• Applied Chemistry for Engineering
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• v.34 no.2
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• pp.131-136
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• 2023

We developed a method to measure the concentration of highly concentrated colored samples using color coordinates. We present a color analysis to estimate the concentration of highly concentrated binary solutions with an empirical function and apply it to estimate the kinetics of a catalytic irreversible reaction of resazurin to resorufin. The developed method enabled one to measure the concentration of solutions whose range of concentrations is nonlinear and beyond the limit of UV-vis spectroscopic measurement directly without dilution.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3131-3138
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• 2015

At a dermatology during the skin care, photodynamic therapy(PDT) is carried after 5-aminolevulinic acid(ALA), light sensitive material, is applied. At a skin care shop, using drug is prohibited. Thus, the aim of this research was to see the effect of the acne skin by irradiating PDT to the skin without applying ALA. The research method was that 24 female undergraduates who had acne on their face at the level of mild or comedonal, and the participants were divided into four groups(group1: no treatment, group 2: 420 nm of blue visible light, group 3: 660 nm of red visible light and group 4: blue and red visible light). The participants of group 2, 3 and 4 were irradiated with visible light for 20 minutes per week for 6 weeks, and they were compared to group 1. As a result of the research, the number of erythema, sebum, papules and pustules of those who were irradiated with visible light decreased, and the pore size of those also decreased while the amount of moisture increased. If an skin care shop applies PDT to the existing acne skin care, that PDT will influence on the program of a skin care shop is expected.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.871-872
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• 2012

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.2
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• pp.423-426
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• 2006

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.371-372
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• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.649-650
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• 2013

• The Science & Technology
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• v.31 no.4 s.347
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• pp.81-81
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• 1998

사람이 가까이 가면 자동으로 문이 열리고 소변기 물이 저절로 쏟아지는 것은 사람에게서 나오는 적외선 때문이라고 한다 .적외선은 가시광선보다 파장이 긴 전자파로 우리가 매일 태양으로부터 받아 따뜻하게 느끼는 에너지 파이다 .가장 재미있는 적외선 응용은 캄캄한 밤에도 사진을 찍을 수 있는 '적외선 사진기술'인데 이는 더운 물체가 열을 발산할떄 일부를 적외선 꼴로 발산하는 현상을 이용한 기술이다.

• Proceedings of the Optical Society of Korea Conference
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• 2007.02a
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• pp.293-294
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• 2007

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.183-186
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• 1998

일반적으로 완벽한 Black이라 하는 것은 전 파장에 대해 고른 흡수를 보여야 하는바, 대부분의 Black염료들은 가시광선 전파장에 대해 고른 흡수를 보이지 못하고 있으며, 특히 650-720nm 부근의 장파장에서의 흡수율이 낮기 때문에 연색성이 낮다는 결점을 갖고 있다. (중략)

• Proceedings of the Optical Society of Korea Conference
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• 1996.09a
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• pp.5-5
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• 1996