Change of conductivity being
normal state and gas detecting in sno2 grain boundary
Amount of desorption and absorption of oxide and free electron
can control sensor sensitivity
Electrode and the electrolyte solution while maintaining a constant current from the direct oxidation and reduction when measuring current to detect the gas.
Cause ionization of the electrolyte solution, the
detectors, such as the quartz crystal microbalance (QCM).[5] In first approximation cantilevers behave like a harmonic oscillator, and the mass change on a rectangular cantilever will produce a reduction on the resonance frequency, which can be estimated from:
where f0 and f1 are the fundamental resonance frequency before and after the mass adding, respectively.
Recent studies have demonstr
detecting method using cardiac marker
The principle of detecting method is simple. when the heart muscles are damaged by some reasons, the cardiac enzymes existing in heart muscles are emitted in blood vessels. by detecting the change of the concentration of cardiac enzymes, we can diagnose the heart disease.
detecting method>
2. Problem of the PBL
2.1 i
detecting of hemoglobin
Criminalists mix the luminol (C8H7O3N3) powder with a liquid containing hydrogen peroxide
(H2O2), a hydroxide (OH-) and other chemicals, and pour the liquid into a spray bottle. The
hydrogen peroxide and the luminol are actually the principal players in the chemical reaction,
but in order to produce a strong glow, they need a catalys