Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 Classic Reprint written by Charles M. Guttman and published by Forgotten Books. This book was released on 2018-03-28 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Certification of a Polystyrene Synthetic Polymer, Srm 2888 The PS used for this srm was prepared commercially by Polymer Source (dorval, Quebec, Canada). The polymer was specially prepared by anionic polymerization with well - defined styrene and tertiary butyl end groups. From the preparation chemistry, the polymer is expected to be an atactic polystyrene of the form. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Standard Reference Materials written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Certification of a Polystyrene Synthetic Polymer SRM 2888 written by Charles M. Guttman and published by . This book was released on 2003 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 written by Charles M. Guttman and published by Createspace Independent Publishing Platform. This book was released on 2003-11-30 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes certification of the Mw of SRM 2888, a polystyrene (PS), by light scattering. As supplemental numbers, the Mn by NMR end group analysis and the Mw, Mn and the MMD by MALDI-TOF-MS are also given. SRM 2888 was prepared commercially for NIST Polymers Division for use as a standard for Size Exclusion Chromatography and as a narrow distribution polymer standard with well-defined classical molecular mass moments for comparative studies by MALDI-MS. This material was specially prepared and characterized for well-defined end groups. After packaging of this material for future distribution, the Mw was determined by light scattering and Mn determined by solution NMR. End groups were further studied by FTIR and MALDI-TOF-MS. The MMD was studied by MALDI-TOF-MS. The bottle-to-bottle homogeneity of this Standard Reference Material (SRM) was examined by size exclusion chromatography (SEC).
Download or read book Certification of a Polystyrene Synthetic Polymer Srm 2888 written by nist and published by Createspace Independent Publishing Platform. This book was released on 2013-12-12 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The certification of a polystyrene standard reference material, SRM 2888, is described. The Mw of SRM 2888 was determined by light scattering to be 7.19 x 10+3 g/mol with a sample standard deviation of 0.14 x 10+3 g/mol. A combined expanded uncertainty for this light scattering Mw determination, including systematic and random uncertainties, was estimated to be 0.57 x 10+3 g/mol. Mn was determined by NMR analysis of the end groups and found to be 7.05 x 10+3 g/mol with an estimated expanded uncertainty of 0.55 x 10+3 g/mol. Fourier transform infrared spectroscopy (FTIR) and matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS) were used to analyze end groups on the polymer. The polystyrene was analyzed by MALDI-TOF-MS for the number (Mn) and mass (Mw) average of the molecular mass distribution (MMD) as well as the MMD. The bottle-to-bottle variation of the SRM was checked by size exclusion chromatography (SEC) and found to be negligible.This polymer was also used in an interlaboratory comparison of MALDI-TOF-MS of synthetic polymers. The interlaboratory comparison and its results are described. Agreement between the MMD moments obtained by light scattering and NMR and the moments of the MMD obtained by MALDI in the interlaboratory comparison is found to be good overall. However, all the experimental values obtained by MALDITOF- MS fell below the classical values.
Download or read book Handbook of Environmental Engineering Calculations 2nd Ed written by C. C. Lee and published by McGraw Hill Professional. This book was released on 2007-06-08 with total page 1793 pages. Available in PDF, EPUB and Kindle. Book excerpt: Take Advantage of the Latest Calculation Methods for Solving Problems in Every Major Area of Environmental Engineering The only hands-on reference of its kind, the Handbook of Environmental Engineering Calculations equips you with step-by-step calculation procedures covering virtually every aspect of environmental engineering. Designed to give you quick access to essential information, the updated Second Edition of this unique guide now presents the latest methods for solving a wide range of specific problems, together with worked-out examples that include numerical results for the calculations. Written by a team of environmental experts from both the private and public sectors, this easy-to-use reference provides you with complete calculations for water quality assessment and control...solid waste materials ... and air pollution control. Filled with 200 helpful illustrations, the Second Edition features: Hundreds of detailed examples and calculations with fully illustrated steps Calculations covering every aspect of environmental engineering Both SI and U.S. customary units presented throughout New to this edition: new sections on fuel cells and air toxic risk assessment Inside This State-of-the-Art Environmental Engineering Toolkit • Calculations of Water Quality Assessment and Control • Solid Waste Calculations • Air Pollution Control Calculations • Air Toxic Risk Assessment • Fuel Cell Technologies
Download or read book Mass Spectrometry of Polymers written by Giorgio Montaudo and published by CRC Press. This book was released on 2001-10-29 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mass Spectrometry (MS) has rapidly become an indispensable tool in polymer analysis, and modern MS today complements in many ways the structural data provided by Nuclear Magnetic Resonance (NMR) and Infrared (IR) methods. Recent advances have sparked a growing interest in this field and established a need for a summary of progress made and results
Download or read book FLOWMAP MICROFLUIDICS ROADMAP FOR THE LIFE SCIENCES written by JENS. DUCREE and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Table for Four written by K Srilata and published by Penguin UK. This book was released on 2011-07-19 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is their last evening together. Maya, Sandra and Derek, graduate students at UC Santa Cruz and house-mates for three years, are preparing for dinner with Uncle Prithvi, the house-owner. It’s a cheerful and quirky household: Sandra is prone to ‘Orkut attacks’; Derek silently pines for the wistful-looking Afghan boy in the photo on his wall; Maya, who has the hots for Derek, is inexplicably terrified of the ocean; and the elusive Uncle Prithvi communicates through notes he leaves all over the place. Sad at parting, perhaps forever, and half tipsy, Maya, Sandra and Uncle Prithvi play a game of wapping stories as they wait for Derek to arrive. As the evening progresses, we learn their deep, dark secrets and hidden fears. Sandra, abandoned at birth, talks about growing up in an orphanage with her precious twin, disabled Solana, only to be separated by circumstances; Uncle Prithvi rues the loss of his beloved daughter, whom he betrayed when he sought a new life with Karen in the US. Maya, the narrator, can’t bring herself to open up—except when alone. And Derek avoids revealing himself altogether as he doesn’t turn up at all. Finely crafted and deeply felt, Table for Four is a rumination on the burden of secrets, of learning to let go and accepting the betrayals and losses in our lives.
