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Relevant bibliographies by topics / NMR methods

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Academic literature on the topic 'NMR methods'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "NMR methods"

1

WILSON, ELIZABETH K. "NMR METHODS BLOSSOM." Chemical & Engineering News 76, no. 39 (September 28, 1998): 25–35. http://dx.doi.org/10.1021/cen-v076n039.p025.

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Halkides, Christopher, and Cynthia K. McClure. "12 NMR Spectroscopic methods." Annual Reports Section "B" (Organic Chemistry) 96 (2000): 497–521. http://dx.doi.org/10.1039/b006370n.

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Halkides, Christopher, and R. Thomas Williamson. "14 NMR spectroscopic methods." Annu. Rep. Prog. Chem., Sect. B: Org. Chem. 98 (2002): 639–70. http://dx.doi.org/10.1039/b110384a.

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Albert, Klaus. "Books: Modern NMR methods." Analytical Chemistry 70, no. 13 (July 1998): 472A—473A. http://dx.doi.org/10.1021/ac9818780.

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Norwood, Timothy J. "Multiple-quantum NMR methods." Progress in Nuclear Magnetic Resonance Spectroscopy 24, no. 4 (January 1992): 295–375. http://dx.doi.org/10.1016/0079-6565(92)80005-z.

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Shapiro, Michael J. "ChemInform Abstract: NMR Methods." ChemInform 32, no. 50 (May 23, 2010): no. http://dx.doi.org/10.1002/chin.200150297.

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TAKEUCHI, Y. "ChemInform Abstract: NMR Methods." ChemInform 23, no. 43 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199243312.

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Spiess, H. W. "NMR Methods for Solid Polymers." Annual Review of Materials Science 21, no. 1 (August 1991): 131–58. http://dx.doi.org/10.1146/annurev.ms.21.080191.001023.

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Shapiro, Michael J., and James R. Wareing. "NMR methods in combinatorial chemistry." Current Opinion in Chemical Biology 2, no. 3 (June 1998): 372–75. http://dx.doi.org/10.1016/s1367-5931(98)80011-2.

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Dumoulin, Charles, and Howard Hart. "4714081 Methods for NMR angiography." Magnetic Resonance Imaging 6, no. 4 (July 1988): IX. http://dx.doi.org/10.1016/0730-725x(88)90514-0.

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Dissertations / Theses on the topic "NMR methods"

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Edden, Richard Anthony Edward. "New methods in NMR spectroscopy." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613719.

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McLachlan, Andrew S. "Improved NMR methods for impurity analysis." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503032.

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The results presented in this thesis are concerned with improvements to liquid-state Nuclear Magnetic Resonance (NMR) spectroscopic techniques and their application to small molecule (i.e. with molecular weight < 500) mixture systems, with the aim of separating signals from individual components. The results presented in this thesis provide an insight into NMR mixture analysis, which may ultimately have applications in the field of drug discovery and development.

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Hernandez, Cid Aaron. "New NMR methods for mixture analysis." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/new-nmr-methods-for-mixture-analysis(8ee7b062-e1cf-4c31-9a4b-3e6603b2d29c).html.

