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셀룰로오스와 나일론 직물의 쑥 추출물에 대한 염색성과 항균성
신승엽 ( Seung-yeop Shin ),정혜원 ( Haewon Chung ) 한국의류학회 2013 한국의류학회지 Vol.37 No.8
We examined dyeing properties using cotton, Tencel, general nylon 66 and hollow nylon 66 treated with aqueous and ethanol extracts without mordant. The antimicrobial properties of fabrics treated with Artemisia extracts against gram positive Staphylococcus aureus (S. aureus) and gram negative Klebsiella pneumonia (K. pneumonia) were also examined. The dying solution concentrations were determined from a calibration curve of the concentration and absorbance of Artemisia extracts. FTIR spectra confirmed that antimicrobial components and colorants (such as 1,8-cineol, thujone, caffeoylquinic acid and chlorophyll) were more present in ethanol extract than in aqueous extract. Nylons had higher a* and b*, and lower L* values than cellulose fabrics dyed with aqueous solutions of Artemisia extracts; however, the dyed nylon fabrics were brown. Fabrics dyed with ethanol-extract added solutions were greener and had higher antimicrobial properties than those dyed with aqueous solutions; however, they faded and lost their antimicrobial properties after laundering. Fabrics regained their antimicrobial properties (especially against S. aureus) by the spraying of Artemisia ethanol extract; therefore, the application of Artemisia ethanol extract onto underwear is expected to relieve atopic dermatitis.
신승엽 ( Seung Yeop Shin ),정혜원 ( Hae Won Chung ),황나원 ( Na Won Hwang ),황희종 ( Hee Jong Hwang ) 한국의류학회 2012 한국의류학회지 Vol.36 No.8
Many Koreans have recently bleached their black hair to blond or a light color due to the influence of their favorite Korean idols. Bleaching effects were studied under various bleaching conditions, such as the concentration of oxidants, the ratio between bleach accelerant and oxidant, and treatment temperature and time. The degree of damage of bleached hair with the same color difference (ΔE) intervals was observed in SEM images, the retention of breaking load and the change of color after dyeing. The ratio between bleach accelerant and oxidant of 1:2.5 was an effective condition. L* values of the bleached hair treated with 9% oxidant increased to 90 min. At a treatment temperature of 30℃, a* values were maximum at 30 min and then decreased as time further increased; however, b* values of the bleached hair increased as the treatment time increased. At 45℃, both of a* and b* values showed a maximum at a specific time. Bleaching efficiency was influenced most by temperature, followed in order by time, and oxidant concentration. As the treatment time increased, L* values greatly increased with twice treatment; however, a* and b* values decreased. Bleached hair, which had a color difference of higher than 30, showed the scales were completely removed and the retention of the breaking load greatly decreased. Highly bleached hair showed a great decrease in L* values by dyeing; however, dyeing with bright colors was more indicative to the effect of bleaching.
오존과 계면활성제를 이용한 대수층 내 비휘발성 물질 제거
양수경,신승엽,김헌기,Yang, Su-Kyeong,Shin, Seung-Yeop,Kim, Heon-Ki 한국지하수토양환경학회 2010 지하수토양환경 Vol.15 No.6
Surfactant-enhanced ozone sparging (SEOS), an advanced version of SEAS (surfactant-enhance air sparging) was introduced in this study for the first time for removal of non-volatile contaminant from aquifer. The advantages of implementing SEAS, enhanced air saturation and expanded zone of sparging influence, are combined with the oxidative potential of ozone gas. Experiments conducted in this study were tow fold; 1-dimensional column experiments for the changes in the gas saturation and contaminant removal during sparging, and 2-dimensional box model experiment for the changes in the size of zone of influence and contaminant removal. An anionic surfactant (SDBS, sodium dodecylbenzene sulfonate) was used to control surface tension of water. Fluorescein sodium salt was used as a representative of watersoluble contaminants, for its fluorescence which is easy to detect when it disappears due to oxidative degradation. Three different gases (air, high-concentration ozone gas, and low-concentration ozone gas) were used for the sparging of 1-D column experiment, while two gases (air and low-concentration ozone gas) were used for 2-D box model experiment. When SEOS was performed for the column and box model, the air saturation and the zone of influence were improved significantly compared to air sparging without surface tension suppression, resulted in effective removal of the contaminant. Based on the experiments observations conducted in this study, SEOS was found to maintain the advantages of SEAS with further capability of oxidative degradation of non-volatile contaminants.
대학축구지도자의 변혁적·거래적 리더십이 조직유효성에 미치는 영향
송상우(Song, Sang-Woo),신승엽(Shin, Seung-Yeop),박창범(Park, Chang-Beom) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5
The purpose of this study is to examine the effect of leadership types such as transformational leadership and transactional leadership and transactional leadership of university soccer coaches on job satisfaction, organizational commitment, and intention to leave of soccer players. To achieve these goals, hypothesis and test was accompanied. Based on the 247questionnaires from university soccer team players, analysis of variance and multiple regression analysis were applied. According to analysis of variance, perceived leadership level appeared partly to be different and according to platers" grades and positions in soccer team. benly charisma and contingent reward showed different according to their grades, and inspirational leadership appeared to be different according to their positions. According to multiple regression analysis, All leadership styles except of exceptional leadership appeared to have positive effects on job satisfaction under the significance level of 0.01. And all leadership styles except of charisma appeared to have positive effects on organizational commitment under the significance level of 0.01. Charisma, intellectual stimulation and contingent reward appeared to be negative effects on intention to leave, but individual consideration, inspirational leadership and exceptional leadership not to be effective on intention to leave under the significance level of 0.01.
연구논문 : 직물의 β-cyclodextrin 가공에 따른 휘발성 유기성분의 흡착과 제거
정혜원 ( Hae Won Chung ),황나원 ( Na Won Hwang ),김주연 ( Joo Yeon Kin ),신승엽 ( Seung Yeop Shin ) 한국의류학회 2013 한국의류학회지 Vol.37 No.1
Clothes that retain and emanate body odor feel uncomfortable and unclean; subsequently, the adsorption, desorption and removal amounts of malodorous compounds from fabrics with different polarities were examined. 1-Octen-3-one, octanal and isovaleric acid, which are important malodor compounds from the body, were used as volatile organic compounds (VOC). Samples were prepared with unfinished and β-CD finished cotton, nylon and PET fabrics. The amounts of VOCs retained on the fabrics were measured using headspace GC-MS; in addition, the odor intensity of the samples were evaluated by 10 trained panelists. The amounts adsorbed were estimated by weight gain; however, moisture was found to have a larger effect on the increase in weight than VOCs. The polarity of the VOCs decreased in the order of isovaleric acid, octanal and 1-octen-3-one. Despite the exceptionally large amounts of octanal adsorbed on the nylon sample, the amounts of malodorous compounds adsorbed on fabrics increased with the decreasing VOC molecular weight. The unfinished PET sample adsorbed more VOCs than the unfinished-fabric samples. The odor intensity was mostly weaker in the β-CD finished fabrics than in the unfinished fabrics. The odor intensity of the β-CD finished fabrics was lower than unfinished fabrics. The amount of VOCs that remained on the soiled fabric samples after storing in air for 24 hrs decreased with the increasing VOC vapor pressure. Most VOCs were removed by washing; however, more VOCs were left on the β-CD finished fabrics than unfinished fabrics. The intensity of the odor from the unfinished PET and β-CD finished fabrics was stronger and weaker, respectively, than that of other fabrics, even when the same amounts of VOCs remained.