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Tailored to the new AQA Science syllabus, this "GCSE Higher Level Additional Science Workbook" contains loads of great questions to test their knowledge. There's a wide variety of question types, from short-answer questions to graphs and mini-essays, to give the best possible practice. It's great for use throughout the course or for final exam revision. This book is Higher Level, so it contains practice at all the material needed for a top GCSE grade. All AQA Additional Science units are covered in this book - Life Processes, Enzymes and Homeostasis, Genetics, Bonding and Reactions, Rates of Reaction, Using Ions in Solution, Forces and Motion, Electricity and the Atom. (Answer book available separately.)
In one respect, this book is a parallel to Franklin's well-known apologue of the hatter and his sign. It was commenced with a sole view to exhibit the present state of society in the United States, through the agency, in part, of a set of characters with different peculiarities, who had freshly arrived from Europe, and to whom the distinctive features of the country would be apt to present themselves with greater force, than to those who had never lived beyond the influence of the things portrayed. By the original plan, the work was to open at the threshold of the country, or with the arrival of the travellers at Sandy Hook, from which point the tale was to have been carried regularly forward to its conclusion. But a consultation with others has left little more of this plan than the hatter's friends left of his sign. As a vessel was introduced in the first chapter, the cry was for "more ship," until the work has become "all ship;" it actually closing at, or near, the spot where it was originally intended it should commence. Owing to this diversion from the author's design--a design that lay at the bottom of all his projects--a necessity has been created of running the tale through two separate works, or of making a hurried and insufficient conclusion. The former scheme has, consequently, been adopted.
Acetylene systems present a new route to cyclic compounds as an alternative to more traditional methods employed in classical organic chemistry. The synthesis of cyclic structures based on acetylene systems has important applications in the formation of nanostructures, naturally occurring compounds and chemosensory materials for the design of nonlinear optics, electronic and photonic devices.
Alkynes in Cycloadditions presents a modern review of regioselective synthesis of aromatic and non-aromatic carbocyclic and heterocyclic ring systems based primarily on [2+2+2] and [4+2] cycloadditions, and other reactions of acetylenic units including enediynes and enyne-allenes.
Topics covered include:
Alkynes in Cycloadditions presents a comprehensive summary of the literature to 2012 on methods for the synthesis of ring systems from acetylenes for academic researchers working in the fields of organic synthesis, physical organic chemistry, organometallic chemistry, catalysis, materials science, nanomaterials and biochemistry.
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