황산용액(黃酸溶液)으로부터 이온교환수지(交換樹脂) Lewatit TP 220에 의한 니켈의 회수(回收)

강남희,박경호,Kang, Nam-Hee,Park, Kyung-Ho,Parhi, P.K. 한국자원리싸이클링학회 2011 資源 리싸이클링 Vol.20 No.6

황산용액 중에 존재하는 니켈을 회수하기 위해 이온교환수지법을 이용한 기초연구를 수행하였다. 제조된 모의 니켈(Ni)용액에 독일 Lanxess사(社)의 Lewatit Monoplus TP 220를 이용하여 회분식 실험을 하였다. 흡착반응에 영향을 미치는 온도, 교반속도, 반응시간, pH, 이온교환수지 양, 니켈이온농도 등에 대해 고찰하였다. 초기 pH(2.0~5.0)와 교반속도는 니켈의 흡착에 거의 영향을 미치지 않았으며, 평형에 도달하기 위하여 72시간의 시간이 필요했다. 평형실험결과 Freundlich 흡착등온식에 적합하였고, 흡착반응속도는 유사 2차 반응 모델(pseudo-second order)로 잘 모사되었다. 한편 니켈을 함유한 실제 도금세정폐액의 흡착 실험을 행하여 모의용액의 흡착거동과 비교하였고, 흡착된 니켈은 황산 농도가 높아짐에 따라 수지로부터 효과적으로 용리되었다. The adsorption of nickel(Ni) from sulfuric acid solution was carried out by ion exchange method. A series of batch tests in synthetic solutions were carried out using Lewatit Monoplus TP 220 resin. The following experimental parameters, such as temperature, shaking rate, reaction time, pH, resin dosage and concentration of nickel ions etc. were investigated to establish the effective optimum conditions of nickel adsorption. The solution pH(2.0~5.0) and shaking rate had little effects on the adsorption of nickel and adsorption time of 72hours was required to reach equilibrium. The experimental results show a good agreement with Feundlich isotherm and pseudo-second order reaction. The adsorption behavior of Ni obtained from synthetic solution was compared with that of waste electroplating solution. Elution of nickel from loaded resin increased with increase in $H_2SO_4$ concentration.

하동화력발전소 비산재의 입도크기와 미연탄소 함량이 지오폴리머의 압축강도에 미치는 영향

강남희,전철민,주형태,이수정,Kang, Nam-Hee,Chon, Chul-Min,Jou, Hyeong-Tae,Lee, Sujeong 한국재료학회 2013 한국재료학회지 Vol.23 No.9

Fly ash is one of the aluminosilicate sources used for the synthesis of geopolymers. The particle size distribution of fly ash and the content of unburned carbon residue are known to affect the compressive strength of geopolymers. In this study, the effects of particle size and unburned carbon content of fly ash on the compressive strength of geopolymers have been studied over a compositional range in geopolymer gels. Unburned carbon was effectively separated in the $-46{\mu}m$ fraction using an air classifier and the fixed carbon content declined from 3.04 wt% to 0.06 wt%. The mean particle size ($d_{50}$) decreased from $22.17{\mu}m$ to $10.79{\mu}m$. Size separation of fly ash by air classification resulted in reduced particle size and carbon residue content with a collateral increase in reactivity with alkali activators. Geopolymers produced from carbon-free ash, which was separated by air classification, developed up to 50 % higher compressive strength compared to geopolymers synthesized from raw ash. It was presumed that porous carbon particles hinder geopolymerization by trapping vitreous spheres in the pores of carbon particles and allowing them to remain intact in spite of alkaline attack. The microstructure of the geopolymers did not vary considerably with compressive strength, but the highest connectivity of the geopolymer gel network was achieved when the Si/Al ratio of the geopolymer gel was 5.0.

