기업의 사회적 책임(CSR)과 기업성과·경쟁력의 재음미

장영철(Chang, Young-Chul),안치용(Ahn, Chi-Yong) 대한경영학회 2012 大韓經營學會誌 Vol.25 No.9

대청호 수화발생시기의 미생물 다양성 및 계통분류학적 분석

고소라 ( So Ra Ko ),안치용 ( Chi Yong Ahn ),이영기 ( Young Ki Lee ),오희목 ( Hee Mock Oh ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.3

The change of microbial communities during cyanobacterial bloom was comparatively analyzed by 16S rDNA PCR DGGE in Daechung Reservoir during 2003~2005. Morphological analysis showed that Cyanophyceae dominated algal community in the bloom. Dominant cyanobacteria were Microcystis, Planktothrix (Oscillatoria), Phormidium and Anabaena. We used 16S rDNA denaturing gradient gel electrophoresis (DGGE) profiles and phylogenetic affiliations of the DGGE bands to analyze the community structure and diversity of the predominant microbial community. The DGGE band patterns demonstrated that the most frequent bands were identified as Microcystis during the monitoring periods, Planktothrix also dominated on September 2003 and 2004, whereas Anabaena was showed a peak on September 2005 and Aphanizomenon on August 2003. DGGE and phylogenetic analysis provided us new information that could not be obtained by traditional, morphological analysis. The relationship between cyanobacteria and other aquatic bacteria can be traced and their genetic diversity also identified in detail.

과불화 알코올을 이용한 발수성 폴리우레탄 코팅 필름의 제조

김남우 ( Nam Woo Kim ),안치용 ( Chi Young Ahn ),송기창 ( Ki Chang Song ) 한국화학공학회 2016 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.54 No.3

불소가 함유된 폴리우레탄 코팅 용액을 과불화 알코올, toluene diisocyanate와 polycarbonate diol을 출발물질로 사용하여 합성하였다. 이렇게 합성된 불소 함유 폴리우레탄 코팅 용액을 기재인 PC 위에 스핀 코팅 후 120 oC에서 열경화시켜 코팅 필름을 제조하였다. 제조된 코팅 필름의 물성을 FT-IR spectroscopy, UV-visible spectrometer, 접촉각 측정기와 연필경도 측정기를 사용하여 분석하였다. 과불화 알코올의 첨가는 코팅 필름의 발수성을 향상시켜, 물 접촉각을 81o에서 111o로 증가시켰다. 그러나 코팅 필름의 연필경도는 과불화 알코올의 첨가에도 불구하고 H로 일정하였다. Fluorinated polyurethane coating solutions were synthesized from perfluoroalkyl alcohol, toluene diisocyanate, and polycarbonate diol as starting materials. Next, coating films were prepared by spin-coating the fluorinated polyurethane coating solutions on the PC substrates, followed by thermal curing at 120 ℃. The obtained fluorinated polyurethane coating films were characterized by FT-IR spectroscopy, UV-Vis spectrometer, contact angle tester and pencil hardness tester. Contact angle measurements of water on the coating films showed that the addition of perfluoroalkyl alcohol improved the water repellency and increased the contact angle from 81o to 111o. However, the pencil hardness of coating films exhibited a constant grade of H, irrespective of the addition of perfluoroalkyl alcohol.

긍정심리자본이 조직웰빙에 미치는 영향

김진욱(Jin-Wook Kim),장영철(Young-Chul Chang),안치용(Chi-Yong Ahn) 피터드러커 소사이어티 2015 창조와 혁신 Vol.8 No.2

본 연구는 조직웰빙에 대한 연구이다. 조직웰빙과 관련된 연구는 아직 활성화되지 않았지만, 조직성과에 미치는 영향에 대한 기존 연구들과 ‘조직 구성원이 행복하면 성과가 높다’는 연구(Lyubomirsky, 2007)를 바탕으로 심리적으로 강한 조 직, 긍정적인 조직으로 변화시키기 위해 조직구성원의 조직 웰빙에 영향을 주는 요인을 긍정심리자본에서 찾아보고자 하는 연구이다. 분석결과, 긍정심리자본의 자기 효능감과 회복탄력성은 환경 차원의 웰빙과 개인적 차원 웰빙에 고루 영향을 미치는 것으로 나타났다. 하지만 낙관주의는 어느 차원의 웰빙에도 정(+)의 영향을 미치지 못하였다. 따라서 조금은 구체적이지 않을 수 있는 낙관주의적 성향보다는 구체적으로 목표를 설정하고 달성하려는 노력, 그러한 과정에 자신에게 발생하는 긍정적인 자신감, 그리고 어떠한 역경에도 쉽게 흔들리지 않고 평상심을 되찾으려는 노력들이 조직구성원들에게는 행복함을 느끼면서 직장생활을 잘할 수 있는 요인으로, 긍정심리자본의 관점에서 연구하고 검증하였다. This study examines organizational wellbeing. While there is still little research on organizational wellbeing, it identified some of the important influencers that affect organizational wellbeing, a driver to transform an organization into a psychologically strong and positive one, from the notion of positive psychological capital by looking into previous research on the contributing factors affecting organizational performance and Lyumbomirsky’s research(2007) that “the happier that employees are, the better performance they can yield”. The study found that self-efficacy and resilience in positive psychological capital had an impact on both environmental and personal wellbeing, whereas a sense of optimism did not establish a positive link with any of them. It suggests that specific goal setting and the commitment to that goal, having self-confidence and unwavering calmness are the critical determinants, not the unclear optimism, for organizational members to stay happy and have a successful work life.

