Search Results - (Author, Cooperation:S. J. Cook)

2015-10-16

Nature Publishing Group (NPG)

0028-0836

1476-4687

Biology

Chemistry and Pharmacology

Medicine

Natural Sciences in General

Physics

2016-04-23

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Animals ; B-Lymphocytes/*cytology ; Conserved Sequence ; Cyclins/metabolism ; G0 Phase/genetics/physiology ; G1 Phase/genetics/physiology ; Gene Expression Regulation ; Immunoglobulin mu-Chains/genetics ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Nuclear Proteins/genetics/*physiology ; Pre-B Cell Receptors ; RNA, Messenger/metabolism ; RNA-Binding Proteins/genetics/*physiology ; S Phase/genetics/*physiology ; Selection, Genetic ; Transcription, Genetic ; Tristetraprolin/genetics/*physiology ; V(D)J Recombination

1365-2494

Blackwell Publishing Journal Backfiles 1879-2005

Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Root competition was studied between seedlings of green panic (Panicum maximum var. trichoglume) and Heteropogon contortus in a native grassland sward clipped regularly to a height of 5·7 cm, and to which supplementary irrigation was applied. The influence of fertilizer addition and root competition from the grassland sward on seedling growth during the 42 days following emergence was determined. Root competition was excluded by steel tubes, or eliminated by killing the native sward with herbicides.Seedling growth was poor where neither root competition was controlled nor fertilizer was applied; at 42 days the seedlings were still less than 6 cm high with three leaves and one tiller. When root competition was controlled, either by steel tubes or herbicide, seedling growth increased significantly. Growth was greatest in the herbicide-treated plots where fertilizer was applied, seedlings at day 42 being 48 cm high with sixty-three leaves and nineteen tillers.Competition for nutrients appeared to be the primary factor limiting seedling growth and this was largely overcome by fertilizer application. Competition for nutrients appeared to increase the fertilizer requirements of pastures oversown into live swards compared with that of pastures oversown into herbicide-treated swards.

Electronic Resource

1365-2222

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Electronic Resource

1365-2222

Blackwell Publishing Journal Backfiles 1879-2005

Medicine

Electronic Resource

1433-299X

Formal algebraic specification ; Larch ; User interface ; Apple MacintoshTM Toolbox

Springer Online Journal Archives 1860-2000

Computer Science

Abstract The Macintosh™ Toolbox is a collection of resources, stored in ROM, of use to software developers building user interface components. This paper documents an attempt to specify one part of the Toolbox: namely the data types and routines for event-handling. The chief objective of the paper is to illustrate an approach to building a formal specification in which, starting from simple structures, the final specification is arrived at by a process of successive modifications, generalisations, instantiations and translations. The paper also constitutes an example of the Larch algebraic style, as well as the two-tiered approach characteristic of the Larch family of specification languages.

Electronic Resource

1432-2013

Key words Sodium ; Action potential ; Endocardial ; Epicardial

Springer Online Journal Archives 1860-2000

Medicine

Abstract  In this study we report measurements of the intracellular sodium concentration ([Na+]i) in cardiac myocytes isolated from sub-endocardial and sub-epicardial regions of the rabbit left ventricle. These measurements show that [Na+]i is significantly higher in sub-epicardial than in sub-endocardial myocytes both at rest and during steady-state stimulation at 0.5 Hz. During a 10-min rest the rate of fall of [Na+]i was identical in cells from the two regions but during post-rest recovery [Na+]i rose significantly faster in sub-endocardial cells. The effect that this difference in sodium regulation may have on the rate of recovery of the calcium transient post-rest is discussed. The steady-state differences in [Na+]i do not appear to have the effect on contraction we would expect i.e. steady-state contraction is larger in sub-endocardial cells where [Na+]i is lower. Changes in [Na+]i brought about by altering the frequency of stimulation are associated with the expected changes of contraction. Action potentials were found to be significantly longer in sub-endocardial cells and following rest action potential duration was shortened although regional differences were maintained. No regional differences in this effect of rest or in recovery of the action potential post-rest were found.

Electronic Resource

1572-9567

computer simulation ; laser annealing ; nonequilibrium molecular dynamics ; rapid solidification

Springer Online Journal Archives 1860-2000

Physics

Abstract A new nonequilibrium molecular dynamics computer simulation method has been developed for the study of rapid interface kinetics. In this method a strong heat gradient is set up to simulate the action of a laser in a (100) f.c.c. crystalline substrate composed of Lennard-Jones atoms. The substrate is shown to melt partially and then to regrow epitaxially as a crystalline solid. The characteristics of properties such as the melt depth as a function of time, together with the interface temperature and interface velocity as a function of time, are shown to display all the qualitative features of experimental studies of the laser annealing of silicon. The construction of the interface response function (interface velocity versus temperature) is also shown.

Electronic Resource