同位素

In this study, Sr and Nd isotopic compositions of fluorites coexisting with cassiterite and sulfides from the ore veins were analyzed.

本次研究测试了该矿床中与锡石硫化物共生的萤石的Sr和Nd同位素组成。

In order to provide a new way to enhance the level of diagnosis and treat for chronic hepatic disease, we compared infrared isotope spectrometry 13C-metha- cetin breath test (IRIS 13C-MBT) with the most sensitive method so far so as to find a better one in our study.

本研究对红外线同位素能谱分析仪（infrared isotope spectrometry， IRIS）13C-美沙西汀呼气试验（13C-methacetin breath test， 13C-MBT）与目前最为灵敏的肝功能检测进行对照研究，旨在寻找灵敏肝功能检测方法，为提高慢性肝病的诊疗水平提供新手段。

Basing on detailed field survey and laboratory researches on lithological features, mineralogical composition, geochemical and zircon SHRIMP U-Pb data, together with the mineralogical study of chromitite and mantle peridotite heavy mineral bulk sample, various proceedings and recognitions have been achieved:(1) The mantle peridotite is the remnants of partial melted MOR mantle altered by SSZ fluids.

通过详细的野外调查和室内岩石薄片的岩相学、矿物成分、岩石地球化学和锆石SHRIMP U-Pb同位素年代学，铬铁矿和地幔橄榄岩的人工重砂大样的矿物学研究，取得以下进展和认识：(1)认为康金拉地幔橄榄岩为部分熔融MOR地幔残余，叠加了SSZ流体的改造。

Methods SMMC-7721 cell apoptosis was induced by HCPT and the mitochondria were isolated with a mitochondria isolation kit. Mitochondrial proteins labeled with a cleavable isotope-coded affinity tag were identified and quantified using two-dimensional liquid chromatography/tandem mass spectrometry.

用羟基喜树碱诱导肝癌细胞SMMC-7721凋亡，提取线粒体并鉴定其纯度；用可裂解的同位素标记的亲和标签技术标记线粒体蛋白质，利用二维液相色谱-串联质谱分析鉴定蛋白质。

Proteins associated with the membrane and the cytosolic portions of the proteome under different copper ion concentrations were differentially labeled with an acid cleavable isotope-coded affinity tag reagent, and the labeled peptides were separated by two-dimensional chromatography and characterized by electrospray ionization-tandem mass spectrometry.

我们分别将在不同铜离子浓度下的细胞质以及细胞内膜中所有蛋白质标识上酸裂性同位素亲和性标识(acid cleavable isotope-coded affinity tag， cICAT)试剂，用二次元管柱层析将所有标识并酵素水解过的片段分离，并且用电洒式串连质谱(electrospray ionization-tandem mass spectrometry， ESI-MS/MS)以及基因体定序资料库决定蛋白质序列。

Field investigation and analyses of the grain size, geochemical, stable carbon isotope etc climate proxies all indicate that this region, in about 14000aBP, u nderwent the expansion of the swamp. Subsequently, the swamp, because of aridity , began to decrease in area, and even disappeared. This process was followed by an immediate flooding period. The region, after the Younger Dryas cooling event (108000～10200aBP), came into the warming period of the Holocene, and then clima te in the region fluctuated subsequently.

张强通过区域地貌调查及对南京浦镇林峰桥剖面沉积物进行粒度、地球化学和稳定碳同位素等环境替代指标的分析研究，结果表明：本区在14000aBP左右先后经历了沼泽扩张期，此后气候变干，沼泽开始退缩，直至消失，在经过了长时间的沉积间断后又经历一次洪水泛滥期。

To explore the climatic implication of compound-specific hydrogen isotope ratios of sedimentary n-alkanes, the author sampled shallow sediment cores respectively from the climatically and environmentally distinct basins Qiangyong Glacier Lake,Kongmu Co Lake,Nam Co Lake, Keluke Lake and Xiao Qaidam Lake along a S-N transect on the Tibetan Plateau for the extraction and analysis of these biomarkers.

本文分别在青藏高原南部的大枪勇错、空姆错，中部的纳木错以及东北部的克鲁克湖和小柴达木湖钻取了浅岩芯，通过对沉积物中正构烷烃的提取分析和单体氢同位素比值的测定来探讨该类生物标志物单体δD值的气候指示意义。

The methods of hydrocarbon generation and carbon isotopic kinetics are studied in Sulige Gas Field, Yulin Gas Field and Shenmu Gas Field, which indicate that the gas is mainly from Carboniferous-Permian coaly stratum in the south or southwest of the three gas fields; the hydrocarbon generation of source rock is firstly originated from 150Ma or so in Dingbian and its south area, and is successive from south to north and from west to east; the migration directions of natural gas are regionally from southwest to northeast, and partially from bottom to top.

采用生烃动力学和碳同位素动力学的方法，通过对苏里格气田、榆林气田和神木气田的剖析，认为这3个气田的气源主要来自其南部或西南部的石炭-二叠系的煤系地层；烃源岩生烃始于150Ma左右，出现在定边及以南的气源岩区，并存在由南向北、由西向东推进的趋势；天然气区域运移方向是由西南向东北，局部运移方向是由下向上。

Vitrinite and desmocollinite have a relatively low potential of hydrocarbon generation. The stable carbon isotope composition of their pyrolysis oils is heavier than that of sporinite, cutinite and oils derived from coal-bearing strata. It seems that they cannot be major macerals to generate oil, even if they occupy a majority of proportion in the organic matter of coal and coaly shale, and that they can be good gas-prone macerals at the stage of high-maturity to over-maturity.

镜质体和基质镜质体的生油潜力相对较低，其生成的液态烃类的碳同位素组成比一般煤系原油重得多，而且这些组分本身对液态烃具有较强的吸附力，尽管其在煤系有机质中所占的比例很大，仍然难以成为生成液态石油的主要显微组分，只能在高成熟演化阶段成为良好的生气显微组分。

These dikes are temporally and spatially associated with the gold deposit,and they have the same Pb isotopic compositions,which suggest the comagmatic activities in the same tectonic background.

区内脉岩与金矿在时空上密切伴生，Pb同位素组成接近，应属于同一构造同源岩浆活动的产物。结合前人C-H-O-流体包裹体研究成果，表明胶东金矿化中有幔源流体参与的成分。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