Human hair keratin films were used in order to examine the e#ects of reducing and oxidizing agents. Thioglycolic acid and sodium bromate were employed as reducing and oxidizing agents, respectively. The white and opaque appearance of the keratin films turned transparent as the concentration of thioglycolic acid increased. However, when followed by the oxidizing treatment, the keratin films retu...

bioleaching is the extraction of metals from their ores through the use of microorganisms. inthis process, the use of native bacteria leads to achieve more yields of metals. so, in the presentstudy, native sulfur-oxidizing bacterium in potentiality of uranium extraction was isolated fromghachin mine in iran and identified by partial gene sequencing. for this purpose, the watersamples were colle...

Solar radiation and nutrient pulses regulate the ecosystem's functioning. However, little is known about how a greater frequency of pulsed nutrients under high ultraviolet radiation (UVR) levels, as expected in the near future, could alter the responses and interaction between primary producers and decomposers. In this report, we demonstrate through a mesocosm study in lake La Caldera (Spain) t...

Simon, Felipe, Diego Varela, Ana Luisa Eguiguren, Laı́n F. Dı́az, Francisco Sala, and Andrés Stutzin. Hydroxyl radical activation of a Ca -sensitive nonselective cation channel involved in epithelial cell necrosis. Am J Physiol Cell Physiol 287: C963–C970, 2004. First published May 26, 2004; 10.1152/ajpcell.00041.2004.—In a previous work the involvement of a fenamate-sensitive Ca activated nonsel...

Ammonium dinitramide (ADN) is a promising oxidizing agent for solid rocket propellants. In situ XRD investigations of ADN and suspensions have been performed in order to understand refine the emulsion crystallization process manufacturing spherical particles (prills). The investigation revealed that melt behavior depends on quality, humidity, maximum temperature cycles, suspension agents. Furth...