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This thesis is focussed on the investigation of matrices for matrix-assisted diffusion-ordered spectroscopy (MAD). Diffusion-ordered spectroscopy (DOSY) is a family of experiments where the resonances in the chemical shift dimension are further dispersed in an extra dimension according to diffusion coefficient. A typical DOSY spectrum shows one single diffusion coefficient for all the resonances coming from one single species. However, If two or more resonances overlap, the diffusion resolution of the DOSY spectrum is compromised and a spurious diffusion coefficient results, intermediate between the species. In case of signal overlap, the use of more advanced processing methods aids to separate two analytes that differ by at least 30% in diffusion coefficient. In practice, many mixtures contain species of similar diffusion coefficients whose resonances overlap in the chemical shift dimension. The addition of co-solutes can modify the chemical environment (matrix), with which different analytes interact to different extents, and enhance the diffusion resolution of DOSY. However, the addition of co-solutes can risk the benefits of DOSY by increasing the probability of signal overlap. Signal overlap in MAD is avoided by using a 1H NMR-invisible surfactant such as sodium perfluorooctanoate (NaPFO), which has replaced each proton by a fluorine atom. PFO micelles are a tunable matrix which allows the separation of analytes via coulombic interactions by adjusting the pH. Differences in diffusion coefficient in NaPFO solution can be analysed using a modified Lindman's law to model the diffusion coefficient as a function of pH. The model rationalises the binding constants of analytes to PFO micelles with good accuracy, subject to the spectral data quality. Another alternative to resolve diffusion coefficients using the invisible MAD approach is by means of a commercially available alkyl surfactant like cetyltrimethylammonium bromide (CTAB). CTAB in high ionic strength solution forms worm-like micelles whose resonances can be filtered out from the final DOSY spectrum. CTAB worm-like micelles have short transverse relaxation times compared to all of the analytes in the mixture. If a transverse relaxation filter is positioned at the beginning of a standard DOSY pulse sequence, as in PROJECT-Oneshot, the strong CTAB signals vanish and leave behind only the analyte resonances and hence avoid signal overlap. Finally, the use of bovine serum albumin (BSA) as a potential invisible matrix, using a similar approach to CTAB worm-like micelles is investigated, using a relaxation-weighted DOSY pulse sequence to suppress most of the BSA background signal (at a cost in analyte signal to noise ratio). An alternative to suppress most of the BSA background and preserve most of the analyte signal is by means of mild transverse relaxation filtration and spectral editing to obtain an edited DOSY spectrum that shows only the analyte signals. Nonetheless, it is a shame that useful MAD results can only be obtained under a narrow set of conditions: i) different mole ratios BSA: analyte to aid diffusion resolution, ii) mild T2 filtration to improve analyte signal to noise ratio and iii) spectral editing to remove residual BSA background.

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Hallberg, Fredrik, Erik Pettersson, Sergey Dvinskikh, Thomas Vernersson, Göran Lindberg, István Furó, and Peter Stilbs. "Electrophoretic NMR (eNMR) – methods and applications." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193097.

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Hallberg, Fredrik, Erik Pettersson, Sergey Dvinskikh, Thomas Vernersson, Göran Lindberg, István Furó, and Peter Stilbs. "Electrophoretic NMR (eNMR) – methods and applications." Diffusion fundamentals 7 (2007) 13, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14170.

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Bennett, David Alexander. "Structural methods in solid-state NMR." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13242/.

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New solid-state NMR experiments for measuring internuclear distances are designed using symmetry principles. The “recoupling” sequences described here are intended to reintroduce the MAS-averaged heteronuclear dipole-dipole coupling between a spin-1/2 nucleus (e.g. 1H) and a half-integer quadrupolar nucleus (e.g. 17O, I = 5/2). The magnitude of the dipolar interaction depends on the separation between the coupled nuclei, so the evolution of the spin system under the recoupled Hamiltonian can be used to measure the internuclear distance. Simulations of the spin dynamics are used initially to select candidate sequences and these are subsequently employed to measure both long-range and direct O–H distances in powdered L-Tyrosine.HCl (isotopically enriched with 17O at 20%to 30% at the O$^\eta$ site). Improvements to existing methods for the data analysis for this type of NMR experiment are also discussed, including the restriction and/or removal of certain fit parameters and the explicit inclusion of inhomogeneous radio-frequency fields as part of the fitting procedure. The effects of processing on the uncertainty of experimentally determined distances are considered, and a new analysis method which circumvents several of these effects is presented. Similar recoupling sequences can be used to measure the anisotropy of proton chemical shifts, and some preliminary results are also presented for this application. A systematic method for the assignment of congested spin-1/2 spectra resulting from molecules with large numbers of chemically similar sites is also described. This makes use of a comparison between the chemical shift tensor measured as usual by the 2D-PASS experiment and its principal components calculated from first principles using the density functional theory package CASTEP. The initial peak assignment is generated randomly and then varied using a steepest-ascent hill climbing algorithm with the square sum of the difference between the experimental and calculated principal values of the chemical shift tensor as the target function. The new method is tested on the 13C spectrum of the anti-inflammatory drug flufenamic acid and found to be superior to simple assignments using only the isotropic chemical shift.

