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Five species of marine phytoplankton, Phaeodactylum tricornutum, Chaetoccros minutissimus, Platymunas suhcordiforinis, Nitzschia sp. and Dunaliella sp. were analyzed for the contents of total nitrogen, free amino acid and total amino acid. Their total nitrogen content was relatively high, ranging 3.37-7.6% and the total amino acid content 15.1-36.0%, Glu, Asp, Leu, Ala, Arg, and Gly being the main components. The free amino acid content in two species, Dunalietta sp. and Nitzschia sp. ranged 0.13-0.30%, in which Arg, Ala, Glu, and Asp were predominant. The crude protein in phytoplankton is high enough to be comparable with that of higher classes of seaweed such as Porphyra and Laminaria. 相似文献
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室内培养了5种浮游植物,并测定了它们的氮和总氨基酸含量,氮含量范围为3.37-7.61%,含量顺序为菱形藻>杜氏藻>三角褐指藻>小角刺藻>亚心扁藻,总氨基酸中共测出17种氨基酸,含量最多的氨基酸顺序一般为谷氨酸>天门冬氨酸>亮氨酸>丙氨酸>精氨酸和甘氨酸,含量范围为1.0-4.16%,各藻的总氨基酸含量顺序与氮含量相同,还测定了杜氏藻和菱形藻的乙醇可溶游离氨基酸含量,共测出16种,其中以谷氨酸、精氨酸、丙氨酸、天门冬氨酸等为主要成分,含量范围为0.15-0.59%. 相似文献
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