http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 최태열(Tae-Yeol Choi) (검색결과 14 건)
- 무료
- 기관 내 무료
- 유료
-
-
음식물 폐기물로부터 수소생산을 위한 2상 혐기성 소화 공정 및 개질반응 연구
최태열 ( Tae-yeol Choi ),박민주 ( Min-ju Park ),정대운 ( Dae-woon Jeong ) 한국폐기물자원순환학회(구 한국폐기물학회) 2020 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2020 No.-
본 연구에서는 음식물 폐기물로부터 바이오가스를 생산하기 위한 2상 혐기성 소화장치의 적용 가능성을 검토하였다. 또한, 2상 혐기성 소화장치로 생산한 바이오가스를 Ni-CeZrO<sub>2</sub> 촉매의 CDR 반응에 적용한 수소 생산과정에 대해서도 가능성을 검증하였다. 2상 혐기성 소화장치를 60일간 운전 시 메탄생성조의 pH는 7.4~8로 유지되었으며, 메탄생성조에서 VFAs의 축적이 발생하지 않아 3g VS/L·day의 농도로 유입되는 음식물쓰레기를 안정적으로 바이오가스로 전환하였다. 개질반응용 가스는 바이오가스의 조성인 CH<sub>4</sub>:CO<sub>2</sub> 50%:50% 조성을 사용하였다. 바이오가스의 개질반응용 Ni-Ce<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>2</sub> 촉매는 공침법으로 제조되었으며, 개질 반응은 600 - 800℃, CH<sub>4</sub>:CO:N<sub>2</sub>=1:1:3, 기체공간속도 480,000h<sup>-1</sup>에서 수행하였다. 촉매 반응 결과, 메탄과 이산화탄소의 조성은 반응온도가 증가할수록 감소하여 800℃에서 각각 4%씩으로 낮은 수치를 나타내었으며, 수소와 일산화탄소는 반응온도가 증가할수록 증가하여 800℃에서 각각 24.6%, 45.4%로 나타났다. 결과적으로 CDR 반응을 통해 86 - 90%의 수율로 수소를 생성할 수 있으므로 음식물 폐기물로부터 바이오가스를 거쳐 수소를 생산하는 공정에 대한 가능성을 검증하였다.
-
최태열 ( Tae-yeol Choi ),박민주 ( Min-ju Park ),김주환 ( Ju-hwan Kim ),이지헌 ( Ji-heon Lee ),이가희 ( Ga-hee Lee ),김학민 ( Hak-min Kim ),정대운 ( Dae-woon Jeong ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회지 Vol.38 No.2
Heavy metal in paper sludge ash is removed by various acids, including ethylenediaminetetraacetic acid (EDTA), citric acid (CA), oxalic acid (OA), and hydrochloric acid (HCl). Among the various acids, the EDTA and OA show higher removal efficiencies for Pb, Cu, As, and Cd. In addition, the single, mixed, and sequence washing methods with EDTA and OA are compared to enhance the removal efficiencies of heavy metals. We found that the mixed washing method with EDTA and OA is the best at removing Pb, Cu, As, Hg, and Cd, achieving removal efficiencies of 49.19%, 31.29%, 28.42%, 10.00%, and 11.33%, respectively. We analyzed the elution concentrations of CN and Cl and the CaO content of the paper sludge ash to consider the possibility of recycling it. The elution concentrations of heavy metals, CN, and Cl satisfied the legal standards for paper sludge ash recycling.
-
-
-
-
폐기물 합성가스로부터 수소회수를 위한 고온가스전이(HTS) 반응용 Co-Nb-CeO2 촉매의 Nb 담지량의 영향
변희주(Hui-Ju Byeon),최태열(Tae-Yeol Choi),정대운(Dae-Woon Jeong) 한국열환경공학회 2020 한국열환경공학회 학술대회지 Vol.2020 No.춘계
In this study, it have been evaluated that the catalytic performance of Co-Nb-CeO2 catalysts with different Nb loading in HTS(High Temperature Shift; CO + H2O → CO2 + H2) reaction. The Nb promoter increases the catalytic performance in the water gas shift reaction. In addition, this promoter prevents the methanation which is a side reaction in WGS reaction. Co-Nb-CeO2 catalysts with different Nb loading have been prepared by co-precipitation method. To understand the physico-chemical properties of the catalysts, various techniques such as BET, XRD, H2-TPR are carried out. HTS reaction has been performed at severe condition with a GHSV(Gas Hourly Space Velocity) of 286,000h-1. Among the prepared catalysts, the 1.5 wt.% Nb promoted Co-Nb-CeO2 catalyst showed the highest CO conversion (Temp. = 450 oC, XCO = 86%) and the lowest CH4 selectivity than the other catalysts. This result suggests that the 1.5 wt.% Nb promoted Co-Nb-CeO2 could be used as a promising catalyst for the HTS reaction to produce hydrogen from waste-derived synthesis gas. and the 1 wt.% Nb promoted Cu-Nb-CeO2 catalyst.
