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Oil-related activities damage tropical rainforests, but this is just one side of a complicated story.
The Vomeronasal Organ is an olfactory structure in the nose, originally described in 1813 by the Danish court veterinarian Ludwig Jacobson. After some 150 years interest in it was reawakened, following the discovery of its key role in social and sexual responses. The organ serves to alert the emotional brain to the presence of specific semiochemicals, or signal molecules, which identify sex or status. Typically, such scents elicit responses at a non-conscious level -- altering internal chemistry (hormones) in reaction to odours from the social environment (pheromones). The importance of vomerolfaction has recently been confirmed by findings on the genetic basis of smell.This book surveys the biology of the "Organ of Jacobson" from toads to tamarins. It provides an analysis of the neural pathway which processes pheromonal information delivered by the 'second nose' to the brain. Vomeronasal olfaction is examined in its evolutionary perspective, from molecular capture of scents to the consequent changes in reproductive activity.The treatment integrates structural and functional aspects with the system's development, and considers the implications of its unique genome. The student or researcher is lead up to the edge of contemporary thinking by an overview of vomerolfactory contributions to individual survival and to population dynamics. The issues raised by recent research are evaluated in relation to the properties of primary olfaction. Questions posed by the persistence of vomerolfaction as a distinct sense are explored for man and other higher primates.
As forests decline in temperate and tropical climates, highly-developed countries and those striving for greater economic and social benefits are beginning to utilize marginal forests of high-latitude and mountainous regions for resources to satisfy human needs. The benefits of marginal forests range from purely aesthetic to providing resources for producing many goods and services demanded by a growing world population. Increased demands for forest resources and amenities and recent warming of high- latitude climates have generated interest in reforestation and afforestation of marginal habitats in cold regions. Afforestation of treeless landscapes improves the environment for human habitation and provides for land use and economic prosperity. Trees are frequently planted in cold climates to rehabilitate denuded sites, for the amenity of homes and villages, and for wind shelter, recreation, agroforestry, and industrial uses. In addition, forests in cold climates reduce the albedo of the earth's surface in winter, and in summer they are small but significant long-lived sinks for atmospheric carbon dioxide. Finally, growth and reproductive success of forests at their geographic limits are sensitive indices of climatic change. As efforts to adapt forests to cold climates increase, however, new afforestation problems arise and old ones intensify. Austral, northern, and altitudinal tree limits are determined by many different factors. Current hypotheses for high-latitude tree limits are based on low growing-season temperatures that inhibit plant development and reproduction.
This comprehensive text clarifies the rules and practices of descriptive and subject cataloging of Hebrew-alphabet materials. At the same time it chronicles the historical and descriptive cataloging and classification traditions in two centers of Hebrew cataloging-Washington and Jerusalem. The authors provide guidelines for formulating headings and uniform titles; analyze and demonstrate systems for transliteration and transcription; and trace (structurally and historically) classification systems for Judaica, Hebraica, and Israelitica. Librarians with Internet access to Israeli systems will also find the tools they need to search and understand those catalogs. This exploration and comparison of the approaches of America's RLIN and Israel's ALEPH bibliographic networks closes with an analysis of the potential for exchanging Hebrew bibliographic data and a forecast of the implication of automation for the future of Hebrew cataloging worldwide.
Be encouraged and inspired by this journey through time as we look at the life and legacy of a woman born during the 30's in the middle of the South. Surrounded by racism and bigotry, discover how one small community in Georgia existed in segregation without experiencing the backlash and rage other blacks families endured.Raised by two profound women and emotionally supported throughout her live by other great women, experience one woman's triumphs. Share the heartaches and joys of a mother's love.
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Mining Jobs No Experience