http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Size-dependent toxicity of silver nanoparticles to Glyptotendipes tokunagai
Seona Choi,Soyoun Kim,Yeon-Jae Bae,June-Woo Park,Jinho Jung 환경독성보건학회 2015 환경독성보건학회지 Vol.30 No.-
Objectives : This study aims to evaluate the size-dependent toxicity of spherical silver nanoparticles (Ag NPs) to an endemic benthic organism, Glyptotendipes tokunagai. Methods : Ag nanoparticles of three nominal sizes (50, 100, and 150 nm) capped with polyvinyl pyrrolidone (PVP-Ag NPs) were used. Their physicochemical properties, acute toxicity (48 hours), and bioaccumulation were measured using third instar larvae of G. tokunagai. Results : The aggregation and dissolution of PVP-Ag NPs increased with exposure time and concentration, respectively, particularly for 50 nm PVP-Ag NPs. However, the dissolved concentration of Ag ions was not significant compared with the median lethal concentration value for AgNO3 (3.51 mg/L). The acute toxicity of PVP-Ag NPs was highest for the smallest particles (50 nm), whereas bioaccumulation was greatest for the largest particles (150 nm). However, larger PVP-Ag NPs were absorbed and excreted rapidly, resulting in shorter stays in G. tokunagai than the smaller ones. Conclusions : The size of PVP-Ag NPs significantly affects their acute toxicity to G. tokunagai. In particular, smaller PVP-Ag NPs have a higher solubility and stay longer in the body of G. tokunagai, resulting in higher toxicity than larger PVP-Ag NPs.
Seona Baek,Jungsoon Choi J-INSTITUTE 2021 Public Value Vol.6 No.2
Purpose: Traditional Korean patterns, which have continued throughout our life history, have developed into decorative patterns that apply dots, lines, and colors today through changes in the times. It is an important inspiration for the creation of various sculptures against the backdrop of a sense of beauty in modern society, and this is no exception in the field of beauty design. This study aims to expand the range of expressions on masks by applying makeup design to art masks by applying traditional Korean patterns and obang colors. Method: First, we consider the theoretical background of Korean traditional patterns, obang colors, and art masks. Second, we analyze the characteristics of traditional Korean patterns and obang colors. Third, we analyze the concept and expression techniques of art masks. Fourth, based on the above research, art mask works are produced based on traditional Korean patterns and obang colors. As a research method, we will focus on domes-tic dissertations and professional books and present a wide range of art mask designs by applying traditional Korean patterns and obang colors. Results: The first work was based on the motif of ghost painting, which recognized ghosts as good beings, not evil beings, and expressed the main pattern of ghost painting in a three-dimensional manner. The second work is based on lotus patterns, and it expresses a beautiful, colorful, but sad lotus flower by contrasting the lotus patterns with two colors. The third work is based on dragon patterns, and since ancient times, dragons and phoenixes have expressed the best as imaginary animals in myths and legends. Conclusion: Traditional patterns and obang colors have been studied in various fields in modern times, and traditional patterns and obang colors have been used in various fields in the beauty design field recently. Based on the results of this study, various scope of art mask design research using Korean traditional patterns and obang colors were presented within art makeup design.