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Total 2 records

      Extraction of Anthocyanins and Total Phenolics from Dried Red Grape Skin by Super Heated Solvent and Production of NanoPparticle by Super Critical Fluid

      , M.Sc. Thesis Sharif University of Technology Shahmahmoodi, Mohammad (Author) ; Goodarznia, Iraj (Supervisor)
      Abstract
      Red grape skin has a lot of antioxidant that called Anthocyanins. In this research this material has been studied and amount of extraction of them have been studied by changing the operational parameter and particle size in taguchi procedure. Pressurized liquid extraction (PLE) was used to extract Anthocyanins from Dried Red Grape Skin (DRGS) with acidified Ethanol solvent (1 %( v/v) of HCl) in 90-120°C, 10-40 bar, and 30 min extraction time. In this study, effect of particle size distribution of DRGS was considered and the results showed that with increasing the temperature (from 90 to 120 °C in 10 °C increments) and decreasing the pressure and particle size the extraction of Anthocyanins... 

      Fabrication and Evaluation of Active and Intelligent Food Packaging Films Based on Natural Polymers Containing Silica Nanoparticles, Quantum Dots, and Plant Extracts

      , Ph.D. Dissertation Sharif University of Technology Bagri, Fatemeh (Author) ; Pircheraghi, Gholamreza (Supervisor) ; Imani, Mohammad (Supervisor) ; Whan Rhim, Jong (Co-Supervisor) ; Douraghi, Masoumeh (Co-Supervisor)
      Abstract
      Growing global concerns about the safety and environmental impact of synthetic plastics have accelerated the search for natural and biodegradable alternatives in food packaging. This study focused on the design and evaluation of multifunctional, active, and intelligent packaging films based on biopolymers incorporated with functionalized nanoparticles and natural bioactive compounds. In the first stage, silica nanoparticles obtained from rice husk (SiNPs) were loaded with oak extract (OE) and integrated into quince seed mucilage/alginate (QSM/Alg) films. The nanocomposite films containing 5 wt% OE@SiNP exhibited excellent antioxidant activity (100% in ABTS and 40.9% in DPPH assays), strong... 
    Total 2 records