Download or read book Dyspepsia in Clinical Practice written by Marko Duvnjak and published by Springer Science & Business Media. This book was released on 2011-03-08 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although dyspepsia has been investigated for a long period of time, there is no international agreement on what constitutes this condition nor any standardized guidelines. National guidelines followed by practitioners in different countries vary in diagnostic and therapeutic approach, underlining the necessity for a unique definition worldwide. Dyspepsia in Clinical Practice summarizes the current guidelines while offering a unified, practical definition of dyspepsia, and a diagnostic algorithm with an emphasis on the upper gastrointestinal endoscopy and rational first-line therapeutic approach based on epidemiology, pathophysiology, clinical presentation, diagnostic workup and response to previous therapy. Up-to-date scientific information about dyspepsia is presented from a practical, clinician's point of view. Written by experts in the field, this volume addresses dyspepsia in childhood and in the elderly, a very important issue often insufficiently emphasized in the literature. Guidelines are provided that can be easily followed in clinical practice, leading to a reduction in costs and increased patient safety. Dyspepsia in Clinical Practice will be of great value to gastroenterologists, internists, primary care physicians, pediatricians, infectious disease specialists, residents and fellows in training.
Download or read book Nanotube based Devices written by Patrick Bernier and published by . This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Touting the "strong potential of nanotubes for industrial applications" such as electrical leads, rectifiers, transistors, actuators, and cold electron sources, a team of materials scientists from France, South Korea, Germany, and the U.S. present the 33 papers from the April 2003 meeting. The papers have been organized according to the themes of nanotube devices, synthesis, structural and electrical characterization, functionalization and engineering, and composite devices. Annotation : 2004 Book News, Inc., Portland, OR (booknews.com).
Download or read book Harmony Search Algorithm written by Joong Hoon Kim and published by Springer. This book was released on 2015-08-08 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Harmony Search Algorithm (HSA) is one of the most well-known techniques in the field of soft computing, an important paradigm in the science and engineering community. This volume, the proceedings of the 2nd International Conference on Harmony Search Algorithm 2015 (ICHSA 2015), brings together contributions describing the latest developments in the field of soft computing with a special focus on HSA techniques. It includes coverage of new methods that have potentially immense application in various fields. Contributed articles cover aspects of the following topics related to the Harmony Search Algorithm: analytical studies; improved, hybrid and multi-objective variants; parameter tuning; and large-scale applications. The book also contains papers discussing recent advances on the following topics: genetic algorithms; evolutionary strategies; the firefly algorithm and cuckoo search; particle swarm optimization and ant colony optimization; simulated annealing; and local search techniques. This book offers a valuable snapshot of the current status of the Harmony Search Algorithm and related techniques, and will be a useful reference for practising researchers and advanced students in computer science and engineering.
Download or read book Road Maintenance and Rehabilitation written by Organisation for Economic Co-operation and Development and published by . This book was released on 1994 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integration of High Voltage AC DC Grids into Modern Power Systems written by Fazel Mohammadi and published by MDPI. This book was released on 2020-12-10 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric power transmission relies on AC and DC grids. The extensive integration of conventional and nonconventional energy sources and power converters into power grids has resulted in a demand for high voltage (HV), extra-high voltage (EHV), and ultra-high voltage (UHV) AC/DC transmission grids in modern power systems. To ensure the security, adequacy, and reliable operation of power systems, the practical aspects of interconnecting HV, EHV, and UHV AC/DC grids into the electric power systems, along with their economic and environmental impacts, should be considered. The stability analysis for the planning and operation of HV, EHV, and UHV AC/DC grids in power systems is regarded as another key issue in modern power systems. Moreover, interactions between power converters and other power electronics devices (e.g., FACTS devices) installed on the network are other aspects of power systems that must be addressed. This Special Issue aims to investigate the integration of HV, EHV, and UHV AC/DC grids into modern power systems by analyzing their control, operation, protection, dynamics, planning, reliability, and security, along with considering power quality improvement, market operations, power conversion, cybersecurity, supervisory and monitoring, diagnostics, and prognostics systems.
Download or read book Evidence based Laboratory Medicine written by Christopher P. Price and published by Amer. Assoc. for Clinical Chemistry. This book was released on 2003 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Building Maintenance Electrical written by United States. Bureau of Yards and Docks and published by . This book was released on 1964 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Artificial Intelligence Applications to Smart City and Smart Enterprise written by Donato Impedovo and published by MDPI. This book was released on 2020-11-23 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Smart cities operate under more resource-efficient management and economy than ordinary cities. As such, advanced business models have emerged around smart cities, which led to the creation of smart enterprises and organizations that depend on advanced technologies. This book includes 21 selected and peer-reviewed articles contributed in the wide spectrum of artificial intelligence applications to smart cities. Chapters refer to the following areas of interest: vehicular traffic prediction, social big data analysis, smart city management, driving and routing, localization, safety, health, and life quality.
