搜索结果: 1-15 共查到“理学 Sr/Ca”相关记录16条 . 查询时间(0.143 秒)
Migration history of an ariid Indian catfish reconstructed by otolith Sr/Ca and d18O micro-analysis
otolith oxygen isotope carbon isotope Sr/Ca Ba/Ca
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2017/4/10
Understanding catfish ecology is important because catfish constitute one of the largest fish stocks in the coastal IndoPacific
regions. Recent technological advances have enabled the use of biologic...
Precise determination of Sr/Ca by laser ablation ICP-MS compared to ICP-AES and application to multi-century temperate corals
coral Sr/Ca laser ablation ICP-MS ICP-AES
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2017/4/11
Coral skeletal Sr/Ca compositions are valuable tools for the reconstruction of past tropical climate. While solutionbased
ICP-AES has become the preferred method to obtain monthly-resolved Sr/Ca reco...
Coral growth-rate insensitive Sr/Ca as a robust temperature recorder at the extreme latitudinal limits of Porites
skeletal oxygen isotope in the coral Sr/Ca high latitudes coral growth rates
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2017/4/11
Oxygen isotope values of low-growth coral (<5 mm/yr) skeletons may reflect kinetic effects, which is problematic for
sea surface temperature (SST) reconstruction. Here, we report a Sr/Ca-based SST re...
Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (Arctica islandica) —Comparison of ICP-OES and LA-ICP-MS data
trace elements bivalve shell organics LA-ICP-MS ICP-OES sclerochronology
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2017/8/9
The element chemistry of biogenic carbonates can provide important data on past environments. However, the Sr/Ca and Mg/Ca ratios as well as the Mg and Sr concentrations of biological carbonates, espe...
Impact of seawater pCO2 on calcification and Mg/Ca and Sr/Ca ratios in benthic foraminifera calcite: results from culturing experiments with Ammonia tepida
seawater pCO2 calcification and Mg/Ca and Sr/Ca ratios benthic foraminifera calcite culturing experiments Ammonia tepida
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2010/1/21
Evidence of increasing concentrations of dissolved carbon dioxide, especially in the surface ocean and its associated impacts on calcifying organisms, is accumulating. Among these organisms, benthic a...
Bi-Sr-Ca-Cu-O超导体与氧化物衬底材料的反应性估计
Bi-Sr-Ca-Cu-O超导体 固态酸碱反应 X射线光电子能谱
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2009/12/10
测定了一系列氧化物的电子结合能，显示了铋系超导体与二元氧化物衬底材料的化学反应性可以用固态酸碱反应理论来描述，其反应性大小除了可以用衬底氧化物的酸碱参数估计以外，还可以用衬底氧化物氧离子的内层电子结合能估计．
添加Cu2S对Bi-Pb-Sr-Ca-Cu-O体系超导性的影响
超导性 Cu2S添加的Bi-Pb-Sr-Ca-Cu-O体系 R-T XRD XPS
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2009/12/10
本文对Cu_2S添加的Bi-Pb-Sr-Ca-Cu-O体系进行了低温电阻、X射线衍射和XPS研究．实验结果表明，加入少量的Cu_2S能够降低高T_c相的形成温度，改善超导性能，加入Cu_2S引起了Cu 2p_(3/2)谱的主峰向低结合能方向移动，并减少其卫星峰的面积．这表明Cu_2S的加入减少了Cu~(2+)的量，即导致空穴载流子浓度的减小．
Measurement of Sr/Ca Ratio in Bones as a Temperature Indicator
Sr/Ca ratio Internal body temperature Teeth and bones
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2010/10/13
The purpose of this work is to correlate Sr/Ca ratio with internal body temperature from teeth and bones.Results obtained in exploratory measurements using human, bovine and swine teeth indicated some...
采用高温固相法合成Sr4-xCaxSi3O8Cl4:Eu2+荧光材料，利用Van Uitert公式讨论Sr4-xCaxSi3O8Cl4:Eu2+中yEu2+的晶格环境和发光特性，确定晶体中有蓝色和黄绿色两种发光中心，并讨论了它们与光谱结构的对应关系。当0＜x＜0.5，Ca2+固溶入Sr4Si3O8Cl4基质晶格，Eu2+占据八配位Sr2+格位，晶体主要产生蓝色中心的蓝绿色发射;当0.5＜x＜2，较...
Preparation and Anisotropic Elastic Property of Bi-Sr-Ca-Cu-O Whiskers
Anisotropic Elastic Property Bi-Sr-Ca-Cu-O Whiskers
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2010/4/13
Flexible and superconducting Bi-Sr-Ca-Cu-O whiskers have been prepared by sintering the melt-quenched glassy powder at 830oC in oxygen atmosphere. X-ray diffraction and a.c. susceptibility measurement...
Compositional Dependence of Properties of rf-Sputtered Bi-Sr-Ca-Cu-O thin Films
rf-Sputtered Bi-Sr-Ca-Cu-O transition temperature
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2010/4/19
Compositional dependence of superconducting transition temperature (Tc) of Bi2Sr3-xCaxCu2O8+x thin films grown by rf sputtering on single crystal MgO substrates has been investigated. Films have been ...
Effect of Deposition Conditions on Composition of rf-sputtered Bi-Sr-Ca-Cu-O Thin Films
rf-sputtered Bi-Sr-Ca-Cu-O on-axis configuration
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2010/4/19
The effect of rf-magnetron sputtering conditions on as-deposited film composition using a stoichiometric Bi2Sr2CaCu2Oy (Bi-2212) target was investigated in an on-axis configuration, as the stoichiomet...
Lattice simulation studies of the ferroelastic phase transitions in (Na,K)AlSi3O8 and (Sr,Ca)Al2Si2O8 feldspar solid solutions
Lattice simulation studies ferroelastic phase transitions (Na,K)AlSi3O8 (Sr,Ca)Al2Si2O8 feldspar solid solutions
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2012/4/1
Lattice-energy minimization calculations have been performed on the feldspar systems
(Ca,Sr)AI2Si20g and disordered (Na,K)AlSi30g as functions of composition to simulate the
ferroelastic phase trans...
A Study on the Effect of Ni Dopping on Bi-Pb-Sr-Ca-Cu-O System
Ni Dopping Bi-Pb-Sr-Ca-Cu-O System
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2010/4/19
The effect of Ni doping on superconductivity properties of the Bi1.7Pb0.3Sr2Ca2(Cu1-xNix)3Oy system has been investigated by means of x-ray diffraction, ac electrical resistance, ac magnetic susceptib...
高价离子掺入Bi(Pb)-Sr-Ca-Cu-O体系对成相和结构的影响
结构 成相 Bi(Pb)-Sr-Ca-Cu-O 高价离子
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2010/2/21
高价离子掺入Bi(Pb)-Sr-Ca-Cu-O体系对成相和结构的影响。