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Related Concept Videos

Other Glycolytic Pathways01:24

Other Glycolytic Pathways

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The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
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C4 Pathway
The C4 pathway is used by plants such as...
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Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

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Related Experiment Videos

Pathways of polymeric vesicle formation.

Giuseppe Battaglia1, Anthony J Ryan

  • 1Department of Engineering Materials, The Kroto Research Institute, The University of Sheffield, Broad Lane, Sheffield S3 7HQ, UK. g.battaglia@sheffield.ac.uk

The Journal of Physical Chemistry. B
|May 26, 2006
PubMed
Summary
This summary is machine-generated.

Polymeric vesicle formation depends on hydration kinetics. Two distinct growth regimes, subdiffusional and Fickian, were observed, with vesicle size controlled by the interface concentration gradient.

Related Experiment Videos

Area of Science:

  • Polymer science and materials chemistry
  • Soft matter physics
  • Nanotechnology

Background:

  • Polymeric vesicle formation is crucial for drug delivery and nanotechnology.
  • Understanding the hydration process of block copolymers is key to controlling vesicle morphology.
  • The interplay between diffusion and molecular arrangement governs swelling behavior.

Purpose of the Study:

  • To investigate the hydration kinetics of poly(ethylene oxide)-co-poly(butylene oxide) block copolymers.
  • To elucidate the relationship between hydration regimes and vesicle formation.
  • To explore methods for controlling vesicle size by manipulating interface concentration gradients.

Main Methods:

  • Macroscopic monitoring using confocal laser scanning microscopy.
  • Microscopic analysis via small-angle X-ray scattering.
  • Controlled hydration using an AC electric field.

Main Results:

  • Block copolymers exhibit two hydration growth regimes: subdiffusional and Fickian diffusion.
  • Hydration kinetics are dependent on polymer molecular weight and lead to distinct interfacial properties.
  • Enhancing hydration kinetics with an AC field maintains a constant interface concentration gradient, enabling control over vesicle size.

Conclusions:

  • Hydration kinetics significantly influence the phase formation and driving forces for vesicle assembly.
  • A constant interface concentration gradient, maintained by controlled hydration, is essential for overcoming the energy barrier in vesicle formation.
  • The magnitude of the interface concentration gradient directly dictates the final size of the formed vesicles.