A Comprehensive Review on the Chemical Constituents and Functional Uses of Walnut (Juglans spp.) Husk

This review aims to discuss the recent scientific literature regarding the importance of the walnut, including the different parts of its fruit, with more emphasis on the husk, the antioxidant and antiradical activities of walnut husk extract, and the isolated and identified chemical constituents of walnut husk, as well as provide further details

Jahanban-Esfahlan; Ostadrahimi; Tabibiazar; Amarowicz

2019

Scholarcy highlights

  • In recent years, plant-based materials, and especially nuts, have received much consideration and interest
  • The authors achieved the maximum sorption at pH 4.0, and the results indicated that the Langmuir isotherm was the appropriate model for describing the obtained data for the adsorption of phenol onto the green husk of walnut fruit
  • The results showed that the peroxide value and thiobarbituric acid oxidation rate increased over time, but the samples containing the extract and the powder of walnut husk showed less oxidation compared to the control in most concentrations
  • Considerable amounts of agricultural by-products rich in phenolic or other beneficial compounds are produced during the fruit harvesting process, which has gained increasing interest due to their excellent antioxidant activities
  • It is available in high amounts as an inexpensive waste product that is rich in phenolic compounds
  • Reviewing the investigations performed on the chemical composition of walnut husk indicated that it contains different chemicals mainly belonging to the classes of triterpenoids, naphthoquinones, and α-tetralones, which have been shown as potent anticancer agents
  • These constituents could be introduced as novel drugs or used as lead compounds for developing new anticancer agents

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