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성견에서 Acelluar dermal matrix가 1면 골내낭 결손부의 치주조직 재생에 미치는 영향
박주언,김병옥,박주철,장현선,Park, Ju-Un,Kim, Byung-Ock,Park, Joo-Cheol,Jang, Hyun-Seon 대한치주과학회 2006 Journal of Periodontal & Implant Science Vol.36 No.1
Although the main purpose of periodontal treatment to regenerate is the complete regeneration of periodontal tissue due to periodontal disease, most of the treatment cannot meet such purpose because healing by long epithelial junction. Therefore, diverse materials of resorbable and non-resorbable have been used to regenerate the periodontal tissue. Due to high risk of exposure and necessity of secondary surgical procedure when using non-resorbable membrane, guided tissue regeneration using the resorbable membrane has gain popularity, recently. However, present resorbable membrane has the disadvantage of not having sufficient time to regenerate date to the difference of resorption rate according to surgical site. Meanwhile, other than the structure stability and facile manipulation, acellular dermal matrix has been reported to be a possible scaffold for cellular proliferation due to rapid revascularization and favorable physical properties for cellular attachment and proliferation. The purpose of this study is to estimate the influence of acellular dermal matrix on periodontal ligament, cementum and alveolar bone when acellular dermal matrix is implanted to 1-wall alveolar bone defect. 4 dogs of 12 to 16 month old irrelevant to sex , which below 15Kg of body weight, has been used in this study. ADM has been used for the material of guided tissue regeneration. The 3rd premolar of the lower jaw was extracted bilaterally and awaited for self-healing. subsequently buccal and lingual flap was elevated to form one wall intrabony defect with the depth and width of 4mm on the distal surface of 2nd premolar and the mesial surface of 4th premolar. After the removal of periodontal ligament by root planing. notch was formed on the basal position. Following the root surface treatment, while the control group had the flap sutured without any treatment on surgically induced intrabony defect. Following the root surface treatment, the flap of intrabony defect was sutured with the ADM inserted while the control group sutured without any insertion. The histologic specimen was observed after 4 and 8 weeks of treatment. The control group was partially regenerated by periodontal ligament, new cementum and new alveolar bone. the level of regeneration is not reached on the previous formed notch. but, experimental group was fully regenerated by functionally oriented periodontal ligament fiber. new cementum and new alveolar bone. In conclusion, we think that ADM seems to be used by scaffold for periodontal ligament cells and the matrix is expected to use on guided tissue regeneration.
전력기기용, 에폭시/마이크로 실리카 및 알루미나 복합제의 전기적·기계적 파괴 강도 특성
박주언,박재준,Park, Joo-Eon,Park, Jae-Jun 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.7
In this study, we prepared 40, 45, 50, 55, 60, 65, and 70 wt% content composites filled in epoxy matrix for two micro silica and three micro alumina types for use as a GIS heavy electric machine. As a filler type of epoxy composite, micro silica composites showed excellent AC breakdown strength properties compared to micro alumina composites in the case of electrical properties of micro silica and alumina. The electrical breakdown properties of micro silica composites increased with increasing filler content, whereas those of micro alumina decreased with increasing filler content. In the case of mechanical properties, the micro silica composite showed improved tensile strength and flexural strength compared with the micro alumina composite. In addition, mechanical properties such as tensile strength and flexural strength of micro silica and alumina composites decreased with increasing filler content. This is probably because O-H groups are present on the surface of silica in the case of micro silica but are not present on the surface of alumina in the case of micro alumina.
해양 교란생물로 인한 굴과 우렁쉥이 양식장의 피해 현황 조사
박주언,이택준,김동현,김필재,김동건,신숙 한국환경생물학회 2017 환경생물 : 환경생물학회지 Vol.35 No.4
The Korean aquaculture industry was generally began in the 1970s and has gradually increased. Now, the number of households is about 7,068 and the scale of an aquaculture farm is about 248,014 ha; the value of all production in the industry is estimated to be about 1602.2 billion won. The aquaculture industry is very valuable and important for future food resources. However, the aquaculture industry was damaged by several marine ecological disturbance causing organisms. The Ascdiella aspersa colonized on the shell of scallop and then scallops were detached from rope. The patterns of damage in the aquacultures were observed in Tongyeong (oyster), Geojedo (oyster), and Gangneung (sea squirt) in June, 2017, as well as in Tongyeong (oyster) in November, 2017 by SCUBA divers. The species Halichondria bowerbanki, Bugula neritina, Mytilus galloprovincialis, Balanus amphitrite, Ascidiella aspersa, Ciona intestinalis, Didemnum sp, Styela plicata in Tongyeong, M. galloprovincialis, A. aspersa, C. intestinalis, D. vexillum, S. plicata in Geojedo, and M. galloprovincialis in Gangneung were all usually found in their farms. The marine ecological disturbance causing organisms gave rise to a reduced number of aquaculture products.
