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Author: Fernand Joly
Publisher: John Wiley & Sons
ISBN: 1119808286
Category : Nature
Languages : en
Pages : 176
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Book Description
The wild beauty of deserts has always been a source of fascination the world over. Mankind and Deserts 2 – the second of three volumes – focuses on water, its absence or indeed its extreme scarcity, as well as on the ways in which salts come to be formed in areas such as these. Aridity of the climate does not exclude rainfall, after which deserts flourish; wet mists, dew, exceptional events separated by years of total drought. Water flows into temporary and disorganized networks but, occasionally, large rivers cross the deserts, giving rise to vibrant civilizations: the Nile, Tigris and Euphrates, Niger, to name a few. Temporary or permanent lakes collect water in basins without outlet to the ocean, referred to as endorrheic basins, such as Lake Chad. This results in salt accumulation and evaporitic formations. A large variety of salts crystallize, in addition to halite, among which is potash. Halite – common salt – is an essential resource and its trade leads to the creation of salt caravans, used to exchange it with gold, even on a 1-1 weight basis, generating subsequent wealth. From ancient, almost mythical, exploration to modern scientific studies, deserts have come to be better known yet still hold great appeal. This book traces the history of their knowledge while providing a basis for understanding their features and the tools needed for their protection, in an ever-changing world.
Author: Fernand Joly
Publisher: John Wiley & Sons
ISBN: 1119808286
Category : Nature
Languages : en
Pages : 176
Get Book Here
Book Description
The wild beauty of deserts has always been a source of fascination the world over. Mankind and Deserts 2 – the second of three volumes – focuses on water, its absence or indeed its extreme scarcity, as well as on the ways in which salts come to be formed in areas such as these. Aridity of the climate does not exclude rainfall, after which deserts flourish; wet mists, dew, exceptional events separated by years of total drought. Water flows into temporary and disorganized networks but, occasionally, large rivers cross the deserts, giving rise to vibrant civilizations: the Nile, Tigris and Euphrates, Niger, to name a few. Temporary or permanent lakes collect water in basins without outlet to the ocean, referred to as endorrheic basins, such as Lake Chad. This results in salt accumulation and evaporitic formations. A large variety of salts crystallize, in addition to halite, among which is potash. Halite – common salt – is an essential resource and its trade leads to the creation of salt caravans, used to exchange it with gold, even on a 1-1 weight basis, generating subsequent wealth. From ancient, almost mythical, exploration to modern scientific studies, deserts have come to be better known yet still hold great appeal. This book traces the history of their knowledge while providing a basis for understanding their features and the tools needed for their protection, in an ever-changing world.
Author: Fernand Joly
Publisher: John Wiley & Sons
ISBN: 1786306301
Category : Science
Languages : en
Pages : 176
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Book Description
The wild beauty of deserts has always been a source of fascination the world over. Mankind and Deserts 1 – the first of three volumes – describes their location and geographic variety. There are both hot and cold deserts, those at high altitude or those at sea level, differing in climate but sharing the scarcity of water, extreme temperatures and often violent winds. According to paleoclimate evidence, however, deserts have not always been as arid as they are today. Deserts were a source of inspiration for many spiritual leaders, among them, Moses, Jesus and Muhammad; as well as conquerors, from Alexander the Great to Genghis Khan. Some avoided these deserts, or crossed them as fast as they could. Others adapted to them and developed vibrant civilizations and cities. From ancient, almost mythical, exploration to modern scientific studies, deserts have come to be better known yet still hold great appeal. This book traces the history of their knowledge while providing a basis for understanding their features and the tools needed for their protection, in an ever-changing world.
Author: Fernand Joly
Publisher: John Wiley & Sons
ISBN: 1786306328
Category : Nature
Languages : en
Pages : 210
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Book Description
The wild beauty of deserts has always been a source of fascination the world over. Mankind and Deserts 3 – the third and final volume – focuses on wind, frequently present in all deserts, either hot or cold. Wind plays a major role in aridity and landscapes bear numerous forms due to its action, erosion, transportation and surface formations, some discreet and others spectacular, such as vast expanses of towering yardangs. Aeolian dynamics lead to dune formation, simple or associated with sand ridges or ergs, as in the Sahara. Mankind has attempted, to varying degrees of success, to cope with sand accumulation; ignoring aeolian dynamics has led many development projects to failure. This is developed by Yann Callot, a Professor at Lyon University who studied aeolian dynamics in the Sahara. Traditional societies have adapted to live in deserts, establishing vibrant civilizations with original ways of living, managing water resources and creating routes for trade, especially for salt. In a changing environment, useful lessons can be drawn from the genius of mankinds adaptation to such diverse and fragile environments. This is explained by Marc Côte, who was a Professor at Constantine (Algeria) and Aix-en-Provence Universities. From ancient, almost mythical, exploration to modern scientific studies, deserts have come to be better known yet still hold great appeal. This book traces the history of their knowledge while providing a basis for understanding their features and the tools needed for their protection, in an ever-changing world.