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Swan, Iain. "Advanced NMR methods for formulation analysis." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/advanced-nmr-methods-for-formulation-analysis(42a72ebf-b797-403f-a3bc-353e0e3987eb).html.

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This thesis concentrates on diffusion-ordered spectroscopy (DOSY): a technique in liquid state nuclear magnetic resonance (NMR) spectroscopy that is able to distinguish different chemical species by their size in solution, and measure species’ diffusion coefficients. DOSY is an invaluable tool to analyse and resolve the signals of mixtures of chemicals in solution. DOSY measures an ensemble of nuclei in a mixture, using pulsed field gradients (PFGs) to encode, and later decode, the positions of spins. This provides information on the root mean square distance that spins diffuse during a delay between a pair of PFGs, which allows the determination of diffusion coefficients. However, DOSY is susceptible to a number of complications. Where a sample convects, the distance molecules move during the delay is greater than for simple diffusion, and the estimate of the diffusion coefficient becomes greater than the true value. Rayleigh-Bénard convection has been known in NMR for a long time, and is known to result from heating the base of an NMR sample, giving rise to negative vertical temperature gradients. Here, cooling the base (and inadvertently the sides) of the sample is also shown to cause convection from transverse temperature gradients, known as Hadley convection and commonly observed in atmospheric circulation. The theory for convection from transverse temperature gradients is given and recommendations to reduce convection in NMR are made. DOSY analysis can also be challenging where signals from different species overlap. In such instances, it can help to reduce the overlap, which can be achieved by collapsing multiplets into singlet signals: pure shift NMR is a technique that uses band-selection in order to refocus scalar coupling during the free induction decay, leaving pure chemical shift information. However, PFGs can vary in strength across the sample, which can have an effect on band selective experiments, such as Zangger-Sterk pure shift experiments, in the measured peak amplitudes, and where DOSY is combined with the Zangger-Sterk pure shift sequence, the apparent diffusion coefficients are also altered, seemingly as a function of chemical shift. A correction for this is given, simply using a DOSY and a DOSY pure shift experiment, as an alternative to the current literature method (gradient mapping).An investigation into an emulsion, agrochemically important for the delivery of active ingredients (fertiliser,pesticides, etc.) to plants, was then undertaken, in the hopes of finding restricted diffusion, but instead discovering substantial chemical exchange on the diffusional timescale. Finally a program was written for the automated acquisition of DOSY data, without the need for a human controller to calibrate DOSY parameters for the optimum acquisition.

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Saalwächter, Kay. "Heteronuclear recoupling methods in solid state NMR." [S.l. : s.n.], 2000. http://ArchiMeD.uni-mainz.de/pub/2000/0070/diss.pdf.

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Ginzinger, Simon Wolfgang. "Bioinformatics Methods for NMR Chemical Shift Data." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-80776.

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Hollingsworth, K. G. "Characterisation of emulsion systems using NMR methods." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604170.

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Several aspects of emulsion characterisation via NMR are explored. This thesis begins by considering previous experimental work in determining the droplet-size distributions of emulsion systems by magnetic resonance restricted self-diffusion measurements. This is developed by applying regularisation techniques to analyse restricted diffusion measurements and avoid the limitation of fitting a particular functional form for the droplet-size distribution. Droplet-sizing is then extended to flowing emulsions by means of flow-compensated diffusion measurement. The success of this strategy is evaluated for several different model oil-in-water emulsions. An inverse Abel transform technique is applied to produce spatially-resolved droplet-size distributions for both stationary and flowing emulsion systems flowing within a pipe: a significant time saving is achieved by exploiting the symmetry of the system. The flow patterns of emulsions through an orifice plate, an elementary type of static mixer, are then considered. The ability of magnetic resonance to produce spatially-resolved velocity maps is exploited to make rheological measurement of emulsion systems. For the first time, the effect of altering the droplet-phase volume concentration on rheology is considered using magnetic resonance methods and the analysis is extended to emulsions having an apparent yield stress. The phenomenon of shear-induced migration of emulsions, unlike that of solid suspensions, has not previously been well studied: this work presents the first study of this effect by magnetic resonance methods. The effect of changing the volume concentration of droplets, the surfactant and the rotation speed of a Couette geometry are elucidated. One of the principal drawbacks of determining emulsion droplet-size distributions by magnetic resonance diffusion measurements is the time-consuming nature of the measurements: this work thus presents a fast method of making these measurements. This method is exploited to study both emulsion droplet coalescence and emulsion droplet breakup in a simple stirred vessel.

