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  • 1
    Online Resource
    Online Resource
    La Vergne :Royal Society of Chemistry, The,
    Keywords: Technique. ; Electronic books.
    Description / Table of Contents: A collection of bench-top guides providing an up-to-date review of techniques and applications.
    Type of Medium: Online Resource
    Pages: 1 online resource (676 pages)
    Edition: 1st ed.
    ISBN: 9781847550149
    Series Statement: Issn Series
    DDC: 543.089
    Language: English
    Note: Applications Of Solid Phase Microextraction -- Contents -- Glossary -- Calibration and Quantitation by SPME -- Chapter 1 Quantitative Aspects of SPME -- Chapter 2 Quantitation by SPME before Reaching a Partition Equilibrium -- Coatings and Interfaces -- Chapter 3 SPME Coupled to Capillary Electrophoresis -- Chapter 4 Selectivity in SPME -- Chapter 5 Properties of Commercial SPME Coatings -- Chapter 6 Sol-Gel Technology for Thermally Stable Coatings in SPME -- Chapter 7 Solid versus Liquid Coatings -- Physicochemical Applications -- Chapter 8 Application of SPME to Study Sorption Phenomena on Dissolved Humic Organic Matter -- Chapter 9 The Use of SPME to Measure Free Concentrations and Phospholipid/Water and Protein/Water Partition Coefficients -- Chapter 10 Estimation of Hydrophobicity of Organic Compounds -- Environmental Applications -- Chapter 11 Air Sampling with SPME -- Chapter 12 The Application of SPME in Water Analysis -- Chapter 13 The Application of SPME to Pesticide Residue Analysis -- Chapter 14 Inter-laboratory Validation of SPME for the Quantitative Analysis of Aqueous Samples -- Chapter 15 SPME for the Determination of Organochlorine Pesticides in Natural Waters -- Chapter 16 Determination of Sulfur-containing Compounds in Wastewater -- Chapter 17 Analysis of Creosote and Oil in Aqueous Contaminations by SPME -- Chapter 18 Direct Analysis of Solids Using SPME -- Chapter 19 Analysis of Solid Samples by Hot Water Extraction-SPME -- Chapter 20 Field Analysis by SPME -- Chapter 21 Organometallic Speciation by Combining Aqueous Phase Derivatization with SPME-GC-FPD-MS -- Chapter 22 Metal Speciation by SPME-CGC-ICPMS -- Chapter 23 The Application of SPME-LC-MS to the Determination of Contaminants in Complex Environmental Matrices -- Chapter 24 SPME-HPLC of Environmental Pollutants. , Chapter 25 Analysis of Industrial Pollutants in Environmental Samples -- Food, Flavour, Fragrance and Pheromone Applications -- Chapter 26 Analysis of Food and Plant Volatiles -- Chapter 27 Application of SPME to Measure Volatile Metabolites Produced by Staphylococcus carnosus and Staphylococcus xylosus -- Chapter 28 Application of SPME Methods for the Determination of Volatile Wine Aroma Compounds in View of the Varietal Characterization -- Chapter 29 Analysis of Vodkas and White Rums by SPME-GC-MS -- Chapter 30 Analysis of Food Volatiles Using SPME -- Chapter 31 Analysis of Volatile Contaminants in Foods -- Chapter 32 Determination of Pesticides in Foods by Automated SPME-GC-MS -- Chapter 33 SPME in the Study of Chemical Communication in Social Wasps -- Pharmaceutical, Clinical and Forensic Applications -- Chapter 34 Propyl Chloroformate Derivatisation and SPME-GC for Screening of Amines in Urine -- Chapter 35 Isolation of Drugs and Poisons in Biological Fluids by SPME -- Chapter 36 On-fiber Derivatization for Analysis of Steroids by SPME and GC-MS -- Chapter 37 SPME-Quadrupole Ion Trap Mass Spectrometry for the Determination of Drugs of Abuse in Biological Matrices -- Chapter 38 Analysis of Drugs in Biological Fluids Using SPME -- Chapter 39 SPME-Microcolumn LC: Application to Toxicological Drug Analysis -- Chapter 40 Optimization of Drug Analysis by SPME -- Chapter 41 Applications of SPME for the Biomonitoring of Human Exposure to Toxic Substances -- Chapter 42 Applications of SPME in Criminal Investigations -- Chapter 43 SPME-GC-MS Detection Analysis of Maillard Reaction Products -- Chapter 44 SPME Investigation of Intermediates Produced during Biodegradation of Contaminated Materials -- Related Techniques -- Chapter 45 Infrared Spectroscopic Detection for SPME. , Chapter 46 SPME in Near-IR Fiber-optic Evanescent Field Absorption Spectroscopy: A Method for Rapid, Remote In situ Monitoring of Nonpolar Organic Compounds in Water -- Subject Index.
