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Showing 1 to 20 of 70 for “"31P NMR"”.

  1. Phosphorus-31 NMR Spectroscopy of Parasitic Protozoa

    Moreno, Benjamin JonUniversity of Illinois at Urbana-Champaign2015

    31P NMR spectra have been obtained of various parasitic protozoa including Trypanosoma cruzi, Leishmania major, Trypanosoma brucei, Plasmodium berghei, Toxoplasma gondii, and Cryptosporidium parvum. The unifying features of solution-state 31P NMR spectra of acid extracts of these parasites were …

    uiuc Repository record

  2. Weiterführende Techniken in der Spektroskopischen Bildgebung in vivo durch heteronuklearen Polarisationstransfer und anatomie-basierte Spektrenquantifizierung

    Weber-Fahr, WolfgangUniversität Heidelberg

    31P-NMR-Signalverstärkung durch heteronuklearen Polarisationstransfer wurde an einem mit zwei Hochfrequenzsystemen ausgestatteten Ganzkörper-NMR-Tomographen sowohl an Modell-Lösungen, als auch invivo erreicht. Mit dem RINEPT-Doppelresonanz-Experiment können die viel größeren Unterschiede in den …

    heid-diss Repository record

  3. Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity.

    Liu, JieUniversity of North Texas2001

    … and fully characterized in solution by IR and 31P NMR spectroscopy. VT 31P NMR data indicate that the bpcd ligand in RCCo3(CO)7(bpcd) is fluxional at 187 K in THF. Clusters 2, 4, and 5 have been structurally characterized by X-ray diffraction analyses.

    unt Repository record

  4. Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation

    Laarkamp, Kirsten L.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution2000

    … based on solubility, was used in concert with 31P nuclear magnetic resonance spectroscopy (31P-NMR) to quantify Porg functional group concentrations. The coupled extraction/31P-NMR method was applied to three sediment cores from the Santa Barbara Basin, and the first-ever high-resolution depth …

    woods-hole Repository record

  5. Organic phosphorus in marine sediments : chemical structure, diagenetic alteration, and mechanisms of preservation

    Laarkamp, Kirsten LynnMassachusetts Institute of Technology2000

    … Prog nuclear magnetic resonance spectroscopy (31P-NMR) to quantify Prog functional group concentrations. The coupled extraction/ 31P-NMR method was applied to three sediment cores from the Santa Barbara Basin, and the first-ever high-resolution depth profiles of molecular-level Porg …

    mit Repository record

  6. Quantenmechanische Feinstruktur und molekulare Dynamik gekoppelter Spin-1/2-Systeme in der In-vivo-NMR-Spektroskopie

    Schröder, LeifUniversität Heidelberg

    … und Adenosin-5'-triphosphat (ATP) mit 1H-NMR-Spektroskopie bzw. 31P-NMR-Spektroskopie (für ATP) an einem konventionellen Ganzkörper-MR-Tomographen bei 1,5 T untersucht. Die Systeme weisen sowohl skalare als auch residuale dipolare Spin-Spin-Kopplungen verschiedener Stärken auf. Daraus …

    heid-diss Repository record

  7. The synthesis, characterization and reactivity of metallacycloalkanes and their precursors

    Madzivire, Cecilia RutendoDepartment of Chemistry2010

    … synthesized and characterized by IH, I3C and 31p NMR spectroscopy, elemental analysis and mass spectrometry. I3C NMR data for these complexes is herein presented for the first time. A new route for the synthesis of dicarbonyldibromide rhenium complexCp*Re(CO)2Br2 affording the product in very …

    cape-town Repository record

  8. The synthesis, characterization and decomposition studies of novel palladacycloalkanes and their precursors

    Mahamo, TebelloDepartment of Chemistry2007

    … The complexes were characterized by 1H, 13C and 31p NMR spectroscopy, mass spectrometry as well as elemental analysis. The palladacycloalkanes were prepared from the bis(alkenyl) complexes of the type cis-[Pd{(CH2)nCH=CH2hL21 (n = 2, 3; L = PPh3; L2 = COD, bipy, dppe) by ring closing metathesis …

    cape-town Repository record

  9. Synthesis of P-Stereogenic Bisphosphine Ligands: Application as Hemi-labile Ligands in the Asymmetric Pauson-Khand Reaction

    Haji-Cheteh, ChehasnahUniversity of York2010

    … the phosphine oxide was studied through 1H and 31P NMR spectra. To evaluate the new hemi-labile ligands, they were used as a coordinating ligand with Co2(CO)8 in a catalytic asymmetric intramolecular Pauson-Khand reaction of a 1,6-enyne to a cyclopentenone. The synthesis of new P-stereogenic …

    whiterose Repository record

  10. Development of Novel Methods for the Installation of Trifluoromethyl/Boryl and 1,2,4-Oxadiazole Moieties

    Jos, SwethaVirginia Tech2022

    … alkyne in a trans fashion as established from 2D NMR and X-ray crystallography. The reaction products are converted into useful intermediates under Suzuki Miyuara, protodeborylation, etc. 31P NMR tudies were conducted to understand the mechanism of the reaction, which is supported by the DFT …

