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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
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Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
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Updated: May 9, 2025

Controlled Odor Mimic Permeation Systems for Olfactory Training and Field Testing
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使用图形生成模型和预测气味来导航香味空间.

Mrityunjay Sharma1,2,3, Sarabeshwar Balaji4, Pinaki Saha5

  • 1CSIR - Central Scientific Instruments Organisation, Sector 30-C, Chandigarh 160030, India.

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概括

这项研究引入了生成模型,用于创建具有可预测气味特征的新型分子,在气味预测和标签方面实现高精度. 该研究旨在通过提供可访问的工具和模型来加速香味发现和嗅觉研究.

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科学领域:

  • 计算化学是一种计算化学.
  • 机器学习是机器学习.
  • 化学信息学 化学信息学

背景情况:

  • 传统的气味探测方法是有限的.
  • 生成模型为化学空间导航提供了一种新的方法.

研究的目的:

  • 开发和应用生成模型,以有效预测气味和生成分子.
  • 为了将分子特征与气味的相似性相关联,并确保模型的解释性.

主要方法:

  • 利用生成建模来进行分子合成.
  • 实现机器学习用于气味预测 (ROC AUC 0.97) 和标签.
  • 使用SHAP来解释气味相似性与物理化学性质的相关性.

主要成果:

  • 成功生成了具有预测气味特征的分子.
  • 在气味相似性预测方面取得了高准确性 (ROC AUC 0.97).
  • 建立了分子特征和气味特征之间的相关性.

结论:

  • 生成模型为探索化学空间和预测气味提供了一个有效的框架.
  • 开发的方法和开放的资源可以促进香味发现和嗅觉研究.