Inactivation Kinetics of Listeria innocua ATCC 33090 at Various Temperature Heating-up and Pressure Building-up Rates

안주희,V.M. Balasubramaniam 한국식품과학회 2007 Food Science and Biotechnology Vol.16 No.2

The effects of temperature heating-up rate and pressure building~up phase on the inactivation of Listeria innocua ATCC 33090 were evaluated in buffered peptone water. The number of 1. znnocua was reduced by 5.57 and 6.52 log CFUI mL during the nonisothermal treatment (the come-up time followed by isothermal process) and i?e Isothermal treatme~t, res ectivel at 60°C. When compared to the isothermal treatment (0.76<D value<0.9?), 1. znn~cua. exposed at t e no~sothe~al treatment (1.58<D value<2.31) became more resistant to heat. The come-up tune r~ductIons m numbers of 1. innocua significantly increased with increasing the heating rates (p<0.05). The pronounced ~eductI?n was observed by more than 5 log CFU/mL at 33.2°C/min of temperature heat!ng-~ate. T.he effect of the combmed high pressure and thermal processing on the inactivation of 1. innocua increased WIth mcreas~g pressure and temperature. ~t all temperature levels from 40 to 60°C under 700 MPa,1. innocua was not detected by ennchment culture (>7 log reduction).

초등과학영재 담당교사의 과학영재수업과일반과학수업에서의 교수유형 분석

안주희,여상인 한국과학영재교육학회 2017 과학영재교육 Vol.9 No.1

The purpose of this study was to compare the teaching styles of elementary science-gifted education teachers in science classes for gifted and non-gifted students. The study also aimed to examine differences in their teaching styles according to their personal variables. For this study, questionnaire was revised the diagnostic tool for teaching styles by Grasha(1996), and teaching styles were categorized into five ones which were expert, formal authority, personal model, facilitator, and delegator. A survey was conducted to 110 elementary science-gifted education teachers for gifted students, and collected data were analyzed with a statistical program. The results of this study were as follows: Elementary teachers for gifted students preferred delegator style (58.2%) in science classes for the gifted, not expert style (2.7%) and formal authority style (5.5%). Meanwhile, they preferred personal model style (40.9%) and expert style (39.1%), not delegator style (7.3). Their teaching styles were not related to their personal variables(gender, career as teachers for gifted students, and academic career) and similar to above results. Those findings indicate that elementary school teachers for gifted students mainly gave teacher-led lessons in regular science classes and student-based lessons in science classes for the gifted. 본 연구에서는 영재교육기관에서 과학영재수업을 담당하고 있는 초등과학영재 담당교사의 과학영재수업과일반과학수업에서의 교수유형을 비교하고, 개인 변인에 따른 교수유형의 차이를 알아보았다. 검사 도구는 Grasha (1996)의 교수유형 진단도구를 수정·보완하여 사용하였으며, 본 연구에서 사용한 진단도구의 교수유형은 전문가, 엄격한 교수자, 역할 모델, 촉진자, 위임자라는 5개 유형으로 나누어져 있다. 자료 수집을 위해 110명의 초등과학영재 담당교사를 대상으로 설문을 실시하였으며, 수집된 자료를 분석한 결과는 다음과 같다. 과학영재수업에서는 위임자(58.2%) 교수유형이 많고, 전문가(2.7%)와 엄격한 교수자(5.5%) 교수유형이 적었으며, 일반과학수업에서는 역할 모델(40.9%)과 전문가(39.1%) 교수유형이 많고, 위임자(7.3%) 교수유형이 적은 것으로 나타났다. 이러한 결과는 영재교사의 배경변인인 성별, 영재교사경력, 최종학력과는 관련이 없이 같은 결과가 나타났다. 연구 결과를 토대로 초등과학영재 담당교사들은 일반과학수업에서는 교사 주도적인 수업을, 과학영재수업에서는 학습자 중심의 수업을 주로 진행한다는 결론을 얻었다.

후기 근대사회 현대인의 불안과 강박에 대한 탐색 - 대학생을 중심으로

안주희 한국사회조사연구소 2009 사회연구 Vol.10 No.2

이 연구는 후기 근대화라는 문명사적 전환 속에서 새롭게 형성되고 있는 불안과 강박에 대해 탐색한다. 특히, 후기 근대로의 변화가 청년 세대의 불안을 어떻게 변화시키고 있으며, 새롭게 형성된 유형의 불안이 강박징후라는 특정 행동으로 어떻게 연결되는가에 주목하고자 한다. 다음과 같은 연구문제를 설정했다. 첫째, 후기 근대사회로의 변화에 대한 인식은 청년 세대의 불안에 어떠한 영향을 미치는가. 둘째, 불안이 강박적 징후에 미치는 영향은 어떠한가. 셋째, 불안에 영향을 미치는 후기 근대사회에 대한 인식뿐만 아니라 신뢰, 연구대상의 특정 요소가 불안을 매개로 강박적 징후에 어떠한 영향을 미치는가를 탐색하는 것이다. 이를 위해 대학생 431명을 대상으로 후기 근대에 대한 인식 및 신뢰, 불안감, 강박징후를 묻는 설문조사를 했다. 분석 결과를 요약하면 다음과 같다. 우선, 후기 근대에 대한 인식의 경우, 대학생들은 자신의 삶에서도 후기 근대로의 변화가 나타난다고 여겼으며, 연령이 낮아질수록 이에 대한 동의의 정도가 높았다. 둘째, 불안감 형성의 경우, 사회불안의 수준이 실존불안의 수준보다 전반적으로 높았지만, 실존불안의 경우 응답자들의 편차가 큰 것으로 나타났다. 마지막으로 연구문제로 설정된 주요 변수들 간의 관계를 정리해보면, 후기 근대인식의 정도가 높을수록 그리고 신뢰가 낮을수록, 불안감과 강박징후의 정도가 증가하는 것으로 나타났다. 또한 강박징후에 대한 불안감의 매개효과를 보면, 후기 근대에 대한 인식과 신뢰는 불안을 매개로 하여 강박징후에 영향을 미치는 것으로 나타났다.

