2,498 research outputs found
Building a cell and anatomy ontology of Caenorhabditis elegans
We are endowed with a rich knowledge about Caenorhabditis elegans. Its stereotyped anatomy and development has stimulated research and resulted in the accumulation of cell-based information concerning gene expression, and the role of specific cells in developmental signalling and behavioural circuits. To make the information more
accessible to sophisticated queries and automated retrieval systems, WormBase has begun to construct a C. elegans cell and anatomy ontology. Here we present our strategies and progress
Transmission of Renormalized Benzene Circuits
The renormalization equations emerge from a Greenian-matrix solution of the
discretized Schrodinger equation. A by-product of these equations is the
decimation process, which enables substituted-benzenes to be mapped onto
corresponding dimers, that are used to construct the series and parallel
circuits of single-, double- and triple-dimers. The transmittivities of these
circuits are calculated by the Lippmann-Schwinger theory, which yields the
transmission-energy function T(E). The average value of T(E) provides a measure
of the electron transport in the circuit in question. The undulating nature of
the T(E) profiles give rise to resonances (T=1) and anti-resonances (T=0)
across the energy spectrum. Analysis of the structure of the T(E) graphs
highlights the distinguishing features associated with the homo- and
hetero-geneous series and parallel circuits. Noteworthy results include the
preponderance of p-dimers in circuits with high T(E) values, and the fact that
parallel circuits tend to be better transmitters than their series
counterparts.Comment: 32 pages, 14 figures, 1 tabl
All for All
A review of Michael Ashburner's book Won for All: How the Drosophila Genome Was Sequenced
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