폴리스티렌 라텍스 제조에 있어서 Triton X-100/SDS 계면활성제 혼합이 단량체/수용액 간의 계면물성 및 라텍스의 특성에 미치는 영향

박아름이(A Reum Yi Park),김영호(Young Ho Kim) 한국유화학회 2009 한국응용과학기술학회지 Vol.27 No.3

The blending effects of surfactants on the polystyrene emulsion polymerization were studied. The blending of Triton X-100 and SDS affects to the interfacial properties of the styrene monomer and water phases, and finally, the properties of the polystyrene latex particles. As the blending ratio of SDS/Triton X-100 increases, the interfacial tension and CMC of the blended surfactants were decreased and results in a reducing the size of the latex particles. It was found that the interfacial tension was reduced when the surfactant were blended. By increasing the SDS content, the interfacial tension was reduced, and, at a certain condition, the interfacial tension was reached to an extremely low value to form micro-emulsion and the nano-sized latex particles (80∼110 nm).

졸겔법에 의한 DSSC 광전극의 전기화학적 특성

박아름,구할본,Park, A-Reum,Jin, En Mei,Gu, Hal-Bon 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.4

In general, a photoelectrode in DSSC(dye sensitized solar cell) are fabricated by using the $TiO_2$ (Titanium dioxide) to realize high efficiency and the efficiency of DSSC is affected by the size, the shape and the property of $TiO_2$. We synthesized the crystalline $TiO_2$ by sol-gel method. In spite of many merits, only weakness for the sol-gel method is taking many process times. To solve this problem, we reduced the fabricating processes. The reduced process is the making process that is $TiO_2$ sol to $TiO_2$ powder with including of two heat treatment and two mixing. We could simplify the process by preparing $TiO_2$ sol to $TiO_2$ paste directly. As a result, DSSC fabrication process is simplified and we have obtained the efficiency best result 3.88% with $V_{OC}$=0.71 V, $J_{SC}=8.70\;mA/cm^{-2}$, and FF=62.37%, respectively.

폴리스티렌 라텍스 제조에 있어서 Triton X-100/SDS 계면활성제 혼합이 단량체/수용액 간의 계면물성 및 라텍스의 특성에 미치는 영향

박아름이 ( A Reum Yi Park ),김영호 ( Young Ho Kim ) 한국유화학회 2010 한국응용과학기술학회지 Vol.27 No.3

Paenibacillus kimchicus sp. nov., an antimicrobial bacterium isolated from Kimchi

박아름,오지성,노동현,Park, A-rum,Oh, Ji-Sung,Roh, Dong-Hyun The Microbiological Society of Korea 2016 미생물학회지 Vol.52 No.3

병원성 미생물들에 대해 항균활성을 보이는 $W5-1^T$ 균주가 한국의 발효식품인 김치에서 분리되었다. 이 분리주는 그람염색변이성, 절대호기성, 간균, 내생포자형성과 주모성의 편모를 가지고 운동성을 나타내었다. 균주는 $15-40^{\circ}C$, pH 6.0-10.0, 0-4% NaCl 조건에서 생육하였다. 균주는 esculin과 xylan을 가수분해하였고, $\small{D}$-mannose을 동화하였으나 $\small{D}$-mannitol은 동화하지 못하였다. $W5-1^T$ 균주는 Listeria monocytogens, Pseudomonas aeruginosa, Staphylococcus aureus, Salmonella typhi에 항균활성을 보였다. $W5-1^T$ 균주의 DNA의 G+C 함량은 52.6 mol%였다. 주요 호흡성 퀴논은 menaquinone-7 (MK-7)였고, 주요 세포성 지방산은 $C_{16:0}$, antieiso-$C_{15:0}$, $C_{18:0}$, and $C_{12:0}$였다. 균주는 세포벽 펩티도클리칸으로 meso-diaminopimelic acid을 함유하였다. 16S rRNA 유전자서열 분석에 근거하여 $W5-1^T$ 균주는 Paenibacillaceae 과로 분류되었으며 Paenibacillus pinihumi $S23^T$(98.4% similarity), P. tarimensis $SA-7-6^T$(96.4%) 균주와 높은 연관성을 보였다. 분리주와 P. pinihumi $S23^T$는 8.5%의 DNA-DNA 관련성을 보임으로 $W5-1^T$ 균주가 Paenibacillus 속의 한 종임을 보여주었다. 이러한 다각적 연구의 증거로 볼 때 $W5-1^T$ 균주는 Paenibacillus 속의 신종으로 사료되어 Paenibacillus kimchicus로 명명을 제안하며, 표준균주는 $W5-1^T$(=KACC $15046^T$=LMG $25970^T$)이다. An antimicrobial bacterium to pathogenic microorganisms, strain $W5-1^T$ was isolated from Korean fermented-food Kimchi. The isolate was Gram-staining-variable, strictly aerobic, rod-shaped, endospore-forming, and motile with peritrichous flagella. It grew at $15-40^{\circ}C$, at pH 6.0-10.0, and in the presence of 0-4% NaCl. Strain $W5-1^T$ could hydrolyze esculin and xylan, and assimilate $\small{D}$-mannose, but not $\small{D}$-mannitol. Strain $W5-1^T$ showed antimicrobial activity against Listeria monocytogens, Pseudomonas aeruginosa, Staphylococcus aureus, and Salmonella typhi. The G+C content of the DNA of strains $W5-1^T$ was 52.6 mol%. The predominant respiratory quinone was menaquinone-7 (MK-7) and the major cellular fatty acids were $C_{16:0}$, antieiso-$C_{15:0}$, $C_{18:0}$, and $C_{12:0}$. The strain contained meso-diaminopimelic acid in cell-wall peptidoglycan. On the basis of 16S rRNA gene sequence and phylogenetic analysis, the strain W5-1 was shown to belong to the family Paenibacillaceae and was most closely related to Paenibacillus pinihumi $S23^T$ (98.4% similarity) and Paenibacillus tarimensis $SA-7-6^T$ (96.4%). The DNA-DNA relatedness between the isolate and Paenibacillus pinihumi $S23^T$ was 8.5%, indicating that strain $W5-1^T$ represented a species in the genus Paenibacillus. On the basis of the evidence from this polyphasic study, it is proposed that strain $W5-1^T$ is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus kimchicus sp. nov. is proposed. The type strain is $W5-1^T$ (=KACC $15046^T$ = $LMG 25970^T$).

