cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Selective priming of rate and duration of the respiratory burst of neutrophils by 1, 2-diacyl and 1-O-alkyl-2-acyl diglycerides. Possible relation to effects on protein kinase C.
Creators: name: BASS, D.
name: MCPHAIL, L.
name: MCCALL, C.
name: MORRIS-NATSCHKE, S
name: WYKLE, R.
name: SCHMITT, J.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1988

description: Both 1,2-diacyl- and 1-O-alkyl-2-acyl-sn-glycerols are released during stimulation of human polymorphonuclear leukocytes (PMNL). 1,2-Diacylglycerols have received intense interest as intracellular "second messengers" due to their ability to activate protein kinase C (Ca2+ phospholipid-dependent enzyme). However, little is known about bioactivities of the alkylacylglycerols. This study compared the ability of 1,2-diacyl- and 1-O-alkyl-2-acylglycerols to modulate the respiratory burst of stimulated PMNL, a response which depends on the activation of an NADPH oxidase to generate bactericidal species of reduced oxygen. Direct stimulation by N-formyl-Met-Leu-Phe caused an abrupt release of H2O2 which ceased within 2.5 min. Preincubation with diacylglycerols (1-oleoyl-2-acetylglycerol,5-30 microM, and 1,2-dioctanoylglycerol,2-5 microM) caused a decrease in lag time, 3-fold increase in initial rate of H2O2 release, and marked prolongation of the response to N-formyl-Met-Leu-Phe (features characteristic of a priming effect). Preincubation with alkylacylglycerols (1-O-delta 9-octadecenyl-2-acetylglycerol, 5-30 microM, and 1-O-octyl-2-octanoylglycerol, 20-50 microM) primed initiation (shortened lag time and increased velocity) but, in contrast to diacylglycerols, did not alter duration of H2O2 release. While low concentrations of diacylglycerols (5-30 microM) primed PMNL, higher concentrations (greater than or equal to 70 microM) stimulated the cells directly. In contrast, higher (70-100 microM) concentrations of alkylacylglycerols did not prime the responses but, in fact, inhibited priming (especially of duration) induced by diacylglycerol. The high concentrations of alkylacylglycerol also inhibited direct stimulation induced by high concentrations of diacylglycerol. Direct stimulation by high concentrations of diacylglycerol probably involves activation of protein kinase C, whereas alkylacylglycerol was found to inhibit activation of protein kinase C by diacylglycerol in vitro. Thus, diacylglycerols are complete priming agonists, altering both rate and duration of the response. In contrast, alkylacylglycerols may have biphasic, concentration-related effects in modulation of functions of PMNL. At low concentrations, they may facilitate initiation of functional events; however, as their concentration increases, they may serve to terminate responses. The distinct priming effects of these diglycerides also reveal that priming can involve at least two distinct events: 1) initiation and 2) prolongation.(ABSTRACT TRUNCATED AT 400 WORDS)
On electromagnetic surface waves supported by an isotropic chiral material
Creators: name: Noonan, James
name: Mackay, Tom G.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Electromagnetic surface waves supported by an isotropic chiral material were investigated via the associated canonical boundary-value problem. Specifically, two scenarios were considered: surface waves guided by the planar interface of an isotropic chiral material and (a) an isotropic dielectric material and (b) a uniaxial dielectric (or plasmonic) material. Both plasmonic and non-plasmonic achiral partnering materials were investigated. In scenario (a) surface waves akin to surface-plasmon-polariton (SPP) waves were excited, while in scenario (b) surface waves akin to Dyakonov waves and akin to SPP waves were excited. For numerical studies, an isotropic chiral material capable of simultaneously supporting attenuation and amplification of plane waves, depending upon circular polarization state, was used. The amplitude of the SPP-like waves could be either amplified or attenuated, depending upon the relative permittivity of the isotropic dielectric partnering material for scenario (a), or depending upon the direction of propagation relative to the optic axis of the uniaxial dielectric partnering material for scenario (b).
The Weak $ΛΛK^0$ Interaction
Creators: name: Savage, Martin J.
name: Springer, Roxanne P.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the leading contribution to the weak $ΛΛK$ coupling in heavy baryon chiral perturbation theory, including the SU(3) breaking terms arising at one-loop. This coupling gives the leading one-boson exchange amplitude for the process $ΛΛ\toΛn$ and is an important component in understanding the decay of $ΛΛ$-hypernuclei. We find the S-wave and P-wave amplitudes to be stable under one-loop corrections, but the associated errors become large. We discuss the theoretical errors and potential effects of higher order terms.
description: 13 pages, 5 figures, latex
Studies on Ca (II) binding to gamma-carboxyglutamic acid. Use of thermal decarboxylation to probe metal ion/gamma-carboxyglutamic acid interactions.
