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Registros recuperados: 24 | |
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Alberton,Luiz Romulo; Vandenberghe,Luciana Porto de Souza; Assmann,Ricardo; Fendrich,Ricardo Cancio; Rodriguéz-León,José; Soccol,Carlos Ricardo. |
The study of xylanase production was conducted by Streptomyces viridosporus T7A in submerged (SmF) and solid-state fermentation (SSF), using agro-industrial residues and sub-products. Napier grass, sugarcane bagasse and soybean bran were used as carbon source, substrate/support, and nitrogen source, respectively. In SmF, Napier grass (1% v/w) supplemented with soybean bran, hydroxyethylcellulose and B complex vitamins were used. Soybean bran (1.5 % w/v), B complex vitamins (0.1%), and hydroxyethilcellulose (0.15%) led to an increase in xylanase production (23.41 U/mL). In SSF, the effects of the following parameters were studied: substrate composition (sugarcane bagasse, Napier grass and soybean bran), initial moisture, and inoculum rate. In SSF, the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptomyces; Xylanase; Submerged fermentation; Solid-state agro-industrial fermentation; Residues. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700022 |
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Chanthasena,Panjamaphon; Nantapong,Nawarat. |
The increasing use of antibiotics has led to the development of drug-resistant microorganisms. The emergence of resistant strains has compromised the treatment and control of infectious diseases. As a result, the search and development of a novel class of antibiotic drugs are required. Actinomycetes have been recognized as a richest source of secondary metabolites including antibiotics. The aim of this study was to investigate the diversity of antibiotic-producing soil Actinomycetes from dry dipterocarp forest in Northeast of Thailand. The soil from this area has been known for its poor in nutrients and highly acidic with pH values around 4.5. In such a harsh condition, soil-inhabiting Actinomycetes elevate their protective mechanisms by inducing the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil bacteria; Antibiotics; Actinomycetes; Streptomyces. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100417 |
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Procópio,Rudi Emerson de Lima; Silva,Ingrid Reis da; Martins,Mayra Kassawara; Azevedo,João Lúcio de; Araújo,Janete Magali de. |
Streptomyces is a genus of Gram-positive bacteria that grows in various environments, and its shape resembles filamentous fungi. The morphological differentiation of Streptomyces involves the formation of a layer of hyphae that can differentiate into a chain of spores. The most interesting property of Streptomyces is the ability to produce bioactive secondary metabolites, such as antifungals, antivirals, antitumorals, anti-hypertensives, immunosuppressants, and especially antibiotics. The production of most antibiotics is species specific, and these secondary metabolites are important for Streptomyces species in order to compete with other microorganisms that come in contact, even within the same genre. Despite the success of the discovery of antibiotics,... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptomyces; Antibiotics; Resistance; Infection. |
Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000500011 |
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Santos,A.P.P.; Silva,M.D.S.; Costa,E.V.L.; Rufino,R.D.; Santos,V.A.; Ramos,C.S.; Sarubbo,L.A.; Porto,A.L.F.. |
Surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. Considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by Streptomyces sp. DPUA1559 isolated from lichens of the Amazon region. The microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. The kinetics of biosurfactant production was accompanied by reducing the surface tension of the culture medium from 60 to values around 27.14 mN/m, and by the emulsification index, which showed the efficiency of the biosurfactant as an emulsifier of hydrophobic compounds.... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biosurfactant; Surface tension; Emulsification; Streptomyces; Soybean frying oil. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000200606 |
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Ser,Hooi-Leng; Tan,Wen-Si; Ab Mutalib,Nurul-Syakima; Yin,Wai-Fong; Chan,Kok-Gan; Goh,Bey-Hing; Lee,Learn-Han. |
ABSTRACT As the largest genus in Actinobacteria family, Streptomyces species have the ability to synthesize numerous compounds of diverse structures with bioactivities. Streptomyces mangrovisoli MUSC 149T was previously isolated as a novel streptomycete from mangrove forest in east coast of Peninsular Malaysia. The high quality draft genome of MUSC 149T comprises 9,165,825 bp with G + C content of 72.5%. Through bioinformatics analysis, 21 gene clusters identified in the genome were associated with the production of bioactive secondary metabolites. The presence of these biosynthetic gene clusters in MUSC 149T suggests the potential exploitation of the strain for production of medically important compounds. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genome sequence; Streptomyces; Mangrove; AntiSMASH; Bioinformatics analysis. |
Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100013 |
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Melo,Ricardo Rodrigues de; Persinoti,Gabriela Felix; Paixão,Douglas Antonio Alvaredo; Squina,Fábio Márcio; Ruller,Roberto; Sato,Helia Harumi. |
ABSTRACT Here, we show the draft genome sequence of Streptomyces sp. F1, a strain isolated from soil with great potential for secretion of hydrolytic enzymes used to deconstruct cellulosic biomass. The draft genome assembly of Streptomyces sp. strain F1 has 69 contigs with a total genome size of 8,142,296 bp and G + C 72.65%. Preliminary genome analysis identified 175 proteins as Carbohydrate-Active Enzymes, being 85 glycoside hydrolases organized in 33 distinct families. This draft genome information provides new insights on the key genes encoding hydrolytic enzymes involved in biomass deconstruction employed by soil bacteria. |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Actinobacteria; Glycoside hydrolases; Streptomyces; Draft genome sequence; Soil bacteria. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000400612 |
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Abou-Dobara,M.I.; Omar,N.F.. |
Two mesophilic streptomycetes (S. violaceoruber and S. spiroverticillatus) were selected to study their Poly R-478 decolorization ability and lignocellulose solubilizing activity. Both strains were able to degrade Poly R-478 dye and ferulic acid during growth on a minimal salts medium. The Poly R-478 decolorizing activities of both strains were induced by adding different carbon sources to the culture media. S. violaceoruber could decolorize 63% of Poly R-478 after 24 h. Both strains could solubilize straw and produce acid-precipitable polymeric lignin (APPL) with different efficiency. From the major extracellular enzymes recovery of both strains on rice and wheat straw, we can predicate that the biodegradation process was partial indicating a possible... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Streptomyces; APPL; Poly-R decolorization; Ferulic acid degradation. |
Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400008 |
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山本, 紳朗; 佃, 祥江; 前田, 征之; 金子, 知央; 安井, 篤司; 美濃, 羊輔; YAMAMOTO, Shinro; TSUKUDA, Yoshie; MAEDA, Masayuki; KANEKO, Tomohisa; YASUI, Atsushi; MINO, Yosuke. |
http://www.obihiro.ac.jp/~library/kenkyu.html |
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Palavras-chave: 塩素; そうか病; 殺菌; Streptomyces; 電気分解; バレイショデンプン廃液. |
Ano: 1995 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3797 |
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Registros recuperados: 24 | |
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