• 한국의류학회지
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• 제37권5호
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• pp.676-690
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• 2013

This study explored the historical meaning and the present practices of Indonesian batik. Relevant literature was reviewed first; subsequently, interviews and observations were conducted to achieve the purpose of the study. Historically, batik was an integral part of the Javanese court art as well as a representation of each regional culture. Batik also became an important means to reveal a national identity in postcolonial Indonesia in the 1950s. There exist two types of traditional and modern type batik in present Indonesia. The traditional batik refers to batik tulis, batik cap, and the combination of tulis and cap. The modern batik is comprised of a batik print as well as the combination of the print and the traditional batik. The traditional batik was practiced at the small-sized village batik workshops and in the government batik research center. A few batik workshops often co-operate with modern screen print factories; however, the use natural dyes for the dyeing of batik cloth is rarely found. Batik was used for varied objects made from fabric materials that include clothing, small fashion items, living supplies and furniture, as well as fine art such as paintings and wooden crafts.

• 한국염색가공학회지
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• 제10권1호
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• pp.1-10
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• 1998

The objectives of this study were to investigate the effects of mordants and dyeing method : on the dyeability and color fastness of the fabrics with the extract from Gardenia. The following results were drawn from the data obtained. 1. The wavelengths of the strongest absolution bands of Amur cork tree, Gardenia extract was 440nm respectively and the wavelengths 440-460nm after the mordants were added in the color extracts(The bands of Gardenia extract shifts to short wavelength side as pH increased.). In all cases, the abosorbancies were increased. 2. The main color substances in extract from Gardenia were expected to be cretin respectively by spectrophotometric and HPLC studies. 3. As to the concentration of color extract for dyeing, about 20g/L was the optimum concentration to dye silk and cotton fabrics with extract. 4. For silk and cotton fabrics dyeing with Gardenia extract, $SnCl_2$ was the best mordants. The K/S values of dyed fabrics were increased gradually as the concentration of mordants increased, and the highest K/S values were obtained at 5-10%. When using the mordanting methods, silk fabric by premordanting and cotton fabric by synmordanting had a greater effect K/S value. 5. The color fastness of fabrics dyed with Gardenia extract against dry cleaning, washing, rubbing and perpiration was improved 1 level or so but light fastness was remained 1 level showing without any effect.

• 한국염색가공학회지
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• 제10권1호
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• pp.11-19
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• 1998

For the purpose of standardization and practicability of dyeing by natural dyes, the mordanting and dyeing properties of cochineal and carminic acid were studied. Appropriate extraction, dyeing and mordanting condition of cochineal were determined, and the effect of mordanting method on dye uptake and color fastness of dyed fabric was investigated. The maximum absorbance of cochineal solution was 495nm, carminic acid was 533nm and 577nm. The color of carminic acid solution was affected by pH 6~9. The optimum temperature to extract cochineal was $80-100^\circ{C}$ and dyeing solution for 1 hour. And effective dyeing time to silk was 60min. Effective mordanting temperature was $80^\circ{C}$, and its time was 30min. In case mordants concentration, the maximum absorbance of Sn solution was 3%, K, Cu and Cr were in 1%. K/S value of dyeing fabrics was recoginazed by mordant treatment, specially Fe, Sn, Al, Cu. In the case of cochineal light fastness was increased by mordant treatment, specially Fe treatment. Perspiration fastness was good in acidic solution than in alkaline solution and perspiration fastness of cochineal was poor. Fastness of abrasion and dry-cleaning were good and these fastness improvement were generally effective for post-mordanting treatment.

