Dylan Gray

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Uniformly 14C-labelled primary cell walls (14C-PCW) were purified from suspension-cultured cells of spinach (Spinacia oleracea L.) grown in a medium containing D-[U-14C]glucose. The approximate polymer composition of the 14C-PCW preparation (% total 14C) was homogalacturonan 30, rhamnogalacturonan 23, xyloglucan 10, other hemicelluloses 3, cellulose 21,(More)
A 14C-labelled plant cell wall preparation (14C-PCW) produced from spinach (Spinacia oleracea L.) cell culture exhibits uniform labelling of the major polysaccharide groups (%): pectins 53, hemicellulose 13, cellulose 21, starch 3. This 14C-PCW preparation has been used in rat studies as a marker for plant cell wall metabolism. Metabolism of the 14C-PCW(More)
  • E. Puzeras, G. Tautvaišienė, +4 authors Y. Chorniy
  • 2010
The main atmospheric parameters and abundances of the iron-group elements (vanadium, chromium, iron, cobalt and nickel) are determined for 62 red giant ‘clump’ stars revealed in the Galactic field by the Hipparcos orbiting observatory. The stars form a homogeneous sample with the mean value of temperature Teff = 4750 ± 160 K, of surface gravity log g = 2.41(More)
Given that the exact answer to a question is fixed, we ask is it possible to strengthen the privacy by increasing the crowd size that participates even though they do not contribute to the exact answer? In this paper, we introduce the notion of scalable privacy whereby data owners not at a particular location privatize their response such that they respond(More)
We discuss the way of increasing of the number of chemical elements, investigated in stellar spectra. We can reach it by using spectrum synthesis method, new atomic data and observation of stellar spectra with resolution comparable to solar spectral atlases. We show two examples of this kind researches. The first is the implementation of new atomic data to(More)
The mechanism responsible for driving the ubiquitous winds of cool giant and supergiant stars remains to be established. To this end, we are constructing semi-empirical models of the extended outer atmospheres ('chromospheres') and winds of selected red supergiants. These models are constrained by analyses of the UV line spectra of single stars, and of red(More)
We present an extended theoretical library of over 800 synthetic stellar spectra, covering energy distribution in the optical range (λ = 3500 − 7000 Å), at inverse resolution R=500 000. The library, based on the ATLAS 9 model atmospheres, has been computed with the SYNTHE code developed by R. L. Kurucz. The grid spans a large volume in the fundamental(More)