The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Selden, Robert Z. - One of the best experts on this subject based on the ideXlab platform.
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Red River County, Texas, GTW-184 [TX 078/1]
SFA ScholarWorks, 2020Co-Authors: Perttula, Timothy K., Selden, Robert Z.Abstract:ITE NAME OR SITE NUMBER: George T. Wright Collection, Red River County, Texas VESSEL NO.: GTW-184 [TX 078/1], B. R. R. VESSEL FORM: Bottle with a spool neck (Figure 15) NON-PLASTICS AND PASTE: shell RIM AND LIP FORM: Everted rim and rounded lip CORE COLOR: B (fired and cooled in a reducing environment) INTERIOR SURFACE COLOR: very dark grayish-brown EXTERIOR SURFACE COLOR: very dark grayish-brown WALL THICKNESS (IN MM): rim, 3.4 mm INTERIOR SURFACE TREATMENT: none EXTERIOR SURFACE TREATMENT: burnished HEIGHT (IN CM): 12.7 ORIFICE DIAMETER (IN CM): 3.3 DIAMETER AT BOTTOM OF RIM OR NECK (IN CM): 4.3; maximum body diameter: 10.6 cm BASE DIAMETER (IN CM) AND SHAPE OF BASE: 4.5 cm, circular and rounded ESTIMATED VOLUME (IN LITERS): 0.2 Decoration (INCLUDING MOTIF AND ELEMENTS WHEN APPARENT): The vessel body has a series of three curvilinear and interlocking engraved scrolls filled with incised lines pitched in different Decorations. Inside each scroll element are a total of three engraved circles surrounded by incised lines. The vessel also has a lip notched rim, and notched from right to left. PIGMENT USE AND LOCATION ON VESSEL: none TYPE AND VARIETY (IF KNOWN): Hudson Engraved Hudson Engraved bottle with a spool neck, GTW-184.https://scholarworks.sfasu.edu/ita-hudsonengraved/1010/thumbnail.jp
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Red River County, Texas, GTW-210 [TX 081/1]
SFA ScholarWorks, 2020Co-Authors: Perttula, Timothy K., Selden, Robert Z.Abstract:SITE NAME OR SITE NUMBER: George T. Wright Collection, Red River County, Texas VESSEL NO.: GTW-210 [TX 081/1], S. R. R. [Surface, Red River County] VESSEL FORM: Bottle with a spool neck NON-PLASTICS AND PASTE: shell RIM AND LIP FORM: Everted rim and rounded lip CORE COLOR: G (fired in a reducing environment and cooled in the open air) INTERIOR SURFACE COLOR: dark grayish-brown EXTERIOR SURFACE COLOR: brown; fire clouds on the rim, body, and base WALL THICKNESS (IN MM): rim, 5.1 mm INTERIOR SURFACE TREATMENT: none EXTERIOR SURFACE TREATMENT: burnished HEIGHT (IN CM): 14.3 ORIFICE DIAMETER (IN CM): 3.7 DIAMETER AT BOTTOM OF RIM OR NECK (IN CM): 4.0; maximum body diameter: 9.9 cm BASE DIAMETER (IN CM) AND SHAPE OF BASE: 3.1 cm, circular and rounded ESTIMATED VOLUME (IN LITERS): 0.2 Decoration (INCLUDING MOTIF AND ELEMENTS WHEN APPARENT): The vessel body has a series of four curvilinear and interlocking engraved scrolls filled with incised lines pitched in different Decorations. Surrounding the vessel base are a series of four scroll elements and a large negative circle. The vessel also has a right to left lip notched rim. PIGMENT USE AND LOCATION ON VESSEL: none TYPE AND VARIETY (IF KNOWN): Hudson Engraved Hudson Engraved bottle with a spool neck, GTW-210.https://scholarworks.sfasu.edu/ita-hudsonengraved/1011/thumbnail.jp
Mark A. Elgar - One of the best experts on this subject based on the ideXlab platform.
