FRCH - I+D+i - GIDTAP::Artículos en revistas

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/6151

Browse

Author: search.filters.author.Dellatorre, Fernando Gaspar

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Photosensitizing role of R-phycoerythrin red protein and ß-carboline alkaloids in Dye sensitized solar cell. Electrochemical and spectroscopic characterization
    (2019-11-13) Yañuk, Juan G.; Cabrerizo, Franco M.; Dellatorre, Fernando Gaspar; Cerdá, María F.
    Dye-sensitized solar cell (DSSC) technology represents a valuable source for renewable energy production. Although with a rather low conversion efficiency, the continuous improvement of the price/performance ratio is making this technology more competitive than other sources of electrical power generation. To date, one of the major challenges is the search of novel and low-cost photosensitizers, a key player in the overall photo-conversion process. Natural dyes have shown to be an excellent alternative that still needs to be further explored. In this work, the spectroscopic and electrochemical properties of two different families of naturally occurring pigments (i.e, ß-carboline alkaloids (ßCs) and the red protein R-phycoerythrin (R-PE)) as well as their role in DSSCs are addressed. DSSC assemblies show that R-PE represents a highly suitable photosensitizer showing quite a high stability with a relative high solar energy to electricity conversion efficiency (n=0.11%) when comparing with other recombinant proteins (n=0.30%). Algae extracts used without further purification showed herein the highest efficiencies. The latter fact has a concomitant positive effect on the overall production cost of these photovoltaic cells. Surprisingly, and despite their positive effect on the coating of the semiconductor surface, the use of ßCs as additive decreases the overall conversion efficiency of the R-PE based DSSCs evaluated. Data support the hypothesis these alkaloids would be blocking the incident UVB/UVA radiation.
  • Thumbnail Image
    Item
    Seaweed resources of Argentina (S W Atlantic) : production, bio-ecological, applied research and challenges for sustainable development
    (British Phycological Society, 2022-10-13) Raffo, María Paula; Dellatorre, Fernando Gaspar; Ciancia, Marina
    Argentina comprises more than 5000 km of coastline with a considerable diversity of seaweeds, some of which have the potential to be transformed into fishery resources. However, when compared with other marine resources, the exploitation of the seaweed species in terms of the harvesting methods, their sustainability and available information on biological and ecological features, as well as their potential applications, is scarce or outdated. In this context, this review includes an integrated analysis of production statistics of selected seaweeds in Argentina. In addition, an extensive revision of taxonomic, bio-ecological, environmental and applied issues involving Argentinean seaweed resources is provided. Furthermore, we include novel information about the changes in resource availability which occurred during the last 20 years and their consequent impacts on the seaweed industry. The Argentinean seaweed industry developed raw materials biomass production in the 1960s and extraction of phycocolloids in the 1970s which dropped to very low levels to the present. Information here presented contributes directly to the UN SDG Goal 14: Life below water, providing a theoretical framework to understand how and which of the global change drivers affect sustainability of marine resources. Additionally, a detailed review is presented on phycocolloids from Argentinean seaweed resources. Actions are proposed that would contribute to the enhanced sustainable development in Argentina. The review suggests that reactivation of an Argentinean seaweed industry requires an update of legal frameworks, regarding exploitation of Argentinean seaweeds together with the necessary developments of science and industry.