The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
L. Inzunza - One of the best experts on this subject based on the ideXlab platform.
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DISTRIBUTION OF WITHIN-RING INTERNAL CHECKING IN Pinus Radiata GROWN IN SOUTHERN CHILE DISTRIBUCIÓN DE GRIETAS INTERNAS INTER-ANULARES EN Pinus Radiata CRECIDO EN EL SUR DE CHILE
2009Co-Authors: A. Aguilera, L. InzunzaAbstract:The increase of Pinus Radiata plantations in Chile has brought larger annual volumes to the industry and the opportunity to process them into value-added products. Within-ring checks constitute an important problem that may affect the appearance quality of lumber. This problem occurs in the early wood portion of sapwood growth rings in dry lumber and can only be seen when the board is cross cut. The purpose of this study was to analyze the frequency of within-ring internal checking in kilndried Pinus Radiata lumber from different logs grown in southern Chile. Centre boards were more affected by the internal checking. Checks were located more frequently between rings 4 to 6.
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Distribution of Within-Ring Internal Checking in Pinus Radiata Grown in Southern Chile
Maderas. Ciencia y tecnología, 2009Co-Authors: A. Aguilera, L. InzunzaAbstract:The increase of Pinus Radiata plantations in Chile has brought larger annual volumes to the industry and the opportunity to process them into value-added products. Within-ring checks constitute an important problem that may affect the appearance quality of lumber. This problem occurs in the early wood portion of sapwood growth rings in dry lumber and can only be seen when the board is cross cut. The purpose of this study was to analyze the frequency of within-ring internal checking in kilndried Pinus Radiata lumber from different logs grown in southern Chile. Centre boards were more affected by the internal checking. Checks were located more frequently between rings 4 to 6. Key words: Internal checking, Radiata pine, sawmill, kiln-dried.
James C. Bathurst - One of the best experts on this subject based on the ideXlab platform.
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Effect of Pinus Radiata plantations on water balance in Chile
Hydrological Processes, 2007Co-Authors: Anton Huber, Andrés Iroumé, James C. BathurstAbstract:The effect of Pinus Radiata (D. Don) plantations on water resources at different Chilean sites located between 33 and 40 south was determined. Incoming precipitation, canopy interception loss, evapotranspiration, net evapotranspiration (transpiration and evaporation from the soil), percolation and soil water content were measured in each site, where Pinus Radiata plantations were 12 to 17 years old and between 700 and 830 trees ha−1 dense. The results were compared with those obtained from areas covered with perennial grasses and shrubs at the same sites. The pine canopies intercepted on average 36–40% of the annual rainfall at all sites where rainfall was less then 1200 mm, while only 15% of the mean rainfall was intercepted in the southernmost and rainy (2081 mm year−1) site. Annual net evapotranspiration increased from south to north from 32% of the incoming precipitation for the southernmost site to 55% for the one located at the lower latitude. In this northernmost site almost the entire incoming precipitation was evapotranspired. Annual percolation registered its minimum value in the northern site (5% of incoming precipitation) and its maxima in the southern one (53%). The values of net evapotranspiration and percolation were regulated by the pluviometric regime and the soil moisture retention capacity in each site. Compared with the shrub or grass covers, sites under Pinus Radiata plantations registered higher water consumption by evapotranspiration and reduced percolation. Copyright © 2007 John Wiley & Sons, Ltd.
R.d. Teasdale - One of the best experts on this subject based on the ideXlab platform.
