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成惠淑,金光鎭 충남대학교 의과대학 지역사회의학연구소 1987 충남의대잡지 Vol.14 No.1
Orostachys malacophyllus F. has been applied in Chinese medicine as well as in folk remedy. Its chemical composition and pharmacological actions have not reported yet. But, sometimes, it was used in treatment for the stomach or lung cancer. This study was attempted to investigate the effects of the water fraction separated from alcohol extract of the plant on the renal functions of rabbits. After cannulation of carotid artery, jugular vein and ureters were prepared for the recording of blood pressure, the infusion of the water extract(0.005%) or the hypotonic saline(0.45%), and the collection of the urine, respectively. The hypotonic saline was infused to hydrate the rabbits, and the mixed solution of hypotonic saline, PAH, and inulin was infused to measure the glomerular filtration rate(GFR) and renal plasma flow (RPF). After the hydration, the changes of urine volume were obsereved during the infusion of the water fraction for 1 hour, and during the infusion of hypotonic saline for 80min. And the concentration of PAH or inulin in the urine and blood was measured by the method of Smith and the method of Schreiner, electrolyte concentration by flamephotometer, and the osmolar conentration by osmometer, respectively. The results were summarized as follows: 1. Urine volume, GFR, and RPF were decreased significantly by the infusion of water fraction, and thery were not recovered to control values after the exchange to hypotonic saline. 2. Filtration fraction was increased by water fraction. 3. Water fraction decreased the plasma clearances of electrolytes and the osmolar substances, and increased the negative free water clearance. 4. Water fraction increased the reabsorptive rate(%)of potassium, and decreased the excretory amount of Na or K. And it was decreased the ratio of Na/K excretion. From the above results, it was suggested that water fraction has the antidiuretic effect and its mechanism is primarily caused by the change of the renal hemodynamics.
Harvold activator의 효과에 관한 임상적 고찰
성재현,김광석 慶北大學校 齒科大學 1986 慶北齒大論文集 Vol.3 No.1
저자는 기능적 장애요인이 있는 상악 전치부 돌출을 주소로 내원한 환자 2명을 Harvold activator 로 치료하였다. 치료전후 두부방사 선규격사진을 분석 검토한 결과를 다음과 같이 요약할 수 있었다. 1. 하악골 전방성장 촉진으로 ∠ANB 의 감소가 있었다. 2. 상하악 제 1 대구치의 전방이동 및 정출이 있었으며 특히 하악에서 현저함을 보여 구치관계 개선에 도움이 되었다. 3. 상악전치는 설측경사 및 후방이동이 약간 있었다. 4. 하악전치는 전방이동은 많았지만 경사도는 거의 변화하지 않았다. The authors treated two patients by Harvold activator who chiefly complained the maxillary anterior protrusion. Analyzing the lateral cephalometric radiograph before and after treatment, the authors obtained following results. 1. Because of mandibular forward growth acceleration, ANB angle decreased. 2. Because of mesial movement and extrusion of upper and lower 1st molar especially lower 1st molar, molar relationship was improved 3. There were a certain degree of lingual tipping and backward movement of upper incisors. 4. Although there was a lot of forward movement of lower incisors, there was little change in tipping of lower incisors.
김대성,허광선,권민수,곽동호,원충상 忠州大學校 2010 한국교통대학교 논문집 Vol.45 No.-
There are various ways to operate traffic light system by varying the operational speed of the system. One of the solutions is to vary the length of the clock cycle of the system. It is difficult to vary the length of the signal in systems by varying the period of the clock cycle and nor it is a generalized technology in the current traffic systems. The traffic signal systems of the past used is simply a repetitive traffic signal system which traffic period is consistent, not considering the conditions of traffics. The system that will be introduced in this thesis could substantially improve efficiency of traffic flows by varying the length of traffic signal period with sensors which detect the presence of vehicles on both directions and allows the signal continuously on the direction where there are more waiting vehicles, and even skips the signal where there is no vehicle waiting. In this thesis, it introduces the methodology of detecting the spots that is detected by the sensors of the system and outputs green light in due order in accordance with the priority given to the system. In the meanwhile, the ratio of yellow light and green light is designed to be 1 to 8 in the way that maximizes the efficiency of traffic flows.
퇴비 및 액비 시용에 따른 수수×수단그라스와 이탈리안라이그라스 작부체계의 수량과 양분흡수량 및 토양 유효 질소 및 인 변화
임상선,이광승,전병준,이세인 全南大學校 農業科學技術硏究所 2011 農業科學技術硏究 Vol.46 No.-
This study was conducted to investigate productivity and nutrients uptake of Sorghum×Sudan grass (SSG) and Italian ryegrass (IRG) cropping system with cattle manure compost and liquid pig manure application, respectively. Changes in mineral N and available P concentration before and after each cropping were also examined. Dry matter yield ranged from 2.12 to 2.86 ton ha-1 for SSG and from 3.57 to 6.08 ton ha-1 for IRG. Forage productivity observed in this study was substantially lower than other studies probably due both to low precipitation during cropping season and to soil characteristics; lower pH (<5) and available P concentration (ranged from 98.6 to 174.8) than the soils used in the previous studies. The uptake of N and P also showed very similar pattern to dry matter yield; IRG had higher nutrients uptake than SSG. According to nutrient balance analysis, 76.4% of N and 76.9% of P2O5 applied to the fields (161 kg N ha-1 and 265 kg P2O5 ha-1) were not assimilated by SSG. For IRG, 50.2% (133 kg N ha-1) of N applied (265 kg N ha-1) was not taken up; meanwhile, the amount of P2O5 assimilated by IRG was 75 kg P2O5 ha-1, and this was 49 kg P2O5 ha-1 more than that of applied P2O5 (26 kg P2O5 ha-1) as liquid manure, indicating additional P uptake from the soils. Accordingly, mineral N (NH4 + and NO3 -) and available P concentrations of the soils increased after SSG harvest as compared with the soils before cultivation, but they decreased after IRG cultivation. Such differences in nutrient uptake by plant and soil nutrient availability could be attributed to the contrasting availability of nutrients in the compost and liquid manure. Organic forms of nutrients included in the compost is likely to be released slowly by decomposition of organic matter and thus the nutrients released could be utilized by the next crop (IRG) rather than by the crop (SSG) to which compost was applied. On the other hand, as most nutrients in liquid manure is readily available, N and P in the liquid manure could be assimilated by IRG. Therefore, it might be necessary to consider both compost (slowly available) and liquid manure (rapidly available) to achieve a goal production of forage.