Evaluation for Impacts of Nitrogen Source to Groundwater Quality in Livestock Farming Area

Gyeong-Mi Lee,Sunhwa Park,Ki-In Kim,Sang-Ho Jeon,Dahee Song,Deok-hyun Kim,Tae-Seung Kim,Seong-Taek Yun,Hyen Mi Chung,Hyun-Koo Kim 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

We investigated 52 livestock farming complexes in Gyeong-Gi and Incheon provinces based on low, medium, and high livestock density and groundwater quality. The objective of this study was to evaluate a relationship between nitrate N concentration in groundwater and animal factors, such as livestock density and animal species. 2,200 groundwater samples for 3 years from 2012 to 2014 at Gyeong-Gi and Incheon provinces were collected and analyzed for pH, EC, DO, ORP, temperature, major anions and cations, such as NO₃-N, HCO₃<SUP>-</SUP>, PO₄<SUP>-</SUP>, SO₄<SUP>2-</SUP>, Cl<SUP>-</SUP>, NH₄-N, K<SUP>+</SUP>, Na<SUP>+</SUP>, Ca<SUP>2+</SUP>, Mg<SUP>2+</SUP>, T-N, and TOC. Average concentration of total N for generated load density was 23,973 g day<SUP>-1</SUP> km<SUP>-2</SUP> for cattle, 51,551 g day<SUP>-1</SUP> km<SUP>-2</SUP> for pig, and 52,100 g day<SUP>-1</SUP> km<SUP>-2</SUP> for poultry. For animal feeding species, average ratio for generated load over discharge load was 16.1% for cattle, 7.8% for pig, and 7.1% for poultry. Therefore, cattle feeding region is highly vulnerable for water pollution compared to pig and poultry feeding areas. The concentrations of chloride, nitrate, and total N in the groundwater samples were higher at high animal farming regions than other regions. The average concentration of nitrate, and chloride in groundwater samples was 5.0 mg L<SUP>-1</SUP>, 16.6 mg L<SUP>-1</SUP> for low livestock density, 6.9 mg L<SUP>-1</SUP>, 17.7 mg L<SUP>-1</SUP> for medium livestock density and 7.6 mg L<SUP>-1</SUP>, 22.7 mg L<SUP>-1</SUP> for high livestock density and total nitrogen (T-N) was 7.7 mg L<SUP>-1</SUP> for low livestock density, 9.4 mg L<SUP>-1</SUP> for medium livestock density, 10.7 mg L<SUP>-1</SUP> for high livestock density. In conclusion, based on this research, for managing groundwater quality near livestock farming regions, Ca-(Cl+NO₃) group from the Piper diagram is more efficient than using 19 factors for water quality standard.

Evaluation for Impacts of Nitrogen Source to Groundwater Quality in Livestock Farming Area

Lee, Gyeong-Mi,Park, Sunhwa,Kim, Ki-In,Jeon, Sang-Ho,Song, Dahee,Kim, Deok-hyun,Kim, Tae-Seung,Yun, Seong-Taek,Chung, Hyen Mi,Kim, Hyun-Koo 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

We investigated 52 livestock farming complexes in Gyeong-Gi and Incheon provinces based on low, medium, and high livestock density and groundwater quality. The objective of this study was to evaluate a relationship between nitrate N concentration in groundwater and animal factors, such as livestock density and animal species. 2,200 groundwater samples for 3 years from 2012 to 2014 at Gyeong-Gi and Incheon provinces were collected and analyzed for pH, EC, DO, ORP, temperature, major anions and cations, such as $NO_3-N$, ${HCO_3}^-$, ${PO_4}^-$, ${SO_4}^{2-}$, $Cl^-$, $NH_4-N$, $K^+$, $Na^+$, $Ca^{2+}$, $Mg^{2+}$, T-N, and TOC. Average concentration of total N for generated load density was $23,973g\;day^{-1}\;km^{-2}$ for cattle, $51,551g\;day^{-1}\;km^{-2}$ for pig, and $52,100g\;day^{-1}\;km^{-2}$ for poultry. For animal feeding species, average ratio for generated load over discharge load was 16.1% for cattle, 7.8% for pig, and 7.1% for poultry. Therefore, cattle feeding region is highly vulnerable for water pollution compared to pig and poultry feeding areas. The concentrations of chloride, nitrate, and total N in the groundwater samples were higher at high animal farming regions than other regions. The average concentration of nitrate, and chloride in groundwater samples was $5.0mg\;L^{-1}$, $16.6mg\;L^{-1}$ for low livestock density, $6.9mg\;L^{-1}$, $17.7mg\;L^{-1}$ for medium livestock density and $7.6mg\;L^{-1}$, $22.7mg\;L^{-1}$ for high livestock density and total nitrogen (T-N) was $7.7mg\;L^{-1}$ for low livestock density, $9.4mg\;L^{-1}$ for medium livestock density, $10.7mg\;L^{-1}$ for high livestock density. In conclusion, based on this research, for managing groundwater quality near livestock farming regions, $Ca-(Cl+NO_3)$ group from the Piper diagram is more efficient than using 19 factors for water quality standard.

