Results 61 to 70 of about 11,718 (195)

Crystal Structures of Human Pyridoxal Kinase in Complex with the Neurotoxins, Ginkgotoxin and Theophylline: Insights into Pyridoxal Kinase Inhibition [PDF]

, 2012
Several drugs and natural compounds are known to be highly neurotoxic, triggering epileptic convulsions or seizures, and causing headaches, agitations, as well as other neuronal symptoms.
Contestabile, Roberto, Danso-Danquah, Richmond, Desai, Jigar V., Di Biase, Stefano, di Salvo, Martino L., Gandhi, Amit, Ghatge, Mohini S., Musayev, Faik N., Safo, Martin A., Schirch, Verne   +9 more
core   +3 more sources

Comparative Analysis of Fungal Communities and the Key “Golden‐Flower” Fungi in Fu Brick Tea From Seven Chinese Regions and Their Effects on the Quality of Summer‐Autumn Tea

Food Frontiers, Volume 7, Issue 2, March 2026.
This study systematically investigated 52 Fu brick tea (FBT) samples collected from seven representative regions in China. High‐through put sequencing revealed that Aspergillus, Wallemia, and Candida were the predominant fungal genera across the samples.
Lisha Ran, Jinqi Zhao, Mengyao Ma, Yiqiao Zhao, Shiyu Guo, Yu Xiao, Zhonghua Liu, Jianan Huang, Kunbo Wang, Mingzhi Zhu   +9 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, Isabella Chiarotto, Leonardo Mattiello, Daniele Passeri, Marco Rossi, Giuseppe Zollo, and Marta Feroci   +6 more
doaj   +1 more source

Efficacy of Theobromine and Sodium Fluoride Solutions for Remineralization of Initial Enamel Caries Lesions

Frontiers in Dentistry, 2021
Objectives: This study investigated the efficacy of theobromine in comparison with 0.05% sodium fluoride solution for remineralization of initial enamel caries lesions (IECLs).
Farnaz Farhad, Sohrab Kazemi, Ali Bijani, Nilgoon Pasdar   +3 more
doaj   +1 more source

Pressurized liquid extraction of caffeine and catechins from green tea leaves using ethyl lactate, water and ethyl lactate + water mixtures [PDF]

, 2017
Ethyl-lactate (ethyl 2-hydroxy-propanoate) is a bio-renewable agrochemical solvent, very suitable and environmental benign for food applications, permitted by the U.S. Food and Drug Administration as pharmaceutical and food additive.
Bermejo, David Villanueva, Fornari, Tiziana, Ibáñez, Elena, Mendiola, José A., Reglero, Guillermo   +4 more
core   +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, Grujić-Letić Nevena, Kovačević Strahinja, Podunavac-Kuzmanović Sanja, Gadžurić Slobodan   +4 more
doaj   +1 more source

In vitro ion chelating, antioxidative mechanism of extracts from fruits and barks of tetrapleura tetraptera and their protective effects against fenton mediated toxicity of metal ions on liver homogenates [PDF]

, 2015
The aim of the present study was to investigate the antioxidant activity and protective potential of T. tetraptera extracts against ion toxicity. The antioxidant activity of the extracts was investigated spectrophotometrically against several radicals (1,
Biapa, P. C. N., Bravi, Marco, Moukette, B. M., Ngogang, J. Y., Njimou, J. R., Pieme, C. A., Stoller, Marco   +6 more
core   +3 more sources

Geographic provenance and environmental growing conditions as factors influencing phytochemical composition of Arabica green coffee beans

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, G. Benati, S. Monari, E. De Angelis, L. Navarini, M. Ferri, A. Tassoni   +6 more
wiley   +1 more source

Synthesis and physical-chemical properties of 8-benzylidenhydrazino-1-(4-fluorobenzyl)theobromine derivatives

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, M. I. Romanenko, E. V. Alexandrova, A. S. Korjova   +3 more
doaj   +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, Ekrem Suylu, Julian Zuber, Golo Storch   +3 more
wiley   +1 more source