• 한국의류학회지
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• 제27권1호
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• pp.60-66
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• 2003

This study shows the colorfastness, antibacterial activity, and deodorizing effect about cotton and silk fabrics dyed with Lithospermi Radix Extract. In the case of colorfastness, the light colorfastness showed the lowest grade, the other colorfastness was relatively good. However there are some differences according to fabrics and mordants. In the case of antibacterial activity to Staphylococcus aureus, the cotton fabrics had the most antibacterial effect at the dyed fabrics that had been mordanted SnC1$_2$ㆍ2$H_2O$, and the silk fabrics had the most antibacterial effect at the dyed fabrics that had been mordanted A1($CH_3$COO)$_3$. In the case of deodorizing effect, the cotton fabrics showed the most deodorizing effect at the dyed fabrics that had been mordanted SnC1$_2$ㆍ2$H_2O$, and the silk fabrics showed the comparatively high antibacterial effect at the dyed fabrics that had been mordanted both SnCl$_2$ㆍ2$H_2O$ and Al($CH_3$COO)$_3$.

• 복식
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• 제56권6호
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• pp.87-95
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• 2006

This is a study regarding the development of Cultural Products with Applied Koguryo Wadang Patterns. The objective of this study is in developing unique Cultural Products which combine traditional Korean images with modern feel by utilizing Koguryo Wadang patterns. The among Korean traditional patterns which implicit the sense of beauty and modeling, chose and investigated the Wadang patterns of the Koguryo. And from it, studied about the originality and characteristics of the Koguryo Wadang patterns. In this characteristics of the Wadang pattern, the representative lotus design pattern was based and reorganized to fine the probability of the modern expression using traditional patterns. After design plans were made for each works, natural dyes were used to dye(dip dyeing, printing) the fabrics(cotton:Kwang-mok) by theme. Approximately 16 pieces of Cultural Products that can be used in daily life were created using Koguryo Wadang patterns, including Traffic or credit card cases, Name card cases, Pouches, CD cases, Cushions, Bags, Purses, Vest, Muffler. In addition, the increased quality of the products will be a competitive edge in the world market where products compete with no national bounds.

• 한국염색가공학회지
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• 제7권4호
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• pp.16-24
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• 1995

Traditionally dyeing fabric with dyestuff extracted from Indigo was a popular method of obtaining blue color in the world before synthetic dyestuff was developed in the 1890's. As the Korean traditional process of dyeing extracted from Indigo, there are two kinds of dyeing process; The deposite dyeing of muddy Indigo and the leaf dyeing of Indigo plant. In order to study the properties of leaf dyeing of Indigo, the dyeing properties, color difference on cotton and silk fabrics under several dyeing conditions were investigated. In the dyeing of cotton and silk fabrics with leaf dyeing of Indigo, the dyeing affinity of silk was higher than that of cotton, the cotton and silk fabrics were dyed dark yellowish Green and dark Blue, respectively. the dye uptake increased with the increase of dyeing temperature and of the unmber of dyeing times. When cotton and silk fabrics dyed with leaf dyeing of Indigo at 6$0^{\circ}C$ for six number of times, the K/S value of dyed cotton and silk were calculated 1.286, 2.613 respectively.

• Molecules and Cells
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• 제42권2호
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• pp.104-112
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• 2019

Tracking the fate of individual cells and their progeny through lineage tracing has been widely used to investigate various biological processes including embryonic development, homeostatic tissue turnover, and stem cell function in regeneration and disease. Conventional lineage tracing involves the marking of cells either with dyes or nucleoside analogues or genetic marking with fluorescent and/or colorimetric protein reporters. Both are imaging-based approaches that have played a crucial role in the field of developmental biology as well as adult stem cell biology. However, imaging-based lineage tracing approaches are limited by their scalability and the lack of molecular information underlying fate transitions. Recently, computational biology approaches have been combined with diverse tracing methods to overcome these limitations and so provide high-order scalability and a wealth of molecular information. In this review, we will introduce such novel computational methods, starting from single-cell RNA sequencing-based lineage analysis to DNA barcoding or genetic scar analysis. These novel approaches are complementary to conventional imaging-based approaches and enable us to study the lineage relationships of numerous cell types during vertebrate, and in particular human, development and disease.