Creators: name: Hoke, R A
name: Lewis, M R
name: Hiskey, R G
name: Pedersen, L G
name: Deerfield, D W
name: Koehler, K A
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1988

description: The thermal decarboxylation of N-benzyloxycarbonyl-L-gamma-carboxyglutamic acid alpha-methyl ester [Z)-L-Gla-OMe) has been studied. In the presence of increasing amounts of calcium or magnesium ions, lyophilized powders of (Z)-L-Gla-OMe exhibit a corresponding increase in thermal stability. Both magnesium and calcium form relatively tight, thermally stable complexes with (Z)-L-Gla-OMe at high metal ion concentrations. Differences between Ca(II) and Mg(II) binding are noted at low metal ion concentrations, where (Z)-L-Gla-OMe is in excess. Under these conditions, complex formation with Mg(II) apparently favors a 2:1 Gla-magnesium ion complex in which both Gla residues are unstable to thermal decarboxylation. Calcium ion complexes, however, are found to favor a 3:1 Gla-calcium ion complex in which 1 of the 3 Gla residues is thermally stable.
Additional file 1 of Intensity of perinatal care, extreme prematurity and sensorimotor outcome at 2 years corrected age: evidence from the EPIPAGE-2 cohort study
Creators: name: Morgan, Andrei S.
name: L’Helias, Laurence Foix
name: Diguisto, Caroline
name: Marchand-Martin, Laetitia
name: Kaminski, Monique
name: Khoshnood, Babak
name: Zeitlin, Jennifer
name: Bréart, Gérard
name: Durrmeyer, Xavier
name: Goffinet, François
name: Pierre-Yves Ancel
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Science Policy

description: S1 Appendix. Creating a ratio to measure intensity of active perinatal care. (PDF 143 kb)
Pheidole macrops Wilson, 2003, new species
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole macrops

description: Pheidole macrops new species
Types Mus. Comp. Zool. Harvard.
etymology Gr macrops, large-eyed.
Diagnosis A member of the " bicarinata complex" of the larger pilifera group, comprising agricola, aurea, barbata, bicarinata, centeotl, cerebrosior, defecta, gilvescens, macclendoni, macrops, marcidula, paiute, pinealis, vinelandica, xerophila, yaqui, and yucatana (macrops is closet to yaqui), which complex is characterized by the large to very large, forward-set eyes of both castes; and, in the major, the occipital lobes usually lacking any sculpturing; the posterior half of the head capsule almost entirely smooth and shiny; and the postpetiolar node seen from above oval, elliptical, or laterally angular (cornulate in cerebrosior). P. macrops is distinguished within the complex by the following combination of traits.
Major: reddish brown; sides of pronotum longitudinally carinulate; posterior half of dorsum of head sprinkled with sparse foveae; propodeum spines relatively long and thin; apex of petiolar node in side view evenly rounded; postpetiolar node from above oval. Minor: dorsal margin of petiolar node seen from behind rises to a peak; propodeal spines vertical. Measurements (mm) Holotype major: HW 1.14, HL 1.30, SL 0.60, EL 0.22, PW 0.56. Paratype minor: HW 0.52, HL 0.56, SL 0.46, EL 0.16, PW 0.30. color Major: concolorous medium reddish brown, tarsi yellow.
Minor: body and mandibles blackish brown to black, legs and antennae medium to dark brown.
Range Known only from the type locality.
biology The type colony was collected from a ground nest in sandy desert (Philip S. Ward).
Figure Upper: holotype, major. Lower: paratype, minor. MEXICO: 4 km south-southeast of Guerrero Negro, Baja California Sur (Philip S. Ward). Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 583
Quantum Holonomies and the Heisenberg Group
Creators: name: Nelson, J. E.
name: Picken, R. F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81R50 - 83C45

description: Quantum holonomies of closed paths on the torus $T^2$ are interpreted as elements of the Heisenberg group $H_1$. Group composition in $H_1$ corresponds to path concatenation and the group commutator is a deformation of the relator of the fundamental group $π_1$ of $T^2$, making explicit the signed area phases between quantum holonomies of homotopic paths. Inner automorphisms of $H_1$ adjust these signed areas, and the discrete symplectic transformations of $H_1$ generate the modular group of $T^2$.
description: 8 pages, 3 figures
The reaction of bovine alpha-thrombin with tetranitromethane. Characterization of the modified protein.
Creators: name: Lundblad, R L
name: Jenzano, J W
name: Featherstone, G L
name: Noyes, C M
name: Harrison, J H
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1988

description: Previous studies from several laboratories have shown that thrombin is inactivated by tetranitromethane with the formation of nitrotyrosine. The inactivation is characterized by an apparently greater loss of fibrinogen-clotting activity than activity toward synthetic ester substrates, suggesting that the residues modified by tetranitromethane are involved in the interaction of thrombin with fibrinogen. This study was designed 1) to determine the effect of solvent conditions on the rate of modification and the stoichiometry of the reaction of tetranitromethane with bovine alpha-thrombin; 2) to identify the residue(s) modified; and 3) to characterize the modified enzyme with respect to its interaction with peptide nitroanilide substrates and fibrinogen. The inactivation of thrombin by tetranitromethane proceeded more rapidly in 50 mM Tris, pH 8.0, than in 50 mM sodium phosphate, 100 mM NaCl, pH 8.0. Approximately 10% fibrinogen-clotting activity remained at maximal inactivation. A study of the effect of tetranitromethane concentration on the rate of inactivation suggested that the loss of activity was the result of the modification of 1 mol of tyrosine/mol of thrombin. A similar result was obtained from the analysis of the extent of inactivation as a function of the extent of protein modification. Structural analysis of the modified protein showed substantial modification at both Tyr71 and Tyr85. Enzyme kinetic studies were performed with the modified protein and a control thrombin with N2-tosylglycylprolylarginine p-nitroanilide. H-D-phenylalanylpipecolylarginine p-nitronailide, and purified bovine fibrinogen. With all three substrates, a substantial decrease in kcat was observed, whereas there was essentially no change in Km. These results suggest that, contrary to previous suggestions, the modification of Tyr71 and Tyr85 in thrombin does not influence the binding of substrates, but rather influences active site reactivity.
