• Journal of the Korean Electrochemical Society
• /
• v.17 no.1
• /
• pp.57-64
• /
• 2014

Carbon electrodes for capacitive deionization were fabricated through mixing two different carbon powders (activated carbon powder, carbon black) with different particle sizes to investigate physical or electrochemical properties and finally desalination performances of the electrodes with various compositions of two carbon powders in weight and were compared with the electrode consisting of activated carbon. As a result, the electrode structure became more packed as increasing the amount of carbon black and resulted in 10% increase in mesopore fraction. The specific capacitance obtained from cyclic voltammograms of various electrodes showed that the electrode containing carbon black only had 107.4 F/g, while the specific capacitance of the electrode having more amount of carbon black increased and was higher than the one having no carbon black. The results of desalination runs in a capacitive deionization cell exhibited that the electrode having the highest amount of carbon black (1 wt%) in this study had the highest desalting efficiency, and no significant pH variation was observed during the runs. It was analyzed using accumulated charge that the fraction of non-Faraday current increased as the amount of carbon black increased in the electrodes. It can be concluded that the addition of carbon black changed the electrode structure resulting in an increase in the fraction of mesopore and finally enhanced the desalting efficiency by decreasing Faraday current.

• Magazine of the Korean Society of Agricultural Engineers
• /
• v.21 no.1
• /
• pp.78-85
• /
• 1979

In order to obtain the basic data for designing optimum flat plate solar air heaters, which can be operated with relatively low temperature for drying farm products, 8 different treatment of solar air heaters were devised and tested for their heating performances and efficiencies. The results were analised and summarized as follows. 1. The primary factors, structure of air path (C), black coating materials (A) and bottom coating methods (B) showed very high significant effect of far above 1% level. With respect to the mutual multiplying effect of secondary factors, 1% level of significance was found with coating materials and methods (AB), and 5% level of significance was found with coating materials and air path structure (AC). 2. The heating performance of the air heaters with winding air path showed about twice those with straight air path. 3. The Korean black ink which is less expensive than dim oil paint showed 3-4% better heating efficiencies as the black coating material of flat plate solar air heaters. 4. The heating efficiencies of the solar air heaters whose bottoms were not black coated were 2-3% higher than those with black coated bottoms. 5. The highest heating efficiency of solar air heater among 8 different treatment was found in the plot of Korean black ink-bottom not coated-winding air path showing 29.0-34.5%

• Korean journal of food and cookery science
• /
• v.21 no.3 s.87
• /
• pp.346-353
• /
• 2005

CThis study used HPLC to analyze the contents of 7 kinds of catechins, 4 kinds of theaflavins, and 2 kinds of methylxanthines in the following 6 kinds of commercial Korean tea: 2 green, 2 black, 1 jasmine and loolong. The following ranges in the 13 tea components of the 6 samples by ethanol extract were evaluated in mg/g: (-)-epigallocatechin, 0(black tea and jasmine tea) to 14.19(green tea); (-)-catechin 0; (+)-epicatechin, 0.62(bran rice-green tea) to 2.91(black tea); (-)-epigallocatechin gallate, 4.59(black tea) to 43.96(jasmine tea); (-)-gallocatechin gallate, 0.58(black tea) to 5.80(jasmine tea); (-)-epicatechin gallate, 5.63(bran rice-ueen tea) to 48.06(jasmine tea): (-)-catechin gallate, 0.26(black tea): theaflavif 0 to 3.66(black tea): theaflavin-3-gallate, 0 to 6.94(black tea): theaflavin-3'-gallate, 0 to 4.01(black tea); theaflavin-3,3-digallte, 0 to 10.25(black tea); caffeine, 4.60(bran rice-peen tea) to 26.44(black tea); and theobromine, 0.10(bran rice-green tea) to 1.81(jasmine tea). The contents of all components were lower by water extract than by ethanol extract. Therefore, total catechin (100.55, 45.88 mg/g) and theobromine (1.81, 0.86 mg/g) contents in jasmine tea, and theaflavin content (24.88, 1.36 mg/g) in black tea by ethanol and water extract were the highest. Caffeine content was the highest in black tea(96.48 mg/g) for the ethanol extract, and in jasmine tea (12.38 mg/g) for the water extract.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.39 no.5
• /
• pp.662-668
• /
• 2010

