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생명과학 2 교육과정 및 교과서에 나타난 원핵생물의 유전자 발현 조절 관련 내용 분석
안주현 ( Ju Hyun Ahn ),전상학 ( Sang Hak Jeon ) 韓國生物敎育學會 2015 생물교육 Vol.43 No.2
In the 2015 Korean College Scholastic Ability Test (CSAT), the Korea Institute for Curriculum and Evaluation (KICE) decided to acknowledge two answers for a question related to the regulation of gene expression because of a presentational problem. In this research, the Korean science curricular and the Life Science2 textbooks were analyzed in order to diagnose the presentational problem, and we tried to suggest how to improve them. Regulation of gene expression is a key process that explains the molecular control of genetic information, and since the fourth curriculum it has continuously been included in Korean science courses with the exception of the sixth curriculum. All textbooks written according to the 2009-revised curriculum contained the subject of gene expression control; however there is lack of explanation about the scientific terms and connection with the previous class in most textbooks, and there even was a case with scientific errors. The new scientific terms in Life Sciences2 should be sufficiently explained and linked to the basic concept of gene in modern life science perspective because many new terms appeared in modern life science textbooks, and most of them are on the gene concept. It also needs to reflect these in the revision of the curriculum and improve the expression for the terms in the new textbook.
인산활성화제에 의한 폐호도껍질을 원료로 한 활성탄제조 및 이의 중금속 이온 흡착특성
이고은,안주현,김동수,Lee Go-Eun,Ahn Ju-Hyun,Kim Dong-Su 한국자원리싸이클링학회 2003 資源 리싸이클링 Vol.12 No.3
폐호도껍질을 원료로 활성탄을 제조하는 과정에서 활성화 온도, 활성화 시간, 활성화제의 양, 그리고 활성화제의 종류 등을 변수로 하여 활성화 특성을 조사하였다. 인산을 활성화제로 사용하여 제조된 활성탄은 그 흡착능이 온도가 증가함에 따라 증가하여 약 $550^{\circ}C$부근에서 최대 흡착능을 보였으며 그 수율은 온도 상승에 따라 지속적으로 감소하였다. 활성화 시간은 약 2시간 정도에서 최적의 조건을 보였으며 시간이 증가함에 따라 활성탄의 수율은 계속 감소하였다. 활성화제의 농도 증가에 따라 수율은 지속적으로 상승하였으며 흡착능 또한 증대되다가 약 1.5M $H_3PO_4$ 이상의 조건에서는 오히려 흡착능이 감소하였다. SEM으로 관찰한 조건에 따른 활성탄의 미세구조의 변화는 조건별 흡착능의 변화와 잘 일치되었으며 활성화제의 종류는 활성화 과정에서 중요한 영향을 미치는 것으로 조사되었다. 제조된 활성탄의 흡착특성을 파악하기 위해 $Cu^{2+}$ 이온을 흡착질로 하여 흡착반응을 조사한 결과, 흡착반응은 전체적으로 2차식을 따르는 것으로 관찰되었으며 흡착질의 초기 농도가 감소함에 따라 반응상수는 점차 증가하였다. 평형흡착량은 Freundlich Model 을 잘 따르는 것으로 나타났으며 온도별 흡착반응을 검토한 결과, 중금속 이온의 흡착은 흡열반응의 특성을 나타내었다. 흡착에 따른 Activation Energy는 약 13.07kcal/mol로 산출되었으며 van't Hoff Equation을 이용하여 흡착반응의 열역학적 인자들을 계산하였다. The production characteristics of activated carbon from waste walnut shell have been investigated by taking activation temperature, activation time, amount of activating agent, and kind of activating agent as the major influential factors. The adsorption capacity of the activated carbon which was produced using phosphoric acid as the activating agent increased with activation temperature and showed its greatest value at about $550^{\circ}C$. Yield for activated carbon was observed to decrease continuously as the activation temperature was raised. The optimal activation time for the highest adsorption capacity was found to be about 2 hr, and as the activation time increased the yield for activated carbon was showed to decrease continuously. The increase in the amount of activating agent resulted in the increase of the yield for activated carbon, however, excessive amount of activating agent deteriorated its adsorption capacity reversely. The variations of the microstructure of activated carbon observed by SEM with several influential factors, correlated very well with its changes in the adsorbability with the same factors and the kind of activating agent was found to play an important role in the determination of the adsorption capacity of activated carbon. To investigate the adsorption characteristics of the produced activated carbon, the adsorption reactions of $Cu^{2+}$ ion were examined using the produced activated carbon as the adsorbent. In general, the kinetics of the adsorption of $Cu^{2+}$ ion was observed to follow a 2nd-order reaction and the rate constant for adsorption reaction increased as the initial concentration of adsorbate was diminished. The equilibrium adsorption of $Cu^{2+}$ was explained well with Freundlich model and its adsorption reaction was found to be endothermic. The activation energy for adsorption was calculated to be 13.07 kcal/mol, which implied that the adsorption reaction was very irreversible, and several thermodynamic parameters of adsorption reaction were estimated using van't. Hoff equation and thermodynamic relationships.
