UScholar Works
 
Filters: Date: "2005" Department: "Biology" Collection: "ir_uspace"
1 - 25 of 20
Number of results to display per page
CreatorTitleDescriptionSubjectDate
1 Beckerle, Mary C.Atrial natriuretic peptide promotes cardiomyocyte survival by cGMP-dependent nuclear accumulation of zyxin and AktThis study delineates a mechanism for antiapoptotic signaling initiated by atrial natriuretic peptide (ANP) stimulation leading to elevation of cGMP levels and subsequent nuclear accumulation of Akt kinase associated with zyxin, a cytoskeletal LIM-domain protein. Nuclear targeting of zyxin induces r...Zyxin; Akt; Cyclic guanosine monophosphate2005
2 Davidson, Diane W.Cecropia and its biotic defensesIn all the world, the genus Cecropia is unrivaled for the number of myrmecophytes, or true "antplants" counted among its species (McKey & Davidson, 1993). Based on the proportion of Cecropia species producing Mullerian bodies in at least some parts of their distribution, myrmecophytes comprise the ...Myrmecophytes; Mullerian bodies; Pearl bodies2005
3 Coley, Phyllis D.; Lokvam, John; Kursar, Thomas A.Divergent defensive strategies of young leaves in two species of IngaIn the recently radiated genus Inga (Fabaceae), few nucleotide substitutions have accumulated among species, yet large divergences have occurred in defensive phenotypes, suggesting strong selection by herbivores. We compared herbivory and defenses of young leaves for I. goldmanii, a more derived spe...Bioassays; Flavanoids; Heliothis virescens; Herbivory; Inga goldmanii; Inga umbellifera; Leaf development; Non-protein amino acids; Phoebis philea2005
4 Hultine, KevinEcohydrological implications of woody plant encroachmentIncreases in the abundance or density of woody plants in historically semiarid and arid grassland ecosystems have important ecological, hydrological, and socioeconomic implications. Using a simplified water-balance model, we propose a framework for conceptualizing how woody plant encroachment is li...Carbon cycling; ecohydrology; evapotranspiration2005
5 Ehleringer, James R.; Bush, Sarah Elizabeth; Solomon, Douglas KipEcohydrology in a Colorado River riparian forest: implications for the decline of Populus fremontiiPopulus fremontii (Fremont cottonwood) was once a dominant species in desert riparian forests but has been increasingly replaced by the exotic invasive Tamarix ramosissima (saltcedar). Interspecific competition, reduced flooding frequency, and increased salinity have been implicated in the widespre...Populus fremontii; Decline; Colorado River; Utah; Invasive species; Riparian; Salinity; Sap flow; Tamarix ramosissima; Transpiration2005
6 Sperry, John S.Embolized conduits of rice (Oryza sativa, poaceae) refill despite negative xylem pressureEmbolism reversal in rice plants was studied by testing the plant's ability to refill embolized conduits while xylem pressures were substantially negative. Intact, potted plants were water-stressed to a xylem pressure of -1.88 + 0.1 MPa and a 66.3 + 3.8% loss of xylem conductivity (PLC) by cavitatio...Embolism; novel revilling; Oryza2005
7 Sperry, John S.Evaluation of Murray's law in Psilotum nudum (Psilotaceae), an analogue of ancestral vascular plantsPrevious work has shown that the xylem of seed plants follows Murray's law when conduits do not provide structural support to the plant. Here, compliance with Murray's law was tested in the stem photosynthesizer Psilotum nudum, a seedless vascular plant. Psilotum nudum was chosen because the central...Conduit furcation number; hydraulic architecture; Murray's law2005
8 Bohs, Lynn A.Four-gene study of evolutionary relationships in Solanum section AcanthophoraThe "spiny solanums," Solanum subgenus Leptostemonum (Solanaceae), comprise a large lineage with over 350 species and include the cultivated eggplant, Solanum melongena. Despite the importance of this subgenus, phylogenetic relationships among these taxa are currently unclear. The present research...Acanthophora; Granule-bound starch synthase gene; GBSSI; ITS; Internal transcribed spacer; Solanum; trnS-trnG; trnT-trnF; Waxy2005
9 Olivera, Baldomero M.Identification of a novel pharmacophore for peptide toxins interacting with K+ channelsқM-conotoxin RIIIK blocks TSha1 K+ channels from trout with high affinity by interacting with the ion channel pore. As opposed to many other peptides targeting K+ channels, қM-RIIIK does not possess a functional dyad. In this study we combine thermodynamic mutant cycle analysis and docking calc...Conotoxins; Peptide toxins; қM-conotoxin RIIIK; Pharmacophore2005
10 Adler, Frederick R.; Carrier, David R.Interaction between the X chromosome and an autosome regulates size sexual dimorphism in Portuguese Water DogsSize sexual dimorphism occurs in almost all mammals. In Portuguese Water Dogs, much of the difference in skeletal size between females and males is due to the interaction between a Quantitative Trait Locus (QTL) on the X-chromosome and a QTL linked to Insulin-like Growth Factor 1 (IGF-1) on the CFA...Phenotypes; QTL; Selection2005
