Academic literature on the topic '2-D NMR analysis'

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Journal articles on the topic "2-D NMR analysis"

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Bohman, Daniel W., Zheng Li, Du Li, and Noel L. Owen. "The analysis of mixtures using the 2-D INADEQUATE NMR technique." Journal of Molecular Structure 480-481 (May 1999): 125–32. http://dx.doi.org/10.1016/s0022-2860(98)00625-5.

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Yuk, Jimmy, Jennifer R. McKelvie, Myrna J. Simpson, Manfred Spraul, and André J. Simpson. "Comparison of 1-D and 2-D NMR techniques for screening earthworm responses to sub-lethal endosulfan exposure." Environmental Chemistry 7, no. 6 (2010): 524. http://dx.doi.org/10.1071/en10084.

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Environmental context The application of metabolomics from an environmental perspective depends on the analytical ability to discriminate minute changes in the organism resulting from exposure. In this study, 1-D and 2-D Nuclear Magnetic Resonance (NMR) experiments were examined to characterise the earthworm’s metabolic response to an organochlorine pesticide. 2-D NMR showed considerable improvement in discriminating exposed worms from controls and in identifying the metabolites responsible. This study demonstrates the potential of 2-D NMR in understanding subtle biochemical responses resultin
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Sathyanarayana, Reshma, and Boja Poojary. "Ethyl 1-Butyl-2-(2-hydroxy-4-methoxyphenyl)-1H-benzo[d]imidazole-5-carboxylate." Molbank 2021, no. 1 (2021): M1192. http://dx.doi.org/10.3390/m1192.

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Ethyl 4-(butylamino)-3-nitrobenzoate upon “one-pot” nitro-reductive cyclization using sodium dithionite and substituted aldehyde in dimethyl sulphoxide affords ethyl 1-butyl-2-(2-hydroxy-4-methoxyphenyl)-1H-benzo[d]imidazole-5-carboxylate in an 87% yield. The structural characterization was determined by Fourier-transfer infrared spectroscopy (FT-IR), Proton nuclear magnetic resonance (1H-NMR), Carbon-13 nuclear magnetic resonance (13C-NMR), mass spectrometry, Ultraviolet-visible(UV-Vis), photoluminescence (PL), thin-film solid emission spectra, cyclic voltammetry (CV) and thermogravimetric (T
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Castellani, Michael P., John M. Wright, Steven J. Geib, Arnold L. Rheingold, and William C. Trogler. "Synthesis, molecular structure, and 2-D NMR analysis of bis(tetraphenylcyclopentadienyl)iron(II)." Organometallics 5, no. 6 (1986): 1116–22. http://dx.doi.org/10.1021/om00137a009.

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Kulakowska, Malgorzata, Jean-Robert Brisson, Douglas W. Griffith, N. Martin Young, and Harold J. Jennings. "High-resolution NMR spectroscopic analysis of the C-polysaccharide of Streptococcus pneumoniae." Canadian Journal of Chemistry 71, no. 5 (1993): 644–48. http://dx.doi.org/10.1139/v93-086.

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The complete structure of the complex cell-wall C-polysaccharide from Streptococcus pneumoniae R36A was elucidated using a combination of high-resolution NMR spectroscopy and theoretical calculations. The C-polysaccharide is composed of the following repeating unit β-D-Glcp1 → 3-α-D-AATp1 → 4-α-D-GalpNAc1 → 3-β-D-GalpNAc1 → 1-ribitol-5-phosphate where AAT is 2-acetamido-4-amino-2,4,6-trideoxygalactopyranoside. The C-polysaccharide contains two phosphorylcholine substituents per repeating unit, which are situated on O-6 of each of the two 2-acetamido-2-deoxy-galactopyranose residues. The repeat
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Atalay, Abdurrahman, Fatih Çelik, Yasemin Ünver, Kemal Sancak, and Kamil Kaygusuz. "Molecular Conformational Analysis, Spectroscopic Characterization, Intramolecular Hydrogen Bonding and Natural Bond Analysis of (E,Z)-2-(4- Amino-5-oxo-3-(thiophene-2-ylmethyl)-4,5-dihydro-1,2,4-triazole-1-yl)-N'- (thiophene-2-ylmethylene) Acetohydrazide." Letters in Organic Chemistry 16, no. 3 (2019): 215–25. http://dx.doi.org/10.2174/1570178615666181002141949.