마이크로파 조건에서 풀러렌 산화물 [C70On](n=1~3 or n=1)의 합성
고원배 ( Weon Bae Ko ),안주현 ( Ju Hyun Ahn ),임영아 ( Young A Lim ),한지연 ( Ji Yeon Han ),한동설 ( Dong Sul Han ) 한국고무학회 2004 엘라스토머 및 콤포지트 Vol.39 No.4
풀레렌[C_(70)]을 3-chloroperoxy benzoic acid, chromium (VI) oxide, benzoyl peroxide, trichloroisocyanuric acid 등의 산화제를 사용하여 1마이크로파 조건에서 반응시켜 풀러렌 산화물 [C_(70)O_(n)] (n=1~3 or n=1)을 합성하였다. 동일한 마이33.파 조.건에서 여러가지 산화제와 풀러렌 [C_(70)]의 고체상태 반응성은 3-chloroperoxy benzoic acid > rhromium(VI) oxide > trichloroisocyanuric acid ?? benzoyl peroxide 순으로 증가함을 나타냈다. MALDl-TOF MS, UV-visible, 그리고 HPLC를 사용하여 분석한 결과 생성된 풀러렌 산화물은 [C_(70)O_(n)] (n=1~3 or n=1)임을 알 수 있었다. Synthesis of fullerene oxides [C_(70)O_(n)] (n=1~3 or n=1) in solid state by fullerene [C_(70)] and several oxidants such as 3-chloroperoxy benzoic acid, chromium(VI) oxide, benzoyl peroxide, and trichloroisocyanuric acid was taken place under microwave irradiation. The reactivity in solid state of fullerene [C_(70)] with various oxidants under same microwave condition increased in the order of 3-chloroperoxy benzoic acid > chromium(VI) oxide > trichloroisocyanuric acid benzoyl peroxide. The MALDI-TOF-MS, UV-visible spectra and HPLC analysis confirmed that the products of fullerene oxidation were [C_(70)O_(n)] (n=1 -3 or n=1).
