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Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
Chemistry of Carbohydrates03:25

Chemistry of Carbohydrates

Carbohydrates are an essential part of the diet in humans and animals. Grains, fruits, and vegetables are natural sources of carbohydrates that provide energy to the body, particularly through glucose, a simple sugar that is a component of starch and an ingredient in many staple foods. The stoichiometric formula (CH2O)n, where n is the number of carbons in the molecule represents carbohydrates. In other words, the ratio of carbon to hydrogen to oxygen is 1:2:1 in carbohydrate molecules. This...
Chemical Shift: Internal References and Solvent Effects01:17

Chemical Shift: Internal References and Solvent Effects

In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
Solubility Equilibria03:07

Solubility Equilibria

Solubility equilibria are established when the dissolution and precipitation of a solute species occur at equal rates. These equilibria underlie many natural and technological processes, ranging from tooth decay to water purification. An understanding of the factors affecting compound solubility is, therefore, essential to the effective management of these processes. This section applies previously introduced equilibrium concepts and tools to systems involving dissolution and precipitation.
The...
Solubility Equilibria: Overview01:09

Solubility Equilibria: Overview

When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...

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Related Experiment Video

Updated: Jul 6, 2026

Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
09:42

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Optimized parameters for continuum solvation calculations with carbohydrates.

David F Green1

  • 1Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794-3600, USA. david.green@stonybrook.edu

The Journal of Physical Chemistry. B
|April 5, 2008
PubMed
Summary

Optimized atomic parameters for continuum solvation models improve the accuracy of carbohydrate energetics calculations. These new parameters, derived from explicit solvent simulations, enable reliable predictions for carbohydrate-containing systems.

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Area of Science:

  • Computational Chemistry
  • Biomolecular Modeling
  • Physical Chemistry

Background:

  • Continuum solvent models offer efficient biomolecular energetics calculations.
  • Accurate atomic radii/volumes are crucial for these models.
  • Carbohydrates currently lack optimized parameters for these calculations.

Purpose of the Study:

  • To develop and present optimized atomic parameters for continuum solvation calculations of carbohydrates.
  • To integrate these parameters with the Carbohydrate Solution Force Field.
  • To enhance the accuracy of implicit solvent models for carbohydrate systems.

Main Methods:

  • Performed explicit solvent free-energy perturbation simulations on hexapyranose sugars.
  • Fitted atomic radii for Poisson-Boltzmann and generalized-Born models.
  • Fitted atomic volumes for the analytical continuum electrostatics model.

Main Results:

  • Poisson-Boltzmann model with optimized radii achieved remarkable agreement with explicit solvent simulations (1.19 kcal/mol RMSE).
  • Generalized-Born model showed strong correlation with an error of 1.69 kcal/mol.
  • Analytical continuum electrostatics model showed good correlation but higher error (4.71 kcal/mol).

Conclusions:

  • Optimized parameters significantly improve continuum solvent model accuracy for carbohydrates.
  • Implicit solvent models, with appropriate parameters, are highly effective for simulating carbohydrate systems.
  • This work provides a foundation for more reliable computational studies of carbohydrates in solution.