نتایج جستجو برای: revers phase chromatography

تعداد نتایج: 689783  

Journal: :journal of chemical health risks 0
aldo pacheco ferreira

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...

Journal: :Complex Systems 1993
A. S. Fokas H. Madala

We st udy one-dimensional cellular auto mata using two different formul ations, one polynomial and one involving mod 2. Emphas is is placed on the existence of coherent st ructur es. Several new filter CAs are foun d that are capable of supporting either at t rac tors or solitons. Some of t hese new rules are revers ible.

2003
M. Dachtler

Looking to the future, evolutionary development can be expected because the separating power of multidimension liquid chromatography is greatly increased over single-dimension liquid chromatography. The simultaneous improvements on both the software and the chromatographic apparatus will lead to a system capable of automatically developing analytical methods for a wide range of analytes in many...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت معلم تهران - دانشکده علوم 1370

determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

Journal: :Documentation et bibliothèques 1996

Journal: :iranian journal of basic medical sciences 0
amir hooshang mohammadpour pharmaceutical research center, department of pharmacodynamics and toxicology, school of pharmacy, mashhad university of medical sciences, mashhad, iran mohammad ramezani 2pharmaceutical research centre, department of biotechnology, school of pharmacy, mashhad university of medical sciences, mashhad, iran nasim tavakoli anaraki 1pharmaceutical research center, department of pharmacodynamics and toxicology, school of pharmacy, mashhad university of medical sciences, mashhad, iran bizhan malaekeh-nikouei 3nanotechnology research centre, department of pharmaceutics, school of pharmacy, mashhad university of medical sciences, mashhad, iran sara amel farzad2 2pharmaceutical research centre, department of biotechnology, school of pharmacy, mashhad university of medical sciences, mashhad, iran hossein hosseinzadeh 1pharmaceutical research center, department of pharmacodynamics and toxicology, school of pharmacy, mashhad university of medical sciences, mashhad, iran

objective(s):the present study reports the development and validation of a sensitive and rapid extraction method beside high performance liquid chromatographic method for the determination of crocetin in human serum. materials and methods:the hplc method was carried out by using a c18 reversed-phase column and a mobile phase composed of methanol/water/acetic acid (85:14.5:0.5 v/v/v) at the flow...

Journal: :iranian journal of toxicology 0
محمود علی محمدی mahmood alimohammadi department of environmental health engineering, school of public health, tehran university of medical sciences, tehran, iran. مریم محراب بیگی maryam mehrabbegi students' scientific research center, tehran university of medical sciences, tehran, iran. شاهرخ نظم آرا shahrokh nazmara department of environmental health engineering, school of public health, tehran university of medical sciences, tehran, iran. محسن حقیقی mohsen haghighi dashtappeh department of environmental health engineering, school of public health, kashan university of medical sciences, kashan, iran. وحید کاظمی مقدم vahid kazemi moghaddam department of environmental health engineering, school of public health, kashan university of medical sciences, kashan, iran.

background: bisphenol a (bpa) is one of the hazardous materials causing disruption of endocrine pathways. due to water contamination by this component from multiple sources and the associated health problems, bpa has been the focus of multiple studies. it has been proved that bpa may cause harm because of its impact on estrogenic receptors in human and other organisms. methods: in this study, t...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2014
mansoor anbia morteza khazaei

in this paper, the possibility of using a new ordered nanoporous carbon as a new fiber in headspace solid phase microextraction (hs-spme) to determine of mononitrotoluenes (mnts) in waste water is demonstrated. the structural order and textural properties of the ordered nanoporous carbon were studied by x ray diffraction (xrd), scanning electron microscopy (sem) images and nitrogen adsorption i...

Journal: :caspian journal of chemistry 2014
mohammad h fatemi hanieh malekzadeh alireza ghassempour vahide mahdavi

a combined gas chromatography–mass spectrometry (gc–ms) with headspace solid-phase microextraction (hs-spme) method has been employed for the analysis of the flavor volatiles of some iranian rice cultivars (domsiah, deylamani, hashemi, shirodi and tarom). the samples were grown in different cities of mazandaran province. the sampling procedure and chromatographic conditions were same for all sa...

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