Results 11 to 20 of about 13,234 (272)

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   +4 more sources

Ultrasonic Accelerated Efficient Synthesis of (1H-tetrazole-5-yl) Pyrazines Catalyzed by MgFe2O4 Nanoparticles as a Reusable Heterogeneous Catalyst [PDF]

open access: yesJournal of Nanostructures, 2018
An efficient synthesis of (1H-tetrazole-5-yl) pyrazines is achieved by one pot multi- component coupling reaction of α-dicarbonyl compounds, 2,3-diaminomaleonitrile and sodium azide using MgFe2O4 nanoparticles as a robust catalyst under ultrasonic ...
Javad Safaei-Ghomi   +2 more
doaj   +1 more source

An overview of the physical and biochemical transformation of cocoa seeds to beans and to chocolate: Flavor formation [PDF]

open access: yes, 2020
Source Agritrop Cirad (https://agritrop.cirad.fr/594161/)International audienceChocolate is a widely consumed product worldwide due to its exquisite flavor, which comes from the unique and fascinating cocoa flavor.
Escobar Parra, Sebastian   +3 more
core   +1 more source

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

Volatile compound diversity and conserved alarm behaviour in Triatoma dimidiata [PDF]

open access: yes, 2015
Background: Triatoma dimidiata (Latreille) is a key vector complex of Trypanosoma cruzi, etiologic agent of Chagas disease, as it spans North, Central, and South America.
Cruz López, Leopoldo   +4 more
core   +1 more source

The odour of white bread [PDF]

open access: yes, 1973
Volatile constituents of white bread were investigated. Different methods were used for isolating and concentrating components to avoid artefacts as far as possible. Especially good was enlarged vapour analysis.
Mulders, E.J.
core   +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

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