• 보존과학회지
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• 제33권5호
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• pp.355-362
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• 2017

순창 농소고분은 적성면 운림리 일대와 내월리 농소마을을 둘러 형성된 구릉지 능선에 위치하고 있다. 고분의 토광은 비교적 깊은 곳에 조성되어 도굴의 피해가 없었으며 전체적으로 다량의 숯으로 채워져 있어 목관이 비교적 좋은 상태로 출토되었다. 고분 구조 및 매장시설, 출토 유물, 방사선탄소연대 측정 결과를 종합하였을 때 농소 고분의 축조시기는 고려시대 후기부터 조선 초기까지로 추정하고 있다. 농소고분에서 출토된 목관은 목곽과 목관의 2중 구조로 목관 외면에 두껍게 옻칠을 하고 금색 문자와 흰색 문양으로 장식되었다. 안료 분석 결과 금색 문자는 금(Au), 흰색 문양은 은(Ag)이 주요 성분으로 확인되었다. 칠 막은 안료 층, 황갈색 층, 검은 층의 3개 층으로 관찰되었다. 검은 층은 그을음과 같은 검은 물질로 목재 바탕의 밑칠로 사용되었다. 황갈색 층은 옻칠로서 정제칠로 추정된다. 목관 칠막 분석을 종합하면 칠 제작방법은 금박을 이용하는 방법과 금분을 이용하는 방법으로 추정된다. 안료 형태 및 내부 구조상으로는 금박이 유력하지만 표현된 글자의 형태를 보면 금분을 이용한 것으로 보인다. 따라서 향후 금박과 금분을 이용한 재현실험을 통하여 제작방법을 확인한다면 고분 축조 당시 칠기 제작기술을 파악하는데 중요한 자료가 될 것이다.

• 보존과학회지
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• 제38권3호
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• pp.201-216
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• 2022

성산사에 봉안되어 있는 성주 이씨가(家) 초상화 중 2점(이조년, 이숭인)을 대상으로 사용재료 및 기법에 대한 과학적 분석을 실시하고, 그 데이터를 기반하여 최적의 모사복원방안을 설계하였다. 표현 기법 조사 결과, 두 진영 모두 선묘 위주로 표현되었지만, 신발과 눈동자, 육색 표현, 가채, 보강 흔적 등에서 차이를 보였다. 안료 분석 결과, 공통적으로 적색 안료는 주사와 연단의 혼합 혹은 유기 안료를 사용하였으며, 청색 안료는 석청을 사용했다. 녹색 안료는 석록(Malachite)이 사용되었고, 백색 안료는 연백을 사용했다. 황색 안료는 유기 안료와 금박이 사용된 것으로 추정된다. 이숭인 진영은 석간주와 녹염동광(Atacamite)도 사용되었다. 또한 동시대 사대부상과 비교한 결과, 두 초상화에서 당시 초상화 양식이 발견되나 변형된 특이점이 존재하였다. 과학적 분석 데이터를 기반으로 하여 이조년 진영은 고색복원모사, 이숭인 진영은 현상모사로 결정하였다. 육안으로 확인하기 어려운 표현 기법들을 과학적 분석 데이터로 보완하여 세부적인 채색 기법을 제시하였다. 또한 각 색상별로 초상화에서 대표적인 위치의 색도를 측정하여 평균값을 계산한 색상 기준값을 제시함으로써 유물의 현재 색상을 최대한 객관적 데이터를 근거로 하여 모사복원할 수 있도록 하였다.

