Výsledky vyhledávání - "R. J. Whitaker"

The stellar mass content of distant galaxy groups

Autor: R. J. Whitaker, David G. Gilbank, George Hau, John S. Mulchaey, Robert D. E. Henderson, Augustus Oemler, Michael L. Balogh, Raymond G. Carlberg, D. Wilman, Richard G. Bower, Simon L. Morris

We have obtained near-infrared imaging of 58 galaxy groups, in the redshift range 0.1
Comment: Accepted for publication in MNRAS. 13 pages mn2e style, with 11 figures and 4 tables

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c6d2df2679f05c5f39ad789a486fe6a

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Galaxy Groups at 0.3 <= z <= 0.55. II. Evolution to z ~ 0

Autor: Simon L. Morris, Michael L. Balogh, Vincent R. Eke, John S. Mulchaey, D. Wilman, A. Oemler, Richard G. Bower, Raymond G. Carlberg, R. J. Whitaker, Ian Lewis

We compare deep Magellan spectroscopy of 26 groups at 0.3 =5\AA) increases strongly with redshift, from ~29% in 2dFGRS to ~58% in CNOC2, for all galaxies brighter than ~ M*+1.75. This trend is parallel to the evolution of field galaxies, where the eq

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1d3ca176cfe66abf6cb5b93701b0232
http://arxiv.org/abs/astro-ph/0501183

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Galaxy Groups at 0.3 <= z <= 0.55. I. Group Properties

Autor: Richard G. Bower, R. J. Whitaker, A. Oemler Jnr, Raymond G. Carlberg, Michael L. Balogh, David J. Wilman, John S. Mulchaey, Simon L. Morris

The evolution of galaxies in groups may have important implications for the evolution of the star formation history of the universe, since many processes which operate in groups may suppress star formation and the fraction of galaxies in bound groups

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6409a58f53fa5435efe97121faa645cc
http://arxiv.org/abs/astro-ph/0501182

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Can a photometric redshift code reliably determine dust extinction?

Autor: T. Babbedge, Simon L. Morris, R. J. Whitaker

Photometric redshifts can be routinely obtained to accuracies of better than 0.1 in Delta(z)/(1+z). However, the issue of dust extinction is one that has still not been well quantified. In this paper the success of two template-fitting photometric re

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The Discovery of New Galaxy Members in the NGC 5044 and NGC 1052 Groups

Autor: R. J. Whitaker, David G. Barnes, N. P. F. McKay, Duncan A. Forbes, Paul Goudfrooij, Sarah Brough, Phil A. James, Carole Mundell, Vera Kozhurina-Platais

We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and evolution of galaxies in nearby groups. Two new group mem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::708e193921eb33a962ab0ba47895359e

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Glyphosate as a probe of the pentafunctional arom protein of Euglena gracilis

Autor: Graham S. Byng, Roy A. Jensen, R J Whitaker

Publikováno v: Canadian Journal of Botany. 63:1021-1024

Glyphosate (N-(phosphonomethyl)glycine) inhibited the growth of myxotrophically cultured Euglena gracilis. This inhibition was reversed by a combination of end products of the aromatic amino acid biosynthetic pathway, including the quantitatively min

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b624bf4b7d517b3fd70871be722912cd
https://doi.org/10.1139/b85-138

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The aromatic amino acid pathway branches at L-arogenate in Euglena gracilis

Autor: G S Byng, R J Whitaker, C L Shapiro, R A Jensen

Publikováno v: Molecular and Cellular Biology. 1:426-438

The recently characterized amino acid L-arogenate (Zamir et al., J. Am. Chem. Soc. 102:4499-4504, 1980) may be a precursor of either L-phenylalanine or L-tyrosine in nature. Euglena gracilis is the first example of an organism that uses L-arogenate a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7479e6e0853b4499cd081c7ed886d3fb
https://doi.org/10.1128/mcb.1.5.426

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Pseudomonas aeruginosa possesses two novel regulatory isozymes of 3-deoxy-D-arabino-heptulosonate 7-phosphate synthase

Autor: M J Fiske, R J Whitaker, Roy A. Jensen

Publikováno v: Journal of Biological Chemistry. 257:12789-12794

In Pseudomonas aeruginosa the initial enzyme of aromatic amino acid biosynthesis, 3-deoxy-D-arabinoheptulosonate 7-phosphate (DAHP) synthase, has been known to be subject to feedback inhibition by a metabolite in each of the three major pathway branc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::374c6013839cf27ea05480a7ac1e327c
https://doi.org/10.1016/s0021-9258(18)33582-8

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Enzymology of l-tyrosine biosynthesis in corn (zea ma ys)

Autor: R J Whitaker, Roy A. Jensen, Christopher E. Flick, Graham S. Byng

Publikováno v: Phytochemistry. 20:1289-1292

A newly found amino acid, denoted l -arogenate, has been identified as an intermediate in l -tyrosine biosynthesis in corn. Activity for prephena

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::35c96610b5275ea3c42440f3bb61f50a
https://doi.org/10.1016/0031-9422(81)80023-4

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