Periapical multilocular osteoporotic bone marrow defect

Jung, Yun-Hoa,Cho, Bong-Hae,Nah, Kyung-Soo 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4

A case of osteoporotic bone marrow defect, which appeared as a well-defined multilocular radiolucency overlapping the roots of mandibular right second molar, was reported. On periapical radiograph, a daughter cyst-like radiolucency was seen at the anterior margin of the lesion making it difficult to rule out odontogenic keratocyst.

저체중 또는 과체중 청소년에서 캠프 프로그램을 이용한 영양 교육효과에 관한 연구

성미경,승정자,류화춘,박재년,박동연,최미경,조경옥,최선혜,이윤신,김유경,이은주 대한지역사회영양학회 2003 대한지역사회영양학회지 Vol.8 No.4

This study was performed to evaluate the effectiveness of a nutrition education program developed for nutritionally imbalanced adolescents. A summer nutrition camp was held for 23 overweight and 16 underweight subjects. Its effectiveness with regard to was evaluated at the end of the camp and 6 months later. Nutrition knowledge, nutritional attitude, food behavior, nutrient intake, exercise habit and ideal body figures desired by the subjects. The results showed significantly higher nutrition knowledge scores at the end of the camp as compared to those obtained prior to the camp program, and these scores were maintained for at least six months. Nutrition attitude scores also improved after the education program, and these improved scores also lasted for 6 months. However, the food behavior scores measured 6 months after the education program were not significantly different from those obtained prior to the camp. Also, the exercise habit, the ideal body figures and the body figures desired by the subjects remained unchanged. When nutrient intakes of subjects were assessed before the program and 6 months later, the mean daily vitamin C intake was significantly increased after the education program. Also, the intake of iron from plant food sources increased in the overweight subjects, while less iron from animal source were consumed by the underweight subjects. Both groups tended to consume more vegetables and fruits 6 months after the education program which may have contribute to the higher vitamin C and plant-based iron intakes. These results indicate that a 4-day nutrition education camp program sustained changes in nutrition knowledge and nutrition attitude for 6 months. The increased intake of vegetables and fruits was also achieved through this education program. However, changes in dietary behavior in adolescents may require repeated education.

동맥경화에 의한 하지 허혈증 환자에서 Subintimal Angioplasty의 효과 : 단기 추적 결과를중심으로

윤상섭,허윤정,최승혜,박종경,이성,송경섭 대한혈관외과학회 2003 Vascular Specialist International Vol.19 No.2

Cone Beam형 전산화단층영상을 이용한 상악대구치 발치 후 상악동 함기화 평가

정연화,나경수,조봉혜 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.3

Purpose : The purpose of this study was to examine the inferior expansion of the maxillary sinus floor following maxillary molar extraction. Materials and Methods : Cone beam computed tomographic images of 59 subjects were used to evaluate the height difference of the maxillary sinus floor between extraction sites and contralateral dentate sites. The height of the maxillary sinus floor was defined as the vertical distance to the Frankfort plane from the level of the anterior nasal spine to the most inferior point of the sinus floor. We examined the difference in sinus pneumatization according to the number of missing teeth and the vertical relationship of the molar roots to the sinus floor. Results : The inferior expansion of the maxillary sinus floor was 1.20±1.86 mm on the maxillary first molar and 1.90±2.42 mm on the maxillary second molar. Increased expansion was observed in cases where two proximate molars were extracted. There was no significant difference in sinus pneumatization following extraction according to the vertical relationship of the molar roots to the sinus floor. Conclusion : The results of this study confirm that sinus pneumatization occurs following maxillary molar extraction. In situations where pneumatization can affect treatment after molar extraction, three-dimensional radiography should be considered. (Korean J Oral Maxillofac Radiol 2009; 39 : 109-13)

만성신부전 환자에서 발생한 파종결핵

정가영,나선경,윤혜원,송하응,류정화,류동열 이화여자대학교 의과학연구소 2013 EMJ (Ewha medical journal) Vol.36 No.1

Patients with chronic renal failure (CRF) are known to be more susceptible to tuberculosis infection due to impairment of the host defense mechanism. Although extrapulmonary tuberculosis is more prevalent in those subjects and it may induce dismal outcome, its diagnosis has been challenging since there is no specific symptoms of the disease and the clinical course is usually atypical. Herein, We report a case of disseminated tuberculosis diagnosed by ultrasound-guided liver biopsy in a 31-year-old CRF patient presenting sustained fever despite broad-spectrum antimicrobial therapy and progressive cholestatic jaundice.

