딥러닝을 활용한 적조 판별

조민정(Min Jeong Cho),백상수(Sang-Soo Baek) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

농촌 노인의 스트레스와 주관적 구강건조감의 관련성: 예비조사

조민정 ( Min-jeong Cho ),이은 ( Eun Lee ),염유식 ( Yoosik Youm ),김현창 ( Hyeon Chang Kim ),정은경 ( Eun-kyung Jung ),김진경 ( Jin-kyung Kim ),송근배 ( Keun-bae Song ),최연희 ( Youn-hee Choi ) 대한예방치과·구강보건학회 2017 大韓口腔保健學會誌 Vol.41 No.4

Objectives: Stress is a psychological reaction to stimuli such as anxiety or threat felt by a person either physically or mentally when placed in a difficult situation. Although a relationship between stress and dry mouth has been reported, it remains understudied. The purpose of this study was to investigate the association between stress and subjective dry mouth among the elderly living in a rural region. Methods: A total of 214 people aged ≥60 years living in a rural area were recruited with an informed consent for a cross-sectional analysis. Information about stress and subjective dry mouth was obtained by an interview survey with a constructed questionnaire. Data on other potential confounding factors (including oral factors) such as socio-demographic data, health-related behaviors, the number of remaining teeth, and subjective chewing ability were also gathered at the same time. Logistic regression models were used to analyze the relationship of stress and dry mouth using SPSS. Results: The Crude odds ratio (OR) of stress awareness affecting subjective dry mouth was 2.59 (95% confidence interval: 1.43-4.68). After adjusting for sex, education, income, smoking, and alcohol intake, the adjusted OR was 2.52 (95% confidence interval: 1.30-4.87) which was statistically significant. Conclusions: Elderly people who were stressed had an approximately 2-fold increase in experiencing subjective dry mouth when compared to their stress-free counterparts.

자외선 경화형 아크릴계 점착제의 단량체 및 올리고머 함량이 실크 스크린의 인쇄성 및 점착력에 미치는 영향

조민정(Min-Jeong Cho),강호종(Ho-Jong Kang),김동복(Dong-Bok Kim) 한국고분자학회 2017 폴리머 Vol.41 No.2

자외선 경화형 아크릴계 단량체의 함량을 조절하여 디스플레이 모듈 접합에 사용할 수 있는 점착제를 중합하고 점착 물성 및 실크스크린 인쇄성을 평가하였다. 2-ethylhexyl acrylate(2-EHA)와 아크릴 산(AA) 93:7 비율을 기본처방으로 하여 점착력을 갖도록 하였으며, 기본 처방에 스크린 탈착성 향상을 위한 butyl acrylate(BA), 점착력 향상을 위해 2-hydroxyethyl acrylate(2-HEA)와 tetrahydrofurfuryl acrylate(THFA)를 각각 추가하였다. 기본처방에서 BA의 함량이 7 phr 이상일 때 타래길이는 급격히 감소하고 점착력은 증가하였다. 2-HEA가 3 phr 이상에서 접촉각은 작아지고 폴리카보네이트(PC)에서의 점착력이 감소하는 경향을 보였다. 실크스크린 인쇄 시 직진성과 인쇄퍼짐을 개선하기 위해 THFA를 시럽에 첨가함에 따라 2-HEA가 14 phr의 경우, 점착제의 인쇄성이 저하되는 것으로 나타났다. 결과적으로 기본 처방에 BA 7 phr, 2-HEA 3 phr 및 THFA 7 phr를 첨가했을 때 인쇄성이 가장 양호하였다. For application to display module junction, silk screen printing based on UV-curable acrylic adhesive was studied. Monomers were based on 2-ethylhexyl acrylate (2-EHA) and acrylic acid (AA) 93:7, butyl acrylate (BA), 2-hydroxyethyl acrylate (2-HEA) and tetrahydrofurfuryl acrylate (THFA) added for screen detachability and adhesion, respectively. When the ratio of BA in monomers was added above 7 phr, adhesive was less smeared the screen and spreading length of adhesive decreased, and its adhesion increased. As 2-HEA was added above 3 phr, contact angle decreased and peel strength also decreased on polycarbonate (PC) substrate. When 2-HEA ratio was 14 phr with THFA was added for screen printability include linearity and printing width, the printability of adhesive showed to decrease. As a result, BA 7 phr, 2-HEA 3 phr, and THFA 7 phr with based monomers had good printability.

