The edible portion of chestnut, Castenea crenata Sieb, et Zucc, were freeze-dried and subjected to analysis of minerals, lipid classes and fatty acid composition by silicic acid column chromatography and gas-liquid chromatography. The results of analysis for the minerals in chestnut showed that the ...
The edible portion of chestnut, Castenea crenata Sieb, et Zucc, were freeze-dried and subjected to analysis of minerals, lipid classes and fatty acid composition by silicic acid column chromatography and gas-liquid chromatography. The results of analysis for the minerals in chestnut showed that the contents of magnesium, iron and phosphorus were decreased during storage after freeze-drying. The contents of neutral lipids, glycolipids and phospholipids in the raw edible portion were 34.6, 38.6, and 26.8%, respectively. The contents of neutral lipids and phospholipids of the freeze-dried chestnut were decreased, while glycolipids were increased during storage. In the fatty acid composition of total lipid, $C_{16:0}$, $C_{18:2}$ and $C_{18:3}$ acid were abundant in the raw edible portion, but freeze-dried chestnut contained relatively much amount of $C_{16:0}$, $C_{18:1}$, and $C_{18:2}$ acid. It is noticeable that $C_{18:2}$ and $C_{18:3}$ acid in the freeze-dried chestnut were remarkably decreased during storage. Upon the fatty acid composition, total lipid contained $C_{18:2}$ and $C_{16:0}$ acid in the highest proportion, but neutral lipids, glycolipids and phospholipids contained $C_{16:0}$ and $C_{18:2}$ acid in the highest proportion. Cycloartenol (20.6%) was a major component in the 4-monomethylsterol fraction separated by thin layer chromatography and cyclolaudenol, cycloeucalenol, and citrostadienol were detected as minor components. Sitosterol (74.6%) was a major component in the 4-desmethylsterol fraction separated by thin-layer chromatography and ${\Delta}^5-avensterol$, campesterol, stigmasterol and brassicasterol were also detected as minor components.
The edible portion of chestnut, Castenea crenata Sieb, et Zucc, were freeze-dried and subjected to analysis of minerals, lipid classes and fatty acid composition by silicic acid column chromatography and gas-liquid chromatography. The results of analysis for the minerals in chestnut showed that the contents of magnesium, iron and phosphorus were decreased during storage after freeze-drying. The contents of neutral lipids, glycolipids and phospholipids in the raw edible portion were 34.6, 38.6, and 26.8%, respectively. The contents of neutral lipids and phospholipids of the freeze-dried chestnut were decreased, while glycolipids were increased during storage. In the fatty acid composition of total lipid, $C_{16:0}$, $C_{18:2}$ and $C_{18:3}$ acid were abundant in the raw edible portion, but freeze-dried chestnut contained relatively much amount of $C_{16:0}$, $C_{18:1}$, and $C_{18:2}$ acid. It is noticeable that $C_{18:2}$ and $C_{18:3}$ acid in the freeze-dried chestnut were remarkably decreased during storage. Upon the fatty acid composition, total lipid contained $C_{18:2}$ and $C_{16:0}$ acid in the highest proportion, but neutral lipids, glycolipids and phospholipids contained $C_{16:0}$ and $C_{18:2}$ acid in the highest proportion. Cycloartenol (20.6%) was a major component in the 4-monomethylsterol fraction separated by thin layer chromatography and cyclolaudenol, cycloeucalenol, and citrostadienol were detected as minor components. Sitosterol (74.6%) was a major component in the 4-desmethylsterol fraction separated by thin-layer chromatography and ${\Delta}^5-avensterol$, campesterol, stigmasterol and brassicasterol were also detected as minor components.
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