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Molecules and Compounds02:38

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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond. Elements are classified as atomic or molecular based on the nature of their basic units.
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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.
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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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Basics of Compounding: Compounding Microemulsions.

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Microemulsions improve drug delivery by enhancing solubility, permeability, and stability. These thermodynamically stable systems are key in developing advanced pharmaceutical formulations.

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Area of Science:

  • Pharmaceutical Sciences
  • Colloid and Surface Chemistry

Background:

  • Microemulsions are thermodynamically stable, isotropic liquid systems.
  • They consist of oil, water, surfactant, and cosurfactant.
  • Microemulsions can be oil-in-water or water-in-oil systems.

Purpose of the Study:

  • To highlight the utility of microemulsions in pharmaceutical compounding.
  • To discuss their role in enhancing drug properties.
  • To explore their application in novel drug delivery systems.

Main Methods:

  • Characterization of microemulsion systems.
  • Evaluation of solubility, permeability, and bioavailability enhancement.
  • Assessment of chemical and physical stability.

Main Results:

  • Microemulsions significantly increase solubility, permeability, and bioavailability of certain drug substances.
  • These systems offer enhanced chemical and physical stability.
  • The type of microemulsion depends on oil and surfactant properties.

Conclusions:

  • Microemulsions represent a valuable approach for pharmaceutical compounding.
  • They are integral to the design and development of new drug delivery systems.
  • Their application spans both commercial manufacture and specialized compounding.