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Solvents01:12

Solvents

71.3K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
71.3K
Actin Filament Depolymerization01:19

Actin Filament Depolymerization

4.0K
Actin filaments (F-actin) are composed of actin subunits. The dissociation of actin monomers can occur from either end of F-actin. The rate of dissociation is faster from the minus-end or the pointed end, where the actin subunits exist with a bound ADP, together known as ADP-actin. The depolymerization of F-actin is aided by proteins, including the actin-depolymerizing factor (ADF) and cofilin family of proteins, gelsolin, and glia maturation factor (GMF).
In F-actin, the ADF/cofilin proteins...
4.0K
Mixtures of Acids03:27

Mixtures of Acids

21.9K
The pH of a solution containing an acid can be determined using its acid dissociation constant and its initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending upon the relative strength of the acids and their dissociation constants.
A Mixture of a Strong Acid and a Weak Acid
In a mixture of a strong acid and a weak acid, the strong acid dissociates completely and becomes a source of almost all the hydronium ions...
21.9K
Mixtures of Acids01:19

Mixtures of Acids

1.1K
The pH of a solution containing an acid can be determined using its acid dissociation constant and initial concentration. If a solution contains two different acids, then its pH can be determined using one of several methods depending on the relative strength of the acids and their dissociation constants.
In a strong and weak acid mixture, the strong acid dissociates completely and becomes a source of almost all the hydronium ions present in the solution. In contrast, the weak acid shows...
1.1K
Titration in Nonaqueous Solvents01:16

Titration in Nonaqueous Solvents

1.4K
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
1.4K
Dynamic Equilibrium02:20

Dynamic Equilibrium

63.4K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
63.4K

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Updated: Feb 12, 2026

Extraction of Lignin with High &#946;-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
10:18

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

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エチレングリコールベースの深層ユートキス溶媒混合物における効率的なリグニン溶解と酵素分解:統合実験と分子動力学の研究.

Julian Schilke1, Miriam Sprick2, Eduardo Schneider2

  • 1Institute for Biochemistry, Biotechnology and Bioinformatics, Technische Universität Braunschweig, Spielmannstraße 7, Braunschweig 38106, Germany.

The journal of physical chemistry. B
|February 11, 2026
PubMed
まとめ

グリシンバッファーと混合した深層エウテクティック溶媒 (DES) は,酵素によるデポリメリゼーションのためのリグニンの溶解性を高めます. この突破は,再生可能資源であるリグニンから芳香化学物質の効率的な生産を可能にします.

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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues
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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

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関連する実験動画

Last Updated: Feb 12, 2026

Extraction of Lignin with High &#946;-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
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Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

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科学分野:

  • バイオマス変換 バイオマス変換
  • グリーン・ケミストリー (Green Chemistry)
  • 酵素触媒による触媒.

背景:

  • リグニンはアロマティック化学物質の主要な源ですが,その低溶解性は酵素によるデポリメリゼーションを阻害します.
  • コソルベンツは,通常,効率的な処理のためにリンニンの溶解性を高めるために必要です.

研究 の 目的:

  • エチレングリコール/コリン塩化物 (EG:ChCl) ベースの深層エウテクティック溶剤 (DES) とグリシンバッファを組み合わせてリグニン溶解を調査する.
  • β-エテラゼを用いた高濃度のリグニンデポリメリゼーションのための溶媒システムを最適化するために.

主な方法:

  • リグニン溶解のためのEG:ChCl DESとグリシンバッファーの混合物を使用しました.
  • 高濃度のリグニンを含むβ-エテラゼ触媒によるデポリメリゼーションが行われました.
  • 溶剤-リグニン相互作用を分析するために分子動力学 (MD) シミュレーションを使用しました.

主要な成果:

  • 酵素活性を阻害することなく,高いリンギン濃度 (最大30g L-1) を達成します.
  • グアアシルヒドロキシプロパノンとシリンジルヒドロキシプロパノンの最大収量のための最適な条件 (20 g L-1リグニン,50% v/v EG:ChCl 4:1) を特定しました.
  • MD分析により,リンギンの溶解性におけるEGとグリシンの役割,溶解動態におけるDES比が明らかになった.

結論:

  • EG:ChCl DESとグリシンバッファシステムは,リンギンの溶解と酵素によるデポリメリゼーションに有効です.
  • 溶媒の組成は,リンニンの溶解性およびデポリメリゼーション製品の収量の両方に大きく影響します.
  • 分子相互作用の理解は,リンギン値上げ戦略の最適化に不可欠です.