Testimonies of the Jeju 4·3 survivors of imprisonment for completely resolving the Jeju 4·3 Incident and legally regaining the honor of the 4·3 victims during the imprisonment

By Dong-yun Yang,Mi-gyeong Kang,Yeong-ran Kim 세계환경사회거버넌스학회 2015 World Environment and Island Studies Vol.5 No.3

These people were wrongfully arrested, imprisoned and (in some cases tortured) by armed police, military and security forces as a part of the 4.3 Incident, without legitimate justification and without proper hearings or trial. It is essential theme that they spend their time in jail without doing any crime during the Jeju 4.3 Grand Tragedy. It is our second theme that they have suffered pains, trauma and lamentations from the Tragedy, then and now. These 11 cases represent desperate situation of violations of human rights of Jeju people during the Jeju 4.3 Grand Tragedy as it were : Gyeong-in Kim, Pyeong-guk Kim, Dong-su Park, Won-hyu Boo, Chun-ok Park, Keun-bang Yang, Il-hwa Yang, Hui-chun Oh, Chang-yong Hyun, U-ryong Hyun, and Byeongtae Jo

Enterococcus sp. JA-27에 의한 가용성 전분으로부터 L형 젖산의 생산

김경아,김미경,장경린,전홍기 부산대학교 김치연구소 2003 김치의 과학과 기술 Vol.9 No.-

폴리 젖산의 원료가 되는 젖산은 D-, L-의 광학이성질체로 존재하는데 L-젖산 폴리머와 라세미 폴리머는 결정성과 녹는점이 다르므로 플라스틱으로서의 만족할 만한 물성을 기대하기 위하여 원료로서 광학적으로 순수한 L-latic acid가 요구된다. 이를 위하여 한 종류의 이성질체만을 선택적으로 생산하는 젖산균주를 탐색하여 분리함으로써 광학적으로 순수한 산물을 얻을 뿐만 아니라 이러한 발효법에 의한 젖산생산은 자연계에 풍부한 starch나 cellulose, 음식물쓰레기와 같은 재생 가능한 자원을 기질로 사용하여 젖산발효에서 전문이 당화 공정에 필요한 시간과 노력을 최소화하며 젖산 생산에 드는 전체적인 비용을 절감할 수 있다. 전분을 직접 이용하는 것은 젖산균의 일반적인 성질이 아니므로 전분이 풍부한 누룩을 수집하여 직접적으로 전분을 분해하여 젖산발효을 수행하는 균주를 누룩에서 분리하였다. 분리균주는 형태학적, 배양학적, 생화학적 특성 및 16s rDNA 분석을 통하여 Enterococcus sp으로 동정되어 Enterococcus sp JA-27로 명명하였다. 생육에 따른 L-latic acid의 최적 생산 조건을 검토한 결과, 최적 배지조건은 탄소원으로 1.5% soluble starch, 질소원으로 3.5% tryptone, 그 외의 다른 조성들은 0.1% K₂HPO₄, 0.04% MgSO₄·7H₂O, 0.014% MnSo₄·4H₂O, 0.004% FeSO₄·7H₂O이었고 최적 배양조건은 30℃, pH 8이었다. 대량생산을 위한 기초자료를 제공하기 위하여 희분배양과 유가배양을 실시하였고, 희분배양이 L-lactic acid의 생산수율(0.134 g, L-latic acid/g, soluble starch)이 더 높게 나타나 효과적이었다. 7 L 발효조 배양시 pH를 cotrol한 결과, L-lactic acid 생산이 삼가플라스크에 비해 1.5배 더 증가하였다. 배지 중의 젖산을 정제하기 위한 방법으로 이온교환 칼럼크로마토그라피(ion-exchange columnchromatography)를 사용하였고 일련의 정제 과정을 통하여 배양액 중의 L-lactic acid 정제 수율은 약 85% 정도로 나타났으며 HPLC로 분석한 결과 99.7%의 순도를 확인할 수 있었다. Lactic acid bacteria with amylolytic and acid producing activities can ferment starch directly to lactic acid there by producing a monomer for the production of biodegradable poly lactic (PLA). In this study, the strain producing L-lactic acid from soluble starch was isolated from Nuruk. The isolated strain was identified as Enterococcus sp, through its morphological, cultural, biochemical characteristics as well as the 16S rDNA sequence analysis, and named Enterococcus sp, JA-27. Enterococcus sp. JA-27 produced exclusively L-lactic acid from soluble starch as a carbon source. The optimal conditions for the maximum production of L-lactic acid from Enterococcus sp. JA-27 were 30℃, pH 8, 1.5% soluble starch as a substrate and 3.5% tryptone as a nitrogen source, 0.1% K_(2)HPO_(4) 0.04% MgSO_(4)ㆍ7H_(2)O, 0.014%MnSO_(4)ㆍ4H_(2)O, 0.004% FeSO_(4)ㆍ7H_(2)O. Batch and fed batch culture were carried out and the former was more effective. L-Lactic acid production in the optimum medium was significantly increased in a 7L jar fermenter, where the maximum L-lacitc acid concentration was 3 g/L. For the purification of lactic acid in fermented broth, two stage ion-exchange column chromatographies were employed and finally identified by HPLC.

