A NOBLE MOLECULAR IMPRINT POLYMER BIOSENSOR FOR CAFFEIC ACID DETECTION IN ORTHOSIPHON STAMINEUS EXTRACTS

2015 ◽  
Vol 77 (7) ◽  
Author(s):  
A.K.M. Shafiqul Islam ◽  
Hemavathi Krishnan ◽  
Harbant Singh ◽  
Mohd Noor Ahmad
Keyword(s):  
Caffeic Acid ◽  
Quartz Crystal ◽  
Frequency Change ◽  
Good Sensitivity ◽  
Imprint Polymer ◽  
Molecular Imprint Polymer ◽  
Orthosiphon Stamineus ◽  
Monomer Ratio ◽  
Quartz Crystal Microbalance Sensor ◽  
Molecular Imprint

A molecular imprint polymer (MIP) biosensor has been developed to determine caffeic acid in misai kucing (Orthosiphon stamineus) samples. The simulation of HyperChem 8.0 software gave a suitable template and functional monomer ratio for the MIP preparation. The MIPs were prepared by non-covalent bulk polymer approach. The analytical performance of MIP and NIP studies were based on the frequency change of mass sensitive quartz crystal microbalance sensor. The MIP biosensor showed good sensitivity to caffeic acid from 1.5 ng/ml - 12.5 ng/ml with a R2 value of 0.98 whereas NIP sensor showed very low response. The caffeic acid in O. stamineus extract and two commercial products were quantified using the MIP biosensor

A Novel Molecular Imprint Polymer Quartz Crystal Microbalance Nanosensor for the Detection of Andrographolide in the Medicinal Plant Extract

2021 ◽  
Vol 57 (6) ◽  
pp. 671-679
Author(s):  
A. K. M. Shafiqul Islam ◽  
Hemavathi Krishnan ◽  
Mohd Noor Ahmad ◽  
Pubalan Nadaraja ◽  
A. B. M. Helal Uddin
Keyword(s):  
Medicinal Plant ◽  
Quartz Crystal Microbalance ◽  
Plant Extract ◽  
Quartz Crystal ◽  
Imprint Polymer ◽  
Molecular Imprint Polymer ◽  
Molecular Imprint

Designing and Preclinical Evaluation of a Molecular Imprint Polymer-Based Cocaine Odor Mimic for Conditioning Detection Dogs

2022 ◽  
Vol 18 (1) ◽  
pp. 171-181
Author(s):  
Alonso Sierra-Res ◽  
Berenice Robles-Her ◽  
María J. Bernad- ◽  
Roberto Día ◽  
Sheila I. Peñ ◽  
...  
Keyword(s):  
Imprint Polymer ◽  
Molecular Imprint Polymer ◽  
Preclinical Evaluation ◽  
Molecular Imprint

Solvent Effect on Morphology of Polystyrene Coating and their Role to Improvement for Biomolecule Immobilization in Application of QCM Based Biosensor

2014 ◽  
Vol 530-531 ◽  
pp. 54-57 ◽  
Author(s):  
Masruroh ◽  
D.J.D.H. Djoko ◽  
Lalu A. Didik ◽  
Eka Rahmawati ◽  
Masdiana Pagaga ◽  
...  
Keyword(s):  
Spin Coating ◽  
Surface Coating ◽  
Quartz Crystal ◽  
Frequency Change ◽  
Polystyrene Surface ◽  
Biomolecule Immobilization ◽  
Polystyrene Solution ◽  
Quartz Crystal Microbalance Sensor ◽  
Result Show ◽  
Coating Method

This research is focused on the synthesis of a polystiren layer for biosensors based on a Quartz Crystal Microbalance sensor (QCM) to immobilize the biomolecule. The polystyrene thin film was deposited by means of spin coating method with various solvents, such as chloroform, toluene, xylene, and tetrahydrofuran (THF), containing a 3% polystyrene solution by mass. The morphologies of the polystyrene layers were observed via SEM/EDx. The polystyrene surface coated using chloroform as the solvent has a rougher morphology and the largest diameter pores compared with the other solvents. The result show the polystyrene surface coating produced with chloroform caused a higher frequency change, which resulted in the binding of a wider range of biomolecules.

Quartz Crystal Microbalance Sensor Using Ionophore for Ammonium Ion Detection

2012 ◽  
Vol 12 (1) ◽  
pp. 563-567 ◽  
Author(s):  
Yasuhiro Kosaki ◽  
Kosuke Takano ◽  
Daniel Citterio ◽  
Koji Suzuki ◽  
Seimei Shiratori
Keyword(s):  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Ammonium Ion ◽  
Ion Detection ◽  
Quartz Crystal Microbalance Sensor

scholarly journals Low-fouling CNT-PEG-hydrogel coated quartz crystal microbalance sensor for saliva glucose detection

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 22556-22564
Author(s):  
Shiwen Wang ◽  
Guanjiang Liu ◽  
Bei Yang ◽  
Zifeng Zhang ◽  
Debo Hu ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Binding Sites ◽  
Quartz Crystal ◽  
Direct Detection ◽  
Glucose Detection ◽  
Hydrogel Film ◽  
Glucose Binding ◽  
Quartz Crystal Microbalance Sensor

We successfully achieved the direct detection of saliva glucose by a CNT-PEG-hydrogel. The top CNT-PEG layer provides channels for transporting glucose molecules and filters macromolecular impurities and the bottom base PBA-hydrogel film provides the glucose binding sites.

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