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PHYSICS (578 journals)                  1 2 3 | Last

Showing 1 - 200 of 741 Journals sorted alphabetically
Acta Acustica united with Acustica     Full-text available via subscription   (Followers: 6)
Acta Mechanica     Hybrid Journal   (Followers: 18)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Advanced Composite Materials     Hybrid Journal   (Followers: 63)
Advanced Functional Materials     Hybrid Journal   (Followers: 48)
Advanced Materials     Hybrid Journal   (Followers: 245)
Advanced Science Focus     Free   (Followers: 3)
Advanced Structural and Chemical Imaging     Open Access   (Followers: 2)
Advances in Condensed Matter Physics     Open Access   (Followers: 8)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Geophysics     Full-text available via subscription   (Followers: 6)
Advances in High Energy Physics     Open Access   (Followers: 21)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 18)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances In Physics     Hybrid Journal   (Followers: 18)
Advances in Physics : X     Open Access  
Advances in Physics Theories and Applications     Open Access   (Followers: 13)
Advances in Remote Sensing     Open Access   (Followers: 35)
AIP Advances     Open Access   (Followers: 9)
AIP Conference Proceedings     Full-text available via subscription   (Followers: 3)
American Journal of Condensed Matter Physics     Open Access   (Followers: 4)
American Journal of Signal Processing     Open Access   (Followers: 10)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4)
Annalen der Physik     Hybrid Journal   (Followers: 5)
Annales Geophysicae (ANGEO)     Open Access   (Followers: 15)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Physica     Open Access  
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5)
Annals of Physics     Hybrid Journal   (Followers: 4)
Annals of West University of Timisoara - Physics     Open Access   (Followers: 1)
Annual Reports on NMR Spectroscopy     Full-text available via subscription   (Followers: 3)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Annual Review of Condensed Matter Physics     Full-text available via subscription  
Annual Review of Materials Research     Full-text available via subscription   (Followers: 5)
APL Materials     Open Access   (Followers: 10)
Applied Composite Materials     Hybrid Journal   (Followers: 45)
Applied Physics A     Hybrid Journal   (Followers: 7)
Applied Physics Frontier     Open Access   (Followers: 1)
Applied Physics Letters     Hybrid Journal   (Followers: 33)
Applied Physics Research     Open Access   (Followers: 4)
Applied Physics Reviews     Hybrid Journal   (Followers: 9)
Applied Radiation and Isotopes     Hybrid Journal   (Followers: 7)
Applied Remote Sensing Journal     Open Access   (Followers: 34)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
Applied Spectroscopy Reviews     Hybrid Journal   (Followers: 5)
Archive for Rational Mechanics and Analysis     Hybrid Journal  
Asia Pacific Physics Newsletter     Hybrid Journal  
ASTRA Proceedings     Open Access   (Followers: 1)
Astronomy & Geophysics     Hybrid Journal   (Followers: 47)
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21)
Astrophysical Journal Supplement Series     Full-text available via subscription   (Followers: 8)
Atoms     Open Access   (Followers: 1)
Attention, Perception & Psychophysics     Full-text available via subscription   (Followers: 10)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Axioms     Open Access  
Bangladesh Journal of Medical Physics     Open Access  
Bauphysik     Hybrid Journal   (Followers: 2)
Berkala Fisika Indonesia     Open Access  
Biomaterials     Hybrid Journal   (Followers: 44)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biophysical Reviews     Hybrid Journal  
Biophysical Reviews and Letters     Hybrid Journal   (Followers: 3)
BMC Biophysics     Open Access   (Followers: 5)
Boson Journal of Modern Physics     Open Access   (Followers: 12)
Brazilian Journal of Physics     Hybrid Journal  
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Materials Science     Open Access   (Followers: 42)
Bulletin of the Atomic Scientists     Hybrid Journal   (Followers: 3)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Russian Academy of Sciences: Physics     Hybrid Journal  
Caderno Brasileiro de Ensino de Física     Open Access  
Canadian Journal of Physics     Full-text available via subscription   (Followers: 14)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 9)
Cells     Open Access   (Followers: 2)
CERN courier. International journal of high energy physics     Free   (Followers: 7)
Chemical Physics of Solid Surfaces     Full-text available via subscription  
Chinese Journal of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 13)
Chinese Journal of Chemical Physics     Hybrid Journal   (Followers: 1)
Chinese Journal of Physics     Hybrid Journal  
Chinese Physics B     Full-text available via subscription  
Chinese Physics C     Full-text available via subscription  
Chinese Physics Letters     Full-text available via subscription  
Cogent Physics     Open Access  
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Colloid Journal     Hybrid Journal   (Followers: 2)
Communications in Mathematical Physics     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Communications in Theoretical Physics     Full-text available via subscription   (Followers: 2)
Complex Analysis and its Synergies     Open Access   (Followers: 2)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 177)
Composites Part B : Engineering     Hybrid Journal   (Followers: 225)
Computational Astrophysics and Cosmology     Open Access  
Computational Condensed Matter     Open Access  
Computational Materials Science     Hybrid Journal   (Followers: 21)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 1)
