نتایج جستجو برای: high performance liquid chromato graphy
تعداد نتایج: 2998417 فیلتر نتایج به سال:
background : doogh is a fermented beverage in which microbial spoilage is possible. benzoic acid and its salt (sodium benzoate) are added to doogh as antimicrobial preservative to control microbial spoilage. however, the use of this preservative has been prohibited in milk and dairy products such as food and drug administrationand institute of standards and industrial research of iran. thus, th...
introduction: the mechanism of action and metabolism of clozapine, a complex drug used in psychopharmacology, is not completely understood. the effects of this compound in human body are related to some interactions with serotonin and dopamine neurotransmitter receptors. to further elucidate the mechanism of action and to support ongoing drug metabolism studies, [14c] clozapine with suitable ra...
با توجه به شیوع فراوان تالاسمی در ایران ضرورت تحقیق در مورد ساده ترین ، ارزانترین و دقیق ترین روشی که سبب یافتن ناقلین بدون علامت بالینی می شود اهمیت وافری دارد. تالاسمی یک گروه ناهمگن از اختلالات ارثی سنتز هموگلوبین بوده و مشخصه این اختلال ، تولید معیوب زنجیره های هموگلوبین می باشد.در این اختلال میزان سنتز زنجیره ها کاهش یافته ، اما زنجیره تولید شده در اکثر موارد دارای ساختاری طبیعی می باشد و ...
چکیده ندارد.
the lack of authentic standards has limited the quantitative analysis of herbal drugs in biological samples. the present work demonstrated a practicable strategy for the assay of herbs and their metabolites independent of authentic standards. a liquid chromatography–electrospray ionization–mass spectrometry (lc–esi–ms) method for the qualitative and quantitative determination of the metabolites...
objective(s) developing and validating a simple, efficient, reproducible and economic reversed phase high performance liquid chromatographic (rp-hplc) method for the quantitative determination of pefloxacin in bulk material, tablets and in human plasma. materials and methods a shim-pack clc-ods column and a mobile phase constituting acetonitrile: 0.025 m phosphoric acid solution (13:87 v/v, ph ...
the occurrence and fate of trace-level contamination of pharmaceuticals in the aquatic environment has been recognized as one of the emerging issues in environmental chemistry. the effluents of wastewater treatment plants, usually directly emitted to the environment, often contain the anti-inflammatory drug diclofenac. diclofenac was chosen because it is of high consumption; by background liter...
growing demands and requires of high data rate systems cause significant increase of high frequency systems for wideband communication applications. as mixers are one of the main blocks of each receivers and its performance has great impact on receiver’s performance; in this thesis, a new solution for ku-band (12-18 ghz) mixer design in tsmc 0.18 µm is presented. this mixer has high linearity a...
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