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The optimized structural parameters and electronic properties including frontier molecular orbital (FMO) analysis, molecular electrostatic potential and NBO charge analysis of (E,Z)-2-(4- amino-5-oxo-3-(thiophene-2-ylmethyl)-4,5-dihydro-1,2,4-triazole-1-yl)-N'-(thiophene-2-ylmethylene) acetohydrazide were investigated by using density functional theory (DFT) at B3LYP/6-311++G(d,p) level. The global reactivity parameters were evaluated in accordance with the energy values of HOMO and LUMO of each determined conformer. The molecule was experimentally characterized by means of FT-IR and
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Zhong, Yonghong, Kejian Huang, Qiulian Luo, et al. "The Application of a Desktop NMR Spectrometer in Drug Analysis." International Journal of Analytical Chemistry 2018 (September 19, 2018): 1–7. http://dx.doi.org/10.1155/2018/3104569.

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A desktop NMR spectrometer was used to qualitatively analyze samples in drug-related cases in order to enhance the accuracy of the results and identify new drugs. Twelve known drugs and their derivatives were used to establish the parameters, conditions, and procedures for the methods and validate the feasibility and reliability of the methods. First, 1-D and 2-D NMR data for these 12 drugs and their derivatives were obtained in detail using a 600-MHz NMR spectrometer to create a data library. Next, some of these 12 drugs were analyzed using a Picospin 80 MHz desktop NMR spectrometer to set up
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Uhrín, Dušan, Vandana Chandan, and Eleonora Altman. "Structural characterization of the O-chain polysaccharide from Proteusmirabilis strain 7570." Canadian Journal of Chemistry 73, no. 10 (1995): 1600–1604. http://dx.doi.org/10.1139/v95-199.

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The O-chain polysaccharide produced by Proteusmirabilis strain 7570 was shown by chemical analysis and 1D and 2D NMR spectroscopy to be a high molecular weight acidic linear polymer of tetrasaccharide repeating units, composed of D-galacturonic acid, 2-acetamido-2-deoxy-D-galactose, and 2-acetamido-2-deoxy-D-glucose (2:1:1). In addition, native O-chain was randomly substituted by O-acetyl groups. Keywords: Proteus, lipopolysaccharide, O-chain, structure, NMR.
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Vlachou, Evangelia-Eirini, Thomas Balalas, Dimitra Hadjipavlou-Litina, and Konstantinos Litinas. "4-Amino-2-(p-tolyl)-7H-chromeno[5,6-d]oxazol-7-one." Molbank 2021, no. 2 (2021): M1237. http://dx.doi.org/10.3390/m1237.

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The new 4-amino-2-(p-tolyl)-7H-chromeno[5,6-d]oxazol-7-one was successfully prepared through the Au/TiO2-catalyzed NaBH4 activation and chemoselective reduction of the new 4-nitro-2-(p-tolyl)-7H-chromeno[5,6-d]oxazol-7-one. The latter was synthesized by the one-pot tandem reactions of 6-hydroxy-5,7-dinitrocoumarin with p-tolylmethanol under Au/TiO2 catalysis. The dinitrocoumarin was obtained by the nitration of 6-hydroxycoumarin with cerium ammonium nitrate (CAN). The structure of the synthesized compounds was confirmed by FT-IR, HR-MS, 1H-NMR and 13C-NMR analysis. Preliminary biological tests
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Lu, Ying, Yingjie He, Shihao Zhu, Xiaohong Zhong, Dong Chen, and Zhonghua Liu. "New Acylglycosides Flavones from Fuzhuan Brick Tea and Simulation Analysis of Their Bioactive Effects." International Journal of Molecular Sciences 20, no. 3 (2019): 494. http://dx.doi.org/10.3390/ijms20030494.

