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相关概念视频

What is Glycolysis?00:56

What is Glycolysis?

178.0K
Overview
Cells make energy by breaking down macromolecules. Cellular respiration is the biochemical process that converts "food energy" (from the chemical bonds of macromolecules) into chemical energy in the form of adenosine triphosphate (ATP). The first step of this tightly regulated and intricate process is glycolysis. The word glycolysis originates from the Latin glyco (sugar) and lysis (breakdown). Glycolysis serves two main intracellular functions: generating ATP and generating...
178.0K
Energy-releasing Steps of Glycolysis01:28

Energy-releasing Steps of Glycolysis

147.2K
Glycolysis is divided into two phases based on whether energy is utilized or released. While the first phase consumes ATP, the second phase produces energy in the form of ATP and NADH. The energy is released over a sequence of reactions that turns G3P into pyruvate. The energy-releasing phase—steps 6-10 of glycolysis—occurs twice, once for each of the two 3-carbon sugars produced during steps 1-5 of the first phase.
The first energy-releasing step—the 6th step of glycolysis...
147.2K
Outcomes of Glycolysis01:13

Outcomes of Glycolysis

107.7K
Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...
107.7K
Energy-requiring Steps of Glycolysis01:20

Energy-requiring Steps of Glycolysis

172.0K
Glucose is the source of nearly all energy used by organisms. The first step of converting glucose into usable energy is called glycolysis. Glycolysis occurs in the cytosol of the cell over two phases: an energy-requiring phase and an energy-releasing phase. Over the first three steps, glucose is converted into different forms and attached to two phosphate groups donated by two ATP molecules, resulting in an unstable sugar. In the next two stages, the unstable sugar splits into two sugar...
172.0K
Glycolysis01:23

Glycolysis

1.7K
Glycolysis, the Embden-Meyerhof pathway, is a central metabolic pathway involved in glucose catabolism. It is highly conserved across most organisms, reflecting its fundamental role in cellular energy production. This process occurs in the cytoplasm and can function both in the presence and absence of oxygen, making it versatile for various organisms and environmental conditions.Stages of GlycolysisGlycolysis is a ten-step pathway that converts glucose into pyruvate, generating a net gain of...
1.7K
Glycolysis: Preparatory Phase01:21

Glycolysis: Preparatory Phase

17.1K
In cellular metabolism (the complete breakdown of glucose to extract energy),  glycolysis is the first step. Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells. Glucose enters heterotrophic cells in two ways. One method is through secondary active transport, where the transport takes place against the glucose concentration gradient. The other mechanism uses a group of integral proteins called GLUT proteins, also known as glucose transporter proteins. These...
17.1K

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相关实验视频

Updated: Feb 12, 2026

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
09:53

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture

Published on: May 13, 2018

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质子海绵:一种芳香糖解催化剂.

Robbie A Clark1, Ciaran W Lahive1, Michael P Shaver1

  • 1Sustainable Materials Innovation Hub, Henry Royce Institute, University of Manchester Manchester M13 9BL UK michael.shaver@manchester.ac.uk.

RSC advances
|February 11, 2026
PubMed
概括

一种新型的质子海绵 (PS) 器官催化剂通过糖解有效地去聚合聚乙烯二甲 (PET) 塑料废物. 在温和的条件下,这种方法可以获得高2-乙烯甲酸 (BHET) 的产量,提供了一个有前途的回收解决方案.

科学领域:

  • 聚合物化学 聚合物化学
  • 有机化学 有机化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 化学去聚合对于回收聚乙烯二甲 (PET) 塑料至关重要,特别是对于不适合机械回收的废物流.
  • 使用乙烯基醇 (EG) 和催化剂的糖解是一种有前途的PET脱聚合技术.

研究的目的:

  • 引入1,8-bis(dimethylamino) naphthalene (质子海绵,PS) 作为PET糖解的新型有机催化剂.
  • 为了研究PS催化PET糖解的效率,动力学和可扩展性.

主要方法:

  • 使用乙烯基醇 (EG) 和1,8-bis (dimethylamino) 纳 (PS) 作为有机催化剂进行了PET糖解.
  • 分析了反应动力学,并将催化剂性能与非芳香基相比较.
  • 该过程在10克尺度上进行了演示,具有不同的催化剂负载和空气耐受性.

主要成果:

  • 在180°C的45分钟时间内,PS使 bis(2-乙基) 甲基甲酸盐 (BHET) 的产量达到89%,使用了20mol%的催化剂和10等值. EG. EG. 在这个问题上.
  • 与非芳香催化剂相比,PS表现出更快的PET膨胀和更短的诱导时间.
  • 反应遵循伪第一阶动力学 (R2 > 0.98),激活能量为126.3kJ mol-1.1.

更多相关视频

The Polyvinyl Alcohol Sponge Model Implantation
06:23

The Polyvinyl Alcohol Sponge Model Implantation

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HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
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HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

Published on: July 23, 2016

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相关实验视频

Last Updated: Feb 12, 2026

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture
09:53

Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture

Published on: May 13, 2018

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The Polyvinyl Alcohol Sponge Model Implantation
06:23

The Polyvinyl Alcohol Sponge Model Implantation

Published on: April 18, 2012

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HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
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HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin

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  • PS催化对空气具有耐受性,并且在降低5mol%的负载下有效,在10g尺度下产生64%的BHET (>99%纯度).

    • 结论:

    • 1,8-bis(dimethylamino) 纳烯 (PS) 是一种高效的新型有机催化剂,用于PET糖解.
    • 聚氨酸的芳香性有助于其增强的催化活性.
    • 聚乙烯催化糖解为PET回收利用提供了一种可行且高效的方法,具有进一步优化潜力.