Article Type: Short communication Coffee is a favorite drink in the world which has been consumed for centuries. Coffee has both positive and negative effects on human health, that is why scientists need to show concern for the volume of coffee that should be consumed daily. Coffee contains phytochemicals known as phenolic acids and are influenced by temperature. This study was aimed at knowing...

objectives: leaves and flowers ofelaeagnus angustifolia contain phenolic and flavonoid compounds. these compounds have antioxidant properties that protect cells from oxidative damage. the aim of this study was to determine and analyze total phenolic and flavonoid content of leaves and flowers in two e. angustifolia variants using different solvents (ethanol and methanol). materials and methods:...

1. Abstract 2. Introduction 3. Phytoalexins and cancer prevention mechanisms 3.1. Antimicrobial activity 3.2. Proliferation 3.2.1. Cruciferous phytoalexins 3.2.2. Deoxyanthocyanidins 3.2.3. Glycoalkaloids 3.2.4. Stilbenes 3.2.5. Phenolic coumarins and garlic phytoalexins 3.3. Apoptosis 3.3.1. Stilbenes 3.3.2. Phenolic coumarins 3.3.3. Glycoalkaloids 3.3.4. Garlic phytoalexins 3.3.5. Di-terpenes...

HPLC and gel permeation chromatographic (GPC) characterization of complex phenol-formaldehyde resins is described. Reversed-phase HPLC fingerprints the phenolic monomers, dimers and some oligomers. The molecular masses of these phenolic compounds were determined using an ion trap mass spectrometer. GPC analyzes tetrahydrofuran-soluble phenolic polymers beyond HPLC capability. The molecular mass...

Conventional carbon fiber reinforced phenolic resins are widely used to prepare carbon/carbon composites due to their high carbon yield. Property enhancement of carbon fabric/phenolic composites is possible through carbon nanomaterial dispersion in the matrix. The effect of carbon nanofiber dispersion in phenolic resins/carbon fabric composites was investigated. The dispersion efficiency in dif...

About 600 species of Passiflora are described around the world, which 120 native to Brazil. In present work, phytochemical compounds were analyzed by high-performance liquid chromatography, and antioxidant activities (AOX) measured in pulp P. edulis cincinnata species. The presented a higher bioactive content AOX when compared cincinnata. Citric malic acids main organic found. principal compone...

Cocoa beans contain polyphenolic compounds/phenolic include catechin, epicatechin, anthocyanin, proanthocyanidin, phenolic acids, condensed tannins, alkaloids, teroid/terpenoids, flavonoids-other flavonoids, and some minor components. Polyphenol group compounds have antibacterial anti-inflammatory effects. This research aims to determine the physico-chemical properties effects of toothpaste con...

Phenolic compounds are important inhibitors of the microorganisms used in the Acetone-Butanol-Ethanol (ABE) fermentation. The degradation of phenolic compounds in a wood pre-hydrolysate, a potential substrate for the production of ABE, was studied in this article. First, physicochemical methods for detoxification such as nanofiltration and flocculation were applied and the best combination was ...

The effect of two anti-fungal treatments (metrafenone and boscalid + kresoxim-methyl) on the color and phenolic profile of Tempranillo and Graciano red wines has been studied. To evaluate possible modifications in color and phenolic composition of wines, control and wines elaborated with treated grapes under good agricultural practices were analyzed. Color was assessed by Glories and CIELab par...

We report a flexible de novo synthesis of phenolic dihydroxanthene fluorophores. The synthesis relies on a one-pot formation of an aldehyde intermediate which can be diversified in 60-70% overall yield, providing an efficient access to this family of near-infrared emitting fluorophores.