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Hypercrosslinked network polymers present a new class of polymeric materials with very wide application possibilities, including adsorption technology, ion exchange, HPLC, analytical chemistry, nanotechnology (nanocomposites), medical polymers - First book describing the theory, practice of preparation and use of polymeric adsorbing materials with the emphasis on new hypercrosslinked polystyrene-type polymers - Written by the originators of the concept of hypercrosslinked polymers - Complex phenomena are explained by appealing to common sense, analogies and well-known effects, rather than complex mathematical treatment and computer modelling - Reviews many Russian, German and even Czech language publications - Contains numerous experimental data in the form of Figures and Tables
Prominent experts from around the world detail the chromatographic and electroseparation techniques they have developed for chiral separations on an analytical scale. Described in step-by-step detail to ensure successful experimental results, the procedures are presented as either general methods or as specific applications to substance classes and special compounds, with emphasis on high performance liquid chromatography and capillary electrophoresis techniques, but also including thin layer chromotographic, gas chromatographic, supercritical fluid chromatographic as well as recent electrochromotographic techniques.
In 1978, Fred Hoyle proposed that interstellar comets carrying several viruses landed on Earth as part of the panspermia hypotheses. With respect to life, the origin of homochirality on Earth has been the greatest mystery because life cannot exist without molecular asymmetry. Many scientists have proposed several possible hypotheses to answer this long-standing L-D question. Previously, Martin Gardner raised the question about mirror symmetry and broken mirror symmetry in terms of the homochirality question in his monographs (1964 and 1990). Possible scenarios for the L-D issue can be categorized into (i) Earth and exoterrestrial origins, (ii) by-chance and necessity mechanisms, and (iii) mirror-symmetrical and non-mirror-symmetrical forces as physical and chemical origins. These scenarios should involve further great amplification mechanisms, enabling a pure L- or D-world.
This book presents a unified outlook on counter-current, ion size exclusion, supercritical fluids, high-performance thin layers, and gas and size exclusion chromatographic techniques used for the separation and purification of organic and inorganic analytes. It also describes a number of green techniques, green sample preparation methods and optimization of solvent consumption in the chromatographic analysis of organic and inorganic analytes. This book offers a valuable resource not only for learners, but also for more experienced chromatographers, conveying a deeper understanding of green chromatographic techniques, green solvents and preparation methods.
Charles W. Gehrke was unflinching. Determined. Persistent. He grew up among the poorest of the poor, yet carried only happy memories of those early years. Out of necessity he learned the value of hard work, as he and his brother helped support their family, even as children—but he never complained and never stopped working until his final days on this earth. He learned the importance of family, also at a tender age. They looked out for each other and stayed close all their lives, and Charles’s own family always came first, even as he rose to the top of his profession, recognized around the world for his pioneering scientific techniques and visionary thinking—modeling and promoting inte...
Polymer science is a technology-driven science. More often than not, technological breakthroughs opened the gates to rapid fundamental and theoretical advances, dramatically broadening the understanding of experimental observations, and expanding the science itself. Some of the breakthroughs involved the creation of new materials. Among these one may enumerate the vulcanization of natural rubber, the derivatization of cellulose, the giant advances right before and during World War II in the preparation and characterization of synthetic elastomers and semi crystalline polymers such as polyesters and polyamides, the subsequent creation of aromatic high-temperature resistant amorphous and semi-...
This book presents the latest advances in the characterization of fatty acids by the various chromatographic methods available, with emphasis on the separation of positional isomers. It focuses on the characterization of positional isomers of substituted, unsaturated, and cyclic fatty acids.
Leading researchers discuss the past and present of chromatography More than one hundred years after Mikhail Tswett pioneered adsorption chromatography, his separation technique has developed into an important branch of scientific study. Providing a full portrait of the discipline, Chromatography: A Science of Discovery bridges the gap between early, twentieth-century chromatography and the cutting edge of today’s research. Featuring contributions from more than fifty award-winning chromatographers, Chromatography offers a multifaceted look at the development and maturation of this field into its current state, as well as its importance across various scientific endeavors. The coverage inc...
A Century of Separation Science presents an extensive overview of the critical developments in separation science since 1900, covering recent advances in chromatography, electrophoresis, field-flow fractionation, countercurrent chromatography, and supercritical fluid chromatography for high-speed and high-throughput analysis.