dispersive liquid-liquid microextraction method (dllme) combined with high-performance liquid chromatography-ultraviolet detection (hplc-uv) was used to determine thiamine (b1), nicotinamide (b3) and pyridoxine (b6) in sour cherry juice. this method was rapid, simple and sensitive. separation was accomplished using a c18 column. the optimum chromatographic conditions were found to be: mobile ph...

background and objectives: furfural (f) and hydroxymethyl furfural (hmf) are cyclic aldehydes, which are formed during the heat processing of foods. these chemical contaminants have received much attention due to their suspected health hazards and heat damage indicators. the aim of the present study was extraction and determination of f and hmf in baby-foods using dispersive liquid-liquid micro...

SUZUKI, M., OSAWA, S. and HIRANO, M. A Lyeium Chinense Miller Component Inducing Ovulation in Adult Female Rabbits. Tohoku J. exp. Med., 1972, 106 (3), 219-231Intravenous injection of the crude extract from Lycii folium among components of Lycium chinense Miller induced ovulation in the adult female rabbit. Chemical properties of the active component of this crude extract were investigated by d...

background & aim: according to the increase in diseases such as diabetes and obesity, using of saccharose alternatives for producing of low-calorie and sugar-free alternatives, are taken into consideration of researchers and industrialists. among them, steviosidewith the 300 times more sweetness than saccharose has special place, due to is a natural. the aim of this study is optimizing of stevi...

determination of drug residues in food is of great importance due to their toxicity. long-term exposure with low level of drug residues could be important, especially in children. based on document study, oxytetracycline (otc) is a prophylaxis and treatment agent for great number of diseases and possesses a broad spectrum activity against many pathogenic organisms and can be toxic or cause alle...

this study a novel high performance liquid chromatography for the assay of nystatin in oral and vaginal tablets were optimized and validated using box–behnken experimental design. the method was performed in the isocratic mode on a rp-18 column (30 °c) using a mobile phase consisting of 0.05 m ammonium acetate buffer/ methanol mixture (30:70) and a flow-rate of 1.0 ml/min. the method was valida...

purpose : fluoroquinolones are widely used antibiotic for prophylaxis of intra and postoperative infections in individuals undergoing cataract surgery. this study was designed to assess the penetration of ciprofloxacin into the ocular aqueous humor (topical only versus topical and oral administration). methods : studied population (n=47) consisted of two groups: group one (n=26) and group two (...

background aflatoxins are one of the most potent toxic substances that occur naturally. nowadays extensive attention has been taken to their existence in food and environment, as there is the possibility of harm to humans following chronic exposure to extremely low levels via food chain. aflatoxin m1 (afm1) is a hepatic carcinogenic metabolite found in the milk of lactating animals fed with con...

in this project, eggshell membrane was used as a solid phase extraction sorbent for extraction of morphine followed by hplc analysis. at first, raw eggshell membrane was used and then, because of low adsorption of morphine on untreated eggshell membrane (