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<title><string language="fre"><![CDATA[Dr Pawe? Siudem - Aronia melanocarpa Fruits as a Dietary Source of bioactive compounds: 1H?NMR, HPLC-DAD, and Chemometric Studies]]></string></title>
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<string language="fre"><![CDATA[Aronia melanocarpa (Michx.) Elliott's (chokeberry) it is well known
for the presence of anthocyanins. The fruits also  contain significant amounts of other
bioactive compounds, such as chlorogenic acid and its isomer neochlorogenic
acid. They exhibit antioxidant, anti-inflammatory, antidiabetic, and
antibacterial activities; thus, they can have a significant impact on the
health-promoting properties of chokeberry. In our research, we have determined
the changes in the content of chlorogenic acids (CGA) and anthocyanins during
the development and ripening of fruits. Aronia fruit samples from two organic
farms in Poland, were collected every two weeks from July to October. The
methods of NMR spectroscopy and HPLC-DAD were used to determine the chemical
composition of the prepared methanolic extracts. The obtained results were
analyzed using chemometric analysis and multivariate statistics (PCA). The
results showed that the content of chlorogenic acids and anthocyanins changes
during ripening and depends on the time of harvest and the region of
cultivation. A correlation between the time of CGAs reduction and the appearance
of anthocyanins was also noticed. Additionally, the antioxidant properties of
extracts were determined using three methods: DPPH, FRAP and ORAC.
 
 ]]></string></description>
<keyword><string language="fre"><![CDATA[raisin]]></string></keyword><keyword><string language="fre"><![CDATA[composés bioactifs]]></string></keyword>
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<date><dateTime>2020-12-03</dateTime></date>
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