검색결과

검색조건
좁혀보기
검색필터
결과 내 재검색

간행물

    분야

      발행연도

      -

        검색결과 42

        1.
        2015.02 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study is to examine symbolic meanings of costumes shown by portraits of King Henry VIII and use them as basic data for research on costume design of historical dramas in the Renaissance or on King Henry VIII's costume. This study attempted analysis of symbolic meanings from the paintings-related various domestic and overseas literatures, preliminary study paper, and web sites etc. The symbolic meanings expressed by the portraits of King Henry VIII are characterized by authority, innovation performance, authority, masculinity, innovation performance, artistic taste, intellectual charm, intrepidity and benevolence. Especially, the portraits of King Henry VIII symbolized his masculine beauty by emphasizing sexual attractiveness that cannot be seen in portraits of other kings through broad shoulders and exaggerated codpiece which are the zenith of masculine beauty during the Renaissance age. Through the image of King Henry VIII which was painted with jester or barber surgeons, his characteristic and open mind thinking highly of the technique and human life was also expressed. In the portrait of King Henry VIII, various images set in knights' tournament, playing a musical instrument and reading a book as well as the image of wearing a parliament costume were shown, highlighting King Henry VIII as a person good at both literary and martial arts with open and innovative personality than any other kings in history.
        4,200원
        2.
        2014.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The purpose of this study was to analyze high school students' school uniform wearing attitude by group according to clothing attitude targeting Gyeongnam area. This study aims to provide preliminary data in the field of school uniform and marketing that clothing propensity by groups is considered. This study conducted a survey targeting 762 high school students in Gyeongnam. For statistical analysis, SPSS for Window 14.0 was used for frequency analysis, factor analysis, reliability analysis, multiple sponse analysis, cluster analysis, ANOVA analysis and Duncan's ex-post analysis method. As a result of cluster analysis on the clothing attitude, students were divided into 4 segmentation of fashion seeking group, fashion indifference group, conformity group and modesty group. As a result of verification on the difference in perception toward wearing school uniform by groups which were classified according to the propensity of clothing attitude, activity, stability, and practicality were all varied according to the propensity of clothing attitude. 4 groups were significant differences in the degree of consent to wearing school uniform, price of school uniforms, tendency to prefer famous brand when purchasing school uniform, experience of transforming school uniform, opinion about school uniform modification and reason for school uniform modification. While low graders were many in 'modesty group', upper graders were many in 'fashion seeking group', which means that more segmentalized satisfaction of clothing by group may be raised if such a fact is considered when planning clothing for high school students segmentalized by age.
        4,300원
        3.
        2014.12 구독 인증기관 무료, 개인회원 유료
        Glucosamine is commonly taken by the elderly without prescription as a nutritional supplement to attenuate the progression or symptoms of osteoarthritis. Previous studies demonstrated that glucosamine shows anti-inflammatory effects in tissues such as blood vessels and the heart. However, there have been few reports about the effects of glucosamine on oral inflammatory diseases. Therefore, in this study, the effects of glucosamine on lipopolysaccharide (LPS)-induced inflammatory responses were investigated using human periodontal ligament fibroblasts (HPDLFs). HPDLFs were incubated in the presence and absence of glucosamine (10 mM) for 24 h, followed by treatment with E. coli LPS (100 ng/ml) or vehicle. Quantitative RT-PCR and ELISA results showed that LPS exposure significantly increased the levels of IL-6 and IL-8 mRNA and protein, while the effect was significantly suppressed by glucosamine treatment. Glucosamine did not attenuate, but slightly increased, the LPS-induced activation of mitogen activated kinases (ERK, p38, JNK). However, it suppressed the LPS-induced increase in the DNA binding affinity and transcriptional activity of NF-κB. These results suggest that glucosamine exerts anti-inflammatory effects on HPDLFs exposed to LPS via inhibition of NF-κB activity, necessitating further studies using animal periodontitis models.
        4,000원
        4.