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Effects of xylooligosaccharides on suspension-cultured cells and protoplasts of Pinus Radiata
Plant Cell Tissue and Organ Culture, 1997Co-Authors: K. Ishii, R.d. TeasdaleAbstract:The effects of xylooligosaccharides isolated from the cell walls of Betula platyphylla var. japonica on cells and protoplasts of Pinus Radiata were examined. The addition of a semi-purified mixture of xylooligosaccharides at a concentration of 5µg.ml−1 promoted elongation of cultured cells, whereas the neutral fraction of this mixture had no effect; a similar effect was seen in the presence of conditioned medium. The unfractionated mixture of xylooligosaccharides was also found to enhance the viability of protoplasts prepared from cell cultures of Pinus Radiata in a concentration dependent manner, highly similar to the effect provided by addition of medium conditioned by pine cells. Such effects are considered to be due to the addition of components that play a structural role in the cell wall of pines. It is inferred that the acidic components of the xylooligosaccharide mixture derived from t Betula are responsible for this effect in the distant pine species. It is speculated that acidic xylooligosaccharides operate either by replacing, or mimicking, the natural cell wall components required for growth and development of pine cultured cells.
A. Aguilera - One of the best experts on this subject based on the ideXlab platform.
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DISTRIBUTION OF WITHIN-RING INTERNAL CHECKING IN Pinus Radiata GROWN IN SOUTHERN CHILE DISTRIBUCIÓN DE GRIETAS INTERNAS INTER-ANULARES EN Pinus Radiata CRECIDO EN EL SUR DE CHILE
2009Co-Authors: A. Aguilera, L. InzunzaAbstract:The increase of Pinus Radiata plantations in Chile has brought larger annual volumes to the industry and the opportunity to process them into value-added products. Within-ring checks constitute an important problem that may affect the appearance quality of lumber. This problem occurs in the early wood portion of sapwood growth rings in dry lumber and can only be seen when the board is cross cut. The purpose of this study was to analyze the frequency of within-ring internal checking in kilndried Pinus Radiata lumber from different logs grown in southern Chile. Centre boards were more affected by the internal checking. Checks were located more frequently between rings 4 to 6.
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Distribution of Within-Ring Internal Checking in Pinus Radiata Grown in Southern Chile
Maderas. Ciencia y tecnología, 2009Co-Authors: A. Aguilera, L. InzunzaAbstract:The increase of Pinus Radiata plantations in Chile has brought larger annual volumes to the industry and the opportunity to process them into value-added products. Within-ring checks constitute an important problem that may affect the appearance quality of lumber. This problem occurs in the early wood portion of sapwood growth rings in dry lumber and can only be seen when the board is cross cut. The purpose of this study was to analyze the frequency of within-ring internal checking in kilndried Pinus Radiata lumber from different logs grown in southern Chile. Centre boards were more affected by the internal checking. Checks were located more frequently between rings 4 to 6. Key words: Internal checking, Radiata pine, sawmill, kiln-dried.
Anton Huber - One of the best experts on this subject based on the ideXlab platform.
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Effect of Pinus Radiata plantations on water balance in Chile
Hydrological Processes, 2007Co-Authors: Anton Huber, Andrés Iroumé, James C. BathurstAbstract:The effect of Pinus Radiata (D. Don) plantations on water resources at different Chilean sites located between 33 and 40 south was determined. Incoming precipitation, canopy interception loss, evapotranspiration, net evapotranspiration (transpiration and evaporation from the soil), percolation and soil water content were measured in each site, where Pinus Radiata plantations were 12 to 17 years old and between 700 and 830 trees ha−1 dense. The results were compared with those obtained from areas covered with perennial grasses and shrubs at the same sites. The pine canopies intercepted on average 36–40% of the annual rainfall at all sites where rainfall was less then 1200 mm, while only 15% of the mean rainfall was intercepted in the southernmost and rainy (2081 mm year−1) site. Annual net evapotranspiration increased from south to north from 32% of the incoming precipitation for the southernmost site to 55% for the one located at the lower latitude. In this northernmost site almost the entire incoming precipitation was evapotranspired. Annual percolation registered its minimum value in the northern site (5% of incoming precipitation) and its maxima in the southern one (53%). The values of net evapotranspiration and percolation were regulated by the pluviometric regime and the soil moisture retention capacity in each site. Compared with the shrub or grass covers, sites under Pinus Radiata plantations registered higher water consumption by evapotranspiration and reduced percolation. Copyright © 2007 John Wiley & Sons, Ltd.