색상 측정 기기를 이용한 복합레진 적층 수복과 단일 수복의 색상 비교 분석

송영상,김자현,이빈나,장지현,장훈상,황윤찬,오원만,황인남 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2

Objectives: This study analyzed the difference in color caused by different thickness in enamel layer of composite resins when applied with single and layering placement technique, and evaluated if the results agreed with the shade guide from the manufacturers to verify reliability of the color matching process of the manufacturers. Materials and Methods: For single composite resin samples, 6 mm diameter and 4 mm thickness cylindrical samples were fabricated using Ceram-X mono (DENTSPLY DeTrey) and CIE L*a*b* values were measured with spectrophotometer. Same process was done for layering compositie resin samples, making 3 dentinal shade samples, 4 mm thickness, for each shade using Ceram-X duo (DENTSPLY DeTrey) and enamel shade resins were layered in 2 mm thickness and CIE L*a*b* values were measured. These samples were ground to 0.2 mm thickness each time, and CIE L*a*b* values were measured to 1 mm thickness of enamel shade resin. Results: Color difference (△E*) between single and layering composite resin was 1.37 minimum and 10.53 maximum when layering thicknesses were between 1 mm and 2 mm and 6 out of 10 same shade groups suggested by manufacturer showed remarkable color difference at anythickness (△E* > 3.3). Conclusion: When using Ceram-X mono and duo for composite resin restoration, following the manufacturer's instructions for chossing the shade is not appropriate, and more accurate information for Ceram-X duo is needed on the variation and expression of the shades depending on the thickness of the enamel. (Restor Dent Endod 2012;37(2):84-89)

산포도와 머루중의 Polyphenol Oxidase에 관한 연구¹

성찬기,박희중,임흥빈,조성희 中央大學校 基礎科學硏究所 1997 基礎科學硏究所 論文集 Vol.11 No.-

Polyphenol oxidase was partially purified from fresh vitis flexuosa and vitis amurensis and its characteristics were studied. the experimental results were summarized as follows. 1.The enzyme activities were increased during the fruit developement gradually in two sample. 2.The optimum pH and temperature for activity were 5.5 and 30℃, respectively. 3.The enzyme was active with o-phenols and trihydroxyphenol, but inactive toward m-diphenols and monophenols. 4.The ?? value of the enzymes was 15.4 mM in vitis flexuosa and 12.5 mM in vitis amurensis with catechol as substrate. 5.Inhibitors sudies indicated that sodium diethyl-dithiocarbamate, L-cysteine, sodium bisulfite, L-ascorbic acid and 2-mercaptoeyhanol were the most potent. 6.The enzyme activity increament by ?? was much better than those by the other metal ions.

고추장 숙성 중 품질 변화와 초고압처리에 의한 α-amylase 활성 변화

임상빈,좌미경,김봉오 제주대학교 생명과학연구소 2000 제주생명과학연구 Vol.3 No.-

Qualily changes in pH, titratable acidity and amino nitrogen of Kochujang were measured during the period of fermentation. α-amylase activity was also determined in Kochujang treated with ultra-high pressure. Initial pH of Kochujang was 5.05. There was a little decrease after 10 days of aging and then drastic change occurred. It reached 4.74 after 80 days. Titratable acidity of Kochujang just after preparation was 11.8 mL per l0g of Kochujang and then increased rapidly. It was 15.2 mL after 80 days. Amino nitrogen was increased significantly from 90.0 to 114.9 mg% after 10 days of aging. It increased as the increase of aging period and then reached 160.7 mg% after 80 days of fermentation. α-amylase activities decreased as the increase of treatment pressure, temperature and time. During storage at 37℃, α-amylase activities of all samples regardless of treatment conditions decreased significantly after 45 days, and then increased gradually.

α-및 β-염화나프탈렌술포닌과 α-나프틸아민과의 반응에 대한 용매효과

한성빈 濟州大學校 基礎科學硏究所 1988 基礎科學硏究 Vol.1 No.1

α-, 및 β-염화나프탈렌술포닐과 α-나프탈아민과의 반응에 대한 유사일차반응속도 상수를 여러 종류의 용매에서 구하고 그 결과로부터 반응성과 용매효과를 논의하였다. 순수 아세토니트릴용매 속에서의 반응속도상수는 양성자성용매계에서 보다 작게 관측되었다. 피리딘의 경우에서는 유사일차 반응속도상수가 아세토니트릴용매계에서 크게 관측된 것과 비교해 볼 때 용매효과보다 친핵체의 영향이 크게 작용할 것으로 예상된다. Taft의 용매파라미터 α-π값과 좋은 직선관계가 성립됨을 볼 때 반응은 용매의 용질분자에 대한 수소결합성 능력과 극성이 동시에 작용함을 알 수 있었다.

差別的 職務設計를 위한 接近模型

李相彬 全北大學校 1983 論文集 Vol.25 No.-

The essential concepts of the present model for differential job design are individual differences, enlarging jobs of corresponding with worker's growth need and situations for the job enlargement changes, gradual and step-by-step attempts of the job enlargement changes, to form dyadic relationship between leaders and their members, plotting for effects of overpaying low growth need employees, and to apply such general practices for influencing work beharior as MBO and PDM. The present job design approach of applying these concepts has three dimensions(jop dimensions: simple, routine jobs-complex, creative jobs; work characteristics dimensions: blue-collar-white-collar; and individual difference characteristics dimensions: high-low growth need employees), and according to these dimensions job design situations is classified eight classes. Butthat design jobs to be applied each class are not completely exclusive and not entirely different each other. Rather each class is tied with inclusively. The present job design approach has the sufficient theoretical and empirical backgrounds of the related theories and field studies. Thus, in the present paper, I intend to build model. And the empirical approach to the present job design model will be followed by the field studies later on.