        2014.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Recently, several approaches have been used to measure the oxygen consumption rates of individual embryos, but relationship between oxygen consumption and pregnancy rates of Hanwoo following embryo transfer has not yet been reported. In this study, we investigated the correlation between oxygen consumption rate and pregnancy rates of Hanwoo embryo using a SECM. In addition to, the expression of apoptosis-related genes was determined using real-time PCR by extracting RNA according to the oxygen consumption of in vivo embryo. First, we found that the oxygen consumption significantly increased in blastocyst-stage embryos (blastocyst) compared to early blastocyst stage embryos, indicating that oxygen consumption reflects the embryo quality (Grade I). The oxygen consumption or GI blastocysts were significantly higher than those of GII blastocysts (10.2x1014/mol s-1 versus 6.4x1014/mol s-1, p<0.05). Pregnant rate in recipient cow was 0, 60 and 80% in the transplantation of embryo with the oxygen consumption of below 10.0, 10.0~12.0 and over 12.0x1014/mol s-1, respectively. Apoptosis regulatory genes, Hsp-70.1 were significantly increased in over-10.0 group than below 10.0 group but in Caspase-3, Bax and P53 gene, there was no significant difference. In conclusion, These results suggest that measurement of oxygen consumption maybe help increase the pregnant rate of Hanwoo embryos.
        4,000원
        5.
        2014.08 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, we optimized dissolution the dissolution conditions of porous amorphous powder to havehigh specific surface area. Porous metallic glass(MG) granules were fabricated by selective phase dissolution, in whichbrass is removed from a composite powder consisting of MG and 40 vol.% brass. Dissolution was achieved throughvarious concentrations of H2SO4 and HNO3, with HNO3 proving to have the faster reaction kinetics. Porous powderswere analyzed by differential scanning calorimetry to observe crystallization behavior. The Microstructure of milledpowder and dissolved powder was analyzed by scanning electron microscope. To check for residual in the dissolvedpowder after dissolution, energy dispersive X-ray spectroscory and elemental mapping was conducted. It was confirmedthat the MG/brass composite powder dissolved in 10% HNO3 produced a porous MG granule with a relatively high spe-cific surface area of 19.60 m2/g. This proved to be the optimum dissolution condition in which both a porous internalgranule structure and amorphous phase were maintained. Consequently, porous MG granules were effectively fabricatedand applications of such structures can be expanded.
        4,000원
        6.
        2014.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        황백(Cortex Phellodendri: CP)은 황벽나무(Phellodendron amurense)의 건조된 수피로부터 얻어진다. 이 수피는 한국의 전통 한약제로서 설사, 황달, 무릎과 발의 통증, 요도관 및 피부 감염증에 폭넓게 사용되어 왔다. 이들 기능성성분의 분리 및 정제는 박층 크로마토크래피, 컬럼 액체 크로마토크래피 및 HPLC와 같은 여러 분석법들이 동양의 약초연구에 이용되어 왔다. 본 연구는 CP로부터 berberine을 분리하기 위해 향류분배 크로마토크래피법(CPC)으로 효과적으로 수행하였다. 두 용매의 CPC 최적조성은 n-butanol: acetic acid: water(4:1:5 v/v/v)이었다. 이동상의 유속은 1,000 rpm 회전력에서 상승법으로 분당 3 mL 속도로 전개시켰다. CPC에서 분리된 분획분은 prep-HPLC로 정제하였다. 1H-NMR 스펙트럼은 4.10과 4.20 ppm에서 3H(-OCH3), 6.10 ppm에서 2H의 (-OCH2O-) proton signal의 공명이 관찰되었다. 2개의 방향족 proton은 이중결합 패턴을 보였다. H-11과 H-12 doublet은 각각 7.98과 8.11에서 나타났다. 13C-NMR 스펙트럼에서는 C2와 C3의 methylenedioxy group(-OCH2O-), C9과 C10에 methoxy group(-OCH3)이 4개의 치환된 형태로 보였다. 분리․정제된 berberine의 화학구조는 1H, 13C-NMR, ESI-MS 데이터 분석으로 확인하였다.
        4,000원
        7.
