• Title/Summary/Keyword: bluish-green

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Synthesis of Bluish-green Dyes for Pure Polyolefin Fibers (순수 폴리올레핀 소재용 청록색 염료의 합성)

  • Jo, Nayeong;Lee, Junheon;Kim, Taekyeong
    • Textile Coloration and Finishing
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    • v.28 no.3
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    • pp.156-163
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    • 2016
  • The 6 novel super hydrophobic bluish-green dyes, showing the maximum absorption at 600~650nm, were synthesized to dye polyolefin fibers such as polypropylene and high strength polyethylene fibers. Their absorption spectra appeared almost the same at visible range, which meant the length of alkyl substituents did not affect on color appearance of the dyes. The optimum length of alkyl group was determined as hexyl substituents from the practical point of view. From the dyeing results, the optimum dyeing condition was $130^{\circ}C$ for 1 hour. The good fastness ratings to washing, rubbing were obtained showing 4-5 for both fibers. Light fastness was obtained also good rating 4 for both fibers.

Occurrence of Bluish Green Mold of Pleurotus eryngii by Penicillium corylophilum (Penicillium corylophilum에 의한 큰느타리버섯(Pleurotus eryngii) 푸른곰팡이병의 발생)

  • Jo, Woo-Sik;Rew, Young-Hyun;Kim, Sung-Han;Yun, Jae-Tak;Choi, Boo-Sull
    • The Korean Journal of Mycology
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    • v.27 no.6 s.93
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    • pp.412-414
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    • 1999
  • Bluish green mold of Pleurotus eryngii caused by Penicillium was observed in Seungju on Feburary 4, 1999. The causal fungus was identified as Penicillium corylophilum based on its cultural and morphplogical characteristics. Conidiophores one-stage branched, terminating in a whorl of $2{\sim}4$ metulae. Metulae mostly $10{\sim}18{\times}2.5{\sim}3.0\;{\mu}m$. Phialides flask-shaped, $9{\sim}13{\times}2.2{\sim}2.8\;{\mu}m$. Conidia subglobose, $2.5{\sim}3.2{\times}2.5{\sim}3.0\;{\mu}m$. Colonies on Czapek agar mostly attaining a diameter of 21 mm within 7 days at $25^{\circ}C$. Colour blue-green soon becoming grey-green. Pathogenicity test by wound inoculation revealed that Penicillium corylophilum caused the same symptoms as observed in the field at $6{\sim}7$ days after inoculation.

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An Analysis of a Wicked Women Costume Colors and Images in a Fairy Tale (동화 속 악녀 의상의 색채와 이미지 분석)

  • Nam, Yoon-Sook;Kim, Bok-Hee
    • Journal of the Korea Fashion and Costume Design Association
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    • v.11 no.3
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    • pp.73-85
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    • 2009
  • This study aims to analysis the costume colors and images of wicked women in fairy tale. For the most costume applied to the relationship between color kind, brightness, and saturation. so, this study investigated the costume colors put on by wicked women in fairy tales and analysed and interpreted them by inputting data. First, mostly the costume colors applied to transfer the image of wicked women were dark blue, red, violet, bluish green, green, and purple. Second, the colors feeling cool and cold such as dark blue, bluish green, green, and blue were applied more frequently than the colors feeling warm and mild. Third, the deep and dark color tones with low brightness and low saturation affected by the mixture ratio of black were applied frequently for the use of wicked woman colors. Fourth, the colors mentioned above have the meaning of men, powerful, authority, cruel, angry, brutal, mysterious, and evil, that have the property of attacking and strong wicked women. They were expressed by the costume put on by wicked women.

