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The study of the energy changes involved in physical and chemical reactions and in overall systems.


The study of energy, esp. in relation to human use of energy in the form of food and the expenditure of energy in work or athletic exercise.
References in periodicals archive ?
guidelines are developed to ensure compliance with ecosystem principles,
which ecosystem principles are used hi fisheries management and to
Third, ecosystem principles provide core resources for understanding and responding to complex environment, health, and sustainability challenges--through concepts such as systems interactions, ecological hierarchies, ecosystem services, and the mutually constitutive relations within and among biotic and abiotic influences on health (Kay et al.
The prism illustrates the three converging themes outlined in this commentary: the need for integrated approaches to research and policy, methods that can engage with the synergies between the social and physical environment, and the incorporation of ecosystem principles into research and practice.

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