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Effect [%] of cooking time [min] on the amino acid concentration of Monodora myristica seed flour

Effect [%] of cooking time [min] on the amino acid concentration of Monodora myristica seed flour

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BACKGROUND: Monodora myristica (Gaertn.) Dunal is a useful but underutilised tropical tree of the Annona- ceae or custard apple family of flowering plants which is rich in proteins. The objective of this study was to evaluate the effect of thermal processing on the protein quality of Monodora myristica (Gaertn.) Dunal seeds. METHODS: Raw, boiled (1...

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Context 1
... concentration of some of the amino acids investi- gated was progressively reduced as the cooking time was extended from 10 min to 30 min ( Fig. 1) with the strongest effect (62.2%) on Proline (at B30) and weak- est (0.5%) on Glutamic acid (at R10). Fagbemi (2009) has also reported decreases in most of the amino acids in cashew nuts when processed by drying, fermenta- tion and germination. However, there were also some increases in some of the amino acids in the roasted samples. ...
Context 2
... degree of reductions for the individual amino acids was considered. The ob- served data suggested that M. myristica seed should not be boiled more than 30 minutes to prevent a high leaching effect on the amino acid. Based on the shown effect of cooking on the amino acids, as reflected by the percentage difference between raw and cooked samples ( Fig. 1), Alanine was the most stable and Pro- line and Methionine the most vulnerable amino acids in the samples. Anyalogbu et al. (2015) reported that Tyrosine was the most stable and Serine and Valine the most vulnerable amino acids in cooked Plukenetia conophora (African walnut) seed ...

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... The observed decrease in the amino acid level in the boiled vegetable could be accounted for as leaching into the cooking water. The leaching may have been facilitated by heat, which was found to increase solubility of nutrients in the processing water [15]. It has been reported that the content of FAA decreased with the prolonged cooking time with an almost equal increase in its content in the cooking water [16]. ...
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This study aimed to investigate the influence of different thermal treatment methods (boiling, steaming) on the metabolome and volatilome of Brussels sprouts. Targeted, quantitative analysis of primary metabolites (amino acids and sugars), glucosinolates as well as untargeted analysis of volatile organic compounds (VOCs) were performed. The composition of primary metabolites was affected only by boiling, where the loss of nutrients was observed. Glucosinolate content increased after cooking, which can be explained by the loosening of the plant tissues and its better extractability. Most marked changes were noticed in the volatilome. Among the degradation products of glucosinolates, isothiocyanates were the main chemical group in the raw and boiled vegetable. In contrast, steaming favored the formation of nitriles. Another dominant group of VOCs were aldehydes, which were the most abundant in raw Brussels sprouts and their level significantly decreased after thermal treatment. It is well known that isothiocyanates are substances with widely proven bioactive properties. Therefore, their formation in the glucosinolate degradation process is favorable. Based on the obtained results, it was concluded that boiling seems to be the most beneficial form of Brussels sprouts’ processing.