Bøger i Topics in Current Chemistry serien

A series of research papers on computer applications in chemistry, which explores, among other topics, the use of the PEGAS computer program for computer-assisted organic synthesis.

This collection of papers on the latest developments in chemical research includes discussion of the photochemistry of polyhalocompounds, photoinduced electron transfer (PET) employing organic anions, PET reactions in aromatic compounds and fluorescent PET sensors.

T. Douki, J; L. Ravanat, D. Angelov, J.R. Wagner, J. Cadet: Effects of Duplex Stability on Charge-Transfer Efficiency within DNA; B. Giese: Hole Injection and Hole Transfer Through DNA. The Hopping Mechanism; F.D. Lewis, M.R. Wasielewski: Dynamics and Equilibrium for Single Step Hole Transport Processes in Duplex DNA; M.A.

Carbon Rich Compounds are defined here as carbon skeletons with a carbon to hydrogen ratio of 1:(=

Extracellular MRI and X-ray contrast agents are characterized by their phar- cokinetic behaviour.After intravascular injection their plasma-level time curve is characeterized by two phases. 1) are used as non-ionic (neutral) X-ray contrast agents in most cases [1].

This series presents critical reviews of the contemporary position and future trends in modern chemical research.

This book presents critical reviews of the present position and future trends in modern chemical research. The book is still valid and useful after 5 or 10 years. The book will interest scientists and practitioners in the mentioned fields and in industry.

With contributions by numerous experts

bacterial carbohydrate recognition are conveyed, covering Gram-positive as well as Gram-negative bacteria, in Chapter 4 Streptococci and Staphylococci, and in Chapter 5, carbohydrate binding specificities of Helicobacter pylori. In Chapter 6, ¿Bitter sweetness of complexity,¿ the collected reflections on mic- bial adhesion are expanded by a perspective on a broader impact of glycosylation on cellular adhesion, motility and regulatory processes, paralleling the complexity of N-glycan structures on cell surfaces. It highlights particularly how structural details of N-glycans have been causally related to pathological scenarios, with a focus on ?(1,6)-N-acetylglucosaminyltransferase. In the final chapter, biofilm formation is reviewed, covering knowledge about structure and biosynthesis of polysaccharide intercellular adhesins (PIAs) which are central to biofilm formation. This comprehensive chapter explains all PIA-related principles of medical device-associated infections. It is our hope, that this collection of expert articles, ranging from structural ch- istry and structural biology to biochemistry and medicine, will be a stimulation and motivation for our colleagues in the life sciences. At the same time, we hope that these reflections on microbial adhesion will awake interest in and promote und- standing of the complex processes associated with the glycocalyx and the multif- eted interactions between the host cell and its ¿guest,¿ as well as the biological consequences resulting from this mutual interplay.

With contributions by numerous experts

With contributions by numerous experts

R. Steudel, B. Eckert: Solid Sulfur Allotropes.- R. Steudel: Liquid Sulfur.- R. Steudel, Y. Steudel, M.W. Wong: Speciation and Thermodynamics of Sulfur Vapor.- I. Krossing: Homoatomic Sulfur Cations.- R. Steudel: Aqueous Sulfur Sols.- W.E. Kleinjan, A. de Keizer, A. J. H. Janssen: Biologically Produced Sulfur.

With contributions by numerous experts

With contributions by numerous experts

With contributions by numerous experts

This series presents critical reviews of the contemporary position and future trends in modern chemical research.

Despite more than 200 years of sulfur research the chemistry of elemental sulfur and sulfur-rich compounds is still full of "white spots" which have to be filled in with solid knowledge and reliable data.

With contributions by numerous experts

C.N.R. Rao, M.M. Seikh, C. Narayana: Spin-State Transition in LaCoO3 and Related Materials .-H.A. Goodwin: Spin Crossover in Cobalt(II) Systems .-Y. Garcia, P.Gütlich: Thermal Spin Crossover in Mn(II), Mn(III) Cr(II) and Co(III) Coordination Compounds .-D.N. Hendrickson, C.G. Pierpont: Valence Tautomeric Transition Metal Complexes .-P. Guionneau, M. Marchivie, G.Bravic, J.-F. Letard, D. Chasseau: Structural Aspects of Spin Crossover. Example of the [Fe(II)Ln(NCS)2] Complexes .-J. Kusz, P. Gütlich, H. Spiering: Structural Investigations of Tetrazole Complexes of Iron(II) .-A. Hauser: Light-Induced Spin Crossover and the High-Spin Low-Spin Relaxation .-F. Varret, K. Boukheddaden, E. Codjovi, C. Enachescu, J. Linarès: On the Competition Between Relaxation and Photoexcitations in Spin Crossover Solids under Continuous Irradiation .-P. Gütlich: Nuclear Decay Induced Excited Spin State Trapping (NIESST) .-M.-L. Boillot, J. Zarembowitch, A. Sour: Ligand-Driven Light-Induced Spin Change (LD-LISC): A Promising Photomagnetic Effect

With contributions by numerous experts

with contributions by numerous experts

Mass spectrometers are used by almost all chemists and many researchers from neighboring disciplines such as physics,medicine,or biology as a powerful a- lytical tool. Its advantages are high sensitivity,speed,and almost no sample c- sumption. During the last two decades,mass spectrometry experienced a boom of new developments pushing its limits further and further at an increasing speed ¿ just similar to the progress in NMR spectroscopy in the 1970s. However,a mass spectrometer does not only serve as a machine for solving complicated analytical problems,it evolved meanwhile to a complete laboratory for the investigation of molecules,clusters,and other species under the envir- ment-free conditions of the highly diluted gas phase. These special conditions existing only in high vacuum change the properties of the particles under study significantly with respect to their energetics and reaction pathways. For ex- ple,temperature is a macroscopic property of a large ensemble of particles in thermal equilibrium and is thus not defined for a single ion. This fact has severe implications for the measurement of kinetic and thermodynamic data of g- phase species. On the other hand,the examination of gas-phase properties has the advantage that systems reduced to minimum complexity can be studied more easily without the complicated influences of solvents or counterions. In parti- lar, the combination of isotopic labeling and mass spectrometry allows for a detailed analysis of reaction mechanisms or conformational analysis through H/D exchange experiments not only on biomolecules.

with contributions by numerous experts

Considering the high level of our knowledge concerning covalent bond formation in the organic chemistry of molecules, our understanding of the principles involved in organic solid design is almost in its infancy.

With contribution by numerous experts

Orbital mixing rules were developed by Libit and Hoffmann and by Inagaki and Fukui in 1974 and Hirano and Imamura in 1975 to predict magnitudes of orbital amplitudes (Scheme 2) for understanding and designing stereoselective reactions.