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Antibacterial neurymenolides from the Fijian red alga Neurymenia fraxinifolia.
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Two novel alpha-pyrone macrolides, neurymenolides A (1) and B (2), were isolated from the Fijian red alga Neurymenia fraxinifolia and characterized using a combination of NMR and mass spectral analyses. These molecules represent only the second example of alpha-pyrone macrolides, with 1 existing as
Antibacterial activity of hydrolyzed red blood cells in vitro.
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Antibacterial bromophenols from the marine red alga Rhodomela confervoides.
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Two bromophenols, together with three known compounds, were isolated from the methanolic extract of the marine alga, Rhodomela confervoides. By means of MS and NMR spectroscopic analyses, they were identified as 3-bromo-4-[2,3-dibromo-4,5-dihydroxyphenyl] methyl-5-(hydroxymethyl) 1,2-benzenediol (1)
Antibacterial activity of red and white wine against oral streptococci.
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Wine contains a number of biologically active compounds with beneficial effects on human health. The antibacterial action of commercial red and white wines against oral streptococci responsible for caries development and against S. pyogenes responsible for pharyngitis was studied. Its postcontact
Antibacterial activity of chitosan/collagen membranes containing red propolis extract.
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In this study we developed a mucoadhesive polymeric membrane wound dressing incorporating red propolis extract (HERP). Membranes were made using a casting method employing collagen, chitosan, polyethylene glycol (15, 20, and 30v%), and hydroethanolic extract of EtOH-H₂O 70v% - 30v% (v/v) of HERP
Antibacterial effect of the red sea soft coral Sarcophyton trocheliophorum.
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The marine soft corals Sarcophyton trocheliophorum crude extracts possessed antimicrobial activity towards pathogenic bacterial strains, i.e. Bacillus cereus, Salmonella typhi, Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Bioassay-guided fractionation indicated that the
Antibacterial activity of hemocyanin from red swamp crayfish (Procambarus clarkii).
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Hemocyanins (HMC): the copper-containing respiratory proteins present in invertebrate hemolymph, which plays many essential roles in the immune system. Currently, little is known about the HMC domains of Procambarus clarkii (P. clarkii) and their function in antimicrobial immune response. In this
Bactericidal effect of malachite green and red laser on Actinobacillus actinomycetemcomitans.
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The aim of this study was to investigate the ability of malachite green (MG) combined with a low-power red laser to kill Actinobacillus actinomycetemcomitans and to investigate MG photodegradation after photodynamic therapy (PDT) by optical absorption spectroscopy. The etiology of periodontal
In vitro antibacterial activity of Chilean red wines against Helicobacter pylori.
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The antibacterial activity of sixteen Chilean red wines (Cabernet Sauvignon, Cabernet Merlot, Cabernet Organic and Pinot Noir), and the active extracts of two randomly selected wines were assayed for their antibacterial activity on six strains of Helicobacter pylori isolated from gastric biopsies.
Red luminescent manganese-doped zinc sulphide nanocrystals and their antibacterial study.
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Water soluble, uniform-sized ZnS:Mn2+ nanocrystals (NCs) have been prepared using a simple co-precipitation method with a methanol and water binary mixture as a reaction medium. The structure of the prepared ZnS:Mn2+ NCs is cubic with a mean size distribution of 3-5 nm.
Photocontrol of Antibacterial Activity: Shifting from UV to Red Light Activation.
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The field of photopharmacology aims to introduce smart drugs that, through the incorporation of molecular photoswitches, allow for the remote spatial and temporal control of bioactivity by light. This concept could be particularly beneficial in the treatment of bacterial infections, by reducing the
Brominated diterpenes with antibacterial activity from the red alga Sphaerococcus coronopifolius.
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Four new brominated diterpenes (1, 2, 4, 5), along with two previously reported metabolites (3, 6), were isolated from the organic extract of Sphaerococcus coronopifolius, collected in Palaiokastritsa Bay at the west coast of Corfu Island. The structures of the new products, as well as their
Bromophenolics from the Red Alga Polysiphonia decipiens.
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The isolation and the structure determination of a new bromophenolic compound, polysiphonol (10), as well as five previously reported compounds, (4-8), from the red alga Polysiphonia decipiens is reported. In addition, the absolute configuration of the natural product
Brazilian red propolis: Chemical composition and antibacterial activity determined using bioguided fractionation.
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The indiscriminate use of antibiotics is causing an increase in bacterial resistance, complicating therapeutic planning. In this context, natural products have emerged as major providers of bioactive compounds. This work performs a bioguided study of Brazilian red propolis to identify compounds with
Retraction: Red luminescent manganese-doped zinc sulphide nanocrystals and their antibacterial study.
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Retraction of 'Red luminescent manganese-doped zinc sulphide nanocrystals and their antibacterial study' by Prashant K. Singh et al., J. Mater. Chem. B, 2014, 2, 522-528.
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