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    Enzymatic hydrolysis of complex substrates following thermal pretreatment operations
    (Kluwer Academic Publishers, 1993) Vardar-Sukan F.; Sukan S.S.; Gaye O.-B.
    Most agroindustrial wastes generally undergo various thermal treatments during processing stages. The aim of this study was to determine the effect of different heat treatment methods on hydrolysis efficiency of such natural substrates. It was found that a wet thermal treatment generally increases the rate and degree of hydrolysis, while a dry one has a detrimental effect. © 1993 Chapman & Hall.
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    Foaming and enzyme activity in fungal cultures grown on sugar beet cosette
    (Kluwer Academic Publishers, 1985) Sukan S.S.; Güray A.
    Enzyme synthesis, foaming behaviour and its effects were studied using two common cellulolytic fungi;Trichodermareesei and Sporotrichum pulverulentum in a medium containing sugar beet cosette as a cellulosic substrate. Cellulase enzyme activities in the culture broth were found to be higher than the enzyme activities in natural and experimentally forced foam layers. © 1985 Kluwer Academic Publishers.
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    Mixing performance of air-lift fermenters against working volume and draft tube dimensions
    (Springer-Verlag, 1987) Sukan S.S.; Vardar-Sukan F.
    Mixing characteristics of a laboratory scale internal loop air-lift fermenter has been investigated. The effects of different draft tube dimensions and positions as well as varying levels of liquid height over the draft tube, on mixing time were determined. The results indicate the existance of an optimum liquid height and thus liquid volume with respect to mixing performance especially for the taller draft tubes. © 1987 Springer-Verlag.
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    Production and properties of inulinase from Aspergillus niger
    (Kluwer Academic Publishers, 1994) Öngen-Baysal G.; Sukan S.S.; Vassilev N.
    A thermostable inulinase was identified in a strain of A. niger. The highest activity was observed at 50 °C (50 Lml-1) and 77% and 34% of this was retained at 60° and 65°C, respectively. pH stability, the effect of thermal stabilizers such as Propylene glycol (10%) and Sorbitol (10%) and effects of different cations were investigated. It was found that the activity was completely inhibited by Ag+ and Hg2+, while Na+ had an activator effect. © 1994 Lonsdale Press Ltd.
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    Production of inulinase by mixed culture of Aspergillus niger and Kluyveromyces marxianus
    (1996) Öngen-Baysal G.; Sukan S.S.
    Inulinase activity produced by a mixed culture of Aspergillus niger and Kluyveromyces marxianus growing on Jerusalem artichoke powder was investigated. Inulinase produced by this mixed culture had a higher invertase-type activity than inulinase from respective monocultures. When hydrolysis was carried out at 50°C with Jerusalem artichoke exctract (total sugar 16% w/v) at pH 5.0, 90% hydrolysis was achieved after 4 h with 5% v/v of crude cell free enzyme preparation.