Search

General and anatomical features of fourteen wood species from Maluku were observed and described for identification purposes. Except for Heritiera littoralis Dryand and Tarrietia riedeliana Oliv., all wood species could be distinguished one from the others based on anatomical characters. A tentative identification key is presented.

The aim of this investigation is to create a prediction model on the potentiality of supplying merchant wood products. The investigation was carried out in the province of Riau Four Sawmills and two plywood industries were selected for this study. The annual data concerning production factors (input factors) such as material input (x1), the price of raw material (x2), The cost of additive matters/auxiliaries (x3), the designed production capacities (x4), and the price per unit product (x5) were collected. In addition, their annual production (Y) was also recorded. The prediction model is intended to interpret the relationship between production factors and their actual production per annum by applying multiple regression analysis. The prediction models for Sawmill products and plywood products are presented respectively as follow : Y = 7.2140 + 0.5717 x1 – 0.1323 x2 – 0.1787 x3 + 0.0078 x4 + 0.2188 x5, and Y = 10.1774 + 2.1724 x1 – 0.6431 x2 + 0.0071 x3 + 0.6182 x4 + 0.7128 x5. Both models show a considerable high of confidence (P = 0.95).

The effect of cooking condition on the quality of rattan is presented in this article. Round fresh manau rattan samples, each of 100 cm in length and 3 cm in diameter were 80 stems in all. The samples were devided into 4 groups before cooking. Each group was cooked with four different oil mixtures and four levels of cooking time. The results reveal that the composition of cooking oils has a significant effect on the cane color and compressive strength parallel to grain. but has no effect on shear strength of the rattan. The mixtures containing coconut oil tends to reduce the rate of rattan skin color change during cooking. Also, such composition produced better rattan skin color in comparison with those treated with others.

A study on the physical and mechanical properties of block-board using core strip from 4 species of loging wastes has been undertaken and the results presented in this paper. The result shows that the everage value of block-board moisture content, density and strip density are 9.85%; 0.47 % and 0.43% respecttively. The bending strength of the block-board varies from 457.41 kg/cm2 (Jelutung) and 465.22 kg/cm2 (Perupuk) for paralel to the grain of the face and back veneer. The bending strength perpendicular to the grain of the outer veneer varies from 219. 76 kg/cm2 (Jelutung) and 418.85 kg/cm2 (Perupuk). The block-board samples which uses core strips from the 4 wood species have glue shear strength properties which complies with the Indonesian, German and Japanesse (JAS) standard, while the delamination complies only with Japanesse (JAS) standard.