Grape byproducts were subjected to an extraction process under various different experimental conditions (namely, solvent type, temperature, solvent-to-solid ratio, time contact, and raw material) in order to study the effect of these conditions on the yield of phenolic compounds and the corresponding antiradical activity of extracts. Although the order of decreasing capacity to extract soluble materials was ethanol > methanol > water, methanol was the most selective for extracting phenolic compounds. Temperature and solvent-to-solid ratio were found to have a critical role in extraction efficiency; values of 50 degrees C (between 25 and 50 degrees C) and 1:1 (between 1:1 and 5:1) maximized the antiradical activity of phenolic extracts. In addition, extracts from grape samples previously subjected to distillation reached higher antiradical values in comparison to those coming directly from pressing; in both cases, seed extracts showed better results than those of stem when ethanol or water was employed, whereas the opposite occurred in the case of methanol. These differences were attributed to the different phenolic compositions of the considered fractions.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jf0488110 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of Thermal Treatment on the Extraction and Antioxidant and Antiglycation Activities of (Poly)phenols from .
Molecules
January 2025
Department of Food Biofunctionality (140b), Institute of Nutritional Sciences, University of Hohenheim, D-70599 Stuttgart, Germany.
Phenolic compounds have antiglycation activity, but the changes occurring during thermal treatment (TT) in these activities are not completely understood. The effects of the extraction conditions of (poly)phenols from fruits, before and after TT, on their antioxidant and antiglycation effects were assessed. (Poly)phenol-enriched extracts (PEEs) from raw and TT (90 °C, 1 h) were extracted using three solvent mixtures (ethanol/water/acetic acid) with increasing water content (0, 24, and 49%) and three solvent-to-solid ratios (5, 10, and 20 mL/g).
View Article and Find Full Text PDFPectin Microwave Assisted Extraction from Pumpkin Peels: Process Optimization and Chemical-Physical and Rheological Characterization.
Foods
October 2024
Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy.
Article Synopsis
- The study explores the use of pumpkin peels as a new source of eco-friendly pectin, utilizing a microwave-assisted extraction method with citric acid-acidified water.
- Researchers optimized extraction conditions to achieve a pectin yield of 18.05%, finding high methoxyl content that classifies it as high methoxyl pectin, which has applications as a stabilizer and emulsifying agent.
- The findings highlight the potential of utilizing agricultural waste for producing valuable polysaccharides, promoting sustainable practices and waste valorization in various industries.
Sustainable ferritin from bovine by-product liver as a potential resource: Ultrasound assisted extraction and physicochemical, structural, functional, and stable analysis.
Int J Biol Macromol
November 2024
College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China. Electronic address:
Article Synopsis
- Ferritin is an important protein for regulating iron metabolism in organisms and can be extracted from animal by-products for use in a circular economy.
- A new method for extracting bovine liver ferritin (BLFer) using ultrasound-assisted techniques yields a higher output (32.18 g/kg) compared to traditional methods, while also enhancing structural stability.
- The study finds that BLFer is a stable, hydrophilic protein that is crucial for iron management and has potential applications in food and other industries, promoting better use of animal by-products.
Optimization of Extraction Conditions for Biological Attributes of Newly Developed NARC-G1 Garlic Using Response Surface Methodology and Its GC-MS Characterization.
Chem Biodivers
October 2024
University of Sargodha, Sargodha, 40100, Pakistan.
The present paper is a comprehensive study on the optimization of ultrasonic assisted extraction and characterization of valued components from the newly developed garlic cultivar NARC-G1. The response surface methodology was employed to optimize the extraction time, solvent-to-solid ratio and extraction temperature, for optimal total phenolic contents (TPC), DPPH radical scavenging activity, α-amylase inhibition, and α-glucosidase inhibition. Under the optimized conditions (23 min extraction time, 60 °C temperature, and 39 : 1 solvent-to-solute ratio) the optimal TPC (13.
View Article and Find Full Text PDFOptimization of Phenolic-Enriched Extracts from Olive Leaves via Ball Milling-Assisted Extraction Using Response Surface Methodology.
Molecules
August 2024
Research and Development Department, Shanghai Chicmax Cosmetic Co., Ltd., 38th Floor, Global Harbor Tower B, No. 3300 North Zhongshan Road, Putuo District, Shanghai 200065, China.
This study aims to extract phenolic-enriched compounds, specifically oleuropein, luteoloside, and hydroxytyrosol, from olive leaves using ball milling-assisted extraction (BMAE). Response surface methodology (RSM) and the Box-Behnken design (BBD) were used to evaluate the effects of the temperature, solvent-to-solid ratio, and milling speed on extraction recovery. The contents of the extract were determined by ultra-high-performance liquid chromatography-mass spectrometry (UPLC-MS) and converted to recoveries to evaluate the extraction efficiency.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!