• 제목/요약/키워드: Env

검색결과 417건 처리시간 0.03초

환경기초시설에서 발생하는 악취가스 제거에 관한 연구 (The Study on the Removal of Odor Emitting Environmental Fundamental Facility)

  • 이병관;이상훈;탁성제;이병기
    • 한국기후변화학회지
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    • 제8권1호
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    • pp.51-56
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    • 2017
  • The objective of the research project is to develop the hybrid deodorizer for the removal of residual harmful gases generating during pretreatment process of biogas. This hybrid deodorizer is capable of treating harmful gases that contains hydrogen sulfide ($H_2S$), ammonia ($NH_3$) and other odor substances. This hybrid deodorizer reduced the hydrogen sulfide content from approximately 150~200 ppm to less than 16 ppm. These residual harmful gases were effectively removed in the effluent, achieving up to 97% removal of $H_2S$ and 94% removal of $NH_3$ after treatment using hybrid deodorizer.

Expression profiles of human endogenous retrovirus (HERV)-K and HERV-R Env proteins in various cancers

  • Ko, Eun-Ji;Song, Kyoung Seob;Ock, Mee Sun;Choi, Yung Hyun;Kim, Suhkmann;Kim, Heui-Soo;Cha, Hee-Jae
    • BMB Reports
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    • 제54권7호
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    • pp.368-373
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    • 2021
  • The vertebrate genome contains an endogenous retrovirus that has been inherited from the past millions of years. Although approximately 8% of human chromosomal DNA consists of sequences derived from human endogenous retrovirus (HERV) fragments, most of the HERVs are currently inactive and noninfectious due to recombination, deletions, and mutations after insertion into the host genome. Several studies suggested that Human endogenous retroviruses (HERVs) factors are significantly related to certain cancers. However, only limited studies have been conducted to analyze the expression of HERV derived elements at protein levels in certain cancers. Herein, we analyzed the expression profiles of HERV-K envelope (Env) and HERV-R Env proteins in eleven different kinds of cancer tissues. Furthermore, the expression patterns of both protein and correlation with various clinical data in each tissue were analyzed. The expressions of both HERV-K Env and HERV-R Env protein were identified to be significantly high in most of the tumors compared with normal surrounding tissues. Correlations between HERV Env expressions and clinical investigations varied depending on the HERV types and cancers. Overall expression patterns of HERV-K Env and HERV-R Env proteins were different in every individual but a similar pattern of expressions was observed in the same individual. These results demonstrate the expression profiles of HERV-K and HERV-R Env proteins in various cancer tissues and provide a good reference for the association of endogenous retroviral Env proteins in the progression of various cancers. Furthermore, the results elucidate the relationship between HERV-Env expression and the clinical significance of certain cancers.

Cluster Analysis of Phytoplankton in Gamak Bay

  • Oh, Hyun-Taik;Yoon, Sang-Pil;Lee, Won-Chan;Jung, Rae-Hong;Hong, Suk-Jin;Lee, Young-Wu
    • 한국환경과학회:학술대회논문집
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    • 한국환경과학회 2008년도 추계학술발표회 발표논문집
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    • pp.277-279
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    • 2008
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Genesis of two contrasting metallogenic provinces in the Cretaceous Gyeongsang Basin, Korea

  • Park, Seon-Gyu;Lee, Sang-Yeol;So, Chil-Sup;Ryu, In-Chang;Wee, Soo-Meen;Park, Sang-Hoon;Heo, Chul-Ho
    • 대한자원환경지질학회:학술대회논문집
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    • 대한자원환경지질학회 2003년도 춘계 학술발표회 논문집
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    • pp.184-185
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    • 2003
  • The Cretaceous magmatism in the Gyeongsang Basin, which intruded into the upper crust or extruded throughout ENE-trending volcanic belts in southern Korea, led to the formation of two contrasting metallogeinic provinces: the Haman-Gunbug-Goseong and the Euiseong. The Haman-Gunbug-Goseong metallogenic province in the southwestern portion of the Gyeongsang Basin consists of dominantly nonmarine sedimentary rocks (e.g., the Sindong and Hayang groups) which are rarely intercalated with andesitic pyroclastics and flows. (omitted)

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The genetic implication of gold-silver mineralization in the Suryun mine, Korea

  • Pak, Sang-Joon;Park, Seon-Gyu;Song, Yun-Sub;Park, Sang-Hoon
    • 대한자원환경지질학회:학술대회논문집
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    • 대한자원환경지질학회 2003년도 춘계 학술발표회 논문집
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    • pp.186-188
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    • 2003
  • The Suryun gold-silver mine is one of precious metal occurrences discovered in the Hapcheon mineralized district on which lies the western margin of the Cretaceous Gyeongsang Basin, Korea. The district hosts deposits that include the early to late Cretaceous (108 ~ 88 Ma) Au-Ag-bearing vein systems (So et al. 1989; Shelton et al. 1990). (omitted)

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부탄분해미생물에 의한 가솔린첨가제 MTBE(Methyl tert-Butyl Ether) 분해 (Biodegradation of Gasoline Oxygenate MTBE(Methyl tert-Butyl Ether) by Butane-Utilizing Bacteria)

  • 장순웅;백승식;이시진
    • 한국지하수토양환경학회지:지하수토양환경
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    • 제6권3호
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    • pp.31-41
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    • 2001
  • 본 논문에서는 순수균주인 ENV425와 오염된 토양으로부터 분리한 혼합균주를 이용하여 가솔린 산화제인 MTBE에 대한 분해 가능성을 조사했다. MTBE는 n-butane에서 성장한 ENV425와 혼합균주에 의해 공대사적으로 분해가 이루어졌다. 또한 아세틸렌의 첨가에 의해 n-butane과 MTBE의 분해가 완전히 방해되어짐에 따라 두 기질 모두 부탄 분해 효소에 의해 분해되어짐을 알 수 있었다. n-butane에서 성장한 ENV42S와 혼합균주는 MTBE를 분해하고, MTBE의 분해산물로 TBA가 생성되었다. TBA의 생성은 분해된 MTBE에 대하여 ENV425와 혼합균주 각각 54.7%, 58.6%가 관찰되었다. 그러나, Resting cell 실험에서는 ENV425와 혼합균주에 의한 산화 생성물로 TBA와 TBF가 생성되었다. ENV425와 혼합균주에 의한 최대 MTBE 분해속도는 각각 52.3 그리고 62.3 (nmol MTBE degraded/hr/mg TSS), 최대 $T_y$ (Transformation yield)는 각각 44.7, 34.0 (nmol MTBE degraded/$\mu$mol n-butane utilized)으로 나타났고, 최대 $T_c$ (Transformation capacity)는 각각 199, 226 (nmol MTBE degraded/mg TSS used)으로 나타났다.

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