Foods
FEMSA Biotechnology Center, Tecnológico de Monterrey, School of Engineering and Sciences, Eugenio Garza Sada Ave. 2501, 64849 Monterrey, Mexico.
Published: July 2021
Pulsed electric fields (PEF) have been reported to increase the total oil extraction yield (OEY) of fresh pecan nuts maintaining oil characteristics and increasing phenolic compounds in the remaining by-product. However, there is no information regarding the PEF effect on dry pecan nuts. Dry kernels were pretreated at three specific energy inputs (0.8, 7.8 and 15.0 kJ/kg) and compared against untreated kernels and kernels soaked at 3, 20 and 35 min. OEY, kernels microstructure, oil stability (acidity, antioxidant capacity (AC), oil stability index, phytosterols and lipoxygenase activity), along with by-products phenolic compounds (total phenolics (TP), condensed tannins (CT)) and AC were evaluated. Untreated kernels yielded 88.7 ± 3.0%, whereas OEY of soaked and PEF-treated kernels were 76.5-83.0 and 79.8-85.0%, respectively. Kernels microstructural analysis evidenced that the 0.8 kJ/kg pretreatment induced oleosomes fusion, while no differences were observed in the stability of extracted oils. PEF applied at 0.8 kJ/kg also increased by-products CT by 27.0-43.5% and AC by 21.8-24.3% compared to soaked and untreated kernels. These results showed that PEF does not improve OEY when it is applied to dry pecan nuts, demonstrating that kernels' moisture, oil content and microstructure play an important role in the effectiveness of PEF.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8303311 | PMC |
http://dx.doi.org/10.3390/foods10071541 | DOI Listing |
Plant Dis
January 2025
USDA Agricultural Research Service, 9611 S. Riverbend Ave, Parlier, District of Columbia, United States, 93648;
Southern shagbark hickory (Carya carolinae-septentrionalis) is one of several deciduous trees in the family Juglandaceae and genus Carya that are native to North America. Southern shagbark hickory has a restricted distribution to the Southeast U.S.
View Article and Find Full Text PDFFood Chem
March 2025
Department of Biochemistry, Memorial University of Newfoundland, St. John 's, NL, Canada.
This article presents a comprehensive overview of upcycling commercial nut byproducts (such as Brazil nut, cashew, hazelnut, macadamia, peanut (also known as a legume), pecan, pine nut, pistachio, and walnut) for food, nutraceutical, and pharmaceutical applications. Upcycling nut byproducts, namely husk/hull, hard shell, brown skin, defatted flour/meal/cake, pine cone, cashew nut shell liquid, cashew apple, walnut septum, and dreg/okara, has great potential, not only to reduce/minimise waste, but also to fit within the circular economy concept. Each byproduct has its own unique functional properties, which can bring significant value.
View Article and Find Full Text PDFRapid Commun Mass Spectrom
December 2024
Department of Chemistry and Chemistry Education, Charles University, Prague, Czech Republic.
Plant Physiol Biochem
November 2024
State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, 311300, China. Electronic address:
Hickory (Carya cathayensis) nuts are rich in epigallocatechin-3-gallate (EGCG) with multiple health functions. EGCG also regulates plant growth, development and stress responses. However, research on the synthesis mechanism of EGCG and its function in hickory is currently limited.
View Article and Find Full Text PDFCrit Rev Food Sci Nutr
July 2024
Instituto Multidisciplinario de Biología Vegetal (IMBIV - CONICET). Facultad de Ciencias Exactas, Físicas y Naturales - Universidad Nacional de Córdoba (UNC), Córdoba, Argentina.
The health benefits of nut consumption have been extensively demonstrated in observational studies and intervention trials. Besides the high nutritional value, countless evidences show that incorporating nuts into the diet may contribute to health promotion and prevention of certain diseases. Such benefits have been mostly and certainly attributed not only to their richness in healthy lipids (plentiful in unsaturated fatty acids), but also to the presence of a vast array of phytochemicals, such as polar lipids, squalene, phytosterols, tocochromanols, and polyphenolic compounds.
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