11 Bohs, Lynn A.Major clades in Solanum based on ndhF sequence dataAnalysis of sequence data from the chloropiast gene ndhF identifies at least 12 major well-supported clades within the genus Solanum. These are briefly described, given informal clade names, and compared with the groups recognized by previous Solanum workers. Non-molecular synapomorphies are propos...Solanum; ndhF2005
12 Beckerle, Mary C.; Yoshigi, Masaaki; Hoffman, Laura M.; Yost, H. JosephMechanical force mobilizes zyxin from focal adhesions to actin filaments and regulates cytoskeletal reinforcementOrgans and tissues adapt to acute or chronic mechanical stress by remodeling their actin cytoskeletons. Cells that are stimulated by cyclic stretch or shear stress in vitro undergo bimodal cytoskeletal responses that include rapid reinforcement and gradual reorientation of actin stress fibers; howev...Zyxin; Actin2005
13 Ehleringer, James R.Oxygen isotope ratios of waters and respired CO2 in Amazonian forest and pasture ecosystemsThe oxygen isotope ratio (d18O, SMOW) of atmospheric CO2 is a powerful indicator of large-scale CO2 exchange on land. Oxygen isotopic exchange between CO2 and water in leaves and soils controls the d18O of atmospheric CO2. Currently there is little empirical information on the spatial and temporal ...Amazonia; Carbon dioxide (CO2); Oxygen isotope ratio; Photosynthesis; Respiration; Stable isotope ratio; Tropical forests2005
14 Olivera, Baldomero M.; Yoshikami, Doju; Bulaj, GrzegorzPost-translational amino acid isomerization: a functionally important D-amino acid in an excitatory peptideThe post-translational modification of an L- to a D-amino acid has been documented in relatively few gene products, mostly in small peptides under 10 amino acids in length. In this report, we demonstrate that a 46-amino acid polypeptide toxin has one D-phenylalanine at position 44, and that the ...D-amino acid; Excitatory peptides; Conotoxins2005
15 Adler, Frederick R.Recent rapid increases in the right whale (Eubalaena australis) population off southern BrazilRight whales (Eubalaena australis) that gather on a wintering ground off southern Brazil have been aerial surveyed and photographically identified since 1987. As of 2003 the Brazilian Right Whale Catalogue has 315 different individual whales of which 31 were resighted in other years (23 females, 3 y...2005
16 Potts, Wayne K.Relationship of virulence factor expression to evolved virulence in mouse-passaged Cryptococcus neoformans linesSerial passage of Cryptococcus neoformans in mice increases virulence relative to the nonpassaged line. Postpassaged lines showed no difference in the expression of most known virulence factors, with the exception that the more virulent lines had smaller capsules in vitro. These data imply that othe...Capsule; Death; Passage2005
17 Bohs, Lynn A.Solanaceae: the potato familyShrubs, herbs, woody vines, occasionally trees, glabrous or pubescent with simple, glandular, branched, or star-shaped hairs, sometimes with prickles. Lvs alternate or paired but not truly opposite, simple or lobed to pinnately compound; stipules absent. Infl composed of variously modified terminal...Browallia; Brugmansia; Brunfelsia; Capsicum; Cestrum; Petunia; Physalis; Solandra; Solanum; Streptosolen2005
18 Goller, FranzSynthesizing bird songIn this work we present an electronic syrinx: an analogical integrator of the equations describing a model for sound production by oscine birds. The model depends on time varying parameters with clear biological interpretation: the air sac pressure and the tension of ventral syringeal muscles. We te...Syrinx; Tension; Transducer2005
19 Adler, Frederick R.; Liou, Theodore G.Use of lung transplantation survival models to refine patient selection in cystic fibrosisLung transplantation in cystic fibrosis may improve survival for patients with low 5-year predicted survival. Identifying characteristics that affect post-transplantation survival may improve patient selection and survival benefit. Using Cystic Fibrosis Foundation Patient Registry and United Network...Lung transplation; Survival; Burkholderia cepacia2005
20 Adler, Frederick R.; Jackson, Brian Richard; Carroll, Karen C.; Samore, Matthew H.Use of strain typing data to estimate bacterial transmission rates in healthcare settingsOBJECTIVE: To create an affordable and accurate method for continuously monitoring bacterial transmission rates in healthcare settings. DESIGN: We present a discrete simulation model that relies on the relationship between in-hospital transmission rates and strain diversity. We also present a proof...Strain typing; Infection control; Transmission model2005
1 - 25 of 20