Institution
La Trobe University
Education•Melbourne, Victoria, Australia•
About: La Trobe University is a education organization based out in Melbourne, Victoria, Australia. It is known for research contribution in the topics: Population & Health care. The organization has 13370 authors who have published 41291 publications receiving 1138269 citations. The organization is also known as: LaTrobe University & LTU.
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TL;DR: It is proposed that under anaerobic conditions the Tetrasphaera-related PAOs take up glucose and ferment this to succinate and other components, and synthesize glycogen as a storage polymer, using energy generated from the degradation of stored polyphosphate and substrate fermentation.
Abstract: Members of the genus Tetrasphaera are considered to be putative polyphosphate accumulating organisms (PAOs) in enhanced biological phosphorus removal (EBPR) from wastewater. Although abundant in Danish full-scale wastewater EBPR plants, how similar their ecophysiology is to 'Candidatus Accumulibacter phosphatis' is unclear, although they may occupy different ecological niches in EBPR communities. The genomes of four Tetrasphaera isolates (T. australiensis, T. japonica, T. elongata and T. jenkinsii) were sequenced and annotated, and the data used to construct metabolic models. These models incorporate central aspects of carbon and phosphorus metabolism critical to understanding their behavior under the alternating anaerobic/aerobic conditions encountered in EBPR systems. Key features of these metabolic pathways were investigated in pure cultures, although poor growth limited their analyses to T. japonica and T. elongata. Based on the models, we propose that under anaerobic conditions the Tetrasphaera-related PAOs take up glucose and ferment this to succinate and other components. They also synthesize glycogen as a storage polymer, using energy generated from the degradation of stored polyphosphate and substrate fermentation. During the aerobic phase, the stored glycogen is catabolized to provide energy for growth and to replenish the intracellular polyphosphate reserves needed for subsequent anaerobic metabolism. They are also able to denitrify. This physiology is markedly different to that displayed by 'Candidatus Accumulibacter phosphatis', and reveals Tetrasphaera populations to be unusual and physiologically versatile PAOs carrying out denitrification, fermentation and polyphosphate accumulation.
184 citations
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TL;DR: An integrated approach to gene identification offers promise for identifying other unknown causes of respiratory chain disorders.
Abstract: Complex I deficiency, the most common respiratory chain defect, is genetically heterogeneous: mutations in 8 nuclear and 7 mitochondrial DNA genes encoding complex I subunits have been described. However, these genes account for disease in only a minority of complex I–deficient patients. We investigated whether there may be an unknown common gene by performing functional complementation analysis of cell lines from 10 unrelated patients. Two of the patients were found to have mitochondrial DNA mutations. The other 8 represented 7 different (nuclear) complementation groups, all but 1 of which showed abnormalities of complex I assembly. It is thus unlikely that any one unknown gene accounts for a large proportion of complex I cases. The 2 patients sharing a nuclear complementation group had a similar abnormal complex I assembly profile and were studied further by homozygosity mapping, chromosome transfers, and microarray expression analysis. NDUFS6, a complex I subunit gene not previously associated with complex I deficiency, was grossly underexpressed in the 2 patient cell lines. Both patients had homozygous mutations in this gene, one causing a splicing abnormality and the other a large deletion. This integrated approach to gene identification offers promise for identifying other unknown causes of respiratory chain disorders.
184 citations
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TL;DR: In this paper, the authors conceptualized how future changes in corporate social disclosure (CSD), aimed at improving accountability for corporate performance to key stakeholder groups, might be brought about.
Abstract: Purpose – The purpose of this paper is to conceptualise how future changes in corporate social disclosure (CSD), aimed at improving accountability for corporate performance to key stakeholder groups, might be brought about.Design/methodology/approach – Drawing on the work of the Austrian economist Ludwig von Mises with respect to human (and organisational) action and the work of Leon Festinger and Kurt Lewin with respect to human (and organisational) change, the paper examines how academics and other corporate stakeholders might effect changes in CSD.Findings – Managers act in a way which maximises their formal happiness (from von Mises) and change occurs following the creation of cognitive dissonance (Festinger) which leads to “unfreezing” (Lewin). Stakeholders can effect change by creating cognitive dissonance. With specific reference to Anglo‐American limited liability and publicly traded corporations, such cognitive dissonance and unfreezing normally involves a perceived threat to profitability.Resear...
184 citations
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TL;DR: The results strongly suggest that the psychological and interpersonal difficulties participants were suffering at the time of interview were the legacy of their adverse experiences while detained, which resulted in long-term psychological harm.
184 citations
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TL;DR: In this paper, the role of the dihydropyridine receptors (DHPR) as Ca2+ channels and voltage-sensors in the sarcoplasmic reticulum (SR) of skeletal muscle is discussed.
Abstract: 1. The present review describes the mechanisms involved in controlling Ca2+ release from the sarcoplasmic reticulum (SR) of skeletal muscle, which ultimately regulates contraction. 2. Comparisons are made between cardiac and skeletal muscle with respect to: (i) the role of the dihydropyridine receptors (DHPR) as Ca2+ channels and voltage-sensors; (ii) the regulation of the ryanodine receptor (RyR)/Ca2+-release channels in the SR; and (iii) the importance of Ca2+-induced Ca2+ release. 3. It is shown that the key differences of the skeletal muscle Ca2+-release channel (RyR1), namely the increase in its stimulation by ATP and its inhibition by Mg2+, are critical for its direct regulation by the associated DHPR and, consequently, for the fast, accurate control of skeletal muscle contraction.
184 citations
Authors
Showing all 13601 results
Name | H-index | Papers | Citations |
---|---|---|---|
Rasmus Nielsen | 135 | 556 | 84898 |
C. N. R. Rao | 133 | 1646 | 86718 |
James Whelan | 128 | 786 | 89180 |
Jacqueline Batley | 119 | 1212 | 68752 |
Eske Willerslev | 115 | 367 | 43039 |
Jonathan E. Shaw | 114 | 629 | 108114 |
Ary A. Hoffmann | 113 | 907 | 55354 |
Mike Clarke | 113 | 1037 | 164328 |
Richard J. Simpson | 113 | 850 | 59378 |
Alan F. Cowman | 111 | 379 | 38240 |
David C. Page | 110 | 509 | 44119 |
Richard Gray | 109 | 808 | 78580 |
David S. Wishart | 108 | 523 | 76652 |
Alan G. Marshall | 107 | 1060 | 46904 |
David A. Williams | 106 | 633 | 42058 |