Abstract
Nowadays, acorns, the fruits of Quercus trees, are mostly associated with animal feed. However they are part of the traditional gastronomical folklore of several Mediterranean countries. Though several uses can be mentioned, one of the most common uses is powdering the acorns in order to produce a flour that can substitute regular corn flour in the manufacture breads and cakes. An example of this is acorn bread, a typical Portuguese loaf. However, to the best of our knowledge, there is no information about the nutritional value of these flours. As such, the main goal of this work was to describe the nutritional value of acorn flours from two different subspecies of Quercus abundant in Portugal (Quercus ilex and Quercus rotundifolia) obtained using two different traditional methods (drying and roasting). The results demonstrated that all flours possessed interesting nutritional properties, namely the absence of gluten and elevated values of both monounsaturated and polyunsaturated fatty acids. Because of these facts and it’s low production cost, acorn flour poses as an interesting alternative to traditional flours particularly for gluten intolerant individuals.
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References
E. Cantos et al., J. Agric. Food. Chemistry 51(21), 6248–6255 (2003)
S.E. Gesundheitsamt, C.f.d.m.s.d.d. alimentaires, Manuel suisse des denrées alimentaires: méthodes d’analyse et d’appréciation des denrées alimentaires et des objets usuels (Office central fédéral des imprimés et du matériel, 1969)
AOAC, Official Methods of Analysis of AOAC International: Revision 1, 18th edn. (AOAC International, Arlington, 2006)
International Standard, Food and Feed Products—General Guidelines for the Determination of Nitrogen by the Kjeldahl Method. ISO 1871 (International Organization for Standardization, 2009)
I.P.d. Qualidade, Frutos, produtos hortículas e seus derivados, in Determinação dos açúcares totais, dos açúcares redutores e dos açúcares não redutores (sacarose). (Lisboa Codex, Lisbon, 1987)
I.P.d. Qualidade, Farinhas de Trigo, in Determinação do teor de gluten seco (Lisboa Codex, Lisbon, 1984)
Z. Cohen, A. Vonshak, A. Richmond, J. Phycol. 24(3), 328–332 (1988)
D. Firestone, The official methods and recommended practices of the American Oil Chemists’ Society III (American Oil Chemists’ Society, Champaign, 1994)
M.I. Ferraz de Oliveira, M. Machado, M. Cancela d’Abreu, Acorn chemical composition depending on shedding date and Quercus species, in ed. by E.J. De Pedro, A.B. Cabezas. 7th International Symposium on the Mediterranean Pig (CIHEAM, Zaragoza, 2012) pp. 229–234
R. Nieto et al., Livest. Prod. Science. 77, 2–3 (2002)
V. Rodríguez-Estévez, A. García, A.G. Gómez, Livest. Sci. 122, 2–3 (2009)
W.D. Grant, Philos. Trans. R. Soc. Lond. B 359, 1249–1267 (2004)
S.A. Aherne, N.M. O’Brien, Nutrition 18(1), 75–81 (2002)
R.V. da Mota et al., Starch Stärke. 52, 2–3 (2000)
T. Galliard, J. Sci. Food Agric. 24(5), 617–622 (1973)
C. Catassi et al., Ann. Med. 42(7), 530–538 (2010)
L.E. van Riemsdijk et al., J. Cereal Sci. 53(3), 355–361 (2011)
A.-S. Hager et al., Eur. Food Res. Technol. 235(2), 333–344 (2012)
S. Groves, Native Nations Cookbook: East Coast (Author Solutions, Bloomington, 2011)
L. Beck, G. Nashat, Women in Iran from 1800 to the Islamic Republic (University of Illinois Press, Champaign, 2004)
D. Cathey, A Culinary History of Pittsburg County: Little Italy, Choctaw Beer and Lamb Fries (History Press, Stroud, 2013)
R. Kuktaite, H. Larsson, E. Johansson, J. Cereal Sci. 40(1), 31–39 (2004)
J.W. Anderson et al., Nutr. Rev. 67(4), 188–205 (2009)
D. Kromhout et al., Eur. Heart J. 33(4), 436–443 (2012)
A.I. Rey et al., Meat Sci. 73(1), 66–74 (2006)
M.G. Bernardo-Gil et al., J. Supercrit. Fluids 40(3), 344–348 (2007)
C. Alasalvar, E. Pelvan, B. Topal, Int. J. Food Sci. Nutr. 61(6), 630–642 (2010)
N.W. Chang, P.C. Huang, Atherosclerosis 142(1), 185–191 (1999)
K.C. Hayes et al., Am. J. Clin. Nutr. 53(2), 491–498 (1991)
C.M. Williams, Ann. Zootech. 49(3), 165–180 (2000)
M.J. Kang et al., Br. J. Nutr. 94(4), 544–550 (2005)
C.L. Huang, B.E. Sumpio, J. Am. Coll. Surg. 207(3), 407–416 (2008)
Z. Šramková, E. Gregová, E. Šturdík, Acta Chim. Slovaca 2(1), 115–138 (2009)
D. Sabanis, C. Tzia, Food Bioprocess Technol. 2(1), 68–79 (2009)
A. Angioloni, C. Collar, J. Cereal Sci. 56(3), 713–719 (2012)
I.V. Vrček et al., Food Chemistry. 143, 522–529 (2014)
Acknowledgments
The authors would like to acknowledge the project Pest-PE/EQB/LA0016/2013 granted by FCT for the funding provided and Herdade do Freixo do Meio (Montemor-o-Novo, Portugal) for providing the acorns used. Additionally the authors S. Silva and E.M. Costa would like to acknowledge FCT for their Ph.D. grants, references SFRH/BD/90867/2012 and SFRH/BDE/103957/2014 respectively.
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Silva, S., Costa, E.M., Borges, A. et al. Nutritional characterization of acorn flour (a traditional component of the Mediterranean gastronomical folklore). Food Measure 10, 584–588 (2016). https://doi.org/10.1007/s11694-016-9340-1
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DOI: https://doi.org/10.1007/s11694-016-9340-1