The phrase "a compounds" is not correct in written English.
It should be "a compound" when referring to a single chemical substance or a single unit of a compound.
Example: "Water is a compound made up of hydrogen and oxygen atoms."
Alternatives: "a chemical compound" or "a single compound".
From the analysis of various inhibitors (1 7), we conducted that due to lack of carbonyl moiety and a double bond in ring "A", compounds 1 3 were not able to productively engage with the enzyme, the outcome was well correlated with experimental results.
Beta-carotene, a well-known carotenoid, is one of more than 600 carotenoids that are considered "provitamin A" compounds that the body can convert to retinol, an active form of vitamin A. Omega-3 fatty acids are another important nutrient to include in your diet in the fight against inflammation.
Both live prey were able to absorb and metabolize the vitamin A compounds administered through the emulsion, according to the results regarding retinol and retinoic acid content although the levels were higher in the rotifers than in the nauplii.
Methylobacterium extorquens AM1, a model strain of methylotrophic cell factories using methanol as carbon source, is of interest because it produces abundant coenzyme A compounds capable of directing to synthesis of different useful compounds from methanol.
An intense long range charge-transfer has been observed in these D-π-spacer conjugation – A compounds where the degree of the intramolecular charge transfer from the donor (hexamolybdate pendant) to the acceptor (end phenyl ring bearing NO2 moiety) has been enhanced through π-spacers which might be responsible for the large NLO responses.
a Compounds with biological activities used in pharmacology.
All these D-A compounds displayed blue emission (443 487 nm) both in solution and neat film.
The bioactive assay results showed that the type-B compounds exhibited highly improved inhibitory activity against the AHAS enzyme and the tested plants comparing to type-A compounds.
Three star-shaped D-π-A compounds with a 1,3,5-triazine core and N-aryl chromophore (3,6-di-tert-butylcarbazole, phenoxazine and phenothiazine) substituted fluorene arms were designed and synthesized.
Owing to the different push-pull electronic effects of substituents on the coumarin moiety, TC and TF, acting as the D-A compounds, showed different HOMO-LUMO gaps and a variable red-shifted emission in their solid-state, substantiating the possibility to effectively tune the photophysical properties of these bichromophores by rational molecular design.
Donor-π-conjugate-electron acceptor (D-π-A) compounds are characterized by having intramolecular charge transfer (ICT) character.
