نتایج جستجو برای: liquid chromatographymass spectrometry

تعداد نتایج: 292040  

2015
H. Abirami Muhammad Ilyas Prem Kumar Nargis Begum

The aim of this study is to evaluate the bioactive compounds in the ethanolic leaf extract of Azima tetracantha by using Gas chromatographyMass Spectrometry (GCMS). Azima tetracantha leaves were collected from Ariyalur District, Tamil Nadu. The dried leaf powder was extracted with the solvent ethanol by using Soxhlet apparatus. One microlitre of the extract was subjected for analysis by GCMS to...

Journal: :Indian Journal of Pharmaceutical Sciences 2021

This study aims to determine the chemical and physical composition antibacterial activity of glasswort. Soxhlet extraction S. europaea was performed using Hexane analyzed by Gas chromatographymass spectrometry. Alpha-tocopherol content analysed Liquid chromatography with tandem mass The elemental analysis investigated inductively coupled plasma crystallographic texture powder samples were deter...

2005
Roland Schauer Ashok K. Shukla Cornelia Schröder Ernst MUller

Sialic acids have been found to mask antigens, receptors and other recognition sites on molecules and cells. This has been investigated best with hepatocyte and macrophage lectins which recognize 13-galactose and N-acetyl-13-galactosamine residues on molecules and cells exposed by sialidase treatment. The lectin on macrophages leads to the binding and phagocytosis of erythrocytes after the enzy...

Journal: :journal of the iranian chemical research 0
majid ramezani department of chemistry, faculty of science, islamic azad university, arak branch, arak, iran mohsen heidarzadeh department of chemistry, faculty of science, islamic azad university, arak branch, arak, iran fatemeh yousefi department of chemistry, faculty of science, islamic azad university, arak branch, arak, iran

a simple, rapid and efficient dispersive liquid–liquid microextraction by use of ionic liquid (il-dllme)method, followed by flame atomic absorption spectrometry (faas) was developed for the preconcentrationand determination of palladium in water samples. in this method, an appropriate mixture of acetone and octylmethyl imidazolium hexafluorophosphate was injected rapidly into the aqueous sample...

2013
Michael P. CALLAHAN Aaron S. BURTON Jamie E. ELSILA Eleni M. BAKER Karen E. SMITH Daniel P. GLAVIN Jason P. DWORKIN

The investigation into whether Mars contains signatures of past or present life is of great interest to science and society. Amino acids and nucleobases are compounds that are essential for all known life on Earth and are excellent target molecules in the search for potential Martian biomarkers or prebiotic chemistry. Martian meteorites represent the only samples from Mars that can be studied d...

Journal: :iranian journal of pharmaceutical research 0
arezoo asgari department of pharmacology and toxicology, school of pharmacy, zanjan university of medical sciences, zanjan, iran. farzad kobarfard department of medicinal chemistry, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. phytochemistry research center, shahid beheshti university of medical sciences, tehran, iran fariborz keyhanfar department of pharmacology, faculty of medicine, iran university of medical sciences, tehran, iran. shohreh mohebbi department of medicinal chemistry, school of pharmacy, zanjan university of medical sciences, zanjan, iran. maryam noubarani department of pharmacology and toxicology, faculty of pharmacy, zanjan university of medical sciences, zanjan, iran.

in previous studies, mebudipine, a dihydropyridine calcium channel blocker, showed a considerable potential to be used in cardiovascular diseases. the aim of the current study was to develop a valid method using reversed-phase high performance liquid chromatography coupled with electrospray ionization mass spectrometry to assay mebudipine in the human plasma. separation was achieved on a zorbax...

2016
Liangliang Liu Aiping Xiao Defang Li

In this study, centrifugal ultrafiltration coupled with high performance liquid chromatographymass spectrometry was utilized to screen and identify xanthine oxidase inhibitors from Puerariae flos extract. The experimental conditions of centrifugal ultrafiltration including xanthine oxidase concentration, incubation time, pH and temperature were optimized. At the optimum condition (xanthine oxid...

Journal: :iranian journal of analytical chemistry 2014
soleyman bahar bahare babamiri

in this work, a procedure for preconcentration of cobalt using dispersive liquid–liquid microextraction (dllme) with the reagent 1-nitroso 2-naphtol as complexing reagent was developed. at ph 4, co(ii) was complexed with 1-nitroso 2-naphtol and extracted into the fine droplets formed when mixing chloroform (extraction solvent), ethanol (disperser solvent) and the sample solution. after extracti...

Journal: :iranian journal of analytical chemistry 2015
soleyman bahar

in this work, a procedure for preconcentration of silver using dispersive liquid–liquid microextraction with the reagent dithizone as complexing reagent was developed. at ph 2, silver ions are complexed with dithizone and extracted into the fine droplets formed when mixing carbon tetrachloride (extraction solvent), ethanol (disperser solvent) and the sample solution. after extraction, the phase...

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