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• W2021425036 abstract "A new type of amperometric cholesterol biosensor based on sol-gel chitosan/silica and multiwalled carbon nanotubes (MWCNTs) organic–inorganic hybrid composite material was developed. The hybrid composite film was used to immobilize cholesterol oxidase on the surface of Prussian blue-modified glass carbon electrode. Effects of some experimental variables such as enzyme loading, concentration of Triton X-100, pH, temperature, and applied potential on the current response of the biosensor were investigated. Analytical characteristics and dynamic parameters of the biosensors with and without MWCNTs in the hybrid film were compared, and the results show that analytical performance of the biosensor can be improved greatly after introduction of the MWCNTs. Response time, sensitivity, linear range, limit of detection (S/N = 3), and apparent Michaelis–Menten constant Km are 25 s, 0.54 μA mM−1, 8.0 × 10−6 to 4.5 × 10−4 M, 4.0 × 10−6 M, and 0.41 mM for the biosensor without MWCNTs and 13 s, 1.55 μA mM−1, 4.0 × 10−6 to 7.0 × 10−4 M, 1.0 × 10−6 M, and 0.24 mM for the biosensor with MWCNTs, respectively. The activation energy of the enzyme-catalyzed reaction was measured to be 42.6 kJ mol−1. This method has been used to determine the free cholesterol concentration in real human blood samples." @default.
• W2021425036 created "2016-06-24" @default.
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• W2021425036 date "2005-02-01" @default.
• W2021425036 modified "2023-10-18" @default.
• W2021425036 title "An amperometric cholesterol biosensor based on multiwalled carbon nanotubes and organically modified sol-gel/chitosan hybrid composite film" @default.
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• W2021425036 doi "https://doi.org/10.1016/j.ab.2004.10.040" @default.
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