نتایج جستجو برای: poplar wood
تعداد نتایج: 42866 فیلتر نتایج به سال:
Background Plant polyamines are preferentially detected in actively growing tissues and have been implicated in growth and developmental processes such as embryogenesis, floral developmental, fruit ripening, senescence and stress responses [1]. Recently it has been established a link between polyamines and vascular development as it was found that, in Arabidopsis, the loss-of-function mutants o...
The technology of dyeing wood by microorganisms is a kind pollution-free and sustainable technology. To achieve fast rich Lasiodiplodia theobromae on the surface poplar wood, tyrosinase tricyclazole were used as induction factors in this experiment. results showed that L. had better effect cross-section induced with tricyclazole. color ranged from light yellow to gray brown, chromatic aberratio...
Potassium and calcium are essential for tree metabolism and various physiological processes related to growth. In recent years, special interest was therefore accorded to the effect of both cations on cambial activity and xylem development. Various studies revealed a distinct correlation between potassium as well as calcium nutrition and wood formation. When poplar trees were grown under low K(...
Transgenic down-regulation of the Pt4CL1 gene family encoding 4-coumarate:coenzyme A ligase (4CL) has been reported as a means for reducing lignin content in cell walls and increasing overall growth rates, thereby improving feedstock quality for paper and bioethanol production. Using hybrid poplar (Populus tremula × Populus alba), we applied this strategy and examined field-grown transformants ...
The combination of alkaline delignification and densification was applied to improve wood mechanical strength. Poplar samples were subjected alkali with varying degrees lignin hemicellulose removal followed by hot pressing. Dynamic performances dynamic sorption behavior the untreated densified then evaluated. Results showed that appropriate can stiffness reduce moisture numbers sites. Fourier t...
Fast-growing poplar wood was modified with low molecular weight ureaformaldehyde resin (UF) at 41.5% concentration or phenol-formaldehyde (PF) at concentrations of 15, 25, and 40%. The physical and mechanical properties were measured, and creep behavior tests were carried out under ambient indoor conditions. The specimens were subjected to 30 and 50% of their maximum bending load. The density, ...
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