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Books on the topic "NMR methods"

1

Blümich, Bernhard, ed. Solid-State NMR I Methods. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78483-5.

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Kuhn, Lars T., ed. Hyperpolarization Methods in NMR Spectroscopy. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39728-8.

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Bargon, Joachim, and Lars T. Kuhn, eds. In situ NMR Methods in Catalysis. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71427-9.

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Hodgkinson, Paul, ed. Modern Methods in Solid-state NMR. Cambridge: Royal Society of Chemistry, 2018. http://dx.doi.org/10.1039/9781788010467.

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Blümich, Bernhard, ed. Solid-State NMR IV Methods and Applications of Solid-State NMR. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-79127-7.

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In vivo NMR imaging: Methods and protocols. New York: Humana, 2011.

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Morris, Gareth A. Multidimensional NMR methods for the solution state. Chichester, U.K: Wiley, 2010.

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Moorcroft, David. Molecular structure studies using NMR relaxation methods. Salford: University of Salford, 1985.

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A, Morris Gareth, and Emsley J. W, eds. Multidimensional NMR methods for the solution state. Hoboken, N.J: Wiley, 2010.

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Fedotov, V. D. Structures and dynamicsof bulk polymers by NMR-methods. Berlin: Springer-Verlag, 1989.

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Book chapters on the topic "NMR methods"

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Cagliani, Laura R., Paola Scano, and Roberto Consonni. "NMR Spectroscopy." In Spectroscopic Methods in Food Analysis, 143–88. Boca Raton, FL : CRC Press, Taylor & Francis Group, 2017.: CRC Press, 2017. http://dx.doi.org/10.1201/9781315152769-6.

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Guerry, Paul, and Torsten Herrmann. "Automated Protein Structure Determination Methods." In NMR of Biomolecules, 536–46. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527644506.ch33.

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Kemp, William. "Multipulse and Computational Methods in NMR." In NMR in Chemistry, 128–57. London: Macmillan Education UK, 1986. http://dx.doi.org/10.1007/978-1-349-18348-7_7.

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Raftery, Dan, and Bradley F. Chmelka. "Xenon NMR Spectroscopy." In Solid-State NMR I Methods, 111–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78483-5_3.

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Gross, D., K. Zick, T. Oerther, V. Lehmann, A. Pampel, and J. Goetz. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 47–77. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2a.

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Kose, Katsumi. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 77–89. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2b.

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Doughty, P. J., and P. J. McDonald. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 89–107. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2c.

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Casanova, F., J. Perlo, and B. Blümich. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 107–23. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2d.

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Ciobanu, Luisa, Jonathan V. Sweedler, and Andrew G. Webb. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 123–39. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2e.

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Han, Song-I., Josef Granwehr, and Christian Hilty. "Hardware and Methods." In NMR Imaging in Chemical Engineering, 139–63. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527607560.ch2f.

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Conference papers on the topic "NMR methods"

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Rieping, Wolfgang. "Structure determination from heterogeneous NMR data." In BAYESIAN INFERENCE AND MAXIMUM ENTROPY METHODS IN SCIENCE AND ENGINEERING: 24th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering. AIP, 2004. http://dx.doi.org/10.1063/1.1835222.

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Hsu, Wen-Fu, Xiaoyu Li, and R. W. Flumerfelt. "Wettability of Porous Media by NMR Relaxation Methods." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1992. http://dx.doi.org/10.2118/24761-ms.

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Sedláčková, E., V. Římal, H. Štěpánková, J. Štěpánek, Carlos Granja, and Claude Leroy. "NMR Investigation of Magnesium Specific Binding to DNA Duplex." In NUCLEAR PHYSICS METHODS AND ACCELERATORS IN BIOLOGY AND MEDICINE: Fifth International Summer School on Nuclear Physics Methods and Accelerators in Biology and Medicine. AIP, 2010. http://dx.doi.org/10.1063/1.3295660.

