González E, Montenegro M A, Nazareno M A, López de Mishima B A
Instituto de Ciencias Químicas, Facultad de Agronomía y Agroindustrias, Universidad Nacional de Santiago del Estero, Santiago del Estero, República Argentina.
Arch Latinoam Nutr. 2001 Dec;51(4):395-9.
The carotenoid composition of butternut squash (Cucurbita moschata) cultivated in the province of Santiago del Estero, Argentina, was determined. The main carotenoids isolated were identified as beta-carotene (beta,beta-carotene), alpha-carotene (beta,epsilon-carotene), and lutein (beta,epsilon-carotene-3,3'-diol) and the minor carotenoids, as phytofluene (7,8,11,12,7',8'-hexahydro-psi,psi-carotene), zeta-carotene (7,8,7',8'-tetrahydro-psi,psi-carotene), neurosporene (7,8-dihydro-psi,psi-carotene), violaxanthin (5,6,5',6'- diepoxy-5,6,5',6'-tetrahydro-beta,beta-carotene-3,3'-diol) and neoxanthin (5,6-epoxy-6,7-didehydro-5,6,5',6'-tetrahydro-beta,beta- carotene-3,5,3'-triol). In some samples, 5,6,5',6'-beta-carotene diepoxide, (5,6,5',6'-diepoxy-5,6,5',6'-tetrahydro-beta,beta-carotene) and flavoxanthin (5,8-epoxy-5,8-dihydro-beta,epsilon-carotene-3,3'-diol) were detected. The presence of cis-isomers of beta,beta-carotene was also detected by HPLC. The vitamin A value obtained was 432 micrograms RE/100 g fresh sample, which indicates that this vegetable is an important source of provitamin A.
对阿根廷圣地亚哥-德尔埃斯特罗省种植的笋瓜（南瓜属）的类胡萝卜素成分进行了测定。分离出的主要类胡萝卜素被鉴定为β-胡萝卜素（β,β-胡萝卜素）、α-胡萝卜素（β,ε-胡萝卜素）和叶黄素（β,ε-胡萝卜素-3,3'-二醇），次要类胡萝卜素为八氢番茄红素（7,8,11,12,7',8'-六氢-ψ,ψ-胡萝卜素）、ζ-胡萝卜素（7,8,7',8'-四氢-ψ,ψ-胡萝卜素）、神经孢菌红素（7,8-二氢-ψ,ψ-胡萝卜素）、紫黄质（5,6,5',6'-二环氧-5,6,5',6'-四氢-β,β-胡萝卜素-3,3'-二醇）和新黄质（5,6-环氧-6,7-去氢-5,6,5',6'-四氢-β,β-胡萝卜素-3,5,3'-三醇）。在一些样品中，检测到了5,6,5',6'-β-胡萝卜素二环氧物（5,6,5',6'-二环氧-5,6,5',6'-四氢-β,β-胡萝卜素）和黄素黄质（5,8-环氧-5,8-二氢-β,ε-胡萝卜素-3,3'-二醇）。通过高效液相色谱法还检测到了β,β-胡萝卜素顺式异构体的存在。所获得的维生素A值为432微克视黄醇当量/100克新鲜样品，这表明这种蔬菜是维生素A原的重要来源。
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