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  • 2
    Online Resource
    Online Resource
    Heidelberg :Heise Medien GmbH & Co. KG,
    Keywords: Artificial intelligence. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (150 pages)
    Edition: 1st ed.
    ISBN: 9783957889867
    DDC: 006.3
    Language: German
    Note: Intro -- Inhaltsverzeichnis -- Vorwort Von Uwe Hannig -- Einleitung des menschlichen Autors -- Automatisch erzeugte Inhalte -- Google, Facebook & -- Co.: Was können und was planen die Big Five? -- 3.1 Google -- 3.2 Facebook, Apple, Microsoft & -- Amazon -- »Automatische Textgenerierung für alle«: -- Roboterjournalismus: Tod oder Zukunft einer Branche? -- 5.1 Wo ist die (künstliche) Intelligenz im automatisierten Journalismus? -- 5.2 Medienhistorische Vorläufer seit 1963 -- 5.3 Was sagen die JournalistInnen, was sagen die LeserInnen? -- 5.4 Die Trends: Personalisiertes Storytelling, Dialogjournalismus, Sensorstorys -- Chatbots und Social Bots: Wie »gute« und »böse« Bots die Kommunikation steuern -- 6.1 Chatbots, intelligente persönliche Assistenten und automatisierte Entscheidungen -- 6.2 Social Bots, Meinungsroboter und automatisierte Accounts -- Automatisierte Kommunikation und die neue Kommunikationswissenschaft -- Content-Automatisierung, Bildungssystem und Arbeitsmarkt-Prognosen -- Ausblick: Die Automatisierung von allem? -- Rechtliche Aspekte automatisch erstellter Inhalte -- Glossar -- Tabellen- und Abbildungsverzeichnis.
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  • 3
    Online Resource
    Online Resource
    La Vergne :Royal Society of Chemistry, The,
    Keywords: Electron paramagnetic resonance. ; Magnetic resonance. ; Electronic books.
    Description / Table of Contents: Reflecting the growing volume of published work in this field, researchers will find this book an invaluable source of information on current methods and applications.
    Type of Medium: Online Resource
    Pages: 1 online resource (347 pages)
    Edition: 1st ed.
