相关实验视频

Updated: Jan 17, 2026

Preparation of Fungal and Plant Materials for Structural Elucidation Using Dynamic Nuclear Polarization Solid-State NMR
09:37

Preparation of Fungal and Plant Materials for Structural Elucidation Using Dynamic Nuclear Polarization Solid-State NMR

Published on: February 12, 2019

7.9K

通过低场NMR光谱学进行玉米粉凝化的特征

Li Ding1, Samira Ebrahimi2, Xingxun Liu3

  • 1Copenhagen Plant Science Center, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Denmark.

Carbohydrate polymers
|September 19, 2025
PubMed
概括

低场NMR揭示了水在粉膨胀和凝化过程中如何移动. 粉的膨胀涉及水进入颗粒,而凝化会从颗粒中释放水.

关键词:
对于LF-NMR来说,这是一个很大的问题.含有粉糖的含量凝化是一种凝化过程.粉与水的相互作用水上流动性的水流动性.

更多相关视频

Author Spotlight: Unveiling the Structural and Dynamic Aspects of Glycan Molecular Recognition07:40

Author Spotlight: Unveiling the Structural and Dynamic Aspects of Glycan Molecular Recognition

Published on: May 17, 2024

1.9K
Molecular Entanglement and Electrospinnability of Biopolymers07:59

Molecular Entanglement and Electrospinnability of Biopolymers

Published on: September 3, 2014

15.1K

相关概念视频

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR

The axial and equatorial protons in cyclohexane can be distinguished by performing a variable-temperature NMR experiment. In this process, except for one proton, the remaining eleven protons are replaced by deuterium. The deuterium substitution avoids the possible peak splitting caused by the spin-spin coupling between the adjacent protons. The remaining proton flips between the axial and equatorial positions.
1.7K
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.3K