CO₂/CH₄ 분리를 위한 프로필렌카보네이트/물 흡수제 특성 평가 및 막접촉기의 적용

박아름이,김성중,이평수,남승은,박유인,Park, Ahrumi,Kim, Seong-Joong,Lee, Pyung Soo,Nam, Seung Eun,Park, You In 한국막학회 2016 멤브레인 Vol.26 No.2

바이오 가스로부터 바이오 메탄을 생산하기 위해 물리흡수제 특성평가 및 $CO_2/CH_4$흡수 연구를 진행하였고, poly-propylene(PP) 중공사막 막접촉기에 적용해보았다. 물리흡수제 중 propylene carbonate (PC)는 PP 중공사막과 가장 높은 $58.3^{\circ}$ 접촉각을 보였고, 5 wt% PC를 물과 혼합할 경우 $90^{\circ}$ 이상의 접촉각이 관찰되었다. 또한 $CO_2$ 흡수실험에서 PC/물 혼합 흡수제는 물 흡수량(0.121 mmol/g) 보다 높은 0.148-0.157 mmol/g의 흡수량을 보이며, 막접촉기에 가장 적합한 물리흡수제로 선정되었다. PC/물 혼합 흡수제를 막접촉기에 적용 후 얻어진 $CO_2$ 제거율(98.0-97.8%)과 $CH_4$ 순도(98.5-98.3%)는 바이오 메탄으로서 매우 높은 가능성을 보여주었다. 하지만 PC/물 혼합 흡수제의 경우에는 물 흡수제와 비교하여 성능 변화가 매우 미비하였다. 이는 물보다 우수한 PC 흡수능과 함께 그에 따른 막접촉기 탈기 막 모듈 및 시스템 개선과 공급 유량 조절을 통해 $CH_4$ 손실 최소화 등 공정 최적화가 필요한 것으로 분석된다. To produce renewable biomethane from biogas, the properties of physical absorbents such as water, methanol, 1-methyl-2-pyrrolidone (NMP), poly(ethylene glycol) dimethylether (PEGDME), and propylene carbonate (PC) were studied, and PC was applied to membrane contactor systems. Among physical absorbents, PC exhibited a high contact angle of $58.3^{\circ}$ on polypropylene surface, and a PC/water mixture (5 wt%) increased the contact angle to $90^{\circ}$. Furthermore, the PC/water mixture presented higher $CO_2$ absorption capacities (0.148-0.157 mmol/g) than that of water (0.121 mmol/g), demonstrating a good property as an absorbent for membrane contactors. Actual operations in membrane contactors using the PC/water mixture resulted in $CO_2$ removal of 98.0-97.8% with biomethane purities of 98.5-98.3%, presenting a strong potential for biogas treatment. However, the PC/water mixture yielded moderate improved in $CO_2$ removal and methane recovery, as compared with water in the membrane contactor operation. This is originated from insufficient desorption processes to reuse absorbent and low $CO_2$ flux of the PC/water absorbent. Thus, it is requiring optimizations of membrane contactor technology including development of absorbent and improvement of operation process.