    ISBN: 9781847553546
    Series Statement: Issn Series
    DDC: 543.0877
    Language: English
    Note: Electron paramagnetic resonance -- Contents -- Chapter 1 Biological Free Radicals -- 1 Introduction and Scope of Review -- 2 Metal Ions -- 2.1 Iron -- 2.2 Copper -- 2.3 Cobalt -- 2.4 Chromium -- 2.5 Other Metal Ions -- 3 Superoxide and Superoxide Dismutases -- 4 Peroxides -- 5 Ethanol -- 6 Halogenated Compounds -- 7 Thiols -- 8 Phenols and Quinones -- 9 Nitro and Nitroso Compounds -- 10 Amines and Related Species -- 11 Environmental and Atmospheric Pollutants -- 12 Oxidants Generated by Activated White Cells -- 13 Protein-derived Radicals -- 14 Nitric Oxide -- 15 Peroxynitrite -- 16 Photobiology -- 17 Ascorbyl Radical -- 17.1 Biochemical and In vivo Studies -- 17.2 Ex vivo, In vivo and Clinical Studies -- 18 Use of Nitrones as Inhibitors of Radical-mediated Biological Damage -- 18.1 Teratogenesis -- 18.2 Ischemia-Reperfusion Injury -- 18.3 Xenobiotics -- 19 Ischemia-Reperfusion Injury -- 19.1 Brain -- 19.2 Heart -- 19.3 Kidney -- 19.4 Liver -- 20 Assessment of Antioxidant Activity by Spin Trapping -- 21 Recent Developments in Spin Trapping Technology -- References -- Chapter 2 Recent EPR Studies on the Bacterial Photosynthetic Reaction Centre -- 1 Introduction -- 2 The Primary Electron Donor, P -- 2.1 The Electronic Structure of P+, Part I: Hyperfine Couplings -- 2.2 The Electronic Structure of P+, Part II: g-Tensor -- 2.3 The Primary Electron Donor Triplet State -- 3 The Intermediate Electron Acceptor, ΦA -- 4 Quinone Acceptors -- 5 Radical Pairs -- 5.1 The Primary Radical Pair, P+ΦA -- 5.2 The Secondary Radical Pair, P+QA- -- 5.2.1 Radical Pair EPR Spectra -- 5.2.2 Coherence Phenomena -- 6 Concluding Remarks -- Acknowledgements -- References -- Chapter 3 FT-EPR and Pulsed ENDOR Studies of Encapsulated Atoms and Ions -- 1 Introduction -- 2 Noble Gases inside Fullerenes -- 3 Endohedral Metallofullerenes (MF) -- 3.1 Mono-Metallofullerenes. , 3.2 Di- and Multi-Metallofullerenes -- 4 Nitrogen and Phosphorus in Fullerenes -- 5 Clusters in Fullerenes -- 6 Hydrogen in Silasesquioxane Cages -- 7 Outlook -- Acknowledgements -- References -- Chapter 4 EPR Imaging -- 1 Introduction -- 2 EPR Imaging Technique Development -- 2.1 PEDRI and Dynamic Nuclear Polarization (DNP) -- 2.2 Longitudinal Detection -- 2.3 Pulsed EPR Imaging -- 2.4 Force Microscopy -- 2.5 Gradients -- 2.6 Instrumentation for CW Imaging -- 2.7 Spin Probes -- 2.8 Image Reconstruction -- 2.9 Multi-component Spectra -- 2.10 Frequency Dependence of EPR Sensitivity -- 3 Applications -- 3.1 Diffusion -- 3.2 In vivo -- 3.3 Radiation-induced Radicals -- 3.4 Materials Science -- 3.5 Geology -- 4 Summary -- Acknowledgement -- References -- Chapter 5 Pulsed and Time-Resolved EPR Studies of Transient Radicals, Radical Pairs and Excited States in Photochemical Systems -- 1 Introduction -- 2 Radicals -- 2.1 The Mechanism of the Exchange Reaction in Short-lived Radical Pairs -- 2.2 Spin Polarization Mechanisms -- 2.2.1 The Spin-Orbit Coupling Mechanism or the Reversed Triplet Mechanism -- 2.2.2 The Radical Triplet Pair Mechanism -- 2.2.3 Electron Spin Polarization Transfer -- 2.2.4 The Radical Pair Mechanism -- 2.2.5 Anomalous Polarization -- 2.3 Dynamics and Reaction Mechanisms -- 3 Radical Pairs -- 3.1 Introduction -- 3.2 Time-Resolved EPR -- 3.3 Reaction Yield Detected Magnetic Resonance -- 3.3.1 Fluorescence Detected Magnetic Resonance -- 3.3.2 Transient Absorption Detected Magnetic Resonance -- 3.3.3 Photoconductivity Detected Magnetic Resonance -- 3.4 Radical Pairs in Electron Transfer Systems Involving Diad and Triad Structures -- 4 Excited States -- 4.1 Excited Triplet States -- 4.1.1 Triplets in Solution -- 4.1.2 Triplets in Novel Environments -- 4.1.3 New Experimental Methods -- 4.1.4 Triplets in the Solid State. , 4.2 Excited Multiplet States -- 4.2.1 History and Theory -- 4.2.2 The Two Dimensional Nutation Technique -- 4.2.3 Recent Progress -- 5 Concluding Remarks -- Acknowledgements -- References -- Chapter 6 Progress in High Field EPR -- 1 Introduction -- 2 Techniques -- 2.1 High Field Spectrometers -- 2.2 Very High Field EPR -- 2.3 Sensitivity -- 2.4 Quasi-Optics -- 2.5 Magnet Systems -- 2.6 Sources -- 2.7 Detection Systems -- 2.8 Resonator Systems -- 2.8.1 Single-Mode Resonators -- 2.8.2 Fabry-Perot Systems -- 2.8.3 Non-Resonant Bucket Systems -- 2.8.4 Whispering Gallery Mode Resonators -- 2.9 Calibration of g-Factor -- 3 Applications -- 3.1 g-Factor Resolution -- 3.1.1 Radicals in Biological Systems -- 3.1.2 ESEEM and ENDOR -- 3.1.3 Dynamics and Spin Labels -- 3.1.4 Defect and Impurity Centres -- 3.2 Multi-electron Spin Systems -- 3.2.1 Radical Pairs -- 3.2.2 High-spin Metal Complexes -- 3.2.3 Dinuclear Complexes and Clusters -- 3.2.4 High-spin Transition Metal Ions in Biology -- 3.3 Correlated Electron and Other Related Systems -- 4 Conclusions -- References -- Chapter 7 EPR Spin-Labelling and Spin-Probe Studies of Self-assembled Systems -- 1 Introduction -- 2 Ionic Surfactants -- 2.1 Direct Micelles -- 2.1.1 Perfluorinated Surfactants -- 2.2 Reverse Micelles -- 3 Non-ionic Surfactants -- 3.1 Direct Micelles -- 3.2 Reverse Micelles -- 4 Electron Spin Echo Modulation (ESEM) Studies -- 5 Liquid Crystalline Phases -- 6 Self-Assembling Polymers -- 7 Surfactant-Polymer Interactions -- 8 Other EPR Techniques -- References -- Chapter 8 EPR and ENDOR of Metalloproteins -- 1 Introduction -- 2 Copper -- 2.1 'Blue' Copper Sites -- 2.2 Type 2 Copper Sites -- 2.3 Binuclear Sites and Multi-centred Copper Proteins -- 3 Iron -- 3.1 Non-Heme Iron Proteins -- 3.2 Heme Iron Proteins -- 3.3 Iron-Sulfur Proteins -- 4 Nickel -- 5 Molybdenum and Tungsten -- 6 Vanadium. , 7 Manganese -- 8 Conclusions -- Acknowledgements -- References -- Author Index.
