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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"Streptomycetes"”.
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Two Antifungal Agents From Streptomycetes
Made available in DSpace on 2014-12-05T20:30:16Z (GMT). No. of bitstreams: 1 6305079.pdf: 3650897 bytes, checksum: d89c27c886778daabd3d0023e1aa05ae (MD5) Previous issue date: 1963
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Mechanisms of resistance to β-lactam antibiotics in Streptomycetes
… use to become resistant is of crucial need. Streptomycetes are Gram positive bacteria, commonly found in soil and are known antibiotic-producers. The focus of this thesis was to underpin the mechanism of resistance to penicillin G in isolated strains of streptomycetes that exhibit elevated …
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Characterization of inducible antibiotic production by streptomycetes isolated from hyper-arid environments
Antimicrobial resistance is a major threat to the future of human society with 10 million deaths projected in 2050. However, the search for new antimicrobials faces a setback in the rediscovery of the already known antibiotics. One strategy to mitigate this problem is the study of isolates from …
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The Growth of Streptomycetes and Fungi Under Controlled Conditions on the Surface of Coated Materials
… factors, moisture availability and the action of Streptomycetes (particularly Streptomyces spp. ), which might lead to variability. Present methods for controlling and monitoring relative humidity in the laboratory had disadvantages, and so novel methods for producing and measuring such …
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Quantification and characterization of the Streptomyces complex causing common scab of potatoes in South Africa
… related species. A diverse range of other Streptomycetes, similar in morphology and physiology to Streptomyces scabiei (Lambert & Loria), were frequently isolated during this study from common scab lesions. Most Streptomycetes isolated from common scab lesions were S. scabiei or …
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The role of actinomycetes in the biodeterioration of wood
… stages of its decay in soil (95% of these were streptomycetes). These numbers indicated a significant actinomycete presence in wood at least in spore form and actinomycete biomass in wood may be greater than is indicated by these figures.<br/>Streptomycete interactions with wood decay fungi were …
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The Laccase from Micromonospora sp.044 30-1 as a biocatalyst for synthesis of antioxidant compounds
… isolates, of which 2 strains were fungi, 7 were streptomycetes, and 5 were non-streptomycetes, representing the rare actinomycete genera Gordonia, Rhodococcus, Mycobacterium, Amycolatopsis, and Micromonospora were screened. This is the first report of laccase production in these species. A …
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Taxonomic problems associated with named strains of Streptomyces cinnamonensis
… Project (ISP) for identifying and classifying streptomycetes. Additional information was obtained by analysis of the amino acids and carbohydrates present both in whole cells and in isolated cell walls. The organisms included in the study were Streptomyces cinnamonensis, ATCC strains 15413 and …
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Biophysical analysis of MarR family transcription factors from Streptomyces coelicolor
Streptomycetes represent a rich source of potentially useful therapeutics. However, in a laboratory environment, a large proportion of their secondary metabolite gene clusters remain silent, and thus their full metabolic potential is not realised. One way to unlock these so-called "cryptic" …
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The role of phospholipids in the growth and development of Streptomyces
… changes that take place in the PL profile of streptomycetes during development, but changes in cardiolipin levels appeared to show the greatest fluctuations.
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Regulatory intricacies that confer temporal control of conjugation and antibiotic production functions in Streptomyces: new variations on old themes
The complex life style of streptomycetes requires that the appropriate program of genes be expressed at the appropriate times. For example, conjugation occurs solely within the substrate mycelium stage of development while antibiotic production occurs in the aerial mycelium. Thus, complex …
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Investigating the genome complexity of Streptomyces clavuligerus
… sharing identical telomeric sequences. Streptomycetes telomeres are maintained by the terminal proteins Tap and Tpg, however, while copies of the genes encoding these proteins were identified in pSCL4, pSCL3 and pSCL2, the chromosome carries none, making these the only known essential …
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Isolation of novel antibiotic producing microorganisms from invertebrates
… invertebrates using media designed to isolate streptomycetes. Identification by PCR and sequencing of 16S and 18S rRNA showed that the majority were in fact fungi, mainly Penicillium spp. and only 5 were Streptomyces spp. Three strains isolated from Helix aspersa (ES1), Lumbriculus variegate …
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Total Synthesis of CPI-2081, Breitfussin B and Synthetic Studies Towards Myriastramide C and Goadsporin
… Goadsporin was found to be active specially in streptomycetes, with the ability to promote morphogenesis and secondary metabolism. It can also promote antibiotic production. The synthesis of this natural product was challenging, and I I unfortunately with the limited time of my PhD study, we did …
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Glucan metabolism in mycobacterium and streptomyces
… α-Glucans have also been isolated in a number of streptomycetes, which are distant relatives of mycobacteria. In this study Streptomyces venezuelae was used to show for the first time that the GlgE pathway is responsible for glucan synthesis in vivo, as was predicted by the annotations in the …
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