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signals for damage control web Decorations in argiope keyserlingi araneae araneidae
Behavioral Ecology and Sociobiology, 2011Co-Authors: André Walter, Mark A. ElgarAbstract:Orb web spiders of the genus Argiope are permanently located at the hub of the orb web and are thus vulnerable to changing environmental conditions. Severe damage to the web by non-prey animals can have a significant impact on survival, through the cost of producing expensive silk and the loss of foraging opportunities. Thus, selection should favor web protection mechanisms, and the conspicuous web Decorations, typical of Argiope spiders, may play a role. Decorated webs suffer less damage than undecorated webs, consistent with the view that they advertise the presence of the web to non-prey animals that may damage the web. However, whether spiders respond to web damage by increasing investment in web Decorations has not been investigated. We subjected adult St. Andrew's Cross spider (Argiope keyserlingi) females to three levels of web damage and recorded their subsequent web-decorating behavior. Mild damage, similar to that caused by impacting prey, did not affect either web building or decorating behavior. However, spiders subjected to substantial web damage both reduced the size of subsequent webs and increased investment in web Decoration size. These data are consistent with an advertising role of web Decorations.
Yang Shaohorn - One of the best experts on this subject based on the ideXlab platform.
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enhancement of oxygen surface exchange on epitaxial la 0 6 sr 0 4 co 0 2 fe 0 8 o 3 δ thin films using advanced heterostructured oxide interface engineering
MRS Communications, 2016Co-Authors: Dongkyu Lee, Yuehlin Lee, Xiao Renshaw Wang, Dane Morgan, Yang ShaohornAbstract:Engineering of a novel heterostructured oxide interface was used to enhance the oxygen surface exchange kinetics of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF 113 ) thin films. A single-layer Decoration of mixed (LaSr) 2 CoO 4± δ (LSC 214 ) and La 1− x Sr x CoO 3− δ (LSC 113 ) and a double-layer Decoration of stacked LSC 214 and LSC 113 grown on the LSCF 113 markedly enhanced the surface exchange coefficients of the LSCF 113 by up to ~1.5 orders of magnitude relative to the undecorated LSCF 113 . It is hypothesized that two different types of surface Decorations can enable Sr segregation at the interface and surfaces of LSC 113 and LSC 214 , leading to enhancement of the oxygen surface exchange kinetics of decorated LSCF 113 .
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enhanced oxygen reduction activity on surface decorated perovskite thin films for solid oxide fuel cells
Energy and Environmental Science, 2011Co-Authors: Eva Mutoro, Ethan J Crumlin, Michael D Biegalski, Hans M Christen, Yang ShaohornAbstract:Surface-Decoration of perovskites can strongly affect the oxygen reduction activity, and therefore is a new and promising approach to improve SOFC cathode materials. In this study, we demonstrate that a small amount of secondary phase on a (001) La0.8Sr0.2CoO3−δ (LSC) surface can either significantly activate or passivate the electrode. LSC (001) microelectrodes prepared by pulsed laser deposition on a (001)-oriented yttria-stabilized zirconia (YSZ) substrate were decorated with La-, Co-, and Sr-(hydr)oxides/carbonates. “Sr”-Decoration with nanoparticle coverage in the range from 50% to 80% of the LSC surface enhanced the surface exchange coefficient, kq, by an order of magnitude while “La”-Decoration and “Co”-Decoration led to no change and reduction in kq, respectively. Although the physical origin for the enhancement is not fully understood, results from atomic force microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy suggest that the observed kq enhancement for “Sr”-decorated surfaces can be attributed largely to catalytically active interface regions between surface Sr-enriched particles and the LSC surface.
Perttula, Timothy K. - One of the best experts on this subject based on the ideXlab platform.
