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Objective: This study aimed to qualitatively study the main chemical components of apple peel in APORT, Kazakhstan, by ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS) and to compare the components of apple peels with different provenances.
Methods: An ACQUITY UPLC HSS T3 (100 mm × 2.1 mm, 1.8 μm) column was used with 0.1% formic acid water (A)-acetonitrile (B) as the mobile phase and gradient elution at a flow rate of 0.2 mL/min and a column temperature of 40°C. Mass spectrometry analysis was performed using the ESI positive and negative ion modes to acquire the data.
Results: With the Mass Lynx 4.2 workstation, online database, retention time of chromatographic peaks of each compound, and secondary fragmentation law, 14 compounds were identified from APORT apple peel extraction samples for the first time, and the main component categories included flavonols, organic acids, dihydrochalcones, terpenes, flavanols, etc., and caffeic acid, crataegolic acid, quinine acid, and quercitrin were found to be unique in APORT apple peel.
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http://dx.doi.org/10.1002/pca.3504 | DOI Listing |
Plant Sci
September 2025
College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China.
Branched-chain amino acid aminotransferases (BCATs) catalyze both the final anabolic step and the initial catabolic step of branched-chain amino acids (BCAAs), which are pivotal for the formation of plant branched-chain volatiles (BCVs). However, the members of BCAT family in apple (Malus domestica Borkh.) remain poorly characterized.
View Article and Find Full Text PDFAntioxidants (Basel)
July 2025
Department of Medical, Movement, and Wellbeing Sciences (DiSMMeB), Parthenope University of Naples, 80133 Naples, Italy.
This study explores the sustainable valorization of apple by-products by examining the polyphenolic content and antioxidant activity of peel, flesh, and core at two ripening stages. Ripening significantly enhanced the concentration of bioactive compounds, particularly in the peel, where total polyphenols increased from 124.4 to 423.
View Article and Find Full Text PDFFoods
July 2025
"Ion Ionescu de la Brad" Iasi University of Life Sciences, 3 Mihail Sadoveanu, Alley, 700490 Iasi, Romania.
Beetroot peel, an underutilised by-product of the food industry, has significant potential for valorisation due to its high content of bioactive compounds and natural pigments. This study aimed to sustainably reintroduce beetroot peel into the food chain by enriching the nutritional value of dehydrated apple snacks. Five experimental formulations of apple slices were developed: dipped in 5% RBPP in water, dipped in 10% RBPP in water, dipped in 5% RBPP in 50% lemon juice, dipped in 10% RBPP in 50% lemon juice all seasoned with cinnamon powder, and a control formulation.
View Article and Find Full Text PDFFood Chem
November 2025
Eskisehir Osmangazi University, Faculty of Science, Department of Physics, 26040 Eskisehir, Turkey.
A rapid and non-destructive Surface-Enhanced Raman Spectroscopy (SERS) approach using silver flowers (AgFws) as a substrate was successfully developed for the detection of trace amounts of thiram, a dithiocarbamate fungicide. In this study, we report the facile preparation of AgFws on a copper-coated polyethylene terephthalate (PET) substrate utilizing a "complexation-triggered crystallization" phenomenon. The 2,5-di(pyridin-4-yl)thiazolo[5,4-d]thiazole (PyTTz) dye serves as both a reducing agent and a nucleation site for the crystallization of silver ions, forming AgFws on the copper layer, thereby yielding a flexible SERS substrate.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
January 2026
School of Physical Science and Technology, Nantong University, Nantong, Jiangsu 226019, China. Electronic address:
Performance optimization and functionality expansion of surface-enhanced Raman scattering (SERS) substrates are the main challenges towards their practical applications. Targeting the urgent need for rapid detection of trace pesticide residues in food safety monitoring, a reusable and highly sensitive SERS substrate based on soft polyamide (PA) fabric was developed. Dense ripple-like nanostructures, proven to significantly enhance SERS performance, were successfully created on the interwoven PA fibers through oxygen plasma (OP) treatment.
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