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Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
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Fates of Pyruvate01:20

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Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
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Metabolism of Chemolithotrophs01:15

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Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Related Experiment Video

Updated: Apr 27, 2026

Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction
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Capturing Actively Produced Microbial Volatile Organic Compounds from Human-Associated Samples with Vacuum-Assisted Sorbent Extraction

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Volatile metabolites.

Daryl D Rowan1

  • 1The New Zealand Institute for Plant and Food Research Limited, Private Bag 11600, Palmerston North 4442, New Zealand. daryl.rowan@plantandfood.co.nz.

Metabolites
|June 25, 2014
PubMed
Summary
This summary is machine-generated.

Volatile organic compounds (VOCs) are crucial signaling molecules in nature. Recent innovations in metabolomics are expanding our understanding of their diverse ecological roles and analytical challenges.

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Area of Science:

  • Metabolomics
  • Analytical Chemistry
  • Ecology

Background:

  • Volatile organic compounds (VOCs) are diverse, low molecular weight compounds with significant vapor pressure.
  • VOCs play vital roles in plant-pollinator interactions, defense mechanisms, insect communication (pheromones), and human health (biomarkers).
  • Marine environments are significant sources of unique VOCs involved in elemental cycling.

Purpose of the Study:

  • To review recent advancements in volatile organic compound research.
  • To highlight the impact of technical innovations on volatile analysis and research areas.
  • To explore the role of VOCs as semiochemicals in mediating ecological interactions.

Main Methods:

  • Review of recent literature on volatile organic compounds.
  • Focus on metabolomics approaches.
  • Emphasis on technical innovations in analytical methods for VOCs.

Main Results:

  • Technical innovations are enabling broader analysis of VOCs.
  • New research areas are emerging due to improved analytical capabilities.
  • A deeper understanding of VOC-mediated ecological interactions is being developed.

Conclusions:

  • Accurate measurement of VOCs is essential for understanding biological systems.
  • Metabolomics and technological advancements are crucial for advancing VOC research.
  • VOCs are key mediators of complex ecological interactions.