Surface Free Energies and Surface Critical Behaviour of the ABF Models with Fixed Boundaries
Creators: name: O'Brien, David L.
name: Pearce, Paul A.
name: Behrend, Roger E.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In a previous paper, we introduced reflection equations for interaction-round-a-face (IRF) models and used these to construct commuting double-row transfer matrices for solvable lattice spin models with fixed boundary conditions. In particular, for the Andrews-Baxter-Forrester (ABF) models, we derived special functional equations satisfied by the eigenvalues of the commuting double-row transfer matrices. Here we introduce a generalized inversion relation method to solve these functional equations for the surface free energies. Although the surface free energies depend on the boundary spins we find that the associated surface critical exponent $α_s=(7-L)/4$ is independent of the choice of boundary.
description: 10 pages, latex2e with the amsmath and amsfonts packages
Almost compact moving breathers with fine-tuned discrete time quantum walks
Creators: name: Vakulchyk, I.
name: Fistul, M. V.
name: Zolotaryuk, Y.
name: Flach, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Discrete time quantum walks are unitary maps defined on the Hilbert space of coupled two-level systems. We study the dynamics of excitations in a nonlinear discrete time quantum walk, whose fine-tuned linear counterpart has a flat band structure. The linear counterpart is, therefore, lacking transport, with exact solutions being compactly localized. A solitary entity of the nonlinear walk moving at velocity $v$ would therefore not suffer from resonances with small amplitude plane waves with identical phase velocity, due to the absence of the latter. That solitary excitation would also have to be localized stronger than exponential, due to the absence of a linear dispersion. We report on the existence of a set of stationary and moving breathers with almost compact superexponential spatial tails. At the limit of the largest velocity $v=1$ the moving breather turns into a completely compact bullet.
description: 8 pages, 8 figures
The unwinding of Duplex regions in DNA by the simian virus 40 large tumor antigen-associated DNA helicase activity
Creators: name: GOETZ, G.
name: MATSON, S.
name: DEAN, F.
name: HURWITZ, J
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1988

description: Etude de l'activité Hélicase associée à l'antigène T de SV40, seule protéine virale essentielle à la réplication de l'ADN de SV40: Mesure de déplacement d'un fragment d'ADN [32P] à partir d'ADN M13 simple brin linéaire contenant de courtes régions duplex.
Pheidole marcidula Wheeler
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole marcidula

description: Pheidole marcidula Wheeler
Pheidole marcidula Wheeler 1908h: 457.
Types Amer. Mus. Nat. Hist; Mus. Comp. Zool. Harvard.
Etymology L marcidula, little and weak, or wasted, allusion unknown.
diagnosis A member of the " bicarinata complex" of the larger pilifera group, comprising agricola, aurea, barbata, bicarinata, centeotl, cerebrosior, defecta, gilvescens, macclendoni, macrops, marcidula, paiute, pinealis, vinelandica, xerophila, yaqui, and yucatana, which complex is characterized by the large to very large, forward-set eyes in both castes; and, in the major, by the occipital lobes lacking any sculpturing (except in aurea); the posterior half of the head capsule almost entirely smooth and shiny; and the postpetiolar node seen from above oval, elliptical, or laterally angular (cornulate in cerebrosior). P. marcidula is distinguished within the complex by the following combination of traits.
Major: clavate hairs occasional on mesosoma, with other ordinary pilosity sparse; apex of petiolar node in side view pointed; postpetiolar node from above laterally subangulate.
Minor: promesonotal dorsal profile lined with evenly spaced pairs of clavate hairs.
Measurements (mm) Major (Sierra Blanca, Texas): HW 0.92, HL 1.22, SL 0.56, EL 0.16, PW 0.42.
Syntype minor: HW 0.44, HL 0.48, SL 0.42, EL 0.12, PW 0.28.
color Major: overall yellow, with gaster and legs in lighter shade than rest of body.
Minor: concolorous pale yellow.
Range Known only from central and western Texas.
Biology P. marcidula is evidently a rare species. Wheeler (1908h) found one colony, nesting beneath a stone at Barton Creek, Texas. In Hudspeth County, Texas, Moody and Francke (1982) found a single colony at 1300 m, nesting in open sandy loam soil.
