Plant Foods for Human Nutrition

, Volume 56, Issue 1, pp 75–82 | Cite as

Chemical composition of walnuts (Juglans regia L.) grown in New Zealand

  • G.P. Savage


Walnuts (Juglans regia L.) werecollected during the 1997 harvest from 12 differentcultivars of trees grown in a replicated trial in anexperimental orchard at Lincoln University. Two UScommercial cultivars (Tehama and Vina), three Europeancommercial cultivars (Esterhazy, G139, G120) and eightNew Zealand selections (Rex, Dublin's Glory, Meyric,Stanley, 150, 151, 153) were evaluated. The total oilcontent ranged from 62.6 to 70.3% while the crudeprotein ranged from 13.6 to 18.1%. Dietary fiberranged from 4.2 to 5.2% while the starch content madeup no more than 2.8% of the remaining portion of thekernel. The amino acid content of the walnuts wassimilar between cultivars and the patterns ofessential amino acids were characteristic of a highquality protein.

Amino acids Ash Crude protein Dietary fiber Oil content Starch Walnuts 


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  1. 1.
    Hu FB, Stampfer MJ, Manson JE, Rim EB, Colditz GA, Rosner BA, Speizer FE, Hennekens CH, Wilett WC (1998) Frequent nut consumption and risk of coronary heart disease in women: prospective cohort study. Br Med J 317: 1341-1345.Google Scholar
  2. 2.
    Fraser GE, Sabaté J, Beeson WL, Strahan TMA (1992) Possible protective effect of nut consumption on risk of coronary heart disease. Arch Int Med 152: 1416-1424.Google Scholar
  3. 3.
    Colditz GA, Manson JE, Hankinson SE (1997) The nurses' Health Study: 20-year contribution to the understanding of health among women. J Wom Health 6: 49-62.Google Scholar
  4. 4.
    Sabaté J, Fraser GE, Burke K, Knutsen SF, Bennett H, Linstead KD (1993) Effects of walnuts on serum lipid levels and blood pressure in normal men. New Engl J Med 329: 603-60.Google Scholar
  5. 5.
    Lavedrine F, Zmirou D, Ravel A, Balducci F, Alary J (1999) Blood cholesterol and walnut consumption: A cross-sectional survey in France. Prev Med 28: 333-339.Google Scholar
  6. 6.
    Fraser GE (1994) Diet and coronary heart disease: beyond dietary fats and low densitylipoprotein cholesterol Am J Clin Nutr 59: 1117-11235.Google Scholar
  7. 7.
    Sabaté J, Fraser GE (1993) The probable role of nuts in preventing coronary heart disease. Prim Cardiol 19: 65-72.Google Scholar
  8. 8.
    Dolecek TA (1992) Epidemiological evidence of relationships between dietary polyunsaturated fatty acids and mortality in the multiple risk factor intervention trial. Proc Soc Exp Biol Med 200: 177-182.Google Scholar
  9. 9.
    Ascherto A, Rimm EB, Giovannucci EL, Spiegelman D, Stampfer M, Willett WC (1996) Dietary fat and risk of coronary heart disease in men: Cohort follow up study in the United States. Br Med J 313: 84-90.Google Scholar
  10. 10.
    Ruggeri S, Cappelloni M, Gambelli L, Nicoli S, Carnovale E (1996) Chemical composition and nutritive value of nuts grown in Italy. Ital J Food Sci 3: 243-252.Google Scholar
  11. 11.
    Zwarts L, Savage GP, McNeil D (1999) Fatty acid content of New Zealand-grown walnuts. Int J Food Sci Nutr 50: 189-194.Google Scholar
  12. 12.
    Savage GP, Dutta PC, McNeil DL (1999) Fatty acid, tocopherol content and oxidative stability of walnut oils. J Am Oil Chem Soc 76: 1059-1063.Google Scholar
  13. 13.
    Murdock DK, McIntosh, K, McNeil DL (1995) Hazelnut variety trial in Canterbury. Tree Cropper Off J NZ Tree Crops Assoc 4: 12-17.Google Scholar
  14. 14.
    Baron LC, Riggert C, Stebbins RL, Bell S (1985) Oregon State University Extension Service Circular 1219/ May 1985, Oregon, USA, 19 pp.Google Scholar
  15. 15.
    AOAC (1995): Official Methods, 16th edn. Arlington, VA, USA: AOAC.Google Scholar
  16. 16.
    Van Soest PJ, Wine RH (1967) Use of detergents in the analysis of fibrous feed, IV: Determination of cell-wall constituents. J Assoc Off Anal Chem 50: 50-55.Google Scholar
  17. 17.
    Kritchevsky D, Tepper SA, Czarnecki SK, Klurfeld DM (1982) Atherogenicity of animal and vegetable protein. Influence of the lysine to arginine ratio. Atherosclerosis 41: 429-431.Google Scholar

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • G.P. Savage
    • 1
  1. 1.Food Group, Animal and Food Sciences DivisionLincoln UniversityCanterburyNew Zealand

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