tailieunhanh - Moisture content effect on sound wave velocity and acoustic tomograms in agarwood trees (Aquilaria malaccensis Lamk.)

Gaharu or agarwood or oudh is a fragrant and highly valuable nontimber forest product obtained from several species of trees that produce it in response to wounding or fungal attack. The aims of the study were to evaluate the sound wave velocity change from green to dry conditions in agarwood and tomographic images associated with changes in the moisture content. | Turkish Journal of Agriculture and Forestry Turk J Agric For (2016) 40: 696-704 © TÜBİTAK doi: Research Article Moisture content effect on sound wave velocity and acoustic tomograms in agarwood trees (Aquilaria malaccensis Lamk.) 1, 1 2 1 1 Lina KARLINASARI *, Nadya PUTRI , Maman TURJAMAN , Imam WAHYUDI , Dodi NANDIKA Department of Forest Product, Faculty of Forestry, Bogor Agricultural University (IPB), Bogor, Indonesia 2 Research and Development for Conservation and Rehabilitation, Ministry of Forestry Republic of Indonesia, Bogor, Indonesia 1 Received: Accepted/Published Online: Final Version: Abstract: Gaharu or agarwood or oudh is a fragrant and highly valuable nontimber forest product obtained from several species of trees that produce it in response to wounding or fungal attack. The aims of the study were to evaluate the sound wave velocity change from green to dry conditions in agarwood and tomographic images associated with changes in the moisture content. A total of 10 trees were selected for this study; five trees were artificially inoculated and the other five were left untreated. After in situ measurement of standing trees stem using nondestructive testing (PiCUS sonic tomography), air-dried disk samples from the trees were assessed. The results showed that sonic velocity values increase from 12% to 22% as moisture content decreases from a green condition (live tree) to an air-dried condition (disk sample). Nevertheless, solid and damage areas revealed only slight differences on the tomograms. This research combines traditional visual assessment with tomography to better detect the presence of agarwood in trees. Key words: Agarwood, moisture content, sound wave velocity, acoustic tomograph, nondestructive testing 1. Introduction Currently, nondestructive testing (NDT) tools based on sound waves have been developed in the context of .

• Nông nghiệp
• Moisture content
• Sound wave velocity
• Acoustic tomograph
• Nondestructive testing
• Agarwood trees
• Rupture force
• Grain moisture content
• Loading rate
• Rupture force of paddy
• Moisture content of paddy grain
• Moisture stress
• Cowpea (Vigna unguiculata L walp )
• Different stages of growth
• Leaf relative water content
• Drought stress
• Macro nutrient
• Micro nutrient
• Different wheat genotypes
• Affected by moisture stress
• Soil texture
• Gravimetric water content
• Moisture depletion rate
• Drying pattern
• Soil moisture after saturation
• Recommended dose of fertilizer
• In situ
• Soil moisture conservation
• Foliar nutrition
• Rainfed Bt cotton (Gossypium hirsutum L )
• Effect of slice moisture
• Slice moisture
• Quality of potato chips
• Refined soya bean oil
• Package in polyethylene bag
• Oil content of the chips
• Leaf nutrient
• Laboratory chemical analysis
• Peanut Arachis hypogaea L
• Color parameters
• Mechanical parameters of earlywood
• Microfibril angle
• Pine wood
• Tensile stress
• Wood density
• Green volume method
• Oven dry method
• Maximum moisture content method
• Preservative uptake
• Full cell process
• Caucasian fir
• Abies spp
• Dielectric constant
• Dielectric loss tangent
• Dielectric properties of bamboo
• Frequency variation
• Physical properties
• Physical properties of soybean
• Porosity decreased
• Bulk density
• Mass flow rate
• Machine parameters on quality
• Extrudates prepared
• Different blends
• Kodo millet
• Physical property
• Improved variety
• Varieties of kodo millet
• PPFM spray on leaf relative water content
• Leaf proline
• Chlorophyll stability index
• Yield of cotton
• Moisture stress condition
• Textural properties
• Confection products
• Khoa based products
• Moisture content during storage
• Correlating the texture profile
• Textural properties of products
• Plant Biology
• Cold stratification
• Soil moisture content
• Stratification duration
• Climate change
• Soybean protein
• Oil content of soybean
• Stages of harvesting
• Threshing method
• Ash Yield
• Low Temperature Ashing
• Mineral Matter
• Experimental determination
• Time consuming process
• Requires highly skilled analyst
• Hot air oven dryer
• Osmo dried papaya slices
• Drying rate
• Self life
• Chemical activities
• Land configuration
• Flat bed
• Ridge and furrow
• Raised bed
• Mean moisture content
• Dry spell
• Journal of Agriculture and Forestry
• Polynomial prediction equation
• Respiratory rate
• Triticum monococcum L
• CO2 emission
• soil temperature
• O2 content
• Soil moisture
• Microbial respiration
• Mechanical properties
• Protein content
• Wheat varieties
• Energy absorbed
• Moisture dependent physical