Abstract: This invention relates to a method for determining fruiting body and mycelium of Antrodia cinnamomea and Antrodia salmonea. By using ten known components in Antrodia cinnamomea including five ergostanes (antcins C and K, zhankuic acids A, B and C), four lanostanes (sulphurenic acid, dehydrosulphurenic acid, eburicoic acid, dehydroeburicoic acid), and one monophenyl (4,7-dimethoxy-5-methyl-1,3-benzodioxole) as standards, differentiation of mycelia and basidiomes of Antrodia cinnamomea was carried out in the invention. The natural basidiomes collected from wood of Cinnamomum kanehirai at natural forests and the cultural basidiomes grown on potato dextrose agar medium contained all ten tested components. However, the natural mycelia collected from wood of C. kanehirai at a natural forest and the liquid/solid cultural mycelia grown on potato dextrose broth/potato dextrose agar media contained the four lanostanes and 4,7-dimethoxy-5-methyl-1,3-benzodioxole, but not the five ergostanes.

Abstract: The present invention discloses a method for evaluating the sound speed end dynamic modulus of elasticity of wood by non-destructive stress wave testing, wherein a timber specimen of long post is placed steadily on a sensor near the center with friction, acting on the interfaces of the sensor and the timber specimen, which resists the timber specimen from moving. Pounding one end of the timber specimen with a striking instrument sends a compression pulse stress wave down the post toward the other end, thereby generating a tension pulse wave back along the post till friction exponentially dissipates the energy of the stress waves. The changing signals of friction received by a receiver support the analyzer to measure longitudinal fundamental frequency of timber specimen; therefore, sound speed and dynamic modulus of elasticity are then calculated.

Abstract: The present invention discloses a method for evaluating the sound speed and dynamic modulus of elasticity of wood by non-destructive stress wave testing, wherein a timber specimen of long post is placed steadily on a sensor near the center with friction, acting on the interfaces of the sensor and the timber specimen, which resists the timber specimen from moving. Pounding one end of the timber specimen with a striking instrument sends a compression pulse stress wave down the post toward the other end, thereby generating a tension pulse wave back along the post till friction exponentially dissipates the energy of the stress waves. The changing signals of friction received by a receiver support the analyzer to measure longitudinal fundamental frequency of timber specimen; therefore, sound speed and dynamic modulus of elasticity are then calculated.

Abstract: A non-destructive stress wave testing method for wood. Two strain gauges are disposed on a timber. The timber is struck to generate an impact compression stress wave. The impact compression stress wave is measured by the strain gauges. An oscilloscope is provided to measure the time difference of the impact compression stress wave passing through the semiconductor strain gauges. The resonance frequency of the timber is sensed by the strain gauges and displayed on an FFT spectrum analyzer. Then, the speed of sound in the timber is determined according to the distance between the strain gauges and the time difference, or according to the length and the resonance frequency thereof. The strain gauges may be semiconductor strain gauges. The modulus of elasticity of the timber is determined according to the speed of sound therein and the density thereof.