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Screening biosurfactant-producing actinomycetes: Identification of Streptomyces sp. RP1 as a potent species for bioremediation.
J Basic Microbiol
April 2024
School of Biological Sciences, Universiti Sains Malaysia, USM, Pulau Pinang, Malaysia.
This study aimed to isolate biosurfactant-producing and hydrocarbon-degrading actinomycetes from different soils using glycerol-asparagine and starch-casein media with an antifungal agent. The glycerol-asparagine agar exhibited the highest number of actinomycetes, with a white, low-opacity medium supporting pigment production and high growth. Biosurfactant analyses, such as drop collapse, oil displacement, emulsification, tributyrin agar test, and surface tension measurement, were conducted.
View Article and Find Full Text PDFm4C DNA methylation regulates biosynthesis of daptomycin in L30.
Synth Syst Biotechnol
December 2022
Institute of Pharmaceutical Biotechnology, Zhejiang University School of Medicine, Hangzhou, 310058, PR China.
Despite numerous studies on transcriptional level regulation by single genes in drug producing , the global regulation based on epigenetic modification is not well explored. N4-methylcytosine (m4C), an abundant epigenetic marker in ' genome, but its regulatory mechanism remains unclear. In this study, we identify a m4C methyltransferase (SroLm3) in L30 and multi-omics studies were performed and revealed SroLm3 as a global regulator of secondary metabolism.
View Article and Find Full Text PDFBlack staining: an overview for the general dental practitioner.
Br Dent J
June 2022
Professor and Consultant in Paediatric Dentistry, University of Manchester, UK.
'Black stain' is a form of extrinsic staining affecting the buccal and palatal surfaces of primary and permanent teeth. It presents as an incomplete line of dark dots formed at the cervical third of the tooth, typically following the gingival margin and not extending to the proximal areas. There is no consensus on its prevalence, though it appears to vary between 2-20%, with an equal male and female distribution.
View Article and Find Full Text PDFCharacterization of Bioactive Actinomycetes Isolated from Kadolkele Mangrove Sediments, Sri Lanka.
Pol J Microbiol
June 2022
Department of Microbiology, Faculty of Science, University of Kelaniya, Kelaniya Sri Lanka.
Exploring untapped microbial potentials in previously uncharted environments has become crucial in discovering novel secondary metabolites and enzymes for biotechnological applications. Among prokaryotes, actinomycetes are well recognized for producing a vast range of secondary metabolites and extracellular enzymes. In the present study, we have used surface sediments from 'Kadolkele' mangrove ecosystem located in the Negombo lagoon area, Sri Lanka, to isolate actinomycetes with bioactive potentials.
View Article and Find Full Text PDFForeign Bodies in Sinonasal Tissues: A Potential Pitfall yet a Hint to Oroantral Fistulas.
Int J Surg Pathol
May 2023
Oral and Dental Surgery Unit, Rashid Hospital, Dubai, United Arab Emirates.
Foreign bodies in the maxillary sinus are infrequent findings with various organic and inorganic materials have been reported. Most are iatrogenic due to abnormal communications between the oral cavity and the sinus cavity, predominantly secondary to dental and oral procedures. Oroantral fistulas might be asymptomatic incidental findings or may present with sinusitis-related symptoms.
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