Effect of different polarity solvents on total phenols and flavonoids content, and In-vitro antioxidant properties of flowers extract from Aurea Helianthus [PDF]
arXiv, 2019 The total phenols and flavonoids content of different polar solvent extracts from Aurea Helianthus flowers, and their antioxidant activity were determined. The ethanol extract of Aurea Helianthus flowers were suspended in water and fractionated using different polar solvents; hexane, chloroform, ethyl acetate, butanol and water.
arxiv
Phenolic compounds and antioxidant activity of Brazil nut (Bertholletia excelsa)
Journal of Functional Foods, 2010 Brazil nuts were shelled and separated as kernel and brown skin; whole nuts were also used. Soluble phenolics from each portion as well as the whole nut were extracted using 70% acetone under reflux conditions. Insoluble-bound phenolics were subsequently
Jenny A. John, Fereidoon Shahidi
doaj
Insoluble-Bound Phenolics in Food
Molecules, 2016 This contribution provides a review of the topic of insoluble-bound phenolics, especially their localization, synthesis, transfer and formation in plant cells, as well as their metabolism in the human digestive system and corresponding bioactivities.
Fereidoon Shahidi, JuDong Yeo
doaj +1 more source
Modeling the Effects of Velocity, Spin, Frictional Coefficient, and Impact Angle on Deflection Angle in Near-elastic Collisions of Phenolic Resin Spheres [PDF]
arXiv, 2004 A simple model is outlined to describe the collision of cast phenol-formaldehyde resin spheres such as the balls used in the parlor game of pocket billiards, based in part on the famous analysis of elastic collisions developed by Heinrich Hertz over 100 years ago. The analysis treats the normal and tangential components of the initial sphere's velocity
arxiv
Composition of Free and Bound Phenolics from Paeonia suffruticosa Andr. Flowers and Their Antioxidant and α-Glucosidase inhibitory Activities [PDF]
Shipin KexueFree phenolics (FP), esterified phenolics (EP), glycosidized phenolics (GP) and insoluble bound phenolics (IBP) were successively extracted from two varieties of peony flowers: Danfeng and Xiangyu.
CHEN Ling, WANG Xuefang, LI Zhining, ZHANG Lipan, LI Xiao, NING Erjuan
doaj +1 more source
THz-Raman Identification of labile products in the system "phenol-semiquinone-quinone" [PDF]
arXiv, 2016 The paper presents the results of SERS studies of the dynamic behavior of "phenol-semiquinone-quinone" system. This system is a key part of chemiluminescent sensors for reactive oxygen species. The dynamics of the system seems to be very important in the processes that determine the secondary metabolism at the cellular level in molecular biology.
arxiv
Increased atmospheric CO2 combined with local climatic variation affects phenolics and spider mite populations in coffee trees [PDF]
Anais da Academia Brasileira de CiênciasModelling studies on climate change predict continuous increases in atmospheric carbon dioxide concentration [CO2] and increase in temperature. This may alter carbon-based phytochemicals such phenolics and modify plant interactions with herbivorous.
EUNICE R. BATISTA +5 more
doaj +2 more sources
Simple phenol and phenolic compounds in food flavor
C R C Critical Reviews in Food Science and Nutrition, 1978 Simple phenol and phenolic compounds occur in a vast portion of our diet. This review attempts to discuss their occurrences relative to our food supply. In addition, their chemical, nutritional, and sensory properties are explored, as well as methods for their isolation, identification, and quantitation.
Joseph A. Maga, Ira Katz
openaire +3 more sources
FTIR and GCMS analysis of epoxy resin decomposition products feeding the flame during UL 94 standard flammability test. Application to the understanding of the blowing-out effect in epoxy/polyhedral silsesquioxane formulations [PDF]
arXiv, 2018 A novel method was developed for the sampling of volatiles produces by polymer decomposition during UL94 standard flammability tests, allowing to collect, separate and analyze the precise composition of the fuel mixture feeding the flame in the real flammability tests.
arxiv
Microbial degradation of phenol and phenolic derivatives
Engineering in Life Sciences, 2013 Phenol and its derivatives are one of the largest groups of environmental pollutants due to their presence in many industrial effluents and broad application as antibacterial and antifungal agents. A number of microbial species possess enzyme systems that are applicable for the decomposition of various aliphatic and aromatic toxic compounds.
Zlatka Alexieva +2 more
openaire +2 more sources