نتایج جستجو برای: derivatization

تعداد نتایج: 3729  

Journal: :Forensic science international 2013
Dariusz Zuba Karolina Sekuła Agnieszka Buczek

This publication reports analytical properties of a new hallucinogenic substance identified in blotter papers seized from the drug market, namely 25C-NBOMe [2-(4-chloro-2,5-dimethoxyphenyl)-N-(2-methoxybenzyl)ethanamine]. The identification was based on results of comprehensive study including several analytical methods, i.e., GC-EI-MS (without derivatization and after derivatization with TFAA)...

2015
Qing-Yun Cheng Jun Xiong Wei Huang Qin Ma Weimin Ci Yu-Qi Feng Bi-Feng Yuan

2-hydroxyglutarate (2HG) is a potent competitor of α-ketoglutarate (α-KG) and can inhibit multiple α-KG dependent dioxygenases that function on the epigenetic modifications. The accumulation of 2HG contributes to elevated risk of malignant tumors. 2HG carries an asymmetric carbon atom in its carbon backbone and differentiation between D-2-hydroxyglutarate (D-2HG) and L-2-hydroxyglutarate (L-2HG...

Journal: :The Journal of Physical Chemistry Letters 2018

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1387

چکیده ندارد.

Journal: :int. j. lignocellulosic products 2014
s.a. mirshokraie v. haji aghaei t. partovi s. noroozi

in this research, the characteristics of cmp dioxane lignin (hardwood origin) and soda bagasse lignin (ethanol soluble fraction) and dioxane lignin of bagasse were studied using gel permeation chromatography, gas chromatography-mass spectrometry and 13c nmr spectroscopy and dfrc degradation procedure. the results indicated that the main structural units in lignins are phenyl propane skeletons b...

Journal: :Chromatography 2023

A sophisticated pretreatment method that combines solid-phase dispersive extraction (SPDE) and fluorescence derivatization using immunoaffinity (IA) gel was developed to analyze aflatoxin M1 (AFM1) in cheese by liquid chromatography. Cheese samples were homogenized adding acetonitrile/methanol/purified water mixture (6:1:3, v/v/v), followed purification SPDE. Trifluoroacetic acid added the IA f...

Journal: :International Journal of Ayurvedic Medicine 2023

Belief on the therapeutic values of herbal medicine is in increasing trend and consumption traditional also upward trend. The quality control assurance these medicines a prime criterion for any drug manufacturer. Venpucani ilakam (VPI) classical poly Siddha under category Ilakam (Legiyam Ayurveda). This combination 18 ingredients plants animal origins. An attempt was made to prepare with authen...

Journal: :Environmental Systems Research 2021

Abstract Biofilm communities on intertidal mudflats are recognized as major producers of nutrients, especially fatty acids. The rising threats posed by both climatic and anthropogenic stressors increase the necessity understanding conserving these communities. Shorebirds provide a proxy for studying complex ecology biofilm because their heavy reliance acids from diatomaceous successful long-dis...

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