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      • 물 전해에서 압력 Sensor System을 이용한 초음파 영향에 관한 연구

        孫承佑,宋旼根,朱恩選 경상대학교 생산기술연구소 2002 工學硏究院論文集 Vol.2 No.-

        The production of hydrogen fuel depends basically on the water electrolysis. The ultrasonic effects the decrease of the overpotential in a water electrolysis. The study on the overpotential which activates the hydrogen production is the core to elevate the hydrogen production efficiency on the principle. A pressure sensor system by new ideas is developed and applied. Solutions are 4 kinds of KOH concentration such as 0%, 10%, 20%, and 30%. Two frequency bands of the ultrasonic transducer are 28㎑ and 2㎑. Characteristics of hydrogen production quantity according to the change of temperature with ultrasonic forcing are investigated and examined.

      • KCI등재

        인삼식초에 관한 연구

        안용근,김승겸,신철승 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.5

        5% 에탄올 용액에 인삼, 홍삼, 인삼박, 홍삼박을 가하여 Aceotbacter aceti 3281로 35℃에서 26일간 발효시켜서 인삼식초를 제조하였다. 인삼식초와 홍삼식초의 총당은 0.236㎎/ml 환원당은 0.236㎎/ml, 비중 1.005, 에탄올 함량 0.05%, 균체수 8058CFU/ml, pH .024, 산도 5011을 나타냈다. 물추출 홍삼박과 에탄올 추출 홍삼박의 총당은 1.27㎎/ml 및 1.60㎎/ml, 환원당은 0.077㎎/ml 및 0.727㎎/ml, 비중은 1.001 및 1.004, 에탄올은 모두 0.03%, 균체수는 8051 및 8.1CFU/ml, pH는 2.81 및 2.89%, 산도5.18 및 5.32, 물추출 홍삼박이 4.46, 인삼 및 홍삼은 4.20을 나타냈다. 침출식 식초는 10% 화이트 식초에 인삼, 홍삼, 홍삼박을 단계적으로 가하여 30일간 침출하여 제조하였다. 인삼 추출식초는 0.4∼1.6%, 홍삼 추출식초 0.8% 이상에서, 물추출 홍삼박 식초는 0.8∼1.6%, 에탄올 추출 홍삼박 식초는 0.4∼1.6% 사이에서 기호도가 가장 높았다. Ginseng-vinegars were produced by the fermentation of 5% ethanol solution contained ginseng, red ginseng, ginseng mare, and red ginseng mare, using Acetobacter aceti 3281 for 26 days at 35℃. The ginseng and red ginseng vinegar contained 0.236㎎/ml of total sugar, 0.236㎎/ml of reducing sugar and 0.05% of ethanol, and 1.005 of specific gravity, 8.58CFU of viable cell count, 3.24 of pH and 5.11% of acidity. Whereas, the vinegars produced using the water-extracted red ginseng mare and the ethanol-extracted red ginseng mare, were consisted of total sugar was 1.27㎎/ml and 1.60㎎/ml, reducing sugar was 0.077㎎/ml and 0.725㎎/ml, specific gravity was 1.001 and 1.004, the number of viable cells was 8.51CFU/ml and 8.1CFU/ml, pH was 2.81 and 2.89, acidity was 5.18% and 5.32%, respectively, ethanol concentration was 0.05% in both cases. In five-grade scoring test of sensory evaluation, it was estimated favorable that each vinegar, made by water-extracted red ginseng mare, ethanol-extracted red ginseng mare, ginseng, and red ginseng, scored 4.53, 4.46, 4.20, and 4.20, respectively. And extraction vinegar made from 0.1 to 12.8% of ginseng and red ginseng, from 0.5 to 32% of water- and ethanol-extract red ginseng was extracted with 10% white vinegar for 30 days. The best sensory vinegars were obtained that ginseng of 0.4∼1.6%, above red glnsend of 0.8%, water-extracted red ginseng mare of 0.8∼1,6%, and ethanol-extracted red ginseng mare of 0.4∼1.6% added in 10% white vinegar, respectively.

