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関連する概念動画

Steady State Concentration01:05

Steady State Concentration

4.9K
A steady state refers to the level of a drug in the body once it has reached an equilibrium between administration and elimination. It represents the point at which the drug administration rate equals the drug elimination rate, resulting in a relatively constant concentration in the body over time. The dynamic equilibrium is crucial to ensure the drug's effectiveness with minimal risk of toxicity.
Most drugs are administered in repeated doses at fixed intervals or through continuous...
4.9K
Ion Exchange01:17

Ion Exchange

657
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
657
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

527
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
527
The Equilibrium Constant03:10

The Equilibrium Constant

49.2K
Consider the oxidation of sulfur dioxide:
49.2K
Non-equilibrium in the Cell01:16

Non-equilibrium in the Cell

4.8K
An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
4.8K
Solution Equilibrium and Saturation01:59

Solution Equilibrium and Saturation

19.4K
Imagine adding a small amount of sugar to a glass of water, stirring until all the sugar has dissolved, and then adding a bit more. You can repeat this process until the sugar concentration of the solution reaches its natural limit, a limit determined primarily by the relative strengths of the solute-solute, solute-solvent, and solvent-solvent attractive forces. You can be certain that you have reached this limit because, no matter how long you stir the solution, undissolved sugar remains. The...
19.4K

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関連する実験動画

Updated: Sep 9, 2025

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
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Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes

Published on: November 12, 2016

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純正の安定状態 CEST

Johannes Hammacher1, Christoph Kolbitsch1, Patrick Schünke1

  • 1Physikalisch-Technische Bundesanstalt (PTB), Berlin and Braunschweig, Abbestrasse 12, Berlin, 10587, Berlin, Germany.

Magnetic resonance imaging
|September 3, 2025
PubMed
まとめ
この要約は機械生成です。

新しい化学交換飽和移転 (CEST) 配列設計は,純粋なCEST安定状態でデータを取得することによって高性能を達成します. この新しいアプローチは様々な実験環境で 感度と画像の質を高めます

キーワード:
CEST についてインターリーブスパイラル安定した状態

さらに関連する動画

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
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The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

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関連する実験動画

Last Updated: Sep 9, 2025

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
11:44

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes

Published on: November 12, 2016

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The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations
10:11

The Benthic Exchange of O2, N2 and Dissolved Nutrients Using Small Core Incubations

Published on: August 3, 2016

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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

8.6K

科学分野:

  • 磁気共鳴画像検査
  • 生物医学工学

背景:

  • 化学交換飽和移転 (CEST) は機能的なMRI技術である.
  • CESTのシーケンスを最適化することは,感度と診断能力を改善するために不可欠です.
  • 既存のCESTシーケンスでは,一貫したデータ取得と高い信号対ノイズ比率を達成することが困難です.

研究 の 目的:

  • 新しい安定状態の化学交換飽和移転 (CEST) 配列を開発し,検証する.
  • 感度とCEST効果を高めるために純粋なCESTの安定状態を活用する.
  • 従来の方法と比較して画像品質とMTRasymスコアを向上させる.

主な方法:

  • 縦断磁化の物理モデルに基づいて新しい安定状態のCEST配列が設計されました.
  • シーケンス設計は,シリコン数値シミュレーションを使用して厳格にテストされました.
  • 検証は in vitro 及び in vivo 実験によって行われました.

主要な成果:

  • 開発されたMulti- 2D Spiralの純CESTシーケンスは,優れた感度と有効性を示した.
  • 純粋なCESTの安定状態で一貫したデータ取得が達成されました.
  • 高MTRasymスコアと画像品質の改善は,in vitroおよびin vivoで観察されました.

結論:

  • 純粋なCESTの安定状態でデータを取得することは,CEST MRIを強化するための有望な戦略です.
  • 新しい配列設計は,診断アプリケーションの改善のための重要な可能性を示しています.
  • この技術の能力を完全に探求するために,さらなる in vitro および in vivo 試験が必要である.