Reaction kinetic studies on the immobilized-lipase catalyzed enzymatic resolution of 1-phenylethanol transesterification with ethyl butyrate

2020 ◽  
pp. 1-12
Author(s):  
Weican Wang ◽  
Ling Li ◽  
Xiaoda Wang ◽  
Ting Qiu ◽  
Jianhao Yang ◽  
...  
Keyword(s):  
Reaction Kinetic ◽  
Immobilized Lipase ◽  
Kinetic Studies ◽  
Ethyl Butyrate ◽  
Enzymatic Resolution

Facile synthesis of gemini surface-active ATRP initiator and its use in soap-free AGET ATRP mini-emulsion polymerisation

2013 ◽  
Vol 67 (3) ◽  
Author(s):  
Chuan Cheng ◽  
Quan Fu ◽  
Xiong Bai ◽  
Shao Liu ◽  
Liang Shen ◽  
...  
Keyword(s):  
Gemini Surfactant ◽  
Reaction Kinetic ◽  
Total Yield ◽  
Kinetic Studies ◽  
Facile Synthesis ◽  
Aget Atrp ◽  
Cationic Gemini Surfactant ◽  
Emulsion Polymerisation ◽  
Radical Polymerisation ◽  
Surface Active

AbstractA novel cationic gemini surfactant has been readily synthesised in 70 % total yield. The functional gemini surfactant can act both as an emulsifier and an atom transfer radical polymerisation (ATRP) initiator in mini-emulsion polymerisation of methyl methacrylate (MMA), in which no other emulsifier was required. 1-(Dimethylamino)dodecane (N,N-dimethyldodecylamine, DMDA) was found to be a good ligand in the activator generated by electron transfer (AGET) ATRP reaction. Kinetic studies indicated that the polymerisation featured controlled/living radical polymerisation.

Photocatalytic Degradation of Methyl Orange by TiO2/Schorl Photocatalyst: Kinetics and Thermodynamics

2015 ◽  
Vol 713-715 ◽  
pp. 2789-2792
Author(s):  
Huan Yan Xu ◽  
Xue Li ◽  
Yan Li ◽  
Ping Li ◽  
Wei Chao Liu
Keyword(s):  
Methyl Orange ◽  
Reaction Rate ◽  
Reaction Kinetic ◽  
Kinetic Studies ◽  
Reaction Rate Constant ◽  
Order Reaction ◽  
Solution Ph ◽  
Kinetics And Thermodynamics ◽  
Hoff Equation ◽  
Degradation Of Methyl Orange

An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the photocatalytic activity of TiO2/schorl composite and the kinetics and thermodynamics of this process was emphasized in this work. Langmuir–Hinshelwood kinetic model was employed for the kinetic studies and the results revealed that the process of MO photocatalytic discoloration by TiO2/schorl composite followed one order reaction kinetic equation under different conditions. The reaction rate constant (k) increased with initial MO concentration decreasing. When the catalyst dosage or solution pH increased,kvalues increased and then decreased. The possible reasons for these phenomena were discussed. Finally, the thermodynamic parameters ΔG, ΔH, ΔSwere obtained by the classical Van't Hoff equation.

scholarly journals Biosynthesis of ethyl butyrate with immobilized Candida rugosa lipase onto modified Eupergit®C

Biocatalysis ◽  
2014 ◽  
Vol 1 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Daniele Spinelli ◽  
Simone Coppi ◽  
Riccardo Basosi ◽  
Rebecca Pogni
Keyword(s):  
Immobilized Lipase ◽  
Candida Rugosa ◽  
Product Yield ◽  
Candida Rugosa Lipase ◽  
Maximum Activity ◽  
Ethyl Butyrate ◽  
Molar Ratio ◽  
Practical Applications ◽  
Solvent Free Conditions ◽  
Immobilized Candida Rugosa Lipase

AbstractLipase from Candida rugosa was immobilized onto the modified Eupergit®C. The support was treated with ethylenediamine and subsequently activated with glutaraldehyde. Enzyme immobilization efficiency was 85%. The optimum pH was close to 6.5 for both the free and immobilized lipase. Immobilized lipase retained its maximum activity in a temperature range of 55 – 60°C. Subsequently, ethyl butyrate synthesis was investigated using immobilized enzyme by esterification of butyric acid with ethanol in solvent-free conditions (23% product yield) and using hexane as a solvent (65% product yield). The acid-alcohol molar ratio and different enzyme amounts were tested as efficient reaction parameters. The biocatalyst maintained 60% of its activity when reused in 8 successive batch reactions in organic solvent. Therefore, the immobilized lipase has demonstrated its potential in practical applications such as short-chain ester synthesis for the food industry.

scholarly journals Molecular Docking and Reaction Kinetic Studies of Chrysin Binding to Serum Albumin

2014 ◽  
Vol 9 (2) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Bingli Jiang ◽  
Anran Zhao ◽  
Jianhua Miao ◽  
Pengfei Chang ◽  
Hailin Chen ◽  
...  
Keyword(s):  
Molecular Docking ◽  
Serum Albumin ◽  
Reaction Kinetic ◽  
Reaction Order ◽  
Kinetic Studies ◽  
Cd Spectroscopy ◽  
Reaction Enthalpy ◽  
Binding Properties ◽  
Hydrophobic Force ◽  
Physiological Conditions

The binding properties of chrysin with serum albumin (SA) were investigated under physiological conditions by calorimetry, circular dichroism (CD) spectroscopy, and molecular modeling. Based on the thermodynamic data, molar reaction enthalpy, reaction order ( n) and the rate constant ( k) were calculated. The results of CD spectroscopy showed that chrysin could bind to SA and the conformation of SA did not have any high-ordered structural change. Computational mapping revealed chrysin binding to the subdomain IB in SA. The chrysin-serum albumin complex was stabilized by hydrophobic force and hydrogen bonding and the reaction was a spontaneous process.

Reactive processing of acrylic-polyurea interpenetrating networks: reaction kinetic studies

2001 ◽  
Vol 50 (9) ◽  
pp. 1035-1045 ◽  
Author(s):  
John L Stanford ◽  
Anthony J Ryan ◽  
Ying Yang
Keyword(s):  
Reaction Kinetic ◽  
Kinetic Studies ◽  
Reactive Processing ◽  
Interpenetrating Networks

ChemInform Abstract: Total Synthesis of (-)-Oudemansin X (IX) Based on Enzymatic Resolution Using Immobilized Lipase.

ChemInform ◽  
2010 ◽  
Vol 24 (40) ◽  
pp. no-no
Author(s):  
H. AKITA ◽  
I. UMEZAWA ◽  
M. NOZAWA ◽  
S. NAGUMO
Keyword(s):  
Total Synthesis ◽  
Immobilized Lipase ◽  
Enzymatic Resolution
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