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The Characteristics of Biocoal with Mixed Organic Waste by Hydrothermal Carbonization
( Woori Cho ),( Byeong Oh Go ),( Jai-young Lee ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
As ocean dumping, which is the highest proportion of sewage sludge disposal methods, is prohibited, it is urgent to develop efficient and stable treatment methods for sewage sludge. Sewage sludge contains high moisture and a large amount of organic substances. So it is easy to decay and it can cause secondary pollution during recycling. Sewage sludge is necessary to remove the moisture by applying heat at high temperature because of the coagulant. And fuel value is low because of low calorific value and energy efficiency. Therefore, hydrothermal carbonization was used for efficient treatment of sewage sludge, and biocoal was produced by mixing the roadside tree waste to expand the recycling bounds. The purpose of this study is to understand basic characteristics of sewage sludge and roadside tree waste as basic data for recycling. As a result of biocoal by mixed organic waste, the fuel properties decreases as sewage sludge content increases. Especially, as the mixing ratio of sewage sludge increased, the ash content exceeded the standard value of 35%, which is considered to be difficult to use as fuel. Therefore, it can be used as renewable energy if proper mixing ratio and reaction conditions are used.
Efficacy test of CETP inhibitor candidates (DN2019) using CETP-apoB100 transgenic mice
Woori JO,Heejaung KIM,Hee Young LEE,Hyun Ho YUN,Mi Jeoung CHOE,Kyung-ku KANG,Min-soo Seo,Soong-Hyun Kim,Hee Jong Hwang,Eunhye Lee,Sungwoo Lee,Minsoo Song,Woo Suk KOH,Kil-Soo KIM 한국실험동물학회 2018 한국실험동물학회 학술발표대회 논문집 Vol.2018 No.7
Woori Na,Jiyu Kim,Bong Hee Chung,Dai-Ja Jang,Cheongmin Sohn 한국영양학회 2020 Nutrition Research and Practice Vol.14 No.4
BACKGROUND/OBJECTIVES: Given the increasing proportion of the Korean population that is aged 65 years and older, the present study analyzed the relationship between diet quality and sarcopenia in elderly persons by using data from the 2008–2011 Korea National Health and Nutrition Examination Survey (KNHANES). SUBJECTS/METHODS: Data for 3,373 persons aged 65 years and over (men: 1,455, 43.1%) were selected from the 2008–2011 KNHANES. Sarcopenia assessments are based on a formula that divides a subject"s appendicular skeletal muscle mass (ASM) by their weight (wt) and multiplies that result by 100 ([ASM/wt] × 100). Sarcopenia is present if the subject"s result was less than one standard deviation (SD) below the sex-specific mean for a young reference group. For evaluation of diet quality, data obtained via the 24-hour recall method were used to calculate the Diet Quality Index for Koreans (DQI-K). A general linear model was applied in order to analyze general information and nutritional intake according to sarcopenia status. For analysis of the relationship between diet quality and sarcopenia, a binominal logistic regression analysis was undertaken. RESULTS: The sarcopenia prevalence rate among the study subjects aged 65 years and over was 37.6%. The DQI-K of those without sarcopenia was 3.33 ± 0.04 points, while that of those with sarcopenia was 3.45 ± 0.04 points (P < 0.05). The relationship between diet quality and sarcopenia revealed that subjects aged 75 and older had a poor diet quality, and their odds ratio (OR) of sarcopenia presence was significantly higher (OR: 1.807, 95% confidence interval: 1.003–3.254, P < 0.05). CONCLUSIONS: This study revealed that poor diet quality was related to sarcopenia presence in Koreans aged 75 and older. In order to improve the diet quality of the elderly (aged 75 and older), it is necessary to develop dietary improvement guidelines.
Applicability of Soil Suitability Class Assessed with the Quantification Theory I
Woori Go,Byunghwan Seo,Songrae Cho,Yeonkyu Sonn 한국토양비료학회 2022 한국토양비료학회지 Vol.55 No.2
This study was conducted to suggest a method to assess soil suitability for crops objectively with categorical soil data and multivariate analysis methods. The Quantification Theory I was selected for the multivariate analysis method and the comprehensive point method was used as the conventional analysis tool for soil suitability assessment. The sites to survey soil characteristics and fig production were determined to include all classes of soil samples for all soil factors. Soil factors were soil texture of the subsoil, drainage class, available soil depth, gravel contents, and soil slope. In order to apply it nationwide based on the materials of the survey area, we used the 1,361 soil symbols data in Korea. After calculating the quantity forecast value for each soil factors, it was divided into four equal parts in descending order of very suitable, suitable, possible, and not suitable area. In the comprehensive point method, points were applied for each soil factor, and then classified according to the sum of the scores. The result of comparing the soil suitability class of the two setting methods the 1,361 soil symbols, 876 (64.4%) had the same grade, and 485 (35.6%) were classified as one grade lower or higher. Quantification Theory I is considered to have the potential to be utilized because it has the advantage of being able to classify at once through statistical analysis without subjective intervention if there is crop quantity data.