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채미진,정하일,김명숙,이태구,이은진,백선혜,이승규 한국토양비료학회 2023 한국토양비료학회지 Vol.56 No.2
Many soil amendments are used to remediate paddy soils polluted with heavy metals, including arsenic (As)and lead (Pb). This study was conducted to assess the efficacy of three inorganic soil amendments, such ascalcium carbonate (CaCO3), calcium sulfate (CaSO4), and ferrous sulfate (FeSO4), on As and Pb co-contaminatedpaddy soils. The amendments were applied alone and/or in combinations to compare theirs efficacy forthe As and Pb stabilization and the rice growth. In addition, two single extraction methods, 1 M ammoniumnitrate (NH4NO3) and Mehlich-3, were used to assess the effects on As and Pb immobilization using amendments. The alone (CaSO4 and FeSO4) and combined (CaCO3 + CaSO4, FeSO4 + CaCO3, FeSO4 + CaSO4)amendment treatments significantly decreased the extractable As concentrations in NH4NO3 and Mehlich-3extraction of the treated soil. Furthermore, FeSO4 alone treatment indicated the maximum reduction of theextractable As concentration in Mehlich-3 extraction of the treated soil. The extractable Pb concentrations byFeSO4 alone treatment were significantly increased in both extractions of the treated soil, but no significantdifferences were observed in CaSO4 alone and combined amendment treatments, relative to the concentrationsin the untreated soils (As and Pb co-contaminated paddy soils). Shoot dry weight (DW) of rice plants slightlydecreased with the application of alone and combined amendments compared with that of the untreated soils. However, As concentrations in the leaf sheath of rice plants were reduced 21 - 41% by the alone and combinedamendment treatments, but no significant difference was observed in the leaf blade relative to the untreatedcontrol. On the other hand, Pb concentration in the rice plants with FeSO4 + CaSO4 (1:1) treatment significantlyincreased in the leaf sheath and leaf blade, but no significant differences were observed in all organswith other amendments compared with the untreated control. Therefore, FeSO4 can be applied to a feasibleapproach for alleviating As stress in rice plants and reducing the affect of the As accumulation of As and Pbco-contaminated paddy soils.
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채미진,정구복,강성수,강명석,김유학,이동배 한국토양비료학회 2014 한국토양비료학회지 Vol.47 No.6
Phytoremediation is a technology using plants and associated soil microbes to reduce the concentrations ortoxic effects of contaminants in the environments. It is regarded as a cost-effective, efficient, eco-friendly, andsolar-driven technology with good public acceptance. This study was conducted to find the plantsaccumulating heavy metals in soils contaminated with Cd and Pb. Experimental plots (plot size: 0.81 m2) wasartificially contaminated using a contaminated soil collected from a field in vicinity of Wondong mine (WD). Sunflower, corn and castor were tested for their potential to remove heavy metals from the contaminated soils. The results indicated that sunflower was most effective in accumulating heavy metals and thus remedying thesoils among the three crops. Dry weight and heavy metal uptake of sunflower shoot differed with growthperiod. For example, the Cd content of shoots including leaf and stem were 0.31mg, 2.23 mg, and 0.96 mg perplot at 4, 8 and 12 weeks after planting in Cd4-WD treatment; in addition, the dry weight of the shoots inCd8-WD treatment was reduced due to heavy metal toxicity. This experiment showed that sunflower absorbedCd, Pb and Zn in their shoots up to 8 weeks of planting; thereafter heavy metals uptake was diminished. Thisimplies that the efficiency of these plants in cleaning the contaminated soils may be high at the early stage ofplant growth.
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채미진,배현주,윤지영 한국외식경영학회 2008 외식경영연구 Vol.11 No.2
The principal objective of this study was to assess the consumption practices and selection attributes of university students with regard to ready-to-eat foods (RTE). A survey was administered, using questionnaires, to 200 university students. A total of 188 of the questionnaires proved usable, resulting in a response rate of 94.0%. Statistical analyses were conducted using the SPSS package program(version 12.0 for Windows). The results of the statistical analyses were as follows. The most frequently reported motivation for the purchase of RTE was convenience, at 84.1%. The ratio at which RTE were substituted for a meal was 69.1%. The validity of the 24 features was evaluated via factor analysis. Six total factors were identified as follows: 'Factor 1. Food quality', 'Factor 2. Package and Brand', 'Factor 3. Accessibility and convenience', 'Factor 4. Preference', 'Factor 5. Purchasing experience of the past', and 'Factor 6. Propriety of price and consistent food quality'. Women considered 'Preference' and 'Propriety of price and consistent food quality' more important than did men (p<0.05). Students who frequently used convenience stores to buy RTE considered 'Food quality' and 'Propriety of price and consistent food quality' less important than did others who used big discount stores or specialized stores. As a consequence, the selection attributes of RTE were influenced by the demographic characteristics and purchasing environment of consumers. For this reason, RTE marketers should focus their marketing efforts and formulate strategies toward the satisfaction of customers' needs. The principal objective of this study was to assess the consumption practices and selection attributes of university students with regard to ready-to-eat foods (RTE). A survey was administered, using questionnaires, to 200 university students. A total of 188 of the questionnaires proved usable, resulting in a response rate of 94.0%. Statistical analyses were conducted using the SPSS package program(version 12.0 for Windows). The results of the statistical analyses were as follows. The most frequently reported motivation for the purchase of RTE was convenience, at 84.1%. The ratio at which RTE were substituted for a meal was 69.1%. The validity of the 24 features was evaluated via factor analysis. Six total factors were identified as follows: 'Factor 1. Food quality', 'Factor 2. Package and Brand', 'Factor 3. Accessibility and convenience', 'Factor 4. Preference', 'Factor 5. Purchasing experience of the past', and 'Factor 6. Propriety of price and consistent food quality'. Women considered 'Preference' and 'Propriety of price and consistent food quality' more important than did men (p<0.05). Students who frequently used convenience stores to buy RTE considered 'Food quality' and 'Propriety of price and consistent food quality' less important than did others who used big discount stores or specialized stores. As a consequence, the selection attributes of RTE were influenced by the demographic characteristics and purchasing environment of consumers. For this reason, RTE marketers should focus their marketing efforts and formulate strategies toward the satisfaction of customers' needs.
