Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 남상집 | - |
| dc.contributor.author | 김다애 | - |
| dc.creator | 김다애 | - |
| dc.date.accessioned | 2025-03-25T16:31:10Z | - |
| dc.date.available | 2025-03-25T16:31:10Z | - |
| dc.date.issued | 2023 | - |
| dc.identifier.other | OAK-000000201907 | - |
| dc.identifier.uri | https://dcollection.ewha.ac.kr/common/orgView/000000201907 | en_US |
| dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/271611 | - |
| dc.description.abstract | Natural products isolated from microorganisms and plants have been steadily attracting attention as a source of drug. In particular, natural products obtained from marine-derived microorganisms are a useful source of novel bioactive compounds with drug potential due to the extreme environment and their particular pathways. Plants and their phytochemicals have been used as herbal remedies and traditional medicine, and even today, their use is increasing. In this study, an investigation of marine-derived microorganisms and herbal plant was conducted to discover natural products with biological activities. Through the investigation, two new compounds (1−2) were obtained from marine-derived microorganism Streptomyces sp. CNQ-617 as well as one previously reported compound (3). Furthermore, four known compounds (4−7) were obtained from the flower of marigold. The chemical structure of two new natural compounds (1 and 2) were elucidated by extensive MS, UV, optical rotation and NMR data analysis, while chemical structures of previously reported compounds (3−7) were identified from the comparison of NMR data to those of reported ones. In addition, their biological activities were tested.;미생물과 식물로부터 분리된 천연물은 의약품의 원료로 꾸준히 주목받고 있다. 특히, 해양 유래 미생물에서 얻은 천연물은 극한 환경과 특정한 물질 합성 경로로 인해 약품 잠재력을 가진 새로운 생물 활성 물질에 대한 유용한 공급원이다. 식물과 식물 함유 화학 물질들은 약초 치료법과 전통 의약품으로 사용되어 왔고, 오늘날에도 그 쓰임은 계속 증가하고 있다. 본 연구에서는 생물 활성을 가진 천연물을 발견하기 위해 해양 유래 미생물과 허브 식물에 대한 연구를 진행하였다. 연구를 통해 해양 유래 미생물인 Streptomyces sp. CNQ-617에서 두 개의 새로운 물질(1−2)과 기존에 보고되었던 물질(3)을 분리하였다. 또한 마리골드의 꽃으로부터 네 개의 알려진 물질(4−7)을 분리하였다. 신규 물질(1−2)의 구조는 MS, UV, 광학 활성 및 NMR 분석을 통해 확립되었으며, 알려진 물질(3−7)의 구조는 기존에 보고되었던 문헌의 NMR 데이터와의 비교 분석을 통해 결정하였다. 분리된 물질들의 생물학적 활성 또한 실험되었다. | - |
| dc.description.tableofcontents | Ⅰ. Introduction 1 Ⅱ. Two Novel Natural Products with Antibacterial Activity from Marine-Derived Streptomyces sp. CNQ-617 8 A. Introduction 8 B. Results and discussion 10 1. Structure elucidation 10 a. Actinoquinazolinone A (1) 10 b. Actinoquinazolinone B (2) 15 c. 7-Hydroxy-6-methoxy-3,4-dihydroquinazolin-4-one (3) 18 2. Biological activity 20 a. Antibacterial activity 20 (1) Minimum Inhibition Concentration (MIC) assay 20 C. Experimental section 22 1. General experimental procedures 22 2. Bacterial strain 23 3. Fermentation, extraction and isolation 23 4. Minimal Inhibitory Concentration (MIC) assay 25 Ⅲ. Four Natural Products with Antiviral Activity from Marigold Flower 27 A. Introduction 27 B. Results and discussion 29 1. Structure elucidation 29 a. Isorhamnetin 3-O-glucoside (4) 29 b. Calendoside III (5) 33 c. Narcissin (6) 37 d. Loliolide (7) 40 2. Biological activity 42 a. Antiviral activity 42 (1) Antiviral activities of MARI partition fractions 42 (2) Antiviral activities of MARI-EA C18 fractions 43 C. Experimental section 44 1. General experimental procedures 44 2. Plant materials 44 3. Extraction and isolation 44 4. Antiviral activity 47 References 48 List of Supplement Figures 55 국문 초록 76 | - |
| dc.format | application/pdf | - |
| dc.format.extent | 2029628 bytes | - |
| dc.language | eng | - |
| dc.publisher | 이화여자대학교 대학원 | - |
| dc.subject.ddc | 500 | - |
| dc.title | Natural Products from Streptomyces sp. CNQ-617 and Flower of Marigold | - |
| dc.type | Master's Thesis | - |
| dc.creator.othername | Kim, Da-Ae | - |
| dc.format.page | v, 76 p. | - |
| dc.identifier.thesisdegree | Master | - |
| dc.identifier.major | 대학원 화학·나노과학과 | - |
| dc.date.awarded | 2023. 2 | - |