        2014.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        In this experiment, a highly porous scaffold of biphasic calcium phosphate (BCP) was prepared using the spongereplica method. The BCP scaffold was coated with 58S bioactive glass (BG) and sintered for a second time. The resulting scaffold was coated with gelatin (Gel) and cross-linked with [3-(3-dimethyl aminopropyl) carbodiimide] and N-Hydroxysuccinamide (EDC-NHS). The initial average pore size of the scaffold ranged from 300 to 700μm, with more than 85 % porosity. The coating of BG and Gel had a significant effect on the scaffold-pore size, decreasing scaffold porosity while increasing mechanical strength. The material and surface properties were evaluated by means of several experiments involving scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) and X-ray diffraction (XRD). Cytotoxicity was evaluated using MTT assay and confocal imaging of MC3T3-E1 pre-osteoblast cells cultured in vitro. Three types of scaffold (BCP, BCP-BG and BCP-BG-Gel) were implanted in a rat skull for in vivo evaluation. After 8 weeks of implantation, bone regeneration occurred in all three types of sample. Interestingly, regeneration was found to be greater (geometrically and physiologically) for neat BCP scaffolds than for two other kinds of composite scaffolds. However, the other two types of scaffolds were still better than the control (i.e., defect without treatment).
        4,000원
        8.
        2014.01 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        In this study, nano-sized cobalt oxide powder with an average particle size below 50 nm was prepared from a cobalt chloride solution by the spray pyrolysis process. The influences of reaction temperature on the properties of the generated powder were examined. The average particle size of the particles formed based on the spray pyrolysis process at a reaction temperature of 700˚C is roughly 20 nm. Moreover, most of these particles cannot appear with an independent type, thereby coexisting in a droplet type. When the reaction temperature increases to 800˚C, the average particle size not only increases to roughly 40 nm but also shows a more dense structure while the ratio of particles which shows a polygonal form significantly increases. As the reaction temperature increases to 900˚C, the distribution of the particles is from roughly 70 nm to 100 nm, while most of the particle surface is more intricately close and forms a polygonal shape. When the reaction temperature increases to 1000˚C, the particle size distribution of the powder shows an existing form from 80 nm to at least 150 nm in an uneven form. As the reaction temperature increases, the XRD peak intensity gradually increases, yet the specific surface area gradually decreases.
        4,000원
        10.
        2013.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        보광염낭거미(Clubiona zacharovi Mikhailov, 1991)의 암컷을 우리나라에서 최초로 기재한다. 이 종은 식물의 잔사체나 돌 밑 등을 배회하는 희귀종이다.
        3,000원
        11.
        2012.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To investigate the biochemical nature of changes in vaginal physiology during estrus and pregnancy, we examined the cytology and viscosity, and monitored the protein expression profile in vaginal mucus during estrus and pregnancy. The viscosity progressively decreased from estrus to pregnancy. Cell type analysis revealed that white blood cells progressively increased from estrus to pregnancy, while red blood cells progressively decreased during pregnancy. The cornification index (CI) was higher in estrus than in pregnancy. Protein mass spectrumetry identified the presence of ribosome-binding protein 1, GRIP 1 (Glutamate receptor-interacting protein 1)-associated protein 1, DUF729 (Domain of unknown function729) domain-containing protein 1, prolactin precursor, dihydrofolatereductase, and MMP (Matrix metalloprotease)-9 in vaginal mucus. MMP-2 and MMP-9 proteins in the vaginal mucus were active throughout estrus and gestation, as measured by a gelatinase assay, but most abundant in the vaginal mucus on day 0 of estrus. Results from ELISA of MMP-2 and MMP-9 were in accordance with the gelatinase assay. In light of the crucial role of metalloproteinases in extracellular matrix remodeling, the level of MMP-9 in vaginal mucus might be useful as an indicator of estrus and pregnancy to increase the efficiency of reproduction.
        4,000원
        12.
