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Questions and Answers

What factor is significantly influenced by the degree of crystallinity in drug delivery systems using CSNPs?

  • Rate of drug absorption
  • Particle size distribution
  • Chemical properties of the polymer
  • Hydrophilicity and hydrophobicity balance (correct)

Which of the following strategies increases the adsorption capacity of CSNPs?

  • Decreasing the molecular weight
  • Eliminating the sugar groups
  • Reducing the number of amine groups
  • Increasing the content of amine groups (correct)

How does surface roughness of nanoparticles affect their interaction with blood proteins?

  • It decreases the binding efficiency.
  • It increases concentration and interaction with proteins. (correct)
  • It has no effect on protein interaction.
  • It enhances drug absorption.

What is one consequence of the cationic nature of CSNPs in drug delivery applications?

<p>Enhanced drug absorption through negative interactions. (A)</p> Signup and view all the answers

What mechanism primarily controls the drug release from CSNPs?

<p>Degradation and diffusion of the polymer. (C)</p> Signup and view all the answers

In the context of CSNPs, what effect does increasing molecular weight generally have?

<p>Increases polymolecularity and hydrophilicity. (B)</p> Signup and view all the answers

Which manufacturing method involves the cross-linking of chitosan chains for CSNP production?

<p>Ionic gelation method. (A)</p> Signup and view all the answers

What is the influence of crystallinity on drug release from polymers?

<p>Higher crystallinity results in low flexibility and slower drug diffusion. (D)</p> Signup and view all the answers

Which factor primarily determines the physicochemical properties of a polymer?

<p>Degree of crystallinity (C)</p> Signup and view all the answers

What primarily determines the breakdown of polymer structures in drug delivery systems?

<p>Ratio of hydrophobic to hydrophilic qualities. (C)</p> Signup and view all the answers

What condition describes a polymer when it is in a 'rubberlike' state?

<p>It is above the glass transition temperature. (B)</p> Signup and view all the answers

Which statement is true regarding the manufacturing methods of CSNPs?

<p>CSNPs can be created using various synthesis techniques that influence their properties. (B)</p> Signup and view all the answers

How does particle size impact the release profile of drugs from polymers?

<p>Smaller particles increase the surface area for drug release. (D)</p> Signup and view all the answers

What is a common mechanism for polymer erosion?

<p>Solvent penetration leading to swelling and degradation. (B)</p> Signup and view all the answers

Which transition is described as a β relaxation transition in polymers?

<p>When transitioning occurs between 140 and 150 degrees Celsius. (B)</p> Signup and view all the answers

What effect do nano-fillers have on the glass transition temperature of polymers?

<p>They decrease the glass transition temperature by developing free surfaces. (D)</p> Signup and view all the answers

What is the primary characteristic of bi-phasic drug release?

<p>It helps achieve rapid therapeutic levels while maintaining controlled release. (D)</p> Signup and view all the answers

How does the diameter of CSNPs affect their behavior?

<p>Smaller diameters increase surface area and decrease drug release path length. (B)</p> Signup and view all the answers

Which mechanism is NOT typically involved in drug release from polymer matrices?

<p>Crosslinking of drug molecules (D)</p> Signup and view all the answers

What factor influences the selection of a manufacturing method for CSNPs?

<p>The required particle size and stability (D)</p> Signup and view all the answers

In which method is crosslinking primarily achieved by hydrogen bonding?

<p>Ionic gelation method (B)</p> Signup and view all the answers

What impact does the modification of CSNPs have on drug release rates?

<p>It can lead to faster release rates compared to unconjugated CSNPs. (B)</p> Signup and view all the answers

Which of the following mathematical models is NOT used for kinetic analysis of drug release?

<p>Logarithmic decay model (B)</p> Signup and view all the answers

What is the primary effect of pH on drug release from CSNPs?

<p>It affects the solubility of the drug. (A)</p> Signup and view all the answers

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