Chemistry of wood
Ramin Vaysi; Majid Kiaei; Sayed Sajad Ashrafi; Amin Jourbandian
Abstract
The aim of this study was accomplished on identification and comparison of the phenolic chemical components in wood of Siberian elm, Common elm and Mountain elm tree. For this purpose, the samples were chosen randomly from of elm trees in Nowshahr's forest region. Then, flour and ash were provided from ...
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The aim of this study was accomplished on identification and comparison of the phenolic chemical components in wood of Siberian elm, Common elm and Mountain elm tree. For this purpose, the samples were chosen randomly from of elm trees in Nowshahr's forest region. Then, flour and ash were provided from these woods of species (separate) by TAPPI standards. After samples prepared, samples were injected to the GC/MS device for it analysis. Identification of compounds was done by retention time of each compound, calculation of Quats index and Adams table. The result of GC-MS showed that there were 116, 41 and 18 compounds in wood of Siberian elm, Common elm and Mountain elm tree, respectively. That 5-Hydroxy-calamenen (21.23%), 1-Naphthalen carboxylic acid (15.41%), Naphthalene (0.96%) and phthalate (1.00%) were the most important compounds in wood of Siberian elm. The 5,6,7,8-tetrahydro-2,5-dimethyl-8-(1-methylethyl)-1-Naphthalenol(18.59%), Gamma-Sitosterol (13.44%), bis (2-ethylhexyl) phthalate (12.28%) and 1-Naphthalen carboxylic acid (5.73%) were the most important compounds in wood of Common elm, too. There were the bis (2-ethylhexyl) phthalate (93.40%), 4-(N-Isopropylamino)-6-phenyl (1.89%), 5, 6, 7, 8-tetrahydro-1-naphthalenol (1.80%) and 8-methoxy-1-acetonaphthone (0.27%) as the most important compounds in wood of Mountain elm tree. In addition, the results showed that 9,12-Octadecanoic acid, Hexadecane, Dodecan, Tetradecan, 1-Naphthalen carboxylic acid and bis (2-ethylhexyl) phthalate were the 6 common compounds in the wood of Siberian elm and Common elm tree. There were the Qoinindolin, Tetradecan, Hexadecanoic acid and bis (2-ethylhexyl) phthalate were the 4 common compounds in the wood of Siberian elm and Mountain elm tree. There were the Tetradecan, Hexadecanoic acid and bis (2-ethylhexyl) phthalate were the 3 common compounds in the wood of Common elm and Mountain elm tree, too. The gas chromatographs showed that Tetradecan and bis (2-ethylhexyl) phthalate were the 2 common compounds in three spices of elm trees.
Chemistry of wood
milad tajik; ramin vaysi; majid kiaei
Abstract
This research was carried out to identification and comparison of organically chemical component in the wood / bark extractives Eucalyptus camaldulensis. Three healthy trees were cut down from Nowshahr forest and samples were converted into the wood flour. The extractives was prepared with acetone solvent ...
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This research was carried out to identification and comparison of organically chemical component in the wood / bark extractives Eucalyptus camaldulensis. Three healthy trees were cut down from Nowshahr forest and samples were converted into the wood flour. The extractives was prepared with acetone solvent according to TAPPI standard, then transfer to the ballon and then the BSTFA catalyst was added and transfer to the GC / MS injections. Identification of components was done according to the retention time curve, calculation of Kovats correlation and Adams table. Out of 13 components in the bark of Eucalyptus and 18 components in that wood, 2 constituents such as Bis (2 - ethyl hexyl) phthalate and hexadecanoic acid was detected as the same. The most important of chemical component in the bark is (2 _ ethyl hexyl) phthalate (98.72 %). 2 - Pentanone (57.41 %) was important component in the eucalyptus wood .
Physics and anatomy
Majid Kiaei
Abstract
This study examined the effects of altitude and soil characteristics on wood properties of Eldar pine and soil characteristics in western of Mazandran forest. For this purpose, nine normal pine trees was selected from three classes of altitude 500, 1200, and 1400 m, which located in Chaloos region. Disks ...
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This study examined the effects of altitude and soil characteristics on wood properties of Eldar pine and soil characteristics in western of Mazandran forest. For this purpose, nine normal pine trees was selected from three classes of altitude 500, 1200, and 1400 m, which located in Chaloos region. Disks were cut at breast height for each of trees. Testing samples were taken in radial position from the pith to the bark to determine wood properties such as oven dry density, wood basic density, and annual ring width. For each of tress in three different altitudes, four soil profiles of 20-40cm depth was taken to examine soil physical and chemical properties include clay, silt, sand, pH, Mn, fe, cu, zn, P, and K. Then relationship between the soil and wood properties were investigated with Pearson correlation and multiple correlations. Results of soil and wood properties indicated that by increasing altitude, the amount of annual ring width was increased, and the wood density was decreased, while the clay, Mn, fe, and Cu content in altitude 1200m, silt, Zn and K in lower altitude and P and sand in higher altitude is higher than other altitudes. Among of above variables, only the effect of clay, sand, P and Fe of soils on the wood different properties by Pearson correlation. The relationship between soil and wood properties by forward stepwise regression indicated that
