• Title/Summary/Keyword: 요구양정

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Characteristics of Processed Food for Improvement Utilization of Sweet Persimmon (단감의 이용성 증진을 위한 특성 검토)

  • Choi, Yoon-Hee;Kim, Eun-Mi;Cho, Yong-Sik;Park, Shin-Young;Yang, Jeong-Min
    • Proceedings of the Korean Society of Community Living Science Conference
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    • 2009.09a
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    • pp.88-88
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    • 2009
  • 단감은 우리나라가 세계에서 가장 많은 양을 생산하는 대표 과일로 과잉생산과 수확기에 일시적인 홍수출하로 인한 가격이 하락하고, 기상이변에 의한 비상품 과일의 생산이 많아지나 전량 폐기되고 있으며, 유통 및 저장 중에 연화현상과 생리적장애로 품질이 저하되어 경제적 손실이 발생되므로 안정적 생산과 소비를 위하여 다양한 형태의 식품개발이 절실히 요구된다. 국내 감 생산량은 352,822톤이며 이 중 떫은감은 146,233톤(41.45%), 단감은 206,589톤(58.55%)으로 단감 생산량이 떫은감에 비하여 많으며 국내 단감 생산지는 진영, 순천, 문산, 담양, 장성 등 집단화 되어 있고, 원료확보가 유리하나 저장은 수확기인 10월 중순, PE필름 봉지에 넣고 밀봉하여 박스 등에 넣어 $0{\sim}1^{\circ}C$의 저온저장고에 이듬해 4월 중순까지 6개월 정도 저장 가능하나 저장비용이 많이 들고, 4월 이후에는 생리적 장해로 보관이 어렵다. 단감은 다른 과일에 비하여 높은 감미와 비타민 A, 비타민 B1, 비타민 C, 식이섬유 및 리코핀 성분이 다량 함유되어 있고, 노화와 암 발생을 억제하는 폴리페놀물질이 풍부하여 건강 기능성 과일로 알려져 있다. 본 연구에서는 시중에서 구입한 단감의 저온저장 중 감모율 및 이용성 구명을 위하여 관련특성을 검토하였다. 단감을 3월에 구입하여 $5^{\circ}C$에 저온저장하여 보관기간별 감모율을 조사하였고, 단감의 전 처리 후 당도, pH, 색도, 수분함량 등을 조사하였다. 3월에 시중에서 구입하여 PE필름에 봉한 채 종이박스 넣어 $5^{\circ}C{\pm}2$ 저온저장고에 저장하여 1개월 후에 조사한 결과 정상과가 75.47%, 25%미만 장해과가 14.37%, 50%이상 장해과가 10.16% 이었고, 2개월 후는 정상과가 41.52%, 25%미만 장해과가 42.88%, 50%이상 장해과가 15.61%이었다. 단감을 꼭지제거, 박피, 제핵 후 절단하여 파쇄 후의 당도는 14.8 $^{\circ}Brix$, pH는 6.0, 수분은 56.7%, 색도 L값은 39.8, a값이 12.6, b값이 22.7이었다. 파쇄한 단감을 $-20^{\circ}C$에 1차 냉동하여 해동 후 당도는 냉동 전 $14.8^{\circ}Brix$에서 $14.2^{\circ}Brix$로, 2차 냉동 해동 후는 $12.6^{\circ}Brix$로 감소하였으며, 색도 L값과 a값 및 b값은 냉동 전에 비하여 감소하였고, 수분함량은 냉동 전 64.4%, 1차 냉동 해동 후에 82.78%, 2차 냉동 해동 후에는 84.09%로 증가하였다.

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Trace level analysis of Pb in plasma by inductively coupled plasma/mass spectrometry (유도결합플라즈마 질량분석법을 이용한 혈장 중 극미량 납 분석)

