Valorization of onion peel waste, considered to be a rich source of polyphenolic compounds, by employing green extraction techniques is the need of the hour. The aim of the present study was to optimize the microwave-assisted extraction of bioactive phenolic compounds from onion peel wastes employing ChCl:Urea:HO deep eutectic solvent. Microwave power (100-200-300 W), time (5-15-25 min) and liquid to solid ratio (40:1-50:1-60:1) were studied as the major parameters affecting the extraction efficiency. A Box-Behnken design was adopted including 17 experiments with five centre points. The optimum conditions determined were 100 W microwave power, 15.03 min irradiation time and 54.97 mL g liquid to solid ratio. Under the MAE optimized conditions, the recovery of TPC and FRAP were 80.45 (mg GAE g dw) and 636.18 (µmol AAE g dw), respectively. Morphology of onion peels before and after DES extraction were also studied to gain an insight in the effect of microwave irradiations on the biomass.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6706514 | PMC |
| http://dx.doi.org/10.1007/s13197-019-03891-7 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Synergistic Effects of Mannan Oligosaccharides and Onion Peels on In Vitro Batch Culture Fermentation of High Concentrate and Forage Diets.
Animals (Basel)
November 2024
Department of Animal Sciences, North Carolina Agricultural and Technical State University, 1601 East Market Street, Greensboro, NC 27411, USA.
The current study evaluated the effect of combining mannan oligosaccharide (MOS) and onion peel (OP) on ruminal in vitro total gas (GP), greenhouse gas emissions, dry matter and fiber fraction digestibility, partitioning factor (PF; mg degradable DM per mL gas), microbial mass, and volatile fatty acids using two dietary substrates: high forage (HF) and high concentrate (HC) diets. The study was arranged as a 2 × 2 × 6 factorial design with two dietary substrates, two time points (6 and 24 h), and six treatments. The treatments included a control group with no MOS or OP administration and groups administered with 2% of a mixture containing MOS and OP in the following ratios: 1:0 (MOS), 0:1 (OP), 1:1 (MOS:OP), 1:2 (MOS:2OP), and 1:3 (MOS:3OP).
View Article and Find Full Text PDFOnion Peel Extract Prevents Intestinal Inflammation via AMK-Activated Protein Kinase Activation in Caco-2/HT-29 Cells.
Nutrients
October 2024
Food and Nutritional Sciences, Department of Family and Consumer Sciences, North Carolina Agricultural and Technical State University, Greensboro, NC 27411, USA.
Background: Obesogenic diets cause intestinal inflammation and dysfunction. Polyphenols have shown a positive impact on reducing inflammation in in vitro studies. However, their bioactivity may not be the same in the in vivo system due to structural alteration by the gastrointestinal digestive process.
View Article and Find Full Text PDFNaringin-templated magnetic molecularly imprinted polymers for selective quercetin extraction from onion peel.
J Chromatogr B Analyt Technol Biomed Life Sci
November 2024
Process Development Laboratory (ASK1, #208), Department of Biotechnology, School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, India. Electronic address:
Article Synopsis
- A Magnetic Molecularly Imprinted Polymer (MMIP) was created using naringin as a template molecule and acrylamide as a functional monomer, utilizing ultrasound to enhance its ability to adsorb naringin.
- Surprisingly, the MMIP showed a stronger affinity for quercetin than for its intended target, naringin, leading to further studies on its adsorption properties and kinetics.
- The research led to a maximum adsorption capacity of 7.2 mg/g for quercetin and 4.9 mg/g for naringin, and quercetin was successfully quantified from onion peel waste using the MMIP combined with HPLC-UV technology.
Comparison of different green extraction methods used for the extraction of anthocyanin from red onion skin.
Food Sci Nutr
October 2024
Article Synopsis
- Green extraction focuses on creating energy-efficient techniques using safe, non-toxic solvents and sustainable resources to produce high-quality extracts.
- Red onion skin is a rich source of anthocyanins, which are beneficial natural pigments, but their instability limits their use in food and cosmetics.
- Various extraction methods showed that high hydrostatic pressure-assisted extraction (HHPAE) and supercritical fluid extraction (SFE) achieved the highest efficiency and anthocyanin concentrations, suggesting they can replace traditional methods effectively.
Preparation of Allium Cepa Peel Extract-mediated Silver Nanoparticles: A Hair Dye Formulation.
Zhongguo Ying Yong Sheng Li Xue Za Zhi
August 2024
Malla Reddy Institute of Pharmaceutical Sciences, Jawaharlal Nehru Technological University, Kompally, Hyderabad, Telangana, India.
The burgeoning field of nanotechnology has ushered in innovative Novel drug delivery systems (NDDS) that enhance the efficacy, safety, and patient compliance of pharmaceutical treatments. This study explores the synthesis and application of silver nanoparticles (AgNPs) using green chemistry approaches, specifically leveraging plant extracts as reducing agents. AgNPs, known for their unique physical and chemical properties, including antimicrobial capabilities, offer significant potential in modern drug delivery.
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!