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标题：COMPARATIVE STUDIES ON THE PROXIMATE COMPOSITIONS, MINERALS AND ANTI-NUTRITIONAL FACTORS IN THE LEAVES AND STEM OF Grewia carpinifolia
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作者：Elizabeth Olamide Adebiyi ; Kehinde Olugboyega Soetan ; Funsho Olakitike Olayemi 等
期刊名称：Annals : Food Science and Technology
电子版ISSN：2065-2828
出版年度：2015
卷号：16
期号：1
出版社：Valahia University Press
摘要：The leaves and stem of Grewia carpinifolia were evaluated for their nutritional and anti-nutritional composition. The results showed that the leaves had significantly higher (p<0.05) crude protein (18.7 + 0.06%), crude fat (5.19+ 0.02%), ash (9.92+ 0.03%) and gross energy (3.32+ 0.01Kcal/g) than the stem having crude protein (6.90+ 0.03%), crude fat (1.06+ 0.02%), ash (2.55+ 0.02%) and gross energy (1.67+ 0.01Kcal/g), while the stem had significantly higher (p<0.05) crude fibre (25.7+ 0.02%) and moisture (8.40+ 0.01%) compared to the leaves having crude fibre (16.10+ 0.02%) and moisture (6.32+ 0.48%). The leaves recorded significantly higher values (p<0.05) for all the minerals analysed, Ca (0.26+ 0.01%), Mg (0.49+ 0.01%), K (0.92 + 0.01%), P (0.42+ 0.00ppm), Na (0.20+ 0.01ppm), Se (0.0083+ 0.00mg/kg), Fe (192.00+ 0.02mg/kg), Cu (4.91+ 0.02) and Zn (62.10+ 0.02mg/kg) as against the stem. For the antinutritional factors, the leaves showed significantly higher (p<0.05) concentrations of trypsin inhibitor (3.91+ 0.03TIU/mg), chymotrypsin inhibitor (8.42+ 0.03CU/mg), haemagglutinin (25.20+ 0.02HU/mg), oxalate (0.95+ 0.01%), phytate (1.29+ 0.02%), tannin (0.07+ 0.00), flavonoids (0.004+ 0.00%) and phenols (0.12+ 0.00%), while the stem recorded significantly higher (p<0.05) levels of saponin (0.57 + 0.00%), alkaloids (2.33+ 0.01%) and glycosides (0.24+ 0.00%). The study concluded that the leaves of Grewia carpinifolia had generally higher nutritional quality compared to the stem due to significantly higher crude protein, crude fat, ash, gross energy and mineral contents. However, there is the need to conduct research on the in vitro digestibility and toxicity assessment of G. carpinifolia, so as to standardize and maximize its nutritional potentials. G. carpinifolia could be a rich source of proteins if its antinutritional factors are adequately processed to reduce or eliminate them.
关键词：Grewia carpinifolia; proximate analysis; minerals; anti-nutrition al contents