We evaluated the physiological effects of formulations added with black garlic extract on skin care. Black garlic was made by spontaneous fermentation for 40 days at $60{\sim}70^{\circ}C$ and 85~95% RH without any additives. When black garlic extract was added to formulation, the tyrosinase activity was decreased significantly (p<0.05, p<0.01, p<0.001). Base formulation inhibited slightly elastase activity (<5%), while black garlic formulation had about 8-fold higher elastase inhibitory activity (p<0.01). It was observed that formulations, with or without black garlic extract, decreased thiobarbituric acid reactive substances (TBARS) and hydrogen peroxide which were increased by UVB irradiation, although there were no significant differences of these contents between black garlic formulation and base formulation. In conclusion, black garlic formulation had high inhibitory activities for tyrosinase and elastase, suggesting that black garlic may have beneficial properties as a material for cosmeceuticals.

• Transactions of the Korean Society of Mechanical Engineers B
• /
• v.38 no.1
• /
• pp.17-24
• /
• 2014

We measured black carbon concentration in rural area to understand the characteristic of atmospheric aerosol by comparing the black carbon concentration and meteorological factors such as PM10 concentration, relative humidity, temperature and wind velocity. A MAAP (Multi Angle Absorption Photometer) which is one of filter based equipments was used to measure black carbon concentration. Black carbon concentration was measured to be high from April to May and low from June to September. Black carbon concentration was proportional to PM10 concentration. Black carbon concentration was correlated to relative humidity. Black carbon concentration was inversely proportional to wind velocity and temperature. Finally, we suggest that the volume fraction of black carbon in the atmosphere can be estimated from the size, number concentration and absorption coefficient measured using the MAAP.

• Journal of the Korean Recycled Construction Resources Institute
• /
• v.1 no.3
• /
• pp.181-188
• /
• 2013

This paper is to investigate experimentally an effect of carbon amino silica black-superplasticizer(CASB-SP)on the engineering properties and chromaticity of black color concrete with 0.45 of W/C(water to cement). CASB-SP and carbon black were applied for pigment of the concrete. To prevent efflorescence of concrete, four different water repellent agents were also applied. As results, it was found that use of CASB-SP increased the slump and air contents. Furthermore, the use of CASB-SP increased the compressive strength. As CASB-SP dosages increased, chromaticity was well developed. For the effect of water repellent agent, the use of epoxy type was effective for protection from efflorescence. Based on test results, it was evaluated that 0.5% of CASB-SP effectively improve the concrete quality as well as enhance the chromaticity with proper dosage.

• Journal of the Korean Society of Costume
• /
• v.57 no.4 s.113
• /
• pp.18-29
• /
• 2007

Since its birth, "Little black dress" that has been prospering and reviving continually for 80 years, is always favored as classical fashion item. This study focuses on how the "Little black dress", regarded as the beginning of the modern fashion, could become an eternal item over a century by analyzing the aesthetical characteristics of it. Thus, we can better understand the modern women and aesthetic value of modern fashion. The precedented studies and literatures are reviewed for recognizing the development of "Little black dress," and the scope of this study is limited only after the year 2000. Also, fashion work collections and various domestic and international fashion magazines are analyzed demonstratively. After the Little Black Dress was born with the bullish black color in the year 2000, the aesthetic characteristics of the newly spotlighted Little Black Dress in the modern fashion are as the following. First is modernism. Modern style of black dress is appeared through simple and moderate expressions such as pursuit of simple line, minimization of decoration and exclusion of accessories. Second is sensuality that emphasizes flashiness of black by gloss or see-through fabric and exposing one's body parts or dress that exposes body's curves not only express women's physical attraction but also show off woman's social status or roles. Third is feminism. Ruffle, ribbon, flowing-like fabric, and rhythmical details express charms of sophisticated and trendy women as well as romantic image of girlish sensibility. Fourth is hybridism. Experimental and creative thinking like designers' unique re-interpretation of "little black dress," fresh view to sexuality, breaking up of the existing principle of clothing compositions give wholly new aesthetic value.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.21 no.3
• /
• pp.544-558
• /
• 1997

