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dc.contributor.advisor남상집*
dc.contributor.author조영림*
dc.creator조영림*
dc.date.accessioned2024-01-22T16:31:15Z-
dc.date.available2024-01-22T16:31:15Z-
dc.date.issued2024*
dc.identifier.otherOAK-000000212735*
dc.identifier.urihttps://dcollection.ewha.ac.kr/common/orgView/000000212735en_US
dc.identifier.urihttps://dspace.ewha.ac.kr/handle/2015.oak/266778-
dc.description.abstractApproximately 75% of the Earth's surface is enveloped by the marine environment, serving as a habitat for over 80% of the planet's life forms. Despite its vast expanse, much of the marine realm remains uncharted. Within this expansive domain, a myriad of macro and microorganisms thrive, adapting with unique metabolic capabilities to endure various and challenging e cosystems. This adaptation leads to the production of a diverse array of secondary metabolites, each endowed with specific activities crucial for the organisms' survival. In this study, the isolation and elucidation of one new c ompound and eleven novel compound s, from marine derived actinobacteria, Streptomyces sp. LMA 171 and Brevibacterium sp. VSVD 004 . The chemical structure of Compound ( 1 was elucidated by extensive MS, UV, and NMR data analysis, while chemical structures of previously reported compounds ( 2 12 ) were identified by comparing their NMR data with those of known data.;지구 표면의 약 75% 는 해양 환경으로 덮여 있으며 , 이곳은 지구 의 생명 체가 약 80% 가 서식 할 것으로 알려져 있다. 그러나 이 거대한 지역의 많은 부분은 여 전히 밝혀지지 않은 상태 이다 . 이 넓은 영역에서 수많은 크고 작은 생물들 은 다양하고 극한 생태계를 견뎌내기 위해 독특한 대사작용을 통해 생존 하고 있다. 이러한 적응은 다양한 2 차 대사산물을 생성하며 , 각 화합물은 해당 생물체의 생존에 중요한 특성을 부여한다. 본 연구에서는 해양 유래 액티노박테리아인 Streptomyces sp. LMA 171 및 Brevibacterium sp. VSVD 004 로부터 총 1 개의 신규 물질 과 11 개의 밝혀졌던 물질을 분리 및 해명 했다. 물질 1 의 화학 구조는 MS, UV 및 NMR 데이터 분석을 통해 해명되었으며 , 이전에 보고된 화합물들 2 12 의 화학 구조는 해당 데이터를 기존 데이터와 비교하여 식별했다.*
dc.description.tableofcontentsI. Introduction 1 II.Two Natural Products with antibacterial activities from Brevibacterium sp. VSVD004 5 A. Introduction 5 B. Results and discussion 7 1. Structure Elucidation 7 a. VSVD004.488 (1) 7 b. Aloe-emodin (2) 11 2. Biological activity 13 a. Antibacterial activity 13 C. Experimental section 15 1. General experimental procedures 15 2. Bacterial strain 15 3. Fermentation, extraction and isolation 16 4. Minimum inhibition concentration assay 16 D. Conclusion 18 III. Ten Natural Products with Whitening 20 Activity from Marine-Derived Streptomyces sp. LMA171 20 A. Introduction 20 B. Results and discussion 22 3. Structure Elucidation 22 a. 2-methylquinazolin-4(3H)-one (3) 22 b. N-(4-hydroxyphenethyl)acetamide (4) 24 c. 2-phenylacetic acid (5) 26 d. 3-(Hydroxyacetyl)indole (6) 27 e. N-(4-hydroxyphenethyl)isobutyramide (7) 29 f. N-phenethylacetamide (8) 32 g. N-phenethylpropionamide (9) 34 h. N-phenethylisobutyramide (10) 36 i. 2-methyl-N-phenethylbutanamide (11) 38 j. 3-methyl-N-phenethylbutanamide (12) 40 2. Biological activity 42 a. Antibacterial activity 42 C. Experimental section 44 1. General experimental procedures 44 2. Bacterium strain 45 3. Fermentation, extraction and isolation 45 4. Minimum inhibition concentration assay 46 D. Conclusion 47 Appendix 49 References 58 국문초록 85*
dc.formatapplication/pdf*
dc.format.extent1662206 bytes*
dc.languageeng*
dc.publisher이화여자대학교 대학원*
dc.subjectMarine natural products, Streptomyces sp., Brevibacterium sp., Secondary metabolites, Biological activity*
dc.subject.ddc500*
dc.titleNatural Products from Brevibacterium sp. VSVD-004 and Streptomyces sp. LMA-171*
dc.typeMaster's Thesis*
dc.creator.othernameCho, youngrim*
dc.format.pagevi, 85 p.*
dc.identifier.thesisdegreeMaster*
dc.identifier.major대학원 화학·나노과학과*
dc.date.awarded2024. 2*
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