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Theories of Dissolution: Diffusion Layer Model01:15

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Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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The three-compartment open model is a pharmacokinetic model used to describe the distribution and elimination of drugs following extravascular administration. It comprises a central compartment representing the plasma and two peripheral compartments. The highly perfused peripheral compartment represents organs and tissues with a rich blood supply, such as the liver, kidneys, and lungs. The scarcely perfused peripheral compartment represents tissues with lower blood supply, such as adipose...
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Scientists frequently use models to help them comprehend a specific collection of phenomena. In physics, a model is a condensed version of a physical system that is too complex to study thoroughly. One such example is the light wave model; unlike water waves, light waves are typically invisible to us. Nonetheless, it is helpful to think of light as being composed of waves, since investigations show that light behaves like water waves. Since it is impossible to visually see what is genuinely...
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Related Experiment Video

Updated: Nov 26, 2025

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Rethinking interdisciplinarity: Proposing a multilayered model.

Shahram Yazdani1, Maryam Hajiahmadi1, Sareh Shakerian2

  • 1Virtual School of Medical Education and Management, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Medical Journal of the Islamic Republic of Iran
|December 14, 2020
PubMed
Summary

This study proposes a new theoretical model to overcome challenges in interdisciplinary research by breaking down artificial disciplinary boundaries. The multilayered model facilitates the integration of knowledge for solving complex real-world problems.

Keywords:
Critical reviewDisciplinarityInterdisciplinarityModelTheoretical model

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Area of Science:

  • Interdisciplinary Studies
  • Knowledge Integration
  • Scientific Collaboration

Background:

  • Interdisciplinary approaches are crucial for complex problem-solving but face challenges due to disciplinary contradictions and lack of theoretical models.
  • Integrating diverse disciplines requires a framework to understand and guide the process of crossing disciplinary boundaries.
  • Existing research highlights the need for a robust theoretical model to support effective interdisciplinary activities.

Purpose of the Study:

  • To propose a novel theoretical model for interdisciplinary development.
  • To demonstrate how a multilayered model can be constructed based on scientific disciplinary boundaries.
  • To provide a framework for understanding and facilitating interdisciplinary integration.

Main Methods:

  • A critical review strategy (Carnwell and Daly) was employed to synthesize the theoretical model.
  • The methodology involved five stages: defining review scope, identifying information sources, literature review, writing the review, and applying findings.
  • Online databases were utilized for comprehensive literature searching and synthesis.

Main Results:

  • The study identified 13 levels of disciplinary boundaries that need to be addressed for effective interdisciplinarity.
  • A multilayered theoretical model for interdisciplinary development was proposed, synthesizing expert and researcher opinions.
  • Breaking down artificial disciplinary boundaries is essential for successful interdisciplinary endeavors.

Conclusions:

  • The proposed model offers effective support for interdisciplinary programs.
  • This theoretical framework can help bridge the gap between interdisciplinary program goals and practical application.
  • The model facilitates a more integrated and effective approach to tackling complex, real-world challenges through interdisciplinary collaboration.