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This book reports on origin and history of polycondensation chemistry beginning in the first half of the 19th century. Furthermore, history and inventors of the most important polycondensates, such as Nylons, PET or polycarbonates, are described. The classical theory of step-growth polymerizations is discussed in the light of the latest experimental and theoretical results. Particular emphasis is laid on the role of cyclization reactions. Special categories of polycondensation processes are discussed in more detail: syntheses of hyperbranched and multicyclic polymers, non-stoichiometric polycondensations, interfacial polycondensations, solid state polycondensations, condensative chain polymerizations etc.
This book advocates the importance and value of errors for the progress of scientific research! Hans Kricheldorf explains that most of the great scientific achievements are based on an iterative process (an ‘innate self-healing mechanism’): errors are committed, being checked over and over again, through which finally new findings and knowledge can arise. New ideas are often first confronted with refusal. This is so not only in real life, but also in scientific and medical research. The author outlines in this book how great ideas had to ripen over time before winning recognition and being accepted. The book showcases in an entertaining way, but without schadenfreude, that even some of t...
A relatively compact, but nonetheless comprehensive, review of the most important preparative methods for the synthesis and chemical modification of polymers. The contents are subdivided according to chemical structure of the polymer backbone. Complementary emphasis is on special properties and appl
Why did evolution proceed all the way to man and not stop at an earlier stage? Do we owe our existence to a chain of coincidences over millions of years? Can life be explained from dead matter? And what is life at all? The answers that natural science gives to these fundamental questions cannot satisfy deeper thought. This book shows that in the naturalistic and Darwinian explanation of life and its evolution, a decisive factor is overlooked, namely the human mind. The questions about live and about the direction and meaning of evolution can be answered if the knowing mind is taken into account not as a spectator but as an integral part of reality. In the self-perception of cognition, the forces and laws of organic development can be observed and explored. It becomes apparent that evolution was not a random event, but the organic overall process of the becoming of man.
This book addresses two questions that are highly relevant for epistemology and for society: What is ignorance and how should we rationally deal with it? It proposes a new way of thinking about ignorance based on contemporary and historical philosophical theories. In the first part of the book, the author shows that epistemological definitions of ignorance are quite heterogeneous and often address different phenomena under the label "ignorance." She then develops an integrated conception of ignorance that recognizes doxastic, attitudinal, and structural constituents of ignorance. Based on this new conception, she carves out suggestions for dealing with ignorance from the history of philosoph...
Death in Berlin traces rituals and perceptions surrounding death from the Weimar Republic to the building of the Berlin Wall.
First multi-year cumulation covers six years: 1965-70.