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Shin, Seung Gu,Koo, Taewoan,Lee, Joonyeob,Han, Gyuseong,Cho, Kyungjin,Kim, Woong,Hwang, Seokhwan Elsevier 2016 Bioresource technology Vol.214 No.-
<P><B>Abstract</B></P> <P>Process parameters and bacterial populations were investigated in four full-scale anaerobic digesters treating sewage sludge. Although the four digesters were operated under similar conditions, digesters A and B had higher pH (7.2–7.4) and lipid removal efficiencies (>50%) than C and D (pH 6.1–6.4; average lipid removal <16%). Bacterial richness, diversity, and evenness were higher in digesters C and D. Among the top-populated genera, ten (group I) were more abundant in digesters A and/or B; they were putative syntrophic fatty acid or protein/amino acid-utilizers. In contrast, fifteen others (group II) were less abundant in A and/or B and included potentially dormant/dead cells originated from activated sludge. Despite the overall richness trend, the presence of the 25 genera in groups I/II was greater in digesters A and B (24) than in C and D (17); this observation suggests that group I bacteria might be essential in AD of sewage sludge.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Protein and lipid removals were positively intercorrelated while carbohydrate wasn’t. </LI> <LI> Bacterial diversity and evenness were lower in digesters with better performance. </LI> <LI> “Richness” of major bacterial genera was higher in digesters with better performance. </LI> <LI> Poor-performance digesters almost lacked fatty acid and protein-utilizing syntrophs. </LI> <LI> Putatively WAS-borne bacteria were more abundant in digesters with poor performance. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
KyungJin Lee,HyeRyung Jung,JooYoun Cho,HyeYoon Park,DoHyung Kang,InJin Jang,SangGoo Shin,JunSoo Kwon 대한신경정신의학회 2007 PSYCHIATRY INVESTIGATION Vol.4 No.1
Serotonin dysfunction has been implicated in the pathogenesis of obsessive compulsive disorder (OCD). Neurocognitive dysfunction is considered as the core pathology in the OCD. This study aimed to investigate the association of T102C polymorphism of the 5-HT2A receptor gene with the neurocognitive function in OCD. Fifty four patients with OCD were participated in this study. Neurocognitive function tests were administered to the patients with OCD. T102C of the 5-HT2A gene were analyzed by Polymerase Chain Reaction (PCR) amplification and Restriction Fragment Length Polymorphism (RFLP). The distribution of genotypic patterns of T102C was grouped into T/T genotype (n=16), T/C genotype (n=28) and T/T genotype (n=10). The group of patients with T/T genotype demonstrated significant delayed response time in immediate recall (p=0.036) and delayed recall (p=0.038) of Rey-Osterrieth Complex Figure test which was used to evaluate visuospatial construction ability and visuospatial memory. These results showed that T/T genotype of T102C has higher performance deficit in neurocognitive function tests such as RCFT than the other types. We suggest that T102C genotype may contribute to neurocognitive function and neurocognitive function may serve as a good candidate phenotype for association or linkage studies on OCD.
