CaO/NaA combined with enzymatic catalyst for biodiesel transesterification

2012 ◽  
Vol 28 ◽  
pp. 52-57 ◽  
Author(s):  
Jing Li ◽  
Hui Xu ◽  
Zhong An Fei ◽  
Huan Liu ◽  
Dai Rong Qiao ◽  
...  
Keyword(s):  
Enzymatic Catalyst

An off/on thrombin activated energy driven molecular machine for sensitive detection of human thrombin via non-enzymatic catalyst recycling amplification

The Analyst ◽  
2020 ◽  
Vol 145 (21) ◽  
pp. 6868-6874 ◽  
Author(s):  
Zhang Zhang ◽  
Min Mei ◽  
Juan Yao ◽  
Ting Ye ◽  
Jing Quan ◽  
...  
Keyword(s):  
Displacement Reaction ◽  
Strand Displacement ◽  
Catalyst Recycling ◽  
Enzyme Catalyst ◽  
Human Thrombin ◽  
Dna Machine ◽  
Recycling Amplification ◽  
Amplification Strategy ◽  
Enzymatic Catalyst ◽  
Strand Displacement Reaction

A novel dual signal on/off amplification strategy by integrating thrombin mediated strand displacement reaction and non-enzyme catalyst recycling DNA machine.

scholarly journals Myeloperoxidase Functions as a Major Enzymatic Catalyst for Initiation of Lipid Peroxidation at Sites of Inflammation

2002 ◽  
Vol 277 (48) ◽  
pp. 46116-46122 ◽  
Author(s):  
Renliang Zhang ◽  
Marie-Luise Brennan ◽  
Zhongzhou Shen ◽  
Jennifer C. MacPherson ◽  
Dave Schmitt ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Enzymatic Catalyst

Polymerization of a water soluble glucose vinyl ester monomer with tensoactive properties synthesized by enzymatic catalyst

2009 ◽  
Vol 29 (2) ◽  
pp. 519-523 ◽  
Author(s):  
Maurício Rodrigues Borges ◽  
Jaciara Alves dos Santos ◽  
Mariane Vieira ◽  
Rosangela Balaban
Keyword(s):  
Vinyl Ester ◽  
Water Soluble ◽  
Enzymatic Catalyst

Renewable boronic acid affiliated glycerol nano-adsorbents for recycling enzymatic catalyst in biodiesel fuel production

2018 ◽  
Vol 54 (88) ◽  
pp. 12475-12478 ◽  
Author(s):  
Lei Liu ◽  
Gaojian Ma ◽  
Min Zeng ◽  
Wei Du ◽  
Jinying Yuan
Keyword(s):  
Silica Nanoparticles ◽  
Boronic Acid ◽  
Biodiesel Production ◽  
Biodiesel Fuel ◽  
Release Behavior ◽  
Ph Responsive ◽  
Fuel Production ◽  
Enzymatic Catalyst

Renewable boronic acid affiliated silica nanoparticles exhibit pH-responsive glycerol adsorption/release behavior to recycle free lipases in biodiesel production.

scholarly journals Selectivity and Sustainability of Electroenzymatic Process for Glucose Conversion to Gluconic Acid

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 269 ◽  
Author(s):  
Miroslava Varničić ◽  
Iva N. Zasheva ◽  
Edgar Haak ◽  
Kai Sundmacher ◽  
Tanja Vidaković-Koch
Keyword(s):  
Gluconic Acid ◽  
High Selectivity ◽  
Product Formation ◽  
Cathode Side ◽  
Resonance Spectroscopy ◽  
Renewable Feedstocks ◽  
Mode Of Operation ◽  
Space Time Yield ◽  
Ion Pumping ◽  
Enzymatic Catalyst

Electroenzymatic processes are interesting solutions for the development of new processes based on renewable feedstocks, renewable energies, and green catalysts. High-selectivity and sustainability of these processes are usually assumed. In this contribution, these two aspects were studied in more detail. In a membrane-less electroenzymatic reactor, 97% product selectivity at 80% glucose conversion to gluconic acid was determined. With the help of nuclear magnetic resonance spectroscopy, two main side products were identified. The yields of D-arabinose and formic acid can be controlled by the flow rate and the electroenzymatic reactor mode of operation (fuel cell or ion-pumping). The possible pathways for the side product formation have been discussed. The electroenzymatic cathode was found to be responsible for a decrease in selectivity. The choice of the enzymatic catalyst on the cathode side led to 100% selectivity of gluconic acid at somewhat reduced conversion. Furthermore, sustainability of the electroenzymatic process is estimated based on several sustainability indicators. Although some indicators (like Space Time Yield) are favorable for electroenzymatic process, the E-factor of electroenzymatic process has to improve significantly in order to compete with the fermentation process. This can be achieved by an increase of a cycle time and/or enzyme utilization which is currently low.

Influence of pervaporation process parameters on enzymatic catalyst deactivation

Desalination ◽  
2004 ◽  
Vol 162 ◽  
pp. 307-313 ◽  
Author(s):  
Z Koszorz ◽  
N Nemestothy ◽  
Z Ziobrowski ◽  
K Belafi-Bako ◽  
R Krupiczka
Keyword(s):  
Process Parameters ◽  
Catalyst Deactivation ◽  
Enzymatic Catalyst

scholarly journals Esterification of acetic acid with alcohol isoamyl in the presence of enzymatic catalyst

2019 ◽  
Vol 19 (2) ◽  
pp. 225-242
Author(s):  
Nádia Ligianara Nyari ◽  
Alessandro Rogerio Paulazzi ◽  
Raquel Vera Zamadei ◽  
Jamile Zeni ◽  
Rogério Marcos Dallago
Keyword(s):  
Acetic Acid ◽  
Reaction Time ◽  
Food Industry ◽  
Immobilized Lipase ◽  
Isoamyl Alcohol ◽  
Isoamyl Acetate ◽  
Ester Synthesis ◽  
Immobilized Catalyst ◽  
Ultrasound System ◽  
Enzymatic Catalyst

The Candida antarctica Lipase B immobilized on polyurethane catalysed esterification of acetic acid with isoamyl alcohol in mechanical and ultrasonic system in a system solvent-free, was studied. The maximum esterification of isoamyl acetate used immobilized catalyst was the highest esterification, 666.05 U/g with 19 cycles of reuse after 360 minutes of reaction time in mechanical system and 1319.48 U/g was observed and 14 cycles de reuse after 60 minutes of reaction time in ultrasound system. Thus, the process was considered efficient with significant reduction of the reaction time, low instrumental requirements and improve the bioprocess performance. Until now, there were no studies available in the open literature in relation to the ester synthesis catalyzed by immobilized Lipase in polyurethane as support in the ultrasound system. In addition, considered an environmentally correct and economically viable technology, it can be used in cosmetics, pharmaceuticals and food industry.

Construction from Destruction: Hydrogel Formation from Triggered Depolymerization-Based Release of an Enzymatic Catalyst

2020 ◽  
Vol 9 (3) ◽  
pp. 377-381 ◽  
Author(s):  
Vikash Kumar ◽  
Justin T. Harris ◽  
Alexander Ribbe ◽  
Marina Franc ◽  
Youngju Bae ◽  
...  
Keyword(s):  
Hydrogel Formation ◽  
Enzymatic Catalyst
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