A simple sample container for NMR pressure and temperature studies on liquids

Sawyer, David W.; Gale, B N

doi:10.1088/0022-3735/6/12/021

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…The difference can be ascribed to the convection effect in their apparatus. [48][49][50] For the case of 2 H 2 O, the D values of Jonas and co-workers 30 are in reasonable agreement with the present values ͓see Fig. 5͑b͔͒.…”

Section: A Self-diffusion Coefficientssupporting

confidence: 89%

A new high-temperature multinuclear-magnetic-resonance probe and the self-diffusion of light and heavy water in sub- and supercritical conditions

Yoshida

Wakai

Matubayasi

et al. 2005

The Journal of Chemical Physics

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A high-resolution nuclear-magnetic-resonance probe (500 MHz for 1H) has been developed for multinuclear pulsed-field-gradient spin-echo diffusion measurements at high temperatures up to 400 degrees C. The convection effect on the self-diffusion measurement is minimized by achieving the homogeneous temperature distributions of +/-1 and +/-2 degrees C, respectively, at 250 and 400 degrees C. The high temperature homogeneity is attained by using the solid-state heating system composed of a ceramic (AlN) with high thermal conductivity comparable with that of metal aluminium. The self-diffusion coefficients D for light (1H2O) and heavy (2H2O) water are distinguishably measured at subcritical temperatures of 30-350 degrees C with intervals of 10-25 degrees C on the liquid-vapor coexisting curve and at a supercritical temperature of 400 degrees C as a function of water density between 0.071 and 0.251 gcm3. The D value obtained for 1H2O is 10%-20% smaller than those previously reported because of the absence of the convection effect. At 400 degrees C, the D value for 1H2O is increased by a factor of 3.7 as the water density is reduced from 0.251 to 0.071 gcm3. The isotope ratio D(1H2O)D(2H2O) decreases from 1.23 to approximately 1.0 as the temperature increases from 30 to 400 degrees C. The linear hydrodynamic relationship between the self-diffusion coefficient divided by the temperature and the inverse viscosity does not hold. The effective hydrodynamic radius of water is not constant but increases with the temperature elevation in subcritical water.

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Section: A Self-diffusion Coefficientssupporting

confidence: 89%

A new high-temperature multinuclear-magnetic-resonance probe and the self-diffusion of light and heavy water in sub- and supercritical conditions

Yoshida

Wakai

Matubayasi

et al. 2005

The Journal of Chemical Physics

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“…The full sequence derivation of tRNAMet has been described elsewhere (15) (29). Mouse and chick tRNA t yield identical twodimensional oligonucleotide fingerprints and are probably identical in structure (15,20). Chick fibroblast, mouse ascites cell and avian RNA tumour virus tRNAMet species also behave identically as methionine donors in in vitro protein synthesis (11).…”

Section: Resultsmentioning

confidence: 99%

“…The differences between fingerprints of these two tRNAs can be explained by substituting six nucleotides of the tRNAMet sequence in the corresponding structure of tRNA t (Fig.4). Two of these differences amount to a replacement of nucleotides in loop regions (the substitution of an unidentified minor nucleoside, N for D (20) The unknown minor nucleoside N was identified only in tRNAMet and not in tRNA4 t, Its electrophoretic and chromatographic properties indicate that it does not correspond to any previously reported minor component of tRNA, and suggest that it is a derivative of uridine (10). In the pancreatic ribonuclease digest of tRNAMt, N was present in the tetra-nucleotide (A-G,G)Np, (p22), a fragment which appears to replace A-G-G-Dp (pl6) in the equivalent digest of tRNAMet (Table 2).…”

Section: Nucleic Acids Researchmentioning

confidence: 95%

“…The structures of tRNA3 t and tRNA4 t unfortunately give no indication as to why there might be a requirement for tRNAMet in RNA tumour viruses and why this requirement might not be fulfilled by the structurally similar tRNAMet In Rous sarcoma virus, tRNATrP, the other tRNA specifically bound by the transcriptase, is known to function as a primer molecule for transcriptase-catalysed RNA-dependent DNA synthesis (28,20). Although tRNAMet has no primer role in DNA synthesis, its 4 association with the transcriptase enzyme is possibly not a fortuitous occurrence.…”

Section: Nucleic Acids Researchmentioning

confidence: 99%

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Selection of methionine tRNAs by avian oncornaviruses

Piper

Elder

1978

Nucl Acids Res

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The free 4S RNA of avian RNA tumor viruses is greatly enriched in one of the four methionine tRNAs of the host cells, tRNA4Met. On the assumption that viral tRNAMet forms are identical to the corresponding tRNAs of mouse or chick cells, the following conclusions were drawn concerning the tRNAMet content of oncornaviruses: (1) tRNAMet species may be compartmentalised within the host cells, and the viral tRNA pool could reflect the cellular compartment in which viral maturation takes place since tRNAMet forms distribute unevenly between different fractions of a cell homogenate. (2) tRNA4Met appears to have no special role in the modulation of protein synthesis in as much as no functional difference between tRNA2Met and tRNA3Met, tRNA4Met could be demonstrated in in vitro protein synthesising systems. (3) tRNA4Met differs in nucleotide sequence from all other host cell tRNAMet forms except possibly tRNA2Met. The nucleotide sequences of two tRNAMet species, tRNA1Met and tRNA4Met, have already been determined and the sequence of another host cell tRNAMet, tRNA3Met, was derived from the analogy of its sequence to that of tRNA4Met since the two molecules differ in only 6 nucleotides out of 76. (4) Avian myeloblastosis virus reverse transcriptase has been shown to bind specifically tRNA4Met and tRNATrp in whole cell tRNA and therefore the free tRNA4Met in the virion particle may exist substantially bound to virion-associated transcriptase.

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