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  • 1
    Online Resource
    Online Resource
    Bristol :Institute of Physics Publishing,
    Keywords: Electronic books.
    Description / Table of Contents: This book reviews the applications of various spectroscopic techniques and, in particular, electron spin resonance spectroscopy in evaluating the structure and composition of materials and their associated dating layers for archaeological and cultural heritage research. With contributions from an international pool of researchers and case studies to demonstrate the applications of the techniques under discussion.
    Type of Medium: Online Resource
    Pages: 1 online resource (139 pages)
    Edition: 1st ed.
    ISBN: 9780750326162
    Series Statement: IOP Ebooks Series
    Language: English
    Note: Intro -- Preface -- Editor biography -- Ashutosh Kumar Shukla -- Biographies -- Outline placeholder -- Joseph P Hornak -- Shin Toyoda -- Verónica Guilarte -- Prof. Dr Eman Osman -- Liviu C Tugulan -- Mihail Secu -- Vasile Bercu -- Mihalis Cotrubinis -- Octavian G Duliu -- Contributor List -- Chapter 1 Spectrometry as a non-destructive technique in identifying cultural archaeological heritage -- 1.1 Introduction -- 1.2 Analytical techniques in archaeometry -- 1.3 Conservation and restoration testing needs -- 1.4 Non-destructive testing (NDT) classifications -- 1.5 Mobile instrumentation -- 1.6 Non-destructive spectroscopic analytical methods in archaeometry -- 1.6.1 FTIR (Fourier transform-infrared spectroscopy) -- 1.6.2 Raman spectroscopy -- 1.6.3 Ground-penetrating radar (GPR) -- 1.6.4 Electromagnetic radiation in the visible region -- 1.6.5 Ultraviolet light and fluorescence -- 1.6.6 Electron spin resonance (ESR) -- 1.7 Conclusions -- References -- Chapter 2 ESR dating in Archaeology -- Definitions -- 2.1 Introduction -- 2.2 Principles of ESR dating -- 2.2.1 Basic principles -- 2.2.2 ESR age determination -- 2.3 Potential of ESR dating and comparison with other chronometric dating methods -- 2.4 Examples of application of ESR dating in archaeology -- 2.4.1 Tooth enamel -- 2.4.2 Quartz grains and other silicates -- 2.4.3 Speleothems -- 2.4.4 Corals and shells -- 2.4.5 Bones -- 2.5 Future scope and key issues -- References -- Chapter 3 The development of low frequency EPR spectroscopy for studying objects with cultural heritage significance -- 3.1 Background -- 3.2 Theory -- 3.2.1 Electron paramagnetic resonance -- 3.2.2 Ferro/ferrimagnetic materials in LFEPR -- 3.3 Instrumentation -- 3.3.1 RF source and bridge -- 3.3.2 Magnet subsystem -- 3.3.3 Bo modulation subsystem -- 3.3.4 Sample probes -- 3.3.5 MOUSE. , 3.3.6 Spectrometer control and data acquisition -- 3.4 Applications -- 3.4.1 Paintings -- 3.4.2 Ceramics -- 3.4.3 Marble -- 3.5 Future -- Acknowledgements -- List of symbols -- References -- Chapter 4 Determination by ESR of the temperature of prehistoric lithic heat treatment -- 4.1 Introduction -- 4.2 The E1′ center in quartz -- 4.3 Estimation of the heat treatment in the 'recent' past (cases A) -- 4.4 The cases that the samples are old -- 4.4.1 The dose response of the E1′ center in quartz -- 4.4.2 Estimation of the heat treatment of old lithic tools -- 4.5 Sequence to be introduced into dating protocols -- 4.6 Summary -- References -- Chapter 5 Concordant ESR and TL depositional age of Romanian Plane loess -- 5.1 Introduction -- 5.2 Materials and methods -- 5.2.1 Sampling and sample preparation -- 5.2.2 High resolution γ-ray radiometric measurements -- 5.2.3 60Co gamma ray irradiation -- 5.2.4 TL measurements -- 5.2.5 ESR measurements -- 5.3 Results and discussion -- 5.4 Conclusions -- Acknowledgements -- References.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of biological physics 22 (1996), S. 175-185 
    ISSN: 1573-0689
    Keywords: Photosynthesis ; Photosynthetic membranes ; Chloroplasts ; Liposomes ; Spin labels ; EPR spectra ; pH optimum ; Photosynthetic electron transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract The interactions of four nytroxyl spin labels with photosynthetic membranes (thylakoids and liposomes) have been investigated by the Electron Paramagnetic Resonance technique (EPR). The obtained data (shapes of EPR spectra and kinetics of light induced reactions) allow us to localize the interactions between the markers and photosynthetic membranes. The pH influence on the reaction kinetics has also been investigated. On the basis of these experimental data, a theoretical model of the interaction between spin labels and the photosynthetic electron transport chain is proposed.
    Type of Medium: Electronic Resource
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  • 3
    Publication Date: 2024-02-07
    Description: Purpose: The objective of this study was to provide insights into the most recent responses of sediments to climate change and their capability to sequester atmospheric carbon (C). Methods: Three sediment cores were collected, one from the western Black Sea, and two from the southern Adriatic Sea. Cores were extruded and sectioned into 1 cm or 0.5 cm intervals. Sections were frozen, weighed, freeze-dried, and then weighed again to obtain dry weights. Freeze-dried samples were dated by using lead 210 (210Pb) and cesium 137/ americium 241 (137Cs/241Am). Organic and inorganic C were determined by combustion. Particle size distribution was determined using a Beckman Coulter particle size analyzer (LS 13,320; Beckman Coulter Inc.). Mineralogical analyses were carried out by a Philips X’Pert powder diffractometer. Results: Sedimentation and organic and inorganic C accumulation rates increased with time in both the Black Sea and the Adriatic Sea. The increase in accumulation rates continued after the global introduction in the early 1970s of controls on the release of phosphorus (P) into the environment and despite the reduced sediment yield of major rivers (Po and Danube). Therefore, the increased accumulation of organic and inorganic C in the sediments cannot be assigned only to nutrient availability. Instead, we suggest that the increase in organic C is the consequence of the increase in atmospheric C, which has made more carbon dioxide (CO2) available to phytoplankton, thus enabling more efficient photosynthesis. This process known as CO2 fertilization may increase the organic C accumulation in sediments. Simultaneously, the increase of sea temperatures decreases the calcite solubility resulting in increases of the inorganic C accumulation. Conclusion: Our results suggest that long-term, general increases in accumulation rates of organic and inorganic C in sediments are the consequence of increases in atmospheric C. This shows that coastal sediments play an important role in C uptake and thus in regulating the Earth’s climate.
    Type: Article , PeerReviewed
    Format: text
    Format: other
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