Search results for: Woo-Seok Choe

Items from 1 to 20 out of 47 results

article

Interfacial Strain‐Modulated Nanospherical Ni₂P by Heteronuclei‐Mediated Growth on Ti₃C₂T_x MXene for Efficient Hydrogen Evolution

Duong Nguyen Nguyen, Thi Kim Cuong Phu, Jaekyum Kim, Won Tae Hong, more

Small > 18 > 45 > n/a - n/a

Interface modulation of nickel phosphide (Ni₂P) to produce an optimal catalytic activation barrier has been considered a promising approach to enhance the hydrogen production activity via water splitting. Herein, heteronuclei‐mediated in situ growth of hollow Ni₂P nanospheres on a surface defect‐engineered titanium carbide (Ti₃C₂T_x) MXene showing high electrochemical activity for the hydrogen evolution...

article

Interfacial Strain‐Modulated Nanospherical Ni₂P by Heteronuclei‐Mediated Growth on Ti₃C₂T_x MXene for Efficient Hydrogen Evolution (Small 45/2022)

Duong Nguyen Nguyen, Thi Kim Cuong Phu, Jaekyum Kim, Won Tae Hong, more

Small > 18 > 45 > n/a - n/a

Hydrogen Evolution In article number 2204797, Hyeyoung Shin, Jun Young Lee, Jung Kyu Kim, and co‐workers discover heteronuclei‐mediated in situ growth of Ni₂P nanospheres on a defect‐engineered Ti₃C₂T_x MXene induces interfacial strain which leads to charge redistribution and charge transfer, boosting the electrochemical hydrogen evolution reaction.

article

Development of bisphenol A-removing recombinant Escherichia coli by monomeric and dimeric surface display of bisphenol A-binding peptide

Murali Kannan Maruthamuthu, Jiyeon Hong, Kulandaisamy Arulsamy, Sivachandiran Somasundaram, more

Bioprocess and Biosystems Engineering > 2018 > 41 > 4 > 479-487

Peptide-displaying Escherichia coli cells were investigated for use in adsorptive removal of bisphenol A (BPA) both in Luria–Bertani medium including BPA or ATM thermal paper eluted wastewater. Two recombinant strains were constructed with monomeric and dimeric repeats of the 7-mer BPA-binding peptide (KSLENSY), respectively. Greater than threefold increased adsorption of BPA [230.4 µmol BPA per g...

article

Highly sensitive and selective electrochemical cortisol sensor using bifunctional protein interlayer-modified graphene electrodes

Kwang Su Kim, Sung Ryeol Lim, Sung-Eun Kim, Jun Young Lee, more

Sensors and Actuators B: Chemical > 2017 > 242 > C > 1121-1128

Highly accurate and prompt monitoring of cortisol is imperative for the prevention of stress-related diseases. In this study, we present a novel electrochemical biosensor for cortisol detection harnessing an electrochemical sensing platform consisting of a reduced graphene oxide (rGO) electrode, a bifunctional protein interlayer, and an antibody probe that specifically recognizes cortisol molecules...

article

Electrochemical Detection of Lead Ion Based on a Peptide Modified Electrode

Meng Lin, MiSuk Cho, Woo‐Seok Choe, Youngkwan Lee

Electroanalysis > 28 > 5 > 998 - 1002

A novel biosensor harnessing a peptide layer which has specific affinity to lead ion proved to be highly effective for electrochemical analysis of lead ions. The peptide modified electrode was used for the electrochemical analysis of various trace metal ions by square wave voltammetry. Compared to the other ions investigated, the peptide modified electrode was found to be highly selective to Pb²⁺...

article

Electrochemical detection of Bisphenol A with high sensitivity and selectivity using recombinant protein-immobilized graphene electrodes

Kwang Su Kim, Ji-ryang Jang, Woo-Seok Choe, Pil J. Yoo

Biosensors and Bioelectronics > 2015 > 71 > C > 214-221

A novel Bisphenol A (4,4'-isopropylidenediphenol, BPA) sensor was developed harnessing an electrochemical platform comprising a layer-by-layer assembled reduced graphene oxide (rGO) electrode and a designer probe specifically recognizing BPA. The BPA detection probe, a recombinant protein (LacI-BPA), was constructed by fusing a disulfide-constrained high affinity BPA binding peptide (CKSLENSYC) to...

article

Highly sensitive and selective determination of bisphenol-A using peptide-modified gold electrode

Jiao Yang, Sung-Eun Kim, Misuk Cho, Ik-Keun Yoo, more

Biosensors and Bioelectronics > 2014 > 61 > Complete > 38-44

Fast and accurate determination of bisphenol A (BPA) in varying matrices has become important in recent years. In this study, a cysteine-flanked heptapeptide sequence Cys-Lys-Ser-Leu-Glu-Asn-Ser-Tyr-Cys (CKSLENSYC), which is capable of recognizing BPA with high specificity, was isolated using a phage display technique. A novel electrochemical biosensor harnessing this affinity peptide as a BPA detection...