박주언,강석훈,원성두,노대영,김원형,Park, Joo Eon,Kang, Suk-Hoon,Won, Sung-Doo,Roh, Daeyoung,Kim, Won-Hyoung 대한불안의학회 2015 대한불안의학회지 Vol.11 No.2
Objectives : After disaster, some people develop posttraumatic stress sequelae such as posttraumatic stress disorder (PTSD), major depression, substance use disorders, and suicide. To date, numerous screening and assessment tools for behavioral health issues including mental health problems, psychosocial maladjustment and status of recovery after disaster have been developed. In this condition, one of important topics is to choose instruments that can quickly and accurately measure the issues. Methods : This article reviewed several self-reported scales in adults for disaster behavioral health, which were searched using academic search engines like PubMed, Scopus, KoreaMed and KISS from the earliest available date of indexing through January 31, 2015. Results : More than 40 eligible instruments evaluating the disaster behavioral health issues containing posttraumatic stress sequelae, psychological and social resources, non-disaster stress, and general functions were presented in terms of availability, effectiveness, and expeditiousness. Also, we introduced basic frame aiming on practical usage, which includes standard version and brief version of the instruments for disaster behavioral health. Conclusion : We suggest the accessibility and the applicability of assessment instruments for disaster behavioral health. The systemic review of this article will provide further directions for them. 재난 경험자들의 정신건강은 개인적인 측면뿐만 아니라 재난 이후의 지역사회의 회복 측면에서 매우 중요하기 때문에 개인적 수준과 사회적 수준 양쪽에서 접근해야 한다. 또한 재난 경험자들을 이해하고 돕기 위해서는 PTSD, 우울, 불안과 같은 정신 건강 분야뿐만 아니라 심리적 및 사회적 자원 분야, 물질남용 및 중독 분야, 비재난스트레스 분야, 기능상태 분야 등 다양한 방면의 평가가 필요하다. 재난정신건강 평가를 위해서 최소한 1시간 이내에 평가할 수 있는 표준 버전과 30분을 넘지 않는 단축 버전과 같은 기본적인 패키지가 필요하다. 임상 현장보다 재난 현장에서 시간 및 비용이 더 중요한 요소이고 재난 현장의 특성상 실현 가능성도 고려하여야 하기 때문에 이 모두를 고려한 구성을 해야 한다. 적극적인 재난정신건강의 다면적 평가를 통해 조기에 위험군을 선별하고 이를 적절히 관리한다면 재난 이후에 발생하는 외상후스트레스후유증을 최소화할 수 있을 것이다.
인천지역의 복원탄력성 평가 - (1) 복원탄력성 산정 모형 개발 및 평가 -
박주언,김덕환,김형수,Bak, Ju Un,Kim, Duck Hwan,Kim, Hung Soo 한국방재학회 2016 한국방재학회논문집 Vol.16 No.6
재해위험의 가능성과 피해액은 커져가고 있으나 지역사회에서의 대응역량은 한계를 나타내고 있다. 지역사회의 대응역량에 대한 전략으로 복원탄력성에 대한 관심이 증가하고 있다. 본 연구에서는 인천지역의 환경과 특성에 맞는 복원탄력성 지표와 지표별 가중치를 산정하였다. 지표별 가중치는 엔트로피, 설문조사, 요인분석 등의 방법을 사용하여 산정하였다. 또한 인천지역의 과거, 현재에 대한 정량적, 정성적 분석, 평가를 실시하였다. 이를 이용하여 복원탄력성에 대한 현실적이고 효과적인 대응방안을 마련한다면 안전하고 지속가능한 도시를 구축하는데 기여할 수 있을 것으로 판단된다. The possibility of disaster risk and damages are growing. But the response capacity in the community has a limitation. The interest of resilience is increasing as a strategy for the response capacity of the community. In this study, we calculated the resilience indicators and the weight of indicators for the environment and nature in Incheon. The weights of indicators are calculated using the method of entropy, survey and factor analysis. In addition, we conducted a quantitative and qualitative analysis, assessment of the current and past in Incheon, If we establish a realistic and effective response on resilience, we will can contribute to build a safe and sustainable city.