  • Lee, Sung-Bae;Yang, Jeong-Sun;Choi, Sung-Bong;Shin, Ho-Sang
    • Analytical Science and Technology
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    • v.25 no.3
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    • pp.190-196
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    • 2012
  • The human exposure of lead has usually detected the amount of lead in the whole blood, however, this method has a shortcoming to give the information on the short-term exposure to lead. In that sense, it is desirable to estimates the level of lead in plasma to draw the chronic bio-marker of lead exposure even though it is difficult to measure lead of several ng/L. An inductively coupled plasma-mass spectrometry (ICP-MS) method was developed for determining lead in plasma as the chronic bio-marker of lead of workers. To minimize the contamination of lead from the environment, we constructed class 1,000 clean room and compared the amount of floating dust before and after the operation of the clean room. The limit of detection (LOD) and the limit of quantification (LOQ) of lead in fetal bovine serum were 4.3 ng/L and 12.2 ng/L by NIOSH method (statistical calculation method) and 7.0 ng/L and 22.1 ng/L by signal/noise ratio, respectively. The accuracy was in a range of 92.3-101.3%, and the precision of the assay was less than 4% in the samples spiked in the concentration of 20 ng/L and 2,000 ng/L. The method was simple, reproducible and sensitive enough to permit reliable analysis of lead to the ng/L level in plasma and/or serum. The method was also useful for the biological monitoring of chronic exposure to lead.

Performance Test of a 7 tonf Liquid Rocket Engine Turbopump (7톤급 액체로켓엔진용 터보펌프 조립체 성능시험)

  • Kwak, Hyun Duck;Kim, Dae-Jin;Kim, Jin-Sun;Kim, Jinhan;Noh, Jun-Gu;Park, Pyun-Goo;Bae, Jun-Hwan;Shin, Ju-Hyun;Yoon, Suck-Hwan;Lee, Hanggi;Jeon, Seong-Min;Jeong, Eunhwan;Choi, Chang-Ho;Hong, Soon-Sam;Kim, Seong-Lyong;Kim, Seung-Han;Han, Yeong-Min
    • Journal of the Korean Society of Propulsion Engineers
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    • v.19 no.2
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    • pp.65-72
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    • 2015
  • Performance tests of a turbopump for the developing 7-tonf liquid rocket engine were conducted. The performance of turbopump components and their power matching were measured and examined firstly under the LN2 and water environment. In the real propellant(LOX and kerosene) environment tests, design and off-design performances of turbopump were fully verified. During the off-design tests, turbopump running time was set the same as engine operating time and pump inlet pressure were set lower than nominal operating value in order to investigate pump suction capability. It have been verified that subject turbopump satisfies required performance - flow rate, head, suction performance and operational time - in the operating regime of developing liquid rocket engine.

Study on Analysis and Improvement of Head of Ri Election Rules & Regulations -Focusing on Eup/Myeon Regional Village Codes of Jeju Special Self-Governing Province- (이장(里長)선출 규정 분석 및 개선에 관한 연구 -제주특별자치도 읍·면지역 향약을 중심으로-)

  • Kim, Il-Soon;Yang, Jeong-Cheol;Hwang, Kyung-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.2
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    • pp.610-616
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    • 2021
  • This study is a literature review that analyzes the head of Ri election rules and regulations described in the village code, identifies problems, and proposes solutions for these problems. For data collection, a total of 146 village codes was collected from January 2019 to August 2019. The results showed people in most villages vote for the head of Ri according to democratic electoral processes. For system improvement, a one-person, one-vote system was proposed instead of a one-family, one-vote system in order to enhance gender equality and political rights. As for the appointment system, the following changes were proposed: First, candidate eligibility should be improved as only people who were born in that village are eligible; Second, the maximum age of candidacy for the head of Ri should be established as under 65 years old by considering physical ability in the event of disaster occurrences and physical activity required for running village businesses; Third, consecutive terms of the head of Ri when there is no successor should be limited in order to prevent indigenous forces from settling in the local community; and Fourth, education should be provided for building the head of Ri's stature in order to devote to promote public interest for village development.

Performance Test of a 75-tonf Rocket Engine Turbopump (75톤급 액체로켓엔진용 터보펌프 실매질 성능시험)

  • Jeong, Eunhwan;Kwak, Hyun-Duck;Kim, Dae-Jin;Kim, Jin-Sun;Noh, Jun-Gu;Park, Min-Ju;Park, Pyun-Goo;Bae, Jun-Hwan;Shin, Ju-Hyun;Wang, Seong-Won;Yoon, Suck-Hwan;Lee, Hanggi;Jeon, Seong-Min;Choi, Chang-Ho;Hong, Soon-Sam;Kim, Seong-Lyong;Kim, Seung-Han;Woo, Seong-Phil;Han, Yeong-Min;Kim, Jinhan
    • Journal of the Korean Society of Propulsion Engineers
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    • v.20 no.2
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    • pp.86-93
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    • 2016
  • Performance tests of a 75-tonf liquid rocket engine turbopump were conducted. The performance of sub-components - two pumps and a turbine - and their power matching were measured and examined firstly near the design speed under the LN2 and kerosene environment. In the real propellant - LOX and kerosene - environment tests, design and off-design performance of turbopump were fully verified in regime of the rocket engine operation. During the off-design performance tests, turbopump running time was set longer than the engine operating time to verify the pump operability and set the pump inlet pressure close to design NPSHr to investigate pump suction capability in parallel. It has been found that developed-turbopump satisfied all of the engine required performances.

