phenolic compounds of wood

Phenolic antioxidants in wood smoke - CiteSeerX

1. Introduction. The impact on health of wood smoke is currently an issue of great concern with respect to small-scale burning of wood as a renewable fuel. Particle-related health hazards, attributed mainly to polycyclic organic compounds, were assessed in a large American study in Boise,. Idaho (Cupitt et aI., 1994). 【Get Price】

Phenolic Compounds in Stem Wood of Scots Pine from Different

Twelve compounds were identified in heartwood while only three compounds were present in sapwood samples. The study confirmed with results from other studies that stilbenes. (pinosylvin monomethylether and pinosylvin) are the dominant phenolic compounds in Scots pine stem wood. However, we got lower yields 【Get Price】

On the origin of phenolic compounds in the wood rays of Abies alba

Mar 28, 1975 The development and localization of phenolic compounds in sapwood and heartwood of Abies alba Mill. have been studied using cytological and UV-microspectrophotometric methods. The synthesis of 【Get Price】

Olive tree wood phenolic compounds with human platelet

Oleuropein and (+)-cycloolivil are natural polyphenolic compounds with a significant radical scavenging activity present in olive tree. We have investigated the antiaggregant effects of oleuropein and (+)-cycloolivil isolated from an ethyl acetate extract of olive tree wood. Oleuropein and (+)-cycloolivil reduced the ability of 【Get Price】

Evolution of Phenolic Compounds of Spanish Oak Wood during

the unseasoned wood and the wood after the first year of seasoning. Keywords: Phenolic compounds; seasoning; wood; Quercus robur L.; Quercus petraea Liebl.;. Quercus pyrenaica Wild.; Quercus faginea Lam. INTRODUCTION. In addition to the differences between species, the chemical composition of oak wood is also 【Get Price】

Antioxidant Phenolic Compounds of Ethanolic and Aqueous Extracts

May 21, 2015 In Central Mexico, commercial plantations of pink cedar (Acrocarpus fraxinifolius Whight & Arn.) from 7 to 15 years old are ready for harvesting to obtain wood products without current bark use. Therefore, the aim of this work was to study ethanolic and hot water extracts from A. fraxinifolius bark of 7-year-old 【Get Price】

Phenolic Composition and Related Properties of Aged Wine - MDPI

Nov 14, 2017 Abstract: The freshly distilled wine spirit has a high concentration of ethanol and many volatile compounds, but is devoid of phenolic compounds other than volatile phenols. Therefore, an ageing period in the wooden barrel is required to attain sensory fullness and high quality. During this process,. 【Get Price】

On the origin of phenolic compounds in the wood - Springer Link

Wood Science and Technology Vol. 9 (1975) p. 165-173. 9 by Springer-Verlag 1975. On the Origin of Phenolic Compounds in the Wood Rays of Abies alba*. By Narayan Parameswaran and Josef Bauch**. [nstitut f'tir Holzbiologie und Holzschutz der Bundesforschungsanstalt ffir Forst- und Holzwirt- schaft und Ordinariat flit 【Get Price】

Phenolic compounds in silver birch (Betula pendula Roth) wood

Abstract. Three new phenolic compounds and 15 known phenolic compounds (two phenyl glucoside esters, five lignans, three diarylheptanoids and five simple aldehydes or ketones) were isolated from the secondary xylem of mature Betula pendula Roth. The compounds were identified on the basis of their NMR (1D and 【Get Price】

Phenolic compounds in oak wood extracts used in the ageing of

The oak wood extracts used in brandy production are extremely varied because of the different ways in which they are made: by infusion, by boiling or by maceration, with or without prior physical or chemical treatment of the wood. Such extracts release a large quantity of phenolic compounds and a very small amount of 【Get Price】

Phenolic Components and Antioxidant Activity of Wood Extracts from

Jul 8, 2015 The wood samples were collected during the pruning works from trees growing under the same agronomical and environmental conditions. The 10 ethyl acetate extracts were submitted to HPLC-DAD/ESI-MS analysis to determine the phenolic constituents. Seventeen compounds were identified (10 【Get Price】

Phenolic Extractives and Natural Resistance of Wood - IntechOpen

Wood is a natural organic material that consists mainly of two groups of organic compounds: carbohydrates (hemicelluloses and cellulose) and phenols (lignin), that correspond to (65-75%) and (20-30%), respectively (Pettersen 1984). The wood is also constituted of minor amounts of extraneous materials, mostly in the 【Get Price】

Extraction of Phenolic Compounds from Oak Wood in Model

Research Note. Extraction of Phenolic Compounds from Oak Wood in Model Solutions and Evolution of Aromatic Aldehydes in Wines Aged in Oak Barrels. JEAN-LOUIS PUECH 1. Bulgarian oak wood released tannins, lignin, and aromatic substances into a model hydroalcoholic solution buffered to pH 3.5, similar to that of 【Get Price】

Extractives

wood are few. However, a great diversity in extractives are found through wood species. ? Although the extractives are low in concentration compared with those of the cell wall polymers, this fraction characterizes compounds in certain wood species. Lower terpenoids, resin acids, phenolic substances: protection the. 【Get Price】

Identification of the main phenolic compounds in wood of Ceratonia

Phytochem Anal. 2004 Nov-Dec;15(6):385-8. Identification of the main phenolic compounds in wood of Ceratonia siliqua by GC-MS. Balaban M(1). Author information: (1)Istanbul University, Faculty of Forestry, Bah?ek?y, Istanbul, Turkey. mbalabanistanbul.edu.tr. The tannin composition of wood of Ceratonia siliqua 【Get Price】

kinetics of impregnation/evaporation and release of phenolic

SUMMARY. An essay was carried out under model conditions, simulating the natural ageing of brandies in. 250 dm3 wooden barrels, to study the kinetics of impregnation/evaporation of brandy and the release of phenolic compounds from wood into the brandy. The influence of wood botanical species (Limousin oak and 【Get Price】

Comparative analysis of volatile and phenolic composition of

Oct 26, 2016 The aim of present work was to investigate the phenolic and volatile composition of cherry, acacia, and oak (from different species) wood chips. By the use of HPLC-DAD 18 different phenolic compounds were detected and quantified while for volatile composition, 33 different compounds were detected by 【Get Price】

Removal of Phenolic Compounds From Wood Preserving

PB81-172637 Removal of Phenolic Compounds from Wood Preserving Wastewaters Edward C. Jordan Co., Inc. Portland, ME Prepared for Industrial Environmental Research Lab. Cincinnati, OH Mar 81 U.S. DEPARTMENT OF COMMERCE National Technical Information Service 【Get Price】

recovery of phenolic compounds from eucalyp - Semantic Scholar

In this work the partition behavior of phenols using ethanol-salt-based aqueous two phase systems. (ATPS) was evaluated. The aim was the recovery of phenolic compounds with antioxidant capacity from eucalyptus wood industrial wastes. Experiments were planned to study the influence of sever- al parameters on 【Get Price】

Phenols - Wikipedia

In organic chemistry, phenols, sometimes called phenolics, are a class of chemical compounds consisting of a hydroxyl group (—OH) bonded directly to an aromatic hydrocarbon group. The simplest of the class is phenol, which is also called carbolic acid C 6H 5OH. Phenolic compounds are classified as simple phenols or 【Get Price】