Constituents of plants growing in Qatar III — Nutritive constituents of Garawah (Glossonema edule)
Tóm tắt
Both the pericarp and the unripe seeds of the unripe fruits ofGlossonema edule were separately analysed. The crude protein content of the unripe seeds is double that of the pericarp. Investigation of the amino acids of both parts revealed slight quantitative differences with chemical scores of 40, 40 for each of methionine and tryptophan and 65 for lysine. The ratio of essential total: amino acid averages 34.5, compared to a corresponding value of 47.4 for the reference egg proteins. The analysis of the fatty acids showed that the ratio of saturated to non-saturated fatty acids averaged 73:27; palmitic acid makes up 60% of the total fatty acids. The soluble carbohydrate content of the pericarp is slightly higher than the corresponding value in the unripe seeds. Paper chromatography of the free sugars of both parts revealed qualitative differences. The oligosaccharide reffinose was detected in both parts. The ash was analysed for its content in four trace minerals: iron, zinc, manganese and copper.
Tài liệu tham khảo
Batanouy KH (1981) Ecology and Flora of Qatar, Alden Press, Oxford, UK; Centre for Scientific and Applied Research, Qatar University
Burchfield HP, Storrs EE (1962) Biochemical Applications of Gas Chromatography, Academic Press, London.
Chapman HD, Pratt PF (1978) Methods of Analysis for Soil, Plant and Water. Univ California, Div Agric Sci USA
Holman RT (1958) Nutr Rev 16:22
Keys A (1967) J. Amer Diet Assoc 51:508
Malpress FH, Morrison AB (1949) Use of pyridine in the deionization of solutions for paper chromatography. Nature 164:963
Mukherjee S, Stivastana HC (1952) Improved spray reagents for the detection of sugars. Nature 169:330
Recommended Dietary Allowances (1980) 9th ed, National Academy of Sciences, Food and Nutrition Board, Washington DC, USA
Spackman DH, Stein WH, Morre S (1958) Automatic recording apparatus for use in chromatography of amino acids. Anal Chem 30:1190
Swern D (ed) Bailey's Industrial Oil and Fat Products (1964), 3rd ed Interscience Publ, New York
World Health Organization (1973) Energy and Protein Requirements WHO Techn Rep Ser No 522