cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Alu RNA transcribed in vitro binds the 68-kDa subunit of the signal recognition particle
Creators: name: Andrews, Phyllis
name: Kole, R
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1987

description: Antibodies directed against the 68-kDa subunit of signal recognition particle (SRP) precipitate an Alu RNA X protein complex formed during in vitro transcription of a plasmid containing an Alu family sequence. The same Alu RNA X protein complex is precipitated by anti-Alu sera from certain patients with systemic lupus erythematosus and related autoimmune diseases (Kole, R., Fresco, L. D., Keene, J. D., Cohen, P. L., Eisenberg, R. A., and Andrews, P. G. (1985) J. Biol. Chem. 260, 11781-11786). Similarly to anti-SRP antibodies human, anti-Alu sera precipitate SRP from HeLa cell extract and detect a 68-kDa SRP subunit on immunoblots. These results indicate that the Alu antigen and the 68-kDa SRP subunit are the same polypeptide.
The Cosmic Microwave Background and the Stellar Initial Mass Function
Creators: name: Jermyn, Adam S.
name: Steinhardt, Charles L.
name: Tout, Christopher A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We argue that an increased temperature in star-forming clouds alters the stellar initial mass function to be more bottom-light than in the Milky Way. At redshifts $z \gtrsim 6$, heating from the cosmic microwave background radiation produces this effect in all galaxies, and it is also present at lower redshifts in galaxies with very high star formation rates (SFRs). A failure to account for it means that at present, photometric template fitting likely overestimates stellar masses and star formation rates for the highest-redshift and highest-SFR galaxies. In addition this may resolve several outstanding problems in the chemical evolution of galactic halos.
description: 9 pages, 5 figures. Published in MNRAS. Added further references
Natural Maximal ny_my - ny_tau Mixing
Creators: name: Wetterich, C.
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The naturalness of maximal mixing between myon- and tau-neutrinos is investigated. A spontaneously broken nonabelian generation symmetry can explain a small parameter which governs the deviation from maximal mixing. In many cases all three neutrino masses are almost degenerate. Maximal ny_my-ny_tau-mixing would indicate that the leading contribution to the light neutrino masses arises from the expectation value of a heavy weak triplet rather than from the seesaw mechanism. In this scenario the deviation from maximal mixing is predicted to be less than about 1%.
description: 13 pages,LaTex
An enzyme(s) that converts glutaminyl-peptides into pyroglutamyl-peptides. Presence in pituitary, brain, adrenal medulla, and lymphocytes.
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: 1987

description: The mechanism for the post-translational conversion of glutamine to pyroglutamic acid on the N terminus of newly synthesized peptides and proteins is unknown. An assay is reported that permits measurement of the rate of conversion of Gln-His-Pro-NH2 to pyroGlu-His-Pro-NH2 (TRH). Using this assay, we demonstrate that the spontaneous cyclization of the N-terminal glutamine of this peptide occurs only slowly under physiological conditions. Furthermore, we describe the presence in rat brain, porcine pituitary, and human B lymphocytes of an enzyme(s) which converts Gln-His-Pro-NH2 into pyroGlu-His-Pro-NH2. The enzyme(s) appears to be a glycoprotein, is maximally active at neutral pH, has a Mr of 55,000, and contains catalytically significant sulfhydryl groups. The product of the enzymatic reaction was confirmed by high resolution fast atom bombardment-mass spectrometry. In preliminary studies, we find that over 90% of the enzyme in bovine adrenal medulla is contained in the soluble chromaffin vesicle fraction. These findings indicate that in vivo the post-translational conversion of a glutaminyl-peptide into a pyroglutamyl-peptide is neither spontaneous nor abiotic as has been previously proposed.
MOESM1 of Near-seafloor magnetic mapping of off-axis lava flows near the Kairei and Yokoniwa hydrothermal vent fields in the Central Indian Ridge
Creators: name: Fujii, Masakazu
name: Okino, Kyoko
Publisher: name: figshare
Year: 2018
Subjects: subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: Evolutionary Biology
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Additional file 1: Figure S1. Analysis of observed magnetic anomaly along the 6K#1171 track assuming a magnetization direction parallel to the geocentric axial-dipole field; an inclination of − 43° and a declination of 0°. From top to bottom: observed (red line) and synthetic (blue line) magnetic anomaly intensity of x, y, and z components, magnetization, phase, vehicle altitude, and seafloor/vehicle geometry. Black and gray circles are those with high coherency of >0.5 and from 0.3–0.5 on both the x and z components, respectively. The profile was divided into four sections depending on the survey direction, which is essential for two-dimensional analysis of magnetic anomalies. WL, window length.
Bacteria form intracellular free radicals in response to paraquat and streptonigrin. Demonstration of the potency of hydroxyl radical
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: 1987

description: The generation of oxygen reduction products by Neisseria gonorrhoeae FA1090 upon exposure to streptonigrin (SNG) and paraquat (PQ2+) and their toxicity was examined. N. gonorrhoeae exhibited maximal cyanide-insensitive respiration, which was employed as an indicator of superoxide (O2-) formation, in the presence of 0.064 mM streptonigrin and 90 mM PQ2+, respectively. Using the concentrations of SNG and PQ2+ described above, complete lethality (greater than 10(8) cells/ml) was observed among cells exposed to SNG, whereas PQ2+ reduced viability by only 3 logs. In an attempt to determine the oxygen radical species generated by gonococci when exposed to SNG, dimethyl sulfoxide, Fe3+, KCN, and the spin trap 5,5-dimethyl-1-pyrroline-N-oxide (DMPO), we were able to detect .OH manifested as the methyl adduct (DMPO-CH3). The production of the latter species was not inhibited by catalase, suggesting intracellular .OH generation. When PQ2+ was substituted for SNG, only low levels of DMPO-CH3 were observed, the production of which ceased within 8 min. SNG and PQ2+, added to a O2(-)- generating system in the presence of Fe3+, promoted increased .OH generation. The iron chelator diethyl-enetriaminepentaacetic acid enhanced the generation of spin-trapped .OH and O2- in the presence of PQ2+. The addition of catalase to this system, however, eliminated the DMPO-CH3 signal, showing that the .OH in this system was extracellular. PQ2+-mediated generation of extracellular .OH in the presence of Fe3+-diethylenetriaminepentaacetic acid EDTA did not enhance the killing of gonococci by PQ2+. These data show that the lethality of SNG relative to PQ2+ is due to the inherent ability of SNG to catalyze the formation of critical levels of intracellular .OH, detectable through the use of spin trapping techniques.
Quantum Tunneling in Nuclear Fusion
Creators: name: Balantekin, A. B.
name: Takigawa, N.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recent theoretical advances in the study of heavy ion fusion reactions below the Coulomb barrier are reviewed. Particular emphasis is given to new ways of analyzing data, such as studying barrier distributions; new approaches to channel coupling, such as the path integral