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Selected Works

2005

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Articles 91 - 101 of 101

Full-Text Articles in Life Sciences

Darwinisms’S Multiple Ontologies, David J. Depew Dec 2004

Darwinisms’S Multiple Ontologies, David J. Depew

David J Depew

No abstract provided.

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Classical Conditioning Of Red-Backed Salamanders, Plethodon Cinereus, Scott Kight Dec 2004

Classical Conditioning Of Red-Backed Salamanders, Plethodon Cinereus, Scott Kight

Scott Kight


We examined associative learning as it relates to the sensory ecology of the red-backed salamander, Plethodon cinereus, using a classical conditioning design to evaluate the response of salamanders to different kinds of stimuli.  Conditioned stimuli (CS) reflected visual, chemosensory, and mechanosensory modalities of P. cinereus, with brief exposures to (I) white light, (II) acetic acid fumes, (III) low-frequency sound, and (IV) low-frequency vibration.  In all experiments, a gentle mechanical stimulation of the tail served as the unconditioned stimulus (US), which consistently elicited movement of the head or body as the unconditioned response (UR).  For two days, the US …

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The Framing Effect And Risky Decisions: Examining Cognitive Functions With Fmri, Cleotilde Gonzalez, Jason Dana, Hideya Koshino, Marcel Adam Just Dec 2004

The Framing Effect And Risky Decisions: Examining Cognitive Functions With Fmri, Cleotilde Gonzalez, Jason Dana, Hideya Koshino, Marcel Adam Just

Marcel Adam Just

No abstract provided.

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Yeast Puf3 Mutants Reveal The Complexity Of Puf-Rna Binding And Identify A Loop Required For Regulation Of Mrna Decay, Wendy Olivas, S. S. Houshmandi Dec 2004

Yeast Puf3 Mutants Reveal The Complexity Of Puf-Rna Binding And Identify A Loop Required For Regulation Of Mrna Decay, Wendy Olivas, S. S. Houshmandi

Wendy Olivas

The eukaryotic Puf proteins regulate mRNA translation and degradation by binding the 3' untranslated regions of target mRNAs. Crystal structure analysis of a human Puf bound to RNA suggested a modular mode of binding, with specific amino acids within each of eight repeat domains contacting a single nucleotide of the target RNA. Here we study the mechanism by which the yeast Puf3p binds and stimulates the degradation of COX17 mRNA. Mutation of the predicted RNA-binding positions of Puf3p to those found in Puf5p demonstrated that a single amino acid change in Puf3p abolished detectable binding to COX17. Since this amino …

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Profiling Condition-Specific, Genome-Wide Regulation Of Mrna Stability In Yeast, Wendy Olivas, B. C. Foat, S. S. Houshmandi, H. J. Bussemaker Dec 2004

Profiling Condition-Specific, Genome-Wide Regulation Of Mrna Stability In Yeast, Wendy Olivas, B. C. Foat, S. S. Houshmandi, H. J. Bussemaker

Wendy Olivas

The steady-state abundance of an mRNA is determined by the balance between transcription and decay. Although regulation of transcription has been well studied both experimentally and computationally, regulation of transcript stability has received little attention. We developed an algorithm, MatrixREDUCE, that discovers the position-specific affinity matrices for unknown RNA-binding factors and infers their condition-specific activities, using only genomic sequence data and steady-state mRNA expression data as input. We identified and computationally characterized the binding sites for six mRNA stability regulators in Saccharomyces cerevisiae, which include two members of the Pumilio-homology domain (Puf) family of RNA-binding proteins, Puf3p and Puf4p. We …

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Plant Ontology (Po): A Controlled Vocabulary Of Plant Structures And Growth Stages, Pankaj Jaiswal, Shulamit Avraham, Katica Ilic, Elizabeth A. Kellogg, Susan Mccouch, Anuradha Pujar, Leonore Reiser, Seung Y. Rhee, Martin M. Sachs, Mary L. Schaeffer, Lincoln Stein, Peter Stevens, Leszek Vincent, Doreen Ware, Felipe Zapata Dec 2004

Plant Ontology (Po): A Controlled Vocabulary Of Plant Structures And Growth Stages, Pankaj Jaiswal, Shulamit Avraham, Katica Ilic, Elizabeth A. Kellogg, Susan Mccouch, Anuradha Pujar, Leonore Reiser, Seung Y. Rhee, Martin M. Sachs, Mary L. Schaeffer, Lincoln Stein, Peter Stevens, Leszek Vincent, Doreen Ware, Felipe Zapata

