Secondary metabolites

Flavonoids, a diverse group of secondary metabolites, are known for their health-promoting properties, including antioxidant, anti-inflammatory, and anticancer activities. Phyllanthus amarus is a medicinal plant with extensive traditional use and it is a rich source of flavonoids. This study aimed to elucidate the gene expression in flavonoid biosynthesis in P. amarus.

7p vifilm 11-10-2024 1 0   Download

The genus Dialium belongs to the Caesalpinioideae family, consisting of approximately 30 species distributed in the tropical regions. Secondary metabolites from the Dialium genus have been reported to exhibit various biological activities including antioxidant, cytotoxicity and antimicrobial activities.

6p vibecca 01-10-2024 2 1   Download

In this study, the antidengue virus activity of the ethanol extract from the leaves and twigs of E. cyathophora on four virus serotypes DENV1-DENV4 was examined. The result showed that the ethanol extract displayed antidengue activity on DENV1-4 with PRNT50 values of 15.625-62.5 µg/mL. This extract was fractionated to the n-hexane and ethyl acetate fractions.

7p dianmotminh02 03-05-2024 6 2   Download

Flavonoids are a diverse group of natural compounds extensively studied in various research articles. They are widely distributed in the plant kingdom and exhibit various biological activities, including antioxidant, antiinflammatory, anticancer, antiviral, and antimicrobial effects. The genus Knema Lour., which contains many species in Southeast Asia, has been traditionally used to treat various ailments. The current review aims to provide a comprehensive update on the isolation of flavonoids and other secondary metabolites from the genus Knema Lour. between 1978 and 2022.

15p dianmotminh02 03-05-2024 9 3   Download

The focus of this thesis was to study the chemotaxonomic relationship of selected southern Australian marine brown algae of the genera Cystophora and Sargassum. Consequently, this resulted in the isolation and structure elucidation of six new terpenoids from two southern Australian marine brown algae Cystophora moniliformis and Sargassum fallax together with 10 previously reported natural products. As a result of the re-isolation of these known secondary metabolites, updated and complete structural characterisation data could be provided for the first time for 7 of these compounds.

132p runthenight07 01-03-2023 7 3   Download

The thesis investigates the growth promoting effects of plant growth promoting bacteria (PGPB) in chickpea and wheat. Three main topics covered are: 1) Isolating local Plant Growth Promoting Bacteria; 2) Screening and characterization of isolates; 3) Assessment and identification of the selected strains.

107p runthenight04 02-02-2023 11 4   Download

Thesis aims: Isolation and screening for Vietnam antimicrobial marine-derived actinobacteria strains. Isolation and structure elucidation of compounds from 2 promising isolated actinobacteria strains. Determination the antimicrobial activities of isolated compounds.

26p extraenglish 24-05-2021 27 4   Download

In this study, we evaluated chemical responses of K. obovata and S. caseolaris through comparisons of the content of metabolites and element ions in leaves of mangrove plants located under different ecological conditions in the Red River delta. In the low salinity area (Thuy Truong), specific leaf areas of K. obovata and S. caseolaris were much lower while the succulent index was higher compared to those in the high salinity area (Kim Trung).

13p nguaconbaynhay10 20-02-2021 11 2   Download

Isolation and screening for Vietnam antimicrobial marine-derived actinobacteria strains; isolation and structure elucidation of compounds from 2 promising isolated actinobacteria strains; determination the antimicrobial activities of isolated compounds.

26p capheviahe26 25-01-2021 37 5   Download

Obtaining of secondary metabolites from marine fungi isolated in the Central Vietnam and identifying some biological activities (antibiotimicrobial, cytotoxic, antioxidant, neuroprotective activities) of obtained individual compounds.

27p trinhthamhodang7 31-08-2020 38 2   Download

Polyphosphate polymer (polyP) plays a very important role in every living cell. Synthesis of this linear polymer of phosphate (Pi) residues is catalyzed by the polyphosphate kinase (PPK) enzyme.

16p nutifooddau 27-01-2019 17 2   Download

All higher organisms divide major biochemical steps into different cellular compartments and often use tissue-specific division of metabolism for the same purpose.Such spatial resolution is accompanied with temporal changes of meta-bolite synthesis in response to environmental stimuli or developmental needs.Although analyses of primary and secondary gene products, i.e. transcripts, proteins, and metabolites, regularly do not cope with this spatial and temporal resolution, these gene products are often observed to be highly coregulated forming complex networks....

10p tumor12 20-04-2013 34 2   Download

Our previous studies revealed that the double variant of cytochrome P450 (CYP)105A1, R73V⁄R84A, has a high ability to convert vitamin D3 to its biologically active form, 1a,25-dihydroxyvitamin D3 [1a,25(OH)2D3 ], suggesting the possibility for R73V⁄R84A to produce 1a,25(OH)2D3 . BecauseActinomycetes, including Streptomyces, exhibit properties that have potential advantages in the synthesis of secondary metabolites of industrial and medical importance

11p viettel02 19-02-2013 36 1   Download

The class of nonribosomally assembled siderophores encompasses a multi-tude of structurally diverse natural products. The genome of the erythro-mycin-producing strainSaccharopolyspora erythraeacontains 25 secondary metabolite gene clusters that are mostly considered to be orphan, including two that are responsible for siderophore assembly.

14p mobifone23 18-01-2013 47 4   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Evidence for horizontal transfer of a secondary metabolite gene cluster between fungi...

10p coxanh_8 05-11-2011 41 3   Download

Thực vật là nguồn cung cấp các hợp chất hóa học khác nhau rất có giá trị, chẳng hạn các chất dùng làm dược liệu, các chất tạo mùi, các chất dùng làm gia vị, các sắc tố và các hóa chất dùng trong nông nghiệp (Bảng 7.1). Những sản phẩm này, được biết như là các chất trao đổi thứ cấp (secondary metabolites), thường được sản xuất với một lượng rất nhỏ (dạng vết) trong thực vật và không có chức năng trao đổi chất rõ ràng1. Chúng dường như là sản phẩm của các phản ứng hóa học...

23p lam49sinh 12-08-2011 153 27   Download