查询词典 petroleum

Photochemical degradation is one of the major approaches to the removal of petroleum in the marine environment.

光化学降解是海洋环境中石油去除的主要途径之一。

By using phenylfluorone photometer analysis,solution of germanium content in 2-octanol and petroleum was measured.

本文采用苯基荧光酮分光光度法测定仲辛醇/石油醚溶液中锗的含量。

Faculty of Physical Science and Technology, China University of Petroleum, Dongying 257061, China

中国石油大学物理科学与技术学院，东营 257061

Faculty of Physical Science and Technology, China University of Petroleum, Shandong Dongying 257061, China

中国石油大学物理科学与技术学院，山东东营 257061

It is said that C〓 alkylthiophene probably originated from fatty acids and C〓 alkylthiophene probably derived from phytol side chain of chlorophyll. The research suggested that fatty acids such palmitic acids transformed into petroleum components more easily at lower temperature than phytol side chain of chlorophyll which transformed massively at 300℃.

据分析C〓烷基-噻吩可能源自脂肪酸，而C〓烷基-噻吩可能源自叶绿素的植醇侧链，这似乎表明，藻细胞中的脂肪酸类比叶绿素的植烷侧链更易于在较低温度下向石油组份转化，而后者在300℃时则大量转化。

The factory always insists on the principle of management that the technology is creative.the quality is superior and the client is satisfied.ln the eighties.winning the petroleum academic association API certificate of the US in national valve industries.taking the lead in introducing in the advanced technique abroad such as Japanese north village trunk-like valve agent and gained the producing licence.producing big caliber soheral valves fir coal plasm.oil and pipage and common industry soheral vavles.

在八十年代，在全国阀门行业中就首获美国石油学会API认证，率先引进日本北村阀门株式会社等国外先进技术，并获得生产许可证，生产大口径的煤浆、油、气输送管线球阀和一般工业用球阀。

Methods The activitie of anti-lipidperoxidation of Chinemys Plastrum Testudinis of petroleum-ether, acetoacetate and 95% alcohol solution from two producing areas was studied by DPPH.

方法采用DPPH法分别测定两种不同产地龟板的石油醚、乙酸乙酯、95％乙醇等不同极性溶剂提取物的抗氧化活性。

Ointment extracted from Plastrum Testudinis was separated by silica gel column chromatography, gradiently eluted by petroleum ether-ethyl acetate, and 16 (Ts-1～Ts-16) components were obtained, which were biologically evaluated by MTT assay and flow cytometry on the proliferation of rat marrow-derived mesenchymal stem cells. Results showed that Ts-12 induced proliferation compared with the control group ( p ＜0.05), while Ts-4 showed inhibitive effect. Other groups showed no significance ( p ＞0.05). GC-MS was used to analyze the chemical components in different groups.

中药龟板提取物浸膏经硅胶柱层析，用石油醚-乙酸乙酯作洗脱剂，梯度洗脱，得到16个组分；采用MTT法和流式细胞技术研究了它们对鼠骨髓间充质干细胞的增殖作用，实验结果显示组分Ts-12具有促进rMSCs增殖的作用( p ＜0.05)，而组分Ts-4则表现出抑制rMSCs增殖的作用( p ＜0.05)，其它样品对rMSCs的增殖作用不显著( p ＞0.05)，不具统计学意义。

objectiveto predict the promoting effect of chinese medicine on proliferation of rat bone marrow mesenchymal stem cells by bioactivity fingerprint in vitro.methodsthe ointment of plastrum testudinis was extracted by petroleum ether,ether and dichloromethane in burn to gain the extracts.the effects on the proliferation of bmmscs were examined by mtt assay and flow cytometry analysis, and each sample was studied by gc-ms.

目的运用生物活性指纹图谱预测其它中药能否促进骨髓间充质干细胞（bone marrow mesenchymal stem cells，bmmscs）。方法龟版浸膏依次用石油醚、乙醚、二氯甲烷提取，得到溶剂提取物，用mtt 比色法及流式细胞仪器研究了溶剂提取物干细胞活性，采用gc-ms 技术研究每一个提取物，根据总离子流色谱图的相同保留时间和相应峰面积，获得龟版浸膏 gc-ms 生物活性指纹图谱。

Net seam using servo motor driven ball screw, Tuosi plate connected to the rail line, according to instructions sliding, net seam gap arbitrarily adjusted according to actual situation, with the screen blocking the production of mining and petroleum chemical industry pharmaceutical tablets filter mesh, filter the ideal network management device.

网缝采用伺服电机带动滚珠丝杠、托丝盘连接在直线导轨上，按指令滑动，网缝间隙根据实际情况任意调节，是生产矿业用筛拦网片及石油化工医药用过滤筛网、过滤网管的理想设备。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。