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Author: J. Kowallis
Publisher: J. Kowallis
ISBN: 1637959141
Category : Fiction
Languages : en
Pages : 343
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Book Description
Sisters will clash. A staff, a sword. The gates are thrown open. Darkness sweeps through Taran's consciousness. Hellia's deathly apparition stole her sisters. She doesn't know where they are, where to look, or if she'll ever find them. While Taran's powers are growing, so is her fear and anxiety. Answers elude her, and no one understands her terror. Not even Coll. And time is running out. Every second brings them closer and closer to nothing. And closer to the waning end of the hexen race.
Author: J. Kowallis
Publisher: J. Kowallis
ISBN: 1637959141
Category : Fiction
Languages : en
Pages : 343
Get Book Here
Book Description
Sisters will clash. A staff, a sword. The gates are thrown open. Darkness sweeps through Taran's consciousness. Hellia's deathly apparition stole her sisters. She doesn't know where they are, where to look, or if she'll ever find them. While Taran's powers are growing, so is her fear and anxiety. Answers elude her, and no one understands her terror. Not even Coll. And time is running out. Every second brings them closer and closer to nothing. And closer to the waning end of the hexen race.
Author: J. Kowallis
Publisher: J. Kowallis
ISBN: 1646067207
Category : Fiction
Languages : en
Pages : 350
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Book Description
Bryden changed everything. History that once was, is no longer. And life doesn't exist as it once did. Hellia lurks in the shadows between worlds, but the specter of the once-powerful hexen is the least of Taran Grim's worries. Something happened that day in Bryden. Something Taran failed to see. And Coll might be the one paying the price.
Author: Paul Wayne Ayers
Publisher:
ISBN:
Category : Radicals (Chemistry)
Languages : en
Pages : 118
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Book Description
Author: Elena Jiménez
Publisher: Springer
ISBN: 3319129074
Category : Science
Languages : en
Pages : 442
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Book Description
This volume offers a comprehensive overview of advanced research in the field of environmental green chemistry for air, soil and water pollutants, and presents emerging technologies on the chemical treatment of polluted sites and wastes. The 15 chapters, prepared by internationally respected experts, address the following topics: (1) monitoring of indoor and outdoor air pollutants; (2) atmospheric degradation processes and formation mechanisms of secondary pollutants; (3) the environmental assessment and impacts of soils polluted by heavy metals and hydrocarbons; (4) sustainable and emerging technologies for the chemical treatment of organic and animal wastes and wastewaters; (5) photocatalytic CO2 conversion methods for the mitigation of greenhouse effects; and (6) non-conventional methods in green chemistry synthesis. Lastly, the authors outline the future perspectives of each topic. Given its multidisciplinary approach, combining environmental analysis and engineering, the book offers a valuable resource for all researchers and students interested in environmental chemistry and engineering.
Author: Wayne S. Mahoney
Publisher:
ISBN:
Category : Ketones
Languages : en
Pages : 344
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Book Description
Author: Derek J. Chadwick
Publisher: John Wiley & Sons
ISBN: 0470515686
Category : Science
Languages : en
Pages : 290
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Book Description
Insect-Plant Interactions and Induced Plant Defence Chair: John A. Pickett, 1999 This book examines the sophisticated mechanisms that plants use to defend themselves against attack by insects and pathogens, focusing on the networks of plant signalling pathways that underlie these defences. In response to herbivory, plants release a complex blend of as many as 100 volatile chemicals, known as semiochemicals ('sign chemicals'). These act as an airborne SOS signal, revealing the presence of the herbivore to the predators and parasitoids that are its natural enemies. Plants also have endogenous defence mechanisms that can be induced in response to pathogens, and separate chapters deal with systemic acquired resistance, phytoalexins, and the interacting pathways in pathogen and pest resistance. The book discusses underlying biochemical mechanisms by which plant stress leads to the biosynthesis of chemical signals from pools of secondary metabolite precursors, or even from the primary metabolism source. Finally, consideration is given to the possibilities for exploiting these signalling pathways by plant molecular genetics. The use of plant signals and their analogues to switch on defence pathways in crop plants is covered in depth. Bringing together contributions from entomologists, chemical ecologists, molecular biologists and plant physiologists this book is truly interdisciplinary, and will be essential reading for anyone with an interest in agricultural pest control.