Perception of University Students on Nutrition Information According to Food & Nutrition Labeling Systems in Family Restaurant (패밀리 레스토랑의 영양표시제도 시행에 따른 대학생들의 영양정보에 관한 인식 연구)

  • Yang, Jung-Hwa;Heo, Young-Ran
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.42 no.12
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    • pp.2068-2075
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    • 2013
  • The purpose of this study is to investigate the perception of university students on nutritional information according to food and nutrition labeling systems. A total of 310 customers, who visited family restaurant, were surveyed by a self-recorded questionnaire from March 2006 to April 2011. A total of 286 respondents were surveyed; of the respondents, 108 were males and 178 were females. Two surveys were conducted on the perception of the respondent's health: once in 2006 and once in 2011. According to these surveys, 63.6% and 54% of respondents perceived themselves as unhealthy, respectively. When ordering a meal, respondents were more concerned with price rather than taste, nutrition, new menu items, and food presentation. Compared with 2006, in 2011 more respondents felt that family restaurants provided enough nutritional information and practical use of that information to their customers. When surveyed, respondents felt that the total calories played a significantly higher role in ordering food than foods with higher nutritional values. There was a significant increase in satisfaction with the current nutrition labeling system; in 2006, $2.87{\pm}0.99$, and 2011, $3.35{\pm}0.84$. There was also a significant increase in individuals who felt that there was a need for an ingredient labeling system; $3.68{\pm}0.9$ in 2006 and $4.32{\pm}0.61$ in 2011. There was also a higher demand for nutritional information; $2.85{\pm}0.66$ in 2006, $3.06{\pm}0.65$ in 2011. From these results, it was concluded that the nutrition labeling system adopted by family restaurants did not affect the degree of customers' interest in nutritional information. Contrast to the results, the amount and frequency of nutritional information provided to customers have increased continuously since 2006. Therefore, the nutrition labeling system and recommended dietary allowance should be expanded in order to promote a healthy diet.

Perceptions of Science Teachers on Socioscientific Issues as an Instructional Tool for Creativity and Character Education (과학과 관련된 사회.윤리적 문제(SSI)의 도입을 통한 창의.인성 교육 가능성에 대한 과학교사들의 인식)

  • Yang, Jung-Eun;Kim, Hyun-Jeong;Gao, Lei;Kim, Eun-Jin;Kim, Sung-Won;Lee, Hyun-Ju
    • Journal of The Korean Association For Science Education
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    • v.32 no.1
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    • pp.113-128
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    • 2012
  • This study explored to what extent Korean science teachers perceived socioscientific issues (SSI) as an effective instructional tool for creativity and character (CreActer) education; which was recently announced as a main goal for the Korean National Science Curriculum 2009. The guiding research questions were as follows. (1)How do science teachers conceptualize the relationship between creativity and character in the context of science classes? (2) What do science teachers think about the possibility of CreActer education through SSI in science classrooms? Thirty science teachers participated in individual interviews (each lasted 20-90 minutes). In the results, the teachers' perceptions on CreActer education and SSI for CreActer education were categorized into four profiles. Eleven teachers in Profile A thought that creativity was positively correlated with character education because their understanding of creativity and character embraced a very broad range of elements. They mentioned that addressing SSI in the science classes would be satisfactory to cover those elements of CreActer education. Six teachers in Profile B mentioned similar elements of creativity and character of Profile A, but reported that, in their experience, creativity was often inversely correlated with character. However, they responded that addressing SSI would be a good way to integrate creativity and character in the science classes. Ten teachers in Profile C believed there was no relationship between creativity and character, but took a positive stance on CreActer education through SSI. Unlike Profile A and Profile B, they tended to regard character as only an interpersonal virtue. And three teachers in Profile D had a narrow perspective on CreActer education. Not only did they think creativity had no relationship with character, but also disagreed that CreActer education would be activated by addressing SSI in science classrooms. The results imply that SSI could be used as an effective instructional tool for CreActer education, but this can be possible when science teachers expand their view on CreActer education.