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Related Concept Videos

What is Metabolism?00:52

What is Metabolism?

Overview
Overview of Metabolism01:40

Overview of Metabolism

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.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this nitrogen...
Introduction to Metabolism01:30

Introduction to Metabolism

Metabolism encompasses all biochemical reactions in a living organism, facilitating both the breakdown and synthesis of biomolecules. These metabolic processes are categorized into catabolic and anabolic pathways, which operate in a coordinated manner to ensure energy balance and cellular function.Catabolic Pathways and Energy ReleaseCatabolic pathways involve the breakdown of complex macromolecules such as carbohydrates, lipids, and proteins into smaller structures like monosaccharides, fatty...
Metabolism of Chemolithotrophs01:15

Metabolism of Chemolithotrophs

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. However, because inorganic electron donors...
Amino Acid Catabolism01:18

Amino Acid Catabolism

Microorganisms rely on proteins as an essential carbon and energy source, particularly in environments with limited polysaccharides or lipids. However, proteins are too large to cross the plasma membrane unaided, necessitating enzymatic degradation. Microbes secrete extracellular proteases and peptidases that hydrolyze proteins into peptides, which can then be transported across the membrane. Once inside the cell, intracellular proteases degrade these peptides into free amino acids, which...

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Updated: May 25, 2026

The Use of an Automated System (GreenFeed) to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals
11:02

The Use of an Automated System (GreenFeed) to Monitor Enteric Methane and Carbon Dioxide Emissions from Ruminant Animals

Published on: September 7, 2015

Rumen metabolism.

R L Baldwin, M J Allison

    Journal of Animal Science
    |July 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Significant advancements in understanding ruminant digestive function have improved animal production. Future efforts focusing on quantitative applications of this knowledge promise even greater benefits for livestock productivity.

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    Measuring Liver Mitochondrial Oxygen Consumption and Proton Leak Kinetics to Estimate Mitochondrial Respiration in Holstein Dairy Cattle

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    Published on: September 7, 2015

    Workflow Based on the Combination of Isotopic Tracer Experiments to Investigate Microbial Metabolism of Multiple Nutrient Sources
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    Measuring Liver Mitochondrial Oxygen Consumption and Proton Leak Kinetics to Estimate Mitochondrial Respiration in Holstein Dairy Cattle

    Published on: November 30, 2018

    Area of Science:

    • Ruminant physiology
    • Microbial ecology
    • Animal nutrition

    Background:

    • Ruminant digestive function understanding has significantly advanced over the past 25 years.
    • Past improvements in animal production were achieved through qualitative knowledge application.
    • Current research emphasizes quantitative application for potentially greater benefits.

    Purpose of the Study:

    • To review the progress in understanding ruminant digestive function.
    • To highlight the characterization of major rumen microbes and their interactions.
    • To discuss the development of quantitative relationships for optimizing animal productivity.

    Main Methods:

    • Review of scientific literature on ruminant digestion and microbial ecology.
    • Analysis of advancements in characterizing rumen microbial functions and interactions.
    • Assessment of progress in developing quantitative models for feed composition and digestive processes.

    Main Results:

    • Major rumen microbes are largely identified, with their nutritional and biochemical characteristics well-defined.
    • Complex interactions among rumen microbes enhance the digestion of carbohydrates like cellulose.
    • Significant progress has been made in establishing quantitative relationships for ruminant feed evaluation and productivity manipulation.

    Conclusions:

    • Qualitative understanding has driven past improvements in animal production.
    • Quantitative application of current knowledge is expected to yield substantial future benefits.
    • Further development of quantitative models is crucial for optimizing ruminant productivity through feed and digestive process manipulation.