Computational Particle Mechanics     Hybrid Journal   (Followers: 1)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Physics Communications     Hybrid Journal   (Followers: 6)
Contemporary Concepts of Condensed Matter Science     Full-text available via subscription  
Contemporary Physics     Hybrid Journal   (Followers: 27)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
COSPAR Colloquia Series     Full-text available via subscription   (Followers: 7)
Cryogenics     Hybrid Journal   (Followers: 47)
Current Applied Physics     Full-text available via subscription   (Followers: 4)
Current Science     Open Access   (Followers: 48)
Diagnostic and Interventional Imaging     Full-text available via subscription  
Diamond and Related Materials     Hybrid Journal   (Followers: 11)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamical Properties of Solids     Full-text available via subscription  
ECS Journal of Solid State Science and Technology     Hybrid Journal   (Followers: 4)
Egyptian Journal of Remote Sensing and Space Science     Open Access   (Followers: 20)
EJNMMI Physics     Open Access  
Electrospinning     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 40)
Energy Procedia     Open Access   (Followers: 2)
Engineering Failure Analysis     Hybrid Journal   (Followers: 64)
Engineering Fracture Mechanics     Hybrid Journal   (Followers: 22)
Environmental Fluid Mechanics     Hybrid Journal   (Followers: 5)
EPJ Nonlinear Biomedical Physics     Open Access  
EPJ Quantum Technology     Open Access  
EPJ Techniques and Instrumentation     Full-text available via subscription  
EPJ Web of Conferences     Open Access  
European Journal of Physics     Full-text available via subscription   (Followers: 19)
European Journal of Physics Education     Open Access   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 16)
European Physical Journal C     Hybrid Journal   (Followers: 1)
Europhysics News     Open Access  
Experimental Mechanics     Hybrid Journal   (Followers: 22)
Experimental Methods in the Physical Sciences     Full-text available via subscription  
Experimental Techniques     Hybrid Journal   (Followers: 56)
Exploration Geophysics     Hybrid Journal   (Followers: 4)
Few-Body Systems     Hybrid Journal  
Fire and Materials     Hybrid Journal   (Followers: 5)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Fluctuation and Noise Letters     Hybrid Journal   (Followers: 1)
Fluid Dynamics     Hybrid Journal   (Followers: 13)
Fortschritte der Physik/Progress of Physics     Hybrid Journal  
Frontiers in Physics     Open Access   (Followers: 6)
Frontiers of Materials Science     Hybrid Journal   (Followers: 3)
Frontiers of Physics     Hybrid Journal   (Followers: 2)
Fusion Engineering and Design     Hybrid Journal   (Followers: 10)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 26)
Geografiska Annaler, Series A : Physical Geography     Hybrid Journal   (Followers: 3)
Geophysical Research Letters     Full-text available via subscription   (Followers: 107)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 130)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Global Journal of Physics     Open Access   (Followers: 2)
Granular Matter     Hybrid Journal   (Followers: 1)
Graphs and Combinatorics     Hybrid Journal   (Followers: 6)
Gravitation and Cosmology     Hybrid Journal   (Followers: 3)
Handbook of Geophysical Exploration: Seismic Exploration     Full-text available via subscription  
Handbook of Metal Physics     Full-text available via subscription  
Handbook of Surface Science     Full-text available via subscription   (Followers: 3)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription   (Followers: 1)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 3)
Heat Transfer - Asian Research     Hybrid Journal   (Followers: 11)
High Energy Density Physics     Hybrid Journal   (Followers: 2)
High Pressure Research: An International Journal     Hybrid Journal   (Followers: 3)
IEEE Journal of Quantum Electronics     Hybrid Journal   (Followers: 20)
IEEE Signal Processing Magazine     Full-text available via subscription   (Followers: 62)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
Il Colle di Galileo     Open Access  
Image Analysis & Stereology     Open Access  
Imaging Science Journal     Hybrid Journal   (Followers: 2)
Indian Journal of Biochemistry and Biophysics (IJBB)     Open Access   (Followers: 3)
Indian Journal of Physics     Hybrid Journal   (Followers: 20)
Indian Journal of Pure & Applied Physics (IJPAP)     Open Access   (Followers: 38)
Indian Journal of Radio & Space Physics (IJRSP)     Open Access   (Followers: 35)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Infinite Dimensional Analysis, Quantum Probability and Related Topics     Hybrid Journal  
InfraMatics     Open Access  
Infrared Physics & Technology     Hybrid Journal   (Followers: 11)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 8)
Intermetallics     Hybrid Journal   (Followers: 22)
International Applied Mechanics     Hybrid Journal   (Followers: 3)
International Geophysics     Full-text available via subscription   (Followers: 3)
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 3)
International Journal for Computational Methods in Engineering Science and Mechanics     Hybrid Journal   (Followers: 10)
International Journal for Ion Mobility Spectrometry     Hybrid Journal   (Followers: 1)
International Journal for Simulation and Multidisciplinary Design Optimization     Open Access   (Followers: 3)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Aeroacoustics     Hybrid Journal   (Followers: 31)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 22)
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 6)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Fatigue     Hybrid Journal   (Followers: 33)
International Journal of Fracture     Hybrid Journal   (Followers: 11)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 32)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 17)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)

