Download or read book Time resolved Spectroscopic Studies of Chlorine Radicals in Solution written by Leonid Sheps and published by . This book was released on 2005 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time resolved Spectroscopic Studies of Chlorine and Bromine Atom Reactions in Solution written by and published by . This book was released on 2015 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrafast time-resolved pump-probe spectroscopy monitors the dynamics of bimolecular reactions of Cl and Br atoms in solution with sub-picosecond time resolution. A photolysis pulse dissociates a given precursor to generate either Cl or Br atoms, and a UV/VIS or mid-IR probe pulse monitors the evolution of the atom or a reaction product. The hydrogen abstraction reactions of Cl and Br atoms with organic molecules are exoergic and endoergic, respectively. In the case of Br atom reaction, we introduce an additional near-IR pump pulse to promote this endoergic reaction using vibrational excitation. The reactions of Cl atoms with alkanes and alkenes exhibit rate constants that are diffusion-limited (or faster) and are ranked by the number of C=C bonds in the reactants. This suggests that an attractive intermolecular force between the Cl atom and the C=C bond influences the reaction rates. The reactions of Cl atoms with alkenes produce vibrationally excited HCl (v=1). The branching into HCl (v=1) shows a solvent viscosity dependence, owing to a dampening of the vibrational excitation. In contrast, the reaction rates are faster in a more-viscous solvent, implying a failure of simple diffusion theory in describing the reactions of Cl atoms with alkenes. In the reactions of Br atoms, we seek to realize the first vibrationally driven bimolecular reaction. Our most promising prospects are the reactions of Br atoms with CH3OH and DMSO. We observe a difference signal in the decay of the Br-solvent complex when the near-IR pump is resonant with the C-H or O-H overtone stretches of CH3OH and DMSO. This difference signal contains a negative offset at long times, which signifies a loss of the Br-solvent following vibrational excitation. This could be due to vibrational predisocciation of the complex, followed by either geminate recombination to re-form the solvent and the Br precursor or reaction of the Br atoms with vibrationally excited solvent molecules.
Download or read book Time resolved Studies of CN Radical Reactions and the Role of Complexes in Solution written by Andrew C. Crowther and published by . This book was released on 2008 with total page 278 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 2006 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1987 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemistry for the Welfare of Mankind written by T. Tsuruta and published by Elsevier. This book was released on 2013-10-22 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry for the Welfare of Mankind covers the plenary and session lectures presented at the 26th International Congress of Pure and Applied Chemistry, held in Tokyo, Japan on September 4–10, 1977. The book deals with the applications of chemistry, including clinical chemistry, energy resource, toxicity evaluation, and effects of compounds on the environment. The selection first discusses chemistry, macromolecules, and the needs of human; analysis of naturally occurring waters for toxic metals using combined ion exchange-solvent extraction procedures; and pure and applied photochemistry. The book also takes a look at automated analysis in clinical chemistry and behavior of trace chemical constituents in estuarine waters, including early discrete automation, changing challenges for the clinical laboratory, and studies on the Solent estuarine system. The book reviews the presence of lead in the hydrosphere; chemistry, population, and resources; and progress in biomedical materials. The text also focuses on gas phase diffusion and surface reactions in the chemical vapor deposition of silicon, reverse osmosis, liquid crystals and cell membranes, biopolymer synthesis on solid supports, and biological activities of toxic natural products. The selection is a dependable source for readers interested in applied chemistry.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards Catalog written by United States. National Bureau of Standards and published by . This book was released on 1986 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Reaction Mechanisms 1999 written by A. C. Knipe and published by John Wiley & Sons. This book was released on 2004-04-02 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: 35th volume in this highly successful series, Organic Reaction Mechanisms A guide to the most recent developments in organic chemistry Excellent references - Author and subject references Well respected editors with many years experience in the field