-
문진화,오성희,김학원,문수지,최태열,Moon, Jin Hwa,Oh, Sung Hee,Kim, Hak Won,Moon, Su Jee,Choi, Tae Yeol 대한소아감염학회 2002 Pediatric Infection and Vaccine Vol.9 No.2
목 적: 본원 신생아실 및 신생아 중환자실에서 10년간 발생한 신생아 패혈증을 조사하여 환아들의 특징, 패혈증의 원인균 및 항생제 감수성의 변화를 파악하고 신생아 패혈증을 치료하는데 도움되고자 하였다. 방 법: 1989년부터 1998년까지의 10년간 본원 신생아실 및 신생아 중환자실에 입원하였던 환아 15,144명에 대해 의무기록을 확인하여 신생아 패혈증으로 진단된 환아를 선별하였다. 조사 기간을 1989년부터 1993년까지(전반기)와 1994년부터 1998 년까지(후반기)로 나누어 패혈증으로 진단된 환아 들의 임상적 특징, 균의 종류와 빈도, 항생제 감수성의 변화 양상을 관찰하였다. 결 과 : 신생아 패혈증은 총 15,144명 중 170명에서 진단되어 1.1%(전반기 91명, 1.2%, 후반기 79명 1.0%)이었으며, 186회(전반기 99회, 후반기 87회)에 걸쳐 200개의 균주(전반기 109균주, 후반기 91균주)가 분리동정 되었다. 평균 발병시기는 생후12.3일로 전반기 8.8일, 후반기 16.3일이었고, 조발형은 전반기 34.7%, 후반기 23.0%로 나타나 전반기에 더 빨리 발병하였다. 분리된 균주는 그람양성균 132회 (66.0%), 그람음성균 60회(30.0%), 진균 8회(4.0%)이었으며, Coagulase negative Staphylococcus(CNS)가 총 69회(34.5%)로 가장 많은 빈도를 나타내었고, Staphylococcus aureus(S. aureus) 36회(18.0%), Klebsiella pneumoniae(K. pneumoniae) 17회(8.5%), Enterococcus 12회(6.0%), Enterobacter cloacae(E. cloacae) 8회(4.0%), Escherichia coli(E. coli) 6회(3.0%), Pseudomonas aeruginosa(P. aeruginasa) 5회(2.5%) 등의 순이었다. 진균으로는 Candida parapsilosis, Candida albicans, Trichosporon pullulans 가 분리되었다. CNS, S. aureus 및 Acinetobacter baumannii(A. baumanii), Candida는 전반기에 비해 후반기에 더 많이 분리 동정되었으며, CNS 및 S. aureus의 methicillin 및 1세대 cephalosporin에 대한 항생제 감수성은 전반기에 비해 후반기에 감소하였고 aminoglycosides에 대한 감수성은 후반기에 증가하였으며, vancomycin 내성균은 분리되지 않았다. K. pneumoniae, Enterococcus, E. coli 및 P. aeruginosa는 전반기에 비해 후반기에 감소하였으며 K. pneumoniae는 1세대 cephalosporin에 대해 전, 후반기 모두 낮은 감수성을 보였고 tobramycin과 gentamicin에는 후반기에 감수성이 증가하였으며 amikacin, ceftriaxone, trimethoprim-sulfamethoxazole에는 전, 후반기 모두 높은 감수성을 보였다. Enterococcous는ampicillin, penicillin 및 1세대 cephalosporin에 대한 감수성이 후반기에 감소하였으나 vancomycin 내성균은 분리되지 않았다. 결 론 : 지난 10년간의 신생아 패혈증의 발생 빈도는 1.1%이었으며, CNS와 S. aureus가 신생아 패혈증의 주 원인균이었고, 일차 항생제에 대한 감수성은 전반기에 비해 후반기에 감소하였으나 vanco- mycin 내성균은 발견되지 않았다. 신생아 패혈증의 주요 원인균으로 알려진 group B Streptococcus는 발견되지 않았으며, K. pneumoniae에 의한 신생아 패혈증은 후반기에 더 많이 발생하였으나 항생제 감수성은 감소되지 않았다. Background : To delineate the changes in the causative agents of neonatal sepsis and their antimicrobial susceptibilities in the neonatal intensive care unit and nursery of Hanyang University Hospital during the past 10 years. Methods : Hospital records of 15,144 patients hospitalized at the NICU and nursery of Hanyang University Hospital from 1989 to 1998 were reviewed and neonates diagnosed of neonatal sepsis were sorted and included in the study. The study period was divided into Period A(the first 5 years) and Period B(the second 5 years) to analyse causative agents and their antimicrobial susceptibilities. Results : Neonatal sepsis was diagnosed in 170 patients(1.1%{Period A 1.2%, Period B 1.0%}) among the total of 15,144 inpatients. Two hundred isolates(Period A 109 isolates, Period B 91 isolates) were identified in 186 blood cultures(Period A 99 cultures, Period B 87 cultures) from 170 patients(Period A 91 patients, Period B 79 patients). The average age at the onset of the disease, when the initial blood culture was drawn, was 12.3 days old(Period A 8.8 days, Period B 16.3 days), and the proportion of the early onset disease was 34.7% in Period A and 23.0% in Period B, indicating that neonatal sepsis developed earlier during Period A. Among the isolated organisms including Gram positive bacteria[132(66.0%)], Gram negative bacteria [60(30.0%)], and fungi[8(4.0%)], coagulase negative Staphylococcus(CNS) was the most common organism(69/34.5%), followed by Staphylococcus aureus(36/18.0%), Klebsiella pneumoniae(17/8.5%), Enterococcus(12/6.0%), Enterobacter cloacae(8/4.0%), Escherichia coli(6/3.0%), and Pseudomonas aeruginosae(5/2.5%). The isolated fungi were Candida parapsilosis, Candida albicans, and Trichosporon pullulans. CNS, S. aureus and Acinetobacter baumannii were isolated more frequently in Period A compared to