        1 2 3 | Last

Journal Cover Annual Reports on NMR Spectroscopy
  [SJR: 0.627]   [H-I: 31]   [3 followers]  Follow
   Full-text available via subscription Subscription journal  (Not entitled to full-text)
   ISSN (Print) 0066-4103
   Published by Elsevier Homepage  [3031 journals]
  • MRI Studies of Plastic Crystals
    • Authors: K. Romanenko
      Abstract: Publication date: Available online 9 February 2017
      Source:Annual Reports on NMR Spectroscopy
      Author(s): K. Romanenko
      Over three decades ago, plastic crystals were proposed as a solid-state alternative to conventional liquid electrolytes. Particular attention has been later drawn to organic ionic plastic crystals (OIPCs) and OIPC-based electrolytes. These ionic solids exhibit crucial characteristics of a safe electrolyte material such as nonflammability, nonvolatility, electrochemical stability, and plasticity. Versatility of ionic pairs available to date and ongoing research on molecular design will provide OIPCs for specific operating conditions within a broad range of electrochemical applications. Single-point ramped imaging with T 1 enhancement (SPRITE), an MRI method known for its capability to visualize solids, has played a key role in the discovery of several novel phenomena inherent in OIPCs. This chapter is an overview of these solid-state MRI studies. SPRITE imaging of polycrystalline morphology revealed a striking T 2 * contrast anisotropy and shed light on molecular dynamics in solid phases of plastic crystals. These observations suggest the possibility of macroscopically anisotropic ion conduction supported by impedance spectroscopy and in situ MRI experiments. MRI studies of operating electrochemical cells have led to a breakthrough in understanding the function of doped plastic crystals. The discovered hybrid solid–liquid property of OIPC electrolytes is the key for their successful commercialization.