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Demissie, Taye B. "One electron changes the entire story: NMR versus pNMR." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2017 (ICCMSE-2017). Author(s), 2017. http://dx.doi.org/10.1063/1.5012295.

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Ryzhikov, Ivan, Ekaterina Nikolskaya, and Yrjö Hiltunen. "Combining Deep Learning Model and Evolutionary Optimization for Parameters Identification of NMR Signal." In 11th International Conference on Pattern Recognition Applications and Methods. SCITEPRESS - Science and Technology Publications, 2022. http://dx.doi.org/10.5220/0011004200003122.

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Kwak, Hyung T., Gabor Hursan, Jun Gao, Ahmad Harbi, and Shouxiang Ma. "The Methods of Correcting NMR Data from Dry Gas Wells Drilled with Formate Based Muds by Advanced NMR Techniques." In SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/188010-ms.

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Wear, Keith A., Kyle J. Myers, Robert F. Wagner, Sunder S. Rajan, and Laurence W. Grossman. "Comparison of methods for spectral estimation from 1D NMR time signals." In San Diego '92, edited by David C. Wilson and Joseph N. Wilson. SPIE, 1992. http://dx.doi.org/10.1117/12.130905.

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Zheng, Chuanxing, and Yiming Zhang. "Three wavelet-based methods for low-field pulsed NMR signal denoising." In International conference on Management Innovation and Information Technology. Southampton, UK: WIT Press, 2014. http://dx.doi.org/10.2495/miit132602.

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Bonnard, Bernard, Mathieu Claeys, Olivier Cots, and Pierre Martinon. "Comparison of numerical methods in the contrast imaging problem in NMR." In 2013 IEEE 52nd Annual Conference on Decision and Control (CDC). IEEE, 2013. http://dx.doi.org/10.1109/cdc.2013.6760586.

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Hoskins, Brian C., Paul Majors, Mukul M. Sharma, and George Georgiou. "Non-Invasive Imaging of Biofilms in Porous Media Using NMR Methods." In SPE/EPA Exploration and Production Environmental Conference. Society of Petroleum Engineers, 1999. http://dx.doi.org/10.2118/52733-ms.

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Reports on the topic "NMR methods"

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Cosman, M., A. T. Tran, J. Ulloa, and R. S. Maxwell. Development of Solid State NMR Methods for the Structural Characterization of Membrane Proteins: Applications to Understand Multiple Sclerosis. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/15007469.

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Maxwell, R., T. Baumann, and B. Taylor. Development of Direct and Optical Polarized Nuclear Magnetic Resonance (NMR) Methods for Characterization and Engineering of Mesophased Molecular Structures. Office of Scientific and Technical Information (OSTI), January 2002. http://dx.doi.org/10.2172/15005321.

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Mason, H. E., P. Campbell, and A. Sawvel. Progress Summary: Solid-state NMR spectroscopic methods are being used to deduce the molecular structure of degradation products in Material 2. Office of Scientific and Technical Information (OSTI), April 2019. http://dx.doi.org/10.2172/1557075.

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White, Thomas, Fernando Fondeur, Charles Coleman, David Diprete, Cecilia Diprete, and Brian Looney. Proton Nuclear Magnetic Resonance (H NMR) of Glycolate in Real Waste: Developing and Testing Analytical Methods for the Savannah River Site Liquid Waste System. Office of Scientific and Technical Information (OSTI), May 2021. http://dx.doi.org/10.2172/1784925.

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Hoitink, Harry A. J., Yitzhak Hadar, Laurence V. Madden, and Yona Chen. Sustained Suppression of Pythium Diseases: Interactions between Compost Maturity and Nutritional Requirements of Biocontrol Agents. United States Department of Agriculture, June 1993. http://dx.doi.org/10.32747/1993.7568755.bard.

