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变动世界的经营者

N_2-O_2-SO_2气氛中沉积盐引起fe_3Al和feAl的热腐蚀

作者： (美)德鲁克

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腐蚀科学与防护技术 1993年第1期5卷 52-58页

作者：牛焱吴维(山文) f.Gesmundo f.Viani 中国科学院金属腐蚀与防护研究所腐蚀科学开放研究实验室沈阳110015 热拿亚大学工学院化学研究所热拿亚意大利16129

研究表面分別有混合盐Na_2SO_4-NaCl,Na_2SO_4-V_2O_5和纯Na_2SO_4沉积并在模拟燃气气氛中fe_3Al和feAl于600℃的热腐蚀,在所有试验条件下两种合金均发生热腐蚀。随试验时间的延长、纯Na_2SO_4和Na_2SO_4-NaCI引起的腐蚀明显减缓,而Na_2... 详细信息

研究表面分別有混合盐Na_2SO_4-NaCl,Na_2SO_4-V_2O_5和纯Na_2SO_4沉积并在模拟燃气气氛中fe_3Al和feAl于600℃的热腐蚀,在所有试验条件下两种合金均发生热腐蚀。随试验时间的延长、纯Na_2SO_4和Na_2SO_4-NaCI引起的腐蚀明显减缓,而Na_2SO_4-V_2O_5的腐蚀则加剧并长时持续。feAl一般较之fe_3AI耐蚀,只有在Na_2SO_4-NaCl情况下两者腐蚀性能相近。所有合金的腐蚀产物层总是由一高铁的外层和含铝与铁和少量硫的内层组成,后者的成分随所涂盐的组成而变化。在一定程度上腐蚀机制涉及氧化-硫化与氧化物的熔融等。

关键词：热腐蚀 fe3Al feAl 氯化钠氧化钒

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赛马彩票外六篇

赛马彩票外六篇

1962年

作者：（澳）哈代 f.（Hardy f.）朱惠等译

并列题名：The four-legged lottery

ISBN: (纸本)10078·2097

并列题名：The four-legged lottery

关键词：文学大洋州文学

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进化发展心理学:发展中的人类本性(英文)

心理学报 2007年第3期39卷 439-453页

作者： Jason Grotuss David f. Bjorklund Adriana Csinady florida Atlantic University

进化发展心理学研究社会能力与认知能力发展背后的基因与环境机制,以及基因与环境机制在特定社会文化中的表现。进化发展心理学探讨的主要问题与设计到的主要概念包括:(1)自然选择在毕生发展的早期阶段发挥作用;(2)进化发展心理学特别... 详细信息

进化发展心理学研究社会能力与认知能力发展背后的基因与环境机制,以及基因与环境机制在特定社会文化中的表现。进化发展心理学探讨的主要问题与设计到的主要概念包括:(1)自然选择在毕生发展的早期阶段发挥作用;(2)进化发展心理学特别重视适应在婴儿期及儿童期发展中的作用;(3)儿童期的延长有助于儿童学习人类社会的复杂性;(4)发展背景的方法可以用来理解成人外显行为的进化起源;(5)基因与环境因素相互影响约束个体发展;(6)认知能力与行为活动敏感于早期环境,但二者发展也具有可塑性。

关键词：进化发展心理学自然选择可塑性

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重金属氟化玻璃的光学特性研究

Chinese Journal of Chemical Physics 2000年第5期13卷 571-575页

作者： S.f.Shaukat 董亚明华东理工大学物理系上海200237 华东理工大学化学物理教研室上海200237

介绍含有镧、铈、铪、锆等重金属氟化玻璃 (HMf)的光学性质。光激发荧光的测量是在含有不同浓度金属铈 (5%及 8% )的氟化玻璃中进行的。在氟环境中 ,这种玻璃表现出很强的激发特性和发射荧光光谱。在激发光波长为 2 90nm时 ,样品光谱峰... 详细信息

介绍含有镧、铈、铪、锆等重金属氟化玻璃 (HMf)的光学性质。光激发荧光的测量是在含有不同浓度金属铈 (5%及 8% )的氟化玻璃中进行的。在氟环境中 ,这种玻璃表现出很强的激发特性和发射荧光光谱。在激发光波长为 2 90nm时 ,样品光谱峰值较宽并位于 310nm处。相同元素构成的样品都有几乎相同的光谱 ,只有当玻璃中用锆代替铪时 ,其出射光强相当小。折射实验表明 ,含有铪、镧、铈的样品折射率都很低。同时还观察到 ,相同组分的氟化玻璃其折射率完全相同 ,而组分不同就能观察到折射率较大的变化。折射实验数据均采用Sellmeier公式进行了曲线拟合。

关键词：重金属氟化玻璃荧光折射率应用光学性质

Synthesis and Spectroscopy of Silica Nanoparticles as Scatter Centers in Random Gain Porous Media

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光谱学与光谱分析 2015年第2期35卷 334-339页

作者： firas J.Kadhim Baha T.Chiad Nathera A.Ali Jafer f.Odah Department of Physics College of ScienceUniversity of Baghdad Department of Physics College of ScienceUniversity of Al-Muthanna

This work was carried out to synthesis a silica matrix by sol-gel technique,which used as host to Kiton Red laser dye doped with silica nanoparticles,which also prepared by sol-gel technique,to obtain KRSiO2 nanoparticles confined in silica xerogel *** rods at different pH values were successfully *** different values of pH cause different size of obtained nanoparticles,these nanoparticles act as scatter centers in the *** spontaneous emission(ASE),threshold pumping energy(Eth),and mean free path(lt)for photons in the rods have been *** results show that the values of bandwidth at full width half-maximum(fWHM)and the threshold energy are about 8.7nm and 12 mJ respectively.

