629 Matching Results

Results open in a new window/tab.

The accessory role of the diaphragmaticus muscle in lung ventilation in the estuarine crocodile Crocodylus porosus (open access)

The accessory role of the diaphragmaticus muscle in lung ventilation in the estuarine crocodile Crocodylus porosus

This article explores lung ventilation in crocodilians through direct measurements of ventilation, metabolic rate, and arterial blood gases of juvenile estuarine crocodiles in varying conditions. The results suggest that, in C. porosus, costal ventilation alone is able to support metabolic demands at rest, and the diaphragmaticus is largely an accessory muscle used at times of elevated metabolic demand.
Date: November 17, 2011
Creator: Munns, Suzanne L.; Owerkowicz, Tomasz; Andrewartha, Sarah J. & Frappell, Peter B.
Object Type: Article
System: The UNT Digital Library
Cluster embedding of ionic systems: Point charges and extended ions (open access)

Cluster embedding of ionic systems: Point charges and extended ions

This article presents a detailed analysis of the orbital energies of a representative cluster model of a high spin metal oxide, FeO, that has been made to determine the importance of different embedding schemes to represent the extended oxide crystal. The embedding of cluster models of oxides with point charges and with extensions of the embedding which take into account the spatial extent of the cations is examined with an emphasis on the consequences of this embedding for the relative ionization and excitation energies that are measured in core-level spectroscopies.
Date: May 1, 2019
Creator: Bagus, Paul S.; Sassi, Michael J. & Rosso, Kevin M.
Object Type: Article
System: The UNT Digital Library
Detergentes y Biodetergentes en la Biorremediación de Suelo: Inconsistencias y Evidencias (open access)

Detergentes y Biodetergentes en la Biorremediación de Suelo: Inconsistencias y Evidencias

This article analyzes the bioremediation of the soil contaminated by hydrocarbons (HYCOS), the importance of biostimulation with a detergent (DEGE) or biodetergent (BIODET) and the inconsistencies generated by their application.
Date: August 28, 2020
Creator: Saucedo-Martínez, Blanca Celeste; Márquez-Benavides, Liliana; Santoyo-Pizano, Gustavo & Sánchez-Yáñez, Juan Manuel
Object Type: Article
System: The UNT Digital Library
Multisite phosphorylation of a synthetic peptide derived from the carboxyl terminus of the ribosomal protein S6 (open access)

Multisite phosphorylation of a synthetic peptide derived from the carboxyl terminus of the ribosomal protein S6

Article synthesizing and testing the synthetic peptide AKRRRLSSLRASTSKSESSQK (56-21) which corresponds to the carboxyl-terminal 21 amino acids of human ribosomal protein S6 as a substrate for S6/H4 kinase purified from human placenta. The data suggests that multiple S6 kinases may be required to phosphorylate S6 at all five sites which are modified in vivo.
Date: January 5, 1991
Creator: Brandon, Stanley D. & Masaracchia, Ruthann A.
Object Type: Article
System: The UNT Digital Library
Molecular cloning and characterization of a gene encoding pea cytosolic ascorbate peroxidase (open access)

Molecular cloning and characterization of a gene encoding pea cytosolic ascorbate peroxidase

Article isolating a gene encoding cytosolic bate peroxidase (ApxI) from pea (Pisum sativum L.) and determining its nucleotide sequence.
Date: October 25, 1992
Creator: Mittler, Ron & Zilinskas, B.A.
Object Type: Article
System: The UNT Digital Library
Activation of an S6 Kinase From Human Placenta by Autophosphorylation (open access)

Activation of an S6 Kinase From Human Placenta by Autophosphorylation

Article describing a novel S6 kinase isolated from human placenta which autoactivates through autophosphorylation in vitro. The data supports the hypothesis that this previously uncharacterized S6 kinase belongs to a unique family of protein kinases which utilize autophosphorylation as part of their in vivo activation mechanism.
Date: September 15, 1993
Creator: Dennis, Patrick B. & Masaracchia, Ruthann A.
Object Type: Article
System: The UNT Digital Library
Activation of an S6/H4 Kinase (PAK 65) from Human Placenta by Intramolecular and Intermolecular Autophosphorylation (open access)

Activation of an S6/H4 Kinase (PAK 65) from Human Placenta by Intramolecular and Intermolecular Autophosphorylation

