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Enzymatic browning in fresh extra virgin olive oil (EVOO): Detection of polyphenol oxidase, assessing moisture impact, and revealing the anti-browning capacity of EVOO.
Food Chem
December 2024
Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Josef-Holaubek-Platz 2, 1090 Wien, Austria. Electronic address:
This study investigates the presence of active olive polyphenol oxidase (OePPO) in freshly extracted extra virgin olive oil (EVOO) and its role in triggering enzymatic browning during EVOO storage. OePPO's presence in EVOO was validated through its distinct molecular weights observed in SDS-PAGE gels. The generation of quinones in EVOO was tracked spectrophotometrically over a storage period of one month, revealing browning reactions, particularly in the early days of storage, followed by a decline concurrent with water sedimentation.
View Article and Find Full Text PDFEnhancing Waterproof Food Packaging with Janus Structure: Lotus Leaf Biomimicry and Polyphenol Particle Technology for Vegetable Preservation.
ACS Appl Mater Interfaces
January 2025
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
With the increasing demand for improved food preservation, conventional waterproof food packaging has proven inadequate because of its limited functionality. Although incorporating features such as antibacterial and antioxidant properties into packaging enhances protection, it can compromise the hydrophobicity of the involved material, thereby increasing the risk of contamination from external sources. To address this challenge, a robust and reliable barrier capable of simultaneously integrating multiple protective functions is required.
View Article and Find Full Text PDFKonjac glucomannan/zein active film loaded with tea polyphenol-ferric nanoparticles for strawberry preservation.
Int J Biol Macromol
January 2025
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address:
With increasing global environmental awareness and concerns about food safety, biodegradable active packaging has garnered widespread attention. In this study, the stability and bioactivity of tea polyphenol (TP) were enhanced through the preparation of TP-ferric nanoparticles (TP-Fe NPs) using metal-polyphenol ion coordination. Moreover, the introduction of Fe ions can further enhance the antibacterial effects of TP-Fe NPs.
View Article and Find Full Text PDFComparative toxicity of copper and zinc contaminated wastewater irrigation on growth, physiology, and mineral absorption of wheat.
Water Environ Res
January 2025
Agrobiology Laboratory, Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry (LAMMC), Lithuania.
A comparative pot study was performed to assess the toxic effects of copper (Cu) and/or zinc (Zn) contaminated wastewater (WW) irrigation on the growth, physiology, and element concentration of wheat grown for two months. The treatments included irrigation with uncontaminated wastewater (WW) as control, Cu-contaminated WW (CuWW), Zn-contaminated WW (ZnWW), and Cu + Zn contaminated WW (CuZnWW) in a completely randomized design. Compared to ZnWW, irrigation with CuWW or CuZnWW had severe effects on growth, physiology, and mineral absorption by wheat.
View Article and Find Full Text PDFThe role of photooxidation and organic matter in Cr(III) and Cr(VI) interactions with poly(lactic acid) microplastics in aqueous solution.
Sci Total Environ
February 2025
Department of Chemistry, Physics, Environmental and Soil Sciences, University of Lleida - AGROTECNIO-CERCA Center, Rovira Roure 191, 25198 Lleida, Spain.
There is limited research on the influence of environmental variables on the interactions of biodegradable microplastics with chromium. This study reports the results of adsorption experiments with Cr and poly(lactic acid) (PLA) in synthetic aqueous solutions. It addresses the influence of the initial oxidation state, Cr(III) or Cr(VI), the effects of UV irradiation and the presence of organic matter.
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