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相关概念视频

Active Transport01:14

Active Transport

2.0K
Active transport is a critical biological process that allows cells to move solutes against an electrochemical gradient. This process requires direct energy input and is characterized by its selectivity, saturability, and susceptibility to competitive inhibition.
Primary active transporters, like Na+, K+ and -ATPase, directly utilize ATP to move ions across the membrane. These transporters play significant roles in various physiological processes. For instance, Na+, K+ and -ATPase maintain...
2.0K
Primary Active Transport01:29

Primary Active Transport

13.6K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
13.6K
Primary Active Transport01:47

Primary Active Transport

196.2K
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
196.2K
Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

2.0K
The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
2.0K
Secondary Active Transport01:32

Secondary Active Transport

9.3K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme "pump" embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
9.3K
Secondary Active Transport01:55

Secondary Active Transport

136.9K
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this process is sodium (Na+), which is typically present in higher concentrations extracellularly than in the cytosol. Such a concentration difference is due, in part, to the action of an enzyme “pump” embedded in the cellular membrane that actively expels Na+ from a cell. Importantly, as this pump contributes to the high concentration of...
136.9K

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相关实验视频

Updated: Jan 14, 2026

Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons
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Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons

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单原子激活的多阶段活性站点,用于彻底利用.

Shengyong Gao1,2, Yibo Zhu1, Ke Shi1

  • 1State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials Technology, Beijing University of Chemical Technology, Beijing, PR China.

Nature communications
|October 20, 2025
PubMed
概括

的单个原子固定在碳纳米纤维上,动态调整它们的协调,增强离子吸附,并允许均沉积. 这一突破使离子电池能够稳定循环,为先进的能量存储铺平了道路.

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Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
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Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

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Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
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相关实验视频

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Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons
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Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
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Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane

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Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays
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Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 纳米技术 纳米技术

背景情况:

  • 单原子催化剂在指导电池中的沉积方面具有独特的优势.
  • 了解协调环境对单原子活动的影响对于优化性能至关重要.
  • 目前调整单原子催化剂的策略需要进一步探索.

研究的目的:

  • 用动态协调的锡单个原子开发碳纳米纤维薄膜.
  • 研究协调模式对锡原子活动和沉积的影响.
  • 为了提高离子电池的稳定性和性能.

主要方法:

  • 碳纳米纤维薄膜与固定单个原子的合成.
  • 动态协调模式的特征 (N3O1到N1O3).
  • 对称的电池和无阳极的全电池的电化学测试.

主要成果:

  • 的单个原子增强了离子吸附,并激活了远程的碳原子.
  • 协调环境显著影响锡原子活动,较高的协调显示出更大的活动.
  • 优化的锡碳宿主使沉积和剥离均,在对称细胞中实现1200小时的稳定循环.
  • 没有阳极的全电池在700个循环后显示94%的容量保留.

结论:

  • 单个原子的动态协调提供了一种新的方法来调整催化活性.
  • 开发的锡碳宿主有效促进均的沉积,这对电池的寿命至关重要.
  • 这项工作为先进的离子电池的协调控制单原子催化提供了洞察力.