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        봉지종류 및 괘대시기가 ‘원황’ 및 ‘화산’ 배 과실의 수확기 품질에 미치는 영향

        정억근,이욱용,안영직,이혁재,황용수,천종필 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2

        We tested fruits quality and skin coloration of two pear cultivar ‘Wonhwang’ and ‘Whasan’ produced by bagging with different kinds of paper bags in the Cheonan area, Chungnam Province, Korea. The fruits were bagged at 35, 45, 55 or 65 days after full bloom (DAFB) with 3 kinds of double layer paper bag which consisted of grey color, yellow color and newspaper for outer layer. The great extent of light interruption was observed in grey colored outer paperbag among three kinds of paperbag which showed only 0.46% of lowest light transmittance when compared with 43.7% and 40.0% of yellow paper and newspaper, respectively. The development of skin redness (a*) increased with the delay of bagging time in two pear cultivars. But the fruits treated at 65 DAFB showed uneven coloration and excessive development of redness which represented low fruit external appearance value. Uniform flesh firmness was attained at the fruits bagged with grey outer color paperbag regardless of bagging time, although the fruit quality indices including soluble solids and titratable acidity did not change significantly by using different kind of fruit bags and bagging time in two pear cultivar. Based on our results, it was explained that the grey-colored fruit bag had positive effect on the development of skin coloration without any detrimental effect on fruit quality factors in ‘Wonhwang’ and ‘Whasan’ pears.

      • 지팡이의 높이가 체중 지지분포에 미치는 영향

        옥준영,김진우,한우석,한재덕,안덕현 한국전문물리치료학회 2000 한국전문물리치료학회지 Vol.7 No.1

        '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

        This study investigates the influence of cane length on the weight distribution of the elderly in a standing position. Thirsty participants were evaluated using two different cane lengths based on measurements of distal wrist crease to ground (WC cane), and distance of greater trochanter to ground (GT cane). A limloader was used to determine the weight distribution on the subject. It was found that 6.5% of body weight was supported on a GT cane and 7.7% of body weight supported on a WC cane in a standing position. Results suggests that more weight is distributed on a WC cane than a GT cane in the elderly.

      • 부산광역시 승용자동차 주행중 전신진동 및 소음도 평가

        옥치상,모현주,정재열 高神大學校保健科學硏究所 1997 보건과학연구소보 Vol.7 No.-

        There are many vibrations and noixes during vehicle use in urban although pavement road. Those are from engin vibarations, tire and wheel related vibrations. And the vibrations of vehicle use cause frequently las variation of road state. This study investivated the whole-body vibration and noise caused as variation of road state and speeds during automobile duiving in Pusan City, Korea Based on the results, exposure to whole body vibration and noise during vehicle use was higher at 70km/h than 50km/h in speed. On the floor of vehicle at speed 50km/h and 70km/h, the the mean values of energy equivalent acceleration and permissible exposure time by vebrational performance were 99.2cm/s²(1512.4 min), 200.3cm/s²(1939.5 min)in x axis ; 132.3cm/s²(1035.9 min),182.3cm/s²(1278.2 min) in y axis;87.1cm/s²(2774.6 min),234.8cm/s²(4196.4 min) in z axis, respectively. And on the seat of vehicle at speed 50km/h and 70km/hr,82.0cm/s²(597.1 min),63.2cm/s²(757.4 min), 157.2cm/s²(1286.8 min) in z axis, respectively. Permissible noise exposure time(PNET) caused during vehicle use were 80hr, 184hr in speed 50km/h and 57hr, 116hr in speed 70kn/h when doors were closed and open,respectively.

      • 분산 버퍼를 갖는 Self-Routing ATM 스위치에 관한 연구

        이옥재,정동수 群山大學校 1996 論文集 Vol.23 No.-

        In this paper, we propose a new self-routing ATM (Asynchronous Transfer Mode) switch with distributed buffers. This switch is composed of 1x2 binary switching elements and concentrators. Switch element has selfrouting characteristic being routed by destination address in the cell header. Concentrator is composed of running adder, reverse Banyan network and shifter. FIFO(First In First OUT) buffers, to improve their efficiency, are connected to the output of the shifter, and their address is gradually increased by running adder to avoid internal blocking. Though ATM cells with the same destination address are routed through switching elements blocking does not break out at the last stage because of buffers. So, we evaluate the performance of proposed switch and analysis the throughput and cell delay.

      • 중소도시 하수관거의 침입수량 및 수질오염 원단위 산정

        김옥형,박승기,정재훈,임경호 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-

        The volume of wastewater in combined sewers in study areas usually exceeds capacities of the sewer system or the treatment plant during storms. For this reason, combined sewer systems are designed to overflow occasionally and discharge excess waste water. The 6 monitoring sites were selected from two small cities near the Hongsung prefecture during over a rainy season. Monitoring was performed by collecting grab samples and by measuring the rainfall and flow rates during dry and wet seasons. Generally the flow rate of wastewater in combined sewers was rapidly decreased after 23:00 PM and gradually increased from 06:30 AM in all sites during the dry season. Due to monitoring and statistical analysis, the groundwater contributes on sewage volume increase (average 3.4-25.4% more) during experimental periods. Therefore, this research is focus on the investigation of the effects of stormwater and groundwater to combined sewer systems.

