Development of a multiplex real-time PCR for determination of apricot in marzipan using the PLEXOR® System.
Marzipan is a confectionary which is mostly offered in form of filled chocolate, pralines or pure. According to the German guidelines for oil seeds only almonds, sugar and water are admitted ingredients of marzipan. A product very similar in taste is persipan which is used in the confectionary industry because of its stronger flavor. For […]
Identification and Characterization of Ana o 3 Modifications on Arginine Residue-111 in Heated Cashew Nuts.
Raw and roasted cashew nut extracts were evaluated for protein modifications by mass-spectrometry. Independent modifications on the Arg-111 residue of Ana o 3 were observed in roasted but not raw cashew nuts. The mass changes of 72.0064 or 53.9529 Da are consistent with formation of carboxyethyl and hydroimidazolone modifications at the Arg-111 residue. These same […]
Maillard Reaction and Caramelization during Hazelnut Roasting: A multiresponse kinetic study
A comprehensive kinetic model indicating the elementary steps of Maillard reaction and caramelization during hazelnut roasting was proposed based on a multi-response kinetic modeling approach. Changes in the concentrations of sucrose, fructose, glucose, amino acids, 3-deoxyglucosone, 1-deoxyglucosone, 3,4-dideoxyglucosone, glyoxal, methylglyoxal, dimethylglyoxal, and 5-hydroxymethylfurfural were examined in hazelnuts during roasting at 150, 160 and 170°C for […]
Physico-chemical characteristics and fungal profile of four Saudi fresh date (Phoenix dactylifera L.) cultivars.
Physico-chemical and microbial analyses of four commercial fresh date cultivars (Sukari, Barhi, Khalas and Rothana) grown in Saudi Arabia were evaluated. Colorimetric assay indicated that Sukari had the highest total sugar content of 13.21g/100gFW while the lowest was in Rothana with 7.96g/100gFW. Total phenolic content (TPC) ranged from 76.74 to 122.20mgGAE/100gFW in Barhi and Rothana […]
Effects of Sulfur Dioxide Concentration on Organic Acids and β-Carotene in Dried Apricots During Storage.
The effects of various sulfur dioxide (SO2) concentrations (0, 451, 832, 1594, 2112 and 3241mg/kg) on the profiles and contents of organic acids (OAs) and β-carotene in sulfured dried apricots (SDAs) were investigated during storage at 4, 20 and 30°C for 379days. In all samples, four OAs [malic acid (MA), citric acid (CA), succinic acid […]
Food processing and structure impact the metabolizable energy of almonds.
The measured metabolizable energy (ME) of whole almonds has been shown to be less than predicted by Atwater factors. However, data are lacking on the effects of processing (roasting, chopping or grinding) on the ME of almonds. A 5-period randomized, crossover study in healthy individuals (n = 18) was conducted to measure the ME of […]
Determination of acrylamide in dried fruits and edible seeds using QuEChERS extraction and LC separation with MS detection.
Acrylamide is a carcinogenic and neurotoxic process contaminant that is generated from food components during heat treatment, while it is absent in raw foodstuffs. Its level in food arouses great concern. A method for acrylamide extraction and determination in dried fruits (dried prunes and raisins) and edible seeds (almonds, hazelnuts, peanuts, pine nuts, pistachios, and […]
New model for colour kinetics of plum under infrared vacuum condition and microwave drying
Background. Quality of dried foods is affected by the drying method and physiochemical changes in tissue. The drying method affects properties such as colour. The colour of processed food is one of the most important quality indices and plays a determinant role in consumer acceptability of food materials and the processing method. The colour of […]
Discrimination of almonds (Prunus dulcis) geographical origin by minerals and fatty acids profiling.
Twenty-one almond samples from three different geographical origins (Sicily, Spain and California) were investigated by determining minerals and fatty acids compositions. Data were used to discriminate by chemometry almond origin by linear discriminant analysis. With respect to previous PCA profiling studies, this work provides a simpler analytical protocol for the identification of almonds geographical origin. […]
Food Targeting: Geographical origin determination of hazelnuts (Corylus avellana) by LC-QqQ-MS/MS based targeted metabolomics application.
A targeted metabolomics LC-ESI-QqQ-MS application for geographical origin discrimination based on 20 non-polar key metabolites was developed, validated according to accepted guidelines and used for quantitation via stable isotope labeled internal standards in 202 raw authentic hazelnut samples from six countries (Turkey, Italy, Georgia, Spain, France and Germany) out of harvest years 2014 and 2015. […]