Quality of Turkey Oak<i>(Quercus cerris</i>L.) Wood. I. Soluble and Insoluble Proanthocyanidins

Lavisci, P.; Scalbert, Augustin; Masson, Daniel; Janin, G.

doi:10.1515/hfsg.1991.45.4.291

Cited by 24 publications

(19 citation statements)

References 7 publications

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“…During drying, for some species (mainly softwoods), hydrophilic and lipophilic extractives migrate towards the surface and become distributed on the board surface causing a brown stain. Zavarin (1984), Lavisci et al (1991), Terziev (1995, Wiberg (1996), Schmidt and Kreber (1998), Terziev and Boutelje (1998), Terziev and Nilsson (1999), McDonald et al (2000) suggested the formation of kiln brown stain in radiata pine. P. radiata is associated with elevated contents of reduced sugars and amino acids.…”

Section: Causes Of Wood Discoloration 41 Heatmentioning

confidence: 97%

Causes of color changes in wood during drying

et al. 2010

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The forest industry operates in a dynamic and global market where change and competition are the rule rather than the exception. The color of wood is one of the most attractive features for the modern wood industry. Even when wood is chosen for its structural qualities, attractive and decorative colors are usually an important factor. In many applications, particularly in furniture, decorative products, decorative veneers and fl ooring, accurate matching of the color of different samples is required. Wood attributes and properties are important because they have a direct bearing on market opportunities and consumer acceptance for many types of manufactured wood products. The aim of this review is to identify causes of wood discoloration and advances in drying technology to overcome this problem. Wood discoloration is a complex phenomenon, mainly affected by heat, light, physiological and biochemical reactions, as well as from attack by microorganisms.

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Section: Causes Of Wood Discoloration 41 Heatmentioning

confidence: 97%

Causes of color changes in wood during drying

et al. 2010

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“…The principal limiting factors include the following: low dimensional stability, elevated internal tension, strong swelling and shrinkage, and low durability, mainly in sapwood (Giordano 1981). Also, a difficulty in gluing (Lavisci et al 1991) and a not very appealing surface color (Tolvaj and Molnart 2006) have precluded, up to now, penetration of this wood in the furniture market. Nevertheless, the color change is often viewed positively, especially in hardwoods, for which there is a strong difference between heartwood and sapwood, such as Turkey oak.…”

Section: Introductionmentioning

confidence: 99%

“…No data have been reported in the literature concerning the different chemical components between heartwood and sapwood for Turkey oak wood, although Lavisci et al (1991) have reported that the nature and concentration of extractives for this kind of wood are quite different, principally in terms of the insoluble fraction. Turkey oak might be a valuable commercial wood, but its value is often degraded by a variety of stains, most of which are due to extractives such as tannins in the wood.…”

Section: Introductionmentioning

confidence: 99%

Effect of Combined Steam and Heat Treatments on Extractives and Lignin in Sapwood and Heartwood of Turkey Oak (Quercus cerris L.) Wood

et al. 2013

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Combined treatment with steam and heat was imposed on green Turkey oak (Quercus cerris L.) wood, both for sapwood and heartwood. Steaming was carried out in an autoclave at 100, 120, or 130 °C, and then a portion of the samples was heated in an oven for 2 h at 120 or 180 °C. Extraction with ethanol provided the greatest extractive contents in sapwood, and the extractive quantity decreased as the heating temperature was increased to 180 °C. In contrast, extraction with dichloromethane provided the greatest extractive content in heartwood, and no sizeable differences were found among the various treatments. Lignin amounts increased with rising treatment temperatures combined with steaming at 100 and 120 °C until the greatest value of 31.1% lignin content was reached. However, the lignin content decreased as the steaming temperatures rose to 130 °C. In all the combined treatments, the lignin content was greater in heartwood than in sapwood. Moreover, both steaming and heating applied individually produced no significant effect on lignin content.

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“…The tannin concentrations also depend on the species considered. F or example, heartwoods of Q. robur, Q. rubra (Scalbert et al 1989) and Q. cerris (Lavisci et al 1991) contain 8, I, and 0.3% tannins respectively.…”

Section: Tannin Contentmentioning

confidence: 99%

“…Similarly, condensed tannins commonly occur in insoluble forms (Lavisci et al 1991), but cannot be easily estimated (Scalbert 1992b).…”

Section: Tannin Structuresmentioning

confidence: 99%