生物成因的

The most common biogenetic minerals are carbonates, sulfides and iron oxides.

最普遍的生物成因矿物有碳酸盐、硫化物和铁的氧化物。

Its research areas Include: Climatology and biometeorology; Rainfall and its biological effects; Erosion and the deposition of sediments: dust storms; Dunes, their structure and formation; Microclimatology; Dew and hygroscopic moisture; Soil flora and fauna in arid lands; Seed germination and its improvement; Vegetational studies in desert regions worldwide; The physiology and ecology of plants and animals; Foraging patterns of mammals; Parasites and predators; Diurnal rhythmicity and phenology; The impact of grazing; Wildlife conservation; Anthropology and sociology of desert peoples; Oasis settlement; Human ecology and traditional land use; Land classification and improvement; Water control; Remote sensing; Desertification, its causes and control.

具体内容包罗万象：气候学和生物气象学；降雨和它的生物影响；沉积物的腐蚀和沉积；沙丘结构和形成；干旱地区的植物和动物群；寄生物和捕食动物；干旱地区的人类学和社会学；干旱地区的绿地建设；水控制和干旱地区的沙漠化的成因和控制等。

A surface-modified adsorbent is a support bearing at the surface of a chemically bonded "monomolecular" layer of adsorbing groups, which provides fast kinetics of the recovery and elution of the molecules and ions under study.5–9 SPE by use of alkyl-bonded silica gels has been widely applied in the environmental analysis of polyaromatic hydrocarbons, pesticides, substances of biochemical origin and other organic compounds.

表面改性吸附剂是一种载体，它负载在一层化学键合的单分子吸附性官能团的表层，为所研究的分子和离子的回收和洗脱提供了快速动力。使用含烷基的硅胶的SPE技术已经被广泛应用到芳烃聚合物、农药、生物成因物质以及其他有机化合物的环境分析中。

The author respectively gave a brief account of the basic characteristics of ancient and today's geothermic field at 1000m and 2000m depth, coal measure strata pressure field at the depth less than 1600m, structural stress field from Jurassic to present, and ancient and today's fluid potential field (that is water potential and gas potential distributing in coal measure strata).

在本区瓦斯分带、已知煤层气显示及其组分研究基础上，探讨了低煤级煤层气的生成机制，指出生成的煤层气应包括褐煤阶段的原生生物甲烷气、长焰煤—气肥煤阶段的热成因甲烷气和煤层埋藏阶段的次生生物甲烷气三种成因甲烷气体；进而论述了煤储层含气饱和度、临界解吸压力、临储压力比、地解压差等甲烷解吸特征，实测与理论含气量、煤层气资源量与资源丰度等煤储层含气性特征。

Especially, the typically stromatolitic pyrite, micro-strawberric pyrite, microgranular pyrite and rarely helical and silky pyrite have roughly been explained with the biogenic agency.

特别对较典型的叠层石黄铁矿、显微莓球黄铁矿、黄铁矿的微小球粒及较罕见的螺旋状和丝状黄铁矿用生物成因进行了初步解释。

The paper adopts some methods such as gas composition, carbon isotope, systematical analyzing and testing of reservoir bitumen biomarker from high evolutional natural gas and quantitative calculation of mixed gas, illustrates that natural gas from the section Ⅱ of Jialingjiang formation is mainly attributed to sapropel type organic matter gas of Permian, comes from carbonatite hydrocarbon rocks Permian which most of them are overmature, its main gas source has nothing to do with carbonatite hydrocarbon rocks of Jialingjiang formation themselves, presents in geochemistry characteristics of oil type cracked gas.

摘要通过对川中－川南过渡带西部的磨溪－潼南地区嘉二段天然气组成、碳同位素组成、高演化天然气储层沥青生物标志化合物的系统分析测试和混合成因气的定量估算，阐明了该区嘉二段天然气主要属于二叠系腐泥型有机质成因气，来源于二叠系过成熟为主的碳酸盐岩烃源，主力气源与嘉陵江组自身的碳酸盐岩烃源无关，并具有油型裂解气的地球化学特征。

This paper introduces the geneses of the sludge bulking and the operation mechanism of bio-selector, advances a simple and easy design method of flocculation burden, and expounds the design method of the bio-selector.

简要介绍了污泥膨胀的成因和生物选择器的工作机理，提出了一种简便易行的絮体负荷设计方法，并论述了生物选择器的设计方法。

The formation and geology research of biogenic gas has been more regarded in recent years.

生物气的成因和地质研究近年来越来越受到人们的关注和重视。

The crystal constant of α has a range from 0.932 nm to 0.933 nm with an average of 0.933 nm. Various replacement and remnant structures show that the phosphorates in submarine guyots are mainly of replacement origin.

各种交代残余结构（交代角砾状结构、交代生物结构、交代凝灰结构、交代生物假象结构、交代填间结构等）表明，太平洋水下海山上的磷酸盐主要属交代成因。

The slightly negative δ^30Si values of both thick-bedded and anatase-rich siliceous rocks are similar to those of hydrothermal and biogenic siliceous rocks. The ranges and mean values of δ^18O values are similar.

两种硅质岩的δ^30Si值为变化较小的负值，与热水沉积和某些生物成因硅质岩的硅同位素组成相似，两者的δ^18O值范围和平均值均相似。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。