Amino Acid, Mineral and Fatty Acid Content of Pumpkin Seeds (Cucurbita spp) and Cyperus esculentus Nuts in the Republic of Niger
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Dried seeds and nuts are widely consumed by indigenous populations of the western Sahel, especially those who inhabit rural areas. In light of the need for quantitative information regarding the content of particular nutrients in these plant foods, we collected dried pumpkin (Cucurbita spp) seeds and nuts of Cyperus esculentus in the Republic of Niger and analyzed them for their content of essential amino acids, minerals and trace elements, and fatty acids.
On a dry weight basis, pumpkin seed contained 58.8% protein and 29.8% fat. However, the lysine score of the protein was only 65% relative to the FAO/WHO protein standard. The pumpkin seed contained useful amounts of linoleic (92 μg/g dry weight) and the following elements (on a μg per g dry weight basis): potassium (5,790), magnesium (5,690), manganese (49.3), zinc (113), selenium (1.29), copper (15.4), chromium (2.84), and molybdenum (0.81), but low amounts of calcium and iron. Except for potassium (5,573 μg/g dry weight) and chromium (2.88 μg/g dry weight), the C. esculentis nuts contained much less of these same nutrients compared to pumpkin seeds.
In conclusion, pumpkin seeds represent a useful source of many nutrients essential to humans. The data in this report should of practical value to public health officials in rural areas of sub-Saharan Africa.
Key words:Amino acids Cyperus esculentus Fatty acids Niger Nutrition Pumpkin seeds Trace minerals
- 1.Negbi M (1992) A sweetmeat plant, a perfume plant and their weedy relatives–a chapter in the history of Cyperus-esculentus L and C-rotundus L. Econ Bot 46: 64–71.Google Scholar
- 3.Mansour EH, Dworschak E, Peredi J, Lugasi A (1993) Evaluation of pumpkin seed (Cucurbita-pepo, Kakai 35) as a new source of protein. Acta Alimentaria 22: 3–13.Google Scholar
- 4.Mansour EH, Dworschak E, Pollhamer Z, Gergely A, Hovari J (1999) Pumpkin and canola seed proteins and bread quality. Acta Alimentaria 28: 59–70.Google Scholar
- 7.Tsaknis J, Lalas S, Lazos ES (1997) Characterization of crude and purified pumpkin seed oil. Grasas y Aceites 48: 267–272.Google Scholar
- 17.Hugli TE, Moore S (1972) Determination of the tryptophan content of proteins by ion exchange chromatography of alkaline hydrolysates. J Biol Chem 247: 2828–2834.Google Scholar
- 20.Morrison WR, Smith LM (1964) Preparation of fatty acid methyl esters and dimethylacetals from lipids with boron trifluoride-methanol. J Lipid Res 5: 600–608.Google Scholar
- 21.WHO (1985) WHO/FAO Report: Energy and Protein Requirements. WHO Technical Report Series No. 724. World Health Organization, Geneva.Google Scholar
- 23.Food and Nutrition Board (2002) Dietary reference intakes for energy, carbohydrate, fiber, fat, fatty acids, cholesterol, protein, and amino acids. Washington, DC; National Academy Press.Google Scholar