Results 11 to 20 of about 7,183 (228)

Evaluation of Roasting Effect on Selected Green Tea Volatile Flavor Compound and Pyrazine Content by HS-SPME GC-MS

open access: yesApplied Sciences, 2021
The present study aims at the development and validation of a quali-quantitative headspace solid-phase microextraction gas chromatography–mass spectrometry (HS-SPME GC-MS) method for the analysis of odorants in different Chinese and Japanese green teas ...
Roberto Gotti   +2 more
doaj   +1 more source

Headspace Solid-Phase Microextraction Analysis of Volatile Components in Peanut Oil

open access: yesMolecules, 2021
Peanut oil is favored by consumers due to its rich nutritional value and unique flavor. This study used headspace solid-phase microextraction (HS-SPME) combined with gas chromatography (GC) and gas chromatography–mass spectrometry (GC-MS) to examine the ...
Kai-Min Yang   +4 more
doaj   +1 more source

Optimization of the production of roasted-nutty aroma by a newly isolated fungus Tolypocladium inflatum SRH81 and impact of encapsulation on its quality

open access: yesJournal of Genetic Engineering and Biotechnology, 2022
Background Pyrazines are used in food industry to impart the foods nutty-roasted flavor. However, their extraction from natural sources is difficult and expensive. At the same time, there is awareness against the chemical food additives.
Hoda Hanem Mohamed Fadel   +4 more
doaj   +1 more source

Synthesis of Chromeno[3,4-b]piperazines by an Enol-Ugi/Reduction/Cyclization Sequence

open access: yesMolecules, 2021
Keto piperazines and aminocoumarins are privileged building blocks for the construction of geometrically constrained peptides and therefore valuable structures in drug discovery.
Ana Bornadiego   +2 more
doaj   +1 more source

2-Diphenylphosphinomethyl-3-methylpyrazine

open access: yesMolbank, 2021
The lateral metalation-electrophilic trapping reaction of alkyl-substituted pyrazines has always been challenging and poorly regioselective, with the corresponding derivatives often being isolated in moderate yield.
Tiziana Boccuzzi   +6 more
doaj   +1 more source

Synthesis of Symmetrical and Unsymmetrical Pyrazines [PDF]

open access: yesThe Journal of Organic Chemistry, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Douglass F, Taber   +2 more
openaire   +3 more sources

Changes during the extrusion of semolina in mixture with sugars

open access: yesCzech Journal of Food Sciences, 2001
Wheat semolina and its mixtures with 5% glucose, fructose of sucrose were processed in a sigle screw extruder at the maximum temperature of 140°C and the processing time of 30 s.
A. Farouk Mansour   +3 more
doaj   +1 more source

High-intensity ultrasound promoted the aldol-type condensation as an alternative mean of synthesizing pyrazines in a Maillard reaction model system of D-glucose-13C6 and L-glycine

open access: yesUltrasonics Sonochemistry, 2022
This study evaluated how the generation of pyrazines was promoted by high-intensity ultrasound (HIU) in a Maillard reaction (MR) model system of glucose-glycine.
Ruyue Zhang   +7 more
doaj   +1 more source

Flavor Profile for Fusel Oil Pyrazines

open access: yesProceedings, 2019
The aim of the research was to identify the flavor profile and the sensory performance in food [...]
Catalin Bilbie   +2 more
doaj   +1 more source

Evaluation of Changes in Alkyl Pyrazines, Color and Sensory Properties of Cocoa Powder under Different Roasting Conditions [PDF]

open access: yesPizhūhish va Nuāvarī dar ̒Ulūm va Sanāyi̒-i Ghaz̠āyī, 2021
Cocoa is an important product in the world and the raw material for the production of cocoa powder, which is widely used in the chocolate and food industries. Its value and quality are related to its unique and complex flavor combinations.
Samaneh Ebrahimzadegan   +3 more
doaj   +1 more source

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