A COMPARISON BETWEEN THREE METHODS OF MEASURING MICROFIBRIL ANGLE IN COMPRESSION AND OPPOSITE WOOD OF CUPRESSUS ARIZONICA

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OULADI R.; PARSAPAZHOUH D.; POURTAHMASI K.

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Journal: Journal of Forest and Wood Products Year:2009 | Volume:62 | Issue:1 Page(s): 21-33

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Title

A COMPARISON BETWEEN THREE METHODS OF MEASURING MICROFIBRIL ANGLE IN COMPRESSION AND OPPOSITE WOOD OF CUPRESSUS ARIZONICA

Author(s)

OULADI R. | PARSAPAZHOUH D. | POURTAHMASI K. | Issue Writer Certificate

Keywords

CUPRESSUS ARIZONICAQ2

MICROFIBRIL ANGLEQ3

COMPRESSION WOODQ3

IODINE CRYSTAL DEPOSITION METHODQ3

INDUCING CRACKS IN THE SECONDARY WALL METHODQ3

ORIENTATION OF PIT APERTURE METHODQ3

Abstract

In this study, the MICROFIBRIL ANGLE was determined utilizing three methods; "iodine crystal deposition", "inducing cracks in the secondary wall" and "Orientation of pit aperture". Besides, a comparison was made between these methods. Hence, samples were taken from compression and opposite side of four leaned cypress stand in cypress plantation of University of Tehran. Iodine crystal-stained sections did not produce satisfactory mocrofibril angle data because crystals hardly deposit on cell wall cracks and therefore it was impossible to determine MFA using this technique. The mean MFA of samples were measured using two other techniques. The results demonstrate good agreement between these two methods. But since it was hard to determine great MFA (more than 40 degree) using pit aperture method; it is not recommended to utilize this technique when compression and latewood are concerned. The relationship between data of these two methods was described as the following equation: Y = 9.3 + 1.3 X. Where "X" is the value of MFA obtained by the method of "inducing cracks in the secondary wall" and "Y" is probable value which will be obtained by the other method.

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APA: Copy

OULADI, R., PARSAPAZHOUH, D., & POURTAHMASI, K.. (2009). A COMPARISON BETWEEN THREE METHODS OF MEASURING MICROFIBRIL ANGLE IN COMPRESSION AND OPPOSITE WOOD OF CUPRESSUS ARIZONICA. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), 62(1), 21-33. SID. https://sid.ir/paper/163074/en

Vancouver: Copy

OULADI R., PARSAPAZHOUH D., POURTAHMASI K.. A COMPARISON BETWEEN THREE METHODS OF MEASURING MICROFIBRIL ANGLE IN COMPRESSION AND OPPOSITE WOOD OF CUPRESSUS ARIZONICA. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2009;62(1):21-33. Available from: https://sid.ir/paper/163074/en

IEEE: Copy

R. OULADI, D. PARSAPAZHOUH, and K. POURTAHMASI, “A COMPARISON BETWEEN THREE METHODS OF MEASURING MICROFIBRIL ANGLE IN COMPRESSION AND OPPOSITE WOOD OF CUPRESSUS ARIZONICA,” JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 62, no. 1, pp. 21–33, 2009, [Online]. Available: https://sid.ir/paper/163074/en

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