가미과루해백황금탕의 항고지혈증 효과

정은아,김윤경,김남재,김동현,이상인 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2001 No.-

Gamigwaruhaebaekwhanggum-Tang (GGHWT) have been evaluated for antihyperlipidemic effects on experimental hyperlipidemic rats and mice induced by Triton WR-1339, corn oil and high cholesterol-diet. Especially, GGHWT is formulated with Trichosanthis Fructus, Pinelliae Tuber, Aurantii Immaturus Fructus, Magnoliae Cortex, Allii Macrostemi Bulbus, Cinnamomi Ramulus and Scutellariae Radix. Oral administration of GGHWT at 500 mg/kg/day for 3 days significantly inhibited the increase of serum triglyceride and LDL-cholesterol, liver triglyceride in hyperlipidemic rats induced by Triton WR-1339. And, GGHWT significantly inhibited the increase of serum triglyceride in hyperlipidemic rats induced by corn oil. Also, administration of GGHWT (500 mg/kg, once daily for 1 week, p.o.) prevented the increase of serum total cholesterol, triglyceride, LDL-cholesterol, liver total cholesterol and triglyceride in 1% cholesterol-diet fed mice. These results suggest that GGHWT is effective for the treatment of hyperlipidemia.

콘크리트 포장의 플라이애쉬 재활용 방안연구

정영화,최성용,윤경구,용석응,김태경 강원대학교 석재복합신소재제품연구센터 1998 석재연 논문집 Vol.3 No.-

한국 대부분의 고속도로는 콘크리트로 포장되고 있으며, 플라이애쉬를 포장용 콘크리트에서 재활용하면 콘크리트의 성능을 향상시킴과 동시에 경제적 이익과 환경보호에 큰 기여를 할 것이다. 본 연구에서는 플라이애쉬를 포장 콘크리트에 재활용하고자, 플라이애쉬 치환율, 물-시멘트비, 굵은골재 최대치수를 주요실험 변수로 하여 이들이 플라이애쉬를 혼입한 포장용 콘크리트의 역학적 특성에 미치는 영향을 살피기 위해서 실험하여 통계처리 분석하였다. 이러한 분석결과를 바탕으로 포장 콘크리트의 적정배합을 제시하였으며 결과는 다음과 같다. 플라이애쉬를 혼입한 포장콘크리트의 휨강도에 영향을 미치는 인자는 플라이애쉬 치환율이 가장 큰 것으로 나타났으며, 다음으로 굵은골재 최대치수와 물-시멘트비 순으로 영향을 미친다. 또한, 플라이애쉬 치환율과 굵은골재 최대치수의 상관관계가 가장 큰 것을 알 수 있었다. 목표압축강도를 목표 휨강도의 6배로 선택하여 적정구간을 결정하였으나, 적정배합구간이 목표압축강도에 의해서 결정되었다. 이는 플라이애쉬의 작은 수화물이 공극을 효과적으로 채움으로써 휨강도의 증진에 크게 기여하기 때문으로 판단된다. 고속도로 포장에 적용할 수 있는 32mm의 굵은골재 최대치수와 45%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 5.0%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.5%까지 치환 가능하다. 공항 포장에 적용할 수 있는 40mm의 굵은골재 최대치수와 37%의 물-시멘트비를 사용하는 목표 휨강도 45kg/㎠의 적정배합에서는 4.5%까지 플라이애쉬를 치환 가능하고, 50kg/㎠의 적정배합에서는 2.0%까지 치환 가능하다. The most of highway in Korea have been paved by concrete since last ten years. The recycling of fly ash in pavement concrete may result in economics, the improvement of concrete quality and the reservation of environment. This paper focused on the series of experiment and statistics analysis with experimental variables such as fly ash substitute ratio, water-cement ratio and maximum size of coarse aggregate in order to investigate the feasibility of recycling of fly ash in pavement concrete, to see the strength characteristics and t propose the optimum mix design based on previous results. The results of experiments and analysis were follows; The fly ash substitute ratio affected most seriously to the flexural strength of concrete among main variables, followed by maximum size of coarse aggregate and water-cement ratio. The interaction between fly ash substitute ratio and coarse aggregate size was the biggest. The optimum mix design was determined by target compressive, which was selected as 6 times of flexural strength. This indicated that the small hydrate of fly ash in concrete filled in effectively and resulted in the enhancement of flexural strength. the optimum mix design for highway pavement concrete with 32mm of maximum size of coarse aggregate and 45% of W/C can incorporate up to 5.0% and 2.5% of fly-ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively. The optimum mix design for airport pavement concrete with 40mm of maximum size of coarse aggregate and 37% of W/C can incorporate up to 4.5% and 2.0% of fly ash at 45 kg/cm² and 50 kg/cm² of target flexural strength, respectively.

