Development of walnut dehulling machine and assessment of its performance using Ethephon and Tween-80 as pre-treatments for hull loosening.
A power- driven walnut dehulling machine was developed and tested. The machine was evaluated for dehulling after applying Ethephon and Tween-80 to green walnuts by dip and spray methods. The results showed that with the increase in dipping time and post dipping/spraying time, the effective throughput capacity, dehulling efficiency and fully dehulled walnut percentage increased, […]
Simultaneous determination of six mycotoxins in peanut by High-performance Liquid Chromatography with Fluorescence detector.
BACKGROUND: Mycotoxins, which may contaminate peanut and peanut products, are responsible for many diseases to human beings. AflatoxinB1(AFB1), aflatoxinG1(AFG1), aflatoxinB2(AFB2), aflatoxinG2(AFG2), ochratoxin A(OTA) and zearalenone(ZEN) are considered the most relevant groups of mycotoxins found in food. This work aimed to develop a high-performance liquid chromatography with fluorescence detector(HPLC-FLD) combined with dispersive liquid-liquid microextraction(DLLME) method for […]
Cross-linking of Peanut Allergen Ara h 2 by Polyphenol Oxidase: Digestibility and Potential Allergenicity Assessment
BACKGROUND: Peanut is one of the eight major food allergens. Its allergen, Ara h 2, can be recognized by over 90% of serum IgE samples from peanut-allergic patients. Therefore, reducing the allergenicity of Ara h 2 is especially important. RESULTS: In the present study, polyphenol oxidase (PPO), a protein cross-linking reaction catalyst that acts on […]
Physico-chemical properties, antioxidant activities and antihypertensive effects of walnut protein and its hydrolysate
BACKGROUND: Some food proteins hydrolysates are found to possess multiple health effects. In this study, walnut protein (WP) was enzymatically hydrolysed by alcalase and trypsin under optimal conditions. The physico-chemical properties, antioxidant and angiotensin-converting enzyme (ACE) inhibitory activities of WP, alcalase-generated walnut protein hydrolysate (AWPH) and trypsin-generated walnut protein hydrolysate (TWPH) were comparatively studied. Stability […]
Near-infrared spectrocopy is suitable for the classification of hazelnuts according to protected designation origin
BACKGROUND: This study investigates the possibility of using Near-Infrared spectroscopy for the authentication of the 'Nocciola Romana' hazelnut (Corylus avellana L. cvs. 'Tonda Gentile Romana' and 'Nocchione') as a protected designation of origin (PDO) hazelnut from Central Italy. Algorithms for the selection of the optimal pretreatments were tested in combination with the following discriminant routines: […]