Tissue Engineering Multiple Choice Questions on “Spectroscopic Biosensing Techniques”.
1. Which biosensor’s principle has been represented in following diagram?
A. Electrochemical biosensors
B. Optical biosensors
C. Electronic biosensors
D. Piezoelectric biosensors
Answer: A
Clarification: Electrochemical biosensors are ordinarily founded on enzymatic catalysis of a response that produces or expends electrons (such proteins are properly called redox catalysts). The sensor substrate more often than not contains three cathodes; a reference terminal, a working anode and a counter anode.
2. Impedance spectroscopy measures the resistance and capacitance properties of material via application of a ______________ air conditioning excitation signal of c. 2–10 mV.
A. sinusoal
B. linear
C. exponential
D. declining
Answer: A
Clarification: Electrochemical impedance spectroscopy. Impedance spectroscopy estimates the opposition and capacitance properties of material by means of use of a sinusoal air conditioning excitation sign of c. 2–10 mV. An impedance range is gotten by differing recurrence over a characterized range.
3. _________ spectroscopy is based on the interaction of an external field with the electric dipole moment of the sample, often expressed by the permittivity.
A. Dielectric
B. Capacitor
C. Transducer
D. Electrochemical
Answer: A
Clarification: Dielectric spectroscopy estimates the dielectric properties of a medium as a component of recurrence. It depends on the cooperation of an outse field with the electric dipole snapshot of the example, regularly communicated by the permittivity. It is additionally a trial technique for portraying electrochemical frameworks.
4. Atomic polarization is observed when the nucleus of the atom reorients in response to the electric field.
A. TRUE
B. FALSE
Answer: A
Clarification: Atomic polarization is seen when the core of the iota reorients because of the electric field. This is a resounding procedure. Nuclear polarization is characteristic for the ea of the iota and is an outcome of a connected field. Electronic polarization alludes to the electron thickness and is a result of a connected field. Nuclear polarization is normally little contrasted with electronic polarization.
5. ______________ relaxation as a whole is the result of the movement of dipoles (dipole relaxation) and electric charges (ionic relaxation) due to an applied alternating field.
A. Dielectric
B. Capacitor
C. Transducer
D. Electrochemical
Answer: A
Clarification: Dielectric relaxation, in general, is the consequence of the development of dipoles (dipole unwinding) and electric charges (ionic unwinding) because of a connected substituting field and is normally seen in the recurrence run 102-1010 Hz. Unwinding components are moderately moderate contrasted with full electronic changes or atomic vibrations, which more often than not have frequencies over 1012 Hz.
6. Atomic polarization is observed when the nucleus of the atom reorients in response to the electric field.
A. TRUE
B. FALSE
Answer: A
Clarification: Atomic polarization is seen when the core of the particle reorients because of the electric field. This is a resounding procedure. Nuclear polarization is characteristic for the ea of the molecule and is an outcome of a connected field. Electronic polarization alludes to the electron thickness and is an outcome of a connected field. Atomic polarization is typically little contrasted with electronic polarization.
7. Debye relaxation is the dielectric relaxation response of an eal, noninteracting population of dipoles to an alternating external electric field.
A. TRUE
B. FALSE