재활용 PET(polyethylene terephthalate)를 이용한 PBT(polybutylene terephthalate)올리고머 제조

조민정 ( Min Jeong Cho ),양정인 ( Jeong In Yang ),노승현 ( Seung Hyun Noh ),조홍제 ( Hong Jae Joe ),한명완 ( Myung Wan Han ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.4

재활용 PET (Poly ethylene terephthalate)로부터 PBT (Poly butylene terephthalate)를 생산할 수 있는 새로운 방법을 모색하였다. 이 방법은 PET와 BD (1,4-butanediol)의 에스테르 교환반응을 통하여 BHBT (Bishydroxybutylterephthalate)올리고머를 생성하는 글리콜리시스 반응과 BHBT의 축합 중합 반응을 통하여 PBT 올리고머를 생성하는 축중합 반응으로 이루어져 있다. 이를 통해 단기 수명 주기 제품인 버려지는 PET 페자원을 장기 수명 주기 제품인 PBT로 변환시켜 더 가치 있고 바람직한 재활용을 하고자 하였다. 본 연구에서는 글리콜리시스와 축중합 촉매로 zinc acetate를 사용하였고, 글리콜리시스 반응에 대하여 회분식 반응기와 반 회분식 반응기를 적용하여 성능을 비교하였다. 이를 위하여 생성되는 에틸렌글리콜(EG)의 양을 정량하여 해중합도를 추정할 수 있는 EG 수율과 부산물인 THF 생성량을 성능 척도로 하였다. 반응 도중에 EG를 제거하는 반회분식 반응기의 성능이 회분식 반응기에 비하여 보다 우수한 것으로 나타났다. 또한 반회분식 반응기의 경우 최적의 반응조건은 BD/PET 비율 4, 반응온도 220 oC 이었으며, 최고 EG 수율은 91% 이었다. 또한 축 중합 반응이 진행됨에 따라 PBT 올리고머의 분자량이 증가하는 것을 보였다. A new route for PBT (Poly butylene terephthalate) production from recycled PET (Poly ethylene terephthalate) has been explored. The route consists of glycolysis of PET (Poly ethylene terephthalate) wastes using 1,4-butandiol into BHBT oligomers and polycondensation of the oligomers into PBT oligomer. This process uses post-consumer or post-industrial recycled PET and converts it into high-end PBT type engineering thermoplastic via a chemical recycling process. Zink acetate was used as a catalyst for both glycolysis and polycondensation. Two types of reactor for the glycolysis, batch and semi-batch reactor, were investigated and their performances were compared. Semi-batch reactor removes ethylene glycol (EG) and THF (tetrahydrofuran) during the reaction. Amounts of EG and THF generated during the glycolysis reaction were measured and used as criteria for the reactor performance. Performance of semibatch reactor was shown to be better than that of batch reactor. Optimum reaction condition for the semi-batch reactor was BD/PET ratio of 4, and reaction temperature of 220℃, giving high EG yield (max 91%) and low production of THF. In addition, it was confirmed that the molecular weight of PBT oligomer increases in accordance with the progress of the polycondensation reaction.

노인들의 의치 사용이 MMSE-K 점수에 미치는 영향

조민정 ( Min Jeong Cho ),박동옥 ( Dong Ok Park ),송근배 ( Keun Bae Song ) 한국치위생학회(구 한국치위생교육학회) 2016 한국치위생학회지 Vol.16 No.2

Objectives: The purpose of the study was to investigate the association between denture wearing and dementia using a Mini-Mental State Examination (MMSE-K) in the community dwelling elderly. Methods: The study subjects were 184 community dwelling elderly using Korean version of mini-mental state examination(MMSE-K). The variables included the general characteristics of the subjects, denture earing, number of mastication tooth, subjective mastication ability, and MMSE(dementia). Denture wearing was divided into two groups of the natural dentition including the fixed prosthesis and removable denture including the complete and/or partial denture. The data were analyzed by χ2 test, t-test, and binary logistic regression using SPSS version 22.0 program. Logistic regression was used to analyze the association of MMSE-K score and denture wearing, and 95% confidence interval was calculated. The subjective mastication ability was measured by Likert 5 points scale. Dementia was measured by MMSE-K. Results: There was a significant association between MMSE-K score and denture wearing. The odds ratio(OR) of denture waering was 6.01(95% CI: 2.824-12.784). After adjusting the age, gender, residence and education, OR was 5.53(95% CI: 2.364-12.935). Conclusions: This study showed a significant association between MMSE-K score and denture wearing in the Korean elderly.

