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totarol/podocarpus
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10 resultados
A fluorescence study of the interaction and location of (+)-totarol, a diterpenoid bioactive molecule, in model membranes.
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(+)-Totarol, a diterpene extracted from Podocarpus totara, has been reported as a potent antioxidant and antibacterial agent. Although the molecular mechanism of action of this hydrophobic molecule remains unknown, recent work made in our laboratory strongly suggests that it could be lipid-mediated.
Mode of antibacterial action of totarol, a diterpene from Podocarpus nagi.
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The antimicrobial mechanism of totarol was studied using Pseudomonas aeruginosa IFO 3080. This diterpene inhibited oxygen consumption and respiratory-driven proton translocation in whole cells, and oxidation of NADH in membrane preparation. NADH-cytochrome c reductase was inhibited by totarol while
Antibacterial activity of totarol and its potentiation.
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Antimicrobial activity of six diterpenoids isolated from the bark of Podocarpus nagi (Podocarpaceae) has been tested against twelve selected microorganisms. Totarol [1], the most abundant compound among the six, exhibited potent bactericidal activity only against Gram-positive bacteria, among which
Effects of Ultrasound Treatment on Physiochemical Properties and Antimicrobial Activities of Whey Protein-Totarol Nanoparticles.
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Totarol is a natural antimicrobial compound extracted from the heartwood of Podocarpus totara, a conifer native to New Zealand. The effects of whey protein-totarol nanoparticles treated with ultrasound on the physiochemical properties and the growth of Staphylococcus aureus were investigated. The
Totarol prevents neuronal injury in vitro and ameliorates brain ischemic stroke: Potential roles of Akt activation and HO-1 induction.
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The natural product totarol, a phenolic diterpenoid and a major constituent isolated from the sap of Podocarpus totara, has been reported to have a potent antimicrobial activity. In this study, we determined whether totarol possessed an additional neuroprotective activity in vitro and in vivo. We
Antioxidative action of diterpenoids from Podocarpus nagi.
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Diterpenoids, totarol (1), totaradiol (2), 19-hydroxytotarol (3), totaral (4), 4 beta-carboxy-19-nortotarol (5), sugiol (6), isolated from Podocarpus nagi, were evaluated as antioxidants. Microsomal lipid peroxidation induced by Fe(III)-ADP/NADPH and mitochondrial lipid peroxidation induced by
Inhibition of lipid peroxidation by diterpenoid from Podocarpus nagi.
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A diterpenoid, totarol (1), from Podocarpus nagi was evaluated as an antioxidant. This diterpenoid inhibited autoxidation of linoleic acid. Mitochondrial and microsomal lipid peroxidation induced by Fe(III)-ADP/NADH or Fe(III)-ADP/NADPH were also inhibited. Nagilactone E (2), a norditerpene lactone
Antibacterial novel phenolic diterpenes from Podocarpus macrophyllus D. Don.
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Two new sempervirol type diterpenes, inumakiols A, B, and six new totarol type diterpenes, inumakiols C-H, were isolated from a methanolic extract of bark of Podocarpus macrophyllus (Podocarpaceae), along with one known abietane, two known totarol type diterpenes, and one known totarol type
Cytotoxic diterpenoids from Podocarpus madagascariensis from the Madagascar rainforest.
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Bioassay-directed fractionation of an extract of the root and bark of Podocarpus madagascariensis resulted in the isolation of a new totarol diterpenoid (1) in addition to the three known cytotoxic diterpenoids 19-hydroxytotarol (2), totaradiol (3), and 4beta-carboxy-19-nor-totarol (4). The
Development and in vitro characterization of poly(lactide-co-glycolide) microspheres loaded with an antibacterial natural drug for the treatment of long-term bacterial infections.
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Biodegradable polymers, especially poly(lactide-co-glycolide) (PLGA), have good biocompatibility and toxicological properties. In combination with active ingredients, a specialized drug delivery system can be generated. The aim of the present study was to develop a drug delivery system consisting of
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