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Related Concept Videos

The Colloidal State01:29

The Colloidal State

The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...
Colloids03:22

Colloids

Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

Factors Affecting Dissolution: Particle Size and Effective Surface Area

Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...
Drug Delivery Systems: Different Types01:27

Drug Delivery Systems: Different Types

Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...

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Related Experiment Video

Updated: Jul 18, 2026

Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release
09:11

Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release

Published on: February 13, 2016

Colloidal microgels in drug delivery applications.

Serguei V Vinogradov1

  • 1Center for Drug Delivery and Nanomedicine and Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA. vinograd@unmc.edu

Current Pharmaceutical Design
|December 16, 2006
PubMed
Summary

Environmentally responsive colloidal microgels are advanced as intelligent drug carriers. Research focuses on oral delivery, metal-containing microgels for diagnostics and therapeutics, and systemic administration for targeted drug release.

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Last Updated: Jul 18, 2026

Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release
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Alternating Magnetic Field-Responsive Hybrid Gelatin Microgels for Controlled Drug Release

Published on: February 13, 2016

Preparation of Cross-Linked Sodium Alginate Microspheres with Different Metal Ions Using the Microfluidic Electrospray Technology
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Preparation of Cross-Linked Sodium Alginate Microspheres with Different Metal Ions Using the Microfluidic Electrospray Technology

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Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications
09:39

Injectable Supramolecular Polymer-Nanoparticle Hydrogels for Cell and Drug Delivery Applications

Published on: February 7, 2021

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Colloidal microgels are responsive materials increasingly utilized as carriers for drugs and diagnostic agents.
  • Their crosslinked polymer network acts as a drug depot, offers environmental protection, and allows for modification.
  • Applications span oral drug delivery, diagnostics, therapeutics, and systemic administration.

Purpose of the Study:

  • To review recent developments in microgel formulations for oral drug delivery.
  • To explore the design of metal-containing microgels for combined diagnostic and therapeutic uses.
  • To discuss advancements in the systemic administration of microgels and novel nanogel systems.

Main Methods:

  • Review of recent literature on microgel synthesis and applications.
  • Detailed discussion of novel nanogel drug delivery systems from the authors' laboratory.
  • Analysis of nanogel synthesis, vectorization, and encapsulation of drugs and macromolecules.

Main Results:

  • Microgels show promise as versatile drug delivery systems.
  • Novel nanogels have been developed for encapsulating low molecular weight drugs and biological macromolecules.
  • Vectorization and targeted delivery strategies are being advanced.

Conclusions:

  • Recent advancements indicate significant potential for microgels in drug delivery.
  • Nanogels offer intelligent carrier capabilities, including targeted delivery and triggered release.
  • Further development is encouraged for sophisticated nanogel-based therapeutic and diagnostic platforms.