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関連する概念動画

Chirality in Nature02:30

Chirality in Nature

13.8K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.8K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

5.9K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.9K
Prochirality02:05

Prochirality

3.9K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.9K
Molecules with Multiple Chiral Centers02:25

Molecules with Multiple Chiral Centers

12.1K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
12.1K
Stereoisomerism of Cyclic Compounds02:33

Stereoisomerism of Cyclic Compounds

9.2K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
9.2K
Chirality02:25

Chirality

25.2K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.2K

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関連する実験動画

Updated: Sep 10, 2025

A Micropatterning Assay for Measuring Cell Chirality
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一次元的な統計を調整することによって,キラリで保護された国家操作

F Theel1, M Bonkhoff2, P Schmelcher1,3

  • 1University of Hamburg, Center for Optical Quantum Technologies, Department of Physics, Luruper Chaussee 149, 22761 Hamburg, Germany.

Physical review letters
|August 27, 2025
PubMed
まとめ

アニオン・ハバードモデルのキラル対称性は 独特のゼロエネルギー状態を保護します アディアバティック進化はベリー・フェーズとチェッカーボードのパターンを明らかにし,新しい制御方法を提供しています.

さらに関連する動画

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
10:28

Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy

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関連する実験動画

Last Updated: Sep 10, 2025

A Micropatterning Assay for Measuring Cell Chirality
08:07

A Micropatterning Assay for Measuring Cell Chirality

Published on: March 11, 2022

2.4K
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
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科学分野:

  • 凝縮物質物理学
  • 量子力学
  • 統計的メカニズム

背景:

  • 典型的な格子モデルでは 奇拉的対称性を破ります
  • アニオン・ハバードモデルは例外で 統計的な相互作用が特徴です
  • このモデルではキラル対称性が 退廃したゼロエネルギーサブスペースを保護します

研究 の 目的:

  • アニオン・ハバード・モデルの ゼロエネルギー状態の性質を 探求するためです
  • 統計的パラメータのアディアバティックな進化を調査する.
  • この独特の量子状態を 準備し制御するプロトコルの デモンストレーションです

主な方法:

  • 統計パラメータのアディアバティックな進化
  • ベリー相とホロノミーの分析
  • N粒子の密度とチェッカーボードのパターンの観察と検証

主要な成果:

  • ノントリヴィアルなベリー・フェーズとホロノミーは,キラル・サブスペースで発見されました.
  • N粒子の密度における静止チェッカーボードパターンが観察された.
  • これらのパターンはアディアバティック操作で保存されます.

結論:

  • チラルの対称性は,アニオン・ハバードモデルにおけるゼロエネルギー状態に対して強力な保護を提供する.
  • アディアバティック操作は,アニオン編み物に補完的なアプローチを提供します.
  • これらの状態を準備し,観察し,制御するための明示的なプロトコルが提示されます.