article

Nanomesh‐Structured Ultrathin Membranes Harnessing the Unidirectional Alignment of Viruses on a Graphene‐Oxide Film

Yong Man Lee, Bokyung Jung, Young Hun Kim, A. Reum Park, more

Advanced Materials > 26 > 23 > 3899 - 3904

Ultrathin membranes of M13 viruses are demonstrated. Genetically engineered viruses are first selectively bound on the edges of graphene‐oxide nanosheets. Further applying a shear flow on the assembled viruses results in their unidirectional alignment with a constant interspacing. These unit viral layers are stacked such that each layer is perpendicular to the preceding layer, forming a nanomesh structure,...

article

Purification of O-specific polysaccharide from lipopolysaccharide produced by Salmonella enterica serovar Paratyphi A

Sudeep Kothari, Jeong-Ah Kim, Neha Kothari, Christopher Jones, more

Vaccine > 2014 > 32 > 21 > 2457-2462

The O specific polysaccharide (OSP) of the lipopolysaccharide (LPS) of Salmonella enterica serovar Paratyphi A is a protective antigen and the target for vaccine development. LPS is the major constituent of the outer membrane of S. Paratyphi A with the OSP exposed on the surface, in addition to the cell associated LPS a large amount of free LPS was present in the fermentation broth. A purification...

article

Highly sensitive electrochemical lead ion sensor harnessing peptide probe molecules on porous gold electrodes

Wenqiong Su, MiSuk Cho, Jae-Do Nam, Woo-Seok Choe, more

Biosensors and Bioelectronics > 2013 > 48 > Complete > 263-269

Lead ion is one of the most hazardous and ubiquitous heavy metal pollutants and poses an increasing threat to the environment and human health. This necessitates rapid and selective detection and/or removal of lead ions from various soil and water resources. Recently, we identified several Pb ²⁺ binding peptides via phage display technique coupled with chromatographic biopanning (Nian et al...

article

A novel method for purification of Vi capsular polysaccharide produced by Salmonella enterica subspecies enterica serovar Typhi

Sudeep Kothari, Neha Kothari, Jeong-Ah Kim, Eugene Lee, more

Vaccine > 2013 > 31 > 42 > 4714-4719

Vi capsular polysaccharide is the major component of Vi polysaccharide typhoid vaccines. Vi is synthesized during growth of Salmonella enterica subspecies enterica serovar Typhi and is released into the fermentation broth in large quantities. Along with the Vi considerable amounts of impurities consisting of bacterial protein, nucleic acid and lipopolysaccharide (LPS) as well as media components contaminate...

article

Electrochemical detection of HER2 using single stranded DNA aptamer modified gold nanoparticles electrode

Limin Chun, Sung-Eun Kim, Misuk Cho, Woo-seok Choe, more

Sensors & Actuators: B. Chemical > 2013 > 186 > Complete > 446-450

In the present study, a novel impedance aptasensor was developed by immobilizing HER2 (human epidermal growth factor receptor 2)-specific single stranded DNA aptamer onto the monolayer of 3-mercaptopropionic acid self-assembled on gold nanoparticles electrode. The efficiency of each electrode modification step and the performance of thus constructed aptasenor were assessed by impedance spectroscopy...

article

Aptamer‐Assisted Gold Nanoparticles/PEDOT Platform for Ultrasensitive Detection of LPS

Wenqiong Su, MiSuk Cho, Jae‐Do Nam, Woo‐Seok Choe, more

Electroanalysis > 25 > 2 > 380 - 386

Neatly arranged gold nanoparticles (AuNPs) were directly electrodeposited on an electrochemically polymerized self‐assembled monolayer (SAM) of thiol‐functionalized 3,4‐ethylenedioxythiophene (EDOT) derivative, EDTMSHA. A thiolated single‐stranded DNA (ssDNA) aptamer with high specificity to LPS was immobilized on the AuNPs/conducting polymer composite film, serving as sensing platform for LPS detection...

article

Selective Lead Adsorption by Recombinant Escherichia coli Displaying a Lead-Binding Peptide

Thuong T. L. Nguyen, Hae Ryong Lee, Soon Ho Hong, Ji-Ryang Jang, more

Applied Biochemistry and Biotechnology > 2013 > 169 > 4 > 1188-1196

A highly specific lead-binding peptide ThrAsnThrLeuSerAsnAsn was displayed on Escherichia coli, and lead adsorption characteristics of the recombinant bacteria were investigated. Cell surface-displayed peptide was expressed under the control of an arabinose promoter using outer membrane protein C (OmpC_t) as an anchoring motif. The optimal induction period and arabinose concentration for the expression...