关键词： Spectroscopy Keton Red Sol-Gel technique Mean free Path

Critical Considerations in the Immunochemical Detection and Quantitation of Antigenic Biomarkers

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Biomedical and Environmental Sciences 1991年第Z1期 113-129页

作者： DEAN W.ROBERTS,R.WAYNEBENSON,JACK A.HINSON,fRED f.KADLUBAR Division of Biochemical Toxicology National Center for Toxicological Research Jefferson Division of Biochemical Toxicology National Center for Toxicological Research Jefferson Division of Interdisciplinary Toxicology University of Arkansas for Medical Sciences. Little Rock Division of Biochemical Toxicology National Center for Toxicological Research Jefferson Arkansas 72079-9502 Arkansas 72079-9502 Arkansas 72205 Arkansas 72079-9502

The formation of covalent adducts as a result of the interaction of metabolically activated chemicals with host macromolecules is a common critical event in mutagenic, carcinogenic, and immunologic phenomena. Because of their antigenicity and their immunogenicity, covalent adducts may be detected using sensitive immunochemical techniques. The immunochemical approaches to biomonitoring and molecular dosimetry of DNA damage are particularly attractive because they allow sensitive quantitation of specific DNA adducts present in small samples and do not rely on the use of radiolabeled adducts. Two examples of biomarker immunoassay development are presented: an avidin/biotin-amplified ELISA for the major DNA adduct of the human bladder carcinogen 4-aminobiphenyl (ABP), and a particle concentration fluorescent immunoassay (PCfIA) for the major protein adduct associated with toxicity by the prototype hepatotoxin acetaminophen. The examples illustrate critical steps in the development of biomarker immunoassays

关键词： Critical Considerations in the Immunochemical Detection and Quantitation of Antigenic Biomarkers ABP

纳米晶Ni-Ag合金在600-700℃的空气氧化

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中国腐蚀与防护学报 2001年第5期21卷 257-264页

作者：赵泽良牛焱 f.Gesmundo 中国科学院金属研究所金属腐蚀与防护国家重点实验室沈阳110016 Dipartimento di Ingegneria Chimicaedi Processo Universita di Genova

利用球磨和热压致密化过程 ,得到富Ag和富Ni相均匀分布的纳米晶Ni-Ag双相合金 .研究了含Ni分别为 50at%和 75at%的Ni- 50Ag和Ni- 2 5Ag合金在 60 0～ 70 0℃空气中的氧化 .Ni- 50Ag合金形成了Ni内氧化结构 ,最外层为连续Ag层 ,其氧化速... 详细信息

利用球磨和热压致密化过程 ,得到富Ag和富Ni相均匀分布的纳米晶Ni-Ag双相合金 .研究了含Ni分别为 50at%和 75at%的Ni- 50Ag和Ni- 2 5Ag合金在 60 0～ 70 0℃空气中的氧化 .Ni- 50Ag合金形成了Ni内氧化结构 ,最外层为连续Ag层 ,其氧化速率大于纯Ni.相反 ,Ni- 2 5Ag合金则形成了连续的NiO外氧化层且最外层为不连续的Ag层 .Ni- 2 5Ag合金氧化初期服从抛物线速率常数关系 ,随后氧化速率显著减小甚至小于纯Ni.合金的双相结构特性以及合金中极小的晶粒尺寸导致了上述结果的产生 .

关键词：机械合金化纳米晶氧化双相合金高温氧化镍合金

Environmental and biological factors affecting the abundance of Prosopis flexuosa saplings in the central-west Monte of Argentina

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forest Ecosystems 2022年第1期9卷 103-110页

作者： Cappa f.M. Campos V.E. Barri f.R. Ramos L. Campos C.M. INTERBIODES(Interacciones Biologicas del Desierto) Facultad Ciencias ExactasFísicas y Naturales(Universidad Nacional de San Juan)San JuanArgentina CIGEOBIO-CONICET(Centro de Investigaciones de la Geosfera y Biosfera Consejo Nacional de Investigaciones Científicas y Tecnicas)San JuanArgentina Instituto de Diversidad y Ecología Animal CONICET–UNCCordobaArgentina IADIZA Instituto Argentino de Investigaciones de las Zonas AridasUniversidad Nacional de CuyoGobierno de MendozaCONICETMendozaArgentina

Background:Trees and forests in drylands help mitigate the challenges through provision of economic products and vital environmental services such as habitat for biodiversity,prevention of erosion and desertification,regulation of water,microclimate,and soil *** condition and changes in dry forests can be assessed by using ecological indicators able to quantify spatial and temporal changes in *** of the ways to determine the condition of the forest is to study the dominant tree species and its *** study aimed to assess whether the abundance of Prosopis flexuosa saplings is affected by environmental and biological ***:To evaluate the first variables we used data from remote sensing such as satellite images and Aster Global Digital Model(GDEM).The second set of variables was about exotic and native ungulates and we used feces of these animals and camera traps to take *** found that sapling abundance related positively to sandy substrates and negatively to Wetness *** the other hand,in relation to biological variables,the abundance of saplings was positively affected by density of adult trees and by number of seeds dispersed by equines,but space use by Lama guanicoe had a negative relationship with *** research shows that *** saplings are benefited from sandy substrates and the conditions around adult *** addition to this,we found that exotic ungulates in low densities have neutral(***)or positive(***)effects on sapling ***:Based on these findings,we conclude that regeneration of the population of *** in our study area has no major *** addition,we corroborated that the presence of exotic and domestic ungulates in low densities does not have deleterious consequences for saplings of the dominant tree,***.

关键词： Bos primigenius taurus Dry forests Equines Exotic and domestic ungulates Lama guanicoe Prosopis flexuosa Remote sensing Saplings Seed dispersal