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Myung Syun Shim,Seong Youl Choi,Sang Kun Park,Oh Keun Kwon 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.6
Ardisia pot plants have been popularly marketed as an interior ground cover and a foliage pot plant because of its shiny red berries in winter season. This study was carried out to investigate the plant growth and nutrient absorption characteristics of Ardisia pot plants according to the growth stage and nutrient solution strength. The Sonneveld solutions were diluted to 0, 1/4, 1/2, and 1 times to make treatment solutions. The plants were examined at the vegetative (rooted cutting that have not flowered) and reproductive (more than one year old plant that have flowered) growth stage. A. pusilla showed no remarkable changes in plant growth according to growth stage and nutrient strength. The excess nutrients of the higher strength treatments of 1/2 and 1 times accumulated in the nutrient solution; therefore, the nutrient concentration of 1/4 times was the most effective treatment to economize nutrient supply and improve plant growth. However, some nutrients should be adjusted in the nutrient solution. The compositions of nutrient solution must be adjusted to supplement the contents of total nitrogen as calcium in leaves decreased during the flowering and fruiting. In A. japonica, the nutrient strength must be supplied in different levels according to the growth stage. The nutrient solution strength of 1 times was recommended at the vegetative stage and 1/4 times at the reproductive stage. The leaf contents of calcium and magnesium decreased in the nutrient treatments compared to control; so nutrient solution composition must be regulated for this two nutrients. The excess nutrients accumulated in the higher strength treatments of 1/2 and 1 times until 18 weeks, but the nutrients of ammonium, phosphate, potassium, and magnesium were absorbed suddenly after 18 weeks in these treatments. Therefore, supplementation of these nutrients during this period must be considered. According to this study, the needed nutritional conditions of the two plants in the same genus were different. Therefore, the nutrients must be supplied in the proper time for each plant to harvest high quality products.
Sang-Wook Lee(이상욱),Myung-Rae Cho(조명래),Byoung-Kwan Lee(이병관),Sang-Bong Ko(고상봉),Dong-Kyu Shin(신동규),Koing-Woo Kwon(권굉우) 대한정형외과학회 2004 대한정형외과학회지 Vol.39 No.5
목적: 대퇴 경부 골절 환자에서 수술시 고정을 위해 사용하는 유관 나사를 이용하여 향후 대퇴 골두 골 괴사의 예측 방법에 대하여 조사하였다. 대상 및 방법: 1999년 3월부터 2001년 2월까지 44명을 대상으로 최소 25개월 이상 추시 관찰하였으며, 평균 나이는 51세(18-76세)였다. 근위부에 삽입된 유관 나사의 두부에 있는 관으로부터 출혈 유무를 관찰하였는데, 출혈군은 38예, 비 출혈군은 6예였다. 추시에서 대퇴 골두 골 괴사는 단순 방사선 사진으로 판독하였다. 두 군에서 유관나사 부위의 출혈 유무와 무혈성 괴사의 발생 관계에 있어 민감성, 정확성, 양성 예측도, 음성 예측도를 조사하였다. 결과: 대퇴 골두 골 괴사는 7예(16%)에서 발생하였다. 출혈군은 38예 중 1예(2.6%), 비 출혈군은 6예 모두에서 대퇴 골두골 괴사가 발생하였다. 비 출혈군과 골두 골 괴사의 관계에서는 민감도 86%, 정확도 100%, 양성 예측도 100%, 음성 예측도가 97%였다. 결론: 대퇴 경부 골절 환자에서 추후 발생할 수 있는 대퇴 골두 골 괴사에 대한 예측 방법으로 수술 중 유관 나사의 두부관 출혈 유무가 단순하면서 유용한 방법으로 판단된다. Purpose: The aim of this study was to examine the validity of using cannulated screws as a method for predicting avascular necrosis of the femoral head after a fixation of fractures in patients with femoral neck fractures. Materials and Methods: Between March 1999 and January 2001, 44 patients with a femoral neck fracture that had been fixed with cannulated screws were enrolled in this study. The follow up period was more than 25 months and the mean age of the patients was 51 years (range, 18 to 76 year). Blood drainage in the holes of the screw head was checked. There were 38 cases in the bleeding group, and 6 cases in the non-bleeding group. The development of head necrosis was evaluated using plain radiography. The validity of the relationship between the two groups and head necrosis was evaluated by the sensitivity, specificity, the positive predictive value, and the negative predictive value. Results: An avascular necrosis of the femoral head developed in 7 cases (16%). Only one of the 38 patients in the bleeding group developed head necrosis (2.6%). However, all those in the non-bleeding group developed head necrosis (100%). The sensitivity was 86%, the specificity was 100%, the positive predictive value was 100%, and the negative predictive value was 97%. Conclusion: Bleeding from holes in the cannulated screws is a simple and accurate perfusion assessment for predicting the development of an avascular necrosis of the femoral head after a femoral neck fracture.