• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.3
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• pp.323-328
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• 2014

Effect of chitosan with sirloin specimens from chitosan-fed and normal-fed pig. The specimens were observed by a optical microscope and their biophoton was measured by a photomultiplier(PMT)tube. Results of experiments showed that specimens of the chitosan-fed pig had lower biophoton rate than that of the normal-fed pig. As a result of the organization were also shown pictures Chitosan as a pork loin tissue and fat in the flesh less delicate and compactness is found that tastes good. Thus by PMT fleshy tissue biochemical measurements to measure the change of state to be one of the new method is to be expected.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.10
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• pp.1595-1600
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• 2013

In the present study,effect of natural mulbelly leaf tea on DMEM MDCK cell line. Mulbelly leaf teas inhibited the proliferation in primery MDCK cells in a dose dependent manner. These results show that mulbelly teas potent inhibits the reactive oxygen species (ROS) and not destruction a component. Therefore, mulbelly teas might improve overall quality of the color and taste. And might be applied newly to development of componant mulbelly teas quality and biochemical change by ROS in living things.

• Transactions of the Korean Society of Mechanical Engineers
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• v.14 no.6
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• pp.1613-1620
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• 1990

For the purpose of the study on the spray characteristics of a coaxial nozzle, the measurement of the velocity and size of droplets, concentration, and the statistical correlation coefficient between the fluctuation of the velocity and that of the corresponding drop diameter have been carried out. Various method of simultaneous measurement of velocity and drop size have been developed from LDV techniques. The technique used here belongs to the method that supposed by Yule, Holve and Self. It has the advantages of making use of a standard LDV apparatus to which minor modifications have been brought, photomultiplier is equipped with a slit instead of a pinhole and observed the measuring volume at an angle of 90.deg.. The voltage supplied by the photomultiplier has undergone an appropriate analog and digital processing. The experimental results give a good idea of the two phase flow organization and can be helpful to find a drop diffusion model when suitable data are imput.

• The Journal of the Acoustical Society of Korea
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• v.40 no.5
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• pp.408-416
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• 2021

In the ultrasonic dispersion, in order to avoid direct contact of the radiation surface of ultrasonic transducers with a liquid sample, the liquid sample is separated by a glass container and it receives ultrasonic energy through an acoustic medium. The transmission efficiency of the ultrasonic energy in the multi-layered ultrasonic system is an important factor. In this study, we suggested a method that can improve the ultrasonic energy transfer efficiency by using a propylene glycol solution as a liquid matching layer in the multi-layered acoustic system. In this method, a propylene glycol solution was filled between the Langevin-type ultrasonic transducer and the luminol solution and the sonoluminescence phenomena in the luminol solution, which is caused by nonlinear effect of high power ultrasound radiated from the transducer, was examined by using a Photo Multiplier Tube (PMT). The transmission efficiency depending on the concentration of propylene glycol solution was observed, and we can see that as the concentration of the propylene glycol solution increased, the matching effect increased while the acoustic attenuation increased. It was confirmed that there is an optimal concentration compromised these two conflicting conditions, and the optimum concentration of the propylene glycol solution was determined experimentally.