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Related Concept Videos

Size-Exclusion Chromatography01:08

Size-Exclusion Chromatography

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In size-exclusion chromatography (SEC), also known as molecular-exclusion or gel-permeation chromatography, molecules are separated based on their sizes. This technique is important for separating large molecules such as polymers and biomolecules. The two classes of micron-sized stationary phases encountered in SEC are silica particles and cross-linked polymer resin beads. Both materials are porous, but their pore sizes vary significantly.
Silica particles offer advantages such as rigidity,...
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A Simple Method for High Throughput Chemical Screening in Caenorhabditis Elegans
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Dispensing Small Scale Solids Using Chemical-Coated Beads for Solid Form Screening.

Jiantao Meng1,2, Chengang Henry Zhou1, Lei Yin1

  • 1China Innovation Center of Roche, 371 Lishizhen Road, Shanghai 201203, China.

Molecular Pharmaceutics
|October 30, 2025
PubMed
Summary
This summary is machine-generated.

ChemBeads, a coated-bead method, precisely dispenses small molecules for drug screening. This automation-compatible technique ensures reliable solid form outcomes for beyond-the-Rule-of-5 drug candidates.

Keywords:
ChemBeadslab automationmulticomponent crystalsolid dispensingsolid form screening

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Area of Science:

  • Pharmaceutical Sciences
  • Materials Science
  • Chemical Engineering

Background:

  • Accurate dispensing of small-molecule counterions and coformers is challenging in solid form screening.
  • Beyond-the-Rule-of-5 (bRo5) drug candidates present unique dispensing difficulties.
  • Current methods lack scalability and automation compatibility for high-throughput screening.

Purpose of the Study:

  • To present and evaluate the broad applicability of ChemBeads, a coated-bead approach, for small-scale solid addition.
  • To demonstrate the precision, automation compatibility, and reliability of ChemBeads in solid form screening.
  • To assess the impact of ChemBeads on crystallization kinetics and solid form outcomes.

Main Methods:

  • Systematic evaluation of ChemBeads using multiple model systems.
  • Assessment of small-scale solid addition precision and automation capabilities.
  • Analysis of ChemBeads' impact on flowability, stability, surface uniformity, and crystallization kinetics.

Main Results:

  • ChemBeads enable precise and automated small-scale solid addition for diverse molecules.
  • The coated-bead approach maintains flowability, stability, and uniform surface coatings.
  • Introduction of glass beads does not alter solid form outcomes, ensuring experimental reliability.
  • ChemBeads show no adverse effects on crystallization kinetics.

Conclusions:

  • ChemBeads offer a broadly applicable solution for accurate small-molecule dispensing in solid form screening.
  • The coated-bead method is scalable and automation-compatible, suitable for high-throughput pharmaceutical development.
  • ChemBeads provide a reliable and efficient approach for screening beyond-the-Rule-of-5 drug candidates.