• hydroperoxide production from linoleic acid by heterologous gaeumannomyces graminis tritici lipoxygenase: optimization and scale-up

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 599
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     linoleic acid was converted into hydroperoxides by a gaeumannomyces graminis triticilipoxygenase produced recombinantly in trichoderma reesei. hydroperoxide production was optimized using a face-centred experimental design in order to study the effects of ph, temperature and time on the conversion of linoleic acid into four regioisomeric hydroperoxyoctadecadienoic acids (hpode): 13-(z,e)-, 9-(e,z)-, 13-(e,e)-, 9-(e,e)-hpode. fitting equations described satisfactorily the system behavior and showed that reaction time was the most influencing independent variable. a set of independent variables (ph = 6.7, temperature = 23.9 °c and time = 18 h) allowed to obtain high yields of hydroperoxides (88.0%) with a good selectivity for the 13-(z,e)-hpode isomer (47.4%) when the initial substrate concentration was 10 g/l. the production was further investigated using industrially relevant linoleic acid concentrations (100–300 g/l) leading to hpode yields of ∼40% and the volumetric productivity 3.6 g/(l h), and a selectivity for 13-(z,e)-hpode of around 74%.

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