Results 111 to 120 of about 23,679 (205)

San Francisco Bay Area KIPP Schools: A Study of Early Implementation [PDF]

, 2006
Measures how well five San Francisco Bay Area schools have implemented the goals of the Knowledge Is Power Program during the first year of a three-year initiative to prepare underserved urban youth for ...
Alejandra Lopez-Torkos, Elizabeth Grant, Jane L. David, Katrina R. Woodworth, Roneeta Guha, Viki M. Young   +5 more
core  

APPLICATION OF X-RAY TECHNIQUE IN NONDESTRUCTIVE EVALUATION OF EUCALYPT WOOD

Maderas: Ciencia y Tecnología, 2008
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.
M Tomazello, S Brazolin, M. P Chagas, J. T. S Oliveira, A. W Ballarin, C. A Benjamin   +5 more
doaj  

Density and mechanical properties of oak sapwood versus heartwood in three different oak species [PDF]

, 2013
The aim of this study was to investigate the main mechanical properties of sapwood and heartwood in white and red oaks. Samples of wood were taken from 26 oak beams prepared to be used for railway sleepers, of which 62% were from white oak (either ...
Merela, Maks, Čufar, Katarina
core  

SOME ASPECTS OF WESTERN HEMLOCK AIR PERMEABILITY

Maderas: Ciencia y Tecnología, 2008
Knowledge of the variability of fluid permeability of wood in general and of western hemlock in particular is of significant importance to the primary and secondary wood products processing industry of coastal British Columbia.
Prasad Rayirath, Stavros Avramidis
doaj  

Constituents of Pine Heartwood. XII. The Heartwood of Pinus ponderosa Dougl. [PDF]

Acta Chemica Scandinavica, 1949
Gösta Lindstedt, J. Glavind, Börje Hägerstrand, Aune Kainulainen, Aira Halonen, Erkki Pulkkinen   +5 more
openaire   +1 more source

Selected Wood Properties of Prunus Africana (Hook) Grown in Kenya as Possible Reasons for its High Natural Durability

Drvna Industrija, 2013
Studies were carried out on the influence of Prunus africana heartwood extractives on the growth of selected wood decay fungi. Also, wood chemical and mineral content, dimensional stability and anatomical features of P. africana were studied.
Francis Mburu, Peter Sirmah, Fred Muisu, Stéphane Dumarcay, Philippe Gérardin   +4 more
doaj  

Constituents of Pine Heartwood. XIII. The Heartwood of Pinus Jeffreyi Balf. [PDF]

Acta Chemica Scandinavica, 1949
Gösta Lindstedt, J. Glavind, Börje Hägerstrand, Aune Kainulainen, Aira Halonen, Erkki Pulkkinen   +5 more
openaire   +1 more source

Effects of moisture content on the behaviour of Scots pine heartwood and sapwood under impact

Journal of Wood Science
The material properties of sapwood and heartwood vary within various wood species and even they can show significant differences within a single tree. Scots pine (Pinus sylvestris L.), a species that plays a crucial role in timber production for joinery ...
Mojtaba Hassan Vand, Jan Tippner
doaj   +1 more source

Constituents of Pine Heartwood. IX. The Heartwood of Pinus montana Mill. [PDF]

Acta Chemica Scandinavica, 1949
Gösta Lindstedt, Erik Wåhlin, Lars Gunnar Sillén   +2 more
openaire   +1 more source

Investigation of Thermal and Sound Insulation Properties of Sapwood and Heartwood of Willow Tree

BioResources
The heat and sound insulation properties of the heartwood and sapwood of willow (Salix alba L.) were investigated.  Based on the experimental results, it was determined that the density value of the heartwood of the willow tree was higher than that of ...
Musa Kaya, Ramazan Bülbül, Mutlu Türk
doaj