Download or read book Variation of Microviscosity with Temperature in Polymer as Measured by Fluorescence Depolarization written by Huey-Ling Ding and published by . This book was released on 1984 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Isothermal Viscocity Variation in Polymer as Measured by Fluorescence Depolarization written by Been-Jon King Wood and published by . This book was released on 1980 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fluorescence Polarization Anisotropy Measurements of the Temperatures Dependent Dynamics of Polymer Melts and Blends written by Nathan Diachun and published by . This book was released on 1997 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1984 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Sub Tg Annealing on the Properties of Polymers Above and Below Tg written by John J. Aklonis and published by . This book was released on 1985 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the fundamental tenets of all kinetic treatments of the glass transitions is that changes in viscosity occur as glasses age or anneal below the glass transition temperature even under isothermal conditions. To explain these experimental results it is necessary to assume that these changes are large, i.e, orders of magnitude under ordinarily employed experimental conditions. However, since the viscosity of glasses is always so high, (these materials are solids) even such large changes in the viscosity can go undetected. To probe these predicted large viscosity variations, we investigated changes in the effective local or micro viscosity of polymeric glasses doped with fluorescent dye molecules at very low concentrations. We reasoned that changes in viscosity of the glass will influence the local environment of the dye molecules and will be reflected as changes in rotational relaxation times or tumbling rates of the dye. These can be measured by monitoring the polarization of fluorescence emission of the dye molecules. We have investigated changes in fluorescence depolarization associated with thermal aging of several polymer glasses. Our results are much different than what has been observed earlier where the optical experiments were done at room temperature. We have concluded that, in the previous work, macroscopic orientation of the samples was induced via the severe quenching conditions and that the unexpected extremes of time and temperature necessary to erase the influence of sub Tg annealing were, in fact, associated with relaxation of this macroscopic ordering.
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photochemistry and Photophysics written by Jan F. Rabek and published by CRC Press. This book was released on 1991-04-23 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochemistry and Photophysics is a multi-volume set that presents a critical review of new developments that have occurred in the inorganic, organic, atmospheric, environmental, material, bio-and polymer fields of photochemistry and photophysics over the last decade. Specific topics covered in Volume III include photochemical processes at semiconductors, photoluminescence probes of porous solids, photoluminescence probes of polymer structures, and photomodification of cell membranes. Topics covered in Volume IV include magnetic fields in photochemistry, heterogenous photocatalysis by semiconductor powders, hydrophobic and hydrophyllic effects on photochemical and photophysical processes, and photoinitiators for free radical polymerization. The book provides essential information for students and researchers in photochemistry and photophysics.
Download or read book Water Insoluble Drug Formulation written by Ron Liu and published by CRC Press. This book was released on 2018-03-12 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Properties and Formulation: From Theory to Real-World Application Scientists have attributed more than 40 percent of the failures in new drug development to poor biopharmaceutical properties, particularly water insolubility. Issues surrounding water insolubility can postpone or completely derail important new drug development. Even the much-needed reformulation of currently marketed products can be significantly affected by these challenges. More recently it was reported that the percentage increased to 90% for the candidates of new chemical entities in the discovery stage and 75% for compounds under development. In the most comprehensive resource on the topic, this third edition of Water-Insoluble Drug Formulation brings together a distinguished team of experts to provide the scientific background and step-by-step guidance needed to deal with solubility issues in drug development. Twenty-three chapters systematically describe the detailed discussion on solubility theories, solubility prediction models, the aspects of preformulation, biopharmaceutics, pharmacokinetics, regulatory, and discovery support of water-insoluble drugs to various techniques used in developing delivery systems for water-insoluble drugs. This book includes more than 15 water-insoluble drug delivery systems or technologies, illustrated with case studies and featuring oral and parenteral applications. Highlighting the most current information and data available, this seminal volume reflects the significant progress that has been made in nearly all aspects of this field. The aim of this book is to provide a handy reference for pharmaceutical scientists in the handling of formulation issues related to water-insoluble drugs. In addition, this book may be useful to pharmacy and chemistry undergraduate students and pharmaceutical and biopharmaceutical graduate students to enhance their knowledge in the techniques of drug solubilization and dissolution enhancement.
Download or read book Near Infrared Applications in Biotechnology written by Ramesh Raghavachari and published by CRC Press. This book was released on 2020-06-16 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores developments in techniques in diagnostics, DNA sequencing, bioanalysis of immunoassays, and single-molecule detection. It promotes the measurement, identification, monitoring, analysis, and application of near-infrared spectroscopy (NIR) to medical and pharmaceutical advances. The text also considers noninvasive methods of NIR for successful, cost-effective, and prompt diagnoses of diseases.
Download or read book Papers Presented at the Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 2001 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polymer Preprints Japan written by and published by . This book was released on 1994 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SPSJ Annual Meeting written by Kōbunshi Gakkai (Japan) and published by . This book was released on 1994 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photochemistry written by Ian Dunkin and published by . This book was released on 2003-01-22 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: The breadth of scientific and technological interests in the general topic of photochemistry is truly enormous and includes, for example, such diverse areas as microelectronics, atmospheric chemistry, organic synthesis, non-conventional photoimaging, photosynthesis, solar energy conversion, polymer technologies, and spectroscopy. This Specialist Periodical Report on Photochemistry aims to provide an annual review of photo-induced processes that have relevance to the above wide-ranging academic and commercial disciplines, and interests in chemistry, physics, biology and technology. In order to provide easy access to this vast and varied literature, each volume of Photochemistry comprises sections concerned with photophysical processes in condensed phases, organic aspects which are sub-divided by chromophore type, polymer photochemistry, and photochemical aspects of solar energy conversion. Specialist Periodical Reports provide systematic and detailed review coverage in major areas of chemical research. Compiled by teams of leading authorities in the relevant subject areas, the series creates a unique service for the active research chemist, with regular, in-depth accounts of progress in particular fields of chemistry. Subject coverage within different volumes of a given title is similar and publication is on an annual or biennial basis.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symposium on Macromolecules written by and published by . This book was released on 1994 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Meeting written by Kōbunshi Gakkai (Japan) and published by . This book was released on 1994 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:
