결합조직형성 법랑모세포종의 방사선학적 소견 : 증례보고 3례

최다혜,허경회,문제운,이원진,허민석,이삼선,최순철,박관수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1

Desmoplastic ameloblastoma is a rare histologic variant of ameloblastoma. It shows important differences in anatomic distribution, histologic appearance, and radiographic findings compared with the general type of ameloblastoma. It is histologically characterized by an abundance of densely collagenous stroma and radiographically a mixed radiolucent-radiopaque lesion. We present three cases of desmoplastic ameloblastoma. All the patients complained on buccal swelling with or without pain and the sites of occurrence were the anterior and the premolar region. Plain radiographs showed mixed radiopaque-radiolucent lesion with ill-defined or diffuse sclerotic margin and no external root resorption. Additionally, CT scans revealed buccal expansion and relatively well-defined margin of the lesions. The clinical and radiographic features of the presented cases were compared with those of the desmoplastic ameloblastoma in the previous literatures. (Korean J Oral Maxillofac Radiol 2006; 36 : 63-8)

모유 수유아와 조제 분유 영양아에서 수유 방법에 따른 아미노산 농도 비교 및 혈청 트립토판 농도와 수면 유도와의 관계

정다운,김은영,양은석,박상기,박영봉,문경래 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.2

Objective: Sleep behavior is modulated by serotonergic neurons within the brain, and the synthesis and release of serotonin by such neurons is thought to be influenced by the availability of tryptophan, the amino acid precursor of serotonin. Formula-feeding infants have depressed plasma tryptophan concentration relative to breast milk-feeding infants. Because tryptophan alters sleep waking patterns in adults, a study was designed to determine the difference of sleep latency relative to differences in plasma tryptophan and tryptophan : large neutral amino acid (LNAA) ratio between formula-feeding infants and breast milk-feeding infants. Method: 45 newborns who were born in Chosun University Hospital from December 2002 to December 2003 were selected. The newborns were divided to three group, 15 newborns were fed breast milk and 15 newborns were fed formula A, and last 15 newborns were fed formula B. At 6 weeks and 12 weeks, infants were sampled for measuring of serum amino acid level and tryptophan, tryptophan : LNAA ratio. And we taught infants' parents to measure sleep latency that means the time after a feeding to the first episode of active REM sleep that persist ≥ 1 min. Result: 1) At 6weeks, Serum α-amino-n-butyric acid, citrulline, tryptophan level was higher in formula A group than breastmilk group (P<0.05) and proline level was lower than breast milk group (P<0.05). In formula B group, serum n-amino-n-buryric acid, citrulline, cystine, hydroxylysine, hydroxyproline, isoleucine, leucine, lysine, methionine, phenylalanine, taurine, threonine, valine levels were higher than breastmilk group (P<0.05). And Serum isoleucine, methionine, proline, valine level were higher in formula B group than formula A group (P<0.05). 2) At 12 weeks, serum glutamic acid, methionine, ornithine levels were higher in formula group A than breast milk group (P<0.05). Serum β-alanine, aspartic acid, α-amino-n-butyric acid, ethanolamine, glutamic acid, threonine level were higher in formula B group than breast milk group (P<0.05). Serum β-alanine, ethanolamine levels were higher and arginine level was lower in formula B group than formula A (P<0.05). 3) At 6 weeks, serum tryptophan concentration and tryptophan: LNAA ratio were higher in formula A group (P<0.05). Sleep latency was 21 minutes in formula group A, 24 minutes in breast milk group, 25 minutes in formula B group but there was no statistically significance (P>0.05). 4) At 12 weeks, serum tryptophan concentration and tryptophan: LNAA ratio, time after feeding to the first episode of active REM sleep were no difference with each other group. Conclusion: There is significant difference of serum amino acids between breast-feeding infants and formula-feeding infants. And serum tryptophan and tryptophan: LNAA ratio differ between brest-feeding infants and formula-feeding infants. But there is no association between serum tryptophan, tryptophan: LNM ratio and sleep latency.

시중에 판매되고 있는 아이스크림의 일반세균 및 대장균군 오염 실태

정다운,김영환,손종렬,변상훈 高麗大學校 倂設 保健大學 保健科學硏究所 2003 保健科學論集 Vol.29 No.1

Ice cream is a vastly consumed food enjoyed by a wide range of people. Therefore, it is easily accessible and amounts to hundreds of its kind. Ice cream is a ready-made food which could be served without undergoing cooking process and thus putting weight on its hygienic condition. And so we set out to conduct some research on the number of E-coli bactria contained in commercially sold ice creams. We applied Lactose broth method along with Desoxycholate agar method which enables us to verify the existence of E-coli bacteria and how much is contained. We focused our research on soft ice creams and aimed to seek out the degree to which they were contaminated by E-coli bacteria. 4 major distributors of soft ice cream out of 5 didn't meet the maximum allowance of E coli bacteria to be found. The number of general bacteria observed per 1 ㎖ of specimen must be held at less than 100,000, and this wasn't violated by any of the companies' samples. Yet on E-coli testing, all of K, L, B and M companies' samples respectively exceeded the permitted limits of bacteria to be detected.