들깻잎 중 Afidopyropen(대사체 M440I007) 및 Pydiflumetofen의 수확 시기에 따른 잔류량 변화
박주언,임은지,우상원,박소현,배병진,정혜진,장유진,박종우,이근식,채석,김태화 한국농약과학회 2021 한국농약과학회 학술발표대회 논문집 Vol.2021 No.11
현재 우리나라는 2019년부터 농약허용물질목록고시제(Positive List System, PLS)를 전면시행하여 잔류허용기준 미설정 농약에 대한 잔류허용기준을 0.01 mg/kg으로 일괄 적용하여 관리하고 있다. 특히, 소면적 재배작물들은 재배면적이 작고 농약 사용량이 적어 농약 회사들이 등록을 기피하고 있어 잔류허용기준이 설정된 농약의 수가 제한적이다. 이에 본 연구는 소면적 재배작물인 들깻잎에 살충제 Afidopyropen 및 살균제 Pydiflumetofen의 잔류성을 구명하여 농약품목등록 자료 및 잔류농약의 안전성 평가를 위한 기초자료로 활용하고자 하였다. 시험농약인 Afidopyropen 2.5% 미탁제와 Pydiflumetofen 18.35% 액상수화제는 최근 개발된 농약으로서 소면적 엽경채류인 들깻잎에 2,000배 희석으로 Afidopyropen 및 Pydiflumetofen을 각각 7일간격 2회 및 3회 살포하여 잔류특성을 연구하였다. Afidopyropen, M440I007 및 Pydiflumetofen의 들깻잎에 대한 정량한계는 모두 0.01 mg/kg이었으며 회수율 시험은 LOQ, 10LOQ, 최고잔류농도 수준으로 각각 5반복으로 수행하였다. 각 농약의 회수율은 Afidopyropen 73.7~90.4%, M440I007 67.2~86.3%, Pydiflumetofen 72.8~90.8% 로 유효한 회수율 범위를 나타내었다. 최종약제 살포 후 각각 0, 1, 3, 5, 7, 10일 후 수확하여 잔류량을 산출한 결과 Afidopyropen의 합산잔류량은 최저 0.06mg/kg에서 최고 0.42mg/kg이었으며 Pydiflumetofen의 잔류량은 최저 12.22 mg/kg에서 최고 28.88 mg/kg이었고, 두 시험농약 모두 수확일차에 따라 감소하는 경향을 보였다. 이에 따른 반감기는 Afidopyropen은 약 5일이었으며, Pydiflumetofen은 약 9일이었다. 이러한 결과를 바탕으로 들깻잎에 대하여 Afidopyropen 및 Pydiflumetofen의 MRL이 현재 미설정 되어있어, 본 잔류시험의 결과를 토대로 MRL 및 안전사용기준을 Afidopyropen은 0.5mg/kg, 수확 7일 전 2회 경엽처리로 추천하였으며 Pydiflumetofen은 30.0mg/kg, 수확 7일 전 3회 경엽처리로 추천하였다.
위식도역류질환과 관련 없는 비심인성 흉통 환자의 우울 및 불안
박주언,류한욱,이풍렬,유범희,Park, Joo-Eon,Ryu, Han-Wook,Rhee, Poong-Lyul,Yu, Bum-Hee 대한불안의학회 2006 대한불안의학회지 Vol.2 No.1
Objectives : Non-cardiac chest pain (NCCP) can be divided into gastroesophageal reflux disease (GERD) related NCCP and non-GERD related NCCP. Our study was designed to examine the differences in clinical characteristics and psychological mood states between the two clinical syndromes. Methods : After some cardiologic evaluations such as treadmill exercise, coronary angiography, and echocardiography, 27 patients with NCCP were enrolled in this study. They were divided into patients with GERD related NCCP (12 patients) and those with non-GERD related NCCP (15 patients) using the upper gastrointestinal endoscopy and the ambulatory 24 hour esophageal pH monitoring. Clinical characteristics such as typical reflux symptoms and psychological mood states were measured. Patients who showed scores more than 10 on the Beck Depression Inventory (BDI) or Beck Anxiety Inventory (BAI) were defined as depressed or anxious group. Anxiety sensitivity Index (ASI) was also measured in all patients. All parameters were compared between patients with GERD related NCCP and those with non-GERD related NCCP. Results : The two groups showed a difference in typical reflux symptoms. Patients with non-GERD related NCCP had higher scores on the BDI, BAI and ASI than those with GERD related NCCP. Among all NCCP patients, 14 patients (51.9%) were suggested to have possible depression or anxiety disorders. Conclusion : The non-GERD related NCCP was shown to be associated with psychological mood states such as anxiety and depression. Thus, we suggest that routine measurement of psychological mood states should be necessary in the evaluation and treatment of NCCP.