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CNS Stimulants: Cocaine, Amphetamines and Cannabinoids01:24

CNS Stimulants: Cocaine, Amphetamines and Cannabinoids

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CNS stimulants, such as cocaine, amphetamines, and cannabinoids, have varying structures and mechanisms of action that lead to different therapeutic effects and side effects. Cocaine, with its molecular formula C17H21NO4, is a tropane alkaloid and a tertiary amino compound. It has two chemical forms: the hydrochloride salt and the "freebase." The former is in powder form, while the latter involves removing the hydrochloride salt to create a form that can be smoked. Cocaine exerts its...
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Labeling DNA Probes03:31

Labeling DNA Probes

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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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Lewis Acids and Bases02:33

Lewis Acids and Bases

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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...
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Weak Base Solutions03:21

Weak Base Solutions

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Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Base Excision Repair01:54

Base Excision Repair

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One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
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Ions as Acids and Bases02:54

Ions as Acids and Bases

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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:
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An Aptamer-based Sensor for Unchelated GadoliniumIII
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アプタマーベースのコロリメトリック探査機で,コカインを検出する.

Milan N Stojanovic1, Donald W Landry

  • 1Division of Clinical Pharmacology and Experimental Therapeutics, Department of Medicine, Columbia University, Box 84, 630 West 168th Street, New York, New York 10032, USA. mns18@columbia.edu

Journal of the American Chemical Society
|August 15, 2002
PubMed
まとめ
この要約は機械生成です。

抗コカインアパタマーと染料を用いた新しい色測定センサーが,コカインを検出する. センサーは染料の移位によって動作し,溶液中のコカインを視覚的に検出することができます.

さらに関連する動画

Design and Development of Aptamer&#8211;Gold Nanoparticle Based Colorimetric Assays for In-the-field Applications
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Design and Development of Aptamer–Gold Nanoparticle Based Colorimetric Assays for In-the-field Applications

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A Method for Selecting Structure-switching Aptamers Applied to a Colorimetric Gold Nanoparticle Assay
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A Method for Selecting Structure-switching Aptamers Applied to a Colorimetric Gold Nanoparticle Assay

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関連する実験動画

Last Updated: Feb 14, 2026

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Design and Development of Aptamer&#8211;Gold Nanoparticle Based Colorimetric Assays for In-the-field Applications
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A Method for Selecting Structure-switching Aptamers Applied to a Colorimetric Gold Nanoparticle Assay
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A Method for Selecting Structure-switching Aptamers Applied to a Colorimetric Gold Nanoparticle Assay

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科学分野:

  • バイオケミストリー バイオケミストリー
  • アナリティカル・ケミストリー (Analytical Chemistry) とは
  • マテリアルサイエンス 材料科学

背景:

  • コカイン検出のための敏感で選択的な方法の開発は,臨床的および法医学的なアプリケーションにとって極めて重要です.
  • アプタマーは,バイオセンサの開発のためのユニークな分子認識能力を提供します.
  • カルロメトリックセンサーは,シンプルで費用対効果の高い検出プラットフォームを提供します.

研究 の 目的:

  • コカイン検出のための新しい色素測定センサーを開発し,特徴づけること.
  • アプタマー染料複合体の感知機構を調査する.
  • 関連する濃度範囲におけるセンサーの性能を評価する.

主な方法:

  • 抗コカインアプタマーとダイエチルチオトリカルボシアニン染料の間の複合体の形成.
  • コカイン結合時に760nmでの吸収量の変化を判別するスペクトロフォトメトリック分析.
  • 定性的な検出のために染料の降水と上水素の色素化の視覚的観測.

主要な成果:

  • アプタマー染料複合体は,コカインの色測定センサーとして機能する.
  • 760nmでの吸収性の低下は,コカイン濃度 (2-600μM) と相関しています.
  • 感知メカニズムは,コカインによる染料の分子間異位を伴うもので,染料の沈殿と視覚的な色変化につながります.

結論:

  • 開発されたアプタマー染料複合体は,コカインの効果的な色測定センサーとして機能します.
  • センサーは,染料の不溶性により,シンプルで視覚的な検出方法を提供します.
  • このアプローチは,コカインの迅速な検出のための有望なプラットフォームを提供します.