      PubDate: 2017-02-10T08:20:40Z
      DOI: 10.1016/bs.arnmr.2016.12.002
  • Magnetic Resonance Imaging Studies of the Spatial Distribution of Charge
    • Authors: K. Borzutzki; G. Brunklaus
      Abstract: Publication date: Available online 6 February 2017
      Source:Annual Reports on NMR Spectroscopy
      Author(s): K. Borzutzki, G. Brunklaus
      Charge carriers are an essential component of electrochemical devices or participants in redox processes and govern the achievable properties or performance of the considered materials. Since well-defined structural features of active components including the explicit coordination sphere of charge carriers typically exists at rather locale scale, the application of methods that require long-range order reflecting crystalline lattices such as X-ray diffraction is limited. In this context, magnetic resonance imaging (MRI) constitutes a highly viable option as MRI (or more general NMR) is element selective, hence, charge carrier specific and able to tolerate ill-defined structural arrangements. A skillful combination of available MRI methods allows for monitoring of electrochemical processes with sufficient spatial and temporal resolution, and their recent applications in the field of batteries and other redox chemistry are concisely summarized and discussed in this review.

      PubDate: 2017-02-10T08:20:40Z
      DOI: 10.1016/bs.arnmr.2016.12.003
  • Novel Synthetic As Well As Natural Auxiliaries With a Blend of NMR
           Methodological Developments for Chiral Analysis in Isotropic Media
    • Authors: Sandeep K. Mishra; Sachin R. Chaudhari; A. Lakshmipriya; Indrani Pal; N. Lokesh; N. Suryaprakash
      Abstract: Publication date: Available online 24 January 2017
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Sandeep K. Mishra, Sachin R. Chaudhari, A. Lakshmipriya, Indrani Pal, N. Lokesh, N. Suryaprakash
      Chiral auxiliaries are routinely employed in the NMR spectroscopic discrimination of enantiomers in isotropic solutions. Most of the times the presence of impurities, superposition of peaks, enormous line broadening, and complex multiplicity pattern limit the NMR spectroscopic discrimination of enantiomers and determination of their composition. There are a few approaches to unravel the overlap of peaks. A simple approach is to utilize appropriate chiral auxiliary, which induces a large chemical shift difference between the discriminated peaks (Δδ) R/S , and minimize or unravel the overlap of peaks. In this direction, several new chiral auxiliaries and new chiral differentiation protocols have been introduced, which are both synthetic and naturally occurring molecules. An alternate spectroscopic approach is to design NMR experiments to circumvent inherent problems, viz., enhancing the spectral resolution, separation of the superimposed spectra of enantiomers, and reduction of the spectral complexity. A large number of NMR experiments, such as two-dimensional selective F 1 decoupling, RES-TOCSY, multiple quantum detection, frequency-selective homodecoupling, band-selective homodecoupling, and broadband homodecoupling called as pure shift NMR, to cite a few, are available for such a purpose. Many of these techniques have simplified the chiral analysis for molecules containing diverse functional groups in the presence of suitable chiral auxiliaries. The present chapter summarizes the work carried out in the authors’ laboratory on chiral analysis. This includes the recently introduced new chiral auxiliaries, which are either synthesizable or natural products. They could be either derivatizing agents or solvating agents or the developed three-component protocols, in addition to new NMR experimental methodologies.

