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Добірка наукової літератури з теми "NQR instrumentation"

Автор: Grafiati

Опубліковано: 12 жовтня 2024

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Статті в журналах з теми "NQR instrumentation"

Brown, R. J. C., A. Christides, M. Gourdji, and L. Guibé. "NQR investigation on ThBr4 and instrumentation." Journal of Molecular Structure 192, no. 3-4 (January 1989): 355–67. http://dx.doi.org/10.1016/0022-2860(89)85055-0.

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Blanz, M., T. J. Rayner, and J. A. S. Smith. "A fast field-cycling NMR/NQR spectrometer." Measurement Science and Technology 4, no. 1 (January 1, 1993): 48–59. http://dx.doi.org/10.1088/0957-0233/4/1/009.

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Osokin, D. Ya, and R. R. Khusnutdinov. "A two-frequency coherent pulse NQR spectrometer." Instruments and Experimental Techniques 52, no. 1 (January 2009): 85–89. http://dx.doi.org/10.1134/s0020441209010138.

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Apih, Tomaž, Veselko Žagar, and Janez Seliger. "NMR and NQR study of polymorphism in carbamazepine." Solid State Nuclear Magnetic Resonance 107 (June 2020): 101653. http://dx.doi.org/10.1016/j.ssnmr.2020.101653.

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Lehmann-Horn, J. A., D. G. Miljak, and T. J. Bastow. "75As, 63Cu NMR and NQR characterization of selected arsenic minerals." Solid State Nuclear Magnetic Resonance 54 (July 2013): 8–12. http://dx.doi.org/10.1016/j.ssnmr.2013.05.001.

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Glickstein, Jarred, and Soumyajit Mandal. "An automated instrument for polarization-enhanced broadband nuclear quadrupole resonance (NQR) spectroscopy." Review of Scientific Instruments 89, no. 9 (September 2018): 093106. http://dx.doi.org/10.1063/1.5041002.

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Rudakov, T. N., V. V. Fedotov, A. V. Belyakov, and V. T. Mikhal’tsevich. "Suppression of transient processes in the oscillatory circuit of the NQR spectrometer." Instruments and Experimental Techniques 43, no. 1 (January 2000): 78–81. http://dx.doi.org/10.1007/bf02759003.

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Rommel, E., D. Pusiol, P. Nickel, and R. Kimmich. "Spectroscopic rotating-frame NQR imaging ( rho NQRI) using surface coils." Measurement Science and Technology 2, no. 9 (September 1, 1991): 866–71. http://dx.doi.org/10.1088/0957-0233/2/9/007.

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Ambrosetti, Roberto, Claudia Forte, and Domenico Ricci. "14N Fourier Transform Nuclear Quadrupole Resonance. Instrumentation: Measurements on Cyanuric Chloride." Zeitschrift für Naturforschung A 47, no. 1-2 (February 1, 1992): 421–29. http://dx.doi.org/10.1515/zna-1992-1-271.

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AbstractA Matec pulsed instrument, already equipped with a laboratory-built data system, has been considerably improved by adding new capabilities, such as versatile pulse sequence programming. Among other things, this allows automated T1 relaxation measurements. The instrument has been employed to record the 14N NQR FT spectrum of cyanuric chloride and measure its T1 relaxation time from 77 K to the melting point at 418 K. The four-line 14N spectrum indicates the presence of two chemically inequivalent sites. The intensity ratio of the lines identifies the site pertaining to a couple of symmetry-related 14N nuclei. The lines smoothly decrease in frequency up to the melting point, where they remain narrow and almost equally spaced. Considering previous results at 4.2 K, this indicates that a single phase is stable over the entire accessible temperature range. The relaxation time T1 decreases smoothly with increasing temperature, with a T-2 law, from nearly 180 s at 77 K to about 1 s near the melting point, where a precipitous decrease starts. The high T1 values found are consistent with the lack of nuclei having high magnetic moment.

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Perić, Berislav, Régis Gautier, Chris J. Pickard, Marko Bosiočić, Mihael S. Grbić, and Miroslav Požek. "Solid-state NMR/NQR and first-principles study of two niobium halide cluster compounds." Solid State Nuclear Magnetic Resonance 59-60 (May 2014): 20–30. http://dx.doi.org/10.1016/j.ssnmr.2014.02.001.

