Download or read book Natural and Synthetic Waxes written by Ernst Krendlinger and published by John Wiley & Sons. This book was released on 2023-01-10 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural and Synthetic Waxes A compilation of all relevant information for the production and use of waxes in technical applications Waxes are among the oldest organic substances used by mankind. Before all others, beeswax is known to have played a role in human history for thousands of years. But over time, many other wax species have been detected and exploited, and prepared for different utilizations. Today, we possess knowledge of a great variety of different types of waxes. Unfortunately, there still is no broadly accepted definition of a wax: for the relatively few wax chemists, waxes are usually defined by their physico-chemical properties more than by their chemical constitution. Waxes are not uniform but oligomeric and polymeric substances, not simply describable with a chemical formula. The realm of waxes encompasses fully or partly natural, refined, partly or fully synthetic products, which can be extended by “wax-like” products which do not fulfil all definition criteria. Waxes are offered in different forms like pellets, granules, powders, or micropowders. Their number of technical applications runs into thousands. However, waxes in most cases are just adjuvants or additives, and with few exceptions like candles not known to a broader public. Only few publications over the last decades tried to present a more comprehensive overview of heir chemistry, chemical composition, their physical and analytical properties, their applications, and their sometimes astonishing history. Based on personal experience and expertise, the authors intend to present an overview on the main classes of waxes, their origin, history, future, and potential fate. Economical aspects like market size and development, ecological impacts and challenges, and regulatory issues are also addressed. Waxes are indispensable products in everyday life and in industry and technology, though mostly not even visible or distinguishable to experts. They deserve more than the role of a “poor cousin” in chemistry and technology.
Download or read book On the insect white wax of China written by Daniel Hanbury and published by . This book was released on 1853 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insect Hydrocarbons written by Gary J. Blomquist and published by Cambridge University Press. This book was released on 2010-02-04 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique and critical analysis of the wealth of research conducted on the biology, biochemistry and chemical ecology of the rapidly growing field of insect cuticular hydrocarbons. Authored by leading experts in their respective fields, the twenty chapters show the complexity that has been discovered in the nature and role of hydrocarbons in entomology. Covers, in great depth, aspects of chemistry (structures, qualitative and quantitative analysis), biochemistry (biosynthesis, molecular biology, genetics, evolution), physiology, taxonomy, and ecology. Clearly presents to the reader the array of data, ideas, insights and historical disagreements that have been accumulated during the past half century. An emphasis is placed on the role of insect hydrocarbons in chemical communication, especially among the social insects. Includes the first review on the chemical synthesis of insect hydrocarbons. The material presented is a major resource for current researchers and a source of ideas for new researchers.
Download or read book Waxes as insecticides written by Yehiam Ben-Amotz and published by . This book was released on 1933 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Manipulation of the Wax Scales of the Honey Bee written by D. B. Casteel and published by . This book was released on 1912 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pp. 13.
Download or read book The Chemistry and Technology of Waxes written by Albin Henry Warth and published by . This book was released on 1956 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural and Synthetic Waxes written by Ernst J. Krendlinger and published by John Wiley & Sons. This book was released on 2022-10-31 with total page 709 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural and Synthetic Waxes A compilation of all relevant information for the production and use of waxes in technical applications Waxes are among the oldest organic substances used by mankind. Before all others, beeswax is known to have played a role in human history for thousands of years. But over time, many other wax species have been detected and exploited, and prepared for different utilizations. Today, we possess knowledge of a great variety of different types of waxes. Unfortunately, there still is no broadly accepted definition of a wax: for the relatively few wax chemists, waxes are usually defined by their physico-chemical properties more than by their chemical constitution. Waxes are not uniform but oligomeric and polymeric substances, not simply describable with a chemical formula. The realm of waxes encompasses fully or partly natural, refined, partly or fully synthetic products, which can be extended by “wax-like” products which do not fulfil all definition criteria. Waxes are offered in different forms like pellets, granules, powders, or micropowders. Their number of technical applications runs into thousands. However, waxes in most cases are just adjuvants or additives, and with few exceptions like candles not known to a broader public. Only few publications over the last decades tried to present a more comprehensive overview of heir chemistry, chemical composition, their physical and analytical properties, their applications, and their sometimes astonishing history. Based on personal experience and expertise, the authors intend to present an overview on the main classes of waxes, their origin, history, future, and potential fate. Economical aspects like market size and development, ecological impacts and challenges, and regulatory issues are also addressed. Waxes are indispensable products in everyday life and in industry and technology, though mostly not even visible or distinguishable to experts. They deserve more than the role of a “poor cousin” in chemistry and technology.
