Xylanase 첨가에 따른 수수의 제빵 적성 변화

안지은,고지연,고봉경,Ahn, Ji Eun,Go, Ji Yeon,Koh, Bong Kyung 한국식품조리과학회 2015 한국식품조리과학회지 Vol.31 No.1

This study investigated the baking properties of sorghum with the addition of xylanase or Pentopan, which is a baking additive containing xylanase. The control bread was made with a 30% substitution for wheat flour and the optimum level of enzyme addition was 0.75 mg/g flour for Pentopan and 5 mg/g flour for xylanase. The water binding capacity of wheat flour increased with the addition of sorghum, but decreased with the addition of either xylanase or Pentopan. The resistance of dough increased while extensibility decreased with the addition of sorghum; however, resistance decreased while extensibility increased with the addition of the enzyme. Specific volume of bread decreased significantly with the addition of sorghum. However, the specific volume was significantly recovered with the addition of enzyme. Crumb firmness was higher in the sorghum-added sample, but crumb firmness of the bread decreased with the addition of the enzyme. The crumb firmness of bread with added xylanase decreased significantly in 24 hours. These results demonstrated that adding sorghum with either xylanase or Pentopan that included xylanase increased specific volume and decreased crumb firmness whereas sorghum decreased the quality of fermented bread when added to wheat flour. The firmness rate of fermented bread particularly decreased with the addition of pure xylanase.

g-C(3)N(4)기를 가진 카본나노튜브의 산소 환원 반응 특성

안지은 ( Ji Eun Ahn ),김현종 ( Hyun Jong Kim ),한명근 ( M. K. Han ) 한국공업화학회 2010 응용화학 Vol.14 No.2

g-C(3)N(4)/CNT as non-platinum catalysts was thermally synthesized for ORR catalyst. The key properties of CNT for electrochemical devices are good electrical conductivity and large surface area with high porosity. ORR onset potentials of g-C(3)N(4) and g-C(3)N(4)/CNT catalysts were approximately 0.64 V (NHE) and current density was 4.5 mA/cm(2). As increasing the thermal treatment up to 600℃ the catalytic activity was strikingly improved.

김치에서 박테리오신을 생산하는 Lactobacillus sakei B16의 분리 및 특성 분석

안지은(Ji Eun Ahn),김진경(Jin Kyoung Kim),이형로(Hyeong Rho Lee),엄현주(Hyun-Ju Eom),한남수(Nam Soo Han) 한국식품영양과학회 2012 한국식품영양과학회지 Vol.41 No.5

본 연구는 김치 내에서 균들의 생육을 조절하고 김치의 저장성과 안전성을 향상시키고자 김치로부터 항균활성이 우수한 박테리오신 생산 유산균을 동정 및 박테리오신의 특성을 확인하고자 하였다. 그 결과 항균활성이 뛰어난 Lb. sakei B16을 선발하였고 이 균주에서 생산되는 박테리오신은 pH와 열에 안정하고 일반적으로 박테리오신이 그람 양성균을 저해하는 것에 비해 본 연구에서 분리한 박테리오신은 그람 음성 유해균을 저해하여 넓은 저해 범위를 갖는 장점이 있다. 반면, trypsin, proteinase K, α-chymotrypsin을 처리 하였을 때 항균 활성이 저하되는 것을 확인하였다. 따라서 본 연구에서 분리한 박테리오신은 다양한 환경 변화에서 안정하고 체내에 섭취되었을 때 단백질 가수분해 효소에 의해 분해됨으로써 인체에 영향을 주지 않을 것으로 생각된다. 또한 sakacin P cluster 염기서열 정보를 이용하여 Lb. sakei B16에서 박테리오신 유전자의 존재를 확인하였다. 본 연구를 통해 유산균이 생산하는 박테리오신을 이용하여 김치 제조 산업에서 스타터로 개발하여 김치 내에서 미생물의 생육을 조절하고 김치의 저장성과 품질을 향상시킬 수 있을 것이라 기대된다. Lactic acid bacteria (LAB) are able to secrete antimicrobial peptides called bacteriocins, which inhibit other bacteria such as pathogenic microorganisms. Therefore, bacteriocin-producing starters can be used as natural biopreservatives for various foods. The objective of this study was to screen and characterize bacteriocin-producing LAB from Kimchi and to investigate their applicability as a starter in Kimchi fermentation. To screen bacteriocin-producing LAB, gram-positive and gram-negative bacteria were used as indicators. To measure the antimicrobial activities of isolates, agar well diffusion assay method was used. According to the results, bacteriocin produced by Lb. sakei B16 showed antimicrobial activity against Listeria monocytogenes ATCC 19115, Escherichia coli KCTC 1467, and Lactobacillus plantarum KTCT 3104. Furthermore, bacteriocin was very stable after treatment with high temperature and high and low pH, but its effects were inhibited by treatment with proteolytic enzymes such as trypsin, proteinase K, and α-chymotrypsin, revealing their bacteriocin-like protein-based structure. These results suggest that Lb. sakei B16 and its bacteriocin are good candidates as a functional probiotic and natural biopreservative, respectively, in fermented foods.

