This study was carried out to evaluate quantitatively some properties (density, equilibrium moisture content, shrinkage, water vapor adsorption, water absorptivity, compressive strength, bending strength, hardness and decay resistance) of Larix kaempferi lumber which was heat-treated by hot air and has been used commercially in Korea. Equilibrium moisture content of the heat-treated wood was decreased with increase of hydrophobicity. Dimensional stability of the wood was improved with decrease of shrinkage, water vapor adsorption and free water absorptivity. Also, with the thermo-chemical changes of wood component and lower equilibrium moisture content, decay resistance and

The available supply of yellow-poplar (Liriodendron tulipitera L.), its potential for new uses, and its continuing importance to the furniture industry have created a need to accumulate additional information about this species. As an aid to better utilization of this species. charts for determining cutting stock yields from yellow-poplar lumber are presented for each of the five top grades. Adjustment charts present the changes for specified width cuttings, also by grade. Yield and cost comparisons are made for various grades and grade mixes, with a case study used for illustration. The data should aid manufacturers by making possible comparison of study yields with actual mill yields, comparison of various grade yields with one another, and the evaluation of grade mixes for most efficient production of cutting bill. ,

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목재공학 38(6 ): 518∼525, 2010 M okch ae K onghak 38(6): 518∼525