A methodology based on a solid phase extraction (SPE) was optimized for the recovery of phenolic compounds from spent fermentation broth generated Biofene® (trans-?-farnesene) production. For this purpose, two resins (XAD-2 and HP-20) three desorption solutions (water, 50/50 ethanol/water, ethanol) were tested. The most efficient resin revealed to be HP-20, using ethanol as solution, reaching a...

Heliotropium sclerocarpum Phil. (Heliotropiaceae) is a resinous bush that grows in the Atacama of northern Chile. The chemical composition of its resinous exudate was analyzed for the first time. One aromatic geranyl derivative: filifolinol (1), one flavanone: naringenin (2) and a new type of 3-oxo-2-arylbenzofuran derivative 3 were isolated and their structures were determined. The antioxidant...

Plywood manufactured from thin veneer sheets of different species is one of the most traditional structural composite panels. The objective of this study was to produce experimental plywood panels using a temperature of 100 °C, which is 10 to 30% lower than typical press temperature of plywood manufacture. It was determined that shear strength characteristics of the samples were not adversely i...

A bio-oil-based epoxy (BOE) resin was synthesized using phenolic compounds from beechwood pyrolysis oil. These were separated crude oil by coupling two methods: fractional condensation and water extraction. The chemical structure of the BOE characterized NMR FTIR analyses. used as a curing agent bio-oil glyoxal novolac (BOG) to gradually replace bisphenol diglycidyl ether (DGEBA). thermal prope...

In vitro studies have shown phenolics in olive oil to be strong radical scavengers. The absorption and elimination of two radiolabeled phenolic constituents of olive oil, hydroxytyrosol and tyrosol were studied in vivo using rats. Compounds were administered intravenously (in saline) and orally (in oiland water-based solutions). For both compounds, the intravenously and orally administered oil-...

Chemoprevention has recently gained a new dimension due to the possibility of studying the mechanisms of action of chemopreventive agents at the molecular level. Many compounds have been proved to inhibit early stages of carcinogenesis in experimental models. These compounds include both recognized drugs (such as tamoxifen and nonsteroidal anti-inflammatory drugs) and natural constituents of ed...

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...

The aim of this work is to investigate the antibacterial effect of phenolic compound combinations and total polyphenols of Argentinean red wine varieties against Escherichia coli ATCC 35218 and Listeria monocytogenes using commercial fish meat as model food. Rutin-quercetin combination and three wine varieties (Cabernet Sauvignon, Malbec and Merlot) caused cellular death of both bacteria on fis...

The phenolic amines include substances such as epinephrine, norepinephrine, and serotonin, whose physiological importance has been known for many years, and some other amines of recent interest whose biological significance is less clear; these include dopamine (1) and octopamine (2). It is probable that still others exist and have a physiological function in some tissues of the body. The conce...