NURSING EXAM QUESTIONS
PHARMACEUTICS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Thixotropy is a time-dependent shear thinning property. Certain gels or fluids that are thick or viscous under static conditions will flow (become thinner, less viscous) over time when shaken, agitated, shear-stressed, or otherwise stressed (time-dependent viscosity).
Detailed explanation-2: -What is the characteristic variation shown by the thixotropic fluids in their shear stress vs. rate of shear strain graph? Explanation: Thixotropic fluid show a Non-Newtonian variation for shear stress vs. rate of shear strain graph after a characteristic limiting value of shear stress is reached.
Detailed explanation-3: -It is important to note the distinction between a thixotropic fluid and a shear thinning fluid. The former displays a decrease in viscosity over time at a constant shear rate, while the latter displays decreasing viscosity with increasing shear rate.