생장조절제 처리가 오이의 자성화 (雌性花) 계통 유지를 위한 웅화 (雄花) 발생에 미치는 영향

강남희(Nam Hee Kang),은종선(Jong Seon Eun) 전북대학교 농업과학기술연구소 1999 농업생명과학연구 Vol.30 No.-

모바일 환경에서 TV드라마를 통한 듣기 및 어휘 교수 학습 모형 연구

강남희(Kang Nam-Hee),김지영(Kim Jie-Young) 팬코리아영어교육학회(구 영남영어교육학회) 2007 영어교육연구 Vol.19 No.1

  The purpose of this study is to present the teaching and learning model for English listening skills and vocabulary in a mobile environment using a TV drama. The strength of mobile learning is that it is easy to carry a mobile device and to access the Internet to get information whenever and wherever users want. It could provide self-directed learning opportunities to learners. As a learning resource, TV drama is useful to improve English listening skills and vocabulary because it uses authentic language in English-spoken culture as well as makes learning interesting. The model for the mobile learning using TV drama presented here is expected to improve English listening skills and vocabulary for university students. The model is designed for a specific mobile device, a PDA and it consists of 6 steps for a week. The first step on Monday is designed for a real classroom with a teacher and the consecutive five steps from Tuesday to Saturday can be applied at anytime and anyplace that learners want. This study is expected to contribute to better understanding of English mobile learning contents and design of them.

IB 교육과정을 활용한 2015 개정 지리 교육과정의 적용방안 탐구

강남희(Nam-Hee Kang),강현석(Hyeon-Suk Kang) 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.6

최근에 공교육의 문제 해결에 대한 논의가 다양하게 전개되고 있는 가운데 IB 교육과정에 대한 관심이 증가하고 있다. 주지하다시피 IB 교육과정은 국제 바칼로레아 교육과정으로 국제적으로 승인된 교육과정을 말한다. 학교급별로 교육과정 유형은 초등학교 수준(PYP), 중학교 수준(MYP), 고등학교 수준(IBDP)으로 이루어져 있으며, 각 유형별로 이수 교과목과 이수 기간, 이수 시간 및 방법, 평가방법 등이 제시되고 있다. 학교급별 프로그램도 다양하지만, 특히 타당하고 신뢰로운 평가방법으로 인해 국제적으로 그 타당성을 인정받고 있다. 현재 한국에서 IB에 대한 일반적 논의는 어느 정도 이루어지고 있으나 교과의 입장에서 구체적인 적용의 사례는 많지 않은 편이다. 교과 교육과정 개발의 측면에서 보면 IB 교육과정은 그 속에 교육과정 재구성, 수업 방법, 평가방법에서 매우 혁신적인 아이디어들을 내포하고 있는 것으로 평가받고 있다. 본 논문에서는 이러한 IB 교육과정이 지니는 의의를 몇 가지 측면에서 살펴보고, 이어서 2015 개정 지리과 교육과정에 적용 가능한 방안을 개괄적으로 탐색해보고자 한다. 특히 최근의 개정 지리과 교육과정의 성취기준 재구성, 탐구중심의 수업 방법 변화, 내부 평가라고 알려진 학교 내의 수행평가를 구현하는 방안에 대해서 살펴보고자 한다. 본 연구에서 논의된 교과 적용방안이 타 교과의 수업 실천으로 확장되는 촉매제가 될 것으로 기대해본다. There are many discussions about the general nature and curricular patterns of International Baccalaureate curriculum system in Korea. In the process of doing research and practice, we usually meet the ambiguity and vagueness of the IB curriculum system in view of theoretical stance. In this study, we try to search the value of International Baccalaureate(IB) Curriculum and to find the its applicative method in Geography as a subject. International Baccalaureate(IB) Curriculum refers to the internationally authorized curriculum by the International Baccalaureate Organization based on curriculum development, change of teaching strategy and evaluation reform. The pattern of IB Curriculum management is classified into three or four categories: primary year plan, middle year plan, and International Baccalaureate Diploma. We approach to the meaning and value of IB Curriculum, and then to study the application of IB curriculum into Korean Geography 2015 revision curriculum in schooling. The applicative framework of 2015 revision Geography curriculum within IB curriculum is composed of reconstruction of achievement standards, innovative change of Geography instruction, and performance task-typed evaluation. In the future of IB curriculum system, we should theorize and practice the IB learner profiles and concept-based curriculum development. Now Korean context of schooling is interwoven with so called the ‘teaching to the test’. To overcome the lasting problems of national exam, we may try to see and practice IB curriculum development.

