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関連する概念動画

Electron Behavior00:54

Electron Behavior

Electrons are negatively charged subatomic particles that are attracted to an orbit around the positively-charged nucleus of an atom. They reside in locations that are associated with energy levels called shells and are further organized into sub-shells and orbitals within each shell.Electrons Orbit the NucleusElectrons are found in specific locations outside of the nucleus. The shell in which an electron resides indicates the general energy level of the electron: those closer to the nucleus...
Resting Membrane Potential01:24

Resting Membrane Potential

The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
Induced Electric Dipoles01:28

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...

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関連する実験動画

Updated: Jul 8, 2026

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
12:20

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Published on: July 22, 2013

電子ドナー溶媒効果は,量子ドットによるバイオセンシングを提供します.

Baikuntha P Aryal1, David E Benson

  • 1Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.

Journal of the American Chemical Society
|December 15, 2006
PubMed
まとめ
この要約は機械生成です。

新しいパルミタートバイオセンサは,半導体ナノ粒子と電子転送を使用して,パルミタート濃度を検出します. この方法は,様々な小分子のための光成像反応剤を開発するための新しいアプローチを提供します.

さらに関連する動画

Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology
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Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology

Published on: March 31, 2022

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles
04:53

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles

Published on: May 26, 2023

関連する実験動画

Last Updated: Jul 8, 2026

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions
12:20

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Published on: July 22, 2013

Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology
09:39

Exploring Biomolecular Interaction Between the Molecular Chaperone Hsp90 and Its Client Protein Kinase Cdc37 using Field-Effect Biosensing Technology

Published on: March 31, 2022

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles
04:53

Electric Cell-Substrate Sensing for Real-Time Evaluation of Metal-Organic Framework Toxicological Profiles

Published on: May 26, 2023

科学分野:

  • バイオケミストリー バイオケミストリー
  • ナノテクノロジー ナノテクノロジー
  • アナリティカル・ケミストリー (Analytical Chemistry) とは

背景:

  • バイオセンサは,小さな分子を検出する上で極めて重要です.
  • 半導体ナノ粒子は,センシングアプリケーションにユニークな光学特性を提供します.
  • 腸脂肪酸結合タンパク質 (IFABP) は,脂肪酸の輸送に役割を果たしています.

研究 の 目的:

  • 敏感なパルミタート検出のための新しいバイオセンサを開発する.
  • パルミタート濃度を報告するために,半導体ナノ粒子の光を利用する.
  • バイオセンサ特性の調節におけるIFABPの利用を調査する.

主な方法:

  • ZnSコーティングされたCdSeナノ粒子を用いてバイオセンサを構築しました.
  • ナノ粒子に,ルテニウム複合体改変型IFABPを共振的に結合した.
  • パルミテートを検出するために,ナノ粒子放出の電子移転 quenching を利用しました.
  • パルミタートを追加した際の光強度の変化を測定した.

主要な成果:

  • 500 nMのナトリウムパルミテートで,放射強度の1.6倍の変化が観察されました.
  • パルミタートには5 nMの解離定数が決定されました.
  • 1 nMの検出下限を確立しました.
  • パルミタート結合がポケット溶解を変化させるが,全体的なタンパク質構成は変化しないことが示された.

結論:

  • 半導体ナノ粒子に基づく新種のバイオセンサを開発しました.
  • バイオセンサは高感度で,パルミタートの検出限界が低い.
  • この戦略は,何千もの他の小分子分析剤を検出するために拡張できます.
  • バイオセンサは,光コントラストイメージング用反応剤として機能します.