Results 21 to 30 of about 4,103,456 (328)

Coal mine spontaneous combustion fire monitoring system based on micro gas chromatograph and positive pressure gas delivery technology

open access: yesMeikuang Anquan, 2022
With the increase of coal mining intensity in mines, the tendency of coal to spontaneous combustion increases gradually. Due to the existing coal mine spontaneous combustion fire beam tube chromatography monitoring system has the problems of easy ...
LI Tuanjie   +6 more
doaj   +1 more source

Detection of Urethane in Non-alcoholic Fermented Food [PDF]

open access: yesE3S Web of Conferences, 2020
Among fermented foods, urethane often appears, which is a “2A” grade carcinogen. There are many types of fermented foods in my country, and the detection methods are not uniform enough, and no specific urethane detection standards have been formed.
Lihua Zhang
doaj   +1 more source

SIMPLE AND RAPID GAS-CHROMATOGRAPHIC METHOD FOR QUANTITATION OF TOTAL AND FREE VALPROIC ACID IN HUMAN SERUM [PDF]

open access: yesActa Medica Iranica, 2007
Valproic acid (VPA) is one of the mostly used antiepileptic drugs that may have some side effects so, it is highly recommended to evaluate its serum concentrations.
H. R. Falahat-Pisheh   +1 more
doaj   +1 more source

Analysis of Lambic Beer Volatiles during Aging Using Gas Chromatography–Mass Spectrometry (GCMS) and Gas Chromatography–Olfactometry (GCO)

open access: yesBeverages, 2020
Lambic beer is produced using spontaneous fermentation. Gueuze is a style of lambic beer that blends “young” (1 year old) and “aged” (2+ years old) beers.
Katherine Witrick   +2 more
doaj   +1 more source

PLANT PHYSIOLOGICAL PERFORMANCE AND SEED CHEMICAL COMPOSITION OF SOYBEAN UNDER DIFFERENT SPATIAL ARRANGEMENT

open access: yesRevista de Agricultura Neotropical, 2023
Few studies present interactions among plant physiological and seed chemical composition of soybean cultivates under different arrangements. Therefore, this study seeks to understand this relationship between space occupation and product quality.
Danubia Aparecida Costa Nobre   +5 more
doaj   +1 more source

Analysis and identification of diamondoids by different mass spectrometry techniques

open access: yesShiyou shiyan dizhi, 2020
Diamondoids have attracted extensive attention from researchers because of their important application value in oil and gas exploration. Since diamondoids have complex molecular structures and a large number of isomers, the identification of certain ...
Ling HUANG   +6 more
doaj   +1 more source

Basic Gas Chromatography

open access: yes, 2019
PREFACE TO THE SECOND EDITION. PREFACE. ACKNOWLEDGMENTS. 1 INTRODUCTION. A Brief History. Definitions. Overview: Advantages and Disadvantages. Instrumentation. References. 2 INSTRUMENT OVERVIEW. Carrier Gas. Flow Control and Measurement.
H. Mcnair, James M. Miller
semanticscholar   +1 more source

Flow Rates in Liquid Chromatography, Gas Chromatography and Supercritical Fluid Chromatography: A Tool for Optimization

open access: yesJournal of Open Research Software, 2016
This paper aimed to develop a standalone application for optimizing flow rates in liquid chromatography (LC), gas chromatography (GC) and supercritical fluid chromatography (SFC). To do so, Van Deemter’s equation, Knox’ equation and Golay’s equation were
Joris Meurs
doaj   +1 more source

Blood-Based Lipidomics Approach to Evaluate Biomarkers Associated With Response to Olanzapine, Risperidone, and Quetiapine Treatment in Schizophrenia Patients

open access: yesFrontiers in Psychiatry, 2018
This is the first study to identify lipidomic markers in plasma associated with response of acutely ill schizophrenia patients in response to specific antipsychotic treatments.
Adriano Aquino   +10 more
doaj   +1 more source

La chromatographie en phase gazeuse et l’étude des goudrons

open access: yesCHIMIA, 1961
Analysis by gas chromatography of the heavy fractions of coal tar calls for working temperatures up to 400 °C. A method is described to execute gas chromatography at such high temperatures and the interpretation of the diagrams obtained is discussed. By
P. Ferrero
doaj   +1 more source

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