Modified Ethylene Oxide Adducts

Schönfeldt, N.

doi:10.1016/b978-0-08-012819-1.50011-5

Cited by 15 publications

(15 citation statements)

References 21 publications

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“…16 In addition, Tween 85 is biodegradable and has been successfully tested for use as an additive in fertilizer. 17 It has a hydrophilic/lipophilic balance (HLB) 18 of 11, which indicates that it is soluble in organic solvents. 17,19 In this study the effect of different system parameters on the Chromobacterium viscosum lipase (glycerol-ester hydrolase; EC 3.1.1.3) activity in AOT/Tween 85 mixed reverse micelles is investigated.…”

Section: Introductionmentioning

confidence: 99%

“…17 It has a hydrophilic/lipophilic balance (HLB) 18 of 11, which indicates that it is soluble in organic solvents. 17,19 In this study the effect of different system parameters on the Chromobacterium viscosum lipase (glycerol-ester hydrolase; EC 3.1.1.3) activity in AOT/Tween 85 mixed reverse micelles is investigated. The kinetic model for the lipase-catalysed hydrolysis of olive oil in AOT reverse micellar systems 14 is also applied to the enzymatic reaction in the mixed reverse micellar system to understand the kinetic mechanism of enzyme activity.…”

Section: Introductionmentioning

confidence: 99%

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Enzymatic activity ofChromobacterium viscosum lipase in an AOT/Tween 85 mixed reverse micellar system

Hossain¹,

Takeyama²,

Hayashi³

et al. 1999

J. Chem. Technol. Biotechnol.

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To enhance the Chromobacterium viscosum lipase (glycerol-ester hydrolase; EC 3.1.1.3) activity for the reaction of water-insoluble substrates, the AOT/isooctane reverse micellar interface was modi®ed by co-adsorption of a non-ionic surfactant. Polyoxyethylene sorbitan trioleate (Tween 85) was used as the non-ionic surfactant and olive oil as a water-insoluble substrate. An appreciable increase of lipase activity was observed and at higher W o values (where W o = molar ratio of water to total surfactants of the micellar system) there was no sharp fall of the enzyme activity such as a typical bell-shaped pro®le. The kinetic model for the lipase-catalysed hydrolysis of olive oil in AOT/isooctane reverse micellar system was applied to the enzymatic reaction in this mixed reverse micellar system. It was found that the predictions of the model agree well with the experimental kinetic results and that the adsorption equilibrium constant of olive oil molecules between the micellar phase and the bulk phase of the organic solvent is smaller in AOT/Tween 85 mixed reverse micellar systems than in simple AOT reverse micellar systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enzymatic activity ofChromobacterium viscosum lipase in an AOT/Tween 85 mixed reverse micellar system

Hossain¹,

Takeyama²,

Hayashi³

et al. 1999

J. Chem. Technol. Biotechnol.

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show abstract

“…The most common nonionic surfactants are those based on EO, referred to as ethoxylated surfactants [11][12][13]. Several classes can be distinguished, including alcohol ethoxylates, alkyl phenol ethoxylates, fatty acid ethoxylates, monoalkaolamide ethoxylates, sorbitan ester ethoxylates, fatty amine ethoxylates, and EO-propylene oxide copolymers (sometimes referred to as polymeric surfactants).…”

Section: Nonionic Surfactantsmentioning

confidence: 99%

Surfactants Used in Formulation of Dispersions

2014

Formulation of Disperse Systems

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“…The most common nonionic surfactants are those based on ethylene oxide, referred to as ethoxylated surfactants [11][12][13]. Several classes can be distinguished: alcohol ethoxylates, alkyl phenol ethoxylates, fatty acid ethoxylates, monoalkaolamide ethoxylates, sorbitan ester ethoxylates, fatty amine ethoxylates and ethylene oxide-propylene oxide copolymers (sometimes referred to as polymeric surfactants).…”

Section: Nonionic Surfactantsmentioning

confidence: 99%

Introduction

2005

Applied Surfactants

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Modified Ethylene Oxide Adducts

Cited by 15 publications

References 21 publications

Enzymatic activity ofChromobacterium viscosum lipase in an AOT/Tween 85 mixed reverse micellar system

Enzymatic activity ofChromobacterium viscosum lipase in an AOT/Tween 85 mixed reverse micellar system

Surfactants Used in Formulation of Dispersions

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