• Environmental Engineering Research
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• 제23권1호
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• pp.54-61
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• 2018

Biodiesel production parameters and the impact analysis of the potential emissions from both soybean biodiesel and washing water stored in three different environmental conditions were investigated. The effects of the reaction temperature, methanol/oil mole ratio and catalyst concentration on biodiesel yield were considered. And the results showed optimum biodiesel yield of 99% obtained at $54^{\circ}C$, 7 methanol/oil mole ratio and 0.4 wt/wt % catalyst concentration. The potential emissions from both the biodiesel produced and washing water stored (for six weeks) in refrigerator (${\leq}10^{\circ}C$), vacuum (50 kPa) and direct exposure to atmosphere were identified and quantified. Impact analysis of the emissions involved their categorization into: terrestrial acidification, freshwater eutrophication, human toxicity, terrestrial ecotoxicity, climate change and freshwater ecotoxicity. Freshwater ecotoxicity category had the most pronounced negative impact of the potential emissions with $5.237710^{-2}kg\;1,4-DB\;eq$. emissions in Atmosphere, $4.702610^{-2}kg\;1,4-DB\;eq$. emissions in Refrigerator and $3.966110^{-2}kg\;1,4-DB\;eq$. emissions in Vacuum. Climate change had the least effect of the emissions with $6.214106^{-6}kg\;CO_2\;eq$. in Atmosphere, $3.9310^{-6}kg\;CO_2\;eq$. in Refrigerator and $1.6710^{-6}kg\;CO_2\;eq$. in Vacuum. The study showed that the order of preference of the storage environments of biodiesel is vacuum environment, refrigerated condition and exposure to atmosphere.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.34-40
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• 2006

The daytime(7 a.m to 10 p.m.) and the nighttime(10 p.m. to 7 a.m.) used to calculate existing $L_{dn}$ is different from the domestic daytime(6 a.m to 10 p.m.) and nighttime(10 p.m. to 6 a.m.) periods. The difference of a time periods makes too difficult for converting measured $L_{eq}$ during daytime($L_d$) and nighttime($L_n$) periods to $L_{dn}$. Thus, it is difficult to directly compare with $L_{dn}$ standard of a foreign country. The pupose of paper is to propose a proper experimental equations that make up for the problems. The data of this paper used road traffic noise data of Auto-Network System(ANS) that generates $L_{eq}$ TNI, $L_{NP}$ for 1 hour. A method of this paper is as follows.(1) The data of ANS converted 24 hour $L_{eq}$ which measured every 1 hour to existing $L_{dn}$ and to $L_{dn}$ of an experimental equations.(2) The existing Lan is compared to results of $L_{dn}$ from experimental equations. The paper proposes a three experimental equations. This paper select an approximate equation that was most similar, to existing $L_{dn}$ out of these equations. When $L_{eq}$ data of different daytime and nighttime periods are converted to $L_{dn}$, an experimental equation of this paper can be used and applied to $L_{dn}$'s calculation.

• 한국어병학회지
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• 제6권2호
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• pp.163-175
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• 1993

1. 과산화물가가 90.4mEq/kg인 산화사료를 180일간 투여하여 Ceroid증이 발생한 어류를 1991년 10월 1일부터 11월 4일까지 Ceroid증의 치료실험을 행하였다. 2. 치료하기 위하여 정상사료(POV : 15.5mEq/kg)에 glutathione을 첨가하지 않은 실험군, 10, 20, 30, 40mg/kg/day을 첨가한 실험군 그리고 산화사료(POV : 90.4mEq/kg)만 투여한 대조군에서의 성장을 비교한 결과 대조군 및 무첨가한 실험군에서는 거의 성장이 이루어지지 않았으며, glutathione을 첨가한 모든 실험군에 있어서는 실험군별 차이없이 비슷하게 나타났다. 3. 병리조직학적으로는 glutathione 10, 30mg/kg 첨가한 실험군에서는 투여 7일째부터 ceroid 침착량 및 손상된 조직의 회복상태를 나타나기 시작하여 투여 21일 이후부터는 거의 정상적인 조직상을 나타내었다. glutathione 10mg/kg과 30mg/kg 첨가한 실험군별 조직회복상태는 10mg/kg/day 첨가한 실험군 보다 30mg/kg/day 첨가한 실험군에서가 치료효과가 양호한 것으로 나타났다.