공유리더십이 종업원 인게이지먼트에 미치는 영향 -회복탄력성의 조절효과를 중심으로

김진욱 ( Jin Wook Kim ),장영철 ( Young Chul Chang ),안치용 ( Chi Yong Ahn ) 한국생산성학회 2013 生産性論集 Vol.27 No.4

This research is to verify whether shared leadership affects on employee engagement and the moderating effects of resilience. Through result of inspection, the shared leadership does affect on employee`s job commitment and organizational commitment. When seen from a practical side, fixating shared leadership at organization(at organizational level) plays an important rollon improving engagement of organizational members on account of diffusion & exhibition of shared leadership which affects strong positive correlation on the employee engagement. And also the moderating effect of resilience appeared between the transactional shared leadership and job commitment, transactional & delegating shared leadership was from organizational commitment. Transactional shared leadership is related with a fair evaluation, delegating shared leadership is related with adequate compensation; so that the resilience is needed when the problem occurred from those two factors.

Microcystin을 분해하는 신균주 Microbacterium sp. MA21

고소라 ( So Ra Ko ),이영기 ( Young Ki Lee ),오희목 ( Hee Mock Oh ),안치용 ( Chi Yong Ahn ) 한국환경생물학회 2013 환경생물 : 환경생물학회지 Vol.31 No.2

환경시료에서 마이크로시스틴 분해능을 나타낸 균주1종을 분리하였고 16S rRNA gene sequence 분석 결과, Microbacterium sp.로 동정되어 Microbacterium sp. MA21로 명명하였다. R2A배지를 기본 배지로 하여 50 μg L-1 microcystin-LR을 첨가하여 30°C, 12시간 동안 배양한후 PPIA를 통해 microcystin이 80% 이상 분해되는 것을 확인하였다. Microcystin-LR의 분해를 HPLC 분석을 통해 재확인하였고, microcystin 분해산물로 추정되는 두 개의 peak를 확인하였다. 16S rRNA 염기서열을 이용한 계통분류 분석 결과, 본 연구에서 분리한 Microbacterium sp. MA21은 Alphaproteobacteria의 Sphingomonas 속에 속하지 않는 것은 물론 Actinobacteria에는 속하지만 기존에 보고되지 않은, 새로운 genus로 확인되었다. A microcystin-degrading bacterium was isolated from Daechung reservoir, Korea. The isolated bacterium was identified as Microbacterium sp. by 16S rRNA gene sequence analysis, and designated as Microbacterium sp. MA21. This strain degraded cyanobacterial hepatotoxin, microcystin- LR, over 80% when incubated at 30°C for 12 hr in R2A medium. Two unknown metabolites of microcystin were also identified during the degradation process. Although only Sphinogomonas and Actinobacteria have been known to degrade microcystin previously, this is the first report that Microbacterium sp. MA21 could degrade microcystin.

DGGE를 이용한 PCE 및 TCE의 혐기적 탈염소화 군집의 미생물 군집분석

윤병대 ( Byung Dae Yoon ),조대현 ( Dae Hyun Cho ),고성철 ( Sung Cheol Koh ),김희식 ( Hee Sik Kim ),오희목 ( Hee Mock Oh ),김병혁 ( Byung Hyuk Kim ),성열붕 ( Youl Boong Sung ),안치용 ( Chi Young Ahn ) 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 2010 한국미생물·생명공학회지 Vol.38 No.4

광양, 하남, 여천지역의 토양, 하천 및 해양 퇴적물 등을 이용하여, 난분해성 염소화합물인 PCE (perchloroethylene) 및 TCE(trichloroethylene)의 혐기성 탈염소화에 관련하는 미생물을 탐색하고 이들의 탈염소화 효율을 조사하였다. 혐기성 상호대사에 의한 탈염소화 효율을 조사하기위해 전자 공여체로 아세테이트를 사용하여 혐기성 회분식 실험을 실시하였으며, 미생물 군집을 분석하기 위해, 분자생물학적인 기법인 16S rDNA의 DGGE 기법을 이용하였다. 그 결과, 4주간 집적배양을 통해 광양, 하남, 여천시료는 PCE와 TCE를 PCE 75% 이상, TCE 81% 이상 탈염소화하는 것으로 나타내며, 여천시료가 우수한 PCE/TCE탈염소화율을 보이고 있다(PCE 87.37%, TCE 84.46%). 또한, 전자 수용체에 따른 탈염소화 배양액의 미생물 다양성은 DGGE로 분석하였으며, 우점하는 미생물은 Clostridium sp., Desulfotomaculum sp.와 unculutured bacteria로 나타났다. This study investigated the effect of PCE and TCE as electron The enrichment cultures reductively dechlorinating PCE and TCE were developed from three environment samples using acetate as electron donor. The cultures were prepared by sequential enrichment, which was seeded with sediment and dredged soil. Denatured gradient gel electrophresis (DGGE) of 16S rRNA gene fragment was used to compare the microbial communities of these three enrichment cultures. After incubation for 4 weeks, the removal efficiencies of PCE and TCE were highest from Yeocheon site (87.37% and 84.46%, respectively). PCE and TCE as electron acceptors affected the bacterial diversity and community profiles in the enrichment cultures. DGGE analysis showed that the dominant bacteria in PCE and TCE enrichment were belonged to Clostridium sp., Desulfotomaculum sp., and uncultured bacteria.