Peter Stevens

The Plant Ontology Consortium (POC) (www.plantontology.org) is a collaborative effort among several plant databases and experts in plant systematics, botany and genomics. A primary goal of the POC is to develop simple yet robust and extensible controlled vocabularies that accurately reflect the biology of plant structures and developmental stages. These provide a network of vocabularies linked by relationships (ontology) to facilitate queries that cut across datasets within a database or between multiple databases. The current version of the ontology integrates diverse vocabularies used to describe Arabidopsis, maize and rice (Oryza sp.) anatomy, morphology and growth stages. Using the ontology browser, …

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Computational Technique For Flow In Blood Vessels With Porous Effects, Dr. Anil Kumar Dec 2004

Computational Technique For Flow In Blood Vessels With Porous Effects, Dr. Anil Kumar

Dr. Anil Kumar

A finite element solution for the Navier-Stokes equations for steady flow under the porosity effects through a double branched two-dimensional section of a threedimensional model of a canine aorta was obtained. The numerical solution involves transforming a physical coordinates to a curvilinear boundary fitted coordinate system. The steady flow, branch flow and shear stress under the porous effects were discussed in detail. The shear stress at the wall was calculated for Reynolds number of 1 000 with branch to main aortic flow rate ratio as a parameter. The results are compared with earlier works involving experimental data and it has …

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Poor Taxon Sampling, Poor Character Sampling, And Non-Repeatable Analyses Of A Contrived Dataset Do Not Provide A More Credible Estimate Of Insect Phylogeny: A Reply To Kjer., T. Heath Ogden Dec 2004

Poor Taxon Sampling, Poor Character Sampling, And Non-Repeatable Analyses Of A Contrived Dataset Do Not Provide A More Credible Estimate Of Insect Phylogeny: A Reply To Kjer., T. Heath Ogden

T. Heath Ogden

The wealth of data available for phylogenetic analysis of the insect orders, from both morphological and molecular sources, is steadily increasing. However, controversy exists among the methodologies one can use to reconstruct ordinal relationships. Recently, Kjer (2004) presented an analysis of insect ordinal relationships based exclusively on a single source of information: 18S rDNA sequence data. Kjer claims that his analysis resulted in a more ‘‘credible’’ phylogeny for the insect orders and strongly criticized our previous phylogenetic results. However, Kjer only used a subset of the data that are currently available for insect ordinal phylogeny, misrepresented our analyses, and omitted …

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Phylogeny Of Ephemeroptera (Mayflies) Based On Molecular Evidence, T. Heath Ogden Dec 2004

Phylogeny Of Ephemeroptera (Mayflies) Based On Molecular Evidence, T. Heath Ogden

T. Heath Ogden

This study represents the Wrst molecular phylogeny for the Order Ephemeroptera. The analyses included 31 of the 37 families, representing »24% of the genera. Fifteen families were supported as being monophyletic, Wve families were supported as nonmonophyletic, and 11 families were only represented by one species, and monophyly was not testable. The suborders Furcatergalia and Carapacea were supported as monophyletic while Setisura and Pisciforma were not supported as monophyletic. The superfamilies Ephemerelloidea and Caenoidea were supported as monophyletic while Baetoidea, Siphlonuroidea, Ephemeroidea, and Heptagenioidea were not. Baetidae was recovered as sister to the remaining clades. The mayXy gill to wing …

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Spiroplasma Atrichopogonis Sp. Nov., From A Ceratopogonid Biting Midge, R. Thomas Koerber, Gail E. Gasparich, Mark F. Frana, William L. Grogan Dec 2004

Spiroplasma Atrichopogonis Sp. Nov., From A Ceratopogonid Biting Midge, R. Thomas Koerber, Gail E. Gasparich, Mark F. Frana, William L. Grogan

Gail Gasparich

Spiroplasma sp. strain GNAT3597T was isolated from the biting midge genus Atrichopogon (Diptera: Ceratopogonidae). It was serologically distinct from other Spiroplasma species, groups or subgroups. Dark-field microscopy of the cells revealed the classical helical shape and subsequent transmission electron microscopy revealed cells surrounded by only a cell membrane (i.e. lacking a cell wall). Growth of strain GNAT3597T occurred in M1D medium at 30 °C. Strain GNAT3597T catabolized both glucose and arginine, but did not hydrolyse urea. The DNA G+C content of strain GNAT3597T was 29±1 mol%. Only one strain, SMCAT (Spiroplasma mirum), is serologically related to strain GNAT3597T, although the …

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“El Tjce Confirma Su Jurisprudencia Favorable A Las Alegaciones Relativas A La Salud En El Etiquetado De Los Productos Alimenticios: La Sentencia 'Dyna Svelte Café'”, Luis González Vaqué Dec 2004

“El Tjce Confirma Su Jurisprudencia Favorable A Las Alegaciones Relativas A La Salud En El Etiquetado De Los Productos Alimenticios: La Sentencia 'Dyna Svelte Café'”, Luis González Vaqué

Luis González Vaqué

No abstract provided.

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