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090 _aB-14755
245 1 0 _aStudy and Development of Multilayer Needle-type Enzyme-based Glucose Microsensors
490 0 _vBiosensors, 4(1), p.27-40, 1989
520 3 _aGlucose oxidase (GOD)was covalently coupled to a cellulose acetate (CA)layer, using bovine serum albumin (BSA)and parabenzoquinone (PBQ)linkages, Prior to GOD coupling this CA layer was deposited on the platinum tip of a needle-type sensor and covered with an outer layer of polyurethane (PU). Such microsensors were found to be active, their GOD load reaching 1.6 to 3.0 pg mm-' and their glucose response reaching I to 3 PA M-' mme2, even when the upper limit of their linear range reached IO-30 mM. Due to the multilayer structure and composition of these micro- sensors, small anions such as ascorbate were partially discriminated from neutral molecules such as hydrogen peroxide. When implanted sub- cutaneously in anaesthetized rats, sensor responses correlated correctly with blood glucose concentration but presented sensitivity coejjicients signifi- cantly different to those determined in vitro: a 2 point calibration procedure was found necessary for in vivo experiments.
650 1 4 _aGLUCOSE
650 1 4 _aMICROSENSOR
650 1 4 _aNEEDLE
650 1 4 _aSUBCUTANEOUS
650 1 4 _aCELLULOSE ACE-TATE
650 1 4 _aPOLYURETHANE
650 1 4 _aGLUCOSE OXIDASE
650 1 4 _aPARABENZOQUIONE
700 1 2 _aStemberg, R.
700 1 2 _aBarrau, M-B.
700 1 2 _aGangiotti, L.
700 1 2 _aThévenot, D.R.
856 4 0 _uhttps://drive.google.com/file/d/1GfelgOp5Tnx2EfXG9LyUS0HeJjEzPlbh/view?usp=drivesdk
_zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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