نتایج جستجو برای: palygorskite
تعداد نتایج: 265 فیلتر نتایج به سال:
Asbestos exhibits many properties of classical tumor pro moters. These characteristics include the ability to stimulate proliferation and inhibit normal differentiation of cells. In organ cultures of trachea, crocidolite and amosite asbestos stimulate squamous metaplasia, a pathological process in which a rapidly proliferating squamous epithelium replaces the normal epithe lium. We hypothesized...
Surfactant-modified minerals have been widely used for the sorption of anionic and non-polar organic contaminants. This paper investigates the regeneration of various hexadecyltrimethylammoniun bromide (HDTMA)-modified natural minerals saturated with chromate anions using different solutions for the extraction of chromate that has been sorbed at optimum conditions. The examined minerals include...
Najafi-Ghiri M., Abtahi A. (2013): Potassium fixation in soil size fractions of arid soils. Soil & Water Res., 8: 49–55. Amounts of potassium (K) fixed in soil fractions of 10 calcareous soils of southern Iran were measured to evaluate the contributions of different soil size fractions to K fixation. Soil particles were fractionated after dispersion of the soils with an ultrasonic probe. Potass...
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