article

The interplay of peptide sequence and local structure in TiO2 biomineralization

Noori Choi, Lihan Tan, Ji-ryang Jang, Yu Mi Um, more

Journal of Inorganic Biochemistry > 2012 > 115 > Complete > 20-27

Using cyclic constrained TiO ₂ binding peptides STB1 (CHKKPSKSC), RSTB1 (CHRRPSRSC) and linear peptide LSTB1 (AHKKPSKSA), it was shown that while affinity of the peptide to TiO ₂ is essential to enable TiO ₂ biomineralization, other factors such as biomineralization kinetics and peptide local structure need to be considered to predict biomineralization efficacy. Cyclic and...

article

Peptide affinity to TiO2 is necessary but not sufficient for prediction of its biomineralizing efficacy

Noori Choi, Young Jun Kim, Chang-Hoon Nam, Minjin Cha, more

New BIOTECHNOLOGY > 2012 > 29 > Supplement > S61-S62

article

Screening of lipopolysaccharide binding DNA aptamer and its application to fabricating electrochemical aptasensor

Sung-Eun Kim, Dong-Kwan Kim, Ah-Rum Han, Woo-Seok Choe

New BIOTECHNOLOGY > 2012 > 29 > Supplement > S169

article

Fabrication of nanorod shaped TiO2 using modified f88 bacteriophage

Ji-Ryang Jang, Young-Jun Kim, Chang-Hoon Nam, Hee-Yeon Kim, more

New BIOTECHNOLOGY > 2012 > 29 > Supplement > S58

article

The effect of protein aggregate size on the kinetics of refolding using chaperone cocktail

Yu Mi Um, Jisun Oh, Jung Woo Shin, Woo Seok Choe

New BIOTECHNOLOGY > 2012 > 29 > Supplement > S217

article

Harnessing aptamers for electrochemical detection of endotoxin

Sung-Eun Kim, Wenqiong Su, MiSuk Cho, Youngkwan Lee, more

Analytical Biochemistry > 2012 > 424 > 1 > 12-20

Lipopolysaccharide (LPS), also known as endotoxin, triggers a fatal septic shock; therefore, fast and accurate detection of LPS from a complex milieu is of primary importance. Several LPS affinity binders have been reported so far but few of them have proved their efficacy in developing electrochemical sensors capable of selectively detecting LPS from crude biological liquors. In this study, we identified...

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INFONA - science communication portal

Search results for: Woo-Seok Choe

Interfacial Strain‐Modulated Nanospherical Ni₂P by Heteronuclei‐Mediated Growth on Ti₃C₂T_x MXene for Efficient Hydrogen Evolution

Interfacial Strain‐Modulated Nanospherical Ni₂P by Heteronuclei‐Mediated Growth on Ti₃C₂T_x MXene for Efficient Hydrogen Evolution (Small 45/2022)

Development of bisphenol A-removing recombinant Escherichia coli by monomeric and dimeric surface display of bisphenol A-binding peptide

Highly sensitive and selective electrochemical cortisol sensor using bifunctional protein interlayer-modified graphene electrodes

Electrochemical Detection of Lead Ion Based on a Peptide Modified Electrode

Electrochemical detection of Bisphenol A with high sensitivity and selectivity using recombinant protein-immobilized graphene electrodes

Highly sensitive and selective determination of bisphenol-A using peptide-modified gold electrode

Nanomesh‐Structured Ultrathin Membranes Harnessing the Unidirectional Alignment of Viruses on a Graphene‐Oxide Film

Purification of O-specific polysaccharide from lipopolysaccharide produced by Salmonella enterica serovar Paratyphi A

Highly sensitive electrochemical lead ion sensor harnessing peptide probe molecules on porous gold electrodes

A novel method for purification of Vi capsular polysaccharide produced by Salmonella enterica subspecies enterica serovar Typhi

Electrochemical detection of HER2 using single stranded DNA aptamer modified gold nanoparticles electrode

Aptamer‐Assisted Gold Nanoparticles/PEDOT Platform for Ultrasensitive Detection of LPS

Selective Lead Adsorption by Recombinant Escherichia coli Displaying a Lead-Binding Peptide

The interplay of peptide sequence and local structure in TiO2 biomineralization

Peptide affinity to TiO2 is necessary but not sufficient for prediction of its biomineralizing efficacy

Screening of lipopolysaccharide binding DNA aptamer and its application to fabricating electrochemical aptasensor

Fabrication of nanorod shaped TiO2 using modified f88 bacteriophage

The effect of protein aggregate size on the kinetics of refolding using chaperone cocktail

Harnessing aptamers for electrochemical detection of endotoxin

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