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        공동주택 현장 실험을 통한 바닥복사냉방의 성능평가

        조영흠,임재한,석호태,여명석,김광우 대한건축학회 2004 대한건축학회논문집 Vol.20 No.11

        The objective of this study is to analyze the performance evaluation of the Radiant Floor Cooling and the dehumidification system included in the integrated system may be utilized as a supplementary cooling device through field experiments. The experiments are performed to evaluate the performance of the radiant floor cooling and confirm the possibility of continuous cooling through the actual field experiments, moreover, analyze specific characters of the radiant floor cooling system according to varying the load conditions which is able to happen to field. Experiment results show that the permissible ambient temperature range was determined by cooling load calculations, and the cooling capacity was calculated from steady-state heat transfer equations. Under these conditions, experiments were performed for an actual apartment building assuming two occupants. During 80% of the cooling period, radiant floor cooling provides sufficient and continuous cooling. The results of analyzing the indoor thermal environment in the actual apartment building show that the set room air temperature is maintained while the floor surface temperature, vertical temperature distribution and PMV remain within the comfort range.

      • 數種 脊椎動物 心臟筋 蛋白質에 관한 電氣泳動 比較 硏究

        권용훈,김지식 群山大學校 自然科學硏究所 1991 自然科學硏究 Vol.6 No.-

        실험동물인 참붕어(Pseudorasbora parva), 참개구리(Rana nigromaculate), 유혈목이(Natrix tigrix lateralis), 멧닭(Lyrurus tetrix ussuriensis), 돼지(Sus vittatus)의 심장근 구성 단백질의 특성을 비교 연구하기 위하여 SDS-PAGE와 Two-dimensional 전기영동법을 이용하여 단백질 영동 pattern의 특징을 규명하였고, amino acid analyzer을 이용하여 아미노산 조성을 분석하였다. 1) SDS-PAGE에 의한 영동 분획대는 참붕어, 참개구리, 유혈목이, 멧닭과 돼지에서 각각 26, 34, 32, 34 및 31개로 분리되었다. 2) 분자량 별로 본 band의 분포는 참붕어가 13-140 K daltons, 그리고 돼지가 13-140 K daltons 사이에 있음을 확인하였고, 각 실험동물의 심장근 단백질은 50-90 K daltons 사이에 많이 존재하므로서 심장근은 비교적 고분자량의 단백질로 구성되었음을 알았다. 3) 이차 전기영동에서 나타난 단백질 영동 spot은 참붕어, 참개구리, 유혈목이, 멧닭과 돼지에서 각각 23, 35, 48, 44와 39개로 나타났으며, 가장 많이 존재하고 있는 단백질은 분자량이 49-68 K daltons 사이에 있었다. 4) 심장근을 구성하고 있는 아미노산인 Asp., Thr., Ser., Glu., Ala., Val., Met., Ile., Leu., Thr., Phe., His., Lys., Arg.등 15종류로 분리되었으며, 멧닭에는 15종 전부가 존재하였고, 돼지는 Thr을 제외한 14종류가, 유혈목이는 Met, Ile을 제외한 14종류가, 참개구리에는 Val, Met, Ile, Leu, Tyr, Phe, Arg등이 제외된 8종류가, 그리고 참붕어에서는 Val, Met, Tyr, Phe, Arg 등이 제외된 11종류가 존재하였다. 이들 중에서 Asp, Gly, Glu, Ser이 비교적 많은량이 있었고, 반면 Met, Val, Ile, Leu 등은 소량 존재하고 있음이 규명되었다. To compare the characteristics of heart muscle protein form fish, frog, snake, chicken and pig, SDS-PAGE and Two-dimensional electrophoretec studies were preformed for protein patterns and analyzed their composition of amino acids by amino acids analyzer. 1. The mumber of protein bands by SDS-PAGE analysis were 26 for fish, 34 for frog, 32 for snake, 34 for chicken, and 31 for pig respectively. 2. The distribution of protein bands according to molecular weight conformed 13 to 140 K daltons in fish, 13 to 145 K daltons in frog, 13 to 140 K daltons in snake, 13 to 145K daltons in chiken, 13 to 140 K daltons in pig. Therefore heart muscle protein of experimental animals were composed of comparatively high molecular weight, as their protein band patterns were shown between 50 to 90 K daltons. 3. The number of protein spots by two-dimensional electrophoresis were 23, 35, 48, 44, and 39 in fish, frog, snake, chicken, and pig respectively and abundant spots were shown 49 to 68 K daltons. 4. Amino acids which consist of heart muscle protein of experimental animals were 15 kinds, that is Asp., Thr., Ser., Glu., Ala., Val., Met., Ile., Leu., Tyr., Phe., His., Lys., Arg., all 15 kinds amino acids were detected in chicken, but one amino acid(Tyr) in pig, two(Met., Ile.) in snake, 5 amino acids(Val., Met., Tyr., phe., Arg.) in fish, and 7 amino acids(Val., Mat., Ile., Leu., Tyr., phe., Arg) in frog were not detected in this experiment. Amino acids of heart muscle protein of experimented animal were composed mainly of Asp., Gly., Glu., and ser.m but small quantity was detected in care of Met., Val., Ile., and Leu.

