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相关概念视频

What is Metabolism?00:52

What is Metabolism?

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Carbohydrate Metabolism01:36

Carbohydrate Metabolism

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Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
Starch accounts for approximately 60% of the carbohydrates consumed by humans. Since amylase enzymes cannot function in the stomach's acidic environment, starch can only be digested in the mouth and small intestine. Simple sugars are found naturally in milk and fruits in...
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What is Evolutionary History?02:35

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Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
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Autofluorescence Imaging to Evaluate Cellular Metabolism
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一种基于进化算法和代谢网络评估的新型代谢途径设计方法.

Xin Zhao1, Xueying Sun1, Tao Zhang1

  • 1School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China.

Journal of chemical information and modeling
|February 3, 2026
PubMed
概括

代谢工程师现在可以通过EA-MNE (基于进化算法的代谢网络评估) 改进微生物合成. 这种方法可以解释分支反应,提高路径设计的准确性和微生物系统的效率.

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科学领域:

  • 代谢工程和合成生物学
  • 计算生物学和生物信息学

背景情况:

  • 代谢途径的设计是微生物合成有价值化合物的关键.
  • 当前的工具往往忽视分支反应,导致次优途径选择.
  • 分支反应转移了新陈代谢的流量,减少了目标化合物的产量.

研究的目的:

  • 引入一种新的代谢途径设计方法,EA-MNE,它解决了分支反应.
  • 提高微生物系统中途径评估和合成效率的准确性.
  • 开发新的标准来评估分支反应的影响.

主要方法:

  • 开发了EA-MNE (基于进化算法的代谢网络评估).
  • 提出了一种将线性途径扩展到代谢网络的方法.
  • 引入了两个新的评估标准:有效的分支反应和网络理论收益率.
  • 整合了四个标准:分支反应,网络理论产量,网络毒性和吉布斯自由能量.

主要成果:

  • 欧洲国家安全局 (EA-MNE) 系统地应对分支反应带来的挑战.
  • 该方法提高了代谢途径评估的准确性.
  • 在微生物系统中实现了更好的合成效率.
  • 新的标准有效量化收益率损失和分支影响.

结论:

  • EA-MNE为考虑分支反应的代谢途径设计提供了一个系统的解决方案.
  • 该方法显著提高了路径评估的准确性.
  • 这导致微生物生产系统的合成效率提高.