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장문식,정욱순,이선미,남태규,박종일,강명화,김대옥,황재성,엄석현 한국원예학회 2014 Horticulture, Environment, and Biotechnology Vol.55 No.2
Safflower sprouts were grown under different light frequencies and conditions, including fluorescent whitelight, red LED or blue LED light and darkness. The sprout extracts were tested for their inhibitory effect on melaninsynthesis. Two compounds from safflower sprout extract were isolated and tested for their activities. Safflower seedswere sown in growth chambers set to lights and harvested at 9 days after sowing. Methanolic extracts of safflowersprouts were subjected to melanin synthesis inhibitory effect on MTT [3-(4,5-Dimethylthiazol-2-yl)-2,5-DiphenyltetraxoliumBromide] and melanin bioassay methods with a dose dependent manner. Two compounds were identified by usingopen column chromatography and LC-MS (liquid chromatography-mass spectrometry) analysis. The MTT and melaninbioassays with the identified compounds were conducted. Darkness or fluorescent white light irradiation induced extractswith inhibitory effects on melanin synthesis (in a dose dependent manner). In contrast, blue light induced extracts toslightly increase melanin synthesis. It was found that 8-hydroxyarctigenin, a compound isolated from the safflower sproutsgrown under fluorescent white light for 9 days after germination, induced inhibitory effect of melanin synthesis. Thecompound was contained more in the darkness or fluorescent white light treatment than others. Safflower sprouts grownunder dark or fluorescent white light conditions were more effective on inhibiting melanin synthesis than conditions underred or blue light. An active compound, 8-hydroxyarctigenin, may be a useful whitening agent in cosmetic resources.
장문식(Mun-Sik Jang),심상목(Sang-Mok Sim) 한국관세학회 2015 관세학회지 Vol.16 No.4
Korea Black Friday, k-Discount day order to transform into the country to purchase foreign direct, more large discounts to an event and price the seller has not allowed to execute a fraud Preparation and related institutions should a ban. Now Day sale to Korea Black Friday, k-Discount day inducing domestic price, promotions and discounts at from direct to buyers switched to domestic consumption Will be made. This study helps direct analysis check and causes, direct buyers for the purchase raised the need to switch to domestic procurement, and switch between them to seekDid. A future sale price factors such as the opinions of survey and generators business from sales of corporate and consumer opinions and analyze the need to.
장문식,이규용 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2
Hard coating on cutting tools have become an imteresting research area in mechanical engineering. Thin film of titanium nitride(TiN) has beem used to extend tool life using its high hardness, wear resistance and high melting point. This film material can be prepared usually by CVD or PVD, but CVD involves high temperature processing and low deposition rate, Dual ion beam(DIM) deposition, a simultaneous process of sputter deposition and ion beam assist, is a movel technique for achieving excellent film properties with enhanced adhesion to the substrate. TiN films hace been prepared on the WC insert tip using DIB deposition techniqe. The effects of processing parameters such as N/Ti arrival ratio and ion beam crrent to the crystal structures and mechanical properties of the films were investigated. XRD analysis indicated that the crystalline structure of the TiN films was changed from amorphous phase forr N/Ti ratio of 0.5 to TiN(200) for high N/Tiratio of 1.0. The lowest wear rate of the film was obtained with N/Ti ration of 1.25 and ion beam current of 0.6 mA whih showed both high hardness and good adhesion to the substrate.