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The optical properties of ZnS/$Na_3AlF_6$/ZnS multi-layered thin film with Co reflection layer (ZnS/$Na_3AlF_6$/ZnS 박막의 Cu 반사층을 이용한 광 특성)

  • Kim, Jun-Sik;Jang, Gun-Ik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.11a
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    • pp.322-323
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    • 2008
  • Multi layered thin films with ZnS/$Na_3AlF_6$/ZnS were deposited on glass substrate by thermal evaporator precess and simulated by using EMP(Essential Macleod Program). EMP is a comprehensive software package to design and analyse the optical characteristics of multi-layered thin film. ZnS and $Na_3AlF_6$ were selected as a high refractive index and low refractive index material respectively. Additionally Cu was chosen as mid reflective material. Optical properties including color effect were systematically studied. in terms of different optical thickness of low refractive index material. The optical thickness of $Na_3AlF_6$ was changed as 0.25, 0.5, 0.75 and $1.0\lambda$. The film with 0.25, 0.5, 0.75 and $1.0\lambda$. of optical thickness showed mixed color range between bluish green and red purple, yellowish green and bluish green, purple and mixed color range of green and purple respectively.

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Synthesis and Electroluminescent Properties of Cabazolyl Vinylene Derivatives

  • Seo, H.J.;Park, H.C.;Lee, S.E.;Park, J.W.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.952-954
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    • 2003
  • We report the photo-(PL) and electroluminescence (EL) properties of new conjugated compounds based on carbazolyl vinylene moiety, 3,3'-(1,4-phenylene di-2,1-ethenediyl) bis[9-ethyl-(E,E)-9H-carbazole](PEEC) and 3,3'-([1,1'-biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis[9-ethyl-9H-carbazole](BPEEC), as emitting materials. The ITO/m-MTDATA/NPB/BPEEC/Alq3/LiF/Al device shows bluish-green EL spectrum at 490nm and turn-on voltage at 8V. PEEC shows bluish-green EL around ${\lambda}$ max=496nm and turn-on voltage at 6V and 2.4 Cd/A efficiency in ITO/m-MTDATA/NPB/PEEC/Alq3/LiF/Al device.

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Fully Substituted Ethylene as a New Class of Efficient Sky-Blue Emitting Materials for OLEDs

  • Kim, Soo-Kang;Park, Young-Il;Park, Jong-Wook;Kim, Kyung-Soo;Choi, Cheol-Kyu;Lee, Sang-Do
    • Journal of Information Display
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    • v.8 no.1
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    • pp.10-13
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    • 2007
  • We synthesized new blue and bluish green emitting materials by using fully substituted ethylene moieties. Multi-layered EL devices were fabricated with synthesized materials and evaluated in terms of emission color and luminescence efficiency. TBBPE[EML 2] device showed bluish-green CIE value of (0.236, 0.412) and 5.02cd/A at $10mA/cm^2$. BPBBPE[EML 3] device also showed sky-blue CIE value of(0.218, 0.355) and 2.31cd/A at $l0mA/cm^2$.

Synthesis and Application of Bluish-Green BaSi2O2N2:Eu2+ Phosphor for White LEDs (백색 LED용 청록색 BaSi2O2N2:Eu2+ 형광체의 합성 및 응용)

  • Jee, Soon-Duk;Choi, Kang-Sik;Choi, Kyoung-Jae;Kim, Chang-Hae
    • Korean Journal of Materials Research
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    • v.21 no.5
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    • pp.250-254
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    • 2011
  • We have synthesized bluish-green, highly-efficient $BaSi_2O_2N_2:Eu^{2+}$ and $(Ba,Sr)Si_2O_2N_2:Eu^{2+}$ phosphors through a conventional solid state reaction method using metal carbonate, $Si_3N_4$, and $Eu_2O_3$ as raw materials. The X-ray diffraction (XRD) pattern of these phosphors revealed that a $BaSi_2O_2N_2$ single phase was obtained. The excitation and emission spectra showed typical broadband excitation and emission resulting from the 5d to 4f transition of $Eu^{2+}$. These phosphors absorb blue light at around 450 nm and emit bluish-green luminescence, with a peak wavelength at around 495 nm. From the results of an experiment involving Eu concentration quenching, the relative PL intensity was reduced dramatically for Eu = 0.033. A small substitution of Sr in place of Ba increased the relative emission intensity of the phosphor. We prepared several white LEDs through a combination of $BaSi_2O_2N_2:Eu^{2+}$, YAG:$Ce^{3+}$, and silicone resin with a blue InGaN-based LED. In the case of only the YAG:$Ce^{3+}$-converted LED, the color rendering index was 73.4 and the efficiency was 127 lm/W. In contrast, in the YAG:$Ce^{3+}$ and $BaSi_2O_2N_2:Eu^{2+}$-converted LED, two distinct emission bands from InGaN (450 nm) and the two phosphors (475-750 nm) are observed, and combine to give a spectrum that appears white to the naked eye. The range of the color rendering index and the efficiency were 79.7-81.2 and 117-128 lm/W, respectively. The increased values of the color rendering index indicate that the two phosphor-converted LEDs have improved bluish-green emission compared to the YAG:Ce-converted LED. As such, the $BaSi_2O_2N_2:Eu^{2+}$ phosphor is applicable to white high-rendered LEDs for solid state lighting.