• 약학회지
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• 제44권1호
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• pp.71-79
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• 2000

Curcumin, the yellow pigment in turmeric, curry and mustard, has anti-inflammatory and anti-carcinogenic activities. In this study; we investigated the hypocholesterolemic and anti-atherogenic effect of curcumin in rabbits. Hypercholesterolemia was induced by feeding high cholesterol diet to male rabbits for 30 days, and the animals were then fed high cholesterol diet containing 0.1% (w/w) or 0.5% (w/w) curcumin for additional 30 days. Supplementation of 0.l% curcumin tended to lower serum total cholesterol and low density lipoprotein (LDL)-cholesterol levels and inhibit serum lipid peroxidation. In the 0.5% curcumin-supplemented group, serum total cholesterol was significantly lowered by 11.7%, LDL-cholesterol by 12.8% and lipid peroxidation by 47.9% compared to the control group. Hepatic cholesterol and triglyceride contents were also significantly lowered by 50.6% and 37.4%, respectively compared to the control group. Lipid staining of the arteries isolated from the curcumin-treated rabbits showed that curcumin significantly decreased formation of fatty streaks and atheromatous plaques on the intima of the arteries. These results demonstrated that curcumin lowered serum cholesterol concentration, hepatic cholesterol and triglyceride contents, and accumulation of cholesterol in the artery These cholesterol lowering effects of curcumin, together with its anti-oxidative and anti-inflammatory activities, may play some important roles in preventing atherosclerosis.

• 한국가구학회지
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• 제26권1호
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• pp.31-50
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• 2015

This study analyzes traditional form and figurative characteristics of Ottchil Painting based on objective relics about long lasted Ottchil Painting and related literature as our country's national culture. Study range is among Lolang (Nangnang), Three Kingdom Dynastys (Koguryo, Baekje and Shilla), Unified Shilla Dynasty, Koryo Dynasty, Joseon Dynasty, Modern times and Contemporary. The method of study is after theoretical consideration of Ottchil Painting through related literature, adduced figurative characteristics of related Ottchil Painting by time period with case-study methods such as excavated relics and historical basis. Ottchil Painting consists of color, which is derived from Ottchil mixed with a mineral pigment of powder and various patterns and drawings using different techniques. The methods of Ottchil Painting are Myohoi, Yanggam, Gakhoik, Younma, Balsoa and Toiso. The techniques of Ottchil Painting of our country is established by splendid and unique for about 1,600 years revolved around Myochilchaehoi technique and Myoyuchaehoi technique started at Unified Shill a Daynasty and through Koryo, Joseon Dynasty, Modern times and Contemporary. Also, such this Ottchil Painting form of red in the inside and black in the outside, which is wood based, the rest is bamboo sheath and framework from Geonchil based and the figurative characteristics presented the traditional Patterns of Lotus, Phoenix, arabesque, bird, animal, cloud, marble and letter with red Ottchil, yellow Ottchil, or five colors Ottchil.

• Journal of Microbiology and Biotechnology
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• 제29권12호
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• pp.1925-1930
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• 2019

Carotenoids are organic pigments with antioxidant properties and are widespread in nature. Here, we isolated five microbes, each forming yellow-colored colonies and harboring C₃₀ carotenoid biosynthetic genes (crtM and crtN). Thereafter, Lactobacillus plantarum subsp. plantarum KCCP11226, which showed the highest carotenoid production, was finally selected and the produced pigment was identified as C₃₀ carotenoid 4,4'-diaponeurosporene. This strain exhibited the highest survival rate under oxidative stress and its carotenoid production was also enhanced after exposure to 7 mM H₂O₂. Moreover, it showed the highest ability to scavenge DPPH free radical. Our results suggested that L. plantarum subsp. plantarum KCCP11226, which produces 4,4'-diaponeurosporene as a natural antioxidant, may be a functional probiotic.

• 한국의류학회지
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• 제8권3호
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• pp.1-7
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• 1984

Traditionally dyeing fabrics with pigment extracted from carthamus flower was a popular method of obtaining red color in Korea. Such a method existed in several countries throughout the world before the synthetic dyestuff was developed. However, the traditional procedures of using natural products in obtaining colored materials are completely forgotten in modern Korea. The details of dyeing procedures fare not well documented in literature, either. In this study the method of extracting and dyeing with carthamus flower is reconstructed from Korean literature and actually carried out in laboratorf. The reconstructed method is compared with those of Japan, China, France, and Egypt, and the scientific basis of such an ancient tradition is discussed. Carthamus contains two kinds of coloring components : yellow carthamin and red carthamone. Water-soluble carthamin is first extracted by repeated washing and is usually used for the initial soaking procedure. Then carthamone is extracted in alkali solution by adding ashes of dried plants such as carthamus stalks and bean hull. Finally the solution of carthamone is made acidic by adding schizandra juice for dyeing on fabrics.