읽기장애 아동의 음운처리 능력 특성 연구

김미경,서경희 한국특수교육문제연구소 2003 특수교육저널 : 이론과 실천 Vol.4 No.4

최근 읽기장애와 언어와의 관계의 중요성이 부각되면서 음운처리 결함이 읽기장애의 원인으로 널리 받아들여지고 있다. 이에 본 연구는 2학년, 4학년 일반아동 29명과 읽기장애아동 23명을 대상으로 음운인식능력 검사와 단어회상하기 검사, 문장회상하기 검사, 글자, 숫자, 사물, 색깔명명하기 검사를 통한 읽기장애아동들의 음운처리능력 특성을 연구하였다. 연구 결과 읽기장애아동들은 일반아동들에 비해 음운인식, 작업기억, 명명속도에서 유의미한 차이를 보였다. 이러한 결과를 바탕으로 일반학급과 특수학급에서 읽기장애 아동들을 지도하는 프로그램개발에 기여할 것을 제안한다. The purpose of this study was to investigate difference between normal children and children with reading disabilities, ranged from grade 2 to grade 4 in phonological processing ability. The sample was classified into two groups: (1) a group of 23 children with reading disabilities; (2) a group of 29 normal children. Students in the sample of this study do not have severe emotional problems, uncorrected vision problems, hearing loss, acquired neurological disorders. The results of this study were as follows: 1.Children with reading disabilities performed significantly poorly on test of phonological awareness than children without reading disabilities. 2.Children with reading disabilities performed significantly poorly on test of working memory than children without reading disabilities. 3.Children with reading disabilities performed significantly poorly on test of naming speed than children without reading disabilities. There is also interaction effect between the presence or absence of reading disability and grade on naming speed.

집단유전 개념 학습에서 귀납적-연역적인 수업효과 비교

김위경,이미숙,이길재 한국과학교육학회 2003 한국과학교육학회지 Vol.23 No.2

본 연구는 집단 유전(하디-바인베르크 법칙)개념 학습에 있어서 귀납적 지도 방법과 연역적 지도방법에서 효과의 차이를 알아보고 학습자의 인지적 특성에 맞는 수업모형에 대한 시사점을 얻고자 하였다. 연구대상은 고등학교 남학생 180명이며 90명은 귀납식 수업모형, 90명은 연역식 수업모형으로 수업을 하였다. 인지적 특성을 파악하기 위해서 논리적 사고력 검사(GALT)와 인지양식 검사(GEFT)를 실시하였다. 본 연구의 결과는 다음과 같다. 첫째, 귀납적인 지도 방법이 연역적인 지도방법에 비해서 유의도 수준 0.01에서 개념 검사 및 성취도 검사에서 유의미하게 효과적인 것으로 나타났다. 둘째, 귀납적 지도방법이 형식적 조작기의 학생과 장 독립적 학생에게 있어서 연역적 地도방법에 비해 더 효과적인 것으로 나타났다. 셋째, 인지수준이 과도기에 있는 학습자와 장의존적인 학습자에 있어서는 연역적 수업이 평균으로 볼 때는 효과적이었으나 통계적으로는 의미가 없었다. 이러한 결과는 교사들의 학습전략을 다양화 및 학습자의 인지수준과 인지양식에 대한 고려가 필요함을 시사해준다. The purposes of this study was to investigate the effect of inductive Instructional method and deductive one concerning the learners' population genetic concepts and achievement according to learners' cognitive characteristics. For the study, 180 students were sampled from a boys' high school: 90 students for inductive teaching method and 90 students for deductive teaching method. Group Assessment of Logical Thinking(GALT) and Group Embedded Figure Test(GEFT) were used as the measure of cognitive characteristics. The results of this study were as follows. 1) The inductive instructional method was more effective in the understanding of population genetic concepts and their achievement. 2)Inductive instructional method was more effective than deductive one for the learners in formal operational level and in field independent cognitive style. 3) For the learners in a transitional level and field dependent cognitive style, deductive instructional way was more effective than inductive way on the average, but it was not statistically significant. It was turned out that learners' cognitive level was one of important factors when teachers instruct the concept of population genetics.

