This introductory text is an important resource for new engineers, chemists, students, and chemical industry personnel to understand the technical aspects of polypropylene which is the 2nd largest synthetics polymer in manufactured output. The book considers the following topics: What are the principal types of polypropylene and how do they differ? What catalysts are used to produce polypropylene and how do they function? What is the role of cocatalysts and how have they evolved over the years? How are industrial polypropylene catalysts tested and the resultant polymer evaluated? What processes are used in the manufacture of polypropylene? What are the biopolymer alternatives to polypropylene? What companies are the major industrial manufacturers of polypropylene? What is the environmental fate of polypropylene?
This book discusses the daily life and culture of enslaved Africans and their descendants. Enslaved Africans and their descendants comprised a significant portion of colonial Virginia populations, with most living on rural slave quarters adjacent to the agricultural fields in which they labored. Archaeological excavations into these home sites have provided unique windows into the daily lifeways and culture of these early inhabitants. subfloor pits be-neath the houses. The most common explanations of the functions of these pits are as storage places for personal belongings or root vegetables, and some contextual and ethnohistoric data suggest they may have served as West African-style shrines. Through analysis of 103 subfloor pits dating from the 17th through mid-19th centuries, Samford reveals how data on shape, location, surface area, and depth, as well as contextual analysis of artifact assemblages, can show how subfloor pits functioned for the enslaved. Archaeology reveals the material circumstances of slaves' lives, which in turn opens the door to illuminating other aspects of life: spirituality, symbolic meanings assigned to material goods, social life, individual and group agency, and acts of resistance and accommodation. about how West African, possibly Igbo, cultural traditions were maintained and transformed in the Virginia Chesapeake.
Critical and theoretical essays by a long-time participant in the Art & Language movement. These essays by art historian and critic Charles Harrison are based on the premise that making art and talking about art are related enterprises. They are written from the point of view of Art & Language, the artistic movement based in England—and briefly in the United States—with which Harrison has been associated for thirty years. Harrison uses the work of Art & Language as a central case study to discuss developments in art from the 1950s through the 1980s. According to Harrison, the strongest motivation for writing about art is that it brings us closer to that which is other than ourselves. In seeing how a work is done, we learn about its achieved identity: we see, for example, that a drip on a Pollock is integral to its technical character, whereas a drip on a Mondrian would not be. Throughout the book, Harrison uses specific examples to address a range of questions about the history, theory, and making of modern art—questions about the conditions of its making and the nature of its public, about the problems and priorities of criticism, and about the relations between interpretation and judgment.
Demystifies the largest volume manmade synthetic polymer by distillingthe fundamentals of what polyethylene is, how it's made and processed,and what happens to it after its useful life is over. Endorsement for Introduction to Industrial Polyethylene "I found this to be a straightforward, easy-to-read, and useful introductory text on polyethylene, which will be helpful for chemists, engineers, and students who need to learn more about this complex topic. The author is a senior polyethylene specialist and I believe we can all benefit from his distillation of knowledge and insight to quickly grasp the key learnings." —R.E. King III; Ciba Corporation (part of the BASF group) Jargon used in industrial polyethylene technology can often be bewildering to newcomers. Introduction to Industrial Polyethylene educates readers on terminology commonly used in the industry and demystifies the chemistry of catalysts and cocatalysts employed in the manufacture of polyethylene. This concise primer reviews the history of polyethylene and introduces basic features and nomenclatures for this versatile polymer. Catalysts and cocatalysts crucial to the production of polyethylene are discussed in the first few chapters. Latter chapters provide an introduction to the processes used to manufacture polyethylene and discuss matters related to downstream applications of polyethylene such as rheology, additives, environmental issues, etc. Providing industrial chemists and engineers a valuable reference tool that covers fundamental features of polyethylene technology, Introduction to Industrial Polyethylene: Identifies the fundamental types of polyethylene and how they differ. Lists markets, key fabrication methods, and the major producers of polyethylene. Provides biodegradable alternatives to polyethylene. Describes the processes used in the manufacture of polyethylene. Includes a thorough glossary, providing definitions of acronyms and abbreviations and also defines terms commonly used in discussions of production and properties of polyethylene. Concludes with the future of industrial polyethylene.
Citrus pests are a serious issue for crop growers, causing problems in yield and economic losses. This title studies mites harmful to citrus plants from various citrus growing regions around the world. It addresses methods of removal from plants, describes symptoms of damage caused by pests and discusses methods of eradication and control.
This text begins with a review of relevant physiology, instrumentation and the general principles of electrical stimulation. It goes on to examine specific areas of electrotherapy and some more clinical aspects of electrotherapy, and offers two new chapters on magnetic stimulation and TENS. Electrotherapy nomenclature has been updated to reflect the current standards in practice.
In this book, the technical explanation of the nature of analog sound creation is followed by the story of its birth and its subsequent development by various designers, manufacturers and performers. The individual components of analog sound creation are then examined in detail, with step by step examples of sound creation techniques. Then the modern imitative analog instruments are examined, again with detailed instructions for programming and using them, and the book is completed with appendices listing the major instrument lines available, hints on values and purchasing, other sources of information, and a discography of readily available recordings which give good examples of analog sound synthesis. The CD which accompanies the book gives many examples of analog sound creation basics as well as more advanced techniques, and of the abilities of the individual instruments associated with classical and with imitative analog sound synthesis.
The Boys' and Girls' Pliny, written by the renowned author The Elder Pliny, is a unique and engaging introduction to the natural world for young readers. This educational book covers a wide range of topics such as geography, astronomy, animals, and plants, providing a comprehensive understanding of the world in the 1st century AD. The writing style is informative yet accessible, making it an ideal tool for children to learn about the wonders of nature. The book is structured in a question-and-answer format, with each section addressing a different aspect of the natural world, encouraging curiosity and critical thinking in young minds. The Boys' and Girls' Pliny serves as a valuable literary work that sheds light on the intellectual pursuits of ancient Roman society, offering insight into the scientific knowledge of the time. This book is recommended for readers who are interested in classical literature, natural history, and the educational methods of antiquity.
