Cite us: Teslić, N., Pojić, M., Stupar, A., Mandić, A., Pavlić, B., Mišan, A. (2025) PhInd—Database on Polyphenol Content in Agri-Food By-Products and Waste: Features of the Database. Antioxidants, 13, 97. https://doi.org/10.3390/antiox13010097
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DOI: https://doi.org/10.1016/j.fct.2020.111189

Year: 2020

Source:

Latin Name: Juglans regia L.
Common Name: Walnut
Cultivar/variety: N.A.
Class: Nut
Part: Hull/Husk
Origin: Portugal
Industry: Nut processing
Industrial process step:
Scale: Laboratory
Number of Lots: 1
Number of Replicates Within One Lot: 6
Moisture Content: N.A.

Pretreatment:

Sample: Pretreated
Defatting: No
Drying: Oven drying
Thermal/Non Thermal: No
Particle Size: ˂400 µm

Extraction:

Technique: Solid-liquid extraction
Solvent: Aqueous ethanol,Ethanol
Hydrolysis: No

Total Phenols Content:

Unit: N.A.
TPspectrophotometric: N.A.
TPhplc: 13.94
Unit: mg/g extract

Individual compounds

Polyphenol class

Individual Compounds:

Phenolic Acids / Derivatives Content STD Flavonoids / Derivatives Content STD Stilbenes / Derivatives Content STD Lignans Content STD Other Content STD
3-p-Coumaroylquinic acid 1.07000 0.03000 Quercetin 3-O-glucoside 0.32550 0.00030 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
4-p-Coumaroylquinic acid 1.35600 0.00100 Quercetin O-hexoside 0.26500 0.00500 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
Dihydroxytetralone galloyl-hexoside isomer 2.80000 0.10000 Quercetin O-pentoside 0.38220 0.00030 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
Dihydroxytetralone galloyl-hexoside isomer 1.48600 0.00300 Quercetin O-deoxyhexoside 0.32100 0.00100 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
Trihydroxytetralone galloyl-hexoside 1.23000 0.04000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
Trihydroxynaphthalene galloyl-hexoside 4.70000 0.30000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
∑TPHPLC: 13.9357