Roberts, William
A Dictionary of Twentieth-Century Art
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1999
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© A Dictionary of Twentieth-Century Art 1999, originally published by Oxford University Press 1999. (Hide copyright information)
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Roberts, William (1895–1980). British painter, chiefly of figure compositions and portraits. He was born in London and had his main training at the Slade School, 1910–13. After travelling in France and Italy, he worked briefly for the
Omega Workshops, then in 1914 joined the Vorticist movement, signing the manifesto in the first number of
Blast. His style at this time showed his precocious response to French modernism and was close to that of
Bomberg in the way he depicted stiff, stylized figures through geometrically simplified forms. After the First World War (in which he served in the Royal Artillery and as an Official War Artist) his forms became rounder and fuller in a manner reminiscent of the ‘tubism’ of
Léger. Often his paintings showed groups of figures in everyday settings, his most famous work being
The Vorticists at the Restaurant de la Tour Eiffel: Spring 1915 (Tate Gallery, London, 1961–2), an imaginative reconstruction of his former colleagues celebrating at a favourite rendezvous to mark the publication of the first issue of
Blast. In response to the exhibition ‘ Wyndham
Lewis and the Vorticists’ at the Tate Gallery in 1956, Roberts wrote a series of pamphlets (1956–8) disputing Lewis's claim (in the catalogue introduction) that ‘Vorticism, in fact, was what I, personally, did, and said, at a certain period.’ However, on the occasion of the exhibition ‘Vorticism and its Allies’ at the Hayward Gallery in 1974, Roberts issued another pamphlet,
In Defence of English Cubists, in which he strangely contradicted his earlier statements, declaring that the term Vorticism ‘should only be used in reference to his [Lewis's] own work; and that the term Cubist should be employed to describe the abstract painting of his contemporaries of the 1914 period'. Roberts remained active as a painter as well as a controversialist, working until the day of his death.
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Myosin Cross-Bridge Kinetics and the Mechanism of Catch
Magazine article from: Biophysical Journal; 7/15/2007; ; 700+ words
; ...twitchin. The kinetic parameters of myosin cross-bridge turnover in permeabilized...determined by single turnover measurements on myosin-bound ADP. Under isometric conditions...Also, there is no measurable turnover of myosin-bound ADP during relaxation of catch...
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Myosin I contributes to the generation of resting cortical tension
Magazine article from: Biophysical Journal; 8/1/1999; ; 700+ words
; ABSTRACT The amoeboid myosin I's are required for cellular cortical functions...the actin-filled cortex of various Dictyostelium myosin I mutants. Given that the amoeboid myosin I's possess both actin- and membrane-binding domains...
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Myosin isoform shift does not significantly contribute to contractile deficit.
Newspaper article from: Clinical Trials Week; 4/28/2003; 686 words
; ...NewsRx.com & NewsRx.net) -- Myosin isoform shift does not significantly contribute...In non-failing human myocardium, V1 myosin comprises a small amount (<10%) of the total myosin content, whereas end-stage failing hearts...
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Myosin-Vb functions as a dynamic tether for peripheral endocytic compartments during transferrin trafficking.(Research article)
Magazine article from: BMC Cell Biology; 8/7/2008; ; 700+ words
; ...for unconventional myosins in higher eukaryotes...have shown that many myosin head domains bind...by unconventional myosins in a cellular context...to reposition the myosin in the absence or...to unconventional myosins, allowing us to...sensitized mutant myosin to actin by ...
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Myosin XI-K Is Required for Rapid Trafficking of Golgi Stacks, Peroxisomes, and Mitochondria in Leaf Cells of Nicotiana benthamiana1[W][OA]
Magazine article from: Plant Physiology; 3/1/2008; ; 700+ words
; ...of the tested six myosins appears to be involved...strongly suggest that myosin XI-K has a major...peroxisomes, whereas myosins XI-2 and XI-F...the identity of the myosin(s) involved remains unknown. Myosins are conserved molecular...
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Cardiac Myosin-Binding Protein C Modulates the Tuning of the Molecular Motor in the Heart
Magazine article from: Biophysical Journal; 7/15/2008; ; 700+ words
; ABSTRACT Cardiac myosin binding protein C (cMyBP-C) is an...contractility. Its precise effect on myosin cross-bridges (CBs) remains unclear...Huxley's equations. The probability of myosin being weakly bound to actin was higher...
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Kinaris Targeting Myosins with Allosteric Inhibitors.
Newspaper article from: BioWorld International; 9/9/2009; 700+ words
; ...tailored for individual myosin isoforms. Cytokinetics...Francisco, also is targeting myosins, but it is developing...In prostate cancer, myosin VI is an early marker...appears to be mediated by myosins IIA and IIB, although...disease, the role of myosin is more established...
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Two Class XI Myosins Function in Organelle Trafficking and Root Hair Development in Arabidopsis1[OA]
Magazine article from: Plant Physiology; 3/1/2008; ; 700+ words
; ...redundant nature of myosin function in plants. Myosins are signature molecular...all 13 class XI myosins of Arabidopsis to...in addition to myosin XI-K, myosin...specific to this myosin (Fig. 1C). Inactivation of Myosins XI-2 and XI...
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Multiple myosin motors and mechanoelectrical transduction by hair cells.(The Future of Aquatic Research in Space: Neurobiology, Cellular and Molecular Biology)
Magazine article from: The Biological Bulletin; 2/1/1997; ; 700+ words
; ...adaptation motors, which likely contain myosin molecules (reviewed in Hudspeth and Gillespie...prove that adaptation is carried out by myosin molecules and to identify the responsible...of the properties of skeletal-muscle myosin. We have applied general principles derived...
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Unconstrained Steps of Myosin VI Appear Longest among Known Molecular Motors
Magazine article from: Biophysical Journal; 6/1/2004; ; 700+ words
; ABSTRACT Myosin VI is a two-headed molecular...direction opposite to most other myosins. Previously, a single myosin VI molecule has been shown...Ali et al., 2002). Both myosin VI and V, like most other myosins, have two globular motor...
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myosin
Book article from: The Columbia Encyclopedia, Sixth Edition
myosin , one of the two major protein constituents...contraction of muscle. In muscle cells myosin is arranged in long filaments called thick...chemically link and unlink with those of myosin in a creeping or sliding action. The energy...
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Muscle
Book article from: Biology
...ends closer together. A thick filament is a bundle of approximately two hundred myosin proteins. A portion of each myosin protein projects outward to form myosin heads. Thin filaments overlap the thick filaments and are composed of three types...
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sliding filament theory
Book article from: A Dictionary of Biology
...muscle contraction in which the actin and myosin filaments of striated muscle slide over...the muscle fibres (see sarcomere ). Myosin-binding sites on the actin filaments...allows bridges to form between actin and myosin, which requires ATP as an energy source...
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Cytokinesis
Book article from: Biology
...similar to muscle. A molecular motor, myosin, contracts the actin filaments that form...proteins , including the molecular motor myosin, which powers contraction, also assemble...contractile ring. In this step, the myosin motor, powered by adenosine triphosphate...
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Muscle Spasms and Cramps
Encyclopedia entry from: Gale Encyclopedia of Children's Health: Infancy through Adolescence
...cell, causing the proteins (actin and myosin) to slide past one another. This motion...of calcium and unlinking of actin and myosin allow the muscle fiber to relax. Abnormal...recapture calcium and to unlink actin and myosin. Normally, sensations of pain and fatigue...
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