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Updated: May 10, 2026

Stretching Short Sequences of DNA with Constant Force Axial Optical Tweezers
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Stretching Short Sequences of DNA with Constant Force Axial Optical Tweezers

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マジック波長の光学ピンチで分子の長寿命の絡み合い

Daniel K Ruttley1,2, Tom R Hepworth1,2, Alexander Guttridge1,2

  • 1Department of Physics, Durham University, Durham, United Kingdom.

Nature
|January 15, 2025
PubMed
まとめ

研究者は超冷たい極性分子同士の 長期間の量子絡み合いを実現しました 制御された光学ピンチを用いた この画期的な発見は 量子技術と基礎科学の研究に 新たな道を開きます

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¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.