즉흥사고를 이용한 글쓰기 전략 개발 연구

김재수,임성규,김재봉,정경미 광주교육대학교 초등교육연구소 2001 初等敎育硏究 Vol.15 No.2

The purpose of this study was to develop an writing strategy with brainstorming. Concrete instructional contents for the dvelopment of writing strategy with brainstorming and the continuous application of the strategy to the whole writing's processes were developed here. And its method of application to elementary school and university were also described. The modern writing theory which reflects the importance of thinking had emphasis on the diversification of thinking ability. From this point of view, brainstorming which is adopted to a way of enhancing thinking ability was applied to students' writings. Brainstorming aims to pull out the unique idea from the consciousness of students and this study tried to develop continuous model of writing strategy through brainstorming. The advantage of continuous model could be in teaching the students interactively for whole writing processes. This study showed that brainstorming could be applied to the whole writing process, idea production - idea construction - paragraph writing, and described the results of its application at the order of method - application - consideration of instruction.

연무에 있어서 대규모 대기 확산현상의 수치해석

윤경미,배명환,김정민 경상대학교 생산기술연구소 2002 工學硏究院論文集 Vol.2 No.-

The spectral finite difference method with a highly spatial resolution and a fast computation speed is applied to simulate the numerical analysis of large-scale atmospheric diffusion phenomenon in smog. A two-dimensional domain as an analytic object is selected, and an analytic fluid is assumed to be laminar, incompressible and viscous. Heat flux and smog inflow are taken in a fixed section on an abscissa as a fire phenomenon. Two-dimensional Navier-Stokes equations with a buoyancy under Boussinesq assumption, continuity equation, energy equation and diffusion equation as governing equations are used. Using a conformal boundary-fitted coordinate system, numerical analyses are performed on various conditions. Dimensionless values of concentration, temperature and stream function increase with the Grashof number. Only dimensionless concentration increases with dimensionless diffusion coefficient, but dimensionless values of temperature and stream function are not changed with dimensionless diffusion coefficient. Except dimensionless values of stream function, concentration and temperature decrease with increasing the Reynolds number.

딸기 와인 개발을 위한 최적 발효 조건

김민기, 박미성, 엄은경, 조은혜, 이종수 배재대학교 자연과학연구소 2016 自然科學論文集 Vol.27 No.1

Optimal fermentation condition for development of new strawberry wine were investigated. Commercial yeast, Fermivin was good for brewing of strawberry wine and its optimal addition concentration was also 1%. Maximal ethanol content of strawberry wine was obtained when raw strawberry juice(24 brix) was fermented by 1% Fermivin at 25℃ for 7 days and its antioxidant activity was 78.5%. 새로운 딸기 와인을 개발하기 위한 최적 발효조건을 연구하였다. 시판효모인 페미빈이 딸기와인 제조에 제일 좋았고 1%가 최적 첨가 농도이었다. 딸기와인의 최대 에탄올 생성량은 생딸기주스 (24brix)를 1% 페미빈으로 25℃에서 7일 발효시켰을 때 얻어졌고 이 발효액의 항산화활성은 78.5% 이었다.

감자를 첨가한 기능성 크림수프의 품질 특성

한경필,한재숙,소기신행,김동석,박미란,이갑랑 한국조리과학회 2005 한국식품조리과학회지 Vol.21 No.1

The purpose of this study was to investigate the quality characteristics of potato added functional cream soup. The highest crude protein (p<.01) and crude lipid (p<.001) were for the potato soup with added potato peel (S₃). The highest pH of 5.95 was for the potato soup with added potato peel (S₄). The highest lightness of 69.46(1, value) was for the potato soup with added potato peel (S₃) (p<.01). The redneess(a value) and yellowness(b value) were increased by the adding of potato peel to the potato soup(p<.01). Viscosity was increased by potato content, and was the highest for the potato soup (S₂) (p<.001). The glycoalkaloid content of the potato soup with added potato peel was 175 mg and 2.20 mg, for Si and S4 respectively. In sensory evaluation. the highest sensory scores for flavor and taste (p<.05) of mean 3.55 and 3.45, respectively, were obtained from the potato soup with added potato peel (S₄). The highest overall acceptability of mean 3.00 was for the potato soup with added potato peel (S₃) (p<.01).