Full
Outline
To comprehensively evaluate the nutritional value of Juglans regia L. in different regions of Xinjiang.
Using a fully automatic amino acid analyzer, the ninhydrin post-column derivatization ion-exchange chromatography method was employed at wavelengths of 570 nm and 440 nm. By comparing with the amino acid pattern spectra of the United Nations Food and Agriculture Organization/World Health Organization(FAO/WHO) and the ideal protein standards, the ratios of essential amino acids (RAA) and the ratio coefficients of essential amino acids (RC) were calculated. The nutritional value of amino acid content in Juglans regia L. kernels was evaluated.
The 44 Juglans regia L. samples from different locations in 3 regions of Xinjiang all contained 17 kinds of amino acids, among which glutamic acid, lysine and arginine had relatively high content, and the proportion of essential amino acids was 0.32. The amino acid composition of Juglans regia L. from different regions varied greatly, and the amino acid ratio of walnuts from Kashgar region was better than that of other regions.Through the comparison and analysis of the FAO/WHO amino acid pattern spectrum, lysine and threonine were the main limiting amino acids. The score of ratio coefficient (SRC) value of the Zha 343 variety Juglans regia L. was the highest, and the defect degree of the first limiting amino acid was the lightest. Its RC value (chemical score) of lysine was 0.761. The amino acid supply and demand balance was the best, and there was no extremely excessive amino acid in this variety. The total RC value of phenylalanine and tyrosine was 1.406.
Based on the comprehensive amino acid evaluation indicators, the comprehensive nutritional quality of Zha 343 Juglans regia L. in Kashgar, Xinjiang is superior. This study provides a scientific basis for the analysis of nutritional components and processing utilization of Juglans regia L., and offers theoretical support for enhancing the market value of Xinjiang Juglans regia L.and promoting their application.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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