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채미진 ( Mi Jin Chae ),배현주 ( Hyun Joo Bae ) 한국식품조리과학회(구.한국조리과학회) 2008 한국식품조리과학회지 Vol.24 No.6
This study was executed in order to analyze the purchasing practices, preferences, and satisfaction of consumers purchasing ready-to-eat foods. The study was executed from the 20 May~30 June 2007 in the Daegu and Gyeong-sangbuk-do area. Questionnaires were distributed among 480 people. Of these, 410 questionnaires were collected and applied to a statistical analysis. Statistical analyses were conducted using the SPSS package program (version 14.0 for windows). The results of the statistical analyses were as follows. 42.4% males and 57.6% females participated in this study. The biggest motivation behind the purchase of ready-to-eat foods was convenience, 51.0%. The most common venues where these foods were purchased were supermarkets or discount marts, 67.6%. The ratio of substituting ready-to-eat foods for meals was 70.5%. The consumption practices of ready-to-eat foods of the consumers according to purchase place illustrated significant differences in the average expense per person each time (p<0.01), co-consumer (p<0.001), and age (p<0.05). The purchase preference was high with kimbaps (73.4%), hamburgers (29.8%), sushis (29.0%), and sandwiches (27.9%). Unmarried individuals showed a significantly higher overall liking and satisfaction for ready-to-eat foods than married individuals (p<0.001). Individuals living without a family was significantly higher overall liking and satisfaction than individuals living with a family (p<0.05). Individuals who spent an average of 10,000 won per time showed a significantly higher overall liking and satisfaction than those who spent below 10,000 won per time (p<0.05). In the presence of a friend as a co-consumer of ready-to-eat foods, satisfaction was significantly high (p<0.01). Consumers who purchased ready-to-eat foods at meal times, showed a significantly higher overall liking, compared to those who purchased such food products in between meal times (p<0.01). The preference and satisfaction degree of the consumer must be reflected by product development, quality improvement and marketing plan establishment.
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양미진(楊美珍),허자영(許慈暎),채민정(蔡旻廷),김경민(金庚珉) 서울대학교 교육연구소 2010 아시아교육연구 Vol.11 No.4
본 연구는 사이버 상담 게시판에 진로문제를 호소한 사례의 질적분석을 통하여 원하는 진로가 있지만 진로목표수행과정에서 진로장벽을 경험하고 있는 청소년의 내적 경험과 그 특징을 분석함으로써 청소년 진로지도에 도움이 되는 자료를 제공하고자 하는데 목적을 두었다. 이를 위하여 사이버 상담 게시판 사례 중 진로장벽을 경험하고 어려움을 호소하는 고등학생 24사례를 CQR로 분석하였다. 연구 결과는 다음과 같다. 첫째, 진로장벽은 고등학교 2학년 시기에 가장 많이 호소하며, 둘째 청소년들이 경험하는 진로장벽의 유형은 성적부진, 재능의 한계 등 자신의 능력 부족, 가정의 경제적 여건의 어려움, 부모님의 반대 등이 보고되었고, 셋째, 진로장벽을 경험하는 청소년의 경우 자신의 고민에 대해 이야기를 들어주거나 도움을 받을 수 있는 대상이 없는 것으로 나타났다. 넷째, 진로장벽을 경험하는 청소년의 경우 인지적 혼란과 문제를 과잉일반화하는 경향을 드물게 보고하였으며, 정서적으로 우울과 분노를 경험하는 것으로 나타났다. 또한 대안을 탐색하고 문제해결을 위해 노력하는 행동을 보이는 청소년들도 드물게 관찰되었다. 마지막으로 청소년들이 사이버 상담에 기대하는 것은 자신의 문제에 대한 구체적인 해결방법 탐색이었으며, 감정의 정화와 자신의 문제에 대한 이해도 사이버 상담을 찾는 이유로 나타났다. 이러한 연구 결과를 바탕으로 본 연구의 제한점과 차후 연구를 위한 제안점이 논의되었다. The purpose of this study is to look at adolescents" inner experience of career barriers using qualitative analysis and to provide the basis for career counseling. Specifically, this study focused on the experience of high school students who tentatively decided their careers but facing with career barriers on the path to achieve their career goals. 24 cases were selected from those mails that contain complaints about career barriers and were sent to the cyber(internet) counseling board at a youth counseling center. Selected cases were analyzed using consensual qualitative research(CQR), and the results are as follows; First, high school students complained of career barriers during sophomore year(2nd grade) more compared with during freshman and junior year. Second, types of career barriers participants reported are doubts about one"s ability related to one"s low academic performance and lack of competence(talents) in one"s major area, lack of financial support, and parents" opposition to one"s career choice. Third, participants reported a lack of social resource which would provide emotional and/or practical support in the time of facing career barriers. Fourth, as a response to career barriers, although in rare occasions, participants reported cognitive confusion, over-generalization, exploring alternatives, and making an effort to solve problems. Emotional reponses such as depression and anger were reported in more general terms. Lastly, as a reason to visit the cyber counseling board, participants appeared to have an expectation to find an effective way to cope with career barriers, to experience emotional catharsis and to have a better understanding of current problem. Limitations of this study and suggestions for future studies are discussed.
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