Black street style has made unique fashion in popular music such as Jazz, Soul, Rhythm Il Blues. Reggae, and Rap, and it is counterculture and subculture against white. Furthermore, the black street style has played a starring role in the development of white culture as well as black culture, which emerged in direct opposition to the dominant cultures practised by a fraction of fellow countrymen within the black diaspora. The objectives of this study are to examine the social chronology of the black street style and the contemporary fashion, and the influences of the black street style on white culture. The seeds of black's style were sown in the late forties, developing throughout the fifties with the arrival of black immigrants from the west Indies and its examples were zooties, hip cats 8l hipsters, modernists. Rude boy & two-tone was anti·fashion style in sixties and then rastafarians continued in seventies costume is used to convey an essential symbolic class and ethnic message. The latest black's street fashion is hip-hop dress, which is pluralistic and electric, and funk is also erratic. During its ten-year reign as an international style, it has undergone numerous shifts because it is decline of racism B-boy & flygirls toraggamuffins & bhangra style to acid Jazz. These have played a crucial part in influencing the gigh fashion and avant-grade fashion designers' work. Today's street fashion has characteristics of postmodern culture without a racism in global village. Moreover, pop music stars take an effect on the street style continuously. With the opening of a new century, the study of the street style will overcast popular fashion and suggest the direction of fashion design.

• Journal of the Korean Society of Food Culture
• /
• v.36 no.6
• /
• pp.649-660
• /
• 2021

In this study, soybean pods of 45 soybean landraces (or varieties) were classified as yellow (19 samples), black (23 samples), or black in green (3 samples) based on soybean seed coat color. Total polyphenol and flavonoid contents were measured, and antioxidant, anti-inflammatory, anti-obesity, and estrogen-like activities were assessed. Total polyphenol and flavonoid content ranges were 24.13-108.03 mg GAE/g and 3.31-72.02 mg CE/g, respectively, and were highest in the black group followed by the yellow group and were least in the black in green group, while ABTS and DPPH activities followed the order black in green > black > yellow. Estrogen-like and estrogen receptor-α activity ranges were 29.06-35.58 pg/mL and 7.05-10.13 pg/mL and were followed the order yellow > black > black in green and black in green > yellow > black, respectively. Nitric oxide (NO) inhibitory and UCP-1 activities followed the same order as estrogen receptor-α activities. Our findings suggest that soybean pods are excellent sources of antioxidants and high-quality functional materials.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.38 no.5
• /
• pp.437-441
• /
• 1993

The improvement of superior black soybeans could be accomplished through maintenance and use of black soybean collections. A collection of 965 black soybean lines currently grown by farmers was made in 197 locations on spring, 1991. This study was carried out to evaluate them as useful germplasm. Seed characteristics of black soybean collections were evaluated for black soybean breeding for seed quality. The 100-seeds weight of 929 black soybean genotypes were distributed from 6.9 to 48.1 gram. The maximum and minimum 100-seeds weight were derived from Chungnam and Jeonbuk province, respectively. l00-seeds weight was heavier in middle and late maturity group, as maturity was later, whereas no tendency was shown in early maturity group. Length, width and thickness of the collected black soybean seeds were 9.5$\pm$1.5mm, 7.3$\pm1.3mm and 7.3$\pm1.2mm, respectively. Black soybean collections with yellow seed embryo was 72% and the others were green seed embryo.