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Дисертації з теми "NQR instrumentation"

Kachkachi, Noreddine. "Spectromètre RQN à base d’un SoC-FPGA : Conception numérique, vérification fonctionnelle et validation expérimentale." Electronic Thesis or Diss., Université de Lorraine, 2024. http://www.theses.fr/2024LORR0053.

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La Résonance quadrupolaire Nucléaire (RQN) est une technique de spectroscopie radio fréquence très utile pour l'identification non invasive et l'analyse de produits chimiques. Cependant cette technique souffre de plusieurs problèmes, notamment de la faible sensibilité et pose beaucoup de défis quand à la conception de l'instrumentation RQN. Afin de relever ces défis techniques et d'améliorer davantage les performances, nous proposons de développer ici, une nouvelle approche qui consiste en la numérisation et l'optimisation de l'architecture électronique en vue d'améliorer la sensibilité. Ainsi, j'ai réalisé dans le cadre de cette thèse, la conception, la vérification fonctionnelle ainsi que la validation expérimentale d'un spectromètre RQN à base d'un SoC-FPGA où l'essentiel de la fonctionnalité matérielle et logicielle est intégré sur une seule puce. Les modules que j'ai conçus et intégrés sur le SoC-FPGA sont: un générateur d'impulsions haute résolution, un module d'acquisition entièrement numérique avec un traitement de signal temps réel et FID stocké sur mémoire externe DDR, un module d'émission numérique entièrement contrôlé et un module de débogage. En plus de la partie logique programmable, j'ai développé et intégré sur le processeur embarqué du SoC-FPGA deux applications Linux pour piloter le spectromètre. La conception de cette architecture, numérique et optimisée, a permis ainsi de se doter d'un nouveau spectromètre de performances et de fonctionnalités remarquables par rapport à l'état de l'art et par rapport aux spectromètres portables commerciaux. La miniaturisation et la numérisation ont permis aussi de réaliser la compacité du système et ainsi d'ouvrir la porte à de nouvelles applications industrielles. En plus, la réalisation de cette nouvelle architecture à base de SoC-FPGA, a apporté une amélioration de la sensibilité grâce à une meilleure immunité aux bruits et à une chaîne d'acquisition entièrement numérique avec un traitement de signal performant. Le spectromètre réalisé a été testé avec succès sur plusieurs échantillons de référence ainsi que sur des échantillons à applications pharmaceutiques tels que le paracétamol et le nitroprussiate de sodium
Nuclear Quadrupolar Resonance (NQR) is a radio frequency spectroscopy technique that is very useful for non-invasive identification and analysis of chemical products. However, it suffers from low sensitivity which makes its instrumentation very challenging. In order to tackle these challenges and enhance the performances, especially sensitivity,we present in this thesis a solution which consists in a SoC-FPGA based compact spectrometer, where all the major digital hardware and software modules are integrated on a single System On Chip, including : a high pulse width resolution pulse programmer, a fully controllable transmitter, an acquisition module with real time digital signal processing, and storage of the acquired signal in an external memory, and a hardware debugger, in addition to embedded Linux applications that drive the spectrometer functionalities. This digital integration and miniaturisation brought noticeable performances of the spectrometers' overall functionality, especially in terms of sensitivity and portability. The designed spectrometer was successfully tested on several representative samples

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Tingle, Jeremy Mark. "NMR imaging : instrumentation and techniques." Thesis, University of Surrey, 1992. http://epubs.surrey.ac.uk/843892/.

