نتایج جستجو برای: dispersed mineralization zones

تعداد نتایج: 82469  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Alexander Guhr Werner Borken Marie Spohn Egbert Matzner

The desiccation of upper soil horizons is a common phenomenon, leading to a decrease in soil microbial activity and mineralization. Recent studies have shown that fungal communities and fungal-based food webs are less sensitive and better adapted to soil desiccation than bacterial-based food webs. One reason for a better fungal adaptation to soil desiccation may be hydraulic redistribution of w...

Journal: :iranian journal of earth science 0
w. mammo ghebre geological survey of ethiopia, p.o.box 2302, addis ababa, ethiopia,

the bikilal layered gabbro-complex is composed of zones/layers of olivine/ pyroxene gabbro and hornblende gabbro. within the hornblende gabbro, repeated lens-like thin and elongated bodies of hornblendite are found intimately associated with massive and disseminated ilmenite-magnetite bodies, in places with apatite. petrological examination of the hornblende gabbro shows 50-55% hornblende, 40-4...

Journal: :Environmental Health Perspectives 1995
W C Ghiorse J B Herrick R L Sandoli E L Madsen

Microbial activity patterns at buried coal-tar disposal sites have been under investigation for several years to determine the response of naturally occurring microflora to polycyclic aromatic hydrocarbons (PAHs) at the sites. At one site in upstate New York, data have shown enrichment of PAH-degrading bacteria in subsurface contaminated zones but not in uncontaminated zones. Similar work at a ...

Hidarian Shahri, mohammadreza, Kazempour, mohammadreza, Malekzadeh Shafaroudi, Azadeh,

Freezi Lead- Zinc- Copper prospect area is located in north east Mashhad in Khorassan Razavi Province. Mineralization was formed in the area as vein type in the host rocks of slate with interlayer of phyllite and meta sandstone of Upper Triassic to Early Jurassic age (equivalent to Shemshak Formation). The only alteration in the host rock is silicification. Primary minerals are quartz, galena, ...

Journal: :Crystals 2023

Extensive exploration is required to deploy mineralization as a tool develop low-cost yet efficient sustained drug release systems. Unlike previous studies which directly incorporated components in mineralized products, we propose an emerging approach synthesizing drug-loaded CaCO3 composites, relying on the synergistic occlusion of molecular solutions comprising both alginate hydrogel matrices...

Journal: :Remote Sensing 2013
Lei Liu Jun Zhou Dong Jiang Dafang Zhuang Lamin R. Mansaray Bing Zhang

The Xiemisitai area, West Junggar, Xinjiang, China, is situated at a potential copper mineralization zone in association with small granitic intrusions. In order to identify the alteration zones and mineralization characteristics of the intrusions, Landsat Enhanced Thematic Mapper (ETM+) and Quickbird data of the study area were evaluated in mapping lithological units, small intrusions, and alt...

Journal: :زمین شناسی اقتصادی 0
محمد ابراهیمی حسین کوهستانی احسان شهیدی

introduction mesgar iron occurrence is located in northwestern part of the central iran, 115 km south of zanjan. although there is a sequence of volcanic-pyroclastic rocks accompanied by iron mineralization, no detailed works had been conducted in the area. the present paper provides an overview of the geological framework, the mineralization characteristics, and the results of geochemical stud...

Journal: :International Journal of Science and Engineering Applications 2018

Journal: :The Journal of Cell Biology 1982
A R Poole I Pidoux L Rosenberg

The hypothesis is widely held that, in growth plate during endochondral ossification, proteoglycans in the extracellular matrix of the lower hypertrophic zone are degraded by proteases and removed before mineralization, and that this is the mechanism by which a noncalcifiable matrix is transformed into a calcifiable matrix. We have evaluated this hypothesis by examining the immunofluorescent lo...

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