Article proposing a model in which phosphorylation of sites 1 and 2 occurs sequentially. The model proposes that trypsin treatment of the inactive holoenzyme removes an inhibitory rac-binding domain which blocks MgATP access to the catalytic site. The pseudosubstrate domain at site 1 is autophosphorylated and subsequent bimolecular autophosphorylation at site 2 fully opens the catalytic site.
Date: September 8, 1995
Creator: Benner, Gretchen E.; Dennis, Patrick B. & Masaracchia, Ruthann A.
Object Type: Article
System: The UNT Digital Library
Phosphorylation of Myosin Light Chain Kinase by p21-activated Kinase PAK2 (open access)

Phosphorylation of Myosin Light Chain Kinase by p21-activated Kinase PAK2

Article reporting that PAK2, a member of the Rho family of GTPase-dependent kinases, regulates isometric tension development and myosin II RLC phosphorylation in saponin permeabilized endothelial monolayers. The results demonstrate that PAK2 can directly phosphorylate MLCK, inhibiting its activity and limiting the development of isometric tension.
Date: June 16, 2000
Creator: Goeckeler, Zoe M.; Masaracchia, Ruthann A.; Zeng, Qi; Chew, Teng-Leong; Gallagher, Patricia & Wysolmerski, Robert B.
Object Type: Article
System: The UNT Digital Library
The Water-Water Cycle Is Essential for Chloroplast Protection in the Absence of Stress (open access)

The Water-Water Cycle Is Essential for Chloroplast Protection in the Absence of Stress

Article showing that knockdown Arabidopsis plants with suppressed expression of the key water-water cycle enzyme, thylakoid-attached copper/zinc superoxide dismutase (KD-SOD), are suppressed in their growth and development. This article provides e genetic evidence for the importance of the water-water cycle in protecting the photosynthetic apparatus of higher plants from photooxidative damage.
Date: October 3, 2003
Creator: Rizhsky, Ludmila; Liang, Hongjian & Mittler, Ron
Object Type: Article
System: The UNT Digital Library
Function of Conserved Residues of Human Glutathione Synthetase: Implications for the ATP-Grasp Enzymes (open access)

Function of Conserved Residues of Human Glutathione Synthetase: Implications for the ATP-Grasp Enzymes

Article examining the mechanism of Glutathione synthetase, an enzyme that belongs to the glutathione synthetase ATP-binding domain-like superfamily. A variety of structural alignment methods were applied and four highly conserved residues of human glutathione synthetase (Glu-144, Asn-146, Lys-305, and Lys-364) were identified in the binding site. The function of these was studied by experimental and computational site-directed mutagenesis.
Date: May 21, 2004
Creator: Dinescu, Adriana; Cundari, Thomas R., 1964-; Bhansali, Vikas S.; Luo, Jia-Li & Anderson, Mary E.
Object Type: Article
System: The UNT Digital Library
The EAR-motif of the Cys2/His2-type Zinc Finger Protein Zat7 Plays a Key Role in the Defense Response of Arabidopsis to Salinity Stress (open access)

The EAR-motif of the Cys2/His2-type Zinc Finger Protein Zat7 Plays a Key Role in the Defense Response of Arabidopsis to Salinity Stress

Article reporting that transgenic Arabidopsis plants constitutively expressing the Cys2/His2 zinc finger protein Zat7 have suppressed growth and are more tolerant to salinity stress. Findings demonstrate that the EAR-domain of Cys2/His2-type zinc finger proteins plays a key role in the defense response of Arabidopsis to abiotic stresses.
Date: March 23, 2007
Creator: Ciftci-Yilmaz, Sultan; Morsy, Mustafa R.; Song, Luhua; Coutu, Alicia; Krizek, Beth A.; Lewis, Michael W. et al.
Object Type: Article
System: The UNT Digital Library
The Transcriptional Co-activator MBF1c Is a Key Regulator of Thermotolerance in Arabidopsis thaliana (open access)

The Transcriptional Co-activator MBF1c Is a Key Regulator of Thermotolerance in Arabidopsis thaliana

Article reporting that the highly conserved transcriptional co-activator, MBF1c (multiprotein bridging factor 1c), is a key regulator of thermotolerance in Arabidopsis thaliana. Results provide evidence for the existence of a tightly coordinated heat stress-response network, involving trehalose-, SA-, and ethylene-signaling pathways, that is under the control of MBF1c.
Date: April 4, 2008
Creator: Suzuki, Nobuhiro; Bajad, Sunil; Shuman, Joel; Shulaev, Vladimir & Mittler, Ron
Object Type: Article
System: The UNT Digital Library
Ascorbate Peroxidase 1 Plays a Key Role in the Response of Arabidopsis thaliana to Stress Combination (open access)

