Results 61 to 70 of about 8,099 (198)
Plant Biology, Volume 28, Issue 2, Page 520-534, March 2026.Growth environment strongly influences green coffee bean biochemistry, linking phytochemical composition to adaptation under abiotic stress. Abstract This study explores how bioactive compounds in green coffee beans (Coffea arabica L.) vary across different geographic regions, addressing the key question of how environmental factors shape coffee ...
I. Pettazzoni +6 more
wiley +1 more source
Graphene Oxide: A Smart (Starting) Material for Natural Methylxanthines Adsorption and Detection
Molecules, 2019 Natural methylxanthines, caffeine, theophylline and theobromine, are widespread biologically active alkaloids in human nutrition, found mainly in beverages (coffee, tea, cocoa, energy drinks, etc.). Their detection is thus of extreme importance, and many
Rita Petrucci +6 more
doaj +1 more source
International Journal of Molecular Sciences, 2020 Methylxanthines are a group of substances derived from the purine base xanthine with a methyl group at the nitrogen on position 3 and different residues at the nitrogen on position 1 and 7.
Daniel Janitschke +6 more
semanticscholar +1 more source
A Riboflavin‐Derived Flavinium Salt Mediates Chemoselective Methylation Reactions
Chemistry – A European Journal, Volume 32, Issue 5, 2 February 2026.A two‐component methylation protocol was developed, where the active flavin mediator can be recycled in a single step. Crystallographic data and NMR spectroscopy support the mechanistic proposal, while chemoselective methylation was observed for a broad range of biologically relevant substrates. ABSTRACT Selective methylation is among the most relevant
Tim Langschwager +3 more
wiley +1 more source
Analysis of operating variables for Yerba mate leaves supercritical carbon dioxide extraction [PDF]
Chemical Industry and Chemical Engineering Quarterly, 2018 Given the increasing demand for potassium in Brazil, the mining and use of carnallite is becoming increasingly important, because the current source of potassium, sylvinite, is being depleted and there is a risk of shortages.
Teofilović Branislava +4 more
doaj +1 more source
Chemistry – An Asian Journal, Volume 21, Issue 3, 12 February 2026.Methamphetamine was the only illicit drug consistently detected (consumption at 17.0 ± 5.1 mg/day/1000people). High levels of its precursors, ephedrine, and pseudoephedrine were likely from legal medicines, although there is a high risk of diversion.
Quyen T. T. Do +4 more
wiley +1 more source
eFood, Volume 7, Issue 1, February 2026.From farm to pharma, this review details the engineering of quality in medicinal plants through a science‐driven approach: it first elucidates how genetic and environmental factors inscribe the plant's phytochemical and phytopharmacological profile before harvest, and then dissects the postharvest techniques and technologies—chemical and thermal pre ...
Elyas Aryakia
wiley +1 more source
Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2014 The aim of the work is thesynthesis and research of physical and chemical properties of earlier undescribed 1,8-disubstituted of theobromine, which are potential biologically active compounds.
D. G. Ivanchenko +3 more
doaj +1 more source
Stress and Health, Volume 42, Issue 1, February 2026.ABSTRACT To assess available evidence on the association between anxiety and caffeine consumption in healthy individuals. A high‐sensitivity electronic search was performed, as recommended by the Cochrane Handbook, which underwent peer review according to the PRESS Guide, in March 2021 in the following databases: Cochrane Library, MEDLINE via PUBMED ...
Alef Oliveira do Nascimento +3 more
wiley +1 more source
Genetic variation of phytochemical compounds in progenies of Ilex paraguariensis St. Hil. [PDF]
Crop Breeding and Applied Biotechnology, 2009 Mate (Ilex paraguariensis St. Hil) contains phytochemical compounds capable of preventing a number of healthproblems. Knowledge on the genetic contribution to the variability in these compounds can help to obtain mate progenies withhigher levels thereof ...
Euclides Lara Cardozo Junior +3 more
doaj