Figure Upper: major. TEXAS: 5 km south of Sierra Blanca, Hudspeth Co. (O. F. Francke and J. V. Moody). Lower: syntype, minor. TEXAS: Barton Creek, Austin (William M. Wheeler). (Type locality: Barton Creek, Texas.) Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 584
MOESM1 of Flower strip networks offer promising long term effects on pollinator species richness in intensively cultivated agricultural areas
Creators: name: Buhk, Constanze
name: Oppermann, Rainer
name: Schanowski, Arno
name: Bleil, Richard
name: LĂźdemann, Julian
name: Maus, Christian
Publisher: name: figshare
Year: 2018
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Additional file 1. Land-use in the study areas in 2015. Pattern varied from year to year but the type of crops and cover remained relatively stable over the years of the study.
Principles for sensitive and robust biomolecular interaction analysis - The limits of detection and resolution of diffraction-limited focal molography
Creators: name: Frutiger, Andreas
name: Blickenstorfer, Yves
name: Bischof, Silvio
name: Forró, Csaba
name: Lauer, Matthias
name: Gatterdam, Volker
name: Fattinger, Christof
name: Vörös, János
Publisher: name: arXiv
Year: 2018
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Label-free biosensors enable the monitoring of biomolecular interactions in real-time, which is key to the analysis of the binding characteristics of biomolecules. While refractometric optical biosensors are sensitive and well-established, they are susceptible to any change of the refractive index in the sensing volume caused by minute variations in composition of the sample buffer, temperature drifts and nonspecific binding to the sensor surface. Refractometric biosensors require reference channels as well as temperature stabilisation and their applicability in complex fluids such as blood is limited by nonspecific bindings. Focal molography does not measure the refractive index of the entire sensing volume but detects the diffracted light from a coherent assembly of analyte molecules. Thus, it does not suffer from the limitations of refractometric sensors since they stem from non-coherent processes and therefore do not add to the coherent molographic signal. The coherent assembly is generated by selective binding of the analyte molecules to a synthetic binding pattern - the mologram. Focal Molography has been introduced theoretically and verified experimentally in previous papers. However, further understanding of the underlying physics and a diffraction-limited readout is needed to unveil its full potential. This paper introduces refined theoretical models which can accurately quantify the amount of matter bound to the mologram from the diffracted intensity. In addition, it presents measurements of diffraction-limited molographic foci. These improvements enabled us to demonstrate a resolution in real-time binding experiments comparable to the best SPR sensors, without the need of temperature stabilisation or drift correction and to detect small molecules label-free in an endpoint format. The presented experiments exemplify the robustness and sensitivity of diffractometric sensors.
description: 19 pages, 9 figures and a supplemental material of 26 pages
Agonist-induced desensitization of a P2Y-purinergic receptor-regulated phospholipase C.
Creators: name: Martin, Michael
name: Harden, TK
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: A guanine nucleotide-dependent P2Y-purinergic receptor-regulated phospholipase C activity of turkey erythrocyte membranes has been characterized in detail previously (Boyer, J. L., Downes, C. P., and Harden, T. K. (1989) J. Biol. Chem. 264, 884-890). The occurrence of agonist-induced desensitization of this receptor-regulated phospholipase C is now described. Preincubation of turkey erythrocytes with the P2Y-purinergic receptor agonist ADP beta S resulted in a marked loss of capacity of ADP beta S plus GTP to stimulate phospholipase C in membranes derived from these cells. The half-time of occurrence of desensitization was 0.5-2.0 min, and within 10 min responsiveness had reached a new quasi-steady state level representing 40-55% of control. Transfer of agonist-preincubated erythrocytes to agonist-free medium resulted in recovery of agonist plus GTP responsiveness of the membrane phospholipase C activity to control levels with a half-time of 10-20 min. The change in ADP beta S plus GTP responsiveness occurred as a loss of maximal effect with little or no change in the apparent affinity of agonist for stimulation of inositol phosphate production. Induction of desensitization occurred with an agonist-specificity that followed that expected of a P2Y-purinergic receptor. Neither the rate of activation nor the final phospholipase C activity attained in the presence of GTP gamma S alone was altered in membranes from cells preincubated with ADP beta S for 15 min. AlF-4-stimulated inositol phosphate production was also not modified in membranes from agonist-preincubated erythrocytes. In contrast, the capacity of ADP beta S to increase the rate of activation of phospholipase C by GTP gamma S was markedly reduced in membranes from agonist-preincubated cells. The amount of 3H-radioactivity in phosphoinositides, as well as the ratio of labeling among the phosphoinositides, was not altered by incubation of erythrocytes with a P2Y-purinergic receptor agonist. Taken together these data suggest that P2Y-purinergic receptor agonist-induced desensitization occurs as a consequence of a modification at the level of the receptor or at the level of receptor-guanine nucleotide regulatory protein (G-protein) coupling with no change occurring in the capacity of the G-protein to activate phospholipase C.