Download or read book The White Wax Insect of China written by John William Parker and published by . This book was released on 1840 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Pharmacological Study of Chinese Insect Wax written by Robert Laughlin McMurray and published by . This book was released on 1931 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physicochemical Mechanisms for the Removal of Insect Wax by Means of Finely Divided Powders written by Walter Ebeling and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insect Ultrastructure written by H. Akai and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cell biology is moving at breakneck speed, and many of the results from studies on insects have helped in understanding some of the central problems of biology. The time is therefore ripe to provide the scientific community with a series of up-to-date, well illustrated reviews of selected aspects of the sub microscopic cytology of insects. The topics we have included fall into four general groups: seven chapters deal with gametogenesis, four concern develop ing somatic cells, seventeen chapters describe specialized tissues and organs, and three chapters cover cells in pathological states. These accounts are illustrated with over 600 electron micrographs. The more than 1100 pages in the two volumes of Insect Ultrastructure combined labors of 49 dedicated contributors from II countries. represent the These authors have digested and critically summarized a very large body of information, and some measure of this effort can be gained from consulting the bibliographies that close each of the 31 chapters. These contain 2400 publica tions authored by 1500 different scientists. However, before we congratulate ourselves on the advanced state of our knowledge, it is worth remembering that representatives of less than 0.01 % of the known species of insects have been examined with the electron microscope.
Download or read book Chemistry and Biochemistry of Insect Waxes written by R. T. Holman and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wax Craft All about Beeswax written by Thomas William Cowan and published by . This book was released on 1908 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oils Fats Waxes and Resins written by Edward Richards Bolton and published by . This book was released on 1924 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physicochemical Mechanisms for the Removal of Insect Wax by Means of Finely Divided Powders written by Walter Ebeling and published by . This book was released on 1961 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Naturally Bug Free written by Stephanie L. Tourles and published by Storey Publishing. This book was released on 2016-03-08 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protect yourself, your children, your pets, and your home from bugs — without using harsh or toxic chemicals! Herbalist Stephanie Tourles offers 75 simple recipes for safe, effective bug repellents you can make at home from all-natural ingredients. For protection from mosquitos, ticks, and other biting insects, there are sprays, balms, body oils, and tinctures, with scents ranging from eucalyptus to floral, lemon, vanilla, and woodsy spice. There are also recipes for pets, such as herbal shampoo, bedding formulas, and flea-and-tick collars and powders. And Tourles includes repellents for the home, such as sachets that repel moths, carpet powders that repel fleas and ants, and essential oil repellents to keep your pantry pest-free. A detailed ingredient dictionary explains the properties of all the herbs, essential oils, and other key ingredients.
Download or read book The Principles of Insect Physiology written by Vincent B. Wigglesworth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: INSECTS PROVIDE an ideal medium in which to study all the problems of physiology. But if this medium is to be used to the best advantage, the principles and peculiarities of the insect's organization must be first appreciated. It is the purpose of this book to set forth these principles so far as they are understood at the present day. There exist already many excellent text-books of general ento mology; notably those of Imms, Weber, and Snodgrass, to mention only the more recent. But these authors have necessarily been preoccupied chiefly with describing the diversity of form among insects; discussions on function being correspondingly condensed. In the present work the emphasis is reversed. Struc ture is described only to an extent sufficient to make the physiological argument intelligible. Every anatomical peculiarity, every ecological specialization, has indeed its physiological counterpart. In that sense, anatomy, physiology and ecology are not separable. But regarded from the standpoint from which the present work is written, the endless modifications that are met with among insects are but illustrations of the general principles of their physiology, which it is the aim of this book to set forth. Completeness in such a work is not possible, or desirable; but an endeavour has been made to illustrate each physiological characteristic by a few concrete examples, and to include sufficient references to guide the student to the more important sources. The physiology of insects is to some the handmaid of Economic Entomology.
