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  • 1
    Book
    Book
    Dordrecht [u.a.] : Springer
    Keywords: Ocean-atmosphere interaction ; Carbon dioxide sinks ; Atmospheric carbon dioxide ; Chemical oceanography ; Aufsatzsammlung ; Meereskunde ; Atmosphäre ; Kohlenstoffgehalt
    Type of Medium: Book
    Pages: X, 176 S. , Ill., graph. Darst., Kt. , 235 mm x 155 mm
    ISBN: 9789048198207
    RVK:
    RVK:
    Language: English
    Note: Literaturangaben , Climate variability in the north-western Iberian peninsula during the last deglaciation / Filipa Naughton ... [et al.]Impact of Oporto Metropolitan Area carbon dioxide emissions over the adjacent coastal zone / Rogério Carvalho, Nelson Barros, and Pedro Duarte -- Present day carbon dioxide fluxes in the coastal ocean and possible feedbacks under global change / Alberto V. Borges -- Aspects of phytoplankton communities response to climate changes / Maria de Graça Cabeçadas ... [et al.] -- pH decrease and effects on the chemistry of seawater / Juana Magdalena Santana-Casiano and Melchor González-Dávila -- Effects of sediment acidification on the bioaccumulation of Zn in R. philippinarum / Inmaculada Riba ... [et al.] -- Contaminant cycling under climate change : evidences and scenarios / Carlos Vale ... [et al.] -- The use of weight of evidence for environmental quality assessment in sediments above sub-seabed geological formations for the storage of carbon dioxide / Tomás-Ángel Del Valls Casillas ... [et al.].
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  • 2
    Publication Date: 2014-11-19
    Description: Background: Essential oils (EO) obtained from twenty medicinal and aromatic plants were evaluated for their antimicrobial activity against the oral pathogens Candida albicans, Fusobacterium nucleatum, Porphyromonas gingivalis, Streptococcus sanguis and Streptococcus mitis. Methods: The antimicrobial activity of the EO was evaluates by microdilution method determining Minimal Inhibitory Concentration. Chemical analysis of the oils compounds was performed by Gas chromatography-mass spectrometry (CG-MS). The most active EO were also investigated as to their actions on the biolfilm formation. Results: The most of the essential oils (EO) presented moderate to strong antimicrobial activity against the oral pathogens (MIC - Minimal Inhibitory Concentrations values between 0.007 and 1.00 mg/mL). The essential oil from Coriandrum sativum inhibited all oral species with MIC values from 0.007 to 0.250 mg/mL, and MBC/MFC (Minimal Bactericidal /Fungicidal Concentrations) from 0.015 to 0.500 mg/mL. On the other hand the essential oil of C. articulatus inhibited 63.96% of S. sanguis biofilm formation. Through Scanning Eletronic Microscopy (SEM) images no changes were observed in cell morphology, despite a decrease in biofilm formation and changes on biofilm structure. Chemical analysis by Gas Chromatography - Mass Spectrometry (GC-MS) of the C. sativum essential oil revealed major compounds derivatives from alcohols and aldehydes, while Cyperus articulatus and Aloysia gratissima (EOs) presented mono and sesquiterpenes. Conclusions: In conclusion, the crude oil from C. articulatus exhibited the best results of antimicrobial activity e ability to control biofilm formation. The chemical analysis showed the presence of terpenes and monoterpenes such as a-pinene, a-bulnesene and copaene. The reduction of biofilms formation was confirmed from SEM images. The results of this research shows a great potential from the plants studied as new antimicrobial sources.
    Electronic ISSN: 1472-6882
    Topics: Medicine
    Published by BioMed Central
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