scholarly journals Isolation and characterization of pigmented bacteria showing antimicrobial activity from Malaysian marine environment

2013 ◽  
Author(s):  
Jafarzade, M. ◽  
Yahya, N. A. ◽  
Mohamad, S. ◽  
Usup, G. ◽  
Ahmad, A.
Keyword(s):  
Antimicrobial Activity ◽  
Marine Environment ◽  
Isolation And Characterization ◽  
Pigmented Bacteria

scholarly journals Characterization and Antimicrobial Activities of a Metabolite from a New Streptomyces Species from Bangladeshi Soil

2009 ◽  
Vol 2 (1) ◽  
pp. 178-185
Author(s):  
M. Akhand ◽  
M. A. A. Al-Bari ◽  
M. A. Islam ◽  
Proma Khondkar
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Activities ◽  
Assay Method ◽  
Streptomyces Species ◽  
Isolation And Characterization ◽  
Test Organisms ◽  
Actinomycete Strain ◽  
Diffusion Assay ◽  
Strong Antimicrobial Activity

A new actinomycete strain was isolated from Western part of Bangladesh and identified as a new Streptomyces species on the basis of its morphological, biochemical, cultural characteristics and 16S rRNA data. The present paper describes the isolation and characterization of compound 1 from this new Streptomyces species with the help of various chemical and spectroscopic methods. Antimicrobial activity of compound 1 was tested by disc diffusion assay method and compared with that of standard antibiotics (Kanamycin for antibacterial activity and Nystatin for antifungal activity). The compound has been found to exhibit moderate to strong antimicrobial activity against the test organisms. Cytotoxicity of the compound 1 and the pet. ether extract of Czapek Dox (alkaline) broth of Streptomyces species was evaluated in brine shrimp bioassay with LC50 values of 23.85 µg/ml (ppm) and 19.95 µg/ml (ppm), respectively. Keywords: Streptomyces; Antimicrobial activity; Cytotoxicity. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i1.3079                  J. Sci. Res. 2 (1), 178-185 (2010)  

ISOLATION AND CHARACTERIZATION OF BIOTECHNOLOGY RELEVANT BACTERIA FROM MARINE ENVIRONMENT

2015 ◽  
Vol 77 (31) ◽  
Author(s):  
Suganthi Thevarajoo ◽  
Chitra Selvaratnam ◽  
Kian Mau Goh ◽  
Fazilah Abd. Manan ◽  
Zaharah Ibrahim ◽  
...  
Keyword(s):  
16S Rrna ◽  
Marine Environment ◽  
Antibiotic Sensitivity ◽  
Marine Microorganisms ◽  
Bacterial Strains ◽  
Biochemical Tests ◽  
16S Rrna Sequence ◽  
Gram Staining ◽  
Isolation And Characterization

Marine environment remained as largely unexplored source for researchers to discover marine microorganisms with novel properties. This study aims to isolate marine bacteria from the seashore of Desaru, Malaysia. Totally, six bacterial strains were successfully obtained and were identified by complete 16S rRNA sequencing. The characterizations of bacterial strains were performed based on morphological tests, Gram-staining, biochemical tests, and antibiotic sensitivity. The 16S rRNA sequence of D-2, D-4, D-7, D-15, D-31, and D-33 revealed a high identity of 97 to 99% with taxa belong to genera of Pseudomonas, Marinomonas, Exiquobacterium, Micrococcus, Pseudoalteromonas, and Shewanella respectively. Strain D-31 exhibited higher tolerance towards antibiotics kanamycin, ampicillin, and erythromycin while the growth of other strains were retarded by at least two of these antibiotics. We further characterized strain D-4 and D-31 that belonged to Marinomonas sp. and Pseudoalteromonas sp.. Both genera are interesting as earlier researchers have discovered new antibacterial substances, industrial enzymes and unique secondary metabolites.

Isolation and Characterization of a Novel Endophytic Streptomyces SUK 06 with Antimicrobial Activity from Malaysian Plant

2008 ◽  
Vol 7 (2) ◽  
pp. 189-194 ◽  
Author(s):  
Norazli Ghadin ◽  
Noraziah M. Zin ◽  
Vikineswary Sabaratnam ◽  
Norhidayah Badya ◽  
Dayang F. Basri ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Isolation And Characterization ◽  
Endophytic Streptomyces

Isolation and characterization of marine pigmented bacteria from Norwegian coastal waters and screening for carotenoids with UVA-blue light absorbing properties

2010 ◽  
Vol 48 (1) ◽  
pp. 16-23 ◽  
Author(s):  
Marit H. Stafsnes ◽  
Kjell D. Josefsen ◽  
Geir Kildahl-Andersen ◽  
Svein Valla ◽  
Trond E. Ellingsen ◽  
...  
Keyword(s):  
Blue Light ◽  
Coastal Waters ◽  
Isolation And Characterization ◽  
Pigmented Bacteria
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