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中国科学院地球环境研究所在砗磲超高分辨率Sr/Ca古气候古天气指示意义方面取得进展（图）
气候 同位素 元素
2024/11/14
砗磲，全球最大的双壳贝类，其壳体具有清晰的年生长纹层与天生长纹层，天纹层宽度约5-60μm，是优良的高分辨率古气候古天气研究载体。月分辨率砗磲Sr/Ca、δ18O已被证实是可靠的砗磲古气候代用指标，常被用于重建过去ENSO活动、海表面温度冬夏温差等，但是有关砗磲同位素、元素比值在小时-天分辨率上的探讨仍在起步阶段。
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
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
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
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
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
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...
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．
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
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
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
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
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
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
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...