a Department of Chemistry and Biochemistry , Instituto de Biociências, Universidade Estadual Paulista (UNESP) , Botucatu , São Paulo , Brazil.
Food Addit Contam Part B Surveill. 2012;5(3):188-93. doi: 10.1080/19393210.2012.695398. Epub 2012 Jul 10.
Different parts of plant foods are generally discarded by consumers such as peel, stalk and leaves, which could however possess a nutritional value. However, few studies have analysed the composition of these marginal foods. The phenolic compound, flavonoid, polyamine, nitrate and pesticide contents of parts of vegetables that are usually discarded--but which were cultivated according to conventional and non-conventional procedures--were analysed to provide suggestions on how to improve the consumption of these parts and to reduce the production of urban solid waste. Few, but significant, differences between the two manuring procedures were observed. Higher nitrate content and the presence of organochlorine pesticides were found in conventional cultivated papaya peel, lemon balm leaves, jack fruit pulp, and beet stalk and peel. Discarded parts of plant foods such as stalk, leaves and peels can be used as a source of antioxidant compounds, such as phenolic compounds.
植物性食物的不同部位通常会被消费者丢弃，如果皮、菜梗和菜叶，而这些部位可能具有营养价值。然而，很少有研究分析这些边缘食物的成分。本研究分析了通常被丢弃的部分蔬菜（按照传统和非传统方法种植）的酚类化合物、类黄酮、多胺、硝酸盐和农药含量，旨在为提高这些部位的食用价值和减少城市固体废物的产生提供建议。两种施肥方式之间存在一些差异，但并不明显。在常规种植的木瓜皮、柠檬香蜂草叶、菠萝蜜果肉以及甜菜梗和皮中，硝酸盐含量和有机氯农药含量较高。蔬菜的菜梗、菜叶和果皮等废弃部位可以用作抗氧化化合物（如酚类化合物）的来源。