      PubDate: 2017-01-29T08:11:07Z
      DOI: 10.1016/bs.arnmr.2016.12.001
  • NMR Relaxation in Dendrimers
    • Authors: D.A. Markelov; M. Dolgushev; E. Lähderanta
      Abstract: Publication date: Available online 9 January 2017
      Source:Annual Reports on NMR Spectroscopy
      Author(s): D.A. Markelov, M. Dolgushev, E. Lähderanta
      This review focuses on recent advances in the theory of local orientational mobility in dendrimers that reveals in the NMR relaxation. In particular, we summarize recent results of analytic theory, computer simulations, and NMR relaxation experiments. The analytic theory provides basic means for the analysis of the simulations and experiments by predicting the existence of two dominating processes: overall branch relaxation and local vibrations. On the other hand, the results of simulations and experiments complete the picture by a third process of rotation of the dendrimer as a whole. The NMR relaxation reveals a fundamental importance of the local constraints on segments’ orientations. Remarkably, the model, in which such constraints are absent, overestimates local vibrations making the NMR relaxation rate functions for segments that have different topological location in the dendrimer to be practically indistinguishable. Inclusion of the bending rigidity fixes this flaw by endorsing the process of overall branch relaxation. This leads to a correct recognition of the slower mobility of the segments that are located closer to the dendrimer's core. The crucial role of the local constraints for the NMR relaxation functions is supported by a series of experiments and simulations.

      PubDate: 2017-01-15T07:52:15Z
      DOI: 10.1016/bs.arnmr.2016.11.001
  • Chapter One Solid-State NMR Studies of Lithium Ion Dynamics Across
           Materials Classes
    • Authors: C. Vinod Chandran; P. Heitjans
      Pages: 1 - 102
      Abstract: Publication date: 2016
      Source:Annual Reports on NMR Spectroscopy, Volume 89
      Author(s): C. Vinod Chandran, P. Heitjans
      Solid-state nuclear magnetic resonance (NMR) spectroscopy is an excellent characterization technique to investigate the local structure and dynamics of materials. This can be exploited to elucidate properties of lithium-containing materials which are systems with very interesting ion dynamics behavior. This review presents a collection of Li solid-state NMR studies on Li dynamics in Li-containing solids reported in the scientific literature. Lithium ion conductors which find use in lithium ion batteries have been given special attention with explanations of their ion dynamic mechanisms, activation barriers, jump rates and dimensionalities of diffusion pathways. The review mainly deals with ion diffusion properties of different classes of solid materials based on their structural and chemical identities. The wide variety of materials discussed include inorganic and organic crystalline and amorphous systems. A short introduction to the NMR methods to determine the diffusion parameters is also provided along with an introduction to the basics in diffusion in solids.

      PubDate: 2016-09-21T15:38:06Z
      DOI: 10.1016/bs.arnmr.2016.03.001
      Issue No: Vol. 89 (2016)
  • Recent MRI and Diffusion Studies of Food Structures
    • Authors: D. Groß; K. Zick; G. Guthausen
      Abstract: Publication date: Available online 31 October 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): D. Groß, K. Zick, G. Guthausen
      Food is an essential class of materials for animal and human beings and deserves closer scientific attention. In the context of magnetic resonance imaging (MRI) and diffusion measured by nuclear magnetic resonance (NMR), mainly structural and compositional aspects can be addressed to study natural food systems with the aim of a deeper and comprehensive description but also to study processes applied to foods and the final products. In this review the currently available and in the context of foods applied MRI and diffusion NMR methods are summarized together with examples of their applications.

