Influence of processing steps on phenolic composition of clarified and unclarified pomegranate juices as characterized by LC-DAD-ESI-MS/MS

In this study, quality parameters of clarified (CPJ) and unclarified pomegranate juices (UPJ) of “Hicaz” variety (obtained from industrial-scale fruit juice production plant) were investigated regarding general compositions (sugar, organic acid, color parameters, etc.), phenolic content and also antioxidant capacity. The predominant anthocyanin was detected as cyanidin-3,5-diglucoside followed by cyanidin-3-glucoside, delphinidin-3,5-diglucoside, delphinidin-3-glucoside, pelargonidin-3-glucoside, cyanidin pentoxide, pelargonidin-3,5-diglucoside. Cyanidin pentoxide was detected for the first time in this study in pomegranate juices in Turkey. During production, a decrease was observed in anthocyanins up to 39%. Fourteen colorless phenolic compounds were identified as primary ellagic acid, punicalagin-?, and punicalagin-ß. The most significant decrement in phenolic compounds was observed in clarification/filtration steps of CPJ and separation step of UPJ while an increase was detected after pressing. However, the reduction of phenolic content of CPJ was higher than UPJ during production. This decrease was probably related to the effect of clarification agents, filtration, and evaporation processes. Practical applications: Pomegranate juices have high nutritional value and health benefits with its rich content of phenolic compounds. Processing steps of unclarified and clarified pomegranate juices production could lead to differences in phenolic compounds and other bioactive properties. This study contributes valuable information for industrial production of pomegranate juices. © 2019 Wiley Periodicals, Inc.This research was made possible through the financial support from the Adana Alparslan T?rke??Science and Technology University by means of the thesis project, LTP-17332002. The authors acknowledge Goknur Food Company, Kozan for providing pomegranate juices

Active packaging films based on polyolefins modified by organic and inorganic nanoparticles

Nowadays, the use of polymer films for flexible packaging has gained a widespread importance because of their easy processing, good final properties, light weight and low relative cost. In order to fulfill the needs of increasingly demanding consumers respect to the quality of packaged products, additional capabilities must be incorporated into packaging. In this sense, academic and industrial efforts have focused on new technologies that provide a complementary functionality to the packaging performance. These emerging developments involve active and intelligent packaging, which can attract to consumers, improve product quality and/or balance any detrimental effect. In this context, the use of nanoparticle (NP) modified polyolefins, either in bulk (nanocomposites) or on the surface, allows the inclusion of specific functionalities. These new capabilities enable obtaining active packaging according to the requirements of the product. The aim of this chapter is to analyze the aforementioned approaches for the development of active films by incorporating antibacterial, antifungal and/or repellent functionalities. Currently, several sustainable developments of this type of active films are based on commodity thermoplastics such as poly(ethylene) and poly(propylene). These materials, modified by the incorporation of organic and inorganic NPs, are promising candidates since their final properties can be tailored for packaging application.Fil: Alonso, Yanela Natalin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaFil: Grafia, Ana Luisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaFil: Castillo, Luciana Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; ArgentinaFil: Barbosa, Silvia Elena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentin