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Modulation of infusion processes to obtain coffee-derived food ingredients with distinct composition

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Abstract

Coffee infusion experiments were conducted to infer how operational variables (time, temperature, mass to volume ratio, and grinding) might affect the efficiency and/or selectivity of compounds extraction. Although the different variables have extensively been reported independently, to the best of our knowledge, no experimental design was yet delineated to study the simultaneous effect of variables in coffee composition. This study fulfills this gap by constructing surface models that reflect the responses in a wide-ranging design space. The freeze-dried extracts were compared regarding the overall yield of extraction, carbohydrate content and composition, caffeine, chlorogenic acid (5-CQA) content, color, and viscosity. Temperature was the major factor for coffee extracts differentiation, regarding both overall and carbohydrates yield and composition. The extraction process efficiency is more related to galactomannans extraction than arabinogalactans. Varying operational conditions, coffee extracts with distinct chemical properties are obtained from the same roasted coffee, broadening their applications in food formulations.

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Acknowledgements

Thanks are due to the University of Aveiro and FCT/MCT for the financial support for the QOPNA research Unit (FCT UID/QUI/00062/2019) through national founds and, where applicable, co-financed by the FEDER, within the PT2020 Partnership Agreement, and to the Portuguese NMR Network. Guido R. Lopes and Cláudia P. Passos were supported by individual doc (SFRH/BD/104855/2014) and post-doc (SFRH/BDP/107881/2015) grants by FCT, respectively.

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Authors and Affiliations

  1. QOPNA & LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal

    Guido R. Lopes, Cláudia P. Passos & Manuel A. Coimbra

  2. Diverge, Grupo Nabeiro Innovation Center, Alameda dos Oceanos 65, 1.1, 1990-208, Lisbon, Portugal

    Carla Rodrigues

  3. Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    José A. Teixeira

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  1. Guido R. Lopes
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  2. Cláudia P. Passos
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  3. Carla Rodrigues
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  4. José A. Teixeira
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  5. Manuel A. Coimbra
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Correspondence to Manuel A. Coimbra.

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Lopes, G.R., Passos, C.P., Rodrigues, C. et al. Modulation of infusion processes to obtain coffee-derived food ingredients with distinct composition. Eur Food Res Technol 245, 2133–2146 (2019). https://doi.org/10.1007/s00217-019-03318-9

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  • DOI: https://doi.org/10.1007/s00217-019-03318-9

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