Phonon Magnetochiral Effect
Creators: name: Nomura, T.
name: Zhang, X. -X.
name: Zherlitsyn, S.
name: Wosnitza, J.
name: Tokura, Y.
name: Nagaosa, N.
name: Seki, S.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetochiral effect (MChE) of phonons, a nonreciprocal acoustic property arising due to the symmetry principles, is demonstrated in a chiral-lattice ferrimagnet Cu$_2$OSeO$_3$. Our high-resolution ultrasound experiments reveal that the sound velocity differs for parallel and antiparallel propagation with respect to the external magnetic field.The sign of the nonreciprocity depends on the chirality of the crystal in accordance with the selection rule of the MChE. The nonreciprocity is enhanced below the magnetic ordering temperature and at higher ultrasound frequencies, which is quantitatively explained by a proposed magnon-phonon hybridization mechanism.
description: 5 pages, 4 figures
A unitary model for meson-nucleon scattering
Creators: name: Feuster, T.
name: Mosel, U.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In an effective Lagrangian model employing the K-matrix approximation we extract nucleon resonance parameters. To this end we analyze simultaneously all available data for reactions involving the final states $πN$, $ππN$, $ηN$ and $K Λ$ in the energy range $m_N + m_π \le \sqrt s \le 1.9$ GeV. The background contributions are generated consistently from the relevant Feynman amplitudes, thus significantly reducing the number of free parameters.
description: Revised version. 60 pages, 17 figures. Two figures and a short discussion (\pi N \to \eta N, K \Lambda amplitudes) added, typos and minor errors in the citations corrected
On the segregation of Re at dislocations in the γ' phase of Ni-based single crystal superalloys
Creators: name: Wu, Xiaoxiang
name: Makineni, Surendra Kumar
name: Kontis, Paraskevas
name: Dehm, Gerhard
name: Raabe, Dierk
name: Gault, Baptiste
name: Eggeler, Gunther
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report evidence of Re and Mo segregation (up to 2.6 at.% and 1 at.%) along with Cr and Co to the dislocations inside of γ' precipitates in a second generation Ni-based single crystal superalloy, after creep deformation at 750°C under an applied stress of 800 MPa. The observed segregation effects can be rationalized through bridging the solute partitioning behavior across the γ/γ' interface and the pipe diffusion mechanism along the core of the dislocation line. This understanding can provide new insights enabling improved alloy design.
Pheidole micula Wheeler
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole micula

description: Pheidole micula Wheeler
Pheidole californica subsp. micula Wheeler 1915b: 408. Raised to species level by Gregg 1959: 24.
Types Mus. Comp. Zool. Harvard; Amer. Mus. Nat. Hist.
etymology L micula, small bit, crumb, or grain.
diagnosis A member of the " pilifera complex" of the larger pilifera group; for a characterization of the complex, see under pilifera. P. micula is distinguished within the complex by the following combination of traits.
Major: entire occiput covered by transverse carinulae that sometimes circle downward at the sides of the head and continue to the anterior border of the head; pronotum very low relative to the mesonotal convexity; propodeal spine equilaterally triangular; petiolar node from the side tapering to a blunt point; postpetiole from above diamond-shaped.
Minor: eye very large and set well forward on the head; propodeal spines reduced to denticles. Stefan Cover, who has studied this species more intensively, offers the following cautionary note (in litt): "The cephalic sculpture in P. micula majors is variable and may cause confusion. The type majors represent one extreme [as depicted here -EOW] in which the fine transverse rugae on the occiput wrap around the corners of the head and extend down the sides to the mandibular insertions. In most other collections these lateral rugae are partly absent, leaving the sides of the head posterior to the eye more or less smooth and shining, except for scattered punctures [foveolae]."
Measurements (mm) Paratype major: HW 1.04, HL 1.18, SL 0.52, EL 0.16, PW 0.48. Paratype minor: HW 0.48, HL 0.48, SL 0.44, EL 0.12, PW 0.30.
color Major: clear yellow-orange, the head a shade darker than the rest of the body. Minor: concolorous clear yellow.
Range Southern California to western Texas.
Biology Stefan Cover (unpublished) encountered micula in the mountains of southern Arizona consistently between 1480 and 1690 m, in grassy meadows, sometimes surrounded by juniper-oak woodland. The small colonies were nesting variously under small rocks and in crater nest built in open soil. In western Texas, Moody and Francke (1982) found micula in crater nests built in open soil. A single colony was discovered by G. C. and J. N. Wheeler (1973c) in the cholla-palo verde scrub at Deep Canyon, California, nesting under a stone; seeds of Artiplex, Cryptantha, Oenothera, and Sporobolus were present in the nest.
