oligotrophic bacteria是什么意思

用法例句

Thirty-eight oligotrophic bacteria were isolated from different environment and their 16S rDNA sequences were analyzed.

从不同环境中分离出38株贫[营]养细菌。

Lower solution treatment temperature of the raw material made the carbide didn't dissolve completely and distributed along the grain boundary like network,so poor chrome happened near the grain boundary and intercrystalline corrosion is produced.

通过对失效件0Cr18Ni9不锈钢制连接螺栓进行失效分析,得出其断裂原因为原材料固溶处理温度偏低,碳化物未充分溶解,并沿晶界呈网状分布,造成晶界附近贫铬,产生晶间腐蚀。

Lower solution treatment temperature of the raw material made the carbide didn t dissolve completely and distributed along the grain boundary like network,so poor chrome happened near the grain boundary and intercrystalline corrosion is produced.

通过对失效件0Cr18Ni9不锈钢制连接螺栓进行失效分析,得出其断裂原因为原材料固溶处理温度偏低, 碳化物未充分溶解,并沿晶界呈网状分布,造成晶界附近贫铬,产生晶间腐蚀。

Selective catalytic reduction of NO by H2 (H2-SCR) under lean burn conditions at low temperature (60-260 ℃) was studied over the SAPO-34-supported platinum catalyst.

考察了贫燃条件下Pt/SAPO-34催化剂低温(60～260℃)选择催化还原(H2-SCR)消除NO的催化性能,研究了载体、金属负载量和反应条件对催化性能的影响。

Cu ion exchanged Al MCM 41 catalyst samples with different Si/Al ratios were studied for the selective reduction of NO by propylene under lean burn conditions.

采用连续流动固定床石英反应器 ,在反应气体为 0 1%NO ,0 1%C3 H6,2 %O2 ,流量为 5 0 0ml/min以及催化剂装量为0 1g的条件下 ,考察了Cu Al MCM 4 1的Si/Al比值对贫燃条件下NO选择性还原活性的影响 。

A study of the ore loss and dilution in bottom-pillar-free stepped collapse mining;

无底柱分段崩落采矿法的损失、贫化问题探讨

Brief analysis of loss and dilution of ore in Helanshan Phosphate Mine;

贺兰山磷矿矿石损失贫化浅析

Practice of ore dilution management in Tiegukeng open pit mine;

铁古坑露天矿矿石贫化管理的实践

This article presents the process characteristics of mild Primary reforming,excessive air in Secondary reformer,MDEA carbon removal technology of BASF and cryonic purification process in Fudao second stage ammonia project aimed at lean gas,analyzes the problems of utilizing lean gas during,and proposes countermeasures.

介绍中海石油化学股份有限公司富岛二期项目针对贫气所采用的温和一段转化、二段炉加过量空气、BASF节能型MDEA脱碳工艺、深冷净化等工艺特点,分析了利用贫气生产过程中所遇到的问题,并提出了对策。

Under a state of cold start,mid lean-burn,the challenge and existing questions of automotive catalysts are proposed.

对目前国内外汽车尾气净化催化剂主流技术,即贵金属三效催化剂、过渡金属氧化物催化剂、分子筛催化剂以及双功能催化剂进行了综述,提出了目前汽车冷启动尾气催化净化、贫燃尾气治理所面临的挑战和存在问题。

Research on the selective reduction of NOX with hydrocarbons under lean-burn conditions using metal oxides catalysts has been reviewed.

综述了在贫燃条件下以碳氢化合物为还原剂,在金属氧化物催化剂催化下对NOX选择还原的研究进展,主要介绍了以Al2O3为载体的氧化物催化剂的组分和制备方法等对催化剂结构和催化性能的影响,对催化剂的抗二氧化硫和水的性能也做了介绍,然后指出了金属氧化物催化剂的发展方向。

Catalytic removal of NO x under lean-burn conditions is summarized in this article.

本文对贫燃条件下NOx 的催化净化进行了综述与探讨 ,着重评述各种催化剂的优缺点及国内外相关领域的科研开发与进展 ,提出开发贫燃条件下汽车尾气净化催化剂尚需解决的问题和今后的研究方向 ,并指出了以后可能应用于实际的催化

The reasonable improvement of the lean oil technics in crude benzene tower and heat exchanger of lean and fat oil is introduced according to the practical conditions after reconstruction.

分析了浮头式列管换热器的故障现象及产生原因,提出改造方案,并根据改造后的实际情况将脱苯塔和贫富油换热器部分的贫油工艺进行了合理改进。