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Author: G. Scott
Publisher: Springer Science & Business Media
ISBN: 9401105715
Category : Technology & Engineering
Languages : en
Pages : 284
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Book Description
Few scientific developments in recent years have captured the popular imagination like the subject of'biodegradable' plastics. The reasons for this are complex and lie deep in the human subconscious. Discarded plastics are an intrusion on the sea shore and in the countryside. The fact that nature's litter abounds in the sea and on land is acceptable because it is biodegradable - even though it may take many years to be bioassimilated into the ecosystem. Plastics litter is not seen to be biodegradable and is aesthetically unacceptable because it does not blend into the natural environment. To the environmentally aware but often scientifically naive, biodegradation is seen to be the ecologically acceptable solution to the problem of plastic packaging waste and litter and some packaging manufacturers have exploited the 'green' consumer with exaggerated claims to 'environmentally friendly' biodegradable packaging materials. The principles underlying environmental degradation are not understood even by some manufacturers of 'biodegradable' materials and the claims made for them have been categorized as 'deceptive' by USA legislative authorities. This has set back the acceptance of plastics with controlled biodegradability as part of the overall waste and litter control strategy. At the opposite end of the commercial spectrum, the polymer manufactur ing industries, through their trade associations, have been at pains to discount the role of degradable materials in waste and litter management. This negative campaign has concentrated on the supposed incompatibility of degradable plastics with aspects of waste management strategy, notably materials recycling.
Author: G. Scott
Publisher: Springer Science & Business Media
ISBN: 9401105715
Category : Technology & Engineering
Languages : en
Pages : 284
Get Book Here
Book Description
Few scientific developments in recent years have captured the popular imagination like the subject of'biodegradable' plastics. The reasons for this are complex and lie deep in the human subconscious. Discarded plastics are an intrusion on the sea shore and in the countryside. The fact that nature's litter abounds in the sea and on land is acceptable because it is biodegradable - even though it may take many years to be bioassimilated into the ecosystem. Plastics litter is not seen to be biodegradable and is aesthetically unacceptable because it does not blend into the natural environment. To the environmentally aware but often scientifically naive, biodegradation is seen to be the ecologically acceptable solution to the problem of plastic packaging waste and litter and some packaging manufacturers have exploited the 'green' consumer with exaggerated claims to 'environmentally friendly' biodegradable packaging materials. The principles underlying environmental degradation are not understood even by some manufacturers of 'biodegradable' materials and the claims made for them have been categorized as 'deceptive' by USA legislative authorities. This has set back the acceptance of plastics with controlled biodegradability as part of the overall waste and litter control strategy. At the opposite end of the commercial spectrum, the polymer manufactur ing industries, through their trade associations, have been at pains to discount the role of degradable materials in waste and litter management. This negative campaign has concentrated on the supposed incompatibility of degradable plastics with aspects of waste management strategy, notably materials recycling.
Author: Ray Smith
Publisher: CRC Press
ISBN: 9780849334665
Category : Technology & Engineering
Languages : en
Pages : 556
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Book Description
The vast majority of plastic products are made from petroleum-based synthetic polymers that do not degrade in a landfill or in a compost-like environment. Therefore, the disposal of these products poses a serious environmental problem. An environmentally-conscious alternative is to design/synthesize polymers that are biodegradable. Biodegradable polymers for industrial applications introduces the subject in part one by outlining the classification and development of biodegradable polymers with individual chapters on polyhydroxyalkanoates, polyesteramides and thermoplastic starch biodegradable polymers and others. The second part explores the materials available for the production of biodegradable polymers. Polymers derived from sugars, natural fibres, renewable forest resources, poly(lactic acid) and protein-nanoparticle composites will be looked at in detail in this section. Part three looks at the properties and mechanisms of degradation, prefacing the subject with a chapter on current standards. The final part explores opportunities for industrial applications, with chapters on packing, agriculture and biodegradable polycaprolactone foams in supercritical carbon dioxide. Biodegradable polymers for industrial applications explores the fundamental concepts concerning the development of biodegradable polymers, degradable polymers from sustainable sources, degradation and properties and industrial applications. It is an authoritative book that will be invaluable for academics, researchers and policy makers in the industry.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309173736
Category : Computers
Languages : en
Pages : 226
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Book Description
The tremendous growth in use of information technology (IT) has led to an increased interest in understanding its social and economic impacts. This book presents examples of crosscutting research that has been conducted to understand the impact of information technology on personal, community, and business activities. It explores ways in which the use of methodology from economics and social sciences contributes to important advances in understanding these impacts. The book discusses significant research issues and concerns and suggests approaches for fostering increased interdisciplinary research on the impacts of information technology and making the results of this research more accessible to the public and policymakers. This volume is expected to influence funding priorities and levels of support for interdisciplinary research of this kind.
