质元素

Applying the method to the study on the origin of Tunguska explosion and making the following conclusions:(1) these excess elements were likely resulted from the Tunguska Cosmic Body explosion of 1908.(2) The Tunguska explosive body was composed of materials similar to Cl chondrite, and, most probably, a cometary object, which weighed more than 10〓 tons and had a radius of more than 126m.

将通古斯地区沉积物样品中PGE和其他微量元素的结果应用于通古斯爆炸的成因研究中，得出了如下结论：(1)Pd、Os、REE、Sr、Co和Ni等元素的异常是由于通古斯爆炸事件导致地外物质的增加所引起的；(2)通古斯爆炸物体可能与碳质球粒陨石成分类似，很可能是慧星，其质量大于10〓吨，半经大于126米。

The mineral chemistry, trace elements and Sr-Nd isotopic geochemistry of different types of deep-seated inclusions indicate that Group Ⅰinclusions in western Shaudong could be the relicts of high degree of partial melting of the mantle-derived peridotites and then subjected to mantle metasomatism; the dunite and harzburgite in Group Ⅱ inclusions could be resulted from the metasomatism of silica-rich melts in the upper mantle; the olivine-pyroxenite and pyroxenite in Group Ⅱ and Group Ⅲ inclusions could be magmatic cumulates derived from magma underplating in the upper mantle.

不同结构类型深源岩石包体的矿物化学、元素和同位素地球化学研究表明，鲁西具有变质变形结构特征的橄榄岩类岩石包体为岩石圈地幔橄榄岩部分熔融后的残留体，其后又遭受了地幔交代作用的改造；具有变质变形结构，并叠加有矿物反应结构的纯橄岩和方辉橄榄岩类包体为古老岩石圈地幔被富硅质熔体改造的结果；具有残留岩浆结晶结构的橄榄岩、橄辉岩类岩石包体以及具有变晶结构或堆晶结构的辉石岩类包体为地幔更早期岩浆作用的在上地幔的堆积体。

Taking Au-Ag intergrowth compounds as an example this paper has reached the following conclusions. In the Au-Ag compounds of differem types of gold deposits as sequemially replaces Au, making up a continuous isomorphous series. The content of Au and Ag in native gold forms a regular pattern. The development of native gold and that of electrum have something to do with different types of gold deposits respectively. Abundances of trace elements in Au-Ag minerals are controlled by geological settings and geochemical fields. The above study provides new geological information and a new method for the study and exploration of gold deposits.

本文以金银互化物的研究为例，讨论了在不同在因类型矿床中，金－银构成一个连续的类质同象系列，且变化是有规律可循，其微量元素的含量与该矿床成矿地质环境和相应的地球化学场有关，从而为找矿提供了新的地质信息，拓宽了寻找同类伴生元素矿床或发现新类型矿床的途径。

The microstructure of ferromagnetics for Fe-Al alloys as well as the effects of alloy elements and heat treatment on the damping behavior and mechanical properties of Fe-Al based alloys have been investigated systematically by means of optical microscopy,scanning electron microscopy.

采用光学显微和扫描电子显微观察等方法，系统地研究了Fe-Al系铁磁性阻尼合金的微观组织，考察了合金元素、热处理工艺对合金阻尼性能和力学性能的影响，探讨了Fe-Al合金产生高阻尼特性的微观机制以及Fe-Al系高阻尼合金的同质和异质焊接性能。

The chemical and structural propert ies of the humic acids before and after fractionation were characterized by elem ental analyzer, Fourier transform infrared spectrometry, solid state 1 3C-nuclear magnetic resonance spectrometry (13C-NMR) and pyrolysis-gas chr omatography-mass spectrometry.

利用切面流超滤技术将Pahokee泥炭腐殖酸分为相对分子质量不同的8个级分，并综合应用元素分析和傅立叶变换红外光谱、固体13C核磁共振(13C NMR)和裂解-气相色谱-质谱技术详细研究了分级前后腐殖酸分子的结构组成特征。

The contents of Ni, Au, Mo, W of the deep-seated xenoliths and their host basalts from eastern China are inhomogeneous. The contents of Ni, Au are highest in the mantle-derived xenoliths the contents of Mo, W are highest in the basalts and the mafic granulite, and the leptite and the granitoids, respectively.

地球深部包体中镍、金、钼、钨等成矿元素的含量是不均一的，镍和金在地幔岩包体中含量最高，铝在玄武岩及镁铁质麻粒岩包体中最高，而钨在长英质麻粒岩和花岗岩类包体中含量最高。

MPS inhibits various aggressive lysosomal enzymes that degrade important constituents of connective tissue, such as elastase, collagenase and hyaluronidase.

MPS抑制了各种参与分解代谢的酶，这些酶用于降解结缔组织的重要组成元素，如弹性蛋白酶，胶原酶和透明质酸酶。

Results show that Cu, Zn, Pb, and Rb were relatively enriched in the buried paleo-surface horizon (2A) and paleo-argillic horizon (2Bt), where natural pedogenic eluviation and illuviation was playing a main role. Under the relatively warm and moist climate, Sr leaching was strong, showing entirely contrary distribution characteristics with obvious loss in the horizons of 2A and 2Bt.

结果表明，受介质的吸附、碳酸钙等易淋溶组分的淋溶淀积、作物吸收等因素影响，痕量元素Cu、Zn、Pb、Rb在剖面上总体呈中高型分布，即在干润淋溶土表层（2A层）和黏质化B层（2Bt层）含量有所增加而表现为富集；而Sr则发生强烈迁移，在2A层、2Bt层含量显著降低。

Iron-manganese cutan; matrix soil; manganese oxide; heavy metal element; soil geochemistry; 1.4 nm intergrade mineral; surface chemistry property

农业科技，农业基础科学，土壤学铁锰胶膜；基质土壤；氧化锰；重金属元素；土壤地球化学； 1.4nm过渡矿物；表面化学性质

Levorotatory and dextrorotatory enantiomers of cetirizine and other nine compounds were synthesized and were identified by MS, IR, 1H-NMR and elemental analysis .

通过化学拆分得到单一手性的4-氯-α-苯基苯甲胺，然后由它出发合成出左西替立嗪和其它九个化合物的单一对映体，并经元素分析、红外、质谱、核磁等鉴定。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。