Results 11 to 20 of about 7,564 (224)

Tight-Binding Approach to Pyrazine-Mediated Superexchange in Copper–Pyrazine Antiferromagnets [PDF]

open access: yesInorganic Chemistry, 2021
We investigate the cause of spatial superexchange anisotropy in a family of copper-based, quasi-two-dimensional materials with very similar geometries. The compounds in this family differ mainly in their inter-layer separation but they have very different magnetic interactions, even within the basal plane.
E. P. Kenny, A. C. Jacko, B. J. Powell
openaire   +5 more sources

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

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

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

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

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

Effect of defatted soybean flour on the flavour of extruded mixtures with wheat flour

open access: yesCzech Journal of Food Sciences, 2002
Mixtures of wheat semolina, 5% glucose and 0-30% defatted soybean flour were used for the preparation of extruded samples using a pilot plant single screw extruder, maximum temperature being 140°C.
J. Pokorný   +3 more
doaj   +1 more source

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