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関連する概念動画

Pumped Concrete01:13

Pumped Concrete

146
Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
146
ATP Driven Pumps II: P-type Pumps01:34

ATP Driven Pumps II: P-type Pumps

5.3K
The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
5.3K
ATP Driven Pumps III: V-type Pumps01:30

ATP Driven Pumps III: V-type Pumps

4.1K
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
4.1K
ATP Driven Pumps I: An Overview01:27

ATP Driven Pumps I: An Overview

9.0K
ATP-driven pumps, also known as transport ATPases, are integral membrane proteins. They have binding sites for ATP located on the membrane's cytosolic side and the ion-conducting domain in the transmembrane region. These pumps use the free energy released from ATP hydrolysis to move the solutes across cell membranes against an electrochemical gradient.
There are four main types of ATP-driven pumps - P-type, V-type, F-type, and ABC transporter. All these pumps are of varying complexities and...
9.0K

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A Tactile Automated Passive-Finger Stimulator TAPS
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ポンプカセットによるアクティブメカニカル吸収

Liang Feng1, Yunyan Qiu1, Qing-Hui Guo2,3

  • 1Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.

Science (New York, N.Y.)
|October 21, 2021
PubMed
まとめ
この要約は機械生成です。

この研究は,分子ポンプを使用して機械的結合を作成する新しい吸収モードである機械吸収を導入します. この非均衡のプロセスは エネルギーを 超安定状態に保存し 表面の化学制御を変化させます

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関連する実験動画

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科学分野:

  • 表面科学
  • 材料化学
  • 物理化学

背景:

  • 吸収は伝統的にバランス系で研究され,物理吸収 (ヴァン・ダー・ワールス力) と化学吸収 (電子相互作用) に焦点を当てている.
  • 既存の方法は,吸収プロセスとインタフェースでのエネルギー貯蔵のダイナミックな制御が欠けている.

研究 の 目的:

  • 新しい吸着メカニズムを 示すために
  • 吸着剤と吸着剤の間の機械的結合を生み出すための非均衡ポンプの可能性を調査する.
  • 化学コンデンサを介して 超安定状態でのエネルギー貯蔵を調査する.

主な方法:

  • 分子ポンプで埋め込まれた金属-有機フレームワークを使用します.
  • アドソーバートの輸送を推進するための非均衡ポンプの実施.
  • エネルギーを貯蔵するために,コンパートメントの間の潜在的グラデーションを作成します.

主要な成果:

  • 機能化された金属有機構造面での機械吸収が成功している.
  • 大量からインターフェースへのアドソルバートの輸送を達成し,機械的結合を形成します.
  • メタステーブルな状態でエネルギーを貯蔵する 化学コンデンサを確立した.

結論:

  • 機械吸収は,吸収現象の範囲を根本的に拡大します.
  • このアクティブアドソープションモードは,表面とインターフェースの化学制御に変換的なアプローチを提供します.
  • 分子レベルで新しいエネルギー貯蔵メカニズムを可能にします.