Edible nuts deliver polyphenols and their transformation products to the large intestine: An in vitro fermentation model combining targeted/untargeted metabolomics.

The fate of polyphenols from edible tree nuts was investigated using a simulated in vitro intestinal fermentation system. The digested food matrix was fermented for 48 h and the changes in the phenolic profiles were evaluated by both untargeted UHPLC-QTOF and targeted UHPLC-Orbitrap mass spectrometry. The untargeted metabolomics approach allowed us to monitor the comprehensive changes […]

Comprehensive study of phenolic compounds profile and antioxidant activity of eight pistachio cultivars, their residual cakes and virgin oils.

Phenolic compounds of eight pistachio (Pistacia vera L.) cultivars, their residual cakes and virgin oils (screw pressing) were studied using HPLC-DAD-ESI-MS/MS. A total of 25 compounds were identified and quantified for pistachio nuts and residual cakes, being reported for the first time the presence of five flavonols, five six flavanols and one gallotannin. Total phenolics in […]

HR‐LC‐ESI‐Orbitrap‐MS based metabolite profiling of Prunus dulcis Mill. (Italian cultivars Toritto and Avola) husks and evaluation of antioxidant activity.

INTRODUCTION: Prunus dulcis Mill. is a plant cultivated for the production of its edible seeds, known as sweet almonds. In the last decades almond demand has highly increased due to their wide use in the industrial manufacturing of almond-based foods; this has led to a huge production of waste materials, mainly corresponding to shells and […]

RNA-Seq Reveals Flavonoid Biosynthesis-related Genes in Pecan (Carya illinoinensis) Kernels.

Pecan (Carya illinoinensis) is an important nut tree in the world. The high concentration of flavonoid in its kernels makes it an excellent healthy food. However, the molecular basis of flavonoid biosynthesis in pecan remains unclear, which hinders quality breeding in this plant. Therefore, in order to obtain crucial genes involved in flavonoid biosynthesis, the changes […]

Process Optimization for Improved Phenolic Compounds Recovery from Walnut (Juglans regia L.) Septum: Phytochemical Profile and Biological Activities.

Plant by-products can be valuable sources of polyphenol bioactive compounds. Walnut (Juglans regia L.) is a very important tree nut rich in biologically active molecules, but its septum was scarcely researched. Experimental data indicated a hypoglycemic effect of septum extracts, with almost no details about its phytochemical composition. The main objectives of this study were: (1) to […]

Metabolic syndrome, Mediterranean diet, and polyphenols: Evidence and perspectives.

Metabolic syndrome (MetS) is defined as the co-occurrence of metabolic risk factors that includes insulin resistance, hyperinsulinemia, impaired glucose tolerance, type 2 diabetes mellitus, dyslipidemia, and visceral obesity. The clinical significance of MetS consists of identifying a subgroup of patients sharing a common physiopathological state predisposing to chronic diseases. Clinical and scientific studies pinpoint lifestyle […]

Effect of hulling methods and roasting treatment on phenolic compounds and physicochemical properties of cultivars ‘Ohadi’and ‘Uzun’pistachios (Pistacia vera L.).

The aim of this study was to identify phenolic compounds and measure the physicochemical properties of two pistachio (Pistacia vera L.) cultivars ('Uzun' and 'Ohadi'). For this purpose, the pistachios were subjected to four different hulling methods (wet hulling-WT, brine hulling-BR, wet-dry hulling-WD, and dry-dry hulling-DD) and a standard roasting treatment. Phenolic compounds were analyzed by HPLC-DAD-ESI-MSn. Twelve […]

Effect of drying methods on nut quality of hazelnuts (Corylus avellana L.).

This study was conducted to determine the effects of hazelnut drying machine (DM1 and DM2; at 45 °C and 50 °C, respectively) and sun-drying (concrete ground and grass ground) methods on the chemical properties of Tombul, Palaz, and Ordu Levant hazelnuts. For this purpose, protein, lipid and moisture content, water activity, free fatty acid (FFA), […]

Effect of micro-encapsulated antioxidant formulations on mycobiota, residual levels, sensory analyses and insect pest attack in stored peanuts.

The in situ effect of microencapsulated 2(3)-tert-butyl-4 hydroxyanisole (BHA) on stored peanuts (Arachis hipogaea) intended for human consumption was evaluated. Peanut were stored unshelled in flexible containers called "big bags" that were made of polypropylene raffia. 100 kg of peanuts were used in each big bag and stored in refrigerated cells (<18 °C) for about 5 months in two different peanut processing companies […]