The sweet chestnut (Castanea sativa Mill.) and European beech (Fagus sylvatica L.) are wood species largely present in the forest area. composition relative variation of secondary metabolites under thermal effect is a little-explored material was thermally modified at 170 °C for 3 h using thermo-vacuum technology. Raw extracts were obtained with aqueous extraction techniques an autoclave, subse...

No-choice feeding tests using ethanol, chloroform, and acetone extractives of teak (Tectona grandis) heartwood clearly showed feeding deterrent activity and toxicity to the subterranean termite Reticulitermes speratus. The amount of 2-methylanthraquinone (MAQ) in teak wood extractives was not related to the feeding deterrents or toxicity, as shown by the no-choice feeding tests conducted using ...

Increasing the net value of forestry side-streams has both ecological as well economic benefits for emerging biorefining industries. Spruce bark represents one nature’s abundant sources valuable extractives. In this study, impact storage on quality and quantity Norway spruce (Picea abies) extractives was examined a function time, environmental conditions season (i.e., winter or summer). The fro...

A procedure has been developed for the quantitative determination of the extraetable proteins of the nit heart. Utilizing extraction with a sucrose-versene solution and employing differential centrifugation, followed by extraction with a phosphate-pyrophosphate buffer, low-ionic-strength extractives, a mitochondrial fraction, and high-ionic-strength extractives have been obtained. Electrophoret...

Cellulose is usually isolated from the other components of plant material for analysis of carbon stable isotope ratios (dC). However, many studies have shown a strong correlation between whole-wood and cellulose dC values, prompting debate about the necessity of cellulose extraction for tree-ring studies. The dC values were measured in whole wood, extractive-free wood, purified cellulose, aceto...

Wood extractives cause pitch problems in pulp and paper manufacture. Extractives are low-molecular weight lipophilic components in wood consisting mainly of triglycerides, waxes, steryl esters, sterols, free long chain fatty acids and resin acids (Fengel and Wegener 1989a). The deposits of wood extractives associated with fibers, inorganic salts and additives, technically referred to as pitch, ...

Triploid Populus tomentosa Carr. (Salicaceae) is a good alternative to meet the increasing need of the global pulp and paper industry. Meanwhile, the xylem of this species could be a useful bioresource to develop low molecular extractives with significant bioactive potential. In the present work, a phytochemical investigation on aqueous EtOH extractives of Triploid P. tomentosa xylem, by system...