Figure Upper: syntype, major. Lower: syntype, minor. ARIZONA: Parmalee, Huachuca Mts. (William M. Wheeler). Scale bars = 1 mm.
description: Published as part of Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA :Harvard University Press on page 585
Antithrombin activity of fucoidan. The interaction of fucoidan with heparin cofactor II, antithrombin III, and thrombin
Creators: name: Treanor, R E
name: Meade, J B
name: Whinna, H C
name: Church, F C
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: Fucoidan, poly(L-fucopyranose) linked primarily alpha 1----2 with either a C3- or a C4-sulfate, is an effective anticoagulant in vitro and in vivo (Springer, G. F., Wurzel, H. A., McNeal, G. M., Jr., Ansell, N. J., and Doughty, M. F. (1957) Proc. Soc. Exp. Biol. Med. 94, 404-409). We have determined the antithrombin effects of fucoidan on the glycosaminoglycan-binding plasma proteinase inhibitors antithrombin III and heparin cofactor II. Fucoidan enhances the heparin cofactor II-thrombin reaction more than 3500-fold. The apparent second-order rate constant of thrombin inhibition by heparin cofactor II increases from 4 x 10(4) (in the absence of fucoidan) to 1.5 x 10(8) M-1 min-1 as the fucoidan concentration increases from 0.1 to 10 micrograms/ml and then decreases as fucoidan is increased above 10 micrograms/ml. The fucoidan reaction with heparin cofactor II-thrombin is kinetically equivalent to a "template model." Apparent fucoidan-heparin cofactor II and fucoidan-thrombin dissociation constants are 370 and 1 nM, respectively. The enhancement of thrombin inhibition by fucoidan, like heparin and dermatan sulfate, is eliminated by selective chemical modification of lysyl residues either of heparin cofactor II or of thrombin. The fucoidan-antithrombin III reactions with thrombin and factor Xa are accelerated maximally 285- and 35-fold at fucoidan concentrations of 30 and 500 micrograms/ml, respectively. Using human plasma and 125I-labeled thrombin in an ex vivo system, the heparin cofactor II-thrombin complex is formed preferentially over the antithrombin III-thrombin complex in the presence of 10 micrograms/ml fucoidan. Our results indicate that heparin cofactor II is activated by fucoidan in vitro and in an ex vivo plasma system and suggest that the major antithrombin activity of fucoidan in vivo is mediated by heparin cofactor II and not by antithrombin III.
Charmonium Production from the Secondary Collisions at LHC Energy
Creators: name: Braun-Munzinger, P.
name: Redlich, K.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider the charmonium production in thermalized hadronic medium created in ultrarelativistic heavy ion collisions at LHC energy. The calculations for the secondary $J/ψ$ and $ψ^,$ production by $D\bar D$ annihilation are performed within a kinetic model taking into account the space-time evolution of a longitudinally and transversely expanding medium. We show that the secondary charmonium production appears almost entirely during the mixed phase and it is very sensitive to the charmonium dissociation cross section with co-moving hadrons. Within the most likely scenario for the dissociation cross section of the $J/ψ$ mesons their regeneration in the hadronic medium will be negligible. The secondary production of $ψ^,$ mesons however, due to their large cross section above the threshold, can substantially exceed the primary yield.
description: ps file 11 p
Bovine mitochondrial protein synthesis elongation factors. Identification and initial characterization of an elongation factor Tu-elongation factor TS complex
Creators: name: Spremulli, L L
name: Schwartzbach, C J
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: Animal mitochondrial protein synthesis factors elongation factor (EF) Tu and EF-Ts have been purified as an EF-Tu.Ts complex from crude extracts of bovine liver mitochondria. The mitochondrial complex has been purified 10,000-fold to near homogeneity by a combination of chromatographic procedures including high performance liquid chromatography. The mitochondrial EF-Tu.Ts complex is very stable and cannot be dissociated even in the presence of high concentrations of guanine nucleotides. No guanine nucleotide binding to this complex can be observed in the standard nitrocellulose filter binding assay. Mitochondrial EF-Ts activity can be detected by its ability to facilitate guanine nucleotide exchange with Escherichia coli EF-Tu. The EF-Tumt exhibits similar levels of activity on isolated mammalian mitochondrial and E. coli ribosomes, but displays minimal activity on Euglena gracilis chloroplast 70 S ribosomes and has no detectable activity on wheat germ cytoplasmic ribosomes. In contrast to the bacterial EF-Tu and the EF-Tu from the chloroplast of E. gracilis, the ability of the mitochondrial factor to catalyze polymerization is not inhibited by the antibiotic kirromycin.
Theory of Z boson decays
Creators: name: Novikov, V. A.
name: Okun, L. B.
name: Rozanov, A. N.
name: Vysotsky, M. I.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The precision data on Z boson decays from LEP-I and SLC colliders are compared with the predictions based on the Minimal Standard Theory. The Born approximation of the theory is based on three most accurately known observables: G_mu -- the four fermion coupling constant of muon decay, m_Z -- the mass of the Z boson, and alpha(m_Z) -- the value of the running fine structure constant at the scale of m_Z. The electroweak loop corrections are expressed, in addition, in terms of the masses of higgs, m_H, of the top and bottom quarks, m_t and m_b, and of the strong interaction constant alpha_s(m_Z). The main emphasis of the review is focused on the one-electroweak-loop approximation. Two electroweak loops have been calculated in the literature only partly. Possible manifestations of new physics are briefly discussed.