• Journal of Nutrition and Health
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• 제26권1호
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• pp.89-97
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• 1993

This study was carried out to estimate the relationship between dietary intake, blood level, and urinary excretion of minerals and blood pressure in 30 healthy adults living in rural area of Korea(12 males and 18 females). Analysis for the nutritional status of the subjects were performed by 3-day dietary intake record, duplicated diet collection, 24-hour urine collection, and venous blood sampling before measuring blood pressure. The mean blood pressure of subjects was 117.50/80.83mmHg in males and 110.00/73.89mmHg in females. The mean daily intakes of Na, K, Ca, P, Mg, Fe, Cu, Zn estimated for 3 days were 199.97mEq, 49.56mEq, 452.50mg, 725.57mg, 240.40mg, 12.48mg, 3.41mg, 8.28mg, respectively. The serum concentration of Na, K, Ca, P, Mg, Fe, Cu, Zn were 139.83mEq/dl, 4.06mEq/dl, 8.86mg/dl, 3.28mg/dl, 2.13mg/dl, 0.12mg/dl, 0.12mg/dl, 0.14mg/dl, respectively. The 24-hour urinary excretions of Na, K, Ca, p, Mg, Fe, Cu, Zn estimated for 169.60mEq, 39.37mEq, 80.40mg, 398.97mg, 64.77mg, 0.21mg, 0.07mg, 0.29mg, respectively. No significant correlation was found between dietary intake, serum concentration, and urinary excretion of minerals and blood pressure. But, the serum Ca/Mg ratio showed negative correlation with the systolic and diastolic blood pressure at the level of significance of 5%. The study verifies the need for more systematic studies on interrelationship among minerals and mineral requirements in normotensive and hypertensive subjects.

• 자원리싸이클링
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• 제27권1호
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• pp.64-73
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• 2018

본 연구는 탈황 폐촉매 금속회수 재활용 기술에 대한 전과정평가 수행을 통해 해당 기술의 환경성 및 환경영향에 기여하는 주요 이슈를 규명하여 친환경적인 재활용 기술이 되도록 하는 개선안을 제시하고, 탈황 폐촉매 재활용 기술의 미적용 시 소각 처리되는 경우와의 비교를 통해 탈황 폐촉매 재활용 기술의 환경적 가치를 규명하고자 한다. 본 연구에서는 환경부의 환경성적표지인증제도의 영향평가 방법인 환경부 영향평가 방법론을 활용하여 지구온난화, 자원소모, 산성화, 부영양화, 광화학적산화물생성, 오존층파괴를 대상으로 환경영향을 도출하였다. 분석 결과, 탈황촉매 1 ton 처리 시 환경영향은 각각 지구온난화 3.53E+00 ton $CO_2-eq.$, 자원소모 1.73E-02 ton Sb-eq., 산성화 5.13E-03 ton $SO_2-eq.$, 부영양화 9.16E-04 ton $PO{_4}^{3-}eq.$, 광화학적산화물생성 1.94E-03 ton $C_2H_4-eq.$, 오존층파괴 1.11E-07 ton CFC-eq.로 나타났다. 전체 공정 중 용융환원 공정이 환경영향을 발생시키는 주요 공정이며, 투입 산출물 중 용융환원공정에서 사용되는 전기가 전체 환경영향에 기여하는 영향이 가장 큰 것으로 나타났다.