Size engineering of perfluorinated sulfonic acid ionomers via supercritical dispersion and its application for fuel cells and water electrolysis

안주희,임준현,박인기,이창현 한국공업화학회 2021 한국공업화학회 연구논문 초록집 Vol.2021 No.0

환경위해성 평가를 위한 Alstroemeria의 생물학적 특성평가 방법

안주희 全南大學校 農業科學技術硏究所 2016 農業科學技術硏究 Vol.52 No.-

This study was conducted to suggest the evaluation standard of biological characteristics for the environmental risk assessment. To assess the environmental risk, four biological factors of Alstroemeria including phenotype indicator comparison of the ornamental traits in the isolated green house, winger hardiness and reproductivity in the isolated field, and phenotype stability of progeny produced by asexual reproduction were evaluated. Furthermore, optimal number of the tested subjects needed for the substantial equivalence assessment was to be suggested. From the phenotype indicator comparison of the ornamental traits analysis stem diameter, leaf length, leaf width, inflorescence length, and peduncle length were found to be biffer or thicker in the green house than in the open field. To evaluate reproductivity in open field rhizome of Alstroemeria was counted, and it differed from 7.7 to 10.2 based on the lines. Winter hardiness was tested using different depth of 10, 20, 40cm, and the results ranged from 10 to 75% according to the lines. Six quantitative characteristics were evaluated for phenotype stability evaluation of progeny produced by asexual reproduction and the results showed no difference except for the anthocyanin level in the ovary with anthocyanin in ‘Cnalshope’(Resigtration No. 5192) while none in Finess. From using 96 Alstroemeria plants cultivated in the Chonnam University by standard cultivation, optimal test subject number needed for the substantial equivalence assessment was found to be more than 5 to 66. In GM crops advance Bio-Technology is applied and unlike traditionally bred varieties, safety assessment including substantial equivalence assessment is required. If substantial equivalence results show big difference, GM crop is not approved for the practical use. For commercialization of GM crops, field assessment is essential and suggesting optimal assessed subject number seems important.

수소 차단성이 향상된 과불소계 술폰산 이오노머-테플론 강화복합막

안주희,임윤재,이창현 한국막학회 2018 한국막학회 총회 및 학술발표회 Vol.2018 No.11

Perfluorinated sulfonic acid (PFSA) ionomers have been used as polymer electrolyte membrane (PEM) materials owing to their excellent chemical durability and proton conductivity. However, the PFSA ionomers are suffering from fast hydrogen crossover and, thereby, chemical degradation in the membrane state. To solve these issues is to make reinforced membranes by filling proton-conductive PFSA ionomers in the pores of chemically robust poly(tetrafluoroethylene) (PTFE) support films. However, it is very difficult to obtain PFSA-PTFE reinforced membranes with improved hydrogen barrier property. In this study, PFSA-PTFE reinforced membranes were fabricated by immersing commercial reinforced membrane in PFSA ionomer dispersions with different chemical architectures and particle sizes and their effects were systematically investigated.

술폰화 탄화수소 고분자-PTFE 강화복합막 제조 전략

안주희,이시찬,오은택,이창현 한국막학회 2025 한국막학회 학술발표회 Vol.2025 No.10

과불소계 이오노머의 초임계 나노분산 기술과 응용

안주희,임준현,이시찬,황경환,이혁주,주진호,오은태,이창현 한국막학회 2025 한국막학회 학술발표회 Vol.2025 No.10

초등학생의 뮤지컬 활동 경험이 표현 활동 목표 인식에 미치는 영향

안주희,김정자 한국교원대학교 학교체육연구소 2001 학교체육연구소지 Vol.8 No.1

함침막 제조를 위한 술폰화 폴리아릴렌에테르술폰 공중합체-폴리에틸렌글리콜 소중합체 블랜드

안주희,이창현 한국막학회 2015 한국막학회 총회 및 학술발표회 Vol.2015 No.11

Sulfonated poly(arylene ether sulfone) (SPAES) random copolymers have been perceived as alternatives to perfluorinated sulfonic acid ionomers used as polymer electrolyte membranes for fuel cells. SPAES copolymers are suffering from degradation under harsh fuel cell operation conditions. One solution to overcome the decomposition issue is to fill SPAES copolymers into polymeric support films (e.g., poly(tetrafluoro ethylene), PTFE) with interconnected porous structures. It is difficult to fill the SPAES copolymers dissolved in polar aprotic solvents into PTFE support films owing to their different surface energies. In this study, a SPAES nanodispersion in a water-alcohol mixture is used to make defect-free pore-filling membranes where poly(ethylene glycol) oligomers are added to induce advanced morphologies for fast proton conduction.