복합종균을 접종하여 발효한 메주의 특성

조민정 ( Min Jeong Cho ),심재민 ( Jae Min Shim ),이재용 ( Jae Yong Lee ),이강욱 ( Kang Wook Lee ),야오좡 ( Zhuang Yao ),류샤오밍 ( Xiaoming Liu ),김정환 ( Jeong Hwan Kim ) 한국미생물생명공학회(구 한국산업미생물학회) 2016 한국미생물·생명공학회지 Vol.44 No.2

대두에 B. amyloliquefaciens 2 균주들과 P. farinose SY80, 그리고 R. oryzae 총 4 균주를 접종한 메주를 만들었다(메주 1). 대조구로 B. subtilis KACC16450과 A. oryzae를 접종한 메주(메주 2)와 볏짚을 균원시료로 접종한 메주(메주 3)들을 제조하여 총 56일 발효시켰다. 발효 기간중 메주 1과 2의 pH와 적정산도는 메주 3보다 각각 높고 그리고 낮았다. 메주의 혈전용해능은 메주 1이 가장 높았다. 발효 기간중 모든 메주에서 B. cereus는 검출되지 않았으나 메주 2와 3에서 여러 모양과 색을 띈 잡균들이 검출되었다. 메주 2에서 histamine이 그리고 메주 3에서 tyramine이 저 농도로 검출되었으나 메주 1에서는 둘 다 검출되지 않았다. B. amyloliquefaciens EMD17이나 MJ1-4와 같은 항균력 균주들을 접종하여 메주를 제조하면 미생물학적으로 보다 안전한 장류제품들 생산이 가능할 것이다. A test meju (meju 1) was prepared by inoculating two strains of Bacillus amyloliquefaciens (EMD17, MJ1-4), Pichia farinosa SY80, and Rhizopus oryzae into cooked soybeans. A control (meju 2) was prepared by inoculating Bacillus subtilis KACC16450 and Aspergillus oryzae. Another control (meju 3) was prepared using rice straw as the source of microorganisms. Three different mejus were fermented for 56 days outdoors. Meju 1 and meju 2 showed higher pH values than meju 3, whereas meju 3 showed higher titratable acidity than meju 1 and meju 2. Meju 1 showed the highest fibrinolytic activity. Bacillus cereus was not detected in any mejus, but various microorganisms were detected in meju 2 and 3. Histamine was detected in meju 2 and tyramine in meju 3 at lower concentration, which were not detected in meju 1. It was concluded that microbially safe, fermented soybean products could be produced from meju fermented with starters such as B. amyloliquefaciens EMD17 and B. amyloliquefaciens MJ1-4.

대사증후군과 자기기입식 설문도구를 이용한 치주건강의 관련성

조민정 ( Min-jeong Cho ),심지선 ( Jee-seon Shim ),김현창 ( Hyeon-chang Kim ),송근배 ( Keun-bae Song ),최연희 ( Youn-hee Choi ) 대한구강보건학회 2016 大韓口腔保健學會誌 Vol.40 No.4

Objectives: Many recent studies have suggested that several systemic conditions, such as obesity, hypertension, hyperlipidemia, and diabetes, are related to periodontitis. The aim of this study was to investigate whether any particular metabolic syndrome component correlates with the periodontal status. Methods: This study analyzed data from 501 adults (age range, 30 to 64 years) who completed a general physical examination and an oral-health-related questionnaire between January 2014 and June 2014. Periodontitis was already used by the validity and reliability has been proven questionnaire. Multiple logistic regression analysis was used to assess the association between metabolic syndrome and the presence of chronic periodontitis. Results: Among the 501 participants, 81 (16.2%) had metabolic syndrome and 91 (18.2%) had chronic periodontitis. The prevalence of chronic periodontitis was 28.40% (23/81) and 16.19% (68/420) in the participants with and without metabolic syndrome, respectively. The association remained significant after adjusting for sex, age, education, income, occupation, and smoking status; the adjusted odds ratio was 2.03 (95% confidence interval, 1.11 to 3.71). Conclusions: A significant association exists between metabolic syndrome components and the periodontal status.

