The qualitative and quantitative composition of the main aromatic and polyphenolic constituents of infusion from Chamaemelum nobile flowers was examined. The camomile tea contained a large amount of polyphenolic compounds (340 mg/l), the most important being chamaemeloside (155 mg/l). Only traces of essential oil were recovered in tea (7 mg/l).
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http://dx.doi.org/10.1016/j.fitote.2003.07.007 | DOI Listing |
Water Res
January 2025
Yellow River Laboratory of Shanxi Province, Shanxi University, Taiyuan, 030006, PR China; The Key Laboratory of Water and Sediment Sciences (Ministry of Education), College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, PR China. Electronic address:
High-temperature wastewaters can themselves activate peroxydisulfate (PDS) to remove aromatic contaminants via polymerization. This, however, may result in an insufficient carbon source for denitrification during biochemical treatment, and the formed polymers, without a proper reuse method, will be costly to handle as hazardous waste. This study demonstrates that the addition of NaOH can suppress the polymerization of aromatic contaminants, which is observed not only in simulated wastewater but also in actual coking wastewater (ACW).
View Article and Find Full Text PDFFood Chem
December 2024
Department of Food and Bioproduct Sciences, University of Saskatchewan, Saskatoon S7N 5A8, Saskatchewan, Canada. Electronic address:
A soluble fraction of faba bean protein was conjugated with tannic acid via the free-radical grafting method using a mixture of ascorbic acid and hydrogen peroxide. Surface plasmon resonance showed a strong bonding between them, while the free amino and thiol group measurements indicated tannic acid's bonding with the amino groups and cysteine residues on the proteins. Structural analysis using intrinsic fluorescence and surface hydrophobicity demonstrated tannic acid's interaction with the aromatic and hydrophobic amino acids of the protein.
View Article and Find Full Text PDFCurr Pharm Des
January 2025
Institute of Materials Research, Tsinghua Shenzhen International Graduate School (SIGS), Tsinghua University, Shenzhen 518055, China.
Introduction: An efficient and four-component one-pot facile synthesis of tetra-substituted imidazole is achieved by cyclo-condensation reaction of benzil with subsequent successive substitution of aromatic aldehydes, ester substituted amine and ammonium acetate via refluxing the mixture for almost two hours at 140°C.
Method: The ending point of the understudy reaction was examined by TLC after regular intervals. Synthesized 1,2,4-tetrasubstituted imidazoles were characterized by physical data and the structural features were analyzed using spectroscopic techniques such as FTIR, NMR and elemental analysis.
Int J Biol Macromol
January 2025
School of Biological and Chemical Engineering, NingboTech University, Ningbo 315100, China. Electronic address:
Theaflavins, oxidation product of tea polyphenols, have demonstrated significant inhibitory effects on α-glucosidase, which is beneficial in alleviating hyperglycemia. This study found that the inhibition of four monomers of theaflavins on α-glucosidase was related to the presence of the galloyl moiety (GM), with IC values ranging from TFDG (0.26 mg/mL) < TF3'G (0.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Peatlands store one-third of the world's soil organic carbon. Globally increased fires altered peat soil organic matter chemistry, yet the redox property and molecular dynamics of peat-dissolved organic matter (PDOM) during fires remain poorly characterized, limiting our understanding of postfire biogeochemical processes. Clarifying these dynamic changes is essential for effective peatland fire management.
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