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  • 4
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (60 Seiten, 4,72 MB) , Illustrationen, Diagramme
    Language: German
    Note: Förderkennzeichen BMBF 16 EMO 0034. - Verbund-Nummer 01150513 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Mit deutscher Zusammenfassung
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 2127-2129 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A sample cell and low-temperature cooling unit design suitable for x-ray absorption spectroscopy (XAS) of oxygen and/or water sensitive compounds is presented. The cell is a simplified and optimized modification of a previously suggested design. The low-temperature accessory is specifically designed for good thermal isolation and equilibration at liquid nitrogen temperatures, eliminating the need for a more expensive commercial cryostat. The entire construction can be directly attached to an ion chamber and either a standard Lytle detector or energy-discriminating germanium-element solid-state detector via helium gas-purged adaptor flanges. The apparatus was tested at liquid nitrogen temperatures and gave good temperature stability within ±0.1 K. The XAS signal from an air-sensitive potassium/pyrene complex at 100 K taken at the X-6B beam line at the National Synchrotron Light Source facility at Brookhaven National Laboratory is presented. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    350 Main Street , Malden , MA 02148 , USA , and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Journal of cardiovascular electrophysiology 14 (2003), S. 0 
    ISSN: 1540-8167
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Introduction: Catheter ablation has become a well-established therapy for isthmus-dependent right atrial flutter (AFL). Recently, mapping and ablation of AFL have been performed using sophisticated three-dimensional mapping systems, such as electroanatomic and noncontact mapping systems. The LocaLisa system enables nonfluoroscopic navigation of intracardiac electrode catheters based on impedance changes related to catheter movements in transthoracic current fields. The aim of this randomized prospective study was to compare the efficacy of the LocaLisa system with the conventional mapping/ablation approach for radiofrequency ablation of AFL. Methods and Results: Fifty consecutive patients with AFL (39 men and 11 women; age 65 ± 10 years) were studied. The patients were randomly assigned to undergo radiofrequency ablation guided by a conventional fluoroscopy-based approach (24 patients) or by the LocaLisa system (26 patients). Ablation success rate and documentation of bidirectional isthmus block were 100% in both groups. Compared with fluoroscopy-guided approaches, LocaLisa-guided procedures demonstrated a reduction in total fluoroscopy time from 15.9 ± 10.6 minutes to 7.5 ± 6.5 minutes (P 〈 0.005). Total fluoroscopy dosage was reduced from 21.0 ± 19.8 to 8.7 ± 9.5 Gycm2 (P 〈 0.05). Fluoroscopy time required for ablation was significantly shortened in the LocaLisa group (2.6 ± 2.6 min) compared with the conventional approach group (11 ± 10 min, P 〈 0.0005). In 9 (35%) of 26 patients, the ablation could be performed with a fluoroscopy time ≤1 minute. There were no significant differences with regard to the number of radiofrequency applications, fluoroscopy time needed for diagnostic reasons, total procedure time, or other ablation data. Conclusion: Compared with the conventional approach, the LocaLisa system significantly reduces the fluoroscopy times needed for ablation of typical AFL. (J Cardiovasc Electrophysiol, Vol. 14, pp. 587-590, June 2003)
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1540-8167
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Characterization of AF with Noncontact Mapping. Introduction: Information on the spatiotemporal organization of atrial activity at the onset of atrial fibrillation (AF) is limited. Methods and Results: The study consisted of 26 consecutive patients (22 men and 4 women; mean age 56 ± 9 years) with AF in whom the left atrium (LA) was mapped using a noncontact mapping system. At the onset of AF, the AF cycle lengths and wavefronts were analyzed at the site of origin of the triggering atrial premature complex (APC) and five predefined sites within the LA (superior, anterior, posterior, lateral, and septal walls). If repetitive activity was observed at the site of origin of APCs, triggered AF episodes were considered as focally driven. APCs that induced AF had shorter coupling intervals than APCs that did not induce AF (300 ± 41 msec vs 392 ± 64 msec, P 〈 0.001). Immediately after AF onset, repetitive firing was crucial for maintenance of arrhythmia in 52 (80%) of 65 AF episodes. In 13 AF onset episodes (20%), AF was maintained by other mechanisms. The number of LA wavefronts after AF onset was lower in focally driven AF episodes compared with episodes in which no focally driven activity was observed (1.9 ± 0.6 v. 2.3 ± 2.3 wavefronts, P 〈 0.05). After the onset of AF, the posterior wall of the LA showed the earliest disorganized activity (after 5.2 ± 3.1 cycles). Conclusion: In the majority of AF episodes (80%), repetitive firing from the triggering foci may play an important role in maintaining AF immediately after arrhythmia onset. In 20% of the episodes, AF at early stages seems to be maintained by other mechanisms. The capability of APCs to induce AF depends on the coupling interval and the focus localization. The posterior wall of the LA shows the earliest disorganization of wavefronts at the onset of AF. (J Cardiovasc Electrophysiol, Vol. 14, pp. 176-181, February 2003)
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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