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Four novel acylglycosides flavones (AGFs) including two quercetin acylglycosides and two kaempferol acylglycosides were isolated from Fuzhuan brick tea (FBT) as follows: quercetin 3-O-[α-l-rhamnopyranosyl (1→3)] [2-O’’-(E)-p-coumaroyl] [β-d-glucopyranosyl (1→3)-α-l-rhamnopyranosyl (1→6)]-β-d-galactoside was named as camelliquercetiside E (1), quercetin 3-O-[α-l-rhamnopyranosyl (1→3)] [2-O’’-(E)-p-coumaroyl] [α-l-rhamnopyranosyl (1→6)]-β-d-galactoside was named as camelliquercetiside F (2), kaempferol 3-O-[α-l-arabinopyranosyl (1→3)] [2-O’’-(E)-p-coumaroyl] [β-d-glucopyranosyl (1→3)-α-l-rhamnop
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Dissertations / Theses on the topic "2-D NMR analysis"

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Tsay, Fuh-Rong. "Synthesis and 2-D NMR Analysis of a New Phenyl-Substituted Polycyclic Compound." Thesis, University of North Texas, 1991. https://digital.library.unt.edu/ark:/67531/metadc504049/.

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Diels-Alder [4+2] cycloaddition of a mixture of 1- and 2 methylcyclopentadiene to 2-phenyl-g.-benzoquinone affords a mixture of four nd cycloadducts. A single, isomerically pure cycloadduct was isolated by careful column chromatography. Stereospecific reduction of this material with sodium borohydride and cerium(III) chloride 'affords a single, isomerically pure tricyclic diol. The structures of the cycloadduct and this tricyclic diol, established via analysis of their one- and two-dimensionial NMR spectra, were shown to be (1-methyl-5-phenyltricyclo[6.2.1.02,7]undec a-4,9 diene-3,6-dione and
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Mazeau, Karim. "Modelisation des conformations de l'adn : application au cas d'un adduit intrabrin cis-(pt(nh3)2(d(pgpcpg)))." Orléans, 1988. http://www.theses.fr/1988ORLE2030.

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Books on the topic "2-D NMR analysis"

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Organic structure determination using 2-D NMR spectroscopy. Academic Press, 2008.

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Simpson, Jeffrey H. Organic structure determination using 2-D NMR spectroscopy: A problem-based approach. 2nd ed. Academic Press, 2012.

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Organic Structure Determination Using 2-D NMR Spectroscopy: A Problem-Based Approach. Elsevier Science & Technology Books, 2011.

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Book chapters on the topic "2-D NMR analysis"

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"of storage as short as possible, only; 24 h should not be ex­ ceeded. Table III comprises the most important criteria for valid static and dynamic sampling. It seems that both the guide of Warren Springs, U.K. and the VDI-Guideline might be a useful base to describe commonly accepted sampling procedures aiming at a standardization of sampling which might be a first step for a harmonization of olfactometric measurements in the different laboratories and countri es. REFERENCES (1) BULLEY, N.R. and D. PHILLIPS (1980). Sensory evaluation of agricul­ tural odours: A critical review. Can. Agric. Eng. 22, 107 - 112. (2) HENRY, J.G. and R. GEHR (1980). Odour control: An operator's guide. Journal WPCF 52, 2523 - 2537. (3) ROOS, C., J.A. DON and J. SCHAEFER (1984). Characterization of odour-polluted air. In: Proc.Int.Symp., Soc. Beige de Filtr. (eds.), 25-27 April 1984, Louvain-La-Neuve, Belgium, pp. 3 - 22. (4) BAKER, A.R. and R.C. DOERR (1959). Methods of sampling and storage of air containing vapors and gases. Int.J.Air Poll. 2, 142 - 158. (5) SCHUETTE, F.J. (1967). Plastic bags for collection of gas samples. Atmosph.Environm. 1, 515 - 519. (6) SCHODDER, F. (1977T. Messen von Geruchsstoffkonzentrationen, Erfassen von Geruch. Grundl. Landtechnik 27, 73 - 82. (7) CORMACK, D., T.A. DORLING and B.W7J. LYNCH (1974). Comparison of tech­ niques for organoleptic odour-intensity assessment. Chem.Ind. (Lon­ don) no. 2, 857 - 861. (8) SCHUETZLE, D., T.J. PRATER and S. RUDDELL (1975). Sampling and anal­ ysis of emissions from stationary sources. I. Odour and total hydro­ carbons. APCA Journal 25, 925 - 932. (9) WAUTERS, E., E. WALRAVENS, E. MUYLLE and G. VERDUYN (1983). An evalu­ ation of a fast sampling procedure for the trace analysis of volatile organic compounds in ambient air. Environm.Monitor.Assessm. 3, 151-160. (10) LACHENMAYER, U. and H. KOHLER (1984). Untersuchungen zur Neuentwick-lung eines Olfaktometers. Staub - Reinhalt. Luft 44, 359 - 362. (11) BERNARD, F. (1984). Simplified methods of odour measurement: Indus­ trial application and interest for administrative control. Proc. Int. Symp., Soc. Beige de Filtr. (eds.), 25 - 27 April 1984, Louvain-La-Neuve, Belgium, pp. 139 - 150. (12) GILLARD, F. (1984). Measurement of odours by dynamic olfactometry. Application to the steel and carbonization industries. Proc.Int.Symp., Soc. Beige de Filtr. (eds.), 25 - 27 April 1984, Louvain-La-Neuve, Belgium, pp. 53 - 86. (13) MANNEBECK, H. (1975). Tragbare Olfaktometer. VDI-Bericht 226, 103-105. (14) BEDBOROUGH, D.R. (1980). Sensory measurement of odours. In: Odour Control - a concise guide, F.H.H. Valentin and A.A. North (eds.), Warren Springs Laboratories, Stevenage, Hertfordshire, U.K., pp. 17-30. (15) THIELE, V. (1984). Olfaktometrie an einer Emissionsquelle - Ergebnis-se des VDI-Ringvergleichs. Staub - Reinhalt. Luft 44, 342 - 351. (16) DUFFEE, R.A., J.P. WAHL, W. MARRONE and J.S. NADERT1973). Defining and measuring objectionable odors. Internat. Pollution Eng. Congress, Philadelphia, paper no 25a, pp. 192 - 201." In Odour Prevention and Control of Organic Sludge and Livestock Farming. CRC Press, 1986. http://dx.doi.org/10.1201/9781482286311-21.

