Report No xxxx - Instytut Fizyki JÄdrowej PAN

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IDENTIFICATION AND DETERMINATION OF NAPROXENE ALLYL ESTERS DIASTEREOISOMERS WITH PROTON-NMR SPECTROSCOPY Maciej Skarżyński, Krzysztof Krajewski, Jerzy Krzywda, Hanna Fitak Pharmaceutical Research Institute, Warsaw, Poland The work is an example of the use of NMR spectroscopy for the identification and determination of particular diastereoisomers in their mixtures. The diastereoisomers of naproxene allyl esters can be fast and easily distinguished and determined with proton-NMR spectra. Results of the series of PMR analyses performed in various solvents are presented and compared with those obtained with high-pressure liquid chromatography and with optical rotation measurements. Sources of error as well as limits of the detection and the determination and accuracy of the determination are discussed. 78
MAGNETIC SUSCEPTIBILITY EVALUATION BY MEANS OF MRI TECHNIQUE Ing. Miloslav Steinbauer 1 , Ing. Karel Bartušek, DrSc 2 1 Faculty of Electrical Engineering and Communication, Brno University of Technology, Purkyňova 464/118, 612 00 Brno, steinbau@feec.vutbr.cz; 2 Institute of Scientific Instruments, Academy of Sciences of the Czech Republic, Královopolská 147, 612 00 Brno, bar@isibrno.cz The determination of magnetic susceptibility of weakly magnetic materials is simple for substances giving MR signal by comparison with substance, whose susceptibility is known [2]. In this paper we will discuss measuring technique suitable for substances with no signal in MR tomography. This method is based on constant magnetic flux in working space superconducting magnet. Inserting of the specimen with different value of magnetic susceptibility causes local deformation of homogeneous magnetic field – idealized example see Fig. 1. Using MRI field echo technique we can acquire image of the magnetic field homogeneity in measured volume of specimen. From this image we derived a course of the magnetic induction module in the measured z χ 2 χ 1 material. In our example the paramagnetic specimen of thickness x 0 is inserted in homogeneous magnetic B s field with induction B 0 parallel with z-axis. Magnetic x 0 induction in the specimen with susceptibility χ s B 0 increases to Bs = B0 ⋅ ( 1+ χs) . When material of the x specimen gives no MR signal, the indirect method of ∆B 0 (x) induction Bs computation can be used. Assuming constant magnetic flux Φ thru normal area of crosssection S of the magnet working space φ = B ⋅dS =const. Fig. 1. Local deformation of ∫∫ . Suppose the specimen has enough S magnetic field due to weakly large length in y-axes direction, so we can neglect boundary effect and for z-x cross-section in the middle of the specimen Fig. 1 we can write ∫ ∆ B0 ( x) ⋅ dx = 0 , what means that sum of hatched areas bounded by curve in Fig. 1 with respect to the base value of induction B0 is zero. If substance surrounding the specimen gives MR signal and we can determine the course of ∆B0 ( x) , we also can compute the value B s and χ s values of the investigated specimen. Several numerical tests were carried to verify the method χ s mentioned above. Numerical modelling was provided in Ansys 6.1 software. Model was meshed with 31642 nodes and 49775 elements of Solid96 type. Boundary conditions were adjusted so that induction B 0 = 4,700 T in z-axes direction. Module of magnetic χ 2 induction B along the “path” is depicted in Fig. 2. The χ 1 data set from graph shown in Fig. 2 was numerically integrated and area bounded by the curve B and base level B 0 = 4.700 T was evaluated. Founded difference between areas over and below B 0 level was Fig. 2. The course of magnetic induction 9.16·10 -6 T.m. Relative deviation 9 % from initial slony the path marked in Fig. 2 χ 1 = -9·10 -4 , estimation was caused due to numerical error. χ s = 3·10 -3 , χ 2 = 0 79
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The Henryk Niewodniczański INSTITU
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Contents R. Banyś, A. Słowik, M.
