바이오필터 효율에 미치는 담체의 영향

홍성도,명성운,최호석 충남대학교 공업교육연구소 2000 論文集 Vol.23 No.1

We studied on the removal of toluene vapors in a lab-scale biofilter. Biofiltration was performed in a column with upflow toluene-contaminated air under ambient conditions. The column was packed with mixture of Peat and Calstone(5:3 vol. Ratio), synthetic media, and bark and wood chip, which were inoculated with Pseudomonas putida. The biofilter was operated under the conditions of various inlet toluene concentrations for 180days. The effect of operating conditions such as flow rate, inlet toluene concentration and moisture contents on the performance of the biofilter was sequentially investigated in this study. The biofilter treated the toluene containing air up to a maximum elimination capacity of 40g/m^(3)hr at the inlet load of 30g/m^(3)hr with percentage removals of 20~90% when gas retention times were between 1 and 2min. The pressure drop through the biofilter column was negligible such as 0.054cmH_(2)O/m.

環境倫理觀의 確立과 期待效果에 관한 小考

홍금우,정성윤 朝鮮大學校 社會科學硏究所 2003 社會科學硏究 Vol.24 No.2

I. 서론 II. 환경윤리와 인간 III. 환경윤리관의 확립 IV. 환경윤리관의 확립에 따른 기대효과 V. 결론

탈아미노반응과 니트로화 반응을 이용한 아닐린과 이소퀴놀린 유도체의 합성

홍장후,김운겸,최상회 서울産業大學校 1999 논문집 Vol.49 No.2

This study is to develop a new synthetic method for the nitroarenes vis non-electrophilic substitution. Direct nitration at the C-1 position of isoquinoline has never been reported and substitution in isoquionoline under the normal nitration condition occurs at C-5 and C-8. We have demonstrated a facile one-step sythetic method for the nitration of isoqunolines at the C-1 position, which involves the electrophilic attack of a DMSO-Ac₂O complex, followed by nucleophilic addition of nitrate ion the this intermeddiate. Since the reaction is simple and mild, this method has preparative merit since 1-nitroisoqunolines are nto readily accessible by other methods. Application to the synthesis of poly nitroarenes from the corresponding anilines was also described.

정상과 갑상선 종양조직에서 사람 IGF-I 유전자의 발현

김성운,장현하,박상미,김덕윤,우정택,양인명,김진우,김영설,김광원,고석환,홍성화,최영길 경희대학교 유전공학연구소 1993 遺傳工學論文集 Vol.5 No.-

Many of the growth-promoting properties of growth hormone(GH) are mediated by insulin-like growth factor-I(IGF-I), a highly conserved circulating 70-amino acid peptide. Recent studies have shown that multiple mechanisms influence IGF-I gene expression, including transcription from two promoters, alternative RNA splicing, and variable polyadenylation. In thyroid tissue, thyroid stimulating hormone(TSH) and IGF-I are the most possible candidates for follicular cell proliferation and hypertrophy. Actually IGF-I had autocrine and paracrine effect for tissue growing. We prepared thyroid tumor tissue mRNAs using single step method for detecting IGF-I levels according to different tissues, i.e., thyroid adenoma or papillary thyroid carcinoma. We used Northern blot analysis for IGF-I mRNA and RNase protection assay (RPA) for IGF-I transcription start sites. For Northern blot, we used whole human IGF-I cDNA as a DNA probe and for RPA, we used IGF-I exon 1 containing noncoding promoter 1 as a riboprobe. We got good RNA bands from Northern blot analysis around 1 kb (IGF-IA) and 7.5 kb (IGF-IB) region. To clarify the amount of both IGF-IA and IB mRNAs, we measured autoradiographied signal of IGF-I mRNAs bands using densitometer. In IGF-IA signals, there's no change among liver and thyroid tissues, but in case of IGF-IB mRNA bands, the signal was markedly increased in thyroid carcinoma tissues than that of normal thyroid tissue (85% vs 14%). In the study of RPA, all thyroid tissues used the same transcription start sites as those of liver's. We concluded that that this different regulation of IGF-I mRNA was originated from tissue specificity. That meant some tissue specific transcription factor/s were related to tissue IGF-I expression.

대학 교양수학 교육 개선을 위한 연구

邊龍聖,洪慶和,金東奭,崔雲行 弘益大學校 1989 弘大論叢 Vol.21 No.2

The purpose of this paper is to improve General Mathematics education programs for engineering students based on an experimental study in the fall semester of 1988. Freshmen classes for General Mathematics course were divided into two groups. One of them, "Special class," was for highly motivated students and the other "Ordinary class," for less motivated students. Both classes had the same basic calculus textbooks. "Special class" students, however, had an extra textbook on elementary linear algebra. Analyzing two examinations and surveys on other university curricula, we concluded that there was no significant difference between two groups. It is suggested that one or two chapters on differential equations and elementary linear algebra should be included in the freshmen general mathematics course.

