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Isolation of Gibberellins-Producing Fungi from the Root of Several Sesamum indicum Plants
( Wha Youl Choi ),( Soon Ok Rim ),( Jin Hyung Lee ),( Jin Man Lee ),( In Jung Lee ),( Kang Jin Cho ),( In Koo Rhee ),( Jung Bae Kwon ),( Jong Guk Kim ) 한국미생물생명공학회 2005 Journal of microbiology and biotechnology Vol.15 No.1
In Vivo Assessment of Cosmetics and Developing Methods
( Min Youl Chang ),( Sang Wha Lee ) 한국피부장벽학회 2013 한국피부장벽학회지 Vol.15 No.1
Aged skin is characterized by a number of different signs, such as, wrinkles, dull skin, low skin elasticity, etc. Cosmetics are generally used to reduce such aging signs for healthy and beautiful skin. In order to properly express the functions of cosmetic products, objective evaluation methods must be established. Korea Food & Drug Administration regulates such laws regarding the efficacy of functional cosmetics (anti-wrinkle, skin whitening, SPF) and their proper expressions in advertisement. Recently, non-invasive imaging techniques have drawn great attention from researchers developing more objective evaluating methods. These methods include, in vivo confocal microscopy, multi-photon tomography, OCT, etc. Utilizing these advanced tools, our goal is to establish a more objective method for evaluating both the skin surface and inner skin.
The Novel Functional Chromophores Based on Squarylium Dyes
Soo-Youl Park*,Kun Jun,Sea-Wha Oh 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.3
Squarylium or squaraine dyes are derived from 1,2-dihydroxycyclobuten-3,4-dione, otherwise known as squaric acids. They are two principal types: the 1,2-bisdonorsubstituted derivatives, and the 1,3-bisdonor-substituted derivatives. The former are essentially merocyanines and have no distinctive properties, whereas the latter represent a unique type of chromophore, which is neither a merocyanines nor cyanine and has exceptional light absorption characteristics. They also have many functional applications based on their special properties. Thus it was the objective of this research project to synthesize a range of 1,3-squarylium dyes of widely differing structural types, and to investigate their light absorption and fluorescence properties in general, and the color change properties of appropriate examples in particular. Also in this study, the various pH-induced colour change processes were examined.
The Novel Functional Chromophores Based on Squarylium Dyes
Park, Soo-Youl,Jun, Kun,Oh, Sea-Wha Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.3
Squarylium or squaraine dyes are derived from 1,2-dihydroxycyclobuten-3,4-dione, otherwise known as squaric acids. They are two principal types: the 1,2-bisdonorsubstituted derivatives, and the 1,3-bisdonorsubstituted derivatives. The former are essentially merocyanines and have no distinctive properties, whereas the latter represent a unique type of chromophore, which is neither a merocyanines nor cyanine and has exceptional light absorption characteristics. They also have many functional applications based on their special properties. Thus it was the objective of this research project to synthesize a range of 1,3-squarylium dyes of widely differing structural types, and to investigate their light absorption and fluorescence properties in general, and the color change properties of appropriate examples in particular. Also in this study, the various pHinduced colour change processes were examined.