• 분석과학
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• 제35권4호
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• pp.153-160
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• 2022

A green spectrophotometric method for the determination of cyanide has been proposed using, a green reagent, aqueous extract of blue butterfly pea. The test tube was filled with anthocyanin rich extract (pH 6) and cyanide solution. The reaction was kept constant for 10 minutes at room temperature. The reaction mixture changed color from blue to green as the amount of CN-ions increased. The 620 nm peak intensity increased with CN concentration. Therefore, this wavelength was used for all cyanide analyses. The cyanide calibration curve had a linear range of 0.25-1.00, 1.00-4.00, and 4.00-10.00 mg/L, with a satisfactory correlation coefficient of 0.99 and a LOD of 0.57 mg/L. The recovery ranged from 8.33 to 76.94 percent, indicating that this method is inaccurate at low cyanide concentrations. The intra-day and intermediate precision relative deviations were 0.391-0.871 % and 1.112-1.583 %. An H-bond forms between the C-4 group of the B-carbonyl ring and the HCN molecule according to the B3LYP/TZVP calculation. The method is convenient for cyanide concentrations above the LOQ of 1.09 mg/L, cost-effective, and capable of reducing toxic solvents with acceptable precision. The method could also be used to detect total cyanide in biological, environmental, and industrial waste samples.

• Journal of Electrochemical Science and Technology
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• 제15권2호
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• pp.276-290
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• 2024

A study of the transition from transitory state to steady state in DSSCs based on natural dyes is presented; cochineal was used as dye and Li⁺, Na⁺, and K⁺ were the ions added to the electrolyte. The photocurrent profiles were obtained as a function of time. Several DSSCs were prepared with different cations and their role and the transitory-to-steady transition was determined. A novel hybrid charge carrier source model based on the Heaviside function H(t) and the Lambert-Beer law, was developed and applied to analysis of the transient response of the output photocurrent. Additionally, the maximum effective light absorption coefficient α and the electronic extraction rate κ for each ion were determined: ${\alpha}_{Li^+,Na^+,K^+}\,=\,(0.486,\,0.00085,\,0.1126)\,cm^{-1}$, and also the electronic extraction rate ${\kappa}^{Li^+,Na^+,K^+}_{ext.}\,=\,(1410,\,19.07,\,19.69)\,cm\,s^{-1}$. The impedance model using Fick's second law was developed for carrier recombination to characterize the photocurrent.

• 한국의류학회지
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• 제36권3호
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• pp.324-334
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• 2012

In this research, the dyeing properties of $Lycopus$ $lucidus$ Turcz on cotton and silk fabrics were evaluated to establish a scientific database of natural dyes. The optimum dyeing conditions were identified with K/S values depending on the dyeing concentration, temperature, time, and pH. For the optimum conditions, the color changes for different synthetic mordants were observed as L, $a^*$, $b^*$ and H, V, C. The color fastness after dyeing and mordanting was also examined. Additionally, the antibiosis of $Lycopus$ $lucidus$ Turcz was examined. The results were as follows: For the cotton, the optimized dyeing conditions were 300% (o.w.f.), $50^{\circ}C$, 40 min., and pH 5. For the silk fabric, the conditions were 450% (o.w.f.), $70^{\circ}C$, 60 min., and pH 4. The K/S value of dyed cotton improved about 1.03-2.78 folds after mordanting. The fabric color was yellow in the absence of mordanting, while it was reddish yellow after post-mordanting with FFC. Although the color changed with the mordanting method and mordant, the overall hue was yellow. Thus, $Lycopus$ $lucidus$ Turcz appears to have the potential for use as a natural dyeing material for a yellow hue. The K/S value of the dyed silk fabric improved about 1.05-1.40 folds after mordanting. The fabric showed a reddish yellow color when pre-mordanted with Al and Cu. The washing and dry-cleaning fastness of the cotton and silk fabrics were at the 4-5 level. The light fastness of the cotton improved after mordanting; however, pre-mordanting was more effective than post-mordanting or the absence of mordanting. The dyed cotton, silk fabrics showed excellent antibiosis.