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影响浸铀细菌活性的因素初探 被引量:5
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作者 石健 茅均标 《现代地质》 CAS CSCD 2002年第3期312-317,共6页
微生物浸铀技术可以大幅度提高难浸铀矿石的浸出率 ,其关键技术是培养高活性的菌种。为了培养能适应多种恶劣条件的高活性菌种 ,必须对影响浸铀微生物活性的各种因素进行研究。通过实验室对浸铀细菌硫杆菌属中的氧化亚铁硫杆菌的活性因... 微生物浸铀技术可以大幅度提高难浸铀矿石的浸出率 ,其关键技术是培养高活性的菌种。为了培养能适应多种恶劣条件的高活性菌种 ,必须对影响浸铀微生物活性的各种因素进行研究。通过实验室对浸铀细菌硫杆菌属中的氧化亚铁硫杆菌的活性因素的研究 ,并结合实际对从江西山南矿区的野外矿样中分离筛选出的菌株的活性的影响因素作了初步探讨 ,认为pH值为 1 8、温度为 30℃、接种量为 2 0 %及 90r/min的充气条件是该硫杆菌最佳的培养条件。通过对磷、铀两种元素在不同浓度下对细菌活性影响的试验 ,得出高浓度的磷、铀对细菌有明显的抑制作用 ,但通过驯化可以降低及弱化这种抑制作用。 展开更多
关键词 铀矿石 浸铀细菌 氧化亚铁硫铁菌 细菌活性 接种量 充气条件 PH值 温度
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Study of Effective Ingredient on the Landslides ot Isfahan Province
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作者 Mojgan Entezari Somayeh Sadat Shahzeidi 《Journal of Earth Science and Engineering》 2014年第2期107-112,共6页
Usually landslide studying investigates the facts such as gender land, atmospheric rainfall, gradients' change, earthquake, volcanic eruption, subterranean water vibration, and human causes in the form of different m... Usually landslide studying investigates the facts such as gender land, atmospheric rainfall, gradients' change, earthquake, volcanic eruption, subterranean water vibration, and human causes in the form of different models. However, the facts can have main share in appearing this phenomenon but correlative and sufficient condition for genesis and such a phenomenon is historical base of lands' bed that has experienced specific formative process. In the case of distribution and dispersion of slides and their reasons of occurring in lsfahan, general studying has also been carried out. And this article has investigated this phenomenon on the other aspects and has tried to reveal this phenomenon's effect on instigating instabilities, so that it can conclude distribution of this phenomenon references to climate on one side and historical formative process on the other side. It aims to study this effect by using IDW (Inverse Distance Weighting), Kiriging method in ArcGIS 9.3 software dispersal map of Isfahan's main landslides and formative systems on the other side and by local analyzing these two collections evaluated their vicinity relation using local-statistical ways. Results of this research will show that in the past the main part of this landslide has occurred in cold hole and seldom occurred in hot hole. 展开更多
关键词 Landslide cold hole hot hole climatic formative system IDW Kiriging method.
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