      PubDate: 2016-11-03T02:11:49Z
      DOI: 10.1016/bs.arnmr.2016.09.001
  • NMR Studies of Fossilized Wood
    • Authors: M. Bardet; A. Pournou
      Abstract: Publication date: Available online 15 September 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): M. Bardet, A. Pournou
      Fossil wood represents an exceptional and challenging material for nuclear magnetic resonance (NMR) investigation, as it embodies an intriguing multicompound chemistry and a complex and multifarious morphology. This rare plant remain, which managed to escape recycling, can offer through the various NMR applications a valuable contribution to the understanding of the biogeochemistry of wood fossilization. Furthermore, via NMR analysis, key issues of taphonomy, paleoecology, and plants’ evolutionary history can be investigated, providing significant inputs to the science of paleontology. This review commences with the three main forms of fossilized wood, coalified, petrified, and mummified and the respective fossilization mechanisms. Then, it presents various NMR applications and provides some fundamental features of NMR itself such as (a) the appropriate nuclei that can be employed, (b) important aspects of solid-state 13C NMR, (c) differences of 1D and 2D experiments and sequences, (d) the potential of quantitative analysis, (e) advantages of combining NMR with microscopy, and (f) some emerging NMR techniques such as the dynamic nuclear polarization solid-state NMR and the microimaging NMR. The main purpose of this work is to introduce the general principles required for a reliable and reproducible analysis of fossil wood with NMR. Additionally, it aims to present the range of research possibilities arising from NMR investigation and their expected outcomes. Finally, it anticipates that it can be a starting point for further research on fossilized wood and a motivation for developing innovative NMR applications.

      PubDate: 2016-09-21T15:38:06Z
      DOI: 10.1016/bs.arnmr.2016.07.002
  • Quantitative NMR Studies of Multiple Compound Mixtures
    • Abstract: Publication date: Available online 12 September 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): X. Li, K. Hu
      The unique analytical capabilities of both identification and quantification of compounds in complex mixture by NMR technique have been demonstrated. qNMR is widely applied as routine analytical tool for the mixtures because of the universal existence of NMR-active nuclei. qNMR is one of the few standard-free quantification methods. It can quantitatively analyze multiple compound mixtures without requirement of chemical identical standards. In this review, theoretic background and technical keynotes on qNMR data acquisition, spectral processing, and signal deconvolution/integration will be discussed for quantitative analysis of multiple compound mixtures. Sample preparation and the effect of different sample conditions on the assessment of the concentration will also be discussed. 1H 1D qNMR is the most often used method for quantitative analysis of multiple compound mixtures, yet heteronuclear 1D and 2D qNMR approaches have been increasingly recognized and exploited for quantitative assessment or concentration measurement. Some often used quantitative NMR methods are then summarized. Afterwards, applications of qNMR in the areas of metabolomics, natural products, traditional Chinese herbal medicine (TCM), pharmaceutical research and food analysis are exemplified. Finally, we prospect the future developments and applications of qNMR.

      PubDate: 2016-09-21T15:38:06Z
  • The Chemical Bond: The Perspective of NMR Spectroscopy
    • Abstract: Publication date: Available online 1 September 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): M. Dračínský
      This review article deals with chemical bonding from the perspective of nuclear magnetic resonance (NMR) spectroscopy. Different types of chemical bonds are briefly discussed and the relation between chemical bonding and NMR observables is overviewed. The various NMR interactions are classified in terms of through-bond and through-space effects on their observable values. The effects of vibrational motion and nuclear delocalization on NMR parameters and the consequences for the experimental determination of bond distances are also discussed. Finally, NMR experiments in studies of hydrogen bonding are summarized in Section 5.

      PubDate: 2016-09-21T15:38:06Z
  • Orphan Spin Polarization: A Catalyst for High-Throughput Solid-State NMR
           Spectroscopy of Proteins
    • Authors: Gopinath Veglia
      Abstract: Publication date: Available online 7 June 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): T. Gopinath, G. Veglia
      Magic-angle spinning solid-state NMR (MAS ssNMR) spectroscopy is a powerful method for structure determination of biomacromolecules that are recalcitrant to crystallization (membrane proteins and fibrils). Relatively low sensitivity and poor resolution of protein samples require long acquisition times for multidimensional ssNMR experiments. Conventional multidimensional ssNMR pulse sequences acquire one experiment at a time, which is time consuming and often discards orphan (unused) spin operators. Here, we describe our recent progress in the development of multiple acquisition ssNMR methods for protein structure determination. A family of experiments called polarization optimized experiments (POE) was designed, in which we utilized the orphan spin operators that are discarded in classical NMR experiments to recover them and acquire simultaneously multiple 2D and 3D experiments using conventional probes and spectrometers with one receiver. Three strategies namely, DUMAS, MEIOSIS, and MAeSTOSO were used for the concatenation of various 2D and 3D pulse sequences. These methods open up new avenues for reducing the acquisition time of multidimensional experiments for biomolecular ssNMR spectroscopy.