Author: Joel Fleurence
Publisher: John Wiley & Sons
ISBN: 1786305879
Category : Nature
Languages : en
Pages : 194
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Book Description
Microalgae and cyanobacteria are the first organisms in the oceanic food chain and are essential producers of oxygen and effective carbon dioxide traps. They are traditional sources of food proteins for Aztec, African and Asian populations, and some of them have even acquired the status of superfoods. Microalgae reviews the biological, ecological and biochemical characteristics of microalgae and cyanobacteria. They are true cellular factories, producing substances of interest such as original pigments, proteins and polysaccharides with biological activities. Their use covers many sectors of human activity including aquaculture, livestock breeding, agri-food, and human and veterinary medicine. This book presents their mode of production and the transformation processes that are applied to them, as well as the traditional and future valorization of algae. As they are a source of lipids and fatty acids, microalgae have become the focus of attention for the development of green fuels, such as biofuel.
Author: Jöel Fleurence
Publisher: John Wiley & Sons
ISBN: 1394284306
Category : Science
Languages : en
Pages : 179
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Book Description
Developed over several decades, the concept of aquatic biotechnology refers to aquatic organisms, be they of animal or plant origin. It involves transforming biological resources into products for human and animal consumption. The emergence of transgenic fish (such as AquAdvantage salmon) and their use as foodstuffs has reopened the societal debate on the place of genetically modified organisms in our diet. This new aquaculture based on genetic engineering is known as the "blue revolution." However, "blue" biotechnology is not limited to the production of genetically modified organisms; it also involves the use of biotechnological processes, such as enzymatic hydrolysis and fermentation, on aquatic resources. Aquatic Biotechnologies presents an overview of these biotechnological processes (genetic, enzymatic and fermentative engineering) as applied to aquatic organisms and their production methods (traditional aquaculture and aquaculture producing genetically modified organisms).
Author: Claude Grison
Publisher: John Wiley & Sons
ISBN: 1119887712
Category : Technology & Engineering
Languages : en
Pages : 178
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Book Description
One of the challenges of our modern society is to successfully reconcile growing energy demand, demographic and food pressure and ecological and environmental urgency. This book offers an update on a rapidly evolving subject, that of modern photovoltaic systems capable of combining the needs of energy and ecological transition. Although photovoltaic solar energy is a well-proven technical solution in terms of energy, its development can compete with agricultural land or natural sites. New solutions are emerging: the installation of photovoltaic parks on industrial wasteland; agrivoltaics, which reconcile agricultural activity and energy production on the same surface; and ecovoltaics, which make it possible to make use of the unused surfaces under solar panels by developing ecological solutions capable of providing services to nature. These innovations are part of the response to the need to preserve terrestrial and aquatic ecosystems, halt the decline in animal and plant biodiversity and participate in the development of a new mode of sustainable development and green economy.