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Conference papers on the topic "2-D NMR analysis"

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Wang, Xinglin, Philip M. Singer, Zeliang Chen, et al. "MACRO-PORE HYDROCARBON SATURATION FROM NMR T1 - T2 MAPS IN THE UNCONVENTIONAL POINT-PLEASANT FORMATION." In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0076.

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Of particular interest in unconventional reservoir characterization is an NMR log of total porosity and macro-pore hydrocarbon saturation, where both quantities are independent of a mineralogy model. A log of the macro-pore hydrocarbon saturation has a direct impact on calculating hydrocarbon reserves. It helps identify sweet spots in the reservoir to optimize horizontal-well placement for hydraulic fracturing and production. It also helps avoid water production which would negatively affect the economics of the well. However, NMR logs in unconventional shale are challenging due to potential o
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Lorente-Crespo, Maria, and Carolina Mateo-Segura. "Analysis of 2-D periodic leaky-wave nano-antennas in the NIR." In 2014 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2014. http://dx.doi.org/10.1109/aps.2014.6904373.

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Plusquellic, Jim, and Dhruva Acharyya. "Leveraging the Power Grid for Localizing Trojans and Defects." In ISTFA 2010. ASM International, 2010. http://dx.doi.org/10.31399/asm.cp.istfa2010p0338.

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Abstract The finite, non-zero resistance of the metal wires that define the power grid of chips require the insertion of multiple ports between the grid and the external power supply in order to meet voltage stability requirements across the 2-D plane of the chip. The ports connect to the power grid along its edges for peripheral pad configurations, while, for C4 or array pad configurations, the ports are distributed across the 2-D surface of the chip. In either case, the availability of multiple power ports can be leveraged for detecting and localizing defects and/or Trojan circuits. A locali
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Shen, Guowu, William R. Tyson, and James A. Gianetto. "CMOD Compliance of B×B Single Edge Bend Specimens." In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78037.

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In ASTM standard E1820, the single edge bend (SE(B)) geometry is one of those recommended for fracture toughness testing. The width to thickness (W/B) ratio recommended in E1820 for this specimen is 2. However, in certain cases, it is desirable to use specimens having alternative W/B ratios; the range of W/B suggested in E1820 is 1 to 4. In E1820, the crack size a may be evaluated during J-integral or CTOD resistance testing using the crack mouth opening displacement (CMOD) elastic unloading compliance C. The equation given to relate a to C using a dimensionless compliance BCE incorporates You
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Donato, Gustavo Henrique B., and Felipe Cavalheiro Moreira. "Improved Compliance Solutions for C(T), SE(B) and Clamped SE(T) Specimens Including Side-Grooves, Varying Thicknesses and 3-D Effects." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-39513.