Period B. Antimicrobial susceptibilities of CNS and S. aureus to methicillin and the first generation cephalo sporins were decreased in Period B compare to Period A, those to aminoglycosides were increased in Period B, and vancomycin resistant strains were not identified. K. pneumoniae, Enterococcus, E. coli, and P. aeruginosa were isolated less frequently in Period B, compared to Period A. For K. pneumoniae, antimicrobial susceptibilities to the first generation cephalosporins were low in both Periods A and B, those to tobramycin and gentamicin were increased in Period B, and those to amikacin, ceftriaxone, and trimethoprim-sulfamethoxazole were high in both Periods A and B. Antimicrobial susceptibilities of Enterococcous to ampicillin, penicillin, and the first generation cephalosporins were decreased in Period B, but vancomycin resistant strains were not identified. Conclusion : The occurrence rate of neonatal sepsis during the past 10 years in the NICU and nursery of the Hanyang University hospital was 1.1%, and the most common causitive agents were CNS and S. aureus, to which the antimicrobial susceptibilities to the first line drugs decreased in the later half of the study period with no vancomycin resistant isolates identified. Group B Streptococcus known to be the most common agent causing neonatal sepsis was not identified, and K. pneumoniae was isolated more commonly during the later half of the study period without decreased antimicrobial susceptibilities.
-
-
崔泰烈 全北大學校附設 스포츠科學硏究所 1987 논문집 Vol.- No.4
This paper examines some characteristics of the instrumental music of peasants in Iri area through the research of oral reports by the arts possessor. This is a successive study of the topic discussed in my Masters thesis, " A Study on the Dance Accompanied by Instrumental Music in Chonbuk Province," in which I traced the artistic value of peasant music and proposed the urgent need to cultivate male dance performance through comparing the differences between eastern( or right) and western (or left) peasant music. The purpose of this study is two-field: to regionnalize the curricula and to cultivate some materials for the instruction of traditional dance. In this study, the origin and transition of peasant music in Iri area is examined in the context of regional and environmental characteristics, and the change of economical situation accompanied to the social development. I, in the main discourse, studied the formation, color and style of attire, rhythm, contents, and forms of Iri peasant music, especially, the superiority of Seol-jang-gu dance, one of the characteristics of Iri peasant music, and the marching dance with diversity and peculiarity. I found the outstanding arts of Seol-jang-gu dance enabled itself to be appointed as one of the essential intangible cultural properties in the field of Korean folk dance, and the diversity of marching dance was very valuable so as to be cultivated as the essential materials for dance performance. In conclusion, I asserted that the systematic study of Iri peasant music should be pursued in order to hand it down as an important material of folk culture, to materialize it for the curricula from the elementary school to the high scool, and to regionalize the curricula. I also insisted that an appropriate hall should be constructed in order to continue further physical, emotional, aesthetical, and physiological study and to hand it down effectively. And I highly confirmed that investment in the education and cultivation of dance performance are indispensable to the development of Korean athletic dance. Finally, I asserted that the instruction of Iri peasant music should be a kind of local cultural materials so that it might be used as an essential material to cultivate patriotism, host spirit, honor, and frontier spirit.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