상업용 메디컬푸드 및 탄수화물 급원의 발효성 당류 함량에 관한 연구

신희창(Hee-Chang Shin),강남희(Nam-Hee Kang),이장운(Jang-Woon Lee),이윤복(Yoon-Bok Lee),이균희(Kyun-Hee Lee),오승현(Seung-Hyun Oh) 한국식품영양과학회 2015 한국식품영양과학회지 Vol.44 No.8

본 연구에서는 최근 연구 결과들에 기초하여 발효성 당류인 FODMAP(fermentable oligosaccharides, disaccharides, monosaccharides, and polyols)이 설사와 높은 상관성을 가지고 있을 것이라 판단하였다. 따라서 상업용 메디컬푸드와 탄수화물 급원으로부터 FODMAP 함량을 측정하였다. 상업용 메디컬푸드의 단당류(fructose)와 이당류(lactose)의 함량 범위는 각각 ND~0.158, ND~0.304 g/200 mL였다. 삼당류(raffinose)와 사당류(stachyose)의 함량 범위는 각각 0.051~0.738, ND~0.579 g/200 mL였다. 또한 프럭토올리고당의 함량 범위는 1-kestose ND~0.413 g/200 mL, nystose ND~1.239 g/200 mL, 1-fructofuranosylnystose 0.205~0.458 g/200 mL였다. 탄수화물 급원 중단당류(fructose)는 치커리 식이섬유(18.877±4.320 g/kg)에서만 검출되었으며, 이당류(lactose)는 모든 급원에서 검출되지 않았다. 삼당류(raffinose)의 함량은 치커리 식이섬유 61.523±3.014 g/kg, 대두 식이섬유 3.273±0.499 g/kg, 난소화성 말토덱스트린 5.430±0.671 g/kg, 말토덱스트린(DE10~15, DE15~20)에서는 검출되지 않았다. 사당류(stachyose)의 함량은 치커리 식이섬유 78.817±5.483 g/kg, 대두 식이섬유 5.547±0.822 g/kg, 난소화성 말토덱스트린 13.180±1.165 g/kg, 말토덱스트린(DE10~15) 16.440±0.370 g/kg, 말토덱스트린(DE15~20) 22.553±1.491 g/kg이었다. 프럭토올리고당(1-kestose, nystose, 1-fructofuranosylnystose)의 함량은 치커리 식이섬유 29.369±2.553, 39.430±6.740, 50.407±2.642 g/kg, 대두 식이섬유 ND, ND, 18.647±0.397 g/kg, 난소화성 말토덱스트린 ND, 16.667±1.719, 17.107±1.814 g/kg, 말토덱스트린(DE10~15) ND, ND, 16.533±2.083 g/kg, 말토덱스트린(DE15~20) ND, ND, 27.490±1.783 g/kg이었다. FODMAP은 탄수화물의 일종으로 메디컬푸드 제품의 탄수화물과 FODMAP 함량 간에 양의 상관관계를 가질 것으로 예상하였으나 r=0.55로 밀접한 상관성을 나타내지는 않았다. 국내외 메디컬푸드는 모두 유사한 원재료와 영양설계로 구성되어 있으나 사용되는 원재료의 종류에 따라 유래되는 FODMAP 함량이 다르기 때문에 제품 간의 함량 차이가 있는 것으로 생각된다. 본 연구에서 측정된 상업용 메디컬푸드 제품 및 탄수화물 급원의 FODMAP 함량 분석은 상대적으로 부족한 FODMAP 정량 분석 연구에 활용될 것으로 생각되며, 나아가 경관급식의 주요 부적응증인 설사를 최소화하는 메디컬푸드의 제품개발 및 원재료 선정에 기초 자료로 활용될 것이다. Medical foods are enteral nutrition for patients, but they cause maladaptation symptoms like diarrhea. Although the cause of diarrhea remains unknown, some studies have indicated that the cause of diarrhea is fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP). This is a consideration for medical foods since they are easily fermented by intestinal bacterial. In this study, we estimated the FODMAP contents of commercial medical foods and carbohydrate ingredients. We measured the concentrations of FODMAP in 13 types of different medical foods and five types of carbohydrate ingredients by using high performance liquid chromatography with an evaporative light scattering detector (HPLC-ELSD). The limits of detection of FODMAP were fructose, 0.002; lactose, 0.010; raffinose, 0.003; stachyose, 0.032; 1-kestose, 0.005; nystose, 0.012; and 1-fructofuranosylnystose, 0.003 mg/kg. Limits of quantitation of FODMAP were fructose, 0.008; lactose, 0.033; raffinose, 0.009; stachyose, 0.107; 1-kestose, 0.015; nystose, 0.042; and 1-fructofuranosylnystose, 0.011 mg/kg, respectively. Concentration of FODMAP ranged from 0.428∼2.968 g/200 mL. Concentrations of carbohydrate ingredients in FODMAP were chicory fiber, 278.423; soy fiber, 27.467; indigestible maltodextrin, 52.384; maltodextrin (DE10∼15), 32.973; and maltodextrin (DE15∼20), 50.043 g/kg. Contents of carbohydrates were 19.0∼41.0 g/200 mL in commercial medical foods. We expected a correlation between contents of carbohydrates and FODMAP, as carbohydrates included FODMAP. However, we detected a low correlation (r=0.55). Since most commercial medical foods have a similar carbohydrate ingredients and nutritional values, the difference between products was determined by FODMAP contents of carbohydrate ingredients. In this study, we analyzed FODMAP contents of commercial medical foods and carbohydrate ingredients. These results are expected to be utilized as basic data for product development and minimizing maladaptation of medical foods.

