نتایج جستجو برای: wood chemical component

تعداد نتایج: 1004495  

2000
J. P. Diebold Stefan Czernik

........................................................................................................................ 1 1.0 Introduction .......................................................................................................................... 1 1.1 Storage Stability Problem.......................................................................... 1 1.2 Combustion Problems Ca...

2012
Li Yongfeng Liu Yixing Li Jian Li Jun

A novel biomass composite inspired from wood porous structure was manufactured by impregnating vinyl monomer into wood cellular structure under vacuum conditions, and initiating the monomer for in situ polymerization through a thermal treatment. The vacuum condition was studied, and the mechanical properties of the composite were also tested. SEM observation shows that polymer generated in the ...

Journal: :Annals of agricultural and environmental medicine : AAEM 2011
Andrzej Krauss Hanna Krauss Bogusława Waliszewska Jacek Piątek

The chemical and elemental composition of caviuna wood was determined. The elemental composition of the examined wood was similar to the elemental composition of the deciduous tree species of the temperate zone except that it did not contain sulphur. The examined wood was found to comprise a very high content of extractive substances which could contain toxic substances, as well as a considerab...

2015
Zhong Yang Yana Liu Xiaoyu Pang Kang Li

The feasibility of using near-infrared spectroscopy (NIR) to identify wood species was investigated in this study. Case I considers the principal component analysis scores plot of NIR spectra for three wood species. Case II considers whether NIR combined with partial least squares discriminant analyses can be used to identify the three wood species. Three wood species were studied, and each spe...

Journal: :The New phytologist 2014
Adam R Martin David L Erickson W John Kress Sean C Thomas

In tropical and temperate trees, wood chemical traits are hypothesized to covary with species' life-history strategy along a 'wood economics spectrum' (WES), but evidence supporting these expected patterns remains scarce. Due to its role in nutrient storage, we hypothesize that wood nitrogen (N) concentration will covary along the WES, being higher in slow-growing species with high wood density...

2013
Tilman Grünewald Warren Grigsby Gianluca Tondi Sven Ostrowski Alexander Petutschnigg Stefanie Wieland

Intelligent resource usage is one of the most challenging tasks for the wood-based panels industry. With respect to this issue, leather shavings, derived during leather preparation, are a promising new raw material, as they offer not only high availability, but also potentially enhance material properties such as panel fire retardancy. In order to improve the performance of these emerging panel...

2013
Shuang-Yan Zhang Chuan-Gui Wang Ben-Hua Fei Yan Yu Hai-Tao Cheng Gen-Lin Tian

Chinese Fir wood (Cunninghamia lanceolata (Lamb.) Hook) was subjected to extraction treatments with sodium chlorite (NaClO2) for delignification, as well as with sodium hydroxide (NaOH) at different concentrations for extraction of hemicelluloses. The wood was examined using a Fourier Transform Infrared (FT-IR) spectrometer and microtension technique to track changes in the chemical and the mic...

Journal: :PLoS ONE 2009
Joseph Nagyvary Renald N. Guillemette Clifford H. Spiegelman

Following the futile efforts of generations to reach the high standard of excellence achieved by the luthiers in Cremona, Italy, by variations of design and plate tuning, current interest is being focused on differences in material properties. The long-standing question whether the wood of Stradivari and Guarneri were treated with wood preservative materials could be answered only by the examin...

2016
Chiara Civardi Jan Van den Bulcke Mark Schubert Elisabeth Michel Maria Isabel Butron Matthieu N. Boone Manuel Dierick Joris Van Acker Peter Wick Francis W. M. R. Schwarze

The North American wood decking market mostly relies on easily treatable Southern yellow pine (SYP), which is being impregnated with micronized copper (MC) wood preservatives since 2006. These formulations are composed of copper (Cu) carbonate particles (CuCO3·Cu(OH)2), with sizes ranging from 1 nm to 250 μm, according to manufacturers. MC-treated SYP wood is protected against decay by solubili...

2008
M. Tomazello S. Brazolin M. P. Chagas J. T. S. Oliveira A. W. Ballarin C. A. Benjamin

X-rays were initially used for the inspection of special-purpose wood pieces for quantitative evaluation of wood properties of different species. X-ray densitometry has had its use expanded in dendroclimatology of Picea engelmannii trees. Subsequent laboratories developed applications of X-ray densitometry for environmental, wood science and technology, and related areas. This paper describes t...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید