• Title/Summary/Keyword: pc-Jun

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Protein Kinase A Functions as a Negative Regulator of c-Jun N-terminal Kinase but not of p38 Mitogen-activated Protein Kinase in PC12 Cells

  • Hur, Kyu-Chung
    • Animal cells and systems
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    • v.9 no.3
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    • pp.173-179
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    • 2005
  • Cyclic-AMP-dependent protein kinase (PKA) seems to function as a negative regulator of the c-Jun $NH_2-terminal$ kinase (JNK) signaling pathway. We demonstrate here that the activity of the PKA catalytic subunit (PKAc) is reduced in apoptotic PC12 pheochromocytoma cells. Apoptotic progress was inhibited by dibutyryl cyclic AMP (dbcAMP), an analog of cAMP. The rescue by dbcAMP was attributable to inhibition of the JNK but not of the p38 signaling pathway, due to the induction of PKA activity. JNK was present in immunocomplexes of PKAc, and PKAc phosphorylated JNK in vitro. Presence of p38 kinase, however, was not prominent in immunocomplexes of PKAc. Our data suggest that JNK is a target point of negative regulation by PKAc in the JNK signaling pathway.

Physical Properties Evaluation of Porous Concrete according to Target Porosity and Pumice Contents Ratio for Application of the Aquatic Environment (수계환경 적용을 위한 설계공극률 및 부석 혼입률에 따른 포러스콘크리트의 물리적 특성 평가)

  • Kim, Woo-Suk;Park, Jae-Roh;Kim, Bong-Kyun;Seo, Dae-Seuk;Park, Jun-Seok
    • Journal of the Korea Concrete Institute
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    • v.28 no.6
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    • pp.703-711
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    • 2016
  • The present study is mainly aimed at securing adequate pores which are applicable to the aquatic environment and satisfying the required strength of porous concrete as a structure by substituting pumice for crushed stone which is usually used for the fabrication of porous concrete. Accordingly, in order to deduce the optimum mixing conditions applicable to the aquatic environment, we sought to evaluate the porosity, coefficient of permeability and compressive strength of porous concrete based on the target porosity and the mixing factors for pumice. By examining the porosity and coefficient of permeability of porous concrete and the physical properties of its compressive strength based on the target porosity and the mixing factors for pumice, it is judged that the optimum mixtures for porous concrete applicable to the aquatic environment which satisfy both the necessity of securing adequate pores and the required strength for porous concrete as a structure are PC I I-10-0, PC I I-10-5 and PC I I-10-10.

Tablet PC based Convergence Educational Serious Game for Children (태블릿 PC 기반의 융합형 아동 교육용 기능성 게임)

  • Ko, Jeong-Won;Lee, Ji-Won;Kim, Mi-Hye;Jung, Hye-Kyung;Park, Sung-Jun
    • Journal of Korea Game Society
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    • v.14 no.1
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    • pp.59-68
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    • 2014
  • As the prevalence of mobile platforms, expanding digital content production and also increasing interest about the serious game. However, existing educational serious games are short of application of educational function and lower effectiveness that not linked with off-line education. In this paper, we developed an educational serious game 'Rice-Mimi Adventure' for children based Tablet PC. The Games are designed five steps by four elements that storytelling, playing, music and cooking. Specially, players interaction between characters should be increase their own concentration and interest. For the effectiveness verification that linked education of on/off-line, experiment to 126 students of 3,4th grade in Choenan. A result shows positive data that on/off-line linked education using Tablet PC and effectiveness of game contents applied design factors. For this work, we should find effective class and teaching method using digital contents in off-line education for children.

Effect of SMA on the Interfacial Shear Strength for Single Glass Fiber and PC/SAN Blends (SMA가 PC/SAN 블렌드와 유리섬유간의 계면결합력에 미치는 영향)

  • Lee, Ui-Hwan;Nam, Gi-Jun;Lee, Jae-Uk
    • Polymer(Korea)
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    • v.25 no.4
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    • pp.512-520
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    • 2001
  • One of the most important factors which affect the mechanical properties of fiber-reinforced composite materials is the interfacial shear strength (IFSS). The IFSS of glass fiber and polycarbonate (PC)/styrene-co-acrylonitrile (SAN) blend system has been measured by the single fiber fragmentation test (SFFT). SAN contents were varied up to 30 wt% and the IFSS increased with the SAN contents. Styrene-co-maleic anhydride (SMA) was used as the compatibilizer and the glass fiber was surface treated with organosilane coupling agents. Addition of small amount of SMA in PC/SAN blend improved the IFSS by chemical bonding between maleic anhydride and silanol. The optimum MA content was 0.4 wt% of total matrix contents. Also, IFSS was greatly affected by the miscibility condition of SAN/SMA blends, which depended on the copolymer composition of SAN and SMA. It was found out that, higher IFSS could be obtained when the SAN/SMA blend was in miscible pairs. In case of SAN/SMA miscible pairs, the IFSS depended on the MA content in total matrix, not on the MA content in SMA.

