AOAC International. Official Methods of Analysis/Bylaws.1995. Association of Official Analytical Chemists International, Gaithersburg, MD.

Amin F, Masoodi F A, Baba W N, Khan A A, Ganie B A. 2017. Effect of different ripening stages on walnut kernel quality: Antioxidant activities, lipid characterization and antibacterial properties. Journal of Food Science and Technology, 54, 3791–3801.

Beenu T, Rajni M, Ankit G. 2021. Nutritional and phytochemical composition of pecan nut and its hypocholesterolemic effect in an animal model. British Food Journal, 123, 1433–1448.

Chatrabnous N, Yazdani, N, Vahdati K. 2018. Determination of nutritional value and oxidative stability of fresh walnut. Directory of Open Access Journals, 540862, 11–20.

Christopoulos M V, Tsantili E. 2011. Effects of temperature and packaging atmosphere on total antioxidants and colour of walnut (Juglans regia L.) kernels during storage. Scientia Horticulturae, 131, 49–57.

Ellman, G 1959. Tissue sulfhydryl groups. Archives of Biochemistry and Biophysics, 82, 70–77.

FAO (Food and Agriculture Organization of the United Nations). 2023. Retrieved from https://www.fao.org/faostat/zh/#home. New York, USA.

Feng Y, Wang Z, Chen J, Li H, Wang Y, Ren D, Lu J. 2021. Separation, identification, and molecular docking of tyrosinase inhibitory peptides from the hydrolysates of defatted walnut (Juglans regia L.) meal. Food Chemistry, 353, 129471.

Geng S, Ning D, Ma T, Chen H, Zhang Y, Sun, X. 2021. Comprehensive analysis of the components of walnut kernel (Juglans regia) in China. Journal of Food Quality, 2021, 9302181.

GB/T 24307–2009. 2009. Quality Grades of Products for Carya cathayensis Sarg. Forestry Administration of the People’s Republic of China, Beijing.

GB5009.124. 2016. National Food Safety Standard-Determination of Amino Acid in Foods Standard Press of China, Beijing.

Jahanbani R, Bahramnejad E, Rahimi N, Shafaroodi H, Sheibani N, Moosavi-Movahedi A A, Dehpour A R, Vahdati K. 2021. Anti-seizure effects of walnut peptides in mouse models of induced seizure: The involvement of GABA and nitric oxide pathways. Epilepsy Research, 176, 106727.

Jiao B, Shi A, Liu H, Sheng X, Liu L, Hu H, Adhikari B, Wang Q. 2018. Effect of electrostatically charged and neutral polysaccharides on the rheological characteristics of peanut protein isolate after high-pressure homogenization. Food Hydrocolloids, 77, 329–335.

Kong X, Huang Z, Zhang C, Hua Y, Chen Y, Li X. 2023. Phenolic compounds in walnut pellicle improve walnut protein solubility under pH-shifting condition. Food Research International, 163, 112156.

Kong X, Zhang L, Lu X, Zhang C, Hua Y, Chen Y. 2019. Effect of high-speed shearing treatment on dehulled walnut proteins. LWT-Food Science & Technology, 116, 108500.

Laemmli U. 1970. Cleavage of structural proteins during the assembly of the head of bacteriophage T4. Nature, 227, 680–685.

Li Q, Mo R, Wang R, Ni Z, Zheng Y, Han Y, Wu S, Tang F, Yuan X, Liu Y. 2022. Characterization and assessment of chemical components in walnuts with various appearances. Journal of Food Composition and Analysis, 107, 104361.

Li S, Liu Z, Hei X, Wu C, Ma X, Hu H, Jiao B, Zhu J, Adhikari B, Wang Q, Shi A. 2023. Effect of physical modifications on physicochemical and functional properties of walnut protein. Foods, 12, 3709.

Lowry O, Rosebrough N, Farr A, Randall R. 1951. Protein measurement with the Folin phenol reagent. Journal of Biological Chemistry, 193, 265–275.

