Institution
Australian National University
Education•Canberra, Australian Capital Territory, Australia•
About: Australian National University is a education organization based out in Canberra, Australian Capital Territory, Australia. It is known for research contribution in the topics: Population & Galaxy. The organization has 34419 authors who have published 109261 publications receiving 4315448 citations. The organization is also known as: The Australian National University & ANU.
Topics: Population, Galaxy, Stars, Zircon, Politics
Papers published on a yearly basis
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TL;DR: In this paper, the equilibrium between spinel lherzolite and garnet lhersolite has been experimentally determined in the CaO-MgO-Al2O3-SiO2 system between 800° and 1,100° C.
Abstract: The equilibrium between spinel lherzolite and garnet lherzolite has been experimentally determined in the CaO-MgO-Al2O3-SiO2 system between 800° and 1,100° C. In confirmation of earlier work and predictions from thermodynamic data, it was found that theP-T slope of the reaction was close to zero, the equilibrium ranging from 16.1 kb at 800° C to 18.7 kb at 1,100° C (±0.3 kb).
480 citations
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TL;DR: By reducing purified pteroylglutamate with sodium dithionite according to the method of Futterman and twice precipitating the product by slow adjustment of the pH, it has now been found possible to obtain dihydropteroy lglutamic acid consistently as a white crystalline product giving analytical results agreeing fairly well with the theoretical values.
Abstract: THE preparation of dihydropteroylglutamic acid has previously been described by O'Dell et al., who used catalytic hydrogenation of pteroylglutamate1, and by Futterman, who carried out the reduction with sodium dithionite2. The acid prepared by catalytic hydrogenation is unsuitable for many biochemical studies, however, because it contains traces of tetra-hydropteroylglutamic acid3. The material obtained by the method of Futterman is an amorphous discoloured preparation2, but was found to be uncontaminated by tetrahydropteroylglutamic acid3. No analytical figures have been given for this material. By reducing purified pteroylglutamate with sodium dithionite according to the method of Futterman and twice precipitating the product by slow adjustment of the pH. between strictly defined values, it has now been found possible to obtain dihydropteroylglutamic acid consistently as a white crystalline product giving analytical results agreeing fairly well with the theoretical values.
479 citations
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01 Oct 2006
TL;DR: Guimond et al. as mentioned in this paper used a symmetric average model in which both hemispheres are equally represented and thus left-right comparison is possible. But, the asymmetry of the human cortex requires that both left and right models of a structure be composed in order to effectively segment the desired structures.
Abstract: In model-based segmentation, automated region identification is achieved via registration of novel data to a pre-determined model The desired structure is typically generated via manual tracing within this model When model-based segmentation is applied to human cortical data, problems arise if left-right comparisons are desired The asymmetry of the human cortex requires that both left and right models of a structure be composed in order to effectively segment the desired structures Paradoxically, defining a model in both hemi-spheres carries a likelihood of introducing bias to one of the structures This paper describes a novel technique for creating a symmetric average model in which both hemispheres are equally represented and thus left-right comparison is possible This work is an extension of that proposed by Guimond et al [1] Hippocampal segmentation is used as a test-case in a cohort of 118 normal eld-erly subjects and results are compared with expert manual tracing
478 citations
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TL;DR: In this article, a Cenozoic tectonic reconstruction is presented for the Southwest Pacific region located east of Australia, constrained by large geological and geophysical datasets and recalculated rotation parameters for Pacific-Australia and Lord Howe Rise-Pacific relative plate motion.
478 citations
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TL;DR: The hypothesis that LCOs and chitin oligosaccharides act by perturbing the auxin flow in the root during the earliest stages of nodule formation is supported, and it is shown that endogenous flavonoids could mediate this response.
Abstract: The expression of the auxin responsive reporter construct, GH3:gusA, was examined in transgenic white clover plants to assess changes in the auxin balance during the earliest stages of root nodule formation. Reporter gene expression was monitored at marked locations after the application of bacteria or signal molecules using two precise inoculation techniques: spot-inoculation and a novel method for ballistic microtargeting. Changes in GH3:gusA expression were monitored after the inoculation of Rhizobium leguminosarum biovar trifolii, non-host rhizobia, lipo-chitin oligosaccharides (LCOs), chitin oligosaccharides, a synthetic auxin transport inhibitor (naphthylphthalamic acid; NPA), auxin, the ENOD40-1 peptide or different flavonoids. The results show that clover-nodulating rhizobia induce a rapid, transient and local downregulation of GH3:gusA expression during nodule initiation followed by an upregulation of reporter gene expression at the site of nodule initiation. Microtargeting of auxin caused a local and acropetal upregulation of GH3:gusA expression, whereas NPA caused local and acropetal downregulation of expression. Both spot-inoculation and microtargeting of R. l. bv. trifolii LCOs or flavonoid aglycones induced similar changes to GH3:gusA expression as NPA. O-acetylated chitin oligosaccharides caused similar changes to GH3:gusA expression as R. l. bv. trifolii spot-inoculation, but only after delivery by microtargeting. Non-O-acetylated chitin oligosaccharides, flavonoid glucosides or the ENOD40-1 peptide failed to induce any detectable changes in GH3:gusA expression. GH3:gusA expression patterns during the later stages of nodule and lateral root development were similar. These results support the hypothesis that LCOs and chitin oligosaccharides act by perturbing the auxin flow in the root during the earliest stages of nodule formation, and that endogenous flavonoids could mediate this response.
478 citations
Authors
Showing all 34925 results
Name | H-index | Papers | Citations |
---|---|---|---|
Cyrus Cooper | 204 | 1869 | 206782 |
Nicholas G. Martin | 192 | 1770 | 161952 |
David R. Williams | 178 | 2034 | 138789 |
Krzysztof Matyjaszewski | 169 | 1431 | 128585 |
Anton M. Koekemoer | 168 | 1127 | 106796 |
Robert G. Webster | 158 | 843 | 90776 |
Ashok Kumar | 151 | 5654 | 164086 |
Andrew White | 149 | 1494 | 113874 |
Bernhard Schölkopf | 148 | 1092 | 149492 |
Paul Mitchell | 146 | 1378 | 95659 |
Liming Dai | 141 | 781 | 82937 |
Thomas J. Smith | 140 | 1775 | 113919 |
Michael J. Keating | 140 | 1169 | 76353 |
Joss Bland-Hawthorn | 136 | 1114 | 77593 |
Harold A. Mooney | 135 | 450 | 100404 |