Development of Recyclable Magnetic Cross Linked Enzyme Aggregates for the Synthesis of High Value Rare Sugar D-Tagatose in Aqueous Phase Catalysis

2021 ◽  
Author(s):  
Shushil Rai ◽  
Varun Kumar ◽  
Sudesh Yadav
Keyword(s):  
Aqueous Phase ◽  
Rare Sugar ◽  
Arabinose Isomerase ◽  
Aqueous Phase Catalysis

In this study, a high value rare sugar D-Tagatose was synthesized using recyclable magnetic catalysts. The magnetic cross linked enzyme aggregate (mCLEA) of L-Arabinose isomerase (L-AI) was developed for the...

Hydroformylation by supported aqueous-phase catalysis: a new class of heterogeneous catalysts

Nature ◽  
1989 ◽  
Vol 339 (6224) ◽  
pp. 454-455 ◽  
Author(s):  
Juan P. Arhancet ◽  
Mark E. Davis ◽  
Joseph S. Merola ◽  
Brian E. Hanson
Keyword(s):  
Aqueous Phase ◽  
Heterogeneous Catalysts ◽  
New Class ◽  
Supported Aqueous Phase ◽  
Aqueous Phase Catalysis

New water soluble chelating phosphines for aqueous phase catalysis

1997 ◽  
Vol 124 (1) ◽  
pp. 21-28 ◽  
Author(s):  
Hao Ding ◽  
Jianxing Kang ◽  
Brian E. Hanson ◽  
Christian W. Kohlpaintner
Keyword(s):  
Aqueous Phase ◽  
Water Soluble ◽  
Chelating Phosphines ◽  
Aqueous Phase Catalysis

Hydrocarboxylation of olefins by supported aqueous-phase catalysis

2015 ◽  
Vol 247 ◽  
pp. 147-154 ◽  
Author(s):  
Zhenhong He ◽  
Zhenshan Hou ◽  
Yagang Zhang ◽  
Tianfu Wang ◽  
Yierxiati Dilixiati ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Supported Aqueous Phase ◽  
Aqueous Phase Catalysis

scholarly journals A Three-Step Process for the Bioconversion of Whey Permeate into a Glucose-Free D-Tagatose Syrup

Catalysts ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 647 ◽  
Author(s):  
Fadia V. Cervantes ◽  
Sawssan Neifar ◽  
Zoran Merdzo ◽  
Javier Viña-Gonzalez ◽  
Lucia Fernandez-Arrojo ◽  
...  
Keyword(s):  
Bacillus Stearothermophilus ◽  
Cheese Whey ◽  
Bifidobacterium Bifidum ◽  
Rare Sugar ◽  
Experimental Conditions ◽  
Whey Permeate ◽  
Mild Conditions ◽  
Stage Process ◽  
Short Time ◽  
Arabinose Isomerase

We have developed a sustainable three-stage process for the revaluation of cheese whey permeate into D-tagatose, a rare sugar with functional properties used as sweetener. The experimental conditions (pH, temperature, cofactors, etc.) for each step were independently optimized. In the first step, concentrated whey containing 180–200 g/L of lactose was fully hydrolyzed by β-galactosidase from Bifidobacterium bifidum (Saphera®) in 3 h at 45 °C. Secondly, glucose was selectively removed by treatment with Pichia pastoris cells for 3 h at 30 °C. The best results were obtained with 350 mg of cells (previously grown for 16 h) per mL of solution. Finally, L-arabinose isomerase US100 from Bacillus stearothermophilus was employed to isomerize D-galactose into D-tagatose at pH 7.5 and 65 °C, in presence of 0.5 mM MnSO4. After 7 h, the concentration of D-tagatose was approximately 30 g/L (33.3% yield, referred to the initial D-galactose present in whey). The proposed integrated process takes place under mild conditions (neutral pH, moderate temperatures) in a short time (13 h), yielding a glucose-free syrup containing D-tagatose and galactose in a ratio 1:2 (w/w).

Supported aqueous phase catalysis: a new kinetic model of hydroformylation of octene in a gas–liquid–liquid–solid system

2003 ◽  
Vol 79-80 ◽  
pp. 409-417 ◽  
Author(s):  
U.J. Jáuregui-Haza ◽  
E. Pardillo-Fontdevila ◽  
Ph. Kalck ◽  
A.M. Wilhelm ◽  
H. Delmas
Keyword(s):  
Kinetic Model ◽  
Aqueous Phase ◽  
Supported Aqueous Phase ◽  
Solid System ◽  
Aqueous Phase Catalysis

d-Glucosamine based-phosphine for Suzuki-Miyaura cross-coupling reactions in the supported aqueous phase catalysis system

2012 ◽  
Vol 53 (42) ◽  
pp. 5602-5604 ◽  
Author(s):  
Karolina Wójcik ◽  
Catherine Goux-Henry ◽  
Bruno Andrioletti ◽  
K. Michał Pietrusiewicz ◽  
Eric Framery
Keyword(s):  
Aqueous Phase ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Supported Aqueous Phase ◽  
Aqueous Phase Catalysis

ChemInform Abstract: D-Glucosamine Based-Phosphine for Suzuki-Miyaura Cross-Coupling Reactions in the Supported Aqueous Phase Catalysis System.

ChemInform ◽  
2013 ◽  
Vol 44 (5) ◽  
pp. no-no
Author(s):  
Karolina Wojcik ◽  
Catherine Goux-Henry ◽  
Bruno Andrioletti ◽  
K. Michal Pietrusiewicz ◽  
Eric Framery
Keyword(s):  
Aqueous Phase ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Supported Aqueous Phase ◽  
Aqueous Phase Catalysis
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