Download or read book Time resolved Absorption Studies of Chlorine Dioxide Photochemistry in Solution written by Joshua C. Bolinger and published by . This book was released on 2006 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seventeenth International Conference on Raman Spectroscopy ICORS 2000 written by Shu-Lin Zhang and published by . This book was released on 2000-10-12 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the abridged texts of the Keynote Lecture, the Plenary Lectures, and the two-page extended abstracts of invited oral and poster contributions presented at the Seventeeth International Conference on Raman Spectroscopy held in Beijing, China on August 20?25, 2000. It has become customary to publish the papers presented at this biennial conference in a bound volume. The contributions are grouped into the following sessions: Theoretical Advances in Raman Scattering: Vibrational Analysis/Molecular Dynamics and Structure/Band Shape/Band Intensity Raman Spectroscopy under Extreme Conditions (Pressure, Temperature, High Magnetic Field, etc.) Near-field/Advanced Techniques/Instrumentation and New Applications of Raman Spectroscopy Ultra-fast Phenomena/Time-resolved Raman Spectroscopy Surface Enhanced Scattering Non-linear Effect/CARS/RIKES Brillouin Scattering and Rayleigh Scattering X-rays and UV Raman Spectroscopy Phase Transitions Advanced Materials: Fullerene and Carbon Nanotube/Diamond/Super-hard Materials/Other New and Nanoscale Materials Semiconductors and Related Lower Dimensional Structures/2-D Electronic Gas Superconductors The Solid State: Non-crystalline Materials/Molecular Crystals/Others Surface/Interfacial Phenomena Applications of Raman Spectroscopy in Analytical Chemistry Inorganic/Organo-metallic/Organic Systems Macromolecules and Polymers Thin Films and Membranes Proteins/Peptides/Amino Acids Lipids/Bio-membranes/Nucleic Acids/Viruses Medical/Biomedical/Pharmaceutical Applications/Cells Industrial Process and Environmental Applications Applications in Minerals, Geology and Other Fields The book brings together a wide variety of fields of research in Raman Spectroscopy and as such provides an excellent snapshot of current Raman research activities.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1972-06 with total page 1112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications of the National Bureau of Standards 1986 Catalog written by United States. National Bureau of Standards and published by . This book was released on 1987 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the Chemical Society written by and published by . This book was released on 1984 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical and Physical Behavior of Human Hair written by Clarence R. Robbins and published by Springer Science & Business Media. This book was released on 2012-02-23 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human hair is the subject of a remarkably wide range of scientific investigations. Its chemical and physical properties are of importance to the cosmetics industry, forensic scientists and to biomedical researchers. The fifth edition of this book confirms its position as the definitive monograph on the subject. Previous editions were recognized as “concise and thorough” (Journal of the American Chemical Society), “an invaluable resource” (Canadian Forensic Science Society Journal), and “highly recommended” (Textile Research Journal). Chemical and Physical Behavior of Human Hair is a teaching guide and reference volume for cosmetic chemists and other scientists in the hair products industry, academic researchers studying hair and hair growth, textile scientists and forensic specialists. Features of the Fifth Edition: Recent advances in the classification and characterization of the different proteins and genes in IF and keratin associated proteins in human hair are described. The mechanism and incidence of hair growth and loss and hair density vs. age of males & females are described for Asians, Caucasians and Africans in different scalp regions. Details of hair surface lipids and cuticle membranes provide a better understanding of the surface and organization of the CMC and its involvement in stress strain is presented. Recent evidence demonstrates a more bilateral structure in curly hair and a more concentric arrangement of different cortical proteins in straighter hair. SNPs involved in hair form (curl and coarseness) and pigmentation and genes in alopecia and hair abnormalities are described. The latest biosynthetic scheme for hair pigments and structures for these and the different response of red versus brown-black pigments to photodegradation is described. A new method for curvature on 2,400 persons from different countries and groups is used to assign curvature throughout this book. Additional data for age and effects on diameter, ellipticity, elastic modulus, break stress and other parameters are presented with much larger data sets featuring statistical analyses. Hair conditioning, strength, breakage, split ends, flyaway, shine, combing ease, body, style retention, manageability and feel parameters are defined and described. A new section of different life stages by age groups considering collective and individual changes in hair fiber properties with age and how these affect assembly properties.
Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
