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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Histone Modification02:32

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
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The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
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Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
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相关实验视频

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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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增强微藻基微生物燃料电池性能,使用单光催化剂空气阴极修饰.

Hnin Thandar Myint1, Yuka Yokoi2, Lulu'atul Hamidatu Ulya3

  • 1School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok 10150, Thailand.

Bioelectrochemistry (Amsterdam, Netherlands)
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概括
此摘要是机器生成的。

基于微藻的微生物燃料电池 (AMFC) 显示出对清洁能源的承诺. 改造的石墨光催化剂阴极和并行电气连接大大提高了发电量,提供了一个可持续的替代方案.

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科学领域:

  • 可再生能源可再生能源是可再生能源.
  • 电化学 电化学 电化学
  • 环境科学 环境科学

背景情况:

  • 全球能源需求和气候变化需要化石燃料的可持续替代品.
  • 基于光合作用微藻的微生物燃料电池 (AMFC) 为能源发电提供了一个有前途的生物电化学方法.
  • 优化AMFC组件对于增强其实际应用至关重要.

研究的目的:

  • 为了改善单室AMFCs的发电.
  • 为了研究修改后的石墨光催化剂空气阴极对输出功率的影响.
  • 评估不同电气配置 (串行,并行,混合) 对AMFC性能的影响.

主要方法:

  • 使用TiO2和MnO2光催化剂制造和测试改性石墨空气阴极.
  • 测量AMFC产生的功率密度,使用不同的阴极修改.
  • 在串行,并行和混合电气连接下分析AMFC性能.

主要成果:

  • 一个25%的TiO2-石墨混合阴极实现了功率密度为5.56±0.32mW/m2.
  • 制造的光催化剂空气阴极显著提高了功率密度.
  • 平行电气连接产生了最高的功率密度 (23.82 ± 3.72 mW / m2),而混合配置提供了平衡的输出.

结论:

  • 修改的石墨光催化剂空气阴极在增强AMFC发电方面是有效的.
  • 电气配置极大地影响AMFC性能,并行连接是最大功率的最佳选择.
  • 这些发现支持AMFC作为可再生能源回收成本高效技术的潜力.