Author: Thailand
Publisher:
ISBN:
Category : Constitutions
Languages : en
Pages : 53
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Book Description
Author: Pamela Lyndon Travers
Publisher: Houghton Mifflin Harcourt
ISBN: 9780152017194
Category : Juvenile Fiction
Languages : en
Pages : 340
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Book Description
Mary Poppins comes back on the end of a kite string, stays with the Banks family for a while, and then disappears on a merry-go-round horse.
Author: Raphael M. Ottenbrite
Publisher:
ISBN:
Category : Language Arts & Disciplines
Languages : en
Pages : 288
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Book Description
The theme of the August 1994 symposium was hydrogel biodegradation and bioapplications. Hydrogels are formed by adding a small amount of cross-linked macromolecular material to a large amount of water, which produces an apparent solid. This volume addresses reversible hydrogels, stimuli-sensitive hydrogels. and some in vivo applications of hydrogels. The volume contains 20 chapters and is directed to organic, physical, polymer, and biochemists as well as biologists, materials scientists, and bioengineers. Annotation copyright by Book News, Inc., Portland, OR
Author: David Cay Johnston
Publisher: Penguin
ISBN: 1591846536
Category : Business & Economics
Languages : en
Pages : 338
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Book Description
A bestselling author’s shocking analysis of the many ways we are victimized by corporations David Cay Johnston, the bestselling author of Perfectly Legal and Free Lunch, is famous for exposing the perfidies of our biggest institutions. Now he turns his attention to the ways huge corporations hide sneaky stipulations in just about every contract, often with government permission. No other modern country gives corporations the unfettered power found in America to gouge customers, shortchange workers, and erect barriers to fair play. Johnston shares solutions you can use to fight back against the obscure fees and taxes, and to help end these devious practices.
Author: David Cay Johnston
Publisher: Penguin
ISBN: 9781591840695
Category : Business & Economics
Languages : en
Pages : 356
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Book Description
Now updated with a new prologue! Since the mid-1970s, there has been a dramatic shift in America's socioeconomic system, one that has gone virtually unnoticed by the general public. Tax policies and their enforcement have become a disaster, and thanks to discreet lobbying by a segment of the top 1 percent, Washington is reluctant or unable to fix them. The corporate income tax, the estate tax, and the gift tax have been largely ignored by the media. But the cumulative results are remarkable: today someone who earns a yearly salary of $60,000 pays a larger percentage of his income in taxes than the four hundred richest Americans. Pulitzer Prize-winning investigative reporter David Cay Johnston exposes exactly how the middle class is being squeezed to create a widening wealth gap that threatens the stability of the country. By relating the compelling tales of real people across all areas of society, he reveals the truth behind: • "Middle class" tax cuts and exactly whom they benefit. • How workers are being cheated out of their retirement plans while disgraced CEOs walk away with millions. • How some corporations avoid paying any federal income tax. • How a law meant to prevent cheating by the top 2 percent of Americans no longer affects most of them, but has morphed into a stealth tax on single mothers making just $28,000. • Why the working poor are seven times more likely to be audited by the IRS than everyone else. • How the IRS became so weak that even when it was handed complete banking records detailing massive cheating by 1,600 people, it prosecuted only 4 percent of them. Johnston has been breaking pieces of this story on the front page of The New York Times for seven years. With Perfectly Legal, he puts the whole shocking narrative together in a way that will stir up media attention and make readers angry about the state of our country.
Author: Joseph Biancalana
Publisher: Cambridge University Press
ISBN: 1139430823
Category : History
Languages : en
Pages : 522
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Book Description
Fee tails were a heritable interest in land which was both inalienable and could only pass at death by inheritance to descendants of the original grantee. Biancalana's study considers the origins of the entail, and the development of a reliable legal mechanism for their destruction, the common recovery.
Author: G. Griffin
Publisher: Springer
ISBN: 0751400033
Category : Technology & Engineering
Languages : en
Pages : 154
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Book Description
Since the early 1970s the subject of biodegradable plastics has acquired a rapidly growing literature of academic research papers. It has also acquired a formidable volume of patent documentation and all this has been over whelmed by an astonishing quantity of serious media and political com ment. A new entrant into any technical arena w. ould, in most technologies, simply visit their technical library and pick up a text book on the subject in the expectation of absorbing the basic facts before launching into the daily task of updating and evaluating. Scientific conferences have produced many substantial volumes carrying the word 'biodegradable' on their covers, and there has even been a specialist monograph on the topic of bacterially produced polymers but, surprisingly, no book has yet emerged providing a general survey of the subject. Having devoted half my pro fessional career to the subject of biodegradable plastics I agreed to take on the editorial job of producing such a book when asked by the publisher. I knew that the task of finding expert specialists and persuading them to contribute dispassionate accounts of their specialisms would not be easy, but the difficulties that I have encountered were far greater than I expected. Some were simply too busy, others were involved in patent disputes or commercial negotiations. In giving an account of the work that I and my students carried out at BruneI University I believe that I have written in a manner that displays enthusiasm without prejudice.