Ascorbate Peroxidase 1 Plays a Key Role in the Response of Arabidopsis thaliana to Stress Combination

Article conducting proteomic and metabolic analysis of Arabidopsis thaliana plants subjected to a combination of drought and heat stress. The authors identify 45 different proteins that specifically accumulated in Arabidopsis in response to the stress combination. The findings suggest that cytosolic APX1 plays a key role in the acclimation of plants to a combination of drought and heat stress.
Date: December 5, 2008
Creator: Koussevitzky, Shai; Suzuki, Nobuhiro; Huntington, Serena; Armijo, Leigh; Sha, Wei; Cortes, Diego F. et al.
Object Type: Article
System: The UNT Digital Library
Unraveling Δ1-Pyrroline-5-Carboxylate-Proline Cycle in Plants by Uncoupled Expression of Proline Oxidation Enzymes (open access)

Unraveling Δ1-Pyrroline-5-Carboxylate-Proline Cycle in Plants by Uncoupled Expression of Proline Oxidation Enzymes

Article showing that overexpression of MsProDH in tobacco and Arabidopsis or impairment of P5C oxidation in the Arabidopsis p5cdh mutant did not change the cellular Pro to P5C ratio under ambient and osmotic stress conditions, indicating that P5C excess was reduced to Pro in a mitochondrial-cytosolic cycle. Results show that normal oxidation of P5C to Glu by P5CDH is key to prevent P5C-Pro intensive cycling and avoid ROS production from electron run-off.
Date: September 25, 2009
Creator: Miller, Gad; Honig, Arik; Stein, Hanan; Suzuki, Nobuhiro; Mittler, Ron & Zilberstein, Aviah
Object Type: Article
System: The UNT Digital Library
Mutations in Arabidopsis Fatty Acid Amide Hydrolase Reveal That Catalytic Activity Influences Growth but Not Sensitivity to Abscisic Acid or Pathogens (open access)

Mutations in Arabidopsis Fatty Acid Amide Hydrolase Reveal That Catalytic Activity Influences Growth but Not Sensitivity to Abscisic Acid or Pathogens

Article showing that the enhanced growth and NAE tolerance of the AtFAAH overexpressing seedlings depends on the catalytic activity of AtFAAH, hypersensitivity to ABA and hypersusceptibility to nonhost pathogens are independent of its enzymatic activity. Findings suggest that the AtFAAH influences plant growth and interacts with ABA signaling and plant defense through distinctly different mechanisms.
Date: December 4, 2009
Creator: Kim, Sang-Chul; Kang, Li; Nagaraj, Satish; Blancaflor, Elison B.; Mysore, Kirankumar S. & Chapman, Kent D.
Object Type: Article
System: The UNT Digital Library
Frontiers in Aquatic Physiology – grand challenge (open access)

Frontiers in Aquatic Physiology – grand challenge

Opinion article covering grand challenges to aquatic physiology based on the five "grand challenges in organismal biology" proposed by Schwenk et al. (2007). This article also provides a list of specific examples of emerging areas of research interest in aquatic physiology.
Date: May 18, 2010
Creator: Evans, David H.; Axelsson, Michael; Beltz, Barbara; Burggren, Warren W.; Castellini, Michael; Clements, Kendall D. et al.
Object Type: Article
System: The UNT Digital Library
Temperature-sensitive Post-translational Regulation of Plant Omega-3 Fatty-acid Desaturases Is Mediated by the Endoplasmic Reticulum-associated Degradation Pathway (open access)

Temperature-sensitive Post-translational Regulation of Plant Omega-3 Fatty-acid Desaturases Is Mediated by the Endoplasmic Reticulum-associated Degradation Pathway

Article expressing two closely related plant FAD3 genes in yeast cells and found that their enzymes produced significantly different amounts of omega-3 fatty acids and that these differences correlated to differences in rates of protein turnover. The findings indicate that Fad3 protein abundance is regulated by a combination of cis-acting degradation signals and the ubiquitin-proteasome pathway and that modulation of Fad3 protein amounts in response to temperature may represent one mechanism of homeoviscous adaptation in plants.
Date: July 9, 2010
Creator: O'Quin, Jami B.; Bourassa, Linda; Zhang, Daiyuan; Shockey, Jay M.; Gidda, Satinder K.; Fosnot, Spencer et al.
Object Type: Article
System: The UNT Digital Library
Visualization of Lipid Droplet Composition by Direct Organelle Mass Spectrometry (open access)