Author: Walter G. Whitford
Publisher: Academic Press
ISBN: 0081026552
Category : Science
Languages : en
Pages : 473
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Book Description
Nearly one-third of the land area on our planet is classified as arid or desert. Therefore, an understanding of the dynamics of such arid ecosystems is essential to managing those systems in a way that sustains human populations. This second edition of Ecology of Desert Systems provides a clear, extensive guide to the complex interactions involved in these areas. This book details the relationships between abiotic and biotic environments of desert ecosystems, demonstrating to readers how these interactions drive ecological processes. These include plant growth and animal reproductive success, the spatial and temporal distribution of vegetation and animals, and the influence of invasive species and anthropogenic climate change specific to arid systems. Drawing on the extensive experience of its expert authors, Ecology of Desert Systems is an essential guide to arid ecosystems for students looking for an overview of the field, researchers keen to learn how their work fits in to the overall picture, and those involved with environmental management of desert areas. Highlights the complexity of global desert systems in a clear, concise way Reviews the most current issues facing researchers in the field, including the spread of invasive species due to globalized trade, the impact of industrial mining, and climate change Updated and extended to include information on invasive species management, industrial mining impacts, and the current and future role of climate change in desert systems
Author: Fernand Joly
Publisher: John Wiley & Sons
ISBN: 1119824036
Category : Nature
Languages : en
Pages : 208
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Book Description
The wild beauty of deserts has always been a source of fascination the world over. Mankind and Deserts 3 – the third and final volume – focuses on wind, frequently present in all deserts, either hot or cold. Wind plays a major role in aridity and landscapes bear numerous forms due to its action, erosion, transportation and surface formations, some discreet and others spectacular, such as vast expanses of towering yardangs. Aeolian dynamics lead to dune formation, simple or associated with sand ridges or ergs, as in the Sahara. Mankind has attempted, to varying degrees of success, to cope with sand accumulation; ignoring aeolian dynamics has led many development projects to failure. This is developed by Yann Callot, a Professor at Lyon University who studied aeolian dynamics in the Sahara. Traditional societies have adapted to live in deserts, establishing vibrant civilizations with original ways of living, managing water resources and creating routes for trade, especially for salt. In a changing environment, useful lessons can be drawn from the genius of mankindÂs adaptation to such diverse and fragile environments. This is explained by Marc Côte, who was a Professor at Constantine (Algeria) and Aix-en-Provence Universities. From ancient, almost mythical, exploration to modern scientific studies, deserts have come to be better known yet still hold great appeal. This book traces the history of their knowledge while providing a basis for understanding their features and the tools needed for their protection, in an ever-changing world.
Author: Helen Nearing
Publisher: Chelsea Green Publishing
ISBN: 1603581197
Category : Biography & Autobiography
Languages : en
Pages : 226
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Book Description
Helen and Scott Nearing, authors of Living the Good Life and many other bestselling books, lived together for 53 years until Scott's death at age 100. Loving and Leaving the Good Life is Helen's testimonial to their life together and to what they stood for: self-sufficiency, generosity, social justice, and peace. In 1932, after deciding it would be better to be poor in the country than in the city, Helen and Scott moved from New York Ciy to Vermont. Here they created their legendary homestead which they described in Living the Good Life: How to Live Simply and Sanely in a Troubled World, a book that has sold 250,000 copies and inspired thousands of young people to move back to the land. The Nearings moved to Maine in 1953, where they continued their hard physical work as homesteaders and their intense intellectual work promoting social justice. Thirty years later, as Scott approached his 100th birthday, he decided it was time to prepare for his death. He stopped eating, and six weeks later Helen held him and said goodbye. Loving and Leaving the Good Life is a vivid self-portrait of an independent, committed and gifted woman. It is also an eloquent statement of what it means to grow old and to face death quietly, peacefully, and in control. At 88, Helen seems content to be nearing the end of her good life. As she puts it, "To have partaken of and to have given love is the greatest of life's rewards. There seems never an end to the loving that goes on forever and ever. Loving and leaving are part of living." Helen's death in 1995 at the age of 92 marks the end of an era. Yet as Helen writes in her remarkable memoir, "When one door closes, another opens." As we search for a new understanding of the relationships between death and life, this book provides profound insights into the question of how we age and die.
Author: Srishthi Agarwal
Publisher: Arihant Publications India limited
ISBN: 9325796767
Category :
Languages : en
Pages : 185
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Book Description
With the newly introduced 2 Term Examination Pattern, CBSE has eased out the pressure of preparation of subjects and cope up with lengthy syllabus. Introducing Arihant's CBSE TERM II – 2022 Series, the first of its kind that gives complete emphasis on the rationalized syllabus of Class 9th to 12th. The all new “CBSE Term II 2022 – English Core” of Class 11th provides explanation and guidance to the syllabus required to study efficiently and succeed in the exams. The book provides topical coverage of all the chapters in a complete and comprehensive manner. Covering the 50% of syllabus as per Latest Term wise pattern 2021-22, this book consists of: 1. Complete Theory in each Chapter covering all topics 2. Case-Based, Short and Long Answer Type Question in each chapter 3. Coverage of NCERT, NCERT Examplar & Board Exams’ Questions 4. Complete and Detailed explanations for each question 5. 3 Practice papers based on the entire Term II Syllabus. Table of Content Reading Comprehension – Read Comprehension, Note Making and Summarisation, Creative Writing Skills and Grammar – Writing (Short Writing Tasks), Long Writing Tasks, Grammar, Integrated Grammar Exercises, Literature: Hornbill Pose , Hornbill Poetry, Snapshots – Supplementary, Practice Papers (1-3).