نتایج جستجو برای: gas chromatographymass spectrometry gcms

تعداد نتایج: 326793  

2017
Muhammad Dawood Shah Urban J.A. D’Souza Mohammad Iqbal

BACKGROUND This study aims to assess the hepatoprotective potential of Commelina nudiflora against CCl4-induced hepatic injury in rats. METHOD Antioxidant activities were determined. Phytochemical analysis was performed by gas chromatography mass spectrometry (GCMS). In the in vivo study, Sprague Dawley rats were pretreated with C. nudiflora (150, 300, and 450 mg kg body weight (b.wt.)) once ...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2009
Alan M Haywood Harry J Dowsett Paul J Valdes Daniel J Lunt Jane E Francis Bruce W Sellwood

Climate predictions produced by numerical climate models, often referred to as general circulation models (GCMs), suggest that by the end of the twenty-first century global mean annual surface air temperatures will increase by 1.1-6.4 degrees C. Trace gas records from ice cores indicate that atmospheric concentrations of CO2 are already higher than at any time during the last 650000 years. In t...

2004
Zaitao Pan Raymond W. Arritt Eugene S. Takle William J. Gutowski Christopher J. Anderson Moti Segal

[1] In the last 25 years of the 20th century most major land regions experienced a summer warming trend, but the central U.S. cooled by 0.2–0.8 K. In contrast most climate projections using GCMs show warming for all continental interiors including North America. We examined this discrepancy by using a regional climate model and found a circulation-precipitation coupling under enhanced greenhous...

Journal: :asia pacific journal of medical toxicology 0
rachid el-jaoudi laboratory of pharmacology and toxicology, faculty of medicine and pharmacy, rabat, morocco luc humbert laboratory of toxicology and genopathy, center of biology and pathology, lille, france frederique grisel waters corporation, european headquarters and waters s.a.s., guyancourt, france yahya cherrah laboratory of pharmacology and toxicology, faculty of medicine and pharmacy, rabat, morocco daniel mathieu emergency department, calmette hospital, lille, france michelle lhermitte laboratory of toxicology and genopathy, center of biology and pathology, lille, france

background: cocaine poisoning is known for causing severe clinical effects such as tachycardia, hypertension, agitation and confusion. absence of clinical manifestations in cocaine poisoning is unusual. case report: a 26-year old man, known to be a cocaine addict, declared that he was forced by cocaine dealers to swallow many tablets of cocaine, six hours prior to admission to emergency departm...

Journal: :iranian journal of pharmaceutical research 0
amir jalali - amir hatamie dept of chemistry, faculty of sciences, shahid chamran universitry, ahvaz, iran tahere safarpour dept of chemistry, azad university of medical sciences, rasht, iran alireza khajeamiri dept of pharmacology and toxicology, faculty of pharmacy, shahid beheshti university of medical sciences, tehran, iran tahere safa dept of chemistry, azad university of medical sciences, rasht, iran foad buazar dept of chemistry, khoramshahr university of marine science and technology, khoramshahr, iran

in this study, a simple and reliable method by gas chromatograph–mass spectrometry (gc–ms) was developed for the fast and regular identification of 3, 4-mdma impurities in ecstasy tablets. in so doing, 8 samples of impurities were extracted by diethyl ether under alkaline condition and then analyzed by gc–ms. the results revealed high mdma levels ranging from 37.6% to 57.7%. the gc-ms method sh...

Journal: :American Journal of Applied Chemistry 2022

In today's society, the risk of cardiovascular disease is steadily rising. The fatty acid composition three local fermented food condiments (dawadawa, ogiri igbo, and okpei) purchased from different markets in Aba, Nigeria, was studied using gas chromatography mass spectrometry (GCMS) order to look for alternative natural that are absorbed body without having many health implications. profiles ...

2016
Jyoti Goutam R N Kharwar Vinod Kumar Tiwari Amrita Mishra Shweta Singh

Present work is directed toward the isolation and identification of biological active (antimicrobial) compound from metabolite extracted from endophytic fungus Emericella qaudrilineata(RS-5) (Accession number KC662361). Crude extracted from endophytic fungus Emericella qaudrilineata possessing antibacterial activity was subjected to bioassay guided fractionation in which toluene fraction exhibi...

Journal: :IEEE Access 2021

Herbs discrimination by investigating volatile compound using Gas Chromatography Mass Spectrometry (GCMS) is a common method adopted botanists and scientists. Based on this method, usually scientists would only focus the major in order to determine species of herbs. However, it difficult differentiate herbs same family group based pattern chromatography signal since they may have almost similar...

Journal: :iranian journal of public health 0
elham jahanmard fatemeh ansari mansour feizi

background: the present study was the first attempt for determination and measurement of pesticide residues in tomatoes used in salad production plants in isfahan, central iran. methods: a multiresidue method based on modified quechers (quick, easy, cheap, effective, rugged and safe) sample preparation, followed by gas chromatography mass spectrometry (gc–ms) was developed and validated for the...

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