Visualization of Lipid Droplet Composition by Direct Organelle Mass Spectrometry

Article reporting an approach that combines the visualization of individual lipid droplets (LDs), microphase extraction of lipid components from droplets, and the direct identification of lipid composition by nanospray mass spectrometry, even to the level of a single LD. The triacylglycerol (TAG) composition of LDs from several plant sources (mature cotton (Gossypium hirsutum) embryos, roots of cotton seedlings, and Arabidopsis thaliana seeds and leaves) were examined by direct organelle mass spectrometry and revealed the heterogeneity of LDs derived from different plant tissue sources.
Date: February 4, 2011
Creator: Horn, Patrick J.; Ledbetter, Nicole R.; James, Christopher N.; Hoffman, William D.; Case, Charlene R.; Verbeck, Guido F. et al.
Object Type: Article
System: The UNT Digital Library
Development of micro-electrode array based tests for neurotoxicity: assessment of interlaboratory reproducibility with neuroactive chemicals (open access)

Development of micro-electrode array based tests for neurotoxicity: assessment of interlaboratory reproducibility with neuroactive chemicals

Article evaluating the response to the pharmacological compounds Fluoxetine, Muscimol, and Verapamil in primary neuronal cultures. Final conclusions are drawn that MEA technology has a potential for standard in vitro neurotoxicity/neuropharmacology evaluation.
Date: April 27, 2011
Creator: Novellino, A.; Scelfo, Bibiana; Palosaari, T.; Price, A.; Sobanski, Tomasz; Shafer, T.J. et al.
Object Type: Article
System: The UNT Digital Library
Lipoxygenase-mediated Oxidation of Polyunsaturated N-Acylethanolamines in Arabidopsis (open access)

Lipoxygenase-mediated Oxidation of Polyunsaturated N-Acylethanolamines in Arabidopsis

Article hypothesizing that lipoxygenase (LOX) participated in the metabolism of PU-NAEs through the formation of NAE-oxylipins. The data suggests that Arabidopsis LOXs indeed compete with FAAH to metabolize PU-NAEs during seedling establishment. Identification of endogenous amide-conjugated oxylipins suggests potential significance of these metabolites in vivo, and FAAH mutants may offer opportunities to address this in the future.
Date: April 29, 2011
Creator: Kilaru, Aruna; Herrfurth, Cornelia; Keereetaweep, Jantana; Hornung, Ellen; Venables, Barney J.; Feussner, Ivo et al.
Object Type: Article
System: The UNT Digital Library
Permutation Complexity Related to the Letter Doubling Map (open access)

Permutation Complexity Related to the Letter Doubling Map

Article presented at the 8th International Conference Words 2011 in Prague, Czech Republic. This article investigates the combinatorial complexity of infinite permutations on N associated with the image of uniformly recurrent aperiodic binary words under the letter doubling map.
Date: August 17, 2011
Creator: Widmer, Steven
Object Type: Article
System: The UNT Digital Library
Pulmonary compliance and lung volume varies with ecomorphology in anuran amphibians: implications for ventilatory-assisted lymph flux (open access)

Pulmonary compliance and lung volume varies with ecomorphology in anuran amphibians: implications for ventilatory-assisted lymph flux

This article examining the correlation between pulmonary compliance, lung volume, and lymph flux rates in anurans. The findings of this article suggest that lymph mobilization capacity may explain some of the variation in pulmonary compliance and lung volume in anurans.
Date: October 1, 2011
Creator: Hedrick, Michael; Hillman, Stanley S.; Drewes, Robert C. & Withers, Philip C.
Object Type: Article
System: The UNT Digital Library
Low-energy positron interactions with xenon (open access)

Low-energy positron interactions with xenon

This article studies low-energy interactions of positrons with xenon experimentally and theoretically. Results are compared with previous literature.
Date: December 8, 2011
Creator: Machacek, J. R.; Makochekanwa, C.; Jones, A.C.L.; Caradonna, P.; Slaughter, D.S.; McEachran, R.P. et al.
Object Type: Article
System: The UNT Digital Library
Coprologic survey of endoparasites from Darwin’s fox (Pseudalopex fulvipes) in Chiloé, Chile (open access)

Coprologic survey of endoparasites from Darwin’s fox (Pseudalopex fulvipes) in Chiloé, Chile

Article on parasite presence in the critically endangered Darwin's fox (Pseudalopex fulvipes) in Chile. Parasites found include species and genera reported for the first time in Darwin's fox.
Date: 2012
Creator: Jiménez, Jaime E.; Briceño, C.; Alcaíno, H.; Vásquez, P.; Funk, S. & González-Acuña, D.
Object Type: Article
System: The UNT Digital Library