      PubDate: 2016-06-08T19:57:27Z
  • Advances in 27Al MAS NMR Studies of Geopolymers
    • Authors: Jiri Brus; Sabina Abbrent; Libor Kobera; Martina Urbanova; Pavel Cuba
      Pages: 79 - 147
      Abstract: Publication date: Available online 6 January 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Jiri Brus, Sabina Abbrent, Libor Kobera, Martina Urbanova, Pavel Cuba
      Geopolymers have received considerable attention for their low cost, excellent mechanical and physical properties, low energy consumption, and reduced greenhouse emissions during manufacture. A typical application of geopolymers is their replacement of Portland cement as a building material. However, geopolymers have even greater application potential as regenerable catalysts, membranes, and storage materials for toxic chemicals, as well as photoactive composites. The structural characterization of these aluminosilicates, however, continues to be a challenge. Section 1 of the presented work provides a brief history, the typical applications, and conventional as well as advanced routes of synthesis of geopolymers, while discussing the issue of current problems with their structure elucidation. In Section 2, the basic principles of 27Al magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy as a tool for the structural characterization of geopolymers are introduced, while Section 3 summarizes advanced multidimensional and multinuclear techniques of 27Al MAS NMR spectroscopy. Sections 4 and 5 feature recent applications and show future methodological prospects for possible 27Al solid-state NMR approaches to geopolymers.

      PubDate: 2016-01-09T00:03:12Z
      DOI: 10.1016/bs.arnmr.2015.11.001
  • Analytic Theory of Multiple-Quantum NMR of Quadrupolar Nuclei
    • Authors: G. Vinay; R. Ramachandran
      Pages: 123 - 184
      Abstract: Publication date: Available online 16 June 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): G. Vinay, R. Ramachandran
      In this review, an analytic framework based on the concept of effective Floquet Hamiltonians is presented to describe the nuances of multiple-quantum (MQ) NMR of quadrupolar nuclei in static solids. Employing spin I =3/2 as a case study, a pedagogical description of the time evolution of the coherences and populations in MQ experiments is presented through analytic expressions derived from the density operator formalism. From an experimental perspective, the conditions required for optimal implementation of the various stages involved in MQ experiments are identified and explained in terms of effective Floquet Hamiltonians. Additionally, the role of experimental parameters (such as duration of pulse, amplitude of the pulse, etc.,) in the derivation of effective Hamiltonians is discussed in detail. The analytic framework presented in the present study is quite general and is extendable to describe other quadrupolar spins in the periodic table.

      PubDate: 2016-06-18T18:57:15Z
      DOI: 10.1016/bs.arnmr.2016.04.001
  • Applications of NMR Techniques in the Development and Operation of Proton
           Exchange Membrane Fuel Cells
    • Authors: Liuming Yan; Yidong Hu; Xiaoming Zhang; Baohua Yue
      Pages: 149 - 213
      Abstract: Publication date: Available online 4 January 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Liuming Yan, Yidong Hu, Xiaoming Zhang, Baohua Yue
      The application of nuclear magnetic resonance (NMR) techniques, including solution-state NMR, solid-state magic angle spinning NMR, pulsed field gradient NMR, relaxometry, and magnetic resonance imaging in the development of proton exchange membrane fuel cells and direct methanol fuel cells, especially the proton-conducting materials and electrocatalysts, is reviewed.

      PubDate: 2016-01-04T22:31:48Z
      DOI: 10.1016/bs.arnmr.2015.11.003
  • Recent Advances in NMR Studies of Carbohydrates
    • Authors: S. Buda; M. Nawój; J. Mlynarski
      Pages: 185 - 223
      Abstract: Publication date: Available online 7 June 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): S. Buda, M. Nawój, J. Mlynarski
      This chapter summarizes contributions from the last 4 years (2011–15) of the application of nuclear magnetic resonance (NMR) in broadly defined carbohydrate chemistry. Both the experimental NMR methods and the theoretical calculations of NMR parameters used in the studies of carbohydrate chemistry are collected and discussed. The first part of this chapter brings an overview of the experimental technique that is commonly used in carbohydrate chemistry. Next parts present noncovalent interactions between sugar unit and protein (or other molecules). Conformational study of mono-, oligo-, and polysaccharide, mechanistic investigation, and finally molecular modeling and calculation is also reviewed.

      PubDate: 2016-06-08T19:57:27Z
      DOI: 10.1016/bs.arnmr.2016.04.002
  • Recent NMR Studies of Ionic Liquids
    • Authors: Krishnan Damodaran
      Pages: 215 - 244
      Abstract: Publication date: Available online 14 January 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Krishnan Damodaran
      This review presents recent developments in the application of nuclear magnetic resonance (NMR) spectroscopy to study ionic liquids. In addition to routine structural characterization of synthesized ionic liquids, availability of multitude of advanced NMR techniques enables researchers to probe the structure and dynamics of these materials. Also most of the ionic liquids contain a host of NMR-active nuclei that are perfectly suitable for multinuclear NMR experiments. This review focuses on the application of NMR techniques, such as pulsed field gradient, relaxometry, nuclear Overhauser effect, electrophoretic NMR, and other novel experiments designed to investigate pure ionic liquids and the interaction of ionic liquids with various salts and solutes.

      PubDate: 2016-01-18T02:18:20Z
      DOI: 10.1016/bs.arnmr.2015.11.002
  • Recent Solid-State 13C NMR Studies of Liquid Crystals
    • Authors: Kazuhiko Yamada
      Pages: 245 - 305
      Abstract: Publication date: Available online 15 February 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Kazuhiko Yamada
      Solid-state nuclear magnetic resonance (NMR) is very often an invaluable complement to X-ray diffraction methods for the characterization of liquid crystals (LCs). For example, alignment-induced shift (AIS) becomes an important physical quantity for understanding of molecular dynamics of LC molecules when they are aligned to the external magnetic fields. In this review, theoretical aspect AIS is given, and three examples of applications of solid-state 13C NMR to LC systems including the relationship between helical twisting power in cholesteric LCs and the strength of external magnetic fields, determination of n-director direction in a low bend-angle banana LC compound by AIS, and a structural analysis of a classic banana LC using 13C chemical shielding tensor components are described.

      PubDate: 2016-02-16T11:53:21Z
      DOI: 10.1016/bs.arnmr.2016.01.001
  • A Toolbox of Solid-State NMR Experiments for the Characterization of Soft
           Organic Nanomaterials
    • Authors: Lasse Arnt Straasø; Qasim Saleem; Michael Ryan Hansen
      Pages: 307 - 383
      Abstract: Publication date: Available online 2 February 2016
      Source:Annual Reports on NMR Spectroscopy
      Author(s): Lasse Arnt Straasø, Qasim Saleem, Michael Ryan Hansen
      Determining how organic molecules self-assemble into a solid material is a challenging and demanding task if a single crystal of the material cannot be produced. Solid-state NMR spectroscopy offers access to such molecular details via an appropriate selection of techniques. This report gives a selected overview of 1D and 2D solid-state NMR techniques for elucidating the structure of soft organic solids. We focus on how the solid-state NMR techniques are designed from the perspective of the different nuclear interactions, using average Hamiltonian theory and product operators. We also introduce recent methods for quantification and reduction of experimental artifacts. Finally, we highlight how the solid-state NMR techniques can be applied to soft organic materials by reviewing recent applications to semicrystalline polymers, π-conjugated polymers, natural silk, and graphene-related materials.

      PubDate: 2016-02-12T10:43:26Z
      DOI: 10.1016/bs.arnmr.2015.12.001
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