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국산 Cheddar Cheese 의 숙성중 Casein 의 변화에 관한 연구
유제현,황주환,허정원 한국낙농학회 1986 韓國酪農學會誌 Vol.8 No.3
一般的인 Cheddar cheese의 製造方法에 따라 製造한 cheese를 10±2℃, RH 90±5%에서 熟成하면서 熟成過程別로 一般成分·pH·熟成度를 比較하고 cheese casein의 變化狀態를 starch-gel electrophoresis, densitometry와 Sephadex G-200 column chromatography에 의하여 變化過程을 규명하고자 하였다. 本 實驗에서 얻어진 結果는 다음과 같았다. (1) Cheese가 熟成됨에 따라 水分含量이 감소한 반면 蛋白質·脂肪·灰分含量이 增加하였다. (2) pH의 범위는 5.15∼5.30이었다. (3) 窒素化合物은 3, 4개월째에 급격히 增加하고 있으며 6개월째의 熟成度는 20.30이었다. (4) 電氣泳動 patterns에서 cheese casein은 熟成前 11개의 band에서 熟成이 경과함에 따라 15개의 band로 變化하였다. (5) Sephadex G-200에 의한 cheese casein의 分別은 熟成이 進行될수록 fraction I은 감소한 반면 fraction II는 증가하였으며, 熟成 2개월째부터 fraction III가 나타났다. This work was carried out to study the changes of cheese casein, gross components and nitrogen components during the ripening of Cheddar cheese. The fresh cheese was ripened for 6 months at ripening-room (10±2℃, RH 90±5%). The changes of Cheddar cheese casein were investigated by starch-gel electrophoresis, densitometry and Sephadex G-200 column chromatography. The results obtained were as follows: 1. The contents of protein, fat and ash of cheese increased in accordance with decreased of the moisture content. 2. The pH values were in the range from 5.15 to 5.30. 3. In case of nitrogen compound, especially they increased suddenly on the 3th, 4th month at ripening-room. Ripening degree of the cheese ripened on 6th month at ripening-room showed 20.30. 4. According to degradation of α_s-casein, β-casein and para-k-casein on starch-gel electrophoretic patterns, the caseins of the Cheddar cheese were changed diversely from 12 bands to 15 bands during the ripening periods. 5. In case of Sephadex G-200 column chromatography, fraction I decreased month by month, but fraction IIa, IIb increased and fraction III began to appear during the ripening.
유제현,김상민,정호정,황지효 대한고관절학회 2019 Hip and Pelvis Vol.31 No.2
Purpose: This study was performed to assess the radiologic and clinical results of U-blade Gamma3 nail use for the treatment of trochanteric fractures. Materials and Methods: Between September 2015 and May 2018, all patients aged 65 years and older who underwent surgery with U-blade Gamma3 nails were analyzed. A total of 129 patients were selected based on having at least six months of follow-up. Image evaluations included bone quality (T-score), fracture classification on plain radiograph (AO/OTA), computed tomography configuration, union period, position of lag screw, anatomical reduction, tip apex distance (TAD), sliding extent of lag screw, change of neck shaft angle, and complications leading to reoperations were analyzed. Functional outcome were assessed using the Koval grade (ambulatory ability) at the final follow-up. Results: The mean time to union was 19.7 (range, 6-36) weeks. The screw position was centric (93 cases; 72.1%) and anatomical reduction was achieved in 74 cases (57.4%). The mean TAD was 20.3 (range, 12.3-38.1)mm. The mean sliding length of the lag screws was 3.8 (range, 0.1-12.6) mm. The mean change of neck shaft angle was 3.4。(range, 0-12.8。). Reoperations were required in two cases (1.6%) due to the cutting out of the lag screw (n=1) and metal failure with U-blade bending (n=1). Finally, Koval grades for 49.8% of patients reached preoperative status. Conclusion: Overall, use of the U-blade Gamma3 nail led to favorable clinical results, suggesting that this system may be a good option for the treatment of trochanteric fractures.
Osteoporotic Fracture: 2015 Position Statement of the Korean Society for Bone and Mineral Research
유제현,문성환,하용찬,이동연,공현식,박시영,양규현 대한골대사학회 2015 대한골대사학회지 Vol.22 No.4
Osteoporotic fractures are one of the most common causes of disability and a major contributor to medical care costs worldwide. Prior osteoporotic fracture at any site is one of the strongest risk factors for a new fracture, which occurs very soon after the first fracture. Bone mineral density (BMD) scan, a conventional diagnostic tool for osteoporosis, has clear limitations in diagnosing osteoporotic fractures and identifying the risk of subsequent fractures. Therefore, early and accurate diagnosis of osteoporotic fractures using the clinical definition which is applicable practically and independent of BMD, is essential for preventing subsequent fractures and reducing the socioeconomic burden of these fractures. Fractures caused by low-level trauma equivalent to a fall from a standing height or less at major (hip, spine, distal radius, and proximal humerus) or minor (pelvis, sacrum, ribs, distal femur and humerus, and ankle) sites in adults over age 50, should be first regarded as osteoporotic. In addition, if osteoporotic fractures are strongly suspected on history and physical examination even though there are no positive findings on conventional X-rays, more advanced imaging techniques such as computed tomography, bone scan, and magnetic resonance imaging are necessary as soon as possible.