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Jeong Wonyoung,Kim Chulmin,Kim An-Na,Choi Younggi,Kim Jong Rae,Jeong Myeongsoo,Jeong Yoonhwa,Kim Joong-Hark 건강기능식품미래포럼 2021 건강기능식품미래포럼 학술지 Vol.1 No.4
Rapid increase of human population together with environmental changes to reduce crop yields are threatening human survival since these problems are expected to cause food shortage soon. Edible insects are getting attention as a new food resource that can solve forthcoming food shortages since they are particularly rich in protein and unsaturated fatty acids. Thus, when they are used as food, it is important to prepare the extract formulation with high yield of proteins and other nutritional components with minimal damage to them. In this study, 5 extraction methods were used, which were hot water (HW), autoclave (AT), high pressure treatment for 5 minutes (HP5), high pressure treatment for 10 minutes (HP10) and enzymatic hydrolysis (ENZ), and ten extracts were prepared by using one of these methods or combinations thereof. The extracts prepared were HW, AT, AT/ENZ, AT/ENZ/HW HP5/HW, HP5/ENZ, HP5/ENZ/HW, HP10/HW, HP10/ENZ, HP10/ENZ/HW, which were investigated for yields, molecular sizes of the components, amino acid (AA) composition and antioxidant activities. The extracts prepared using ENZ method were observed to contain high contents of total AA, high ratio of essential/non-essential AA and high antioxidant activity. Thus, ENZ method is recommended to prepare the high quality-extract of this insect.
정정호(Jeongho Jeong),김정훈(Junghoon Kim),지홍섭(Hongsub Jee),최원용(Wonyoung Choi),정채환(Chaehwan Jeong),이재형(Jaehyeong Lee) 한국신재생에너지학회 2021 한국신재생에너지학회 학술대회논문집 Vol.2021 No.7
최근 태양광 모듈 제작에 있어서 고출력을 내는 기술 중 하나인 슁글드 방식에 관한 연구가 활발히 진행되고 있다. 슁글드 모듈은 풀 셀을 사용하여 제작하는 기존 방식의 모듈보다 고출력을 낼 수 있는데 이는 동일 설치 면적에서 더 많은 수광 면적을 확보할 수 있기 때문이다. 그러나 기존의 모듈 제작에 사용하는 라미네이션 공정 조건은 슁글드 방식에는 적합하지 않은데, 슁글드 방식이 셀의 분할 및 접합 공정을 통해 제작되며 이로 인해 단차가 생기는 구조를 갖고 있기 때문이다. 최적화되지 않은 라미네이션 공정 조건을 통해 만들어진 모듈은 셀의 파손과 기포 발생 등을 일으키며 이는 모듈의 출력 저하 요소로 작용하게 된다. 본 연구에서는 이와 같은 문제점을 해결하기 위해 슁글드 모듈에 최적화된 라미네이션 공정에 대한 연구를 진행하였다. 셀의 파손 및 기포 발생을 해결하기 위해 EVA의 두께 및 라미네이션 공정의 최적화 연구를 하였으며, 제작된 모듈은 솔라시뮬레이터 및 EL 측정 장비를 통해 분석하였다.
최원영(Wonyoung Choi),김문수(Moonsu Kim),유현석(Hyeonseok Yoo),송연균(Yeongyun Song),정용균(Yong-Gyun Jeong),최진섭(Jinsub Choi) 한국표면공학회 2021 한국표면공학회지 Vol.54 No.6
The use of anti-corrosive oil (AC) is inevitable for production of industrial steels to prevent corrosion. The AC is degreased before application of steels, which crucially effects on final products, such as automobile, electricity etc. However, qualitative/quantitative evaluation of degreasing performance are steal insufficient. In this study, degreasing performance of anti-corrosive oil on steel have been studied through X-ray photon spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Commercial automotive steels (AMS) are coated with 4 different anti-corrosive oils (namely AC1-AC4). In XPS, intensity of C1s peak remained after degreasing indirectly indicates incomplete degreasing. Thus, higher C1s peak intensity means less effective degreasing by degreasing agent. peak intensity of C1s peak shows opposite tendency of peak intensity of O1s. We found that EIS analysis is not applicable to mild steel (such as AMS1) due to corrosion during measurement. However, alloy steel can be fully analyzed by EIS and XPS depth profile.
A Web-Based Decision Aid for Informed Prostate Cancer Screening: Development and Pilot Evaluation
Jung Wonyoung,Cho In Young,Jeon Keun Hye,Yeo Yohwan,Jun Jae Kwan,Suh Mina,Jeong Ansuk,Lee Jungkwon,Shin Dong Wook 대한의학회 2023 Journal of Korean medical science Vol.38 No.46
Background: Prostate-specific antigen-based routine screening is not recommended for the general population due to conflicting results with mortality reduction. We aimed to develop a web-based decision aid (DA) for informed decision making for prostate cancer screening. Methods: Using the International Patient Decision Aid Standards (IPDAS) development process model, we developed our DA based on patient and clinician interviews and multidisciplinary expert discussions. The prototype consisted of predicting individual prostate cancer risk and informed decision-making, including knowledge, risk and benefit, cost, personal value, and decision making. We conducted a pilot study on 101 healthy men, evaluating the effectiveness of DA by measuring knowledge, attitude, and intention to screen before and after using the DA, as well as decisional conflict and usefulness after using the DA. Results: Of the 101 participants (median age 60 [50–69] years), 84% had not undergone screening for prostate cancer in the past two years. After using the DA, knowledge on prostate cancer screening increased (mean score [of 10] before versus after: 6.85 ± 1.03 versus 7.57 ± 1.25; P < 0.001), and intention to not screen increased from 27.7% to 51.5% (P < 0.001), but attitude toward screening did not change (P = 0.564). After use of the DA, 79 participants reported no decisional conflict, and the usefulness score was high (mean score [of 100] 77.35 ± 7.69), with 85% of participants reporting that the DA helped with decision making. Conclusion: Our web-based DA yielded increased knowledge, decreased screening intention, and high perceived usefulness. These findings indicate potential clinical relevance, especially among younger individuals.