Results 31 to 40 of about 80,827 (161)

Enantioselective Michael Addition of Aldehydes to Maleimides Organocatalyzed by a Chiral Primary Amine-Salicylamide

open access: yesMolecules, 2018
A primary amine-salicylamide derived from chiral trans-cyclohexane-1,2-diamine was used as an organocatalyst for the enantioselective conjugate addition of aldehydes, mainly α,α-disubstituted to N-substituted maleimides.
Alejandro Torregrosa-Chinillach   +5 more
doaj   +1 more source

Analytical methods and experimental quality in studies targeting carbonyls in electronic cigarette aerosols

open access: yesFrontiers in Chemistry
We provide an extensive review of 14 studies (11 independent and three industry-funded) on emissions generated by Electronic Cigarettes (ECs), specifically focusing on the evaluation of carbonyls present in these emissions and emphasizing a meticulous ...
Roberto A. Sussman   +4 more
doaj   +1 more source

Oxidation of Aldehydes Used as Food Additives by Peroxynitrite

open access: yesAntioxidants, 2023
Benzaldehyde and its derivatives are used as food supplements. These substances can be used mainly as flavorings or as antioxidants. Besides, peroxynitrite, an oxidizing agent, could be formed in canned food. Both species could react between them.
Clara I. Alcolado   +5 more
doaj   +1 more source

Exhaled Aldehydes as Biomarkers for Lung Diseases: A Narrative Review

open access: yesMolecules, 2022
Breath analysis provides great potential as a fast and non-invasive diagnostic tool for several diseases. Straight-chain aliphatic aldehydes were repeatedly detected in the breath of patients suffering from lung diseases using a variety of methods, such ...
Maximilian Alexander Floss   +5 more
doaj   +1 more source

Molecular Response to Toxic Diatom-Derived Aldehydes in the Sea Urchin Paracentrotus lividus

open access: yesMarine Drugs, 2014
Diatoms are dominant photosynthetic organisms in the world’s oceans and represent a major food source for zooplankton and benthic filter-feeders. However, their beneficial role in sustaining marine food webs has been challenged after the discovery that ...
Stefano Varrella   +5 more
doaj   +1 more source

The Regular Interaction Pattern among Odorants of the Same Type and Its Application in Odor Intensity Assessment

open access: yesSensors, 2017
The olfactory evaluation function (e.g., odor intensity rating) of e-nose is always one of the most challenging issues in researches about odor pollution monitoring.
Luchun Yan   +4 more
doaj   +1 more source

3-(3-Hydroxypropyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxaldehyde Methyl Hemiacetal

open access: yesMolbank, 2021
The synthesis of 3-(3-hydroxypropyl)-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxaldehyde as a stable methyl hemiacetal through a convenient 3-step procedure is reported.
Massimiliano Cordaro
doaj   +1 more source

Engineering an Alcohol-Forming Fatty Acyl-CoA Reductase for Aldehyde and Hydrocarbon Biosynthesis in Saccharomyces cerevisiae

open access: yesFrontiers in Bioengineering and Biotechnology, 2020
Aldehydes are a class of highly versatile chemicals that can undergo a wide range of chemical reactions and are in high demand as starting materials for chemical manufacturing.
Jee Loon Foo   +10 more
doaj   +1 more source

Limited Antioxidant Effect of Rosemary in Lipid Oxidation of Pan-Fried Salmon

open access: yesBiomolecules, 2019
Consumption of omega-3 polyunsaturated fatty acids (n-3 PUFAs) rich fatty fish is known to provide an array of health benefits. However, high temperature in food preparation, such as pan-frying, potentially degrades eicosapentaenoic acid (EPA) and ...
Kin Sum Leung   +5 more
doaj   +1 more source

Reductive amination with zinc powder in aqueous media

open access: yesBeilstein Journal of Organic Chemistry, 2011
Zinc powder in aqueous alkaline media was employed to perform reductive amination of aldehydes with primary amines. The corresponding secondary amines were obtained in good yields along with minor amounts of hydrodimerization byproducts.
Giovanni B. Giovenzana   +3 more
doaj   +1 more source

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