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Walnuts are high in protein content and rich in nutrients and are susceptible to oxidation during production and processing, leading to a decrease in the stability of walnut protein emulsions. In this paper, the effect of alkyl peroxyl radical oxidation on the stability of walnut protein emulsions is investigated. With the increase of 2,2-azobis (2-methylpropionamidine) dihydrochloride (AAPH) concentration, both its protein and fat were oxidized to different degrees, and the droplets of the emulsion were first dispersed and then aggregated as seen from the laser confocal, and the stability of walnut protein emulsion was best at the AAPH concentration of 0.2 mmol/L. In addition to this, the adsorption rate of adsorbed proteins showed a decreasing and then an increasing trend with the increase in the oxidized concentration. The results showed that moderate oxidation (AAPH concentration: 0-0.2 mmol/L) promoted an increase in protein flexibility and a decrease in the protein interfacial tension, leading to the decrease in emulsion droplet size and the increase of walnut protein emulsion stability, and excessive oxidation (AAPH concentration: 1-25 mmmol/L) weakened protein flexibility and electrostatic repulsion, making the walnut protein emulsion less stable. The results of this study provide theoretical references for the quality control of walnut protein emulsions.
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http://dx.doi.org/10.3390/foods13101513 | DOI Listing |
Phytomedicine
August 2025
Laboratory of Neurological Disease Modeling and Translational Research, West China Hospital, Sichuan University, Chengdu, 610041, China. Electronic address:
Background: Stress is a prevalent mental health concern that often emerges in late adolescence or early adulthood. Since 2007, the Food and Drug Administration (FDA) has not approved any novel anxiolytic pharmaceuticals, leading to increased interest in nutritional supplements as alternative therapies for stress management.
Purpose: Building on our previous study, this work aims to investigate the synergistic effects of Theanine (Th) and Walnut Peptide (WP) on stress mitigation and cognitive enhancement.
Int J Food Microbiol
August 2025
School of Food and Health, Beijing Technology and Business University (BTBU), Beijing 100048, China. Electronic address:
Walnut meal (WM), a protein-rich byproduct of oil extraction, holds great potential for conversion into value-added food products but remains underutilized. In this study, a two-stage fermentation process involving Aspergillus oryzae inoculation for koji preparation followed by natural brine fermentation was developed to produce a peptide-enriched walnut meal paste (WMP). Physicochemical analysis showed significant increases in total acidity (0.
View Article and Find Full Text PDFAppl Biochem Biotechnol
September 2025
Bursa Technical University Central Research Laboratory, 16310, Bursa, Türkiye.
Acetylcholinesterase (AChE) is a cholinergic enzyme called acetylcholine acetylhydrolase. Acetylcholinesterase inhibition is one of the prominent methods in studies on pest control management. In this study, AChE was purified 103.
View Article and Find Full Text PDFClin Nutr
August 2025
The Health & Nutrition Innovative International Research Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, David Ben-Gurion Blvd. 1, Beer-Sheva, 8410501, Israel; Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG), Helmholtz Zentrum München, University of
Background And Aims: We explored whether changes in serum proteomic profiles differed between participants with distinct brain aging trajectories, and whether these changes were influenced by dietary intervention.
Methods: In this secondary analysis of the 18-month DIRECT PLUS trial, 294 participants were randomized to one of three arms: 1) Healthy dietary guidelines (HDG); 2) Mediterranean (MED) diet (+440 mg/day polyphenols from walnuts); or 3) low red/processed meat green-MED diet (+1240 mg/day polyphenols from walnuts, Mankai plant, and green tea). We measured 87 serum proteins (Olink-CVDII).
Molecules
August 2025
Department of Food Analysis and Evaluation of Food Quality, University of Agriculture in Krakow, Balicka 122, 30-149 Krakow, Poland.
The study aimed to produce semolina pasta enriched with walnut or hazelnut oil cake and to investigate its nutritional and technological properties. The pasta was prepared by substituting 10% of semolina with walnut or hazelnut oil cakes. The chemical composition, antioxidant properties, and culinary characteristics of the pasta were determined.
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