        2012.05 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        Fe doped TiO2 nanoparticles were prepared under high temperature and pressure conditions by mixture of metal nitrate solution and TiO2 sol. Fe doped TiO2 particles were reacted in the temperature range of 170 to 200˚C for 6 h. The microstructure and phase of the synthesized Fe doped TiO2 nanoparticles were studied by SEM (FE-SEM), TEM, and XRD. Thermal properties of the synthesized Fe doped TiO2 nanoparticles were studied by TG-DTA analysis. TEM and X-ray diffraction pattern shows that the synthesized Fe doped TiO2 nanoparticles were crystalline. The average size and distribution of the synthesized Fe doped TiO2 nanoparticles were about 10 nm and narrow, respectively. The average size of the synthesized Fe doped TiO2 nanoparticles increased as the reaction temperature increased. The overall reduction in weight of Fe doped TiO2 nanoparticles was about 16% up to ~700˚C; water of crystallization was dehydrated at 271˚C. The transition of Fe doped TiO2 nanoparticle phase from anatase to rutile occurred at almost 561˚C. The amount of rutile phase of the synthesized Fe doped TiO2 nanoparticles increased with decreasing Fe concentration. The effects of synthesis parameters, such as the concentration of the starting solution and the reaction temperature, are discussed.
        3,000원
        13.
        2011.10 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        The preparation of Y2O3-doped ZrO2 nanoparticles in Igepal CO-520/cyclohexane reverse micelle solutions is studied here. In this work, we synthesized nanosized Y2O3-doped ZrO2 powders in a reverse micelle process using aqueous ammonia as the precipitant. In this way, a hydroxide precursor was obtained from nitrate solutions dispersed in the nanosized aqueous domains of a microemulsion consisting of cyclohexane as the oil phase, with poly (oxyethylene) nonylphenylether (Igepal CO-520) as the non-ionic surfactant. The synthesized and calcined powders were characterized by thermogravimetrydifferential thermal analysis (TGA-DTA), X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The crystallite size was found to nearly identical with an increase in the water-to-surfactant (R) molar ratio. A FTIR analysis was carried to monitor the elimination of residual oil and surfactant phases from the microemulsion-derived precursor and the calcined powder. The average particle size and distribution of the synthesized Y2O3-doped ZrO2 were below 5 nm and narrow, respectively. The TG-DTA analysis showed that the phase of the Y2O3-doped ZrO2 nanoparticles changes from the monoclinic phase to the tetragonal phase at temperatures close to 530˚C. The phase of the synthesized Y2O3-doped ZrO2 when heated to 600˚C was tetragonal ZrO2.
        4,000원
        14.
        2011.08 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        Tin (IV) dioxide (SnO2) has attracted much attention due to its potential scientific significance and technological applications. SnO2 nanoparticles were prepared under low temperature and pressure conditions via precipitation from a 0.1 M SnCl4·5H2O solution by slowly adding NH4OH while rapidly stirring the solution. SnO2 nanoparticles were obtained from the reaction in the temperature range from 130 to 250˚C during 6 h. The microstructure and phase of the synthesized tin oxide particles were studied using XRD and TEM analyses. The average crystalline sizes of the synthesized SnO2 particles were from 5 to 20 nm and they had a narrow distribution. The average crystalline size of the synthesized particles increased as the reaction temperature increased. The crystalline size of the synthesized tin oxide particles decreased with increases in the pH value. The X-ray analysis showed that the synthesized particles were crystalline, and the SAED patterns also indicate that the synthesized SnO2 nanoparticles were crystalline. Furthermore, the morphology of the synthesized SnO2 nanoparticles was as a function of the reaction temperature. The effects of the synthesis parameters, such as the pH condition and reaction temperature, are also discussed.
        3,000원
        15.
