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The use of essential oils by civilisations constitutes a common practice since antiquity. In earlier times, China, India and the Middle East used herbs and oils in cooking, cosmetics, medicine and in religious rituals. These substances come from a secondary metabolism of plants and are associated with several functions necessary for their survival, such as the defense against microorganisms, predators and attraction of pollinators. Essential oils are composed of a complex mixture of biologically active substances, lipophilic and volatile, and in most cases derivatives of terpene compounds and in a lower occurrence - phenylpropanoids. They have been long recognised for their medicinal uses: antibacterial, antifungal, antiviral, insecticidal and their antioxidant properties. The increased interest in alternative natural substances is driving the research community to find new uses and applications of these substances. This book provides research on the historical significance, chemical composition and medicinal uses and benefits of essential oils. Some of the topics discussed include extraction methods of essential oils; an overview of the most relevant essential oil changes regarding plant phenology and plant development; the antibacterial properties of some essential oils; essential oils applications in agriculture; and the use of essential oils as additives in broiler diets.
The first chapter in this fourth volume of "Climate, Energy, and Environment: Issues, Analyses, and Developments" presents current topical research in the study of green building services, which include construction, architecture, engineering, and related activities aimed at creating sustainable structures using environmentally responsible processes and materials. Chapter Two discusses industry trends, global competition, and federal support of U.S. solar photovoltaic manufacturing. Chapter Three identifies the mechanisms behind the surprising decline in U.S. petroleum consumption relative to both recent levels and past projections. Chapter Four discusses the scientific understanding of the effects of ocean acidification; the extent to which federal agencies have implemented the Federal Ocean Acidification Research and Monitoring Act of 2009 (FOARAM); and additional actions, if any, that could be taken to advance the federal response to ocean acidification. Chapter Five provides a summary of recommendation for carbon dioxide storage in unconventional reservoirs workshop. Chapter Six concludes this volume with a description of the issues facing corrections policy and leadership as the impacts of climate change and its related consequences confront departments, agencies, and facilities in coming years.
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