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This thesis presents three original contributions to the field of Nuclear Magnetic Resonance (NMR): The experimental framework and analysis for the measurement of a new imaging parameter to describe perfusion; The measurement and analysis of magnetic field inhomogeneity and a practical correction system for their reduction; A novel system for the synchronous control of NMR experiments based on the microprogrammed concept. The thesis begins with an introduction to the theory of NMR. The application of NMR to imaging is also introduced with emphasis on the techniques which developed into those in common use today. Inaccurate determination of the traditional NMR parameters (T1 and T2 and the molecular diffusion coefficient) can be caused by non-diffusive fluid movement within the sample. The experimental basis for determining a new imaging parameter - the Perfusion coefficient - is presented. This provides a measure of forced isotropic fluid motion through an organ or tissue. The instrumentation required for conducting NMR experiments is described in order to introduce the contribution made in this area during this research: A sequence controller. The controller is based on the concept of microprogramming and enables completely synchronous output of 128 bits of data. The software for the generation and storage of control data and the regulation of the data to provide experimental control is microcomputer based. It affords precise and accurate regulation of the magnetic field gradients, the rf synthesizer and the spectrometer for spectroscopic and imaging applications. Fundamental to the science of NMR is the presence of a magnetic field. A detailed study of the analysis of magnetic field inhomogeneity in terms of spherical harmonics is presented. The field of a whole body imaging system with poor inhomogeneity was measured and analyzed to determine and describe the components of the inhomogeneity. Finally a description is given of the design and application of practical methods for reducing the dominant inhomogeneities.

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Thornton, John Stephen. "Instrumentation for low cost, high resolution NMR imaging." Thesis, University of Manchester, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358563.

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Markhasin, Evgeny. "High field DNP and cryogenic MAS NMR : novel instrumentation and applications." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/87469.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, February 2014.
Cataloged from PDF version of thesis. "February 2014."
Includes bibliographical references.
Solid State Nuclear Magnetic Resonance (ssNMR) spectroscopy has blossomed over the last two decades. As ssNMR is progressively applied to more challenging systems, the sensitivity remains one of its major limiting factors. Gyrotron based high-field dynamic nuclear polarization (DNP) permits increasing the sensitivity of ssNMR by 1-2 orders magnitude, significantly extending the reach of ssNMR. Successful application of ssNMR/DNP at 5T and 9.4T stimulated interest to extending this technique to higher fields and new applications. Here, the progress toward this goal is presented. It has involved completion of the world highest field magic angle spinning (MAS) DNP spectrometer and a probe for 16.4T, initial DNP experiments on ¹⁷ O nuclei, variable temperature studies of a model tripeptide, and a systematic analysis of a novel approach to high efficiency RF circuit design. The extension of DNP-NMR to 16.4T has required the development of probe technology, cryogenics, gyrotrons, and microwave transmission lines. A novel DNP probe and cryogenic instrumentation permit extended operation at 85-90K and 10kHz MAS. Initial enhancements [epsilon]=-40 and further optimization of experimental conditions is underway. ¹⁷ O detected DNP-NMR of a water/glycerol glass at 5T enabled an 80-fold enhancement of signal intensities at 82K permitting ¹⁷ O- ¹H distance measurements and heteronuclear correlation experiments. Variable temperature MAS NMR studies of a model tripeptide APG in combination with cryogenic calorimetry and XRD revealed a first-order phase transition and severe attenuation of the cross polarization MAS signal in a wide temperature range due to interference between decoupling and 3-fold hopping of the Ala-CH₃ and Ala-NH₃+ groups. A new, efficient strategy for designing balanced transmission line RF circuits for MAS NMR probes based on back propagation of a common impedance node (BPCIN) is presented. In this approach, the impedance node is the sole means of achieving mutual RF isolation and balance in all channels. BPCIN is illustrated using a custom double resonance MAS probe operating at 11.7T.
by Evgeny Markhasin.
Ph. D.

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Laurent, Guillaume. "Increasing solid-state NMR sensitivity : instrumentation, fast acquisitions and signal processing." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS183.