Mao X, Hua Y, Chen G. 2014. Amino acid composition, molecular weight distribution and gel electrophoresis of walnut (Juglans regia L.) proteins and protein fractionations. International Journal of Molecular Sciences, 15, 2003–2014.

Mousa K, Rezaei A, Hassani D, Saadat S, Kourosh V. 2020. Phenotypic evaluation and identification of superior Persian walnut (Juglans regia L.) genotypes in Mazandaran Province, Iran. Journal of Nuts, 11, 315–326.

Pakrah S, Rahemi M, Nabipour A, Zahedzadeh F, Kakavand F, Vahdati K. 2021. Sensory and nutritional attributes of Persian walnut kernel influenced by maturity stage, drying method, and cultivar. Journal of Food Processing and Preservation, 45, e15513.

Rashwan A K, Osman A I, Abdelshafy A M, Mo J L, Chen W. 2023a. Plant-based proteins: Advanced extraction technologies, interactions, physicochemical and functional properties, food and related applications, and health benefits. Critical Reviews in Food Science and Nutrition, 65, 667–694.

Rashwan A K, Osman A I, Wei C. 2023b. Natural nutraceuticals for enhancing yogurt properties: A review. Environmental Chemistry Letters, 21, 1907–1931.

R Core Team. 2021. R: A language and environment for statistical computing R foundation. [2/10/2023]. http://www.r-project.org

Sarikhani S, Vahdati K, Ligterink W. 2021. Biochemical properties of superior Persian walnut genotypes originated from southwest of Iran. Journal of Horticultural Science, 8, 13–24.

SAS (Statistical Analysis System) Institute.1990. Statistical Analysis System/STAT User’s Guide. vol. 6, 4th ed. Cary, NC.

Scitovski R, Sabo K, Martínez-Álvarez F, Ungar Š. 2021. Cluster analysis and applications. Springer. [2024-11-20]. https://link.springer.com/book/10.1007/978-3-030-74552-3.

Szalóki-Dorkó L, Kumar P, Székely D, Végvári G, Ficzek G, Simon G, Abrankó L, Tormási J, Bujdosó G, Máté M. 2024. Comparative study of different walnut (Juglans regia L.) varieties based on their nutritional values. Plants, 13, 2097.

Vahdati K. 2014. Traditions and folks for walnut growing around the silk road. Acta Horticulturae, 1032, 19–24.

Wall J. 2022. The Cultural Value of Trees: Folk Value and Biocultural Conservation. 1st ed, Routledge.

Wang L, Liu H, Liu L, Wang Q, Li S, Li Q. 2017. Prediction of peanut protein solubility based on the evaluation model established by supervised principal component regression. Food Chemistry, 218, 553–560.

Wang P, Zhong L, Yang H, Zhu F, Hou X, Wu C, Zhang R, Cheng Y. 2021. Comparative analysis of antioxidant activities between dried and fresh walnut kernels by metabolomic approaches. LWT-Food Science & Technology, 155, 112875.

Wei F, Chen Q, Du Y, Han C, Fu M, Jiang H, Chen X. 2020. Effects of hulling methods on the odor, taste, nutritional compounds, and antioxidant activity of walnut fruit. LWT-Food Science & Technology, 120, 108938.

Yu H, Liu H, Erasmus S W, Zhao S, Wang Q, van Ruth S M. 2020. Rapid high-throughput determination of major components and amino acids in a single peanut kernel based on portable near-infrared spectroscopy combined with chemometrics. Industrial Crops and Products, 158, 112956.

Zhang Y, Tian Z, Ma W, Zhang M, Yang L. 2022. Hyperspectral detection of walnut protein contents based on improved whale optimized algorithm. International Journal of Agricultural and Biological Engineering, 15, 235–241.

Zhu Z, Zhu W, Yi J, Liu N, Cao Y, Lu J, Decker E, McClement D. 2018. Effects of sonication on the physicochemical and functional properties of walnut protein isolate. Food Research International, 106, 853–861.