곽경진 ( Kyungjin Kwak ),김현지 ( Hyeonji Kim ),김성우 ( Sungwoo Kim ),이소연 ( Soyoun Lee ),신길호 ( Gilho Shin ),이진우 ( Jinwoo Lee ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0
안전한 먹거리에 대한 관심이 증가하면서 지속가능한 농업기술 개발의 요구 또한 증가하고 있지만 유기농 원예작물은 고투입 일반 관행 대비 생산성이 낮은 상황이다. 마늘(Allium sativa L.)은 무성번식하며 백합과 파속에 속하는 우리나라 대표 원예작물 중 하나지만 유기농 마늘의 안정적인 재배 공급에 어려움이 있다. 이에 본 연구는 퇴비 및 유기자재를 활용한 양분관리가 유기농 마늘의 생육과 수량에 미치는 영향을 구명하고자 수행하였다. 전남의 주요 재배 품종인 남도마늘을 대상으로 3년간 수행하였으며 유기자재로 계분 분상형의 가축분퇴비와 그레뉼형인 유기질비료를 이용하였다. 퇴비와 유기질비료는 마늘 표준시비량 질소 기준(25 kg/10a)으로 각 처리별 해당량을 토양검정 질소시비량에 퇴비 무기화율 70%를 적용하여 투입량을 결정하였으며, 정식 3~4주 전 살포 후 경운하였다. 추비는 유기질비료를 이용하였으며 비료의 토양 내 무기화 및 작물생육시기를 고려하여 2월, 3월, 4월로 하여 적정 추비시기를 알아보고자 하였다. 시비처리 방법에 따른 토양화학성 조사결과 질산태질소, 토양 EC 모두 유기질전량 처리구에서 생육기간 동안 높게 유지되었으며, 추비 처리에 의한 토양 양분함량변화는 처리 1개월 이후 유효화되는 경향을 보였다. 마늘 생육상황 조사결과 퇴비(기비)+2월 추비 처리에서 초장이 연차별로 88.3 cm, 77.1 cm, 69.8 cm로 가장 높은 경향을 나타났다. 시비처리별 마늘 수량은 1년차 시험은 유기질비료 전량처리와 기비(퇴비)+추비(유기NK, 2월시비) 처리에서 가장 높았으며, 2년차에는 기비(퇴비)+추비(유기NK, 2월시비) 처리에서 높게 나타났으며, 3년차에는 퇴비전량 처리구에서 높게 나타났으나 전반적으로 수량이 비슷하였다. 유기자재를 활용한 양분관리는 여러 해에 걸쳐 지속적으로 유기물 공급 뿐 아니라 양분유실 방지와 생물다양성을 증가시키는 등의 노력을 했을 때 효과를 기대할 수 있으므로 꾸준한 연구가 필요하다.
오경진(Kyungjin Oh),이나영(Nayoung Lee),정대권(Daekwon Chung),우진호(Jinho Woo),신혜연(Haeyeon Shin),김훈섭(Hunseop Kim),이호성(Ho Seong Lee),김산(San Kim),문상준(SangJun Moon),추원식(Won-Shik Chu) 적정기술학회 2022 적정기술학회지(Journal of Appropriate Technology) Vol.8 No.3
우리나라 중소기업은 4차산업혁명시대를 맞이하여 다양한 발전과 개선을 추진하고 있다. 특히 새로운 기술의 적용과 안전이라는 두 가지 관점에서 작업환경개선은 중요한 역할이 가능할 것이다. 본 연구에서는 사이니지를 활용하여 개발된 작업환경개선 모델을 제조업(뿌리산업 중심)적용하고, 그 사용성에 대한 평가를 수행한다. 평가를 위한 지표는 ‘가시화(숫자, 색상, 구획)’, ‘5S(정리, 정돈, 청소, 청결, 습관화)’, ‘안전(화재, 유해/위험물질, 보건 및 설비, 전기, 안전(교육))’, ‘관리체계(생산, 품질, 물류, 안전/환경(인지))’, ‘리더십&전략(경영자의 의지, 전략)’의 다섯가지로 구성하였다. 4가지 뿌리산업분야의 6개 기업을 대상으로 작업환경개선 모델을 적용하여 적용 전/후의 만족도를 평가지표를 기준으로 평가하였다. 모든 지표에서 만족도는 증가하여 작업환경개선 모델의 필요성과 사용성은 긍정적이었으나, 적용에 있어 일부 한계점도 있었다. Small and Medium-sized Enterprises (SMEs) in Korea are faced with developments and improvements due to the 4th Industrial Revolution. Adopting new technologies into the enterprise and improving safety in the factory were the main issues for all SMEs in Korea. For that working environment would play the most important role in the industry. In this study, the ‘working environment improvement model’ based on signage was applied to SMEs (root enterprises), and its usability was evaluated. The evaluation index consisted of five categories: ‘Visualization (number, color, compartment),’ ‘5S (sort, set in order, shine, standardize, sustain),’ ‘Safety (fire, hazard/hazardous substance, health and facility, electricity, safety (education)),’ ‘Management system (production, quality, logistics, safety/environment (cognition)),’ and ‘Leadership & Strategy (management's will and strategy).’ Six enterprises in four different root industries were evaluated based on the evaluation index by applying the working environment improvement model. They assessed the satisfaction of the model (before and after). Satisfaction increased across all indicators, and the need and usability of the workplace improvement model were positive, but there were also some limitations in its application.