Na-Y 제올라이트가 첨가된 PVA/PAA 분리막의 아세트산 수용액에서 투과 증발 연구

권용성 ( Yongsung Kwon ),( Shivshankar Chaudhari ),문명준 ( Myungjun Moon ),손민영 ( Minyoung Shon ),박아름이 ( Ahrumi Park ),김영미 ( Youngmi Kim ) 한국화학공학회 2017 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.55 No.6

Membranes were prepared by incorporating Na-Y zeolite particles into poly(vinyl alcohol) (PVA) cross-linked with poly(acrylic acid) (PAA). The membrane was characterized by FT-IR spectroscopy, contact angle measurement, swelling test, SEM analysis, and XRD analysis. The pervaporation separation of water/acetic acid mixtures was carried out using prepared membranes. From the results, it was shown that the hydrophilic property of prepared membrane increased with increase of zeolite contents and the PVA/PAA membrane with zeolite addition showed higher permeation flux than that of without zeolite membrane. The PVA/PAA membrane containing 8 wt% zeolite showed the highest perme-ation flux and separation in the feed solution containing 10 wt% acetic acid.

아웅산 사건의 발생과 영향: 1980년대 초 북한과 동북아 정세

박아름 ( Ah Reum Park ) 조선대학교 동북아연구소(구 통일문제연구소) 2014 동북아연구 Vol.29 No.2

본 논문은 아웅산 사건의 전말과, 발생원인, 그 당시의 동북아 정세, 그리고 실제 북한이 받은 영향에 대해 분석하였다. 아웅산 사건에 대한 기존 추론 중 북한이 전두환 정권을 배제하고자 한 의도가 가장 타당한 원인으로 분석되었다. 1981~1985년 시기, 동북아의 양자간, 다자간, 진영간의 모습을 면밀히 살펴 본 결과 화해와 평화를 지향하는 큰 흐름을 보였다. 따라서 1980년대 초반 북한이 처한고립적인 동북아 정세로 아웅산 사건 발생의 필연성을 주장하는 것은 다소 무리가 따른다. 마지막으로 아웅산 사건 이후 북한의 대외관계와 경제적인 부분에서 변화를 찾기 어려웠으며, 국방부분의 변화는 오히려 북한에게 유리하게 전개되었음을 확인하였다. 따라서 아웅산 사건으로 북한이 남북한의 체제경쟁에서 뒤처지게 되었다는 평가는 적절하지 못하다. 연구결과 아웅산 사건에 대한 기존의 평가들이 다소 수정되어야 함을 발견하였으며, 1980년대 초반 역동적인 동북아 정세를 구체적으로 이해할 수 있게 되었다. The terrorist explosion at Aung San Cemetery in Myanmar, which occurred on October 9, 1983, reflected the divided Korean peninsula in the Cold War. In this paper, the content of Aung San events, causes, and the situation at the time in Northeast Asia, and the actual impact of North Korea was analyzed. The most relevant analysis suggested that the cause of the Aung San event was the elimination by North Korea of the Chun Doo-hwan regime. The 1981-1985 period in the Northeast showed a large flow of reconciliation and peace. Therefore evaluation of the Aung San event as an inevitable event is not appropriate. After the Aung San event, it is difficult to find evidence that North Korean foreign relations and foreign trade, had any benefit from the military part of North Korea. The Aung San case as a case study suggests that existing understanding should be slightly modified to show that in the early 1980s, specifically to the dynamic situation in Northeast Asia, further understanding has been achieved.

1980년대 냉전의 균열과 북한의 대응: ‘우리 식 사회주의’의 출현과 함의

박아름 ( Ah Reum Park ) 조선대학교 동북아연구소 2021 동북아연구 Vol.36 No.1

본 연구는 1980년대 냉전의 해체가 얼마 남지 않은 상황에서 북한이 와해되고 있는 사회주의 진영과의 연대를 회복하기 위해 노력한 정황을 주목하고, 그 양상과 함의를 고찰하고자 『대한민국 외교사료해제집』과 『조선중앙년감』을 중심으로 문헌분석을 시도하였다. 결과 첫째, 비동맹 운동에 주력했던 북한이 불리한 국제정세와 남북한 경쟁의 한계를 인식하고 사회주의 진영과의 연대를 회복하고자 노력한 양상을 확인하였다. 둘째, 외교관계 변화와 민족에 대한 재정의를 통해 국내정치 담론인 ‘우리 식 사회주의’를 완성하는 흐름을 규명하였다. 마지막으로 1980년대 북한의 대외관계 변화를 통해 북한 대외정책의 초점이 남북한 대결에서 김일성-김정일 중심의 체제수호와 내부결속으로 옮겨진 함의를 제안하였다. This study provides a literature analysis centering 『Korean Diplomatic Historical Records Removal Collection』 and 『DPRK Yearbook』, paying attention on the circumstances of Democratic People's Republic of Korea(DPRK) made an effort to recover the solidarity with the collapsing socialist camp at the situation of the breakup of cold war in 1980s. This study, firstly finds that DPRK recognized international situation and the limitation of competition between North and South Korea disadvantageous to DPRK focused on non-alignment movement and made an effort to recover the solidarity with socialist camp. Secondly, this study investigates that DPRK completed ‘Own Style of Socialism’ as a domestic political discourse by the change of diplomatic relations and redefinition for the people. Lastly, this study suggests that DPRK moved the focus of foreign policy by the change of foreign relationship of DPRK in 1980s from confrontation between North and South Korea to system protection and internal unity centering Il-sung Kim and Jung-il Kim.