Page 5 and 6:
J. Kolmas, M. Uniczko, E. Kalinowsk
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Ł. Popenda, Z. Gdaniec, G. Dominia
Page 9 and 10:
USEFULNESS OF PROTON MAGNETIC RESON
Page 11 and 12:
INFLUENCE OF PARAMAGNETIC IONS ON F
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NMR RELAXATION OF PAPER SAMPLES Bar
Page 15 and 16:
SPIN-LATTICE RELAXATION OF D 2 QUAN
Page 17 and 18:
INVESTIGATION OF NEUROPROTECTING EF
Page 19 and 20:
OPTICAL PUMPING OF 3 He Katarzyna C
Page 21 and 22:
NMR STUDY OF GELATION PROCESS OF LO
Page 23 and 24:
MRI INVESTIGATIONS OF HYDROGEL FORM
Page 25 and 26:
CHEMICAL SHIFT TITRATION AT THE INT
Page 27 and 28: LOCAL DYNAMICS AND ORGANIZATION OF
Page 29 and 30: 1 H NMR DETECTION OF σ-ADDUCTS IN
Page 31 and 32: HYDRATION OF WHEAT PHOTOSYNTHETIC M
Page 33 and 34: References: 1. H. Harańczyk On wat
Page 35 and 36: (EDV) and end-systolic (ESV) volume
Page 37 and 38: THE MOST STABLE POLYMORPHIC FORM OF
Page 39 and 40: A DETERMINATION OF ABSOLUTE SHIELDI
Page 41 and 42: DIAGNOTIC VALUE OF MRI IN CONVERSIO
Page 43 and 44: NMR AND FTIR STUDY OF MOLECULAR DYN
Page 45 and 46: EFFECTS OF INTERMOLECULAR INTERACTI
Page 47 and 48: 600000 Integral of 1D MRI profils [
Page 49 and 50: simultaneous analyse of the tempera
Page 51 and 52: 1 H NMR STUDIES OF PLATINUM(II) CHL
Page 53 and 54: 35 Cl-NQR STUDY OF ELECTRONIC STRUC
Page 55 and 56: 35 Cl- NQR AND 1 H-NMR STUDY OF MOL
Page 57 and 58: THE SYNTHESIS AND NMR ANALYSIS OF T
Page 59 and 60: STUDY OF MOTIONAL PROCESSES OF DRAW
Page 61 and 62: intensity (arb. units) 0,20 0,15 0,
Page 63 and 64: data for Cβ-nonplanar model 3 are
Page 65 and 66: T 1 DISPERSION AND SELF-DIFFUSION N
Page 67 and 68: A LOW FIELD MRI SYSTEM FOR HYPERPOL
Page 69 and 70: 1 H MAS NMR OF FLAVONOIDS Katarzyna
Page 71 and 72: EFFECT OF TEMPERATURE ON LIPOSOME S
Page 73 and 74: 1 H, 13 C NMR AND GIAO/DFT CALCULAT
Page 75 and 76: NMR STUDY OF THE HUMIC ACIDS EXTRAC
Page 77: NMR STUDY OF LAYERED ANGANITE La 1.
Page 81 and 82: A NOVEL SOURCE OF MAGNETIC FIELD FO
Page 83 and 84: DETERMINATION OF AMINO ACIDS IN BOD
Page 85 and 86: MOLECULAR DYNAMICS OF TERT-BUTYL CH
Page 87 and 88: MR MICROSCOPY IN COMPARISON OF YOUN
Page 89 and 90: NH CH CH 2 NH CH CO COONa n CH 2 m
Page 91 and 92: 35 Cl-NQR STUDY OF MOLECULAR DYNAMI
Page 93 and 94: 35 Cl-NQR STUDY OF THE SUBSTITUENT
Page 95 and 96: 13 C AND 1 H NUCLEAR MAGNETIC SHIEL
Page 97 and 98: 13 C CPMAS NMR OF ANTHOCYANINS AND
Page 99 and 100: INVESTIGATION OF TRANSESTERIFICATIO
Page 101 and 102: T 2 RELAXATION MAP OF ARTICULAR CAR
Page 103 and 104: MICROTOMOGRAPHY STUDIES OF TABLETS
Page 105 and 106: MAPPING OF THE BI-EXPONENTIAL DIFFU
Page 107 and 108: DEUTERIUM NMR IN RMn 2 D 2 (R = Y,
Page 109 and 110: The neutron scattering (IINS, QNS,
Page 111 and 112: STRUCTURE OF 4-QUINOLINONES ANALYSE
Page 113: NMR MULTIPOLE RELAXATION IN THE ROT
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