Cho, Kyungjin,Jeong, Yeongmi,Seo, Kyu Won,Lee, Seockheon,Smith, Adam L.,Shin, Seung Gu,Cho, Si-Kyung,Park, Chanhyuk Elsevier 2018 Bioresource technology Vol.256 No.-
<P><B>Abstract</B></P> <P>An anaerobic ceramic membrane bioreactor (AnCMBR) has been attracted as an alternative technology to co-manage various organic substrates. This AnCMBR study investigated process performance and microbial community structure at decreasing temperatures to evaluate the potential of AnCMBR treatment for co-managing domestic wastewater (DWW) and food waste-recycling wastewater (FRW). As a result, the water flux (≥6.9 LMH) and organic removal efficiency (≥98.0%) were maintained above 25 °C. The trend of methane production in the AnCMBR was similar except for at 15 °C. At 15 °C, the archaeal community structure did not shifted, whereas the bacterial community structure was changed. Various major archaeal species were identified as the mesophilic methanogens which unable to grow at 15 °C. Our results suggest that the AnCMBR can be applied to co-manage DWW and FRW above 20 °C. Future improvements including psychrophilic methanogen inoculation and process optimization would make co-manage DWW and FRW at lower temperature climates.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Low-temperature anaerobic ceramic membrane bioreactor was evaluated. </LI> <LI> AnCMBR for treating a dilute FRW and domestic wastewater mixture. </LI> <LI> AnCMBR was successfully applied at ambient temperature for co-managing DWW and FRW. </LI> <LI> Microbial community structure was shifted by the temperature changes. </LI> <LI> Methanogenic activity was inhibited at 15 °C in AnCMBR treatment. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Cho, Kyungjin,Shin, Seung Gu,Kim, Woong,Lee, Joonyeob,Lee, Changsoo,Hwang, Seokhwan Elsevier 2017 Science of the Total Environment Vol.601 No.-
<P><B>Abstract</B></P> <P>Microbial community structure in a farm-scale anaerobic digester treating swine manure was investigated during three process events: 1) prolonged starvation, and changes of 2) operating temperature (between meso- and thermophilic) and 3) hydraulic retention time (HRT). Except during the initial period, the digester was dominated by hydrogenotrophic methanogens (HMs). The bacterial community structure significantly shifted with operating temperature and HRT but not with long-term starvation. Clostridiales (26.5–54.4%) and Bacteroidales (2.5–13.7%) became dominant orders in the digester during the period of HM dominance. Abundance of diverse meso- and thermophilic bacteria increased during the same period; many of these species may be H<SUB>2</SUB> producers, and/or syntrophic acetate oxidizers. Some of these species showed positive correlations with [NH<SUB>4</SUB> <SUP>+</SUP>-N] (<I>p</I> <0.1); this relationship suggests that ammonia was a significant parameter for bacterial selection. The bacterial niche information reported in this study can be useful to understand the ecophysiology of anaerobic digesters treating swine manure that contains high ammonia content.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Microbial community was elucidated in a farm-scale digester treating swine manure. </LI> <LI> Hydrogenotrophic methanogens were dominant except during the initial period. </LI> <LI> Bacterial community shifted by temperature and HRT but not by prolonged starvation </LI> <LI> Clostridiales and Bacteroidales were the major partner bacterial orders of HMs. </LI> <LI> Some mesophilic partner bacteria were positively correlated with [NH<SUB>4</SUB> <SUP>+</SUP>-N]. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>