Results 21 to 30 of about 52,498 (273)

Rapid determination of simple polyphenols in grapes by HPLC using a monolithic column [PDF]

open access: yes, 2010
The development of a rapid, reliable and reproducible LC method for the determination and quantification of 13 polyphenols (gallic acid, protocatechuic aldehyde, gentisic acid, catechin, vanillinic acid, caffeic acid, vanillin, epicatechin ...
Brigui, Jamal   +4 more
core   +2 more sources

Highly Active and Specific Tyrosine Ammonia-Lyases from Diverse Origins Enable Enhanced Production of Aromatic Compounds in Bacteria and Saccharomyces cerevisiae [PDF]

open access: yes, 2015
Phenylalanine and tyrosine ammonia-lyases form cinnamic acid and p-coumaric acid, which are precursors of a wide range of aromatic compounds of biotechnological interest.
Borodina, Irina   +8 more
core   +1 more source

Ethylene-dependent activity of phenylalanine ammonia-lyase and lignin formation in cucumber roots exposed to phenolic allelochemicals

open access: yesActa Societatis Botanicorum Poloniae, 2014
Seedling roots of cucumber were subjected to allelochemical stress by treating them with 0.1 mM solutions of ferulic, p-coumaric, p-hydroxybenzoic and vanillic acids. In the experiment the influence of derivatives of cinnamic acid (ferulic and p-coumaric
Barbara Politycka
doaj   +1 more source

COSY catalyses trans-cis isomerization and lactonization in the biosynthesis of coumarins [PDF]

open access: yes, 2019
Coumarins, also known as 1,2-benzopyrones, comprise a large class of secondary metabolites that are ubiquitously found throughout the plant kingdom.
Boerjan, Wout   +15 more
core   +1 more source

Sporopollenin, a natural copolymer, is robust under high hydrostatic pressure [PDF]

open access: yes, 2016
Lycopodium sporopollenin, a natural copolymer, shows exceptional stability under high hydrostatic pressures (10 GPa) as determined by in situ high pressure synchrotron source FTIR spectroscopy.
Barsoum R. G. S.   +6 more
core   +1 more source

Merging Biocatalysis and Chemocatalysis in Flow: State‐of‐the‐Art and Future Directions for Sustainable Synthesis

open access: yesAngewandte Chemie, EarlyView.
This review highlights recent advances in integrating biocatalysis and chemocatalysis in continuous flow to create streamlined, sustainable processes. It examines chemo‐enzymatic cascades combining at least one enzymatic and one chemical step, discusses challenges such as enzyme immobilization, leaching, and reactor clogging, and presents solutions ...
Petros Siasiaridis   +2 more
wiley   +2 more sources

Screening the effect of four ultrasound-assisted extraction parameters on hesperidin and phenolic acid content of aqueous citrus pomace extracts [PDF]

open access: yes, 2018
Polyphenols of citrus by-products, due to their antioxidant and antimicrobial activities, could be valorized by pharmaceutical and food industries, adding a value to the citrus processing companies.
Bowyer, Michael C.   +6 more
core   +2 more sources

Hydroxylation and Glycosylation of Phenylpropanoids by Cultured Cells of

open access: yesNatural Product Communications, 2016
Hydroxylation and glycosylation of cinnamic acid, p -coumaric acid, caffeic acid, and ferulic acid were investigated using cultured plant cells of Phytolacca americana as biocatalysts. Regioselective hydroxylation at the 4-position of cinnamic acid and 3-
Kei Shimoda   +4 more
doaj   +1 more source

Evaluation of Antioxidant Activity, Total Flavonoids, Tannins and Phenolic Compounds in Psychotria Leaf Extracts

open access: yesAntioxidants, 2014
The antioxidant activity of Psychotria carthagenensis, P. leiocarpa, P. capillacea and P. deflexa (Rubiaceae) extracts were investigated, and the concentrations of total phenolics, flavonoids, condensed tannins and flavonols were determined. The chemical
Anelise Samara Nazari Formagio   +5 more
doaj   +1 more source

Biotransformation of caffeoyl quinic acids from green coffee extracts by Lactobacillus johnsonii NCC 533 [PDF]

open access: yes, 2013
Acknowledgements The authors are grateful to Nicole Page-Zoerkler and Olivier Mauroux for their technical assistant. We thank David Pridmore and Kimo Makkinen for critical reading of this manuscript.Peer reviewedPublisher ...
Bel-Rhlid, Rachid   +4 more
core   +2 more sources

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