廢Ni觸媒로부터 Nickel yellow의 製造에 관한 硏究

김성빈,구철회 釜山工業大學校 1983 論文集 Vol.24 No.2

NiNH₄PO₄was Prepared from waste Ni catalyst used in hydrogenation of oil and fat. NiNH₄PO₄was calcined at different temperature respectly 800, 1000, 1100℃ to prepare Nickel yellow. The results from this experiment are summerized as follows: 1) Nickel yellow formed at 1100℃ was most clearness yellow color from color analyzer data. 2) Nickel yellow was consist of α-Ni₂P₂O??, Ni₃(PO₄)₂from X-ray diffraction analysis. 3) The endothermic pick at 100℃ and exotherwic pick about 1050℃ on calcination of NiNH₄PO₄were checked in DTA (difference thermal analysis data.)

Diphenylhydantoin이 배양중인 치은 섬유아세포에 미치는 영향

임성빈,이재현 단국대학교 치의학연구소 1991 논문집 Vol.3 No.-

The purpose of this study was to evaluate the effect of diphenylhydantion on humna gingival fibroblasts in culture. Cell proliferation assay was performed to determine the effect of PHT on the DNA synthesis rate of human gingival fibroblasts by means of [^3H]-thymidine incorporation method. Protein synthesis assay was designed to detect the collagen production by [^3H]-proline incorporation method. The results were as follow : 1. In case of DNA synthesis assay, the contents of DNA were significantly increased more than the control group(1 ㎍/ml : p<0.05, 5 ㎍/ml, 10 ㎍/ml : p<0.01). 2. In case of collagenase-digestible protein synthesis assay, the contents of CDP were significantly increased on PHT 5 ㎍/ml group compare to the control group(p<0.05), and PHT 1 ㎍/ml, 5 ㎍/ml group were increased but there were statistically not significant. 3. In case of noncollageneous protein synthesis assay, the contents of NCP were significantly increased on PHT 1 ㎍/ml group(p<0.05), and PHT 5 ㎍/ml, 10 ㎍/ml group were increased but there were statistically not significant. 4. The ability of collageneous-digestible protein synthesis was great increased than the cell proliferation. 5. The effects of PHT increasing the ability of collagen synthesis, were cell proliferation and increased of protein synthesis.

히스토그램 피크 매칭을 이용한 사인 인식 시스템

박정빈,황재문,정성환 國立 昌原大學校 精報通信硏究所 1998 精報通信論文集 Vol.2 No.-

Most of previous signature recognition method mainly used 8 direction chain code, starting point and separated point to recognize signs. In this paper, we propose a signature recognition system using histogram peak mathing. First, for efficient recognition, the proposed system binarizes and normalizes obtained sign images, and then only sign area is extracted. Next, as input data of ART2, the histogram peaks of x and y axis are used. In the experiment using 40 sign images, the proposed system shows about 88% recognition rate.

비만도에 따른 최대지방연소를 위한 운동강도 설정에 관한 연구

서상진,박수연,박철빈 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-

In order to provide the basic data required for an effective physical exercise program to get rid of obesity, women in their 20s to 50s who had never participated in a regular physical exercise were classified into GroupI, GroupII, and GroupIII consisting of 10 persons each with 25 to 30%,34 to 35%, and over 36% of body fat rate respectively, and then they were checked up with their maximum physical exercise intensity by using RAMP II protocol to analyze relations of physiological causes of change at the time of the maximum fat oxidation intensity for the three groups with the result of analysis as follows, 1.Maximum fat oxidation and fat -free weight(r=.396, p〈.03), oxygen uptake(r=.569, p〈.001) and ruts piratory exchange rate(r=.673, p〈.000) have notable co-relations one another. 2.At the time of the maximum fat oxidation intensity, oxygen uptake, heart rate, respiratory exchange rate, fat oxidation, and energy consumption among the 3 group have shown no notable statistical difference one another. 3.At the time of the maximum fat oxidation intensity, percentage in the maximum oxygen uptake value(% VO2max) shows a notable difference among the three groups. A post verification shows GroupIII has a notable difference from GroupI or GroupII(p〈.05) while there is no notable difference between GroupII and GroupI. In conclusion at the time of the maximum fat oxidation intensity, GroupIII(body fat rate of over 36%) shows a notably high relative intensity. Accordingly people of high body fat rate need the tensity of 60% VO2max in aerobic exercise to reduce their fat.

캡슐소재에 따른 멸치어유의 미세캡슐화

임상빈,좌미경,송대진 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.1

Microencapsulation of anchovy oil with different wall materials such as sodium alginate. chitosan and β-cyclodextrin was investigated. Microencapsulation was accomplished by ejecting an oil/water emulsion into a dispersion fluid under high pressure through an orifice. As a dispersion fluid, 0.2% calcium lactate was appropriate for sodium alginate, while 0.18 sodium hydroxide for chitosan in terms of capsule size and distribution, and emulsion stability. β -cyclodextrin formed inclusion complex with anchovy oil. The microcapsules were stored at 22 and 30℃ for 8 days, and their stability was tested. The acid value remained unchanged and the peroxide value was not detected.