Browsing by Subject "Volatile organic compounds"

Now showing 1 - 3 of 3
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    Assessing the impact of petrol stations on their immediate surroundings
    (Elsevier, 2010-08-09) Baeza Caracena, Antonia; Morales Terrés, Isabel M.; Doval Miñarro, Marta; González Ferradás, Enrique; Barberá Rico, Jonathan; Ingeniería Química
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    Chitosan induces salicylic acid and methyl salicylate in banana plants and reduces colonisation by Fusarium oxysporum f. sp. cubense TR4
    (Elsevier, 2025-02-06) Lopez Moya, Federico; Zorrilla Fontanesi, Yasmín; Lozano Soria, Ana; Ganado, Nadia Fernández de Larrinoa; Moreno González, Celia Mei; Hernández, Arnau; Torres, Ariadna; González Silvera, Daniel; Benet, Gunsé; López Jiménez, José Ángel; Lopez Llorca, Luis V.; Fisiología
    Banana (Musa spp.) cultivation is essential for food security; however, the clonality of commonly used forms renders them highly susceptible to pests and diseases. The wilt fungus Fusarium oxysporum f. sp. cubense Tropical Race 4 (FocTR4) threatens banana production worldwide. Chitosan induces salicylic acid (SA) and methyl salicylate (MeSA) production in banana plants and reduces colonisation by FocTR4. This polymer induces the main SA biosynthetic pathway mediated by isochorismate synthase 1 and phenylalanine ammonia-lyase. Chitosan also induces systemic acquired resistance genes, mainly flavin-dependent monooxygenase 1 (FMO1), in banana roots. The banana genotypes Petit Naine, Gros Michel, Enzirabahima, Yangambi Km5, and Foconah differ in their response to chitosan. In the Foc-resistant Yangambi Km5, chitosan induced an approximately 7-fold increase in FMO1. Preventive chitosan treatments together with the endophytic biocontrol fungus Pochonia chlamydosporia strain 123 reduced colonisation of banana roots by FocTR4 (approximately 4-fold). Therefore, chitosan and beneficial endophytes can help sustainably manage FocTR4 infection in bananas. We propose a novel method to induce local and systemic defences for biomanagement of banana pests and diseases.
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    Relationship between lung function and exhaled volatile organic compounds in healthy infants
    (Wiley-Blackwell, 2022-01-29) Sola‐Martínez, Rosa A.; Sánchez-Solís de Querol, Manuel; Lozano Terol, Gema; Gallego Jara, Julia; García-Marcos Álvarez, Luis Vicente; Cánovas Díaz, Manuel; Diego Puente, Teresa de; NELA Study Group; Cirugía, Pediatría y Obstetricia y Ginecología; Facultad de Medicina
    Objective: The aim of this study is to assess, for the first time, the relationship between the volatilome and lung function in healthy infants, which may be of help for the early detection of certain respiratory diseases. Lung function tests are crucial in chronic respiratory diseases diagnosis. Moreover, volatile organic compounds (VOCs) analysis in exhaled breath is a noninvasive technique that enables the monitorization of oxidative stress, typical of some forms of airway inflammation. Methods: Lung function was studied in 50 healthy infants of 3–8 months of age and the following parameters were obtained: forced vital capacity (FVC), forced ex piratory volume at 0.5 s (FEV0.5), forced expiratory flow at 75% of FVC (FEF75), forced expiratory flow at 25%–75% of FVC (FEF25–75), and FEV0.5/FVC. Lung function was measured according to the raised volume rapid thoracoabdominal compression technique. In addition, a targeted analysis of six endogenous VOCs (acetone, isoprene, decane, undecane, tetradecane, and pentadecane) in the exhaled breath of the children was carried out by means of thermal desorption coupled gas chromatography‐single quadrupole mass spectrometry system. Results: A negatively significant relationship has been observed between levels of acetone, tetradecane, and pentadecane in exhaled breath and several of the lung function parameters. Levels of acetone (feature m/z = 58) were significantly nega tively associated with FVC and FVE0.5, levels of tetradecane (feature m/z = 71) with FEV0.5, and levels of pentadecane (feature m/z = 71) with FEV0.5 and FEF25–75. Conclusion: The findings of this study highlight a significant association between VOCs related to oxidative stress and lung function in healthy infants.