• 한국재료학회지
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• 제27권2호
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• pp.82-88
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• 2017

Ink-jet printing techniques with ceramic ink, which contains ceramic pigments as colorant, are in increasingly use in the ceramic industry. Generally, ceramic pigments that are produced by conventional method show diameters of several micrometers; these micrometer sized particles in the ink-jet printing process can cause undesirable behavior such as print head nozzle clogging. To prevent this problem, a particle size reduction process is required. In this study, CMYK (cyan, magenta, yellow, black) pigments were synthesized via solid state method. Each pigment particle was milled to submicron size by an attrition mill. The effects of micronizing on the morphology, mechanical property, crystal structure and color property of the CMYK ceramic pigments were investigated by field emission scanning electron microscopy (FE-SEM), particle size analysis (PSA), X-ray diffraction (XRD) and CIE $L^{\ast}a^{\ast}b^{\ast}$.

• 한국미생물·생명공학회지
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• 제22권6호
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• pp.607-613
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• 1994

The Bacillus stearothermophilus arfI gene encoding a-arabinofuranosidase was isolated from the genomic library, cloned into pBR322, and subsequently transferred into the Escherichia coli HB101. The recombinant E. coli was selected from approximately 10,000 transformants screened by making use of its ability to produce a yellow pigment around the colony on the selective medium supplemented with p-nitrophenyl-$\alpha$-L-arabinofuranoside (pNPAf), a chromogenic substrate. The functional clone was found to harbor a recombinant plasmid, pKMG11 with an insertion of about 5 kb derived from the B. stearothermophilus chromosomal DNA. Identity of the arfI gene on the insert DNA was confirmed by a zymogram with 4-methylumbelliferyl-$\alpha$-L-arabinofuranoside as the enzyme substrate. The $\alpha$-arabinofuranosidase from the recombinant E. coli strain showed very high substrate specificity; the enzyme displayed high activity only with pNPAf among many other p- or $o$-nitrophenyl derivatives of several sugars, and acted only on arabinoxylan among various natural arabinose containing polysaccharides tested.

• Molecules and Cells
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• 제39권10호
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• pp.750-755
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• 2016

Although innate color preference of motile organisms may provide clues to behavioral biases, it has remained a longstanding question. In this study, we investigated innate color preference of zebrafish larvae. A cross maze with different color sleeves around each arm was used for the color preference test (R; red, G; green, B; blue, Y; yellow). The findings showed that 5 dpf zebrafish larvae preferred blue over other colors (B > R > G > Y). To study innate color recognition further, tyrosinase mutants were generated using CRISPR/Cas9 system. As a model for oculocutaneous albinism (OCA) and color vision impairment, tyrosinase mutants demonstrated diminished color sensation, indicated mainly by hypopigmentation of the retinal pigment epithelium (RPE). Due to its relative simplicity and ease, color preference screening using zebrafish larvae is suitable for high-throughput screening applications. This system may potentially be applied to the analysis of drug effects on larval behavior or the detection of sensory deficits in neurological disorder models, such as autism-related disorders, using mutant larvae generated by the CRISPR/Cas9 technique.

• 한국식품과학회지
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• 제21권3호
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• pp.453-459
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• 1989

산업용 다당류의 개발을 목적으로 고점도의 다당류생산 미생물을 토양으로부터 분리하였다. 본 세균은 동정한 결과 Pseudomonas mendocina로 생각되었다. 본 세균이 생산하는 다당류는 o-acetyl기를 함유한 ${\beta}-glucan$으로 추정되며 구성당으로서는 포도당과 람노오스가 몰비로 2.2 : 1.0 구성으로 되어 있고 수용액은 의가소성 유체이다. 1% 용액은 428mPa.s의 점도를 나타내며 항복치는 8.89Pa이다. 이 용액은 열안정성은 없으며 pH 안정성과 염안정성은 있었다. 유동활성화에너지는 6.57 Kcal 이다.