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関連する概念動画

Ions as Acids and Bases02:54

Ions as Acids and Bases

26.8K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.8K
Lewis Acids and Bases02:33

Lewis Acids and Bases

48.5K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.5K
Acids, Bases and Neutralization Reactions03:26

Acids, Bases and Neutralization Reactions

64.0K
An acid-base reaction is one in which a hydrogen ion, H+, is transferred from one chemical species to another. Such reactions are of central importance to numerous natural and technological processes, ranging from the chemical transformations within cells or lakes and oceans to the industrial-scale production of fertilizers, pharmaceuticals, and other substances essential to the society.
64.0K
Bronsted-Lowry Acids and Bases02:58

Bronsted-Lowry Acids and Bases

106.2K
The acid-base reaction class has been studied for quite some time. In 1680, Robert Boyle reported traits of acid solutions that included their ability to dissolve many substances, to change the colors of certain natural dyes, and to lose these traits after coming in contact with alkali (base) solutions. In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance (now known to be CO2), and interact with alkalis to form neutral...
106.2K
Acid-Base Titration Curves02:23

Acid-Base Titration Curves

141.9K
A titration curve is a plot of some solution property versus the amount of added titrant. For acid-base titrations, solution pH is a useful property to monitor because it varies predictably with the solution composition and, therefore, may be used to monitor the titration’s progress and detect its endpoint. Acid-base titration can be performed with a strong acid and a strong base, a strong acid and a weak base, or a strong base and a weak acid.
For a titration carried out for 25.00 mL of...
141.9K
Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

36.2K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
36.2K

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関連する実験動画

Updated: Feb 15, 2026

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
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Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

Published on: June 3, 2018

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アフラトキシンB1の検出のために,ゴールドスクリーンプリントされた電極を使用した,3-メルカプトプロピオニック酸エージェントベースのバイオセンサシステム.

Burçak Demi̇rbakan1, Ahmet Çeti̇nkaya2, Evrim Güneş Altuntaş3

  • 1Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Türkiye.

Journal of pharmaceutical and biomedical analysis
|February 13, 2026
PubMed
まとめ

新しい電気化学バイオセンサは,食品中のアフラトキシンB1 (AFB1) の超感度検出を可能にします. この信頼性の高い方法は,高い精度と選択性で食品安全モニタリングを強化します.

キーワード:
3-メルカプトプロピオニック酸 (3-MPA)アフラトキシンB1 (AFB-1) とはゴールドスクリーンプリント電極 (SPE-Au)

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Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
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Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
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関連する実験動画

Last Updated: Feb 15, 2026

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen
17:16

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

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Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
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Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
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Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules

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科学分野:

  • 電気化学 電気化学について
  • バイオセンサ技術について
  • 食品安全分析 食品安全分析について

背景:

  • アフラトキシンB1 (AFB1) は,食品の安全性および人間の健康に重大な脅威をもたらす.
  • 様々な食品マトリックスにおけるAFB1の正確で敏感な検出方法は極めて重要です.
  • 既存の検出方法は,日常的なモニタリングに必要な感度,速度,または費用対効果が欠けている可能性があります.

研究 の 目的:

  • AFB1.1.の超敏感検出のための新しい電気化学バイオセンサを開発し,検証する.
  • バイオセンサプラットフォームの最適化により,分析性能と信頼性が向上します.
  • バイオセンサの実世界の食品安全モニタリングにおける適用性を評価する.

主な方法:

  • 金色のスクリーンプリント電極 (SPE-Au) に,3-マーカプトプロピオニン酸 (3-MPA) 改変された自己組み立てモノレイヤー (SAM) を使用したバイオセンサの構築.
  • 機能化された電極表面に抗-AFB1抗体の共性不動化.
  • サイクルボルトメトリー (CV) と電気化学阻抗スペクトロスコーピー (EIS) を用いた電気化学的特徴化.
  • 3-MPA濃度の最適化により,分析性能が向上する.

主要な成果:

  • 開発されたバイオセンサは,AFB1の0.1から250pg/mLまでの幅広い線形検出範囲を達成しました.
  • 超敏感検出は,検出限界値 (LOD) 0.94 pg/mLと定量化限界値 (LOQ) 3.14 pg/mLで実証されました.
  • バイオセンサは,高い再現性,AFB1に対する優れた選択性,および実際の食品サンプル (牛乳,米,ピーナッツ,チリペッパー) の分析に成功した応用を示した.

結論:

  • この新しい電気化学バイオセンサは,さまざまな食品のAFB1検出に高度に敏感で信頼性の高いプラットフォームを提供します.
  • 最適化されたバイオセンサの設計と性能は,食品安全監視における実用的な応用の可能性を強く示しています.
  • この技術は,食品サプライチェーンの安全性を確保することにより,公衆衛生の保護に貢献することができます.