large reserves of coal in tabas region of iran are characterized by low ash and high caking index, suitable for use in metallurgy as coking coal. however, these coals cannot be gainfully utilized because of their high sulfur content. in this work, studies on desulfurization of tabas coals were carried out in a batch reactor using various reagents. the most effective reagents, fe2(so4)3 , fecl3 ...

background chitosan is a naturally occurring biopolymer which has been widely used in a variety of biomedical applications including local antibiotic delivery due to its excellent mechanical properties, biodegradability and biocompatibility. beads are spherical, porous carriers which are prepared from various materials including chitosan. objectives the current study aimed to fabricate a new co...

new, simple and cost effective spectrophotometric methods have been developed for the quality assessment of isoniazid (inh), in bulk and in pharmaceutical formulations by using novel reagents. the proposed methods involve the utility of ethyl 2-[(e)-(4-hydroxyphenyl) diazenyl]-3-oxobutanoate and benzil as novel reagents for the determination of inh. developed methods are based on the condensati...