Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Lionel G. Harrison"'
Autor:
Lionel G. Harrison
Biological development, how organisms acquire their form, is one of the great frontiers in science. While a vast knowledge of the molecules involved in development has been gained in recent decades, big questions remain on the molecular organization
Publikováno v:
Biosystems. 109:488-497
With their continuous growth, understanding how plant shapes form is fundamentally linked to understanding how growth rates are controlled across different regions of the plant. Much of a plant's architecture is generated in shoots and roots, where f
Autor:
Garnet Martens, Elaine Humphrey, Lionel G. Harrison, Begonia Silva-Moreno, Juan Ausió, Harold E. Kasinsky
Publikováno v:
Journal of Cellular Biochemistry. 108:1399-1409
In this study, we present for the first time a description of the dynamic chromatin changes that occur during spermiogenesis in the internally fertilizing caenogastropod mollusc Nucella lamellosa. Chromatin condensation in developing sperm cells in s
Publikováno v:
Journal of Experimental Zoology Part A: Comparative Experimental Biology. :76-92
During spermiogenesis in some internally fertilizing molluscs and insects, the post-meiotic spermatid nucleus develops via a sequence of complex patterns of the nuclear contents (chromatin and nucleoplasm) on the way to final chromatin condensation.
Publikováno v:
Bulletin of Mathematical Biology. 65:571-607
We study two chemical models for pattern formation in growing plant tips. For hemisphere radius and parameter values together optimal for spherical surface harmonic patterns of index l = 3, the Brusselator model gives an 84% probability of dichotomou
Publikováno v:
Europe PubMed Central
Scopus-Elsevier
Scopus-Elsevier
Reaction–diffusion theory for pattern formation is considered in relation to processes of biological development in which there is continuous growth and shape change as each new pattern forms. This is particularly common in the plant kingdom, for b
Autor:
Lionel G. Harrison, David M. Holloway
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences. 354:417-433
Semi–cell morphogenesis in unicellular desmid algae of the genusMicrasteriasgenerates a stellar shape by repeated dichotomous branching of growing tips of the cell surface. The numerous species of the genus display variations of the branching patte
Autor:
I. Setyawati, Lionel G. Harrison, W. Lau, G. Donaldson, S. Lohachitranont, J. Yue, B. P. Lin, M. Lee
Publikováno v:
Protoplasma. 196:190-196
The spacing between adjacent hairs in vegetative whorls ofAcetabularia acetabulum (formerlyA. mediterranea) was earlier reported as being quantitatively responsive to calcium ion concentration in the culture medium. We here report a quantitative resp
Autor:
David M. Holloway, Lionel G. Harrison
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 222:210-233
The present work is concerned with two aspects of pattern formation: pattern localization and degree of pattern order. In reaction-diffusion models, there are three major effects. These stem from the reaction terms, the diffusion terms and the presen
Publikováno v:
Applied Organometallic Chemistry. 8:313-324
Polyphysa peniculus was grown in artificial seawater in the presence of arsenate, arsenite, monomethylarsonate and dimethylarsinic acid. The separation and identification of some of the arsenic species produced in the cells as well as in the growth m