비대칭 하이브리드 커패시터 전극으로서의 전도성고분자-CNT 복합재료 합성 및 특성화

안지은 ( Ji Eun Ahn ),문지훈 ( Ji Hoon Moon ),김현종 ( Hyun Jong Kim ),한명근 ( M. K. Han ),설용건 ( Yong Gun Shul ),김성빈 ( Sung Bin Kim ) 한국공업화학회 2011 응용화학 Vol.15 No.1

Polypyrrole-CNT as supercapacitor was composed with MnO2-CNT for asymmetric hybrid capacitor. To improve the voltage characteristics were used of polypyrrole-CNT, compared to the conventional capacitor was ascertained that the high voltage range. Polypyrrole-CNT composite electrodes formed the peaks by the doping-dedoping for Li-ion.

GDL 표면에 펄스 도금을 통한 PtCo 합금 전극의 제조 및 이를 이용한 연료전지 특성 평가

안지은 ( Ji Eun Ahn ),김현종 ( Hyun Jong Kim ),설용건 ( Yong Gun Shul ),이호년 ( Ho Nyun Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.2

The pulse electro-deposition processes created the PtCo alloy catalysts directly on the surface of gas diffusion layer (GDL). The PtCo alloy catalysts was well dispersed in GDL. By increasing cobalt contents, the size of PtCo alloy catalysts was decreased, result in the enhancement of ESA. Enhanced performance and durability of platinum might be due to the both of structural change and decrease of particle size of platinum.

수계에너지 저장 시스템으로서의 Ppy/CNT 특성화

안지은 ( Ji Eun Ahn ),이지수 ( Ji Soo Lee ),김현종 ( Hyun Jong Kim ),설용건 ( Yong Gun Shul ) 한국공업화학회 2012 응용화학 Vol.16 No.1

Polypyrrole-CNT was composed with MnO2-CNT for aqueous energy storage system. Polypyrrole dispersed on CNT was used as battery type electrode by using doping/ dedoping reaction of Li+ in hybrid capacitor. Ppy/CNT and MnO2/CNT as single cell showed good high performance and cyclic stability in charge/discharge test.

연기 오디션 구조 내에 존재하는 배우의 정체성 연구 - 영상매체 연기 오디션 중심으로

안지은 ( Ahn Ji-eun ) 한양대학교 공연예술연구소 2017 공연예술연구 Vol.5 No.-

본 논문은 작품 속 배역을 선발하기 위해 오디션을 주관한 연출가와 그 오디션에 참여한 배우의 오디션 구조 분석을 통해 오디션에서 존재하는 배우의 ‘주체적인 정체성’을 찾는 것에 목적을 둔다. 캐스팅의 권한이 배우를 선택하는 연출가에게 부여된 오디션에서 과연 배우는 주체적일 수 있는가? 또 배우의 연기를 테스트하기 위해 주어지는 하나의 장면을 통해 배우는 온전한 역할창조를 수행할 수 있는가? 마지막으로 이러한 오디션 구조 안에 존재하는 배우의 정체성은 무엇인가? 의 문제 제기에 따라, 주체 간의 상호작용과 소통을 중요시하는 사회적인 커뮤니케이션 이론을 통해 오디션의 구조를 분석한 결과는 다음과 같다. 상호주관성을 적용한 오디션 구조 분석을 통해 연출자와 배우가 배역 캐스팅이라는 공동의 목적을 달성하기 위한 공동체로서 각각의 주체로 기능할 수 있다는 것을 알 수 있었다. 또 오디션에서 주어지는 하나의 장면을 재현해야 하는 배우는 문맥에서 분리된 짧은 장면일지라도 배우의 주체적인 해석과 배우 자신이라는 매체를 도구 삼아 역할을 자유롭게 창조할 수 있으며 하나의 작은 작품을 완성할 수 있는 창조적 예술가로서의 배우의 존재를 확인할 수 있었다. 마지막으로 오디션을 통한 배우의 정체성은 배우가 지닌 개성과 외모의 가치를 인정받는 것에서 출발해 배우의 내면을 통해 도출되는 외면적 특성 즉 육체와 정신이 분리되지 않은 배우의 모습에서 배우의 주체적인 정체성을 찾아볼 수 있었다. 본 연구자는 오디션이라는 구조적 특수성과 사회 커뮤니케이션의 이론적 고찰을 접촉하는 과정을 통해 오디션에서 존재하는 배우의 주체적인 정체성을 담보하는 구체적인 탐구와 해석 자료를 제안하며 배우의 등용문으로 상징되는 오디션이 배우의 잠재적 능력을 발휘하는 장(場)으로 건강하게 기능하기를 기대해본다. This study examines the “independent identities” of actors exist in an audition by analyzing the actors themselves, the auditionees, the directors who cast the actor and the structure of audition. For acting auditions, directors have the authority to select actors. Under these circumstances, can actors truly be independent? Moreover, can they create an authentic role with an only scene which is given to testify an actor’s talent? Lastly, what is the identity of an actor who exists within this audition system? Considering these questions, this analysis addresses the structure of auditions based on social communication theory emphasizing interaction and communication. The structure of auditions after giving full consideration to inter-subjectivity was analyzed. Each director and actor works independently to achieve the same goal: casting characters. Also, the auditioning actor performs a scene designated by the audition can create a character freely with an his/her own independent interpretation of the scene and himself/herself as a medium, even though the given scene is short and separated from script. Then, he/she could be existed as an identified creative artist who can complete a short play. Lastly, actors’ independent identity is not achieved only based on appearance and individuality but also each person’s presence―in other words, united one’s full body and the soul. This study completes a detailed exploration of data showing the independent identities of actors within the audition system by considering the structural characteristics of audition and applying social communication theory, and expects audition, the gateway to an acting debut, should represent an opportunity for an actor to demonstrate his/her talent.