        2011.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In general, zona pellucida (ZP) of the blastocyst has to be removed first, then either isolated the inner cell mass (ICM) or ZP-removed whole blastocyst, which is then cultured on the feeder layer to induce ICM outgrowth for the generation of embryonic stem cells (ESC). However, it is unclear whether ICM isolation before seeding on feeder layer is beneficial or not because the interaction between ICM and trophoblasts may affect cellular growth and/or pluripotency during the culture on the feeder. In the present study, two ZP removal methods (mechanically by splitting with a 28-gauge needle versus chemically by the treatment of acid-Tyrode's solution) and two ICM isolation methods (ZP-free whole blastocyst seeding versus mechanical isolation of ICM) were evaluated for the efficient isolation and culture of putative parthenogenetic bovine ESC. The number of maintained outgrown colonies was counted in each experimental group. As the result, mechanical removal of ZP with a needle and followed by whole ZP-free blastocyst seeding on feeder cells tended to attach more on the feeder layer and resulted in more outgrown colonies with its simple and less time-costing benefits. Currently we are generating ESC lines in HanWoo cattle by using this method for initial outgrowth of the parthenogenetic bovine blastocysts.
        4,000원
        16.
        2009.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Serial ultrasonography was performed to measure the normal appearance of uterine during estrous cycle and to determine whether the unterine appearance was related to the sex hormone, progesterone and estrogen. The uterine appearances, shape, diameter and echogenicity were daily monitored with ultrasonography in 9 Miniature Schnauzer dogs undergoing II estrous cycles. During proestrus and estrous, the uterus became hypoechoic but developed hyperechoic luminal echo. In the longitudinal view, the shape of the uterus occasionally changed from rectangular to coiled or serpentine, compared to other stages of the cycle. The diameter of the uterus during proestrus and estrous was larger (range: 0.600.86 mm) than other stages (range: 0.480.62 mm) of the cycle. The rising estrogen concentrations (range: 14.5116.86 pg/ml) in plasma during proestrus correlated with changes in the uterus (p<0.05). Progesterone concentrations were 0.080.15 ng/ml at the onset of proestrus, but rose 1.061.26 ng/ml at the end of proestrus. There was no relation to progesterone concentration from onset of estrus (p>0.05). There was dramatical changes in normal uterus and sex hormone during estrous cycle. Especially, the appearance, shape and diameter of uterus were related to plasma estrogen concentration during proestrus, correlated with other stages of the cycle.
        4,000원
        17.
        2009.02 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        Nano-crystalline hydroxyapatite (HAp) films were formed at the Ti surface by a single-step microarc oxidation (MAO), and HAp-zirconia composite (HZC) films were obtained by subsequent chemical vapor deposition (CVD) of zirconia onto the HAp. Through the CVD process, zero- and one-dimensional zirconia nanostructures having tetragonal crystallinity (t-ZrO2) were uniformly distributed and well incorporated into the HAp crystal matrix to form nanoscale composites. In particular, (t-ZrO2) was synthesized at a very low temperature. The HZC films did not show secondary phases such as tricalcium phosphate (TCP) and tetracalcium phosphate (TTCP) at relatively high temperatures. The most likely mechanism for the formation of the t-ZrO2 and the pure HAp at the low processing temperature was proposed to be the diffusion of Ca2+ ions. The HZC films showed increasing micro-Vickers hardness values with increases in the t-ZrO2 content. The morphological features and phase compositions of the HZC films showed strong dependence on the time and temperature of the CVD process. Furthermore, they showed enhanced cell proliferation compared to the TiO2 and HAp films most likely due to the surface structure change.
        4,000원
        18.
        2008.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        A preparation of NixMn1-xFe2O4 nanoparticles produced via the reduction of Nickel nitrate hexahydrate, Manganese (II) nitrate hexahydrate and Iron nitrate nonahydrate with hydrazine in Igepal CO-520/cyclohexane reverse micelle solutions was investigated. Transmission Electron Microscope (TEM), X-ray Diffraction (XRD) and Vibration Sample Magnetometer (VSM) analyses showed that the resultant nanoparticles increased the molar ration of water to Igepal CO-520 as the concentrations of Nickel nitrate hexahyrate, Manganese (II) nitrate hexahydrate and Iron nitrate nonahydrate increased. The average size of the synthesized particles calcined at 600˚C for 2hrs was in the range of 20 nm to 30 nm, and the particle distribution was broadened. The phase of the synthesized particles was crystalline, and the magnetic behavior of the synthesized particles was superparamagnetism. The effect of the synthesis parameters of the molar ratio of water to surfactant and the calcination temperature was discussed.
        3,000원
        1 2 3