• 한국콘텐츠학회논문지
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• 제15권1호
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• pp.276-285
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• 2015

이 연구의 목적은 우리나라의 지역사회 건강관련 삶의 질에 영향을 미치는 지역사회 요인을 확인하기 위함이다. 2012년 단면연구이며, 국가통계포털의 209개의 시군구별 2차 자료를 사용하였다. 기본 틀은 International Council of Science(ICSU)에서 제시한 지역사회 건강결정요인을 바탕으로 구성하였고, 6가지 측면으로 분류하였다. 분석방법은 지역사회 EQ-5D지수와 지역사회 요인들에 다변량 회귀분석을 실시하였다. 분석결과로, 흡연율, "양호한" 주관적 건강수준 인식률, 상수 및 하수도 보급률 그리고 재정자립도가 EQ-5D에 통계적으로 유의하게 긍정적인 연관성이 있었다. 순인구이동률, 비만율, 필요서비스 미치료율 그리고 지역사회 유형이 EQ-5D에 통계적으로 유의하게 부정적인 연관성이 있었다. 이 연구는 지역사회 수준의 건강관련 삶의 질에 영향을 미치는 지역사회 요인들의 연관성을 확인했으며, 이것은 지역사회 건강 정책 개발에 유용한 증거를 제공할 수 있다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권13호
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• pp.5287-5291
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• 2014

Background: The cancer survival rate in Korea has substantially increased, necessitating the management of not only patients with cancer but also longer term survivors. Although the divorce rate has drastically increased in Korea, there is not sufficient research regarding the relationship between changes in marital status and quality of life (QOL) in cancer patients and survivors. Thus, we aimed to examine the relationship between marital status and QOL in such cases. Materials and Methods: This study was performed using the Community Health Survey of 2008 administered by the Korea Centers for Disease Control and Prevention (N=169,328). We used t-tests and Chi-square tests to compare demographic variables between men and women, and analysis of variance (ANOVA) to compare QOL scores among comparison groups. We also performed a multilevel analysis on the relationship between QOL and marital status while accounting for provincial differences. Results: Decline of EuroQOL five dimensions (EQ-5D) in single patients with cancer was greater than in any other marital status group, but there was no statistically significant decline in survivors of cancer with regard to marital status. In the general population, the decline of EQ-5D was higher among single people than married people. Using the EuroQOL visual analog scale (EQ-VAS), single people had higher values than those of other marital status among both patients with cancer and survivors of cancer. In the general population, EQ-VAS values were higher for single people compared to married people. Conclusions: There may be a significant relationship between marital status and QOL in cancer patients and survivors. Policy interventions to manage patients with cancer who experience a decline in QOL as well as marital problems should be conducted.

• 한국식품영양과학회지
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• 제25권1호
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• pp.1-10
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• 1996

뇌졸중이라고 진단된 입원 환자 26명을 대상으로 3일동안 섭취한 식이와 24시간 뇨와 혈액을 수집하고 혈압을 측정하여 나트륨, 칼륨, 캄슘, 마그네슘의섭취 수준에 다른 뇨중 배설량과 혈중 수준을 관찰하고 이들과 혈압과의 관계를 알아봄으로써 뇌졸중 환자를 포함한 고혈압 관리의 치료식이를 제공하는데 기초자료로 사용하고자 실시간 연구결과를 요약하면 다음과 같다. 1. 대상자들의 평균 연령은 남녀 각각 52.6세, 58.5세였으며 평균 BMU는 남녀 각각 21.6, 22.4였다. 입원 당시 평균 혈압은 남녀 각각 147.3/90.9mmHg, 162.7/102.0mmHg였고, 실험 종료일의 평균 혈압은 남자의 경운 124.6/80.8mmHg 였고 여자 대상자는 137.7/91.3mmHg 였다. 2. 1일 평균 나트륨, 칼륨, 칼슘, 마그네슘의 섭취 향은 96.7$\pm$30.7mEq,64.8$\pm$19.0mEq, 431.3$\pm$227.1mg, 333.9$\pm$145.9mg이었다. 3. 1일 평균 뇨중 나트륨, 칼륨, 칼슘, 마그네슘의 배설량은 76.7$\pm$28.2mEq, 33.9$\pm$16.6mEq, 65.6$\pm$34.0mg, 96.5$\pm$58.0mg이었다. 4. 평균 혈청내 나트륨, 칼륨, 칼슘, 마그네슘의 함량은 137.8$\pm$4.3mEq/l, 3.7$\pm$0.5mEq/l, 7.6$\pm$0.8mg/dl, 2.2$\pm$0.2mg/dl로써 칼슘 농도가 정상수준에 비해 비교적 낮은 것으로 나타났다. 5. 혈압과 무기질과의 관계에서 수축시 혈압의 증가시 뇨중 칼륨 배설이 증가함으로써 수축기 혈압과 뇨중 칼륨 배설량 사이에 유의적인 부의 상관관계가 나타났다. (p<0.05). 이상과 같은 입원중인 뇌졸중 환자의 뇨중 나트륨과 칼륨의 배설률 및 혈청과 뇨중 칼슘 배설수준이 정상인 보다 낮은 수준이었으며, 칼륨은 뇌졸중 환자의 혈압관리에 효과적이 무기질로 작용할 가능성이 보여지므로 고혈압관리를 위한 식사 처방시 이들 무기질에 대한 고려가 있어야 할 것으로 사료된다.