PRECEDE 모형을 이용한 구강건강의 영향요인에 대한 진단적 연구

조민정 ( Min Jeong Cho ) 한국치위생학회(구 한국치위생교육학회) 2013 한국치위생학회지 Vol.13 No.3

Objectives : This study aimed to improve school health program by investigation of several variables through educational diagnostic factors which influence the level of subjective oral health perception and DMFT of students on the basis of PRECEDE model. Methods : A total of 286 high school students in Busan completed the self-reported questionnaire from September 3 to 28 in 2012. Results : 1. Social and epidemiologic diagnosis suggested that the level of subjective oral health perception of male students was not better than that of female students and DMFT number of the male was more than that of the female(p<0.001)(p<0.001). 2. Oral health diagnosis indicated that once a day tooth brushing group showed lower level of oral health perception(p<0.001) and high DMFT number(p<0.001). 3. Predisposing factor of educational diagnosis implied that more than 4 times a day snack intake group and sweet diet and soda friendly group showed lower level of oral health perception and high DMFT number(p<0.001). 4. Tooth brushing of the reinforcing factors had the most important effect on the level of oral health perception and the number of dental caries. Daily snack intake was the most important effect on DMFT number. Conclusions : The informed consent from each family was the important factor in implementing PRECEDE model. School health program improved oral health care. Oral health program can correct the risk oral health behavior in children and adolescents.

유아의 정서지능, 어머니의 또래관리전략, 가정환경이 유아의 또래유능성에 미치는 영향

조민정(Min-Jeong Cho),문혁준(Hyuk-Jun Moon) 가톨릭대학교 생활과학연구소 2015 생활과학연구논집 Vol.34 No.1

In this research we investigated the effect of social demographic factor (especially childs gender and mothers job occupation), emotional intelligence of child, mothers peer relationship management strategy and home environment on the childs peer competence. Participants in this study were in total 319 five-years-old children, recruited from five child care facilities located in Seoul and Kyung-gi-do. SPSS WIN 17.0 program was used for the analysis of T-test, pearsons correlation and regression for the collected data, and the analysis results are as follows. Firstly, the gender of child and job occupation of mother had significant correlation with the child peer competence. Secondly, it was shown that childs peer competence has relation with childs emotional intelligence, mothers peer management strategy and home environment. Children with better self and others emotion usage, self emotions recognition and expression, emotion control and impulse suppression, peer relation skill and relation with teacher showed better peer competence. Thirdly, relative impact analysis showed that childs emotional quotation had most significant impact on childs peer competence, while mothers peer management strategy and home environment showed the second and third impact respectively.

노인의 기능 치아 수와 구강건강평가(GOHAI)와의 관련성

조민정 ( Min Jeong Cho ),정은경 ( Eun Kyung Jung ),신해은 ( Hae Eun Shin ),신아라 ( Ah Ra Shin ),조화영 ( Hwa Young Jo ),최연희 ( Youn Hee Choi ),송근배 ( Keun Bae Song ) 한국치위생학회 2016 한국치위생학회지 Vol.16 No.3

Objectives: The purpose of the study was to investigate the association between remaining functional teeth and oral health-related quality of life using Geriatric Oral Health Assessment Index(GOHAI) in the elderly. Methods: A self-reported questionnaire was completed by 237 female elderly in Daegu from May to September, 2015. The questionnaire consisted of general characteristics of the subjects and Geriatric Oral Health Assessment Index(GOHAI). A total of 216 female elderly data were analyzed for oral health status and their GOHAI score. Data were analyzed using SPSS 23.0 version. Logistic regression analysis showed the association of functional teeth and GOHAI score. Results: Number of functional teeth can affect oral health related quality of life in the elderly. When functional teeth is small, the odds ratio(OR) was 2.119(95% CI: 1.215-3.696). After adjusting age, residence type and education, OR was 1.900(95% CI: 1.060-3.399). Policies to preserve natural tooth should be recommended for increasing quality of life in general. Conclusions: This study showed significant association between number of functional teeth and the GOHAI score of the elderly women.