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Fracture toughness and Fatigue Crack Growth (FCG) experimental data represent the basis for accurate designs and integrity assessments of components containing crack-like defects. Considering ductile and high toughness structural materials, crack growing curves (e.g. J-R curves) and FCG data (in terms of da/dN vs. ΔK or ΔJ) assumed paramount relevance since characterize, respectively, ductile fracture and cyclic crack growth conditions. In common, these two types of mechanical properties severely depend on real-time and precise crack size estimations during laboratory testing. Optical, electri
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Lee, Kuan-Wei, and Kuang C. Lin. "Aerosol Particle Impaction on Fiber Arrays in a Flow Stream Using a Lattice Boltzmann Model." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21691.

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Transport of aerosol particles is of great interest for theory and applications of fibrous filters. Understanding how to design better filters can help for future implementation in the areas of air cleaning and air conditioning. The aim of this paper is to present a 2-D computational model of particle-laden flows over staggered fibers at a Reynolds number of 100 using a Lattice Boltzmann method. A Lagrangian analysis is used to predict the particle impaction on a multi-fiber filter. After an initial validation of the model, the characteristic of particle impaction on fibers in staggered arrang
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Al-Yahia, Omar S., Yacine Addad, Ho Joon Yoon, and Sung Oh Cho. "Numerical Analysis of Single-Phase Thermal Hydraulic Parameters Along Nanostructured Coating Film." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16316.

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Abstract In typical pressurized water reactors, zirconium alloys are used as cladding material for the fuel. However, zircalloy is known to face problems with the high temperature steam, due to the chemical process of oxidation, the oxygen molecules will be separated from the water molecules of the coolant leading to hydrogen gas releases. Recently, a research team at KAIST, South Korea suggested a methodology to fabricate nanoporous oxide layer with the aim of preventing the zircalloy outer surface from reacting with the coolant. Although, this new proposal offers a better solution to prevent
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Pinti, Marie, and Shaurya Prakash. "Fabrication of Hybrid Micro-Nanofluidic Devices With Centimeter Long Ultra-Low Aspect Ratio Nanochannels." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65763.

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Hybrid microfluidic and nanofluidic devices have a variety of applications including water desalination, molecular gates and DNA sieving among several other lab-on-chip uses. Most microfluidic and nanofluidic devices currently are fabricated in glass, silicon, polydimethylsiloxane (PDMS), or with a combination of these materials. In order to impart functionality, metals, polymers or auxiliary components are often integrated with these devices. Ultra-low aspect ratio channels have several advantages including critical dimensions on the nanoscale but increased throughput compared to higher aspec
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Donato, Gustavo Henrique B., and Felipe Cavalheiro Moreira. "Effects of Side-Grooves and 3-D Geometries on Compliance Solutions and Crack Size Estimations Applicable to C(T), SE(B) and Clamped SE(T) Specimens." In ASME 2013 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/pvp2013-98018.

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Engineering procedures for design and integrity assessment of structural components containing crack-like defects are highly dependent on accurate fracture toughness and Fatigue Crack Growth (FCG) experimental data. Considering ductile and high toughness structural materials, crack growing curves (e.g. J-R curves) and FCG data (in terms of da/dN vs. ΔK or ΔJ) assumed paramount relevance. In common, these two types of mechanical properties severely depend on real-time and precise crack size estimations during laboratory testing. Optical measurement, electric potential drop or (most commonly) el
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Kuznetsov, M., A. Lelyakin, and W. Breitung. "Numerical Simulation of Radiolysis Gas Detonation in BWR Exhaust Pipes and Mechanical Response of the Piping to the Detonation Pressure Loads." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48498.

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1-D numerical calculations of radiolysis gas detonation and mechanical response of a 12.5-m long BWR exhaust pipe have been performed. To reproduce one of scenarios of steam condensation with following radiolysis gas accumulation in an exhaust pipe initially filled with nitrogen at an initial pressure of 1.6 bar and temperature of 35°C, nitrogen diluted radiolysis gas mixtures were used for the numerical simulations. Nitrogen concentration in radiolysis gas composition was changed in the range of 0–80 mol.%. It permits to significantly change detonation properties of the test mixtures. Differe
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