The vitamin E isoforms, namely -, - and -tocopherols, -, - and -tocotrienols content in
the oils is tabulated in Table 2. In palm oil, only -tocopherol, -, - and -tocotrienols were
present. Whilst in soy oil, only tocopherol isoforms (, and ) were detected but none of
tocotrienols. Fresh palm oil had larger content of total vitamin E compared to fresh soy oil.
Once and five times heated palm oils had significantly lower content of all vitamin E
isoforms than the fresh palm oil. In five times heated palm oil, all the isoforms content were
also significantly reduced compared once heated palm oil. For soy oil, once and five times
heating decreased the -tocopherol content significantly compared to the fresh oil. The
contents of - and -tocopherols were only reduced significantly in five times heated soy oil
compared to once heated and fresh soy oils.
The vitamin E isoforms, namely -, - and -tocopherols, -, - and -tocotrienols content inthe oils is tabulated in Table 2. In palm oil, only -tocopherol, -, - and -tocotrienols werepresent. Whilst in soy oil, only tocopherol isoforms (, and ) were detected but none oftocotrienols. Fresh palm oil had larger content of total vitamin E compared to fresh soy oil.Once and five times heated palm oils had significantly lower content of all vitamin Eisoforms than the fresh palm oil. In five times heated palm oil, all the isoforms content werealso significantly reduced compared once heated palm oil. For soy oil, once and five timesheating decreased the -tocopherol content significantly compared to the fresh oil. Thecontents of - and -tocopherols were only reduced significantly in five times heated soy oilcompared to once heated and fresh soy oils.
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