Podcast
Questions and Answers
What is the definition of rheology?
What is the definition of rheology?
- The study of flow of liquids and deformation of matter (correct)
- The study of flow of gases and deformation of matter
- The study of fluid dynamics and heat transfer
- The study of flow of solids and deformation of matter
What phenomenon leads to the increase in viscosity by forming hydroclusters?
What phenomenon leads to the increase in viscosity by forming hydroclusters?
- Thixotropy
- Shear thinning
- Hydroclustering (correct)
- Hysteresis loop
How is viscosity generally measured in rheological studies?
How is viscosity generally measured in rheological studies?
- Temperature gradient analysis
- Density measurement
- Resistance to flow (correct)
- Shear rate proportional to shear stress
How is thixotropy defined in terms of the conversion of sol to gel?
How is thixotropy defined in terms of the conversion of sol to gel?
What does the hysteresis loop represent in thixotropy?
What does the hysteresis loop represent in thixotropy?
Which type of deformation is reversible in a pharmaceutical system?
Which type of deformation is reversible in a pharmaceutical system?
Which process involves a slow conversion from solution-fluid to semisolid gel by applying shear stress?
Which process involves a slow conversion from solution-fluid to semisolid gel by applying shear stress?
What is the viscosity unit commonly used, as described in the text?
What is the viscosity unit commonly used, as described in the text?
What type of flow is exhibited by polymer dispersions like Tragacanth water and Sodium alginate in water?
What type of flow is exhibited by polymer dispersions like Tragacanth water and Sodium alginate in water?
In what type of flow does the resistance to flow (viscosity) increase with an increase in shear rate?
In what type of flow does the resistance to flow (viscosity) increase with an increase in shear rate?
What does N equal to if a material exhibits Newtonian behavior?
What does N equal to if a material exhibits Newtonian behavior?
What property characterizes Dilatant Flow?
What property characterizes Dilatant Flow?
What is the formula to calculate the instrumental constant in the context of viscoelasticity?
What is the formula to calculate the instrumental constant in the context of viscoelasticity?
Which type of materials exhibit both the viscous properties of liquid and the elastic property of solids, as mentioned in the text?
Which type of materials exhibit both the viscous properties of liquid and the elastic property of solids, as mentioned in the text?
In the context of pharmaceutical products, what does rheology mainly study in terms of creams and ointments?
In the context of pharmaceutical products, what does rheology mainly study in terms of creams and ointments?
Why is studying rheological properties important in pharmaceutical products, according to the text?
Why is studying rheological properties important in pharmaceutical products, according to the text?
Which type of viscometers are suitable for both Newtonian and non-Newtonian systems?
Which type of viscometers are suitable for both Newtonian and non-Newtonian systems?
In the falling sphere viscometer formula η = t (Sb – Sf) B, what does B represent?
In the falling sphere viscometer formula η = t (Sb – Sf) B, what does B represent?
What is the formula provided for determining viscosity in Newtonian liquids using rotational viscometers?
What is the formula provided for determining viscosity in Newtonian liquids using rotational viscometers?
Why are multi-point instruments preferred over single-point instruments in non-Newtonian systems?
Why are multi-point instruments preferred over single-point instruments in non-Newtonian systems?
