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  • 1
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    Application of Essential Oils in Food Systems (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-03-28
    Description: This Special Issue will look at the advances made in the essential oils. Essential oils have received increasing attention as natural additives for the shelf-life extension of food products, due to the risk in using synthetic preservatives. Synthetic additives can reduce food spoilage, but the present generation is very health conscious and believes in natural products rather than synthetic ones due to their potential toxicity and other concerns. Therefore, one of the major emerging technologies is the extraction of essential oils from several plant organs and their application to foods. Essential oils are a good source of several bioactive compounds, which possess antioxidative and antimicrobial properties, so their use can be very useful to extend the food shelf-life. Although essential oils have been shown to be promising alternative to chemical preservatives, they present special limitations that must be solved before their application in food systems. Low water solubility, high volatility and strong odor are the main properties that make it difficult for food applications. Recent advances refer to new forms of application to avoid these problems are currently under study. Their application into packaging materials and coated films but also directly into the food matrix as emulsions, nanoemulsions, coated and others are some of their new applications.
    Keywords: TX341-641 ; Preservatives ; Essential oils ; Foods ; thema EDItEUR::J Society and Social Sciences::JB Society and culture: general::JBC Cultural and media studies::JBCC Cultural studies::JBCC4 Cultural studies: food and society
    Language: English
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  • 2
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    Wavefield analysis of volcanic tremor during the 2021 eruption of La Palma, Canary Islands, using multiple seismic arrays (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-03
    Description: The 2021 Tajogaite eruption in La Palma, Canary Islands, was accompanied by strong volcanic tremor. In September 2021, during the first two weeks of eruption, we deployed two small-aperture seismic arrays. We chose two locations around Montaña Caldero and Llano del Jable, located about 4 km SE and 2 km NE of the eruption site. The arrays were composed of 1 three-component and 9 vertical-component short-period seismometers, sampled at 100 sps by a 12-channel data acquisition system. In each array, the receivers were spread with an aperture of about 400 m. Although they operated intermittently due to failures in the power supply related to ash fall, they provided long time series of multichannel seismic data that allow for the characterization of the syn-eruptive tremor. The analysis of the recorded wavefields reveals a persistent tremor source linked to the activity of the eruptive vents. The main component of the wavefield in the 1-3 Hz frequency band propagates with apparent slowness around 1 s/km, impinging on the arrays from directions of ~300 and 260ºN, respectively. These directions are slightly deviated from the active vents azimuths, a fact that we attribute to propagation effects produced by the topography and heterogeneous velocity structure. Subtle variations in the apparent slowness and propagation azimuths are investigated using the relative slowness estimate method, that allows for a precise determination of the apparent slowness vectors.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 3
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    On the intriguing subject of the small amplitudes of magnetic anomalies at the Powell Basin (Antarctica) (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-19
    Description: The Powell Basin is a small oceanic basin bounded by continental blocks that fragmented during drifting of South America from Antarctica. The basin is limited to the east by the South Orkney Microcontinent, to the north by the South Scotia Ridge, and to the west by the Antarctic Peninsula. The timing of its opening is poorly constrained due to low amplitude magnetic anomalies which hampers their identification and cause large uncertainties in proposed ages that range from the Late Eocene to Early Miocene. The Powell basin has been extensively studied using a variety of geophysical methods including seismic, gravity and magnetic surveys intended to unveil the tectonic domains. The magnetic anomalies and the thermal regime of the basin are of particular interest, as some of these studies have suggested that the absence of clear seafloor magnetic anomalies is the result of impermeable layers that prevent the venting of hot fluids into the water column. Using new magnetic and heat flow data together with geophysical data from international databases, we analyze the thermal structure of the Powell Basin its lithosphere and the upper mantle dynamics and discuss the probable causes of the abnormally small amplitudes of magnetic anomalies.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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