리튬 유황전지용 폴리우레탄 고분자 전해질의 전기화학적 특성
김형주,신준호,김종화,김기원,안효준,안주현,Kim, Hyeong-Ju,Shin, Joon-Ho,Kim, Jong-Hwa,Kim, Ki-Won,Ann, Hyo-Jun,Ahn, Ju-Hyun 한국전기화학회 2002 한국전기화학회지 Vol.5 No.2
본 연구에서는 높은 인장강도와 탄성력을 가지는 다공성 폴리우레탄(polyurethane, PU)을 지지체(matrix)로 이용하고, 유기 전해액 ethylene carbonate(EC), propylene carbonate(PC), tetraethylene glycol dimethylether(TG)와 1M $LiCF_3SO_3$를 부피비 1:1 비율로 혼합하여 액체 전해액을 제조하였으며, 높은 이론용량을 가지는 Li/S전지에 적용하여 전기 화학적 특성을 조사하였다. 1M $LiCF_3SO_3$에 TG를 첨가할 경우 유기 전해액의 함침량이 약 $750\%$ 증가하였으며 방전용량$(1065mAh/g{\cdot}sulfur)$ 및 사이클 특성이 가장 우수하였다. 1M $LiCF_3SO_3$에 TG/EC(v/v,1:1) 및 PC/EC(v/v,1:1)를 첨가한 경우 이온 전도도는 각각 $3.15\times10^{-3}(S/cm)$ 와 $3.18\times10^{-3}(S/cm)$로 나타났다. Polyurethane was used as matrix for polymer electrolytes with liquid electrolyte consist of organic solvent as ethylene carbonate(EC), propylene carbonate(PC), and tetraethylene glycol dimethylether(TG) and 1M $LiCF_3SO_3$, which has high mechanical strength and porosity. Electrochemical properties fur polyurethane electrolytes with various liquid electrolytes were evaluated. The amount of immersed liquid electrolyte for TG with 1M $LiCF_3SO_3$ was increased to about $750\%$ by weight, and initial discharge capacity and cycle performance was better than others. Ionic conductivity for TG/EC(v/v,1:1) and PC/EC(v/v, 1:1) with 1M $LiCF_3SO_3$ was about $3.15\times10^{-3} S/cm, \;3.18\times10^{-3}S/cm$
롤투롤 나노임프린팅 및 금속 경사증착 기반 대면적 유연 기판 상 3D LSPR 구조의 연속적 제작 및 투명센서 소자 응용
위정섭(Jung-Sub Wi),오동교(Dong Kyo Oh),이성호(Sung Ho Lee),이승조(Seungjo Lee),이규태(Kyu-Tae Lee),김정대(Jeong Dae Kim),이재혁(Jae Hyuk Lee),안주현(Ju Hyun Ahn),이원석(Won Seok Lee),지강민(Kang Min Jee),박인규(Inkyu Park),곽문규(Moon 한국기계가공학회 2017 한국기계가공학회 춘추계학술대회 논문집 Vol.2017 No.4
The Oxidation of Fullerene[C_(60)] using Several Oxidants under Microwave Irradiation
Ko, Weon Bae,Hwang, Sung Ho,Ahn, Ju Hyun 한국고무학회 2005 엘라스토머 및 콤포지트 Vol.40 No.1
풀러렌[C_(60)]은 3-chloroperoxy benzoic acid, benzoyl peroxide, trichloroisocyanuric acid, chromium(Vl) oxide 등의 산화제를 사용하여 마이크로파 조건에서 반응시켜 풀러렌 산화물[C_(60)(O)_(n)](n=1~4 or n=1)을 합성 하였다. 동일한 마이크로파 조건에서 여러 가지 산화제와 풀러렌[C_(60)]의 고체상태 반응성은 3-chloroperoxy benzoic acid > benzoyl peroxide > trichloroisocyanuric acid??chromium(Vl) oxide 순으로 증가함을 나타냈다. MALDI-TOF-MS, UV-visible, 그리고 HPLC를 사용하여 분석한 결과 생성된 풀러렌 산화물은[C_(60)(O)_(n)] (H=1~4 or n=1)임을 알 수 있었다. Synthesis of fullerene oxides[C_(60)(O)_(n)] (n=1~4 or n=1) by fullerene[C_(60)] and several oxidants such as 3-chloroperoxy benzoic acid, benzoyl peroxide, trichloroisocyanuric acid, and chromium(VI) oxide took place under microwave irradiation. The reactivity in solid state of fullerene[C_(60)] with various oxidants under same microwave condition increased in order of 3-chloroperoxy benzoic acid > benzoyl peroxide > trichloroisocyanuric acidchromium(VI) oxide. The MALDI-TOF-MS, UV-visible spectra and HPLC analysis confirmed that the products of fullerene oxidation were [C_(60)(O)_(n)] (n=1~4 or n=1).