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Several procedures were developed that predict maturity (stability) of composts prepared from municipal solid wastes (MSW). A respirometry procedure, based O2 uptake by compost, predicted (R2=0.90) the growth response of ryegrass in composts and an acceptable level of maturity. Spectroscopic methods (CPMAS13-NMR and DRIFT spectroscopy) showed that the stabilizing compost contained increasing levels of aromatic structures. All procedures predicted acceptable plant growth after approximately 110 days of composting. MSW compost suppressed diseases caused by a broad spectrum of plant pathogens including Rhizoctonia solani, Pythium aphanidermatum and Fusarium oxysporum. A strain of Pantoea agglomerans was identified that caused lysis of hyphae of R. solani. Evidence was obtained, suggesting that thermophilic biocontrol agents also might play a role in suppression. 13C-NMR spectra revealed that the longevity of the suppressive effect against Pythium root rot was determined by the concentration of readily biodegradable carbohydrate in the substrate, mostly present as cellulose. Bacterial species capable of inducing biocontrol were replaced by those not effective as suppression was lost. The rate of uptake of 14C-acetate into microbial biomass in the conducive substrate was not significantly different from that in the suppressive substrate although specific activity was higher. The suppressive composts induced systemic acquired resistance in cucumjber roots to Pythium root rot and to anthracnose in the foliage. Composts also increased peroxidase activity in plants by the conducive substrate did not have these effects. In summary, the composition of the organic fraction determined bacterial species composition and activity in the substrate, which in turn regulated plant gene expression relative to biological control.

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Hoitink, Harry A. J., Yitzhak Hadar, Laurence V. Madden, and Yona Chen. Sustained Suppression of Pythium Diseases: Interactions between Compost Maturity and Nutritional Requirements of Biocontrol Agents. United States Department of Agriculture, June 1993. http://dx.doi.org/10.32747/1993.7568746.bard.

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Several procedures were developed that predict maturity (stability) of composts prepared from municipal solid wastes (MSW). A respirometry procedure, based O2 uptake by compost, predicted (R2=0.90) the growth response of ryegrass in composts and an acceptable level of maturity. Spectroscopic methods (CPMAS13-NMR and DRIFT spectroscopy) showed that the stabilizing compost contained increasing levels of aromatic structures. All procedures predicted acceptable plant growth after approximately 110 days of composting. MSW compost suppressed diseases caused by a broad spectrum of plant pathogens including Rhizoctonia solani, Pythium aphanidermatum and Fusarium oxysporum. A strain of Pantoea agglomerans was identified that caused lysis of hyphae of R. solani. Evidence was obtained, suggesting that thermophilic biocontrol agents also might play a role in suppression. 13C-NMR spectra revealed that the longevity of the suppressive effect against Pythium root rot was determined by the concentration of readily biodegradable carbohydrate in the substrate, mostly present as cellulose. Bacterial species capable of inducing biocontrol were replaced by those not effective as suppression was lost. The rate of uptake of 14C-acetate into microbial biomass in the conducive substrate was not significantly different from that in the suppressive substrate although specific activity was higher. The suppressive composts induced systemic acquired resistance in cucumjber roots to Pythium root rot and to anthracnose in the foliage. Composts also increased peroxidase activity in plants by the conducive substrate did not have these effects. In summary, the composition of the organic fraction determined bacterial species composition and activity in the substrate, which in turn regulated plant gene expression relative to biological control.

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O'Connor, Richard J., Mark D. Brickhouse, Jeffrey S. Rice, H. D. Durst, and David J. McGarvey. NMR Method for the Quantitative Analysis of Liquid Samples. Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada430358.

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O'Connor, Richard J., Mark D. Brickhouse, H. D. Durst, David J. McGarvey, and William R. Creasy. NMR Method for the Quantitative Analysis of VX Hydrolysates. Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada430360.

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O'Connor, Richard J., Mark D. Brickhouse, David McGarvey, H. D. Durst, and William R. Creasy. NMR Method for the Quantitative Purity Analysis of Neat Feed Stock Samples. Fort Belvoir, VA: Defense Technical Information Center, August 2002. http://dx.doi.org/10.21236/ada406815.

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Hu, Yanyan. Solid state NMR method development and studies of biological and biomimetic nanocomposites. Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1029550.

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