오르프 슐베르크를 활용한 음악교육 활동이 자폐성 장애학생의 과제수행 및 주의집중 행동에 미치는 효과

박아름 ( A Reum Park ),김진호 ( Jin Ho Kim ) 한국정서.행동장애아교육학회(구.한국정서학습장애아교육학회) 2010 정서ㆍ행동장애연구 Vol.26 No.4

본 연구는 오르프 슐베르크(Orff-Schulwerk)를 활용한 음악교육 활동을 중학교에 재학 중인 자폐성 장애학생에게 적용하여 그들의 과제수행 행동과 주의집중 행동에 미치는 효과를 알아보았다. 음악활동은 감정표현이나 미적경험 등을 통하여 자폐아동들의 행동중재에 사용되고 있는데, 특히 오르프 슐베르크는 내용이 쉽고 상호협조와 우호적인 환경에서 이루어지는 특성 때문에 더욱 폭넓게 사용되고 있다. 본 연구는 경기도에 소재한 H중학교에서 특수학급에 재학 중인 자폐성 장애를 가진 남학생 세 명을 대상자로 선정하였다. 중재의 효과를 알아보기 위하여 대상자간 중다기초선 설계를 사용하였으며, 기초선, 중재, 유지 절차로 진행되었다. 종속변인 측정은 직접관찰을 사용하였으며, 신뢰도 검증을 위하여 관찰자간 신뢰도를 측정하여 제시하였다. 연구결과로서 오르프 슐베르크를 활용한 음악교육프로그램은 세 명의 대상자 모두 음악수업에서 과제수행 행동을 향상시키는데 효과적인 것으로 나타났다. 또한 음악수업 중의 주의집중행동에서도 효과가 있는 것으로 나타났다. 이러한 결과는 자폐성 장애학생의 음악교육 활동프로그램의 관점에서 논의되었다. The purpose of this study was to investigate the effects of the music education program of Orff Schulwerk on the task performance behaviors and attention behaviors of students with autism. Music activities have been utilized in education fields in order to mediate problematic behaviors of autistic children by providing them with opportunities of emotional expression or artistic experience. In particular, the music education program using Orff Schulwerk`s method has been one of the most effective methods in the field of education and music therapies. The participants of the study were three male students with autism who were enrolled in a general classroom of a middle school located in Geonggi-do. They also received special education programs presented in a special education classroom of the school. Direct observation was made both in general education classrooms and a music classroom. The multiple baselines across participants design was used to analyze the effects of the music program of Orff Schulwerk. The single subject research design carried out in the order of baseline, intervention, and follow-up. The results indicated that the music education program of Orff Schulwerk was an effective instruction method in enhancing task performance behaviors and attention behaviors for the three students with autism. Based on the results, music education program was discussed in terms of the best and recommended pe stices in the field of education for students with disabilities.

성인의 일반적 특성과 SNS 정보특성이 반영구화장 전문샵 방문의도에 미치는 영향

박아름(A-Reum Park),이루리(Ru-Ri Lee),김은수(Eun-Soo Kim) 사단법인 대한 문신사 중앙회 2022 한국반영구화장학회지 Vol.3 No.1

This study attempted to analyze the effect of general characteristics of adults and SNS information characteristics on the intention to visit semi-permanent makeup shops. First, the higher the information provision and vitality of semi-permanent.makeup-related SNS, the more it is through SNS. The intention to visit semi-permanent makeup shops is high. Second, it showed a high awareness of the information provision of SNS related to semi-permanent makeup. Third, consumers showed a high perception of the reliability of semi-permanent makeup-related SNS, and consumers who had undergone semi-permanent makeup procedures showed a higher perception of reliability. Fourth, consumers showed a high perception of the interaction of SNS related to semi-permanent makeup, and consumers who had undergone semi-permanent makeup procedures showed a higher perception of the interaction of SNS. Fifth, consumers showed a high perception of the vitality of SNS related to semi-permanent makeup, and consumers who had undergone semi-permanent makeup procedures showed a higher perception of the vitality. Through this study, it is expected that the impact of semi-permanent makeup SNS information characteristics on consumers, attracting customers due to activation of semi-permanent makeup SNS marketing, and contributing to sales.