In order to produce biodiesel from waste cooking oil and optimize its yield, a two-stage process of esterification/ transesterification has been used in this study. First, we used the acidic catalysts H2SO4 in order to diminish the content of free fatty acid (FFA) in oil that caused reducing the oil acidity from 6.1% to 0.57% through esterification. Then, the biodiesel was produced by transeste...

(1995) Chemical Analysis for Antibiotics Used in Agriculture. Arlington: AOAC International. O’Keeffe M (ed.) (2000) Residue Analysis in Food } Principles and Applications. Amsterdam: Harwood Academic Publishers. Proceedings of the International Symposium on Analysis of Anabolizing and Doping Agents. I: Ghent, 1988: J. Chromatogr. 489 (1989). II: Ghent, 1990: J. Chromatogr. 564 (1991). Ghent, B...

morganella morganii is rarely isolated from nosocomial infections. however, postoperative infections due to morganella spp. were documented in literature and eye involvements of the infections usually result in severe sequels.  we present a severe case infection, which was caused by m. morganii subsp . morganii, firstly appearing as conjunctivitis and complicated by bacteremia. the infectious a...

a few numbers of patients admitted to the emergency department due to the lunate dislocation can cause a direct injury to the wrist ligament, which mainly occurs after wrist trauma, and often diagnosis is far from the mind. a 32 years old man due to severe pain and tenderness of the wrist started the previous day during swimming, referred to emergency department of imam reza hospital of mashhad...

BACKGROUND The purpose of this study was to optimize the electrophoretic conditions that should be used for the effective isolation of functional human spermatozoa and to determine whether this method of isolating cells was associated with oxidative stress and DNA damage. METHODS Human spermatozoa were prepared by repeated centrifugation, discontinuous density gradient centrifugation and elec...