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Related Concept Videos

First Law of Thermodynamics00:37

First Law of Thermodynamics

The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed. This can be demonstrated within a classic food web where light energy from the sun is harnessed as radiant energy by plants, converted into chemical energy, and stored as complex carbohydrates. The vegetation is then consumed by animals and during the digestion process, the sugars release energy as heat. The sugars also produce chemical energy that either gets used up doing work, stored in...
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The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
Second Law of Thermodynamics00:53

Second Law of Thermodynamics

The Second Law of Thermodynamics states that entropy, or the amount of disorder in a system, increases each time energy is transferred or transformed. Each energy transfer results in a certain amount of energy that is lost—usually in the form of heat—that increases the disorder of the surroundings. This can also be demonstrated in a classic food web. Herbivores harvest chemical energy from plants and release heat and carbon dioxide into the environment. Carnivores harvest the chemical energy...
Trophic Efficiency00:46

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Energy Basics02:27

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Related Experiment Video

Updated: Jun 14, 2026

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
09:10

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents

Published on: November 1, 2019

Food, energy, and the environment.

S L Pardue1

  • 1Department of Poultry Science, North Carolina State University, Raleigh, NC 27695, USA. sam_pardue@ncsu.edu

Poultry Science
|March 24, 2010
PubMed
Summary
This summary is machine-generated.

Future agricultural research must adapt to global challenges like climate change and resource scarcity. New models are essential to ensure sustainable food production for a growing world population.

Related Experiment Videos

Last Updated: Jun 14, 2026

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents
09:10

Palatable Western-style Cafeteria Diet as a Reliable Method for Modeling Diet-induced Obesity in Rodents

Published on: November 1, 2019

Area of Science:

  • Agricultural Science
  • Environmental Science
  • Food Security

Background:

  • The 2009 Poultry Science Association symposium addressed critical issues in global agriculture.
  • Key topics included research funding, sustainability, bioenergy, and global food markets.
  • Agriculture's impact is significant due to population growth and increasing food demands.

Purpose of the Study:

  • To highlight the importance of agricultural practices in the face of global challenges.
  • To discuss the need for reevaluating agricultural research structures and policies.
  • To emphasize the connection between agricultural research models and future food security.

Main Methods:

  • The abstract is based on discussions from a symposium.
  • It synthesizes expert perspectives on current and future agricultural issues.
  • No specific experimental methods are detailed.

Main Results:

  • Historic agricultural productivity gains have often relied on increased inputs, particularly fossil fuels.
  • Future food production faces challenges from energy, water scarcity, climate change, and agroterrorism.
  • Adaptations like drought-resistant crops and alternative animal feedstuffs are necessary.

Conclusions:

  • The traditional agricultural research model, while successful, requires reevaluation.
  • Adapting to environmental and resource constraints is crucial for future food security.
  • The chosen research model will determine future global food availability.