      • SCOPUSSCIEKCI등재
      • 물 전해에서 초음파에 의한 과전압 저감에 관한 연구

        宋旼根,孫承佑,朱恩選 경상대학교 생산기술연구소 2002 工學硏究院論文集 Vol.2 No.-

        The production of hydrogen fuel depends basically on the water electrolysis. The study on the overpotential which activates the hydrogen production is the core to elevate the hydrogen production efficiency on the principle. Characteristics according to the macroscopic effects of the ultrasonic are extracted to elevate the hydrogen production efficiency through measuring the hydrogen production quantity by using the electrolytic cell of the Hoffmann manner. For the above, several devices for measuring by new ideas are developed and applied. Characteristics on the overpotential decrease and the Debye phenomena are observed through the micro reaction by ultrasonic in electrolytic cell. For the above, the electrochemical analyzer, i.e., BAS is applied. Experiments with ultrasonic forcing into 4 kinds of solution such as city water, city water plus nitrogen, distilled water, and distilled water plus nitrogen are carried out. Various methods of ultrasonic forcing such as the improving method, the direct vibrating method, the indirect vibrating method, and etc., are applied as the transmissible method of ultrasonic force. The data base is constructed to design a new ultrasonic modern electrolyzer by using all the above data.

      • Poplar 組織培養에 의한 anthocyanin 生成

        李承雨,崔根元,鄭印植 경희대학교 유전공학연구소 1993 遺傳工學論文集 Vol.5 No.-

        Poplar(Populus nigra)를 대상으로 組織培養時 callus 生長과 anthocyanin形成에 影響을 미치는 環境條件으로써 最適培地, 糖의 效果, 植物生長調節劑, 糖의 種類 및 日長의 影響을 검토하고자 遂行한 결과는 다음과 같이 요약된다. 1. SH 培地가 callus 및 anthocyanin형성에 효과적이었고 sucrose濃度는 5.5%가 우수하였다. 2. Auxin류의 효과에 있어서는 2,4-D 2.0 ㎎/ℓ에서 callus 및 anthocyanin형성에 가장 효과적 이었다. 3. Cytokinin류에서 BA가 kinetin에 비하여 callus生育을 顯著하게 抑制하였고 kinetin 0.2㎎/ℓ에서 anthocyanin형성이 가장 우수하였다. 4. 糖의 종류로는 fructose가 sucrose나 glucose에 비하여 callus增殖에 월등히 높은 효과를 보였고 anthocyanin形成量에는 큰 차이를 보이지 않았다. 5. 日長의 效果에서 anthocyanin形成은 日長이 길어질수록 促進되었으며 callus형성은 日長에 따른 차이를 보이지 않았다. The experiments were conducted to optimize culture conditions for callus growth and anthocyanin formation by in vitro culture of Populus nigra through tests of basal media, inorganic salts, plant growth regulators, sucrose concentrations, sugar and photoperiods. SH media supplemented with 55 g/l sucrose gave the best results in callus and anthocyanin formation. For the effects of plant growth regulators, anthocyanin formation was promoted by treatment with 2.0 ㎎/l 2,4-D. On the other hand, 0.2 ㎎/l kinetin showed the highest activity for anthocyanin synthesis while BA severely suppressed callus growth. Fructose compared with glucose remarkably promoted callus growth but anthocyanin formation showed no difference with sugar type. Anthocyanin pigment accumulation hastened by increasing photoperiod in culture room while callus growth was not affected with photoperiod.

      • Agrobacterium을 이용한 고추의 형질전환체계개발

        최근원,박영두,박승국,전영주,유일웅,김인태,백운돈 경희대학교 생명자원과학연구원 1997 硏究論文集 Vol.18 No.-

        본 실험은 고추의 형질전환체 선발을 위한 최소의 항생제농도를 결정하고 그 결과를 이용하여 형질전환체를 유기하고 효율을 최대화하기 위하여 수행한 바 그 결과는 다음과 같다. 1. 항생제 감응성 검정결과 kanamycin 40㎎/ℓ와 hygromycin 20 ㎎/ℓ에서 신초형성이 완전히 억제되었다. 2. Agrobacterium 제거에 사용되는 carbenicillin과 cefotaxime 처리시 재분화에 아무런 영향을 미치지 않았으며 cefotaxime 200㎎/ℓ 처리에서는 무처리구보다 신초형성이 더 활발하였다. 3. 회복친인 135Q와 276F에서는 형질 전환시 높은 재분화율을 보였으나 형질전환율은 각각 10%와 11.1%의 낮은 빈도를 보였다. 4. 재분화된 신초들을 대상으로 histochemical GUS assay를 실시한 결과 부분적으로 푸른발색이 확인되었다. 5. GUS활성을 보인 신초들에 대한 NPTⅡprimer를 이용한 PCR검정에서 NPTⅡ 유전자의 존재가 확인되었다. A transformation system using Agrobacterium tumefaciens was developed with different genotypes of hot peppers (Capsicum annuum). Four antibiotics commonly used in Agrobacterium-mediated transformation were tested for their effects on shoot regeneration. Shoot induction was completely inhibited by kanamycin at 40㎎/ℓ and hygromycin at 20㎎/ℓ or higher, but not by carbenicillin and cefotaxime. Cotyledon explants of hot peppers were cocultivated with Agrobacterium turnefaciens LBA4404 which carries a binary. vector pBI121 harboring the neomycin phosphotransferase, type Ⅱ (NPT Ⅱ) gene and β-glucuronidase (GUS) gene. For selection of transformed cells, 40㎎/ℓ kanamycin were used because the sensitivity test showed that 40㎎/ℓ kanamycin completely inhibited shoot induction from nontransformed cells. Histochemical GUS assay showed the presence of the GUS gene and PCR analysis confirmed the NP TⅡ gene was integrated. Transformation frequency was about 10.0% and 11.1% of total regenerants from 135Q and 276F, respectively.