Color vision defectives' color emotion association (색각이상자의 색채 감성 연상)

  • Woo, Sungju;Park, Chongwook
    • Science of Emotion and Sensibility
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    • v.16 no.4
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    • pp.557-566
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    • 2013
  • This study is to investigate the color emotion associations of the color vision defectives, considering that the colors do have an effect on human emotional conditions. To realize this investigation, firstly we selected 100 normal persons (group C)and other 34 color vision defectives(group A), dividing the last group into two small groups as protanomaly group(group P) with 8 persons and deuteranomaly group(group D) with 16 persons. All participants have been offered to select one color from ten colors for each of three positive emotions such as 'favorite', 'happy' and 'friendly' and of three negative emotions like 'sad', 'disliked' and 'awkward'. And they selected another one color for each active and passive emotions. For 'favorite color' the group C selected 'blue' and 'red' while the group A chose 'blue'. For 'happy color' the two groups selected 'yellow'. For 'friendly color' the group C chose 'green', but the group A selected 'blue'. For 'sad color' the group C preferred 'blue', but the group A chose 'purple'. For 'disliked color' all groups selected 'bluish green'. For 'awkward color' the two groups preferred 'bluish green'. For 'active color' all groups selected 'red'. And for 'passive color' the group C chose 'bluish green', but the group A selected 'blue'. Depending on the type of color vision deficiency(group P and group D) some more differences were revealed relatively. These results should be applied to develop some intelligent color conversion technology for enhancing the usability of culture contents for color vision defectives.

Changing Process of the Glass Beads from Osan Sucheong Site in Gyeonggi-do, Korea (오산 수청동 유적 부장 유리구슬의 전개양상)

  • Lee, Min-hee;Kim, Na-young;Kim, Gyu-ho
    • Journal of Conservation Science
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    • v.33 no.5
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    • pp.331-344
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    • 2017
  • In this study, glass beads from Osan Sucheong were classified according to color into 10 groups. Among these groups, reddish brown, bluish green, and purplish blue were identified as the main colors of glass beads based on their large quantities in Osan Sucheong. The glass beads of these main colors were then classified according to their chemical compositions and and looked at the changing process. Based on the results, reddish brown and bluish green glass beads can both be divided into five types, and purplish blue glass beads can be divided into four types. Furthermore, according to continuity of type, it was identified as the main attributes that the reddish brown beads belong to two types, whereas the bluish green and purplish blue each belong to one type. Based on a review of primary attributes, beads of these three colors were identified as soda glass and high-alumina glass. The results indicate that these beads came from a single, consistent route of origin into the region. However, it is possible that glass beads came through various routes into Osan Sucheong in the $4^{th}$ century, because many types of chemical compositions have been detected for beads from this time.

Luminescent properties of magnesium thiogallate phosphor with green emission for LEDs

  • Kim, Kyung-Nam;Kim, Jae-Myung;Choi, Kyoung-Jae;Park, Joung-Kyu;Kim, Chang-Hae
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07b
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    • pp.1331-1333
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    • 2005
  • A magnesium thiogallate phosphor doped with europium was prepared by solid-state method. This phosphor has green emission near 535 nm due to the allowed transition from $4f^65d$ at an excitation state $(T_{2g})$ to $4f^7 (^8S_{7/2}) at a ground state of $Eu^{2+}$ ion. This phosphor shows a wide excitation spectrum from ultra violet (300 nm) to bluish green (515 nm).

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