디메틸포름아미드 노출 근로자의 요중 N-메틸포름아미드 분석시 GC-NPD와 GC-FID 방법간 비교

정다운,김현욱 가톨릭대학산업의학센타 산업의학연구소 1999 韓國의 産業醫學 Vol.38 No.1

This purpose of the this study was to compare the results of two analytical techniques, GC-NPD and GC-FID, of quantifying urinary NMF from 70 DMF exposed workers in synthetic resins, leather, and dye manufacturing industries. In addition, the relationship between conecntrations of airborne DMF and urinary NMF was investigated using samples collected from 12 workers. Airborne DMF was sampled using both charcoal and silicagel tubes. All urine specimens were collected both prior-to and at end-of workshifts. The results were as follows: 1. The detection limits of urinary NMF by GC-FID and GC-NPD were 0.043㎎/l and 0.009㎎/l, respectively. The recovery rates were 96.9% for the GC-NPD and 90.2% for the GC-FID methods. 2. Desorption efficiencies of DMF on Charcoal tubes were very poor with 32.96%, while those on silicagel tubes were marginally acceptable with 85.70%. 3. A statistically significant relationship between concentrations of airborne DMF and urinary NMF from 12 workers determined by GC-NPD (r=0.74) and by GC-FID (r=0.67) was observed. 4. Geometric mean concentrations of urinary NMF of the end-of-shift urines from 70 workers were 15.84㎎/g creatinine by GC-NPD and were 9.88㎎/g creatinine by GC-FID, respectivery. For the prior-to-shift samples, they were 6.05 ㎎/g creatinine by GC-NPD and 0.92㎎/g creatinine by GC-FID. These results of this study suggest that for collecting airborne DMF in the workplace, silicagel tubes should be utilized. For quantifying urinary NMF concentrations as a biological marker of DMF exposed workes, urine should be collected at the end-of-shift. Urinary NMF should be analyzed by GC-NPD because of its lower of detection and better precision than that of GC-FID.

제1유구치의 조기 상실로 인한 공간 변화에 대한 3차원적 분석

김지연,정다운,곽소연,유승은,박기태 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.2

본 연구는 제1유구치의 조기 상실 시 공간 변화에 대한 분석을 위하여 3-Dimensional Laser Scanner를 이용하여 그 유용성을 평가하고자 하는 예비논문이다. 6세-8세 사이의 제1대구치가 맹출하여 확실한 교합 관계를 이루는 혼합치 열기 어린이 중 편측 제1유구치의 조기 발치가 필요한 6명의 발치 전 후의 모형을 이용하여 다음과 같은 결과를 얻었다. l. 유구치 공간변화는 상악은 실험군과 대조군 모두 현저한 감소를 보이지 않았고, 하악은 실험군에서 3명 중 2명에서 공간감소가 관찰되었다. 2. 치열궁 너비,치열궁 둘레는 초기모형과 최종모형에서 비슷한 값을 보였다. 3. 협설측 경사도 변화는 유견치에서는 상하악 모두 특별한 경향을 보이지 않았으며,제2유구치는 상악은 실험군과 대조군이 유사하였고,하악에서는 3명중 2명에서 실험군이 더 큰 설측경사도 변화를 보였다. 제1대구치는 하악에서 실험군이 더 큰 설측경사도 변화가 관찰되었다. 4. 근원심 경사도 변화 측정에서 유견치는 상하악 모두 특별한 경향이 관찰되지 않았고 제2유구치의 경우 하악에서 실험군이 더 큰 근심경사도 증가가 보였다. 제1대구치는 상악에서 실험군,대조군 모두 원심 경사도가 증가되었다. The purpose of this study was to evaluate a 3-Dimensional laser scanner for the space analysis after loss of a primary first molar. Six children with premature loss of a primary first molar were examined using study models taken before and after the extraction. The results were as follows: 1. There was no change in primary molar space after the extraction of a maxillary primary first molar However, 2 out of 3 children experienced primary molar space loss in extraction side of a mandibular primary first molar. 2. Arch width and arch perimeter showed no difference between initial and final model. 3. All primary canines did not show any changes in inclination. Maxillary primary second molars had similar changes in both extraction and control side. However, 2 out of 3 mandibular primary second molars in extraction side showed more lingual tipping compared to control side. Mandibular permanent first molars tipped more lingually in extraction side. 4. In angulation, primary canines showed nothing of significance. Mandibular primary second molars tipped more mesially in extraction side than in control side. Maxillary permanent first molars have increased distal angulation after extraction of primary first molars in both side.

