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- The crude oils of Chang 20 belong to typical immature oil which have odd even predominance and lower ratios of sterane and terpane maturity index. 从长20井低熟原油中检测到了一定量的28，30二降藿烷，这说明源岩形成于极度厌氧的环境。
- Through comparing experiments, it was found that this method has special dominance in checking trace biomarkers and in determining nature and fixing quantity of a complex sterane and terpane. 色谱-质谱-质谱由于是两级质谱串联比色谱-质谱增加了选择性,有了更强的分离能力,提高了对复杂混合物如甾、萜类化合物定性和定量的可靠性。
- Behavior of sterane and terpane molecular components in PVT fractionation experiment PVT分馏实验中甾、萜烷分子的行为
- Keywords Tianjin;surface soil;horizon compared;normal alkanes;sterane and terpane;pollution source; 天津;表层土壤;分层对比;正构烷烃;甾、萜烷烃类;污染源;
- sterane and terpane 甾、萜烷烃类
- Steranes and terpanes are widely used in petroleum geochemistry study since they are important indexes for oil sources correlation and oil and gas migration. 摘要甾萜类生物标志化合物作为油源对比和油气运移的重要指标，在油气地球化学研究中得到了广泛的应用。
- Steranes and terpanes exist in saturated hydrocarbon component of oil and source rock,and they are usually identified by gas chromatogram-mass spectrum. 甾萜类化合物存在于原油和生油岩的饱和烃组分中,通常用色谱-质谱法鉴定。
- Abundant molecular biomarkers, including n-alkanes, isoprenoid, steranes and terpanes, are detected by GC-MS in mudstone and sandstone samples from Tanhai Sanma area in the Huanghua Depression. 通过对黄骅坳陷滩海三马地区浊流沉积层序的生物标志物组合差异特征研究，揭示出分子标志物对该地区沉积相的指示意义。
- Moreover, ringA , ring C aromatic sterane and ringA,B, C aromatic sterane were identified from the low temperature aromatic fractions of thermal simulation of p ine pollens. 此外，松粉低温热模拟样品的芳烃馏份中检出单、三芳甾烷。
- I hit him fair and square on the jaw. 我不偏不倚打中他的下巴。
- It is a fact of life and you must face it. 这是严酷的现实，你必须面对它。
- She and I can't live under the same roof. 她和我不能住在一起。
- She had to scrimp and save to pay for her holiday. 她不得不为付假期的费用而苦苦攒钱。
- I'll try and rustle you up something to eat. 我设法给你弄点吃的。
- He sprang up and rushed to the door. 他跳起身，跑到门口。
- He took sick and died a week later. 他得了病，一周后就死去了。
- He's been in and out of prison for years. 他多年来屡次进出监狱。
- The air in the garden was warm and fragrant. 花园里的空气一片温馨。
- The child was tired and fretful. 那孩子又疲倦又烦躁不安。
- Routine office work is my bread and butter. 日常的办公室工作是我的谋生之道。