발도르프 학교의 교사교육

정윤경 교육철학회 2002 교육사 교육철학 Vol.27 No.-

This article aims at exploring Waldorf teacher training. It seems that Waldorf teacher training is a crucial element for success of Waldorf school today. Waldorf schools devote the education integrating thinking, feeling and doing capacities of children. They, therefore, require a teacher as an artist. The main features of Waldorf teacher training, which may affect Korean teacher training, are as follows. First, Waldorf teachers follow a continuing path of self-education. The fact that each school teachers is committed to teach the entire curriculum and teach different grade each year for 8 years is both stimulating and demanding. Through a continuing inner awakening and self-development, they nourish the enthusiasm for teaching. Second, Waldorf teacher training course integrate artistic and partial activity through the curriculum as a method of educating the whole child. Third, Waldorf teacher training is closely related to waldorf school.

반복적인 급성 신부전을 유발한 호산구성 장염 1 예

정혜진;김현태;김유선;정현걸;강윤경;문정섭 인제대학교 2011 仁濟醫學 Vol.32 No.-

Eosinophilic gastroenteritis is a rare disorder of unknown etiology characterized by presence of gastrointestinal symptoms, eosinophilic infiltratio n of one or more parts of gastrointestinal tract without involvement of other organs and absence of parasitic infestation. The clinical presentation depends on the extents and depths of eosinophilic infiltration. Mucosal involvement may result in abdominal pain, nausea, vomiting, diarrhea and weight loss. We report a case of eosinophilic enterocolitis in a 55-year-old female presented with abdominal pain and watery diarrhea resulting in recurrent acute renal failure.

프리캐스트용 고성능 콘크리트의 내구특성 검토

정영화,윤경구,용석응,김형균 강원대학교 부설 석재복합신소재 제품연구센터 1999 석재연 논문집 Vol.4 No.-

포장용 콘크리트는 열악한 환경조건에 의해 손상을 받지 않을 정도의 충분한 내구성을 가지고 있어야 한다. 포장 콘크리트는 실질적으로 겨울철에 제설제로 인한 동해를 받는 열악한 환경에 놓이기 때문에 동결-융해에 대한 손실을 쉽게 받을 수 있다. 이 연구에서는 폴리프로필렌 섬유를 혼입한 포장 콘크리트의 내구특성을 검토하여 현장적용가능성을 검토하기 위하여 섬유종류, 섬유혼입율, 콘크리트 배합종류를 주요 실험변수로 하여 실내시험을 수행하였다. 이를 위하여 먼저 폴리프로필렌 섬유보강 콘크리트의 압축강도시험을 통하여 강도특성을 분석하고 박 저항성 시험을 통하여 내구특성을 분석하였다. 박리저항성 시험은 국내에서 제설제로 사용하고 있는 4%의 염화칼슘을 콘크리트시편 표면에 유지시켜 동결-융해 사이클을 진행시켜 매5사이클마다 겉보기 등급과 무게변화를 측정하였다. 그 결과, 압축강도는 섬유 혼입율이 증가할수록 증가하였으며, 망사형 섬유보다는 단사형 섬유가 강도증진에 효과적임을 확인할 수 있었다. 박리저항성은 섬유의 혼입율이 증가할수록 모든 배합에서 우수한 것으로 나타났다. 무게 변화는 모든 배합에서 단사형 섬유와 망사형 섬유 모두 혼입율이 증가할수록 무게 손실량이 섬유를 혼입하지 않은 시험편에 비해 1.85∼27.5%로 감소하는 것으로 나타나 박리저항성 증진에 효과적임을 확인할 수 있었다. 폴리프로필렌 섬유보강 콘크리트의 강도특성의 내구특성을 분석한 결과 고속도로 배합인 경우 단사형 섬유와 망사형 섬유 모두 혼입율 0.10%에서 강도와 내구성 증진효과가 가장 우수한 것으로 나타났다. 강도특성과 내구특성을 분석한 결과, 내구특성이 보통 콘크리트보다 내구특성이 우수하여 현장적용이 가능한 것으로 나타났다. Pavement concrete subjected to severe environmental condition may be vulnerable to frost attack practically where de-icing chemicals are used. This study focused on the investigation of durability characteristics of pavement concrete incorporating polypropylene fibers and application feasibility of these into the pavements of local roads and highway. A series of labortory tests were performed with main experimental variable such as fiber types, fiber contents and type of concrete mix. The test of compressive strength was executed as primary tests, before the durability tests such as a scaling resistance were performed. De-icing salt resistance test was progressed by recycling freeze and thaw in the presence of a 4% calcium chloride solution. The deteriorated surfaces were rated by visual inspection and the loss weight were measured at every 5 cycles. The compressive strength of polypropylene fiber reinforced concrete increased as the fiber contents increased. The loss of weight decreased by 1.85∼27.5% compared to those of plain concrete as the fiber contents increased in the all kind of concrete mix. Thus de-icing salt scaling resistance of polypropylene fiber reinforced concrete increased as the fiber contents increased in the all concrete mix. From the results of strength and durability of polypropylene fiber reinforced concrete, it was concluded that they may be applied to the pavement of local roads and highway due to their excellent durability characteristics superior to those of plain concrete.