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Red River County, Texas, GTW-184 [TX 078/1]
SFA ScholarWorks, 2020Co-Authors: Perttula, Timothy K., Selden, Robert Z.Abstract:ITE NAME OR SITE NUMBER: George T. Wright Collection, Red River County, Texas VESSEL NO.: GTW-184 [TX 078/1], B. R. R. VESSEL FORM: Bottle with a spool neck (Figure 15) NON-PLASTICS AND PASTE: shell RIM AND LIP FORM: Everted rim and rounded lip CORE COLOR: B (fired and cooled in a reducing environment) INTERIOR SURFACE COLOR: very dark grayish-brown EXTERIOR SURFACE COLOR: very dark grayish-brown WALL THICKNESS (IN MM): rim, 3.4 mm INTERIOR SURFACE TREATMENT: none EXTERIOR SURFACE TREATMENT: burnished HEIGHT (IN CM): 12.7 ORIFICE DIAMETER (IN CM): 3.3 DIAMETER AT BOTTOM OF RIM OR NECK (IN CM): 4.3; maximum body diameter: 10.6 cm BASE DIAMETER (IN CM) AND SHAPE OF BASE: 4.5 cm, circular and rounded ESTIMATED VOLUME (IN LITERS): 0.2 Decoration (INCLUDING MOTIF AND ELEMENTS WHEN APPARENT): The vessel body has a series of three curvilinear and interlocking engraved scrolls filled with incised lines pitched in different Decorations. Inside each scroll element are a total of three engraved circles surrounded by incised lines. The vessel also has a lip notched rim, and notched from right to left. PIGMENT USE AND LOCATION ON VESSEL: none TYPE AND VARIETY (IF KNOWN): Hudson Engraved Hudson Engraved bottle with a spool neck, GTW-184.https://scholarworks.sfasu.edu/ita-hudsonengraved/1010/thumbnail.jp
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Red River County, Texas, GTW-210 [TX 081/1]
SFA ScholarWorks, 2020Co-Authors: Perttula, Timothy K., Selden, Robert Z.Abstract:SITE NAME OR SITE NUMBER: George T. Wright Collection, Red River County, Texas VESSEL NO.: GTW-210 [TX 081/1], S. R. R. [Surface, Red River County] VESSEL FORM: Bottle with a spool neck NON-PLASTICS AND PASTE: shell RIM AND LIP FORM: Everted rim and rounded lip CORE COLOR: G (fired in a reducing environment and cooled in the open air) INTERIOR SURFACE COLOR: dark grayish-brown EXTERIOR SURFACE COLOR: brown; fire clouds on the rim, body, and base WALL THICKNESS (IN MM): rim, 5.1 mm INTERIOR SURFACE TREATMENT: none EXTERIOR SURFACE TREATMENT: burnished HEIGHT (IN CM): 14.3 ORIFICE DIAMETER (IN CM): 3.7 DIAMETER AT BOTTOM OF RIM OR NECK (IN CM): 4.0; maximum body diameter: 9.9 cm BASE DIAMETER (IN CM) AND SHAPE OF BASE: 3.1 cm, circular and rounded ESTIMATED VOLUME (IN LITERS): 0.2 Decoration (INCLUDING MOTIF AND ELEMENTS WHEN APPARENT): The vessel body has a series of four curvilinear and interlocking engraved scrolls filled with incised lines pitched in different Decorations. Surrounding the vessel base are a series of four scroll elements and a large negative circle. The vessel also has a right to left lip notched rim. PIGMENT USE AND LOCATION ON VESSEL: none TYPE AND VARIETY (IF KNOWN): Hudson Engraved Hudson Engraved bottle with a spool neck, GTW-210.https://scholarworks.sfasu.edu/ita-hudsonengraved/1011/thumbnail.jp
Andrea M. Hounslow - One of the best experts on this subject based on the ideXlab platform.
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Decoration of the enterococcal polysaccharide antigen EPA is essential for virulence, cell surface charge and interaction with effectors of the innate immune system
PLoS Pathogens, 2019Co-Authors: Robert E. Smith, Bartłomiej Salamaga, Piotr Szkuta, Natalia Hajdamowicz, Tomasz K. Prajsnar, Gregory S. Bulmer, Thierry Fontaine, Justyna Kołodziejczyk, Jean-marie Herry, Andrea M. HounslowAbstract:Enterococcus faecalis is an opportunistic pathogen with an intrinsically high resistance to lysozyme, a key effector of the innate immune system. This high level of resistance requires a complex network of transcriptional regulators and several genes (oatA, pgdA, dltA and sigV) acting synergistically to inhibit both the enzymatic and cationic antimicrobial peptide activities of lysozyme. We sought to identify novel genes modulating E. faecalis resistance to lysozyme. Random transposon mutagenesis carried out in the quadruple oatA/pgdA/dltA/sigV mutant led to the identification of several independent insertions clustered on the chromosome. These mutations were located in a locus referred to as the enterococcal polysaccharide antigen (EPA) variable region located downstream of the highly conserved epaA-epaR genes proposed to encode a core synthetic machinery. The epa variable region was previously proposed to be responsible for EPA Decorations, but the role of this locus remains largely unknown. Here, we show that EPA Decoration contributes to resistance towards charged antimicrobials and underpins virulence in the zebrafish model of infection by conferring resistance to phagocytosis. Collectively, our results indicate that the production of the EPA rhamnopolysaccharide backbone is not sufficient to promote E. faecalis infections and reveal an essential role of the modification of this surface polymer for enterococcal pathogenesis.
