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Using prodigiosin against some gram-positive and gram-negative bacteria and Trypanosoma cruzi J. Venom. Anim. Toxins incl. Trop. Dis.
Herráez,Rocío; Mur,Anna; Merlos,Alexandra; Viñas,Miguel; Vinuesa,Teresa.
Abstract Background: This work aimed to explore the action of natural prodigiosin on both bacterial organisms and Trypanosoma cruzi cells. Methods: Natural prodigiosin pigment was extracted and purified from cultures of Serratia marcescens. Two media, peanut broth and peptone glycerol broth, both recommended in the literature for prodigiosin production, were compared. The prodigiosin obtained was employed to explore its antimicrobial properties against both bacteria and Trypanosoma cruzi cells. Results: Peanut broth yielded four times more prodigiosin. The prodigiosin showed remarkable activity (minimal inhibitory concentrations in the range of 2-8 µM for bacteria and half maximal inhibitory concentration of 0.6 µM for Trypanosoma cruzi). In fact, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trypanosoma cruzi; Chagas disease; Prodigiosin; Atomic force microscopy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992019000100314
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Surface, thermal and hemocompatible properties of novel single stage electrospun nanocomposites comprising polyurethane blended with bio oilTM Anais da ABC (AABC)
AYYAR,MANIKANDAN; MANI,MOHAN PRASATH; JAGANATHAN,SARAVANA KUMAR; RATHINASAMY,RAJASEKAR; KHUDZARI,AHMAD ZAHRAN; KRISHNASAMY,NAVANEETHA PANDIYARAJ.
ABSTRACT In this work, the physicochemical and blood compatibility properties of prepared PU/Bio oil nanocomposites were investigated. Scanning electron microscope (SEM) studies revealed the reduction of mean fiber diameter (709 ± 211 nm) compared to the pristine PU (969 nm ± 217 nm). Fourier transform infrared spectroscopy (FTIR) analysis exposed the characteristic peaks of pristine PU. Composite peak intensities were decreased insinuating the interaction of the bio oilTM with the PU. Contact angle analysis portrayed the hydrophobic nature of the fabricated patch compared to pristine PU. Thermal gravimetric analysis (TGA) depicted the better thermal stability of the novel nanocomposite patch and its different thermal behavior in contrast with the pristine...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polyurethane; Bio oilTM; Nanocomposite; Atomic force microscopy; Wound healing.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502411
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Evaluation of ultraviolet radiation to control microorganisms adhering to low-density polyethylene films BJM
Silva,Cleuber Antonio de Sá; Andrade,Nélio José de; Soares,Nilda de Fátima Ferreira; Ferreira,Sukarno Olavo.
Efficiency of ultraviolet (UV) radiation in reducing the cell number of Staphylococcus aureus ATCC 25923 and Escherichia coli K-12 adhered to low-density polyethylene (LDPE) films was evaluated. The microorganisms were let to adhere to the surface of LPDE bags for 12h at 18ºC, and then submitted to UV radiation at an intensity 196 µW.cm-2, 254nm, for 2 seconds. Staphylococcus aureus was less resistant to UV radiation than E. coli, and the efficiency increased with the increase of the concentration of microbial suspension. After 1500 hours of use the UV radiation intensity of the lamp was reduced from 288 to 78 µW.cm-2, and the higher decrease occurred in the first 100 hours of use. Also, the efficiency of the UV radiation decreased after 1500 hours of use....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial adhesion; Ultraviolet radiation; Low-density polyethylene; Atomic force microscopy.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000200017
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In vitro biological activities of silver nanoparticles synthesized from Scedosporium sp. isolated from soil BJPS
Panchangam,Rajeeva Lochana; Upputuri,Ravi Theaj Prakash.
One of the important fields in nanotechnology is the development of an environment friendly method for the synthesis of nanoparticles. Many approaches show that microorganisms are the most reliable tools for biosynthesis of nanoparticles compared to physical and chemical methods. In our study, fungi have been exploited for extracellular production of metal nanoparticles. It was observed that in Scedosporium, silver ions are reduced to silver nanoparticles, which was confirmed by UV-visible spectrophotometry and AFM. Optimization studies showed that as the concentration of AgNO3 used for synthesis increased, particles’ size also increased. Size of the particles at different concentrations of AgNO3 was observed to be 79-107 nm with particles being...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atomic force microscopy; In vitro cytotoxicity; Scedosporium sp; Silver nanoparticles; UV-visible spectroscopy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100577
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