菠菜冷藏能保存营养
<SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">菠菜营养丰富,在春天吃尤为鲜嫩可口。但国际厚生健康网站近日一篇文章指出,菠菜从采摘到被摆上饭桌,会因为保存不当而流失近一半的营养。如何留住这些营养?专家们提出了最好的保存方法。</SPAN><SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">    </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">美国宾州大学的研究人员表示,菠菜刚从土里拔出来时,含有丰富的营养成分,最重要的有两种:一种是可以预防婴儿出生时脊柱裂的维生素</SPAN><SPAN lang=EN-US>B</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">类营养物质———叶酸,另一种是人体生长发育以及预防失明所需的维生素</SPAN><SPAN lang=EN-US>A</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">类营养物质———胡萝卜素。此外,菠菜中含有丰富的抗氧化剂,对延缓衰老还有不可估量的作用。美国农业部一项实验表明,女性每天吃</SPAN><SPAN lang=EN-US>30</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">克左右的新鲜菠菜,比吃</SPAN><SPAN lang=EN-US>1250</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">毫克的维生素</SPAN><SPAN lang=EN-US>C</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">或喝</SPAN><SPAN lang=EN-US>3</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">杯红葡萄酒的抗衰老效果更好。</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></FONT></P>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">    </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">但研究人员也发现,菠菜摘下后几天,营养成分就开始减少,</SPAN><SPAN lang=EN-US>4</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">—</SPAN><SPAN lang=EN-US>8</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">天内会流失近一半的叶酸,胡萝卜素也会降到原有含量的</SPAN><SPAN lang=EN-US>54%</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">左右。</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></FONT></P>
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<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT size=3><SPAN lang=EN-US><SPAN style="mso-spacerun: yes">    </SPAN></SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">怎样才能解决菠菜的营养流失问题呢?专家们指出,将菠菜放在冰箱里冷藏起来是个好办法。实验证明,低温可以在很大程度上减少菠菜中营养物质的流失。另外,很多人以为,罐头肯定不如新鲜蔬菜的营养高,专家们也证明,这种想法并不完全正确。菠菜罐头中所保存的营养,比起放了一段时间的新鲜菠菜来说,更丰富一些。</SPAN><SPAN lang=EN-US><o:p></o:p></SPAN></FONT></P>
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