PAVELYEV Alexander

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Utilising the 15N dilution technique the relationship between the proportion of N derived from N2 fixation and relative abundance of ureides in xylem sap was evaluated for Phaseolus vulgaris L. cv. Mokcham during vegetative and reproductive development. In order to establish calibration curves for time integrated estimates of N2 fixation, plants were raised(More)
In recent years there has been increasing interest in applying magnetic resonance (MR) techniques in areas of engineering and chemical technology. The science that underpins many of these applications is the physics and chemistry of transport and reaction processes in porous materials. Key to the exploitation of MR methods will be our ability to demonstrate(More)
Magnetic resonance imaging (MRI) volume- and velocity-measurement techniques are used to probe structure-flow correlations within the interparticle space of a packed bed of ballotini. Images of the three mutually orthogonal components of the velocity field are obtained in axial and radial image slices within a bed of 5-mm-diameter ballotini, packed within a(More)
  • SHIDARA Hiroyuki . NAGASAKI Kazunobur, SAKAMOTO Kinzor, +16 authors OBIKI Tokuhirol
  • 2008
A 70 GHz electron cyclotron resonance heating (ECRH) system has been constructed in Heliotron J, a helical-axis heliotron device, in order to rcalize localized heating and current drive experiments. This ECRH system consists of a gyrotron, a matching optics unit (MOU), a waveguide transmission line with the HE,1 mode, polarizers, a barrier window and a(More)
Pulsed gradient stimulated echo (PGSTE) and microimaging nuclear magnetic resonance (NMR) are used to probe correlations between structure and flow in the void space of a model porous system formed from a packing of 1-mm diameter glass spheres. The pulsed gradient stimulated echo data determine the average propagator and permit the dispersion of the flow to(More)
Pyranosyl nucleotide analogues have been designed so that the intramolecular base to phosphorus distance closely approximates that of natural nucleotides. This was achieved by attaching the phosphorus directly at the anomeric position and the base at the 4-position of the carbohydrate. A series of compounds incorporating natural bases and having this novel(More)
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