개인차, 피드백 유형 및 규칙 복잡성 간의 상호작용이 한국어 학습자의 제2언어습득에 미치는 효과 연구

이은하 ( Eun Ha Lee ),안지은 ( Ji Eun Ahn ),김영규 ( Young Kyu Kim ) 이중언어학회 2014 이중언어학 Vol.54 No.-

This study investigated the effects of three-way interactions among individual differences (i.e., language aptitude and working memory capacity), feedback type (i.e., explicit vs. implicit), and rule complexity (i.e., simple vs. complex) on the acquisition of Korean by learners of Korean as a second language. The main research findings were as follows: (1) there was a positive effect of working memory on the acquisition of the target structures only when explicit feedback was provided; (2) working memory facilitated the development of explicit knowledge of a simple rule (i.e., Korean honorifics), whereas it did not contribute to the development of explicit knowledge of a complex rule (i.e., Korean morphological causatives); and (3) the type of corrective feedback affected the acquisition of both explicit and implicit knowledge of the target structures, regardless of rule complexity. Limitations of the study and implications for future research were also discussed. (Ewha Womans University .Michigan State University)

한국어 학습자의 인지적,정의적 개인차 요인과 제2언어 성취 간의 관계

이은하 ( Eun Ha Lee ),채윤정 ( Yun Jeong Chae ),안지은 ( Ji Eun Ahn ),김영규 ( Young Kyu Kim ) 이중언어학회 2011 이중언어학 Vol.46 No.-

This paper investigates the relationships of cognitive and affective individual difference variables (i.e., second language [L2] aptitude and L2 learning motivation, respectively) to proficiency and achievement in Korean as a second language (KSL) for Chinese learners of Korean enrolled in a university-affiliated Korean language institute. The data were analyzed by a variety of statistical methods involving correlation multiple regression. The subtest scores of the aptitude test battery showed strong correlation with overall L2 proficiency and achievement in speaking, listening, reading, and vocabulary and grammar, while measures of the attitude/motivation test battery also corre1ated with L2 success in reading and speaking to a certain extent. The present study contributed to an in-depth understanding of factors that influence success in KSL and highlighted utility of the aptitude and attitude/motivation test batteries used in this study for predicting L2 success of learners of Korean. Implications for further research and limitations of the present study were also discussed.

회피 기능을 가진 장애물 극복 추종 주행 로봇

김성은 ( Sung-eun Kim ),안지은 ( Ji-eun Ahn ),박서현 ( Seo-hyun Park ),전다예 ( Da-yea Jeon ) 한국정보처리학회 2023 한국정보처리학회 학술대회논문집 Vol.30 No.2

본 논문에서는 고르지 않은 도로에서 사용자를 인식하고 따라다니며, 적재물을 안정적으로 운반하는 로봇을 제안합니다. 기존의 바퀴 구동 방식은 계단이나 울퉁불퉁한 지형에 부딪혔을 때 주행이 제한적입니다. 이를 해결하기 위해 저희는 로커-보기(rocker-bogie) 메커니즘을 적용했습니다. 비전을 통해 사용자를 특정하고, 크기에 따라 속도를 조절하며 추종합니다. 라이다는 주변의 장애물을 감지, 회피, 주행하는 데 사용되었으며, 가속도센서와 리니어 모터를 사용하여 밸런싱 기능을 구현했습니다.