Author: Herman Pines
Publisher: Academic Press
ISBN:
Category : Science
Languages : en
Pages : 616
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Book Description
Base-Catalyzed Reactions of Hydrocarbons and Related Compounds focuses on the use of bases as catalysts for the conversion of hydrocarbons and related compounds. In order to emphasize the broad scope of base-catalyzed reactions, examples dealing with the conversion of non-hydrocarbons are given. Comprised of 14 chapters, this book begins with a historical overview of base-catalyzed conversions of hydrocarbons, followed by a discussion on the isomerization of olefins, acetylenes, and allenes, as well as the dimerization and oligomerization of hydrocarbons. The reader is then introduced to a variety of reactions, including those between aromatic hydrocarbons and olefins and between alkylpyridines and alkenylpyridines; homogeneous carbon-carbon addition reactions; and reactions of aprotic solvents with olefins. Subsequent chapters explore carbon-carbon addition of olefins with miscellaneous compounds; addition of ammonia, amines, and anilines to olefinic hydrocarbons; hydrogenation and oxygenation; dehydrogenation, aromatization, and hydrogen transfer; and dehydration of alcohols. This monograph will be of interest to chemists.
Author: Wayne F. Reed
Publisher: John Wiley & Sons
ISBN: 0470917385
Category : Technology & Engineering
Languages : en
Pages : 493
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Book Description
Offers new strategies to optimize polymer reactions With contributions from leading macromolecular scientists and engineers, this book provides a practical guide to polymerization monitoring. It enables laboratory researchers to optimize polymer reactions by providing them with a better understanding of the underlying reaction kinetics and mechanisms. Moreover, it opens the door to improved industrial-scale reactions, including enhanced product quality and reduced harmful emissions. Monitoring Polymerization Reactions begins with a review of the basic elements of polymer reactions and their kinetics, including an overview of stimuli-responsive polymers. Next, it explains why certain polymer and reaction characteristics need to be monitored. The book then explores a variety of practical topics, including: Principles and applications of important polymer characterization tools, such as light scattering, gel permeation chromatography, calorimetry, rheology, and spectroscopy Automatic continuous online monitoring of polymerization (ACOMP) reactions, a flexible platform that enables characterization tools to be employed simultaneously during reactions in order to obtain a complete record of multiple reaction features Modeling of polymerization reactions and numerical approaches Applications that optimize the manufacture of industrially important polymers Throughout the book, the authors provide step-by-step strategies for implementation. In addition, ample use of case studies helps readers understand the benefits of various monitoring strategies and approaches, enabling them to choose the best one to match their needs. As new stimuli-responsive and "intelligent" polymers continue to be developed, the ability to monitor reactions will become increasingly important. With this book as their guide, polymer scientists and engineers can take full advantage of the latest monitoring strategies to optimize reactions in both the lab and the manufacturing plant.
Author:
Publisher:
ISBN:
Category : Patents
Languages : en
Pages : 820
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Book Description
Author: Keith Topping
Publisher: BBC Books
ISBN: 9780563405825
Category : Doctor Who
Languages : en
Pages : 0
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Book Description
"The children of Hexen Bridge are gifted and clever, but insanity and murder follow in their wake. The Doctor has a special interest in the village, but on his return to England in the early twenty-first century, events seem to be escalating out of control. Kidnapped and taken to Liverpool, the Doctor realizes that developments in Hexen Bridge have horrifying repercussions for the rest of the country. Ace is left in the village, where small-minded prejudices and unsettled scores are flaring into violence. As scarecrows fashioned from the bodies of the recent and ancient dead stalk the country lanes around Hexen Bridge, a sinister dark stain is spreading over the surrounding fields. And as the fierce evil grows ever stronger, can the Doctor and Ace prevent it from engulfing the entire world?"--Page 4 of cover.
