Horseradish-peroxidase-catalyzed polymerization of amphiphilic tyrosine derivatives in micelles

1998 ◽  
Author(s):  
Rupmoni Sarma ◽  
Shridhara Alva ◽  
Kenneth A. Marx ◽  
Joseph A. Akkara ◽  
David L. Kaplan ◽  
...  
Keyword(s):  
Horseradish Peroxidase ◽  
Tyrosine Derivatives ◽  
Catalyzed Polymerization

Horseradish peroxidase-catalyzed polymerization of l -DOPA for mono-/bi-enzyme immobilization and amperometric biosensing of H 2 O 2 and uric acid

Talanta ◽  
2016 ◽  
Vol 149 ◽  
pp. 117-123 ◽  
Author(s):  
Mengzhen Dai ◽  
Ting Huang ◽  
Long Chao ◽  
Qingji Xie ◽  
Yueming Tan ◽  
...  
Keyword(s):  
Uric Acid ◽  
Horseradish Peroxidase ◽  
Enzyme Immobilization ◽  
Catalyzed Polymerization

Horseradish Peroxidase-Catalyzed Polymerization of Cardanol in the Presence of Redox Mediators

2004 ◽  
Vol 5 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Keehoon Won ◽  
Yong Hwan Kim ◽  
Eun Suk An ◽  
Yeon Soo Lee ◽  
Bong Keun Song
Keyword(s):  
Horseradish Peroxidase ◽  
Redox Mediators ◽  
Catalyzed Polymerization

scholarly journals Chronopotentiometric aptasensing with signal amplification based on enzyme-catalyzed surface polymerization

2020 ◽  
Vol 56 (87) ◽  
pp. 13355-13358 ◽  
Author(s):  
Shuwen Liu ◽  
Jiawang Ding ◽  
Wei Qin
Keyword(s):  
Horseradish Peroxidase ◽  
Signal Amplification ◽  
Membrane Surface ◽  
Surface Polymerization ◽  
Binding Event ◽  
Selective Membrane ◽  
Target Binding ◽  
Amplification Strategy ◽  
Catalyzed Polymerization

A signal amplification strategy based on the horseradish peroxidase catalyzed polymerization of dopamine on a polymeric ion-selective membrane surface is proposed for the sensitive chronopotentiometric detection of an aptamer–target binding event.

Improving lignin removal from pre-hydrolysis liquor by horseradish peroxidase-catalyzed polymerization

2019 ◽  
Vol 212 ◽  
pp. 273-279 ◽  
Author(s):  
Zongquan Li ◽  
Chenglong Qiu ◽  
Jijie Gao ◽  
Haowei Wang ◽  
Fu yingjuan ◽  
...  
Keyword(s):  
Horseradish Peroxidase ◽  
Lignin Removal ◽  
Catalyzed Polymerization

Reactivity of syringyl quinone methide intermediates in dehydrogenative polymerization. Part 2: pH effect in horseradish peroxidase-catalyzed polymerization of sinapyl alcohol

Holzforschung ◽  
2010 ◽  
Vol 64 (2) ◽  
Author(s):  
Yuki Tobimatsu ◽  
Toshiyuki Takano ◽  
Hiroshi Kamitakahara ◽  
Fumiaki Nakatsubo
Keyword(s):  
Horseradish Peroxidase ◽  
Uv Spectroscopy ◽  
Ph Effect ◽  
Water Soluble ◽  
Quinone Methide ◽  
Photodiode Array Detection ◽  
Sinapyl Alcohol ◽  
Acidic Conditions ◽  
Dehydrogenative Polymerization ◽  
Catalyzed Polymerization

Abstract The solvent pH effect in the horseradish peroxidase (HRP)-catalyzed polymerization of sinapyl alcohol (S-alc) and analogously, sinapyl alcohol γ-O-glucoside (isosyringin, iso-S) was investigated particularly focusing on the behavior of syringyl-type quinone methide intermediates (S-type QMs) under acidic conditions. At first, the HRP-catalyzed polymerization of iso-S at pH 6.5–2.5, which produces water-soluble dehydrogenation polymer (DHP) intermediates in a homogeneous phase, was monitored by UV spectroscopy and gel permeation chromatography with photodiode array detection (GPC-PDA). Under acidic conditions at pH below 4.5, unstablilized S-type QMs from iso-S are rapidly quenched resulting in efficient productions of DHPs, although substantial loss of HRP activity and the resulting insufficient polymerization were inevitable at pH below 3.5. In addition, it was found that a small addition of guaiacyl-type comonomer (isoconiferin, iso-G) effectively promotes the polymerization of iso-S under acidic conditions, in which the comonomer serves as a radical mediator to facilitate the HRP-catalyzed oxidations of iso-S. Next, the HRP-catalyzed polymerization of S-alc at various pH values was conducted and the resulting DHPs were characterized by GPC and NMR measurements. The yields of isolated DHPs significantly increased as solvent pH decreased below 4.5. The structural analyses of the DHPs demonstrated that reaction selectivity of S-type QMs during the polymerization drastically changed at pH below 4.5: they react efficiently with water molecules as solvent leading to the formation of benzyl alcohol type β-O-4 substructures preferentially to the formation of α-O-aryl type substructures. Consequently, the data in this study demonstrated that acidic conditions at pH below 4.5 are favored in the dehydrogenative polymerization of S-alc from the viewpoint of the reactivity of S-type QMs.

Fully Biobased Oligophenolic Nanoparticle Prepared by Horseradish Peroxidase-catalyzed Polymerization

2016 ◽  
Vol 45 (6) ◽  
pp. 631-633 ◽  
Author(s):  
Hironori Izawa ◽  
Yuka Miyazaki ◽  
Shinsuke Ifuku ◽  
Minoru Morimoto ◽  
Hiroyuki Saimoto
Keyword(s):  
Horseradish Peroxidase ◽  
Catalyzed Polymerization
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