental College/Peking University Institute of Labor Protection

来源：评论

学校读者我要写书评

暂无评论

Study on Environmental Impact of Uranium Mill Tailings on Groundwater

引用

Journal of Nuclear Science and Technology 2004年第SUPP 4期41卷 462-465页

作者： Gu Zhijie[a][*] Guo. Yongheng[a] Wang Zhiming[a] L. Helian[a] Chen Jiajun[b] [a] China Institute for Radiation Protection[b] State Key Laboratory of Environmental Simulation and Pollution Control Beijing Normal University

As more and more uranium mining and metallurgy facilities are facing decommissioning, studies on environmental impacts of uranium mill tailings are given much attention. It has become an important part of environmental impact assessment of decommissioning uranium mining and metallurgy facilities. On the basis of many researches at home and abroad, this paper generalizes previous studies, presents the deficiencies existing and the research direction in the future.

关键词： uranium mill tailings groundwater environmental impact

来源：评论

学校读者我要写书评

暂无评论

Estimation of the radionuclide distribution in sediment in coast area

引用

Journal of Environmental Sciences 2001年第4期13卷 398-400页

作者： SHEN Zhen-yao YANG Zhi-feng LI Wei-juan NI Shi-wei YAO Lang-gen CAI Yuan Institute of Environmental Science Beijing Normal UniversityState Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing 100875China China Institute for Radiation Protection Key Laboratory of Nuclear Radiation Environmental SimulationTaiyuan 030006China

The study of the radionuelide distribution in sediment is a very important aspect in environmental impact of the low level radioactive liquid waste (LLW) from coastal nuclear facilities or nuclear power plant. Even now we do not know much about it. In this paper, a simple and useful method is put forward and it is used to estimate the nuclide distribution in sediment. The result showed that the LLW from nuclear facility or nuclear power plant will do a little harm to the sediment nearby. But the harm is not very serious. Much works have to be done before full understanding of the situation.

关键词： radionuclide coast area deposit characteristic sediment

来源：评论

学校读者我要写书评

暂无评论

A no-choice wind tunnel olfactometer system for evaluating the attractiveness of plant volatiles to adult helicoverpa armigera (hÜbner) (lepidoptera:noctuidae)

引用

Insect Science 2000年第3期7卷 257-264页

作者： Chun, X.I.A.O. Zhi-hua, Y.A.N.G. Jia-wei, D.U. Zhong-ning, Z.H.A.N.G. State Key Laboratory of Integrated Management of Pest Insects and Rodents Control Beijing 100080 China Plant Protection Department Hubei Agricultural College Jingzhou 434103 China

Abstract A bioassay system to evaluate adult cotton bollworm (CBW), Helicoverpa armigera, behavioral responses to plant volatiles was described. The system was comprised of a no-choice olfactometer, a wind tunnel, and a wind tunnel room. The olfactometer was designed to provide for the testing and evaluation of volatiles from a variety of natural and synthetic sources. The behavioral responses in this system demonstrated that the volatiles of wilted leaves of Pterocarya stenoptera, Toona sinensis and Populus canadensis, the main materials of which poplar bundles were made, only could attract virgin females but not mated females and males. The volatiles emitted from fresh carrot and celery flowers did not exhibit significant attractiveness to both sexes of CBW. 0.1% phenylacetaldehyde showed significant attraction for virgin females and males. The biological significance of attraction of volatiles from these plants for CBW was discussed. © 2017 Wiley. All rights reserved.

关键词： Helicoverpa armigera Olfactometer Plant volatiles Wind tunnel

来源：评论

学校读者我要写书评

暂无评论

Groundwater Quality and Public Health

引用

Environment and Resources 1000年第1期48卷 395-418页

作者： Xianjun Xie Jianbo Shi Kunfu Pi Yamin Deng Bing Yan Lei Tong Linlin Yao Yiran Dong Junxia Li Liyuan Ma Chunmiao Zheng Guibin Jiang 2State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan China 1State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution School of Environmental Studies China University of Geosciences Wuhan China 3State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China email: gbjiang@*** 4State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen China

Groundwater deterioration due to enrichment with contaminants of either geogenic or anthropogenic origin has adversely affected safe water supply for drinking and irrigation, with pervasive impacts on human health and ecosystem functions. However, the spatiotemporal evolution and public health effects of groundwater quality remain unclarified, posing a grand challenge for the safe and sustainable supply of global groundwater resources. This article provides a state-of-the-art review of the complexity and dynamics of groundwater quality, as well as the impacts of various groundwater substances on human health. In particular, knowledge is growing about the health impacts of key substances ranging from nutritional elements (e.g., Ca2+, Mg2+) to pollutants (e.g., heavy metals/metalloids, persistent organic pollutants, and emerging contaminants) and, further, to pathogenic microorganisms to which the human body can be exposed through multiple patterns of groundwater use. Proliferating concerns at the same time call for enhancing science-based governance directives, economic policies, and management strategies coordinating groundwater quality. We propose that safeguarding groundwater-dependent public health needs concerted efforts in source control, cross-scale rehabilitation, and social hydrology-based groundwater governance.

关键词： groundwater quality geogenic contaminants emerging contaminants key substances human health sustainable groundwater management

来源：评论

学校读者我要写书评

暂无评论

Biology, Ecology, and Management of Flea Beetles in

引用

Entomology 1000年第1期69卷 199-217页

作者： Zhenyu Li Alejandro Carlos Costamagna Franziska Beran Minsheng You 1Institute of Plant Protection Guangdong Academy of Agricultural Sciences Guangzhou China email: lizhenyu@*** 2Department of Entomology University of Manitoba Winnipeg Manitoba Canada email: Ale.Costamagna@umanitoba.ca 3Department of Population Ecology Friedrich-Schiller-Universität Jena Jena Germany email: franziska.beran@uni-jena.de 4State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry University Fuzhou China email: msyou@***

Brassica vegetable and oilseed crops are attacked by several different flea beetle species (Chrysomelidae: Alticini). Over the past decades, most research has focused on two Phyllotreta species, Phyllotreta striolata and Phyllotreta cruciferae, which are major pests of oilseed rape in North America. More recently, and especially after the ban of neonicotinoids in the European Union, the cabbage stem flea beetle, Psylliodes chrysocephala, has become greatly important and is now considered to be the major pest of winter oilseed rape in Europe. The major challenges to flea beetle control are the prediction of population dynamics in the field, differential susceptibility to insecticides, and the lack of resistant plant cultivars and other economically viable alternative management strategies. At the same time, many fundamental aspects of flea beetle biology and ecology, which may be relevant for the development of sustainable control strategies, are not well understood. This review focuses on the interactions between flea beetles and plants and summarizes the literature on current management strategies with an emphasis on the potential for biological control in flea beetle management.

关键词：

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：