• Journal of Preventive Medicine and Public Health
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• 제41권6호
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• pp.434-441
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• 2008

Objectives: This study was conducted to measure the decline in the health-related quality of life (HRQoL) associated with some diseases in South Korean adults. Methods: The EQ-5D health states in the 2005 National Health and Nutrition Examination Survey (NHNES) and the Korean EQ-5D valuation set were used to obtain the EQ-5D indexes of the study subjects. Each disease group was defined when the subjects reported to the NHNES that they were diagnosed with the corresponding disease during the previous 1 year by physicians. Since the distributions of the EQ-5D indexes in each subgroup were negatively skewed, median regression analysis was used to estimate the effects of specific diseases on the HRQoL. Median regression analysis produced estimates that approximated the median of the EQ-5D indexes and there are more robust for analyzing data with many outliers. Results: A total of 16,692 subjects (6,667 patients and 10,025 people without any disease) were included in the analysis. As a result of the median regression analysis, stroke had the strongest impact on the HRQoL for both males and females, followed by osteoporosis, osteoarthritis, rheumatic arthritis, and herniation of an intervertebral disc. While asthma had a significant impact on the HRQoL only in men, cataract, temporo-mandibular dysfunction, and peptic ulcer significantly affected the HRQoL only in women. Conclusions: Stroke and musculoskeletal diseases were associated with the largest losses of the HRQoL in Korean adults.

• 한국기후변화학회지
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• 제9권1호
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• pp.75-80
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• 2018

The problem of water shortages and water related disasters caused by climate change has increased the seriousness of water problems and the importance of water treatment technology capable of securing clean water is expanding. In this study, we analyzed not only the water pollutant generated by the filtration system technology of various water treatment technologies but also the indirect greenhouse gas emissions generation, and analyzed the influence on the environment. The subjects of study are Fabric Filter, Reverse Osmosis System and Pressurized Microfiltration Device which are widely used for water treatment and we analyzed the impact on the environment using the Life Cycle Assessment (LCA) method using the electricity amount necessary for use, the water purification efficiency, the throughput per ton and the cost. The amount of greenhouse gas generated when the Pressurized Microfiltration Device operates for 1 year is $2.15E+04kg\;CO_2-eq$., Fabric Filter is $3.29E+04kg\;CO_2-eq$., and Reverse Osmosis System is $1.68E+05kg\;CO_2-eq$. As a result of analyzing the amount of greenhouse gas generated at the time of purifying 1 ton of the Pressurized Microfiltration Device and the conventional filtration system, the Pressurized Microfiltration Device was $20.5g\;CO_2-eq$., Fabric Filter was $34.7g\;CO_2-eq$., and Reverse Osmosis System was $191.7g\;CO_2-eq$. The amount of greenhouse gas generated was calculated to be 41.0% less than that of the Fabric Filter by the Pressurized Microfiltration Device and 89.3% less than the Reverse Osmosis System. From the viewpoint of climate change, it is necessary to select a filtration system that takes climate change into account, not from the viewpoint of water quality removal efficiency and economic efficiency according to future water treatment applications, and it is necessary to select a water treatment filtration system more researches and improvements will be made for.