3차원 그래픽스를 이용한 실시간 로봇 모니터링 및 예측

김진구,정다운,전재욱 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1

In industrial automation lines, the main method to transfer information,, about robots is using some digital I/O in robot systems. Through these digital I/O, the state of each robot task is monitored whether it has been performed correctly or not. But this method can only communicate some informations among predefined states of each robot task and do no informations about other states during each robot task. In order to monitor detailed states of robot systems during each task, robot systems have used a video display or a graphics system. Some researches have used graphics systems to make real-time display and replay in addition to off-line simulation. This paper proposes a technique to monitor real time robot motions and to predict robot motions by using 3-d graphics. A graphics system is used to represent a virtual robot so that some c ordination between a real robot and this virtual robot can be achieved. With this coordination, monitoring and prediction of robot, motions will be performed.

Oral rehabilitation for a patient with oligodontia and maxillary hypoplasia

Da-Woon Chung,Mong-Sook Vang,Sang-Won Park,Hyun-Pil Lim,Hong-So Yang 대한치과보철학회 2009 The Journal of Advanced Prosthodontics Vol.1 No.1

An 18 year old female with oligodontia and maxillary hypoplasia was treated using an interdisciplinary team approach involving orthodontists, maxillofacial surgeons and prosthodontists. Full mouth one-piece fixed partial dentures were the final restoration. The fixed partial dentures fabricated for the maxilla and mandible using the concept of a shortened dental arch resulted in improved esthetics and the masticatory function. This paper describes the treatment procedures for an oligodontia patient with alveolar bone hypoplasia.

A new journey to predict the prognosis of diabetic kidney disease

( Da Woon Kim ),( Sang Heon Song ) 대한신장학회 2023 Kidney Research and Clinical Practice Vol.42 No.4

Development of a Motor Driven Rowing Machine with Automatic Functional Electrical Stimulation Controller for Individuals with Paraplegia; a Preliminary Study

Da-Woon Jung,박대성,이범석,Min Kim 대한재활의학회 2012 Annals of Rehabilitation Medicine Vol.36 No.3

Objective To examine the cardiorespiratory responses of patients with spinal cord injury (SCI) paraplegia using a motor driven rowing machine. Method Ten SCI patients with paraplegia [A (n=6), B (n=1), and C (n=3) by the American Spinal Injury Association impairment scale] were selected. Two rowing techniques were used. The first used a fixed seat with rowing achieved using only upper extremity movement (fi xed rowing). Th e second used an automatically moving seat,facilitating active upper extremity movement and passive lower extremity movement via the motorized seat (motor rowing). Each patient performed two randomly assigned rowing exercise stress tests 1-3 days apart. Th e work rate (WR), time, respiratory exchange ratio (R), oxygen consumption (VO2), heart rate (HR), metabolic equivalents (METs), and rating of perceived exertion (RPE) were recorded. Results WR, time, VO2, and METs were significantly higher after the motor rowing test than after fixed motor rowing test (p<0.05). HR after motor rowing was signifi cantly lower than fi xed rowing (p<0.05). Conclusion Cardiorespiratory responses as VO2, HR and METs can be elicited by the motor rowing for people with paraplegic SCI.

A Challenging Study to Identify Target Proteins by a Proteomics Approach and Their Validation by Raising Polyclonal Antibody

Da Woon Jeong,Beom Young Park,Jin Hyoung Kim,In Ho Hwang 한국축산식품학회 2011 한국축산식품학회지 Vol.31 No.4

This study was conducted to validate the theoretical feasibility of a technique to identify biomarkers in Korean native black pig (KNP) and a commercial Landrace breed. Using two-dimensional electrophoresis, we found six proteins (NADH dehydrogenase Fe-S protein 1, an unnamed protein product, similar to T-complex protein 1, annexin V = CaBP33 isoform, fatty acid-binding protein, and catechol O-methyltransferase), which appeared in KNP alone. We raised polyclonal antibodies (used as the primary antibody) for Western blotting to confirm the characteristics of the six KNP proteins. As a result, catechol O-methyltransferase, annexin V = CaBP33 isoform, and the unnamed protein product presented thicker bands in KNP than those in Landrace. Moreover, catechol O-methyltransferase was shown to be more feasible as a biomarker for KNP. However, cross-reactivity was observed with the polyclonal antibodies for KNP and the other three proteins (NADH dehydrogenase, a protein similar to T-complex protein 1, and fatty acid-binding protein). This study only showed limited results from a limited number of animals; however, our research suggests possibilities for future studies.