화력발전소 매립 석탄재의 분쇄가 지오폴리머의 강도에 미치는 영향

이수정,강남희,전철민,주형태,Lee, Sujeong,Kang, Nam-Hee,Chon, Chul-Min,Jou, Hyeong-Tae 한국자원리싸이클링학회 2014 資源 리싸이클링 Vol.23 No.6

화력발전소 바닥재는 입자크기의 범위가 넓고 미연탄소 함량이 높아 지오폴리머의 원료로 잘 사용되지 않는다. 지오폴리머의 원료로서 바닥재가 대부분인 매립 석탄재를 대량 재활용하기 위한 가공공정을 평가하기 위하여 로드밀과 유성볼밀로 분쇄하여 지오폴리머의 강도에 미치는 영향을 알아보았다. 기계적 분쇄가 바닥재의 비정질 함량 변화에 미치는 영향은 거의 없었다. 이는 석탄재의 주요 결정질 상인 뮬라이트가 침상으로 존재하는데, 침상의 뮬라이트는 높은 강도와 인성을 갖기 때문에 비정질화되기 어렵기 때문으로 판단된다. 그러나 분쇄 효과는 입자크기를 감소시켰으며 매립 석탄재 입자의 크기 분포를 보다 균일하게 하여 알칼리와의 반응성을 증가시켰다. 로드밀은 상대적으로 입자크기의 범위를 좁게 만들었지만 입자크기 감소효과는 적었다. 그럼에도 불구하고 로드밀의 분쇄는 최대 약 37%의 압축강도를 증가시켰으며, 이는 유성볼밀의 효과와 동일하였다. 로드밀 분쇄는 매립 석탄재의 반응성을 증가시켜 지오폴리머의 원료로 대량 재활용하기에 적합한 공정이다. Bottom ash from coal fired power plants is not widely used due to a broad range of particle sizes and a high carbon content for producing geopolymers. The effect of mechanical activation on compressive strength of bottom ash- based geopolymers was examined by rod and planetary-ball milling to encourage full-fledged recycling of bottom ash, the main component of pond ash. The amount of amorphous component in the milled ash samples did not change significantly after the mechanical activation. It is presumably because needle-shaped mullite crystals, which is a major crystalline phase and grown in a glassy matrix, possess high strength and toughness, and therefore, they could endure external shocks and remain almost intact. Milling operation, however, decreased the particle size and improved the homogeneity of ash, thereby leading to increase reactivity of milled ash with alkali activators. Rod milling produced a relatively narrow particle size distribution of the milled ash particles; however, it was less effective in reducing the particle size. Nevertheless, it was interesting to observe that rod milling had equal effect on improving the compressive strength of geopolymers up to about 37%, as that of planetary ball milling. Rod milling is believed to be suitable process for enhancing the reactivity of bottom ash for large-scale recycling of bottom ash and producing geopolymers.

