搜索结果: 1-15 共查到“Sr/Ca”相关记录23条 . 查询时间(0.053 秒)
砗磲壳体因其清晰的天生长纹层、年生长纹层，成为了海洋高分辨率（小时-天-月）古气候重建中的重要研究载体。砗磲环境地球化学指标研究始于上世纪80年代，其δ18O受海水温度与海水δ18Ow的共同影响，已被用于海平面研究、ENSO活动重建等。但鉴于砗磲δ18O受双因素影响，用作独立温度计指标重建海洋温度时会存在误差，因此寻找独立的温度代用指标非常必要。
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．
(Bi,Pb)–Sr–Ca–Cu–O glass-ceramics – superconductor and granular metal
bi-based cuprates mobility edges hopping transport
2011/5/5
In the (Bi,Pb)–Sr–Ca–Cu–O system, materials of various electrical and superconducting properties may be produced by a glass-ceramic method. As a result of heat treatment, amorphous material partially ...
Mg-6Al-(Sr, Ca)合金的显微组织和蠕变性能
Mg-Al-(Sr Ca)合金 压铸 水冷模铸造
2007/12/20
文章摘要：
陶卫健, 刘海峰//金属学报.—2006；42(12).12671273
系统研究了Mg-6Al-2Sr和Mg-6Al-(1-2)Sr-1Ca合金在水冷模铸造和压铸态下的显微组织、力学及蠕变性能. Mg-6Al-2Sr合金的铸态组织由-Mg和沿枝晶界分布呈片状的-Mg+Al4Sr共晶相组成. 在Mg-6Al-2Sr...
洞穴次生化学沉积物中Mg、Sr、Ca及其比值的环境指代意义
2007/7/28
期刊信息
篇名
洞穴次生化学沉积物中Mg、Sr、Ca及其比值的环境指代意义
语种
中文
撰写或编译
作者
李彬等
第一作者单位
刊物名称
中国岩溶
页面
2000.Vol.19.No.2.p115-122
出版日期
2000年
月
日
文章标识(ISSN)
相关项目
我国典型岩溶动力系统与环境的相互作用与演变
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 ...