نتایج جستجو برای: alteration index
تعداد نتایج: 439976 فیلتر نتایج به سال:
The Bundelkhand-Aravalli craton is the most important lithotectonic unit in the central and western India where Paleoproterozoic Aravalli Supracrustal sequence has been deposited over an Archaean basement, the latter also known as the Banded Gneiss Complex (BGC). A NE-trending linear metasedimentary sequence, designated as the Jahazpur Belt occurs along the eastern fringe of the Aravalli Superg...
بررسی تغییر جرم عناصر در فرایندهای اسکارنیفیکاسیون در شرق رودخانه سونگون- چای، شمال شرق تبریز، ایران
Copper-bearing skarn zone in east of Sungun-Chay river is located about 100 km NE of Tabriz, and was developed along the contact of the mineralized porphyry granitoid stock (Oligo-Miocene) with impure carbonate rocks (Upper Cretaceous). Both endoskarn and exoskarn occurred in this zone. Endoskarn is narrow (~0.5-2m) whereas exoskarn is relatively broad (25-55m) and contains minerals such a...
Bijvard prospect area is located in the northern part of Central Iran zone, Sabzevar zone, about 40 km north of Bardaskan. The rock units exposed in the area include Cretaceous volcano-sedimentary rocks (andesite, basalt, graywacke and conglomerate) that syenogranite porphyry unit has intruded into them. Mineralization has structural control, with N35E trending, and has altered the andesitic r...
Sar-Kuh porphyry copper deposit is located 6 km southwest of the Sar-Cheshmeh copper mine, Kerman Province, Iran. Based on field geology, petrography and fluid inclusions studies, four alteration types have been identified in the Sar-Kuh area. Early hydrothermal alteration formed a potassic zone in the central parts of Mamzar granite/grano-diorite stock and propylitic alteration in its peripher...
OBJECTIVE Previous studies have revealed the association of lead (Pb) exposure with obesity. DNA methylation alteration has been suggested to be one of the regulatory mechanisms of obesity. We aimed to explore whether Pb exposure is related with weight gain and DNA methylation alteration. METHODS Male adult 8 week Wistar rats were divided into 5 groups: the normal chow diet (NCD); the NCD+0.0...
Wettability alteration is one of the most important methods for oil recovery from sandstone and carbonate reservoirs. The effects of salinity, pH, temperature, and chemicals such as surfactants and fatty acids on the alteration of the wettability were described in previous studies. In recent years, attention has been directed to nanoparticles as a wettability alteration agent. The effect of som...
Objective Antenatal anxiety or maternal stress is a prevalent chronic mental disorder in pregnant women. We assessed the effect of maternal stress because of positive aneuploidy screening results on the alteration of uterine artery’s blood flow. MaterialsAndMethods A prospective cohort (one sample) study as a pilot study was done at a hospital in Tehran. Sixty pregnant women who were candidates...
In the present study, we have tried to establish the correlation between changes in Zeta potential with that of cell surface permeability using bacteria (Escherichia coli and Staphylococcus aureus). An effort has been made to establish Zeta potential as a possible marker for the assessment of membrane damage, with a scope for predicting alteration of cell viability. Cationic agents like, cetyl ...
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