description: 80 pages, 16 figures, accepted in Reports on Progress in Physics
Additional file 1: of Evaluation of whole-genome sequencing for outbreak detection of Verotoxigenic Escherichia coli O157:H7 from the Canadian perspective
Creators: name: Rumore, Jillian
name: Lorelee Tschetter
name: Kearney, Ashley
name: Kandar, Rima
name: McCormick, Rachel
name: Walker, Matthew
name: Christy-Lynn Peterson
name: Aleisha Reimer
name: Celine Nadon
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified

description: BioProject and BioSample information for the 250 isolates used in the study. (DOCX 33 kb)
Dehydrogenase-dependent ethanol metabolism in deer mice (Peromyscus maniculatus) lacking cytosolic alcohol dehydrogenase. Reversibility and isotope effects in vivo and in subcellular fractions
Creators: name: INGELMAN-SUNDBERG, M
name: HANDLER, J.
name: NORSTEN, C
name: EKSTROM, G
name: CRONHOLM, T
name: THURMAN, R.
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: Elimination of [2H]ethanol in vivo as studied by gas chromatography/mass spectrometry occurred at about half the rate in deer mice reported to lack alcohol dehydrogenase (ADH-) compared with ADH+ deer mice and exhibited kinetic isotope effects on Vmax and Km (D(V/K] of 2.2 +/- 0.1 and 3.2 +/- 0.8 in the two strains, respectively. To an equal extent in both strains, ethanol elimination was accompanied by an ethanol-acetaldehyde exchange with an intermolecular transfer of hydrogen atoms, indicating the occurrence of dehydrogenase activity. This exchange was also observed in perfused deer mouse livers. Based on calculations it was estimated that at least 50% of ethanol elimination in ADH- deer mice was caused by the action of dehydrogenase systems. NADPH-supported cytochrome P-450-dependent ethanol oxidation in liver microsomes from ADH+ and ADH- deer mice was not stereoselective and occurred with a D(V/K) of 3.6. The D(V/K) value of catalase-dependent oxidation was 1.8, whereas a kinetic isotope effect of cytosolic ADH in the ADH+ strain was 3.2. Mitochondria from both ADH+ and ADH- deer mice catalyzed NAD+-dependent ethanol oxidation and NADH-dependent acetaldehyde reduction. The kinetic isotope effects of NAD+-dependent ethanol oxidation in the mitochondrial fraction from ADH+ and ADH- deer mice were 2.0 +/- 0.1 and 2.3 +/- 0.3, respectively. The results indicate only a minor contribution by cytochrome P-450 to ethanol elimination, whereas the isotope effects are consistent with ethanol oxidation by the catalase-H2O2 system in ADH- deer mice in addition to the dehydrogenase systems.
What is the Thouless Energy for Ballistic Systems?
Creators: name: Altland, Alexander
name: Gefen, Yuval
name: Montambaux, Gilles
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The Thouless energy, $\Ec$ characterizes numerous quantities associated with sensitivity to boundary conditions in diffusive mesoscopic conductors. What happens to these quantities if the disorder strength is decreased and a transition to the ballistic regime takes place? In the present analysis we refute the intuitively plausible assumption that $\Ec$ loses its meaning as an inverse diffusion time through the system at hand, and generally disorder independent scales take over. Instead we find that a variety of (thermodynamic) observables are still characterized by the Thouless energy.
description: 4 pages REVTEX, uuencoded file. To appear in Physical Review Letters
Evidence of Coulomb interaction induced Lifshitz transition and robust hybrid Weyl semimetal in Td MoTe2
Creators: name: Xu, N.
name: Wang, Z. W.
name: Magrez, A.
name: Bugnon, P.
name: Berger, H.
name: Matt, C. E.
name: Strocov, V. N.
name: Plumb, N. C.
name: Radovic, M.
name: Pomjakushina, E.
name: Conder, K.
name: Dil, J. H.
name: Mesot, J.
name: Yu, R.
name: Ding, H.
name: Shi, M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using soft x-ray angle-resolved photoemission spectroscopy we probed the bulk electronic structure of Td MoTe2. We found that on-site Coulomb interaction leads to a Lifshitz transition, which is essential for a precise description of the electronic structure. A hybrid Weyl semimetal state with a pair of energy bands touching at both type-I and type-II Weyl nodes is indicated by comparing the experimental data with theoretical calculations. Unveiling the importance of Coulomb interaction opens up a new route to comprehend the unique properties of MoTe2, and is significant for understanding the interplay between correlation effects, strong spin-orbit coupling and superconductivity in this van der Waals material.
description: submitted on May 02 2018, to appear in PRL
Spectrum generating algebra of the symmetric top
Creators: name: Bijker, R.
name: Leviatan, A.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We consider an algebraic treatment of a three-body system. We develop the formalism for a system of three identical objects and show that it provides a simultaneous description of the vibrational and rotational excitations of an oblate symmetric top.