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Cu-Pc 박막의 성장 조건에 따른 phase transition 현상 및 전기적.광학적 특성

  • Gang, Sang-Baek;Chae, Yeong-An;Yun, Chang-Seon;Kim, Mi-Jeong;Kim, Jin-Tae;Cha, Deok-Jun
    • Proceedings of the Korean Vacuum Society Conference
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    • 2010.02a
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    • pp.230-230
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    • 2010
  • 유기물 반도체 화합물인 Cu-Pc(copper(II)-phthalocyanine)는 우수한 전기적 광학적 특성을 가지며, OLED, MISFET등 소자로서의 활용도가 높다. Cu-Pc 화합물은 $\alpha$-phase, $\beta$-phase, $\gamma$-phase를 포함하는 여러 가지 다결정 polymer로 존재할 수 있다. 가장 잘 알려진 구조로는 열적으로 준안정적인 $\alpha$-phase와 열적으로 안정적인 $\beta$-phase가 있다. Cu-Pc 박막의 구조 및 흡수 특성과 전기적 특성에 대한 기술이 확실히 규명되지 않아 본 연구에서는 두께와 열처리 조건에 따른 결정성 및 방향성을 조사하기 위하여 $\alpha$-phase와 $\beta$-phase의 phase transition 현상 및 전기적 광학적 특성을 규명 하고자 한다. 진공증착 방법 중 하나인 PVD 방법의 thermal evaporation deposition을 이용하여 glass, ITO 기판위에 두께와 열처리에 따른 전기적?광학적 특성을 연구하였다. Cu-Pc 박막의 성장두께는 5nm~50nm 이내로 fluxmeter 및 thickness monitor를 이용하여 제어하였다. 5nm~50nm의 두께에 따른 기판온도를 $200^{\circ}C$로 고정하여 전열 처리 및 후열 처리하여 온도에 따른 박막을 성장한 후, 결정 구조 및 특성 변화와 phase transition 분석하였다. 제작된 Cu-Pc의 박막은 $\alpha$-phase와 $\beta$-phase로 구분할 수 있으며, 열처리에 따른 phase transition 현상이 뚜렷함을 알 수 있다. XRD(X-ray diffraction)를 통하여 박막에 대한 결정 구조 분석 및 FE-SEM(field emission scanning electron microscopy)와 AFM(atomic force microscopy)을 이용하여 Cu-Pc 박막의 구조적 결정성과 방향성 등, 표면 상태와 형상구조에 대해 표면의 특성을 측정하며, 광 흡수도(UV-visible absorption spectra)을 이용하여 phase transition 현상에 따른 I-V 특성을 비교분석 하였다.

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Responses in growth performance and nutrient digestibility to a multi-protease supplementation in amino acid-deficient broiler diets

  • Cho, Hyun Min;Hong, Jun Sun;Kim, Yu Bin;Nawarathne, Shan Randima;Choi, Inchul;Yi, Young-Joo;Wu, Di;Lee, Hans;Han, Seung Eun;Nam, Ki Taeg;Seoung, Eun Il;Heo, Jung Min
    • Journal of Animal Science and Technology
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    • v.62 no.6
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    • pp.840-853
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    • 2020
  • The present study was conducted to investigate the effect of a multi-protease on production indicators of broiler chickens fed a crude protein and amino acid deficient-diets for 35 days immediately after hatch. A total of 448 one-day-old Ross 308 male broiler chicks were allocated in a completely randomized design into one of eight dietary treatments (positive control [PC], negative control [NC: minus 0.5% from PC, and minus 2% of lysine, methionine, threonine and methionine plus cysteine], extreme negative control [ENC: minus 1% from PC, minus 4% of lysine, methionine, threonine and methionine plus cysteine], and plus multi-protease 150 or 300 g per ton [e. g., PC-150]; PC, PC-150, NC, NC-150, NC-300, ENC, ENC-150, ENC-300) to give eight replicates with seven birds in a battery cage. Body weight, average daily gain, average daily feed intake, feed conversion ratio, and mortality were measured every week. Carcass traits, proximate analysis of breast meat, and ileum digestibility were analyzed on day 21 and 35. Feeding a multi-protease (i.e., more than 150 g/ton) for 35 days immediately after hatching improved feed efficiency and ileum digestibility (i.e., dry matter, crude protein, and energy) compared to their counterparts (i.e., diets without multi-protease: PC, NC, and ENC). In conclusion, our results indicated that broiler chickens fed nutrients deficient-diet (i.e., crude protein and amino acids) supplemented a multi-protease had an ability to compensate and (or) improve their growth performance commensurate with increased ileal digestibility for 35 days immediately after hatch.

PC1D 기반의 2스텝 도핑을 통한 실리콘 태양전지의 최적화

  • Kim, Yeong-Pil;Jeong, U-Won;Lee, Jun-Sin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.11a
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    • pp.256-256
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    • 2009
  • This paper presents a proper condition to achieve above 17 % conversion efficiency using PC1D simulator. Crystalline silicon wafer with thickness of $240{\mu}m$ was used as a starting material. Various efficiency influencing parameters such as rear surface recombination velocity and minority carrier diffusion length in the base region, front surface recombination velocity, junction depth and doping concentration in the Emitter layer. Among the investigated variables, we learn that 2nd doping concentration as a key factor to achieve conversion efficiency higher than 17 %.

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PC1D 기반의 재결합 속도 제어를 통한 결정질 태양전지의 최적화

  • Lee, Ji-Seong;Jeong, U-Won;Lee, Jun-Sin
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.11a
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    • pp.257-257
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    • 2009
  • This paper explores a control of recombination velocity for optimization the crystalline solar cell. Using PC1D simulator, the efficiency of crystalline solar cell was measured to be about 17%. The results show that the lower the front recombination velocity is, the more efficiency of crystalline solar cell improves. The work which presented here has profound implications for studies of crystalline solar cell and someday may help solve the problem of optimization for the crystalline solar cells.

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