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La Résonance Magnétique Nucléaire (RMN) en phase solide souffre d’une faible sensibilité, malgré les récentes améliorations. Les approches instrumentales, d’acquisition rapide et de traitement du signal ont été examinées afin de remédier à ce défaut le plus efficacement possible. Premièrement, les microbobines (bobine en rotation à l’angle magique, MACS) ont été placées dans un rotor et couplées inductivement à la bobine de la sonde standard. Un gain en temps de ~ 5 a été obtenu sur des microquantités avec une masse m ~ 100-200 µg. Deuxièmement, le temps d’acquisition a été diminué grâce aux échos Carr-Purcell-Meiboom-Gill (CPMG) pour l’acquisition directe. Nous avons produit un programme Python pour traiter les données soit en utilisant les méthodes standard de peigne ou de superposition, soit avec une méthode de débruitage. Un gain en temps de ~ 3-100 a été possible. Troisièmement, l’échantillonnage non-uniforme (NUS) a été choisi comme un moyen de diminuer le temps d’acquisition des expériences multi-dimensionnelles. L’échantillonnage Poisson s’est avéré le meilleur choix pour limiter les artefacts, tandis que l’échantillonnage hybride s’est révélé efficace sur les spectres présentant à la fois des pics larges et fins. Un gain en temps de ~ 4 a été obtenu. Quatrièmement, les spectres ont été traités avec le débruitage par décomposition en valeurs singulières (SVD). Nous avons mis en avant une surestimation des pics gaussiens de ~ 20 %. Le seuillage automatique a été mis en place, donnant un gain en temps de ~ 2,3. Enfin, le temps de calcul a été étudié et diminué par ~ 100. Une comparaison entre les unités centrales (CPU) et les cartes graphiques (GPU) a été fournie
Solid-state Nuclear Magnetic Resonance (NMR) is suffering from an intrinsic low sensitivity, despite recent improvements. Instrumentation, fast acquisition and signal processing approaches were investigated to circumvent this drawback as far as possible. Firstly, microcoils (Magic Angle Coil Spinning, MACS) were placed into rotors and inductively coupled to the standard probe coil. A time gain of ~ 5 was obtained for microquantities with a mass m ~ 100-200 µg. Secondly, acquisition time was decreased by mean of Carr-Purcell-Meiboom-Gill (CPMG) echoes for direct acquisition. Adequate processing is required to get the best enhancement from this technique. We provided a Python software to process data either using standard spikelets or superposition methods, or with a denoising method. A time gain of ~ 3-100 was possible. Thirdly, Non-Uniform Sampling (NUS) was chosen as a way to decrease acquisition time of indirect dimensions of multi-dimensional experiments. Poisson sampling revealed to be the best choice to limit artefacts, whereas hybrid sampling proved to be efficient on spectra with both broad and narrow peaks. A time gain of ~ 4 was achieved. Fourthly, spectra were processed with Singular Value Decomposition (SVD) denoising. We highlighted an overestimation of Gaussian peaks by ~ 20 %. Automatic thresholding was implemented, giving a time gain of ~ 2.3. Finally, computation time was decreased by ~ 100 by combining ‘divide and conquer’ algorithm, optimised libraries, hardware instruction calls and single precision. A comparison between Central Processing Units (CPU) and Graphical Processing Units (GPU) was provided

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Di, Caro Domenico. "NMR measurements for hazelnuts classification." Doctoral thesis, Universita degli studi di Salerno, 2018. http://hdl.handle.net/10556/3113.

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2016 - 2017
In this work, a method for the quality detection of the in-shell hazelnuts, based on the low field NMR, has been proposed. The aim of the work is to develop an in-line classification system able to detect the hidden defects of the hazelnuts. After an analysis of the hazelnut oil, carried out in order to verify the applicability of the NMR techniques and to determine some configuration parameters, the influence factors that affect these measurements in presence of solid sample instead of liquids have been analyzed. Then, the measurement algorithms were defined. The proposed classification procedure is based on the CPMG sequence and the analysis of the transverse relaxation decay. The procedure includes three different steps in which different features are detected: moisture content, kernel development and mold development. These quality parameters have been evaluated .analyzing the maximum amplitude and the second echo peak of the CPMG signal, and the T2 distribution of the relaxation decay. In order to assure high repeatability and low execution time, special attention has been put in the definition of the data processing. Finally, the realized measurement system has been characterized in terms of classification performance. In this phase, because of the reduced size of the test sample (especially for the hazelnuts with defects) a resampling method, the bootstrap, was used. [edited by Author]
XVI n.s. (XXX ciclo)

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Pagnano, Marco Aurelio de Oliveira. "Automação de um espectrômetro por ressonância magnética nuclear pulsada." Universidade de São Paulo, 1993. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-19082014-101639/.