    vt Repository record

  11. Synthesis and solid state F-NMR studies on fluorine-labeled antimicrobial peptide RK-21

    Budarapu, Mahender

    … peptide RK-21 was chemically synthesized and 19F-NMR studies were done. NMR studies were done at various peptide concentrations, on different lipid bilayer compositions and temperatures. 31P-NMR studies did not show any micellar fragments, eliminating the detergent-like mechanism for activity. …

    emich Repository record

  12. Dilution acidosis : the effects of hyperosmolality on acid-base balance and ventilation

    Kasserra, Claudia E.University of British Columbia1993

    … and the implications for ventilatory control. 31P nuclear magnetic resonance spectroscopy (31P NMR) on duck pectoral muscle showed that the dilution acidosis caused by acute hyperosmolality was accompanied by an intracellular contraction alkalosis, implying the uncoupling of intra- and …

    ubc Repository record

  13. Membrane fragmentation by a 20-29 fragment of human islet amyloid polypeptide and rat amyloid polypeptide

    Samisetti, Shyamprasad2007

    … the rat version, rIAPP20-29, using solid-state NMR experiments on nanotube arrays of anodic aluminum oxide containing aligned phospholipid membranes.</p> <p>31P NMR results suggest that membrane fragmentation by hIAPP is related to peptide aggregation as the presence of Congo red, an inhibitor …

    emich Repository record

  14. Hydrothermal Liquefaction of Municipal Sludge: Feedstock Composition, Inorganic Interactions, and Co-Liquefaction as a Dewatering Alternative

    Poli, Joao VictorUniversity of Kansas2026

    … simulated distillation, ICP-OES, and solid-state 31P NMR. The first work in this dissertation demonstrated that wastewater treatment configuration and storage regime produce predictable shifts in HTL behavior. Lime addition raised the CAS feedstock Ca:P molar ratio to 3.13, drove quantitative …

    ku Repository record

  15. Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale

    Acker, MarianneMassachusetts Institute of Technology and Woods Hole Oceanographic Institution2021

    … marine cyanobacterium Prochlorococcus SB. Using 31P NMR, we found Prochlorococcus SB allocates ~50% of its cellular P to phosphonates. Allocation of P to phosphonates was conserved under P-limitation, and further investigation revealed phosphonates were associated with proteins. The discovery of …

    woods-hole Repository record

  16. Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale

    Acker, MarianneMassachusetts Institute of Technology2021

    … marine cyanobacterium Prochlorococcus SB. Using 31P NMR, we found Prochlorococcus SB allocates ~50% of its cellular P to phosphonates. Allocation of P to phosphonates was conserved under P-limitation, and further investigation revealed phosphonates were associated with proteins. The discovery of …

    mit Repository record

  17. Molekulare Dynamik in binären Glasbildnern studiert mittels 31P- und 2H-NMR

    Bock, DanielUniversität Bayreuth

    … Anwendung der Kernspinresonanz-Spektroskopie (NMR) mit Methoden wie der Linienformanalyse, Messung des Stimulierte-Echo-Zerfalls, der zweidimensionalen (2D-) Spektren und der Spinrelaxation ermöglicht eine selektive Betrachtung der beiden Komponenten. Es werden Systeme untersucht, welche sich …

    bayreuth Repository record

  18. A PTA (1,3,5-triaza-7-foszfaadamantán) AgClO4-al vízben képzett koordinációs polimerének jellemzése

    Suller, Raimond2022

    … foszfin „in situ” oldatának vettük fel a 1H-, és 31P-NMR spektrumait. Megállapítottuk, hogy az „in situ” képződő részecskében Ag-PTA kölcsönhatás jön létre, ugyanis a vegyület kémiai eltolódása -77,89 ppm, ami hasonlít az ismert [(Ag(κOH2)(μ3-PTAκ3P:N:N)]n(X)n (X=NO3, BF4, PF6) típusú …

    debrecen Repository record

  19. Simultaneous extraction of order parameters and orientational distribution fuctions from 31[superscript]P NMR spectra of magnetically partially oriented phospholipid bilayers

    Paul, Launy C.Brock University1996

    Order parameter profiles extracted from the NMR spectra of model membranes are a valuable source of information about their structure and molecular motions. To al1alyze powder spectra the de-Pake-ing (numerical deconvolution) ~echnique can be used, but it assumes a random (spherical) dist.ribution …

    brock Repository record

  20. Glucoseaufnahme am infarzierten Rattenherzen

    Höning, JensUniversität Würzburg

    … mM Deoxyglucose (DG) und 5 mM Pyruvat zugesetzt. 31P NMR Spektren wurden über 30 Minuten aufgezeichnet. DG wird im Myokard phosphoryliert (P-DG), aber nicht weiter verstoffwechselt. Deshalb spiegelt die P-DG Akkumulation die Aufnahme wieder. In einem zweiten Versuchsteil wurde die Glucoseaufnahme …

    wurz-thes Repository record

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