Rhizopus oryzae를 이용한 바이오 디젤 생산

박상무,홍승준,이기영,김동운 全南大學校 觸媒硏究所 2002 觸媒硏究 論文集 Vol.23 No.-

Biodiesel was produced from soybean oil and methanol using fermentation broth or lipase. Production yield was 62% and 53.5% with purified Rhizopus oryzae lipase and Rhizopus oryzae broth respectively. This yield of biodiesel was highest in case of water content of 20%

IMT-2000 위성시스템의 다중경로 페이딩 채널에서 STTD기법 성능분석

김홍철,김학성,서상우,박운용,신요안,이원철 崇實大學校 2000 論文集 Vol.30 No.1

Recently various types of transmit diversity schemes on time, frequency and space domains to overcome multipath fading have been studied. In particular, an open loop transmit diversity scheme called space-time transmit diversity (STTD) which is based on space-time block codes, is adopted in 3GPP IMT-2000 terrestrial system standard. In this paper, we apply the STTD to IMT-2000 satellite system and investigate its performance. We show that significant performance improvement can be achieved by applying the STTD to two visible satellites in IMT-2000 satellite systems.

생쥐의 바이러스성 심근염에서 합병증 동반 유무에 따른 조직 및 혈청내 금속단백효소억제자의 발현 차이

김성숙,엄대운,우영주,서재희,허주령,홍영미,최인표 대한병리학회 2001 Journal of Pathology and Translational Medicine Vol.35 No.3

신장주위 거대혈종을 보였던 신중후성 출혈열 1예

박운형,김영아,정재한,최소래,강태수,서정건,박흥수,하성규 대한신장학회 2000 대한신장학회잡지 Vol.19 No.6

Matorchis orientalis 表皮 微細構造의 發育 段階別 變化

손운목,홍성종,이순형 인제대학교 1991 仁濟醫學 Vol.12 No.4

Metorchis orientalis의 發育 段階別 表皮 徵細構造를 주사전자현미경을 사용하여 관찰하였다. 충체가 성장 발육함에 따라 腹吸盤이 蟲澧 前方 1/3지점까지 올라와 位置하였고, 排泄孔도 충체 後端에서 腹側 前方으로 많이 올라와서 開ㅁ하였다. 배설공 주위에는 皮棘 및 感覺乳頭가 없고 多孔性의 原形質突起로 이루어진 독특한 구조의 표피가 分布하였다. 口吸盤 및 腹吸難의 口脣에는 각자 10개 및 6개의 제 Ⅱ형 감각유두가 일정한 간격으로 배열되어 있었다. 2일, 5일 및 7일된 幼苦蟲의 앞쪽 및 중간 부위 표피에는 손가락모양의 3∼6분지 피극이, 뒷쪽 부위에서는 송곳모양의 單棘이 분포하였고 2주 및 3주된 성충에서는 前, 中, 後部의 표피에 각각 9∼11分枝, 7∼10分技 밑 6∼7分技의 피극이 분포하였다. 유약충에서 자갈 모양이던 원형질돌기가 성충에서는 융단 모양이었으며 腹側面과 背側面에서 다소 配列樣相이 달랐지만 충체의 左右 外側에 1개 또는 3∼8개(grouped)의 제Ⅰ형 감각유두가 대칭적으로 배열되어 있었다. 감염 후 3주된 충체에서 표피의 破壞 및 脫落 現象이 관찰되었다. 이상의 결과로 M. orientalis의 표피는 감염후 2주까지 원형질돌기 밑 피극의 分化가 계속되고 3주 이상된 충체에서는 표피의 파괴 및 탈락이 일어남을 알 수 있었다. This study was performed to observe the tegumental ultrastructures of Metorchis orientalis according to the developmental stages. The worms were obtained from the experimentally infected chicks at 2, 5, 7, 14 and 21 days post infection. They were prepared for scanning electron microscopic observation and observed by ISI Korea DS-130C SEM at an accelerating voltage of 10 Kv. All worms were elongated and ventrally curved. Their ventral suckers were located in anterior 3/5∼1/3 level. The oral and ventral suckers had 10 and 6 type II sensory papillae respectively in a circular band on their lips. The ventro-anterior and ventro-middle surface of juvenile worms (2-day, 5-day and 7-day old) were regularly arranged with the spines of which tips diverged into 3 to 6 points, and their ventro-posterior surface were arranged with the peg-like single-tipped spines. The ventral surface of adult worms (2-week and 3-week old) was armed with many scale-like spines; 9∼11 pointed ones on anterior body, 7∼10 pointed on middle body and 6∼7 pointed on posterior body. The tegument spines on the dorsal surface were similar to those of ventral side in their shape and distribution. The tegument of juvenile worms was covered with cobblestone-like cytoplasmic processes, however they were changed into velvety texture in that of adults. The ciliated type I sensory papillae appeared biilaterally on the tegument of both side, and they were distributed on anterior tegument to ventral sucker level in group of 3∼8 ones. Destruction and shedding of tegument suggesing worm death and discharge were observed in 3-week old worms. From the above results, it is considered that the tegument of M. orientalis continued to differentiate until 2 weeks after infection, and it was shedded from the body of 3-week old worms.