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Este trabalho consistiu na automação do espectrômetro de Ressonância Magnética Nuclear Pulsada existente no laboratório dos professores José Pedro Donoso e Claudio José Magon. Foram efetuados circuitos adicionais e melhorias no equipamento que eles possuíam, à nível de hardware e software. Foram construídas e programadas interfaces paralelas que ligam o microcomputador a um gerador de pulsos, fabricado pela Tecmag Inc., e a um digitalizador rápido (10 ns) Nicolet 430. O programador de pulsos pode acionar independentemente 75 linhas durante o intervalo de tempo subdividido em 2048 eventos, também independente. O software desenvolvido permite a programação de todas as linhas e eventos de forma eficiente e prática. Foi todo escrito em linguagem C, é modular, portátil, e permite a geração de seqüências de pulsos sofisticadas e também o controle da aquisição e transferência de dados
This work describes the Project developped to automatize the pulsed nuclear magnetic resonance spectrometer housed in the laboratory of the professors José Pedro Donoso e Cláudio José Magon. To satisfy our needs we have improved their old equipment, at the level of hardware and software. Were built and programmed the parallel interface between the microcomputer and a pulse programmer made by Tecmag Inc. and with a fast digitizer (10 ns) Nicolet 430. The pulse programmer can control 75 independent output channels during 2048 time intervals. The software we developped allow us to control the whole pulse sequence on a very efficient and practical way. It was written in C-language, and provides the timing signals necessary to generate sofisticated pulse seqüencies, the data acquisition and data transfer to the host computer

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Bays, Roland. "Instrumentation pour l'étude des propriétés optiques des tissus vivants /." [S.l.] : [s.n.], 1992. http://library.epfl.ch/theses/?display=detail&nr=1086.

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Rolland, Thierry. "Développement d'une instrumentation Doppler ultrasonore : application aux écoulements turbulents en hydraulique /." [S.l.] : [s.n.], 1995. http://library.epfl.ch/theses/?nr=1281.

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Menolfi, Christian Ivo. "Low noise CMOS chopper instrumentation amplifiers for thermoelectric microsensors /." Zürich, 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13583.

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Книги з теми "NQR instrumentation"

R, Thomas Stephen, and Dixon Robert L. 1940-, eds. NMR in medicine: The instrumentation and clinical applications. New York, NY: Published for the American Association of Physicists in Medicine by the American Institute of Physics, 1986.

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G, Gadian David, ed. NMR and its applications to living systems. 2nd ed. Oxford: Oxford University Press, 1995.

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Canet, Daniel, David Lurie, Siegfried Stapf, Hans-Martin Vieth, and Duarte de Mesquita e Sousa. Field-Cycling NMR Relaxometry: Instrumentation, Model Theories and Applications. Royal Society of Chemistry, The, 2018.

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Field-Cycling NMR Relaxometry: Instrumentation, Model Theories and Applications. Royal Society of Chemistry, The, 2018.

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Field-Cycling NMR Relaxometry: Instrumentation, Model Theories and Applications. Royal Society of Chemistry, The, 2018.

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Thomas, Stephen R. Nmr in Medicine: The Instrumentation and Clinical Applications (Medical Physics Monograph, No 14). Amer Inst of Physics, 1986.

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Nanny, Mark A., Roger A. Minear, and Jerry A. Leenheer, eds. Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097511.001.0001.

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This book demonstrates the usefulness of NMR spectroscopy for a wide variety of applications in environmental science and technology. It contains a wealth of information relating to instrumentation, sample preparation, and data interpretation. The book is divided into three sections discussing contaminant interaction, solution and condensed-phase characterization, and nutrients and natural organic matter characterization. In addition to these in-depth chapters, an introductory overview provides the basic principles of solution and solid-state NMR spectroscopy. Each section also contains a discussion of advances in each area directly attributable to NMR spectroscopy. A final chapter suggests future directions for the deployment of this powerful technology in environmental science.

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Dynamic Pulsed-Field-Gradient NMR. Springer, 2014.

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Modern NMR Approaches to the Structure Elucidation of Natural Products : Volume 1: Instrumentation and Software. Royal Society of Chemistry, The, 2015.

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Modern NMR Approaches to the Structure Elucidation of Natural Products : Volume 1: Instrumentation and Software. Royal Society of Chemistry, The, 2015.

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Частини книг з теми "NQR instrumentation"

Mark, Howard. "Traditional NIR Instrumentation." In Handbook of Near-Infrared Analysis, 71–94. 4th ed. Fourth edition. | Boca Raton : Taylor and Francis, 2021. |: CRC Press, 2021. http://dx.doi.org/10.1201/b22513-7.