      • 玄胡索중 3級鹽基成分의 分離와 定量에 관한 硏究

        嚴東玉,金基德,李來洪,梁在憲,申台容 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

        A new application of specrophotometry for the isolation and determination of tertiary base in Corydalis Tuber was investigated. In order to establish the method for isolation and determination of tertiary base in the Corydalis Tuber. Tertiary base was isolated from Corydalis Tuber by organic solvent. When tertiary base was added to a solution containing cobaltous ion and excess thiocyan ion, yellowish-green, 1,2-dichloroethane-solube(base)_2Co(SCN)_4 precipitate. Supportive evidence for identification could be obtained by complexation with tetrathiocyanatocobaltate(Ⅱ) ion. The ultraviolet-visible spectrum of complex vompound in 1,2-dichloroethane exhibits maxima at 282nm and 624nm. The tertiary base was isolated from compex compound and identified as glaucine by UV-Visible spectrum and TLC. A tertiary base in 1,2-dichloroethane scanned from 200nm to 400nm qualitatively exhibits the same absorbance characteristics at identical wavelength as does isolated and concomitantly measured solution of a complex compound. The tertiary base components present in comples compound have been resolved on an absorbance solvent. And it is studied that the differential determination of tertiary base in Corydalis Tuber by spectrophometry. The tertiary base is determined by absorbance of colored products that is produced to reaction of tetrathiocyanatocobaltate(Ⅱ) ion under determination of tertiary base was possible to the range of glaucine 0.100mg/ml-1.000mg/ml in 1,2-dichloroethane. (maximum wavelength; 624nm) The calibration curve showed that the coefficient of variation was 0.9999% for glaucine. Also reproducibility tests showed that the coefficient of variation was 0.9999%. Arepid, specific and precise method using UV-Visible spectrophotometry and TLC has been developed for the isolation and determination of tertiary base in the Corydalis Tuber. The method was applicable to the isolation and determination of tertiary base in Corydalis Tuber or it's extract.

      • HPLC 시스템을 이용한 大氣中 多核芳香族 炭化水素의 定量에 關한 硏究

        정재필,황승만,박철용,백성옥 嶺南大學校 工業技術硏究所 1991 연구보고 Vol.19 No.1

        In this study, an analytical procedure was evaluated for the determination of atmospheric PAH, both in gaseous and particulate phases. The method involves Soxhlet extraction of the filters and Tenax adsorbent, followed by a clean-up stage using a silica mini column prior to analysis by reversephase HPLC with wavelength programmable fluorescence and UV detection. A total of 18 PAH were identified and quantified, all of which have been of environmental concern. In order to validate the methodology and to ensure compatibility of the results, the analytical method used for the determination of PAH was evaluatd with respect to the efficiencies of extraction and clean-up procedure, HPLC separation, and lower limits of detection. In addition, substrate dependency of PAH recovery was also investigated for the two type of filter(glass fiber and PTEF filters) and Tenax adsorbent.

      • Lorazepam製劑의 安定性에 관한 硏究

        梁在憲,嚴東玉 又石大學校 1983 論文集 Vol.5 No.-

        Lorazepam (7-chloro-5(0-chlorophenyl)-1.3-dihydro-3-hydroxy-2H-1.4-benzodiazepine-2-one) is a new minor tranquilizer of the benzodiazepine class. It is extensively used as a sedative and antianxiety agent in clinical practice. According to the pharmacology, Lozepam is superior to other benzodiazepines with respect to its anticonvulsant, muscle relaxing and antianxiety properties. The biological toxicity of Lorazepam is low and it's therapeutic index is high. For the research of Lorazepam preparation, we performed the tests of stability, high performance liquid chromatography, bioavailability, safety of five formulas of syrup and six formulas of injection of Lorazepam. Quantitative analysis of Lorazepam preparation is possible by spectrophotometric determination, but biological plasma level and impurity of thermolysis of Lozepam can be separated by using of high performance liquid chromatograph. To add saccharide in Lorazepam syrups is more effective for the prevention of thermolysis and sorbitol is more effective than other saccharides. Manufacturing Lorazepam injection, propyleneglycol is suitable to increase solubility of active ingredient and control of pH, and for stabilization of injection nicotinamide and PEG 1500 were more effective than other stabilizers. When Lorazepam syrup is orally administered to rabbit, it shows a high blood level after half an hour. Plasma level of Lorazepam is showed to be identical phase under various stabilizer when Lorazepam injection is intravenously administered to rat. It shows a substaining effect to add polyethylenglycol 400 and 1500 as stabilizer. PEG 1500 and Na_2S_2O_2 increased toxicity of Lorazepam injection, decreasing of LD_50 value in rat or mouse. Thiourea and nicotinamide have lower toxicity than other stabilizers in rate or mouse.

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