버퍼관리기술을 적용한 서비스거부 공격 탐지 기술

노희경(Noh Hee Kyeong),강남희(Kang Nam Hi) 한국통신학회 2011 한국통신학회 학술대회논문집 Vol.2011 No.11

고정형(固定形) Bed와 컬럼을 이용(利用)한 망간 단괴(團塊)에 의한 폐수(廢水) 중의 구리이온 제법(除去)

박경호,남철우,강남희,Park, Kyung-Ho,Nam, Chul-Woo,Kang, Nam-Hee 한국자원리싸이클링학회 2011 資源 리싸이클링 Vol.20 No.5

망간단괴는 높은 비표면적과 주 구성성분이 ${\delta}$-MnO$_2$ 이기 때문에 폐수 중의 중금속 흡착제로서 적합하다. 본 연구에서는 구리 함유 폐수를 이용하여 고정형 컬럼과 bed형 흡착장치를 사용하여 현장에서 망간단괴의 중금속 흡착제로서 사용 가능성에 대하여 검토하였다. l kg의 망간단괴 (입자크기 1-3 cm)를 사용하여 구리이온을 0.97 g/L 함유한 폐수를 3시간 처리한 결과 고정형 칼럼과 고정형 bed에서 각각 4.0g과 2.3g의 구리가 흡착, 제거되었다. The typical properties of manganese nodules are its high porosity and high specific surface area and manganese in nodules is existed as ${\delta}$-MnO$_2$. These properties suggest that manganese nodules ran be used as an adsorbent for heavy metal ions. This study investigated the practical applicability for the removal of copper ions in the waste water by manganese nodules as an adsorbent using fixed column and fix bed systems. Manganese nodules of 1kg (size 1-3 cm) can absorb 4.0g Cu in fixed column system and 2.3g Cu in fixed bed system from waste water for 3 hours respectively.

수박 시설재배에서 미생물제 투여에 따른 토양의 화학성과 생육 및 과실 특성

한석교 ( Suk Kyo Han,Nam ),강남희 ( Nam Hee Kang ),김준수 ( Jun Su Kim ),은종선 ( Jong Seon Eun ) 전북대학교 농업과학기술연구소 2011 농업생명과학연구 Vol.42 No.2

In this experiment, several commercial microbial fertilizers were tested to determine their effect on soil properties and the growth and fruit characteristics of ``Wooriccool`` watermelon. During 90 days, soil pH in ``EM1``, ``EM2`` and ``EM3`` significantly decreased, from 6.9 to 6.3. The microbial fertilizers except ``EM5`` seemed to reduce soil EC. Plant height and stem diameter were significantly longer in the ``EM2`` treatment, and the total number of leaves in ``EM1`` treatment was significantly greater than the control on growth characteristics of 32nd day after planting. In leaf length, ``EM5`` was significantly longer and the ``EM2`` treatment was shorter. Chlorophyll contents in ``EM2`` treatment was significantly higher them the other treatments. Stem length of 20-30th node was significantly longer in ``EM5`` treatment than the control on growth characteristics of 79th day after planting. Stem diameter in all the treatments was short and leaf width was significantly shorter in the ``EM2`` treatment. Fresh and dry weight of plants did not show a significant difference. The ftuit weight in ``EM3`` and ``EM4`` treatment were significantly higher at 8.6 kg and 8.6 kg respectively, but, there were not significantly different in soluble solids. EC in soil according to the number of soil irrigation by microbial fertilizer ``EM1`` and ``EM2`` did not show significant changes for 1 time but with ``EM1`` treatment for 15 days and 30 days after three times, it was reduced by 1.5 Ds. m-1, and 1.8 dS. m-1 respectively and in case of ``EM2`` treatment for 15 days and 30 days, it was reduced by 1.3 dS. m-1. Available phosphate content of soil tended to increase gradually compared with the initial time but it was small amount compared with the control of 781 mg. kg-1 except 30 days treatment of ``EM2`` that there were no significant differences. Among cation, with increase of the number of treatment, K+ had a tendency to increase in both the control and all treatments, Ca2+ and Mg2+ tended to increase in the control and others were decreased except for ``EM1`` for 15 days treatment. In the early growth stage, the stem length of 10 to 20th node with ``EM2`` for 30 days treatment was significantly shorter but leaf length, leaf width, petiole, and leaf area were significantly higher. Plant height and number of nodes on the late growth were significantly lower in ``EM2`` for 30 days treatment and significantly longer and more in ``EM1`` treatments. It did not show significant differences in other characteristics except that petiole length of ``EM1`` for 15 days treatment was significantly lower. Fresh and dry weight of plants were significantly heavy in ``EM1`` for 30 days treatment. And acute wilting degree was lower in all treatments, especially ``EM1`` treatments was lower. Fruit length on harvest time was significantly shorter in ``EM1`` for 15 days treatment, and fruit weight and soluble solids were a heavy tendency in all the treatments, especially ``EM1`` for 30 days treatment was significantly heavier.