description: 5 pages, talk at `15th International Conference on Few-Body Problems in Physics', Groningen, July 22-26, 1997
Dual simulation of the 2d U(1) gauge Higgs model at topological angle $θ= π\,$: Critical endpoint behavior
Creators: name: Gattringer, Christof
name: Göschl, Daniel
name: Sulejmanpasic, Tin
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We simulate the 2d U(1) gauge Higgs model on the lattice with a topological angle $θ$. The corresponding complex action problem is overcome by using a dual representation based on the Villain action appropriately endowed with a $θ$-term. The Villain action is interpreted as a non-compact gauge theory whose center symmetry is gauged and has the advantage that the topological term is correctly quantized so that $2π$ periodicity in $θ$ is intact. Because of this the $θ= π$ theory has an exact $Z_2$ charge-conjugation symmetry $C$, which is spontaneously broken when the mass-squared of the scalars is large and positive. Lowering the mass squared the symmetry becomes restored in a second order phase transition. Simulating the system at $θ= π$ in its dual form we determine the corresponding critical endpoint as a function of the mass parameter. Using a finite size scaling analysis we determine the critical exponents and show that the transition is in the 2d Ising universality class, as expected.
Effect of guanine nucleotides on the conformation and stability of chloroplast elongation factor Tu
Creators: name: The University of North Carolina at Chapel Hill University Libraries
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1989

description: The effect of guanine nucleotides and kirromycin on the conformation and stability of the chloroplast elongation factor Tu (EF-Tuchl) from Euglena gracilis has been investigated. Free EF-Tuchl is quite thermolabile but the protein is greatly stabilized by guanine nucleotides. The temperature dependence of the thermal inactivation of EF-Tuchl was used to calculate the amount of stabilization energy conferred by the guanine nucleotides. GDP increases the activation energy for the denaturation process by 77 kcal/mol while GTP increases the activation energy by 51 kcal/mol. The difference in heat stability of free EF-Tuchl and the EF-Tuchl.GDP complex was used to determine a dissociation constant of 1.3 x 10(-7) M at 37 degrees C. The temperature dependence of the dissociation constant allowed the calculation of a delta H degree obsd of -55 kcal/mol and a delta S degree obsd of -146 cal/(mol degree) for GDP binding to EF-Tuchl.EF-Tuchl was found to have a trypsin-sensitive region similar to that observed for Escherichia coli EF-Tu. This loop region was protected by GTP and kirromycin but not by GDP.
Berry Phase of Dirac Nodal Line Semimetal in Single-Component Molecular Conductor
Creators: name: Suzumura, Yoshikazu
name: Yamakage, Ai
Publisher: name: arXiv
Year: 2018
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Berry phase and curvature are studied for the Dirac nodal line semimetal of single-component molecular conductor [Pd(dddt)$_2$]. Using two-band model on the basis of a tight-binding model, it is shown that the Berry curvature, $\bm{B}(\bm{k})$, exists along a loop of the nodal line, on which the Berry phase is obtained from surface integral of $\bm{B}(\bm{k})$. The Berry phase, which is called Zak phase, is also calculated from one-dimensional integral of the Berry connection along a line between two equivalent points of boundaries of Brillouin zone. The possible experiment is discussed in terms of the Berry phase.
description: 5 pages, 3 figures
Neutrinos: Heralds of New Physics
Creators: name: Ramond, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The central role of neutrinos in the determination of fundamental interactions is reviewed. The recent SuperKamiokande discovery of neutrino mass gives an {\it aper\c cu} of physics at short distances, and tests theories of flavor. Quark-lepton symmetries, derived from grand unification and/or string theories, can help determine the standard model parameters in the neutrino sector.
description: Invited Talk at TAUP99, Paris, September 1999. Latex, 10 pages
Kripke Semantics of the Perfectly Transparent Equilibrium
Creators: name: Fourny, Ghislain
Publisher: name: arXiv
Year: 2018
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: J.4
subject: 91A10

description: The Perfectly Transparent Equilibrium is algorithmically defined, for any game in normal form with perfect information and no ties, as the iterated deletion of non-individually-rational strategy profiles until at most one remains. In this paper, we characterize the Perfectly Transparent Equilibrium with adapted Kripke models having necessary rationality, necessary knowledge of strategies as well as eventual logical omniscience. Eventual logical omniscience is introduced as a weaker version of perfect logical omniscience, with logical omniscience being quantized and fading away counterfactually. It is the price to pay for necessary factual omniscience and necessary rationality: we conjecture that epistemic omniscience, logical omniscience and necessary rationality form an impossibility triangle. We consider multimodal classes of Kripke structures, with respect to agents, but also in the sense that we have both epistemic and logical accessibility relations. Knowledge is defined in terms of the former, while necessity is defined in terms of the latter. Lewisian closest-state functions, which are not restricted to unilateral deviations, model counterfactuals. We use impossible possible worlds à la Rantala to model that some strategy profiles cannot possibly be reached in some situations. Eventual logical omniscience is then bootstrapped with the agents' considering that, at logically possible, but non-normal worlds à la Kripke, any world is logically accessible and thus any deviation of strategy is possible. As in known in literature, under rationality and knowledge of strategies, these worlds characterize individual rationality. Then, in normal worlds, higher levels of logical omniscience characterize higher levels of individual rationality, and a high-enough level of logical omniscience characterizes, when it exists, the Perfectly Transparent Equilibrium.
description: Working paper