      • 바닥복사냉방의 공동주택 현장적용에 관한 연구

        조영흠,임재한,여명석,김광우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

        The objective of this study is to analyze the applicability of the Radiant Floor Cooling integrated with dehumidification system through field experiments. The experiments are performed to evaluate the thermal environments and system operations according to varying the load conditions which is able to happen to field and show the available cooling source for radiant cooling system. The results of this study are as follows. 1) The radian floor cooling integrated with dehumidification system shows stable thermal environments and system operations in view of these aspects : control offset room air temperature, preventing condensation, stayed within the comfort range. 2) A supplementary cooling device can reduce the cooling time at the beginning because it can utilize radiant and convective cooling method. 3) The result of analyzing the change of the cooling water temperature in the actual apartment building shows that the system can operate according to the planning value.

      • 은행잎 플라보놀배당체에 대한 셀루라제류의 영향

        배기환,민병선,백흠영,안병준 충남대학교 암연구소 1991 癌共同硏究所 硏究誌 Vol.1 No.1

        The extractability and stability of ginkgoflavonolglycosides under presence of several cellulase preparations were investigated. The enzymes used were macerosin, cellulase C and cellulase NC. The content variation of the glycosides was measured with HPLC method, using caffeic acid as an internal standard. The methanol extract of ginkgo leaf, containing the total flavonolglyco-sides of 4.46%, was used for the content comparison. By extraction with the enzymes, each or mixed, the peak levels of all the glycosides began to decrease after 1 or 2 hours. After 24 hour extraction, most of the glycosides were degraded to minor components. The flavonolglycosides in ginkgo leaf were also hydrolysed simply by the water extraction. After 24 hour extraction with water at 40°C, the peak levels of major glycosides were distinctly decreased. Rutin was hydrolysed by enzyme treatment or by ginkgo leaf itself. As a result, it was concluded that the commercially available cellulases and the ginkgo leaf itself contain the activities of β-glycosidase and α-rhamnosi-dase. Kaempferol-3-0-(6' -0-p-coumaroylglucosyl)-rhamnoside and four other ginkgo flavonolglycosides were not hydrolysed under the same condition."

      • 고온 초전도체 Y₁Ba₂Cu₃O_7-δ(CdO)_x의 핵사중극 상호작용 연구

        전인,김복수,노태호,김영훈,서용문,송승기,박영민 명지대학교 자연과학연구소 2000 자연과학논문집 Vol.19 No.-

        CdO가 첨가된 고온 초전도체 Y1Ba2CU3O7-δ(CdO)x(x=0.00,0.09,0.22,0.34,0.42,0.49)를 고상 반응법으로 제작하여 상온에서 Cu 핵사중극 공명 실험을 하였다. 구리-산소 평면에 있는 63Cu(2)의 핵사중극 공명 진동수는 31.13∼31.39 MHz이고, 65Cu(2)의 공명 진동수는 28.82∼29.06 MHz이었다. 이러한 공명 진동수는 χ가 증가할수록 높은 진동수 방향으로 이동하였다. 63Cu(2)과 65Cu(2)의 NQR 공명 진동수의 비는 모든 시료가 1.08로 63Cu과 65Cu의 핵 사중극 모멘트의 비와 같았다. 구리-산소 사슬에 있는 63Cu(1)의 공명 진동수는 22.15~22.36 MHz에서 관측되었는데, χ에 따른 공명 진동수의 이동 경향은 63Cu(2)과 65Cu(2)의 경우와 비슷하였다. 선폭은 63Cu(2)과 65Cu(2)그리고 63Cu(1)의 경우 모두 약 200∼300 kHz고, 전반적으로 χ가 증가할 수록 감소하였다. 스핀-에코 방법으로 구한 스핀-스핀 이완 시간 T2는 χ가 증가함에 따라 약간씩 증가하였다. We have studied Cu-NQR in CdO-mixed high-Tc superconductor Y1Ba2Cu3O7-δ(CdO)x(x=0.00, 0.09, 0.22, 0.34, 0.42, 0.49) at room temperature prepared by solid state reaction method. In the Cu-O plane, 63Cu(2)-NQR frequencies were measured to be in the range of 31.13-31.39 MHz and those of 65Cu(2) were in the range of 28.82-29.06 MHz. The position of spectrum-peaks shifted to the higher frequency with increasing χ. The ratio of 63Cu(2) and 65Cu(2)-NQR frequencies have the value of 1.08 which is equal to the ratio of 63Cu(2) and 65Cu(2) nuclear quadrupole moment for all samples. The resonance frequencies of 63Cu(1) in the Cu-O chain have been observed in the range of 22.15-22.36 MHz and the tendency of resonance frequency behaviour with χ were nearly the same for both 63Cu(2) and 65Cu(2). The line-widths of 63Cu(2), 65Cu(2) and 63Cu(1) were observed to the value of 200∼300 kHz and they decreased with increasing χ. The spin-spin relaxation time T2 obtained by spin-echo method increased slightly with increasing χ.

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