      • KCI등재

        감술제조에 관한 연구

        안용근,편재영,김승겸,신철승 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.5

        홍시를 살균처리하지 않은 것, 열처리 살균한 것, 염산처리 살균한 것과 염산처리 살균한 곶감 12%에 설탕 15% 용액을 17℃에서 36일간 발효시켰다. 무처리구와 염산처리구는 감에 부착되어 있던 유산균과 초산균으로 오염되어 산패되었다. 그래서 곶감의 산도는 4.4, 열처리한 것은 산도는 5.0, 산처리한 것은5.8, 무처리함 것은 13.5ml(0.1N NaOH/10ml sample)를 나타냈다. 에탄올 함량은 열처리구는 11.2%, 곶감은 10.0%, 산처리구는 9.4%무처리구는 6.1%였다. 가장 기호성과 안정성이 높은 것은 열처리하여 28일간 발효시킨 것이었다. 열처리구로 36일간 발효시킨 술은 총당 4.65%, 환원당 3.65%, 단백질, 0.03㎎/ml, 아미노산 0.17㎍/ml, pH 3.4, 펙틴 13.02㎍/ml, 균체수 5.75 logCFU/ml를 나타냈다. 곶감주도 기호성은 높았으나 발효속도가 낮았다. The possibility of wine making from soft and dried persimmon and the effects of treatment for persimmon on the quality of wine have been investigated. Soft persimmon was pretreated by two methods, of heat and hydrochloric acid treatment. Fermentation mash was composed of 12% persimmon and 15% of sucrose, and was fermented at 17℃ for 36 days. The fermentation using persimmons which were untreated and treated by acid was not successful because of contamination caused by lactic acid and acetic acid bacteria. Acidity of the fermented broth produced from boiled, dried, acid treated and untreated persimmon was 4.4, 5.0, 5.8 and 13.5ml(0.1N NaOH/10ml broth), respectively. Ethanol concentration of the fermented broth produced from boiled, dried, acid treated and untreated persimmon was 11.2, 10.0, 9.4 and 6.1%v/v, respectively. The wine fermented for 28day's fermentation using boiled persimmon as substrate had the best quality and stability. After 36 day's fermentation using boiled persimmon, following composition was obtained: 4.65% of total sugar, 3.65% of reducing sugar, 0.03㎎/ml of protein, 0.17 ㎍/ml of amino acid and 13.02 ㎍/m1 of pectin. The pH and yeast cell of the boiled persimmon broth were 3.4 and 5.75 logCFU/ml. Fermented wine using dried persimmon had also good quality but the fermentation rate was slow.

      • KCI등재후보

        GIFTED EDUCATION IN MONGOLIA: Current Status and Future Directions

        절자야 바야르사이한,한기순 순천향대학교 SCH특수아동교육연구소 2020 특수·영재교육저널 Vol.7 No.1

        The purpose of this study is to analyze the situation in Mongolia's gifted education and to define the current status and future direction of Mongolia's gifted education. There is almost no awareness of special education for the gifted within Mongolia. Currently, Mongolia recognizes the need for this and is seeking to put it into practice in earnest. This research introduces a system for structuring special education for the gifted within the Mongolian educational context, and talent development in the light of the above situation. The object of this study is to present a detailed search into concepts and policies for special education of the gifted in Mongolia. The study is organized into an examination of data and literature on the topic and is based on the most recent research of scholars who are promoting the need for special education for the gifted. This study investigates concepts for such education in the Mongolian educational system, which have been examined over a long period and presents factors that will lead to effective and adequate education, influence and transformation within the conventional educational system. Up until now, Mongolian education has followed the Russian system. However, recently Mongolia has also been studying other systems across the whole world and has reorganized its educational goals accordingly to improve the effectiveness of its educational program. This paper will be useful for the future development of policies for Mongolian special education for the gifted, and it is expected that this will provide basic and meaningful information, which will result in a better understanding of its programs and consequent development.

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