نتایج جستجو برای: actinomycetes

تعداد نتایج: 2577  

2013
M. F. Adegboye

The rapid emergence of antimicrobial resistance among pathogens has led to a renewed interest to search for novel antimicrobial agents. The history of new drug discovery processes shows that novel skeletons have, in the majority of cases come from natural sources. This involves screening of microorganisms or plant extracts. They have been the source of, or inspiration for the development of che...

Journal: :Indian Journal of Pharmaceutical Sciences 2022

Actinomycetes were isolated from the sediment samples collected Pichavaram Mangrove forest in Thandavarayan Sholagan Pet, Chidambaram Taluk, Cuddalore district, Tamilnadu, South India. The actinomycetes screened for antibacterial (bioactive metabolite) production against Gram positive and negative bacterial organisms. Molecular characterization was performed through 16S rRNA gene amplification ...

2012
Wei Sun Chongsheng Peng Yunyu Zhao Zhiyong Li

Compared with the actinomycetes in stone corals, the phylogenetic diversity of soft coral-associated culturable actinomycetes is essentially unexplored. Meanwhile, the knowledge of the natural products from coral-associated actinomycetes is very limited. In this study, thirty-two strains were isolated from the tissue of the soft coral Scleronephthya sp. in the East China Sea, which were grouped...

Journal: :Marine Drugs 2009
Kui Hong An-Hui Gao Qing-Yi Xie Hao Gao Ling Zhuang Hai-Peng Lin Hai-Ping Yu Jia Li Xin-Sheng Yao Michael Goodfellow Ji-Sheng Ruan

The mangrove ecosystem is a largely unexplored source for actinomycetes with the potential to produce biologically active secondary metabolites. Consequently, we set out to isolate, characterize and screen actinomycetes from soil and plant material collected from eight mangrove sites in China. Over 2,000 actinomycetes were isolated and of these approximately 20%, 5%, and 10% inhibited the growt...

Journal: :Applied and environmental microbiology 1991
P R Jensen R Dwight W Fenical

Actinomycetes were isolated from near-shore marine sediments collected at 15 island locations throughout the Bahamas. A total of 289 actinomycete colonies were observed, and all but 6 could be assigned to the suprageneric groups actinoplanetes and streptomycetes. A bimodal distribution in the actinomycete population in relation to depth was recorded, with the maximum numbers occurring in the sh...

2014
Radhakrishnan Manikkam Gopikrishnan Venugopal Balaji Subramaniam Balagurunathan Ramasamy Vanaja Kumar

Bioactive potential of actinomycetes isolated from certain less explored Indian ecosystems against Mycobacterium tuberculosis and other nonmycobacterial pathogens was investigated. Actinomycetes were isolated from the soil samples collected from desert, coffee plantation, rubber forest, and hill area and their cultural and micromorphological characteristics were studied. Crude extracts were pre...

Journal: :Polish journal of microbiology 2008
Hesham Abdulla Eric May Magdi Bahgat Ahmed Dewedar

Actinomycetes have been isolated from decayed and sound stone samples taken from a tomb site at Tell Basta, Zagazig City, Egypt. A total of 160 isolates have been characterised. The numbers and distribution of actinomycetes were studied during different seasons; during the winter months (18-20 degrees C), actinomycete numbers ranged from 10(3) to 10(4) cfu/g; in the summer (28-38 degrees C) low...

Journal: :Thorax 1991
J C Dalphin D Pernet G Reboux J Martinez A Dubiez T Barale A Depierre

Airborne contamination by thermophilic actinomycetes, micromycetes and Gram negative bacteria was determined on 34 dairy farms and related to fodder drying and storage methods. Eighteen farms had a barn drying system, eight with additional heating; the remaining 16 had traditional fodder storage methods. Three air samples were obtained for each farm with a six stage Andersen sampler. The thermo...

2013
Meera Kumari

Actinomycetes are a gram-positive, filamentous subgroup of bacteria most known for antibiotic production. In fact, most of the antibiotics available today have originated from actinomycetes, namely from the genus Streptomyces. Novel bacteria with antimicrobial activities have been discovered from bacterial screen studies for decades and there is still much more yet to be unearthed. One hundred ...

2014
Katherine Duncan Bradley Haltli Krista A. Gill Russell G. Kerr

Actinomycetes are an important resource for the discovery of natural products with therapeutic properties. Bioprospecting for actinomycetes typically proceeds without a priori knowledge of the bacterial diversity present in sampled habitats. In this study, we endeavored to determine if overall bacterial diversity in marine sediments, as determined by 16S rDNA amplicon pyrosequencing, could be c...

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