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Pfeffer, Philip E. "Agricultural/biological applications of NMR." In Research Instrumentation for the 21st Century, 293–331. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2748-3_15.

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Huck, Christian W. "New Trend in Instrumentation of NIR Spectroscopy—Miniaturization." In Near-Infrared Spectroscopy, 193–210. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8648-4_8.

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Becker, Edwin D., and Cherie L. Fisk. "NMR: New techiques for chemical analysis and biological investigation." In Research Instrumentation for the 21st Century, 269–91. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2748-3_14.

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Giri, Arnab, Dilip Sing, Sudarshana Ghosh Dastidar, Pallab Kanti Halder, Nanaocha Sharma, Pulok K. Mukherjee, and Rajib Bandyopadhyay. "Application of NIR Spectroscopy with Chemometrics for Discrimination of Indian Black Pepper Berries." In Smart Sensors Measurement and Instrumentation, 475–82. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6913-3_32.

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Colson, Kimberly L. "Chapter 4. Cryogenically Cooled NMR Probes: a Revolution for NMR Spectroscopy." In Modern NMR Approaches to the Structure Elucidation of Natural Products : Instrumentation and Software, 58–70. Cambridge: Royal Society of Chemistry, 2015. http://dx.doi.org/10.1039/9781849735186-00058.

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Bottomley, Paul A. "Instrumentation and Strategies for in Vivo Human Cardiac Phosphorus NMR Spectroscopy." In Cardiovascular Magnetic Resonance Spectroscopy, 25–43. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3490-7_3.

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Teodorescu, Razvan. "Chapter 2. NMR Magnets: A Historical Overview." In Modern NMR Approaches to the Structure Elucidation of Natural Products : Instrumentation and Software, 26–37. Cambridge: Royal Society of Chemistry, 2015. http://dx.doi.org/10.1039/9781849735186-00026.

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Anklin, Clemens. "Chapter 3. Small-volume NMR: Microprobes and Cryoprobes." In Modern NMR Approaches to the Structure Elucidation of Natural Products : Instrumentation and Software, 38–57. Cambridge: Royal Society of Chemistry, 2015. http://dx.doi.org/10.1039/9781849735186-00038.

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Freeman, Ray, and Eriks Kupce. "Chapter 7. NMR Spectroscopy Using Several Parallel Receivers." In Modern NMR Approaches to the Structure Elucidation of Natural Products : Instrumentation and Software, 119–45. Cambridge: Royal Society of Chemistry, 2015. http://dx.doi.org/10.1039/9781849735186-00119.

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Тези доповідей конференцій з теми "NQR instrumentation"

Garroway, Allen N., Michael L. Buess, James P. Yesinowski, Joel B. Miller, and Ronald A. Krauss. "Explosives detection by nuclear quadrupole resonance (NQR)." In SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, edited by Andre H. Lawrence. SPIE, 1994. http://dx.doi.org/10.1117/12.189164.

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Rizza, Robert, Xue-Cheng Liu, John Thometz, Mohammad Mahinfalah, and Channing Tassone. "The Effect of Instrumentation With Different Mechanical Properties on the Pig Spine During Growth: Finite Element Analysis." In ASME 2007 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2007. http://dx.doi.org/10.1115/sbc2007-174869.

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For the treatment of scoliosis, traditional instrumentations such as Cotrel-Dubousset are very rigid and effect spine growth ([1] & [2]). Recently, spinal fusion-less instrumentation has been clinically introduced. These instrumentations are more spring-like (compliant). Such instrumentations include multiple level staples, vertical expanding prosthesis, and changeable rod system. However, whether the instrumentation is rigid or compliant, the growth of the spine is effected. The actual level of instrument stiffness that affects growth is not known nor well quantified. The goal of this study was to examine the effect of the level of instrumentation stiffness on the simulation of growth of the pig spine by using finite element analysis (FEA).

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Tarle, Gregory, Carl W. Akerlof, Greg Aldering, R. Amanullah, Pierre Astier, E. Barrelet, Christopher Bebek, et al. "SNAP NIR detectors." In Astronomical Telescopes and Instrumentation, edited by John C. Mather. SPIE, 2003. http://dx.doi.org/10.1117/12.461774.

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Ferlet, Marc. "Straylight considerations for NIR spectrographs." In SPIE Astronomical Telescopes + Instrumentation, edited by Ian S. McLean and Mark M. Casali. SPIE, 2008. http://dx.doi.org/10.1117/12.788762.

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Bent, Brinnae, Chia-Han Chiang, Charles Wang, Nandan Lad, Alexander Kent, and Jonathan Viventi. "Simultaneous Recording and Stimulation Instrumentation for Closed Loop Spinal Cord Stimulation." In 2019 9th International IEEE/EMBS Conference on Neural Engineering (NER). IEEE, 2019. http://dx.doi.org/10.1109/ner.2019.8717053.

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Viotto, Valentina, Jacopo Farinato, Davide Greggio, Daniele Vassallo, Elena Carolo, Andrea Baruffolo, Maria Bergomi, et al. "SHARK-NIR system design analysis overview." In SPIE Astronomical Telescopes + Instrumentation, edited by George Z. Angeli and Philippe Dierickx. SPIE, 2016. http://dx.doi.org/10.1117/12.2232757.

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Wilson, John C., Charles P. Henderson, Terry L. Herter, Keith Matthews, Michael F. Skrutskie, Joseph D. Adams, Dae-Sik Moon, et al. "Mass producing an efficient NIR spectrograph." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2004. http://dx.doi.org/10.1117/12.550925.

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Xu, Wenli, and Walter Seifert. "Optical glasses with high NIR transmission." In Astronomical Telescopes and Instrumentation, edited by Eli Atad-Ettedgui and Sandro D'Odorico. SPIE, 2003. http://dx.doi.org/10.1117/12.464255.

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Chappell, Steve, Robin Wang, Sam Hornett, and Alex Spanellis. "A VIS-NIR hyperspectral video imager." In Photonic Instrumentation Engineering XI, edited by Yakov Soskind and Lynda E. Busse. SPIE, 2024. http://dx.doi.org/10.1117/12.3001540.

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Rogers, John, John E. Baldwin, and Donald M. A. Wilson. "Miniature beam combiners for optical and NIR interferometers." In Astronomical Telescopes & Instrumentation, edited by Robert D. Reasenberg. SPIE, 1998. http://dx.doi.org/10.1117/12.317169.

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Звіти організацій з теми "NQR instrumentation"

Rice, David M. DURIP Advanced Polymer Solid State NMR Instrumentation. Fort Belvoir, VA: Defense Technical Information Center, March 1990. http://dx.doi.org/10.21236/ada221401.

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Reo, Nicholas V. Upgrade in NMR Research Instrumentation for the Magnetic Resonance Laboratory. Fort Belvoir, VA: Defense Technical Information Center, August 2003. http://dx.doi.org/10.21236/ada418182.

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Fernando, P. U. Ashvin Iresh, Gilbert Kosgei, Matthew Glasscott, Garrett George, Erik Alberts, and Lee Moores. Boronic acid functionalized ferrocene derivatives towards fluoride sensing. Engineer Research and Development Center (U.S.), July 2022. http://dx.doi.org/10.21079/11681/44762.

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In this technical report (TR), a robust, readily synthesized molecule with a ferrocene core appended with one or two boronic acid moieties was designed, synthesized, and used toward F- (free fluoride) detection. Through Lewis acid-base interactions, the boronic acid derivatives are capable of binding with F- in an aqueous solution via ligand exchange reaction and is specific to fluoride ion. Fluoride binding to ferrocene causes significant changes in fluorescence or electrochemical responses that can be monitored with field-portable instrumentation at concentrations below the WHO recommended limit. The F- binding interaction was further monitored via proton nuclear magnetic resonance spectroscopy (1H-NMR). In addition, fluorescent spectroscopy of the boronic acid moiety and electrochemical monitoring of the ferrocene moiety will allow detection and estimation of F- concentration precisely in a solution matrix. The current work shows lower detection limit (LOD) of ~15 μM (285 μg/L) which is below the WHO standards. Preliminary computational calculations showed the boronic acid moieties attached to the ferrocene core interacted with the fluoride ion. Also, the ionization diagrams indicate the amides and the boronic acid groups can be ionized forming strong ionic interactions with fluoride ions in addition to hydrogen bonding interactions.

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