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1P-129 Selective Oxidation of Primary Hydroxyl Groups on Β-Cyclodextrin
송인준,정일두,유은경,황지원 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Cyclodextrins are a family of cyclic linked oligosaccharides consisting mainly of six, seven and eight glucose units. They have the remarkable property of complexing with a large variety of guest molecules in their hydrophobic cavity. Selective chemical modifications of the hydroxyl groups in order to prepare new compounds with specific properties are difficult due to the large number of hydroxyl groups in cyclodextrins. By using 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO), selective modifications on primary hydroxyl groups of β-cyclodextrins (β-CD) were described. In this study, the primary hydroxyl groups on β-CD were oxidized with the reaction of sodium hypochlorite, sodium bromide and catalytic amounts of TEMPO keeping pH at 10. The synthesized carboxy-β-CD was characterized by FT-IR, 1H-NMR, 13C-NMR spectroscopies.
영상데이터의 개인정보 영역에 대한 인공지능 기반 비식별화 기법 연구
송인준,김차종 대한임베디드공학회 2024 대한임베디드공학회논문지 Vol.19 No.1
This paper proposes an artificial intelligence-based personal information area object detection optimization method in an embedded system to de-identify personal information in video data. As an object detection optimization method, first, in order to increase the detection rate for personal information areas when detecting objects, a gyro sensor is used to collect the shooting angle of the image data when acquiring the image, and the image data is converted into a horizontal image through the collected shooting angle. Based on this, each learning model was created according to changes in the size of the image resolution of the learning data and changes in the learning method of the learning engine, and the effectiveness of the optimal learning model was selected and evaluated through an experimental method. As a de-identification method, a shuffling-based masking method was used, and double-key-based encryption of the masking information was used to prevent restoration by others. In order to reuse the original image, the original image could be restored through a security key. Through this, we were able to secure security for high personal information areas and improve usability through original image restoration. The research results of this paper are expected to contribute to industrial use of data without personal information leakage and to reducing the cost of personal information protection in industrial fields using video through de-identification of personal information areas included in video data.
Modified β-cyclodextrin With L-Ascorbic acid For Skin Whitening Agent
송인준,유은경,정일두 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
L-Ascorbic acid (AA) is one of the interesting and well known acids in nature which can be used in cosmetic, pharmaceutical, and food industry due to its bioactivity and anti-oxidation property. But the bioavailability of AA decreases with time because it is spontaneously oxidized in the presence of oxygen. Cyclodextrin (CD) which has hydrophobic inside and hydrophilic outside, can encapsulate various organic/inorganic molecules to form inclusion complex with hydrophobic compounds. Thus they can enhance the solubility and chemical stability of such compounds in aqueous solution, and finally increase the bioavailability. This study aimed to prepare the novel skin whitening agent including CD, which has better properties in skin permeation, whitening efficiency and duration time than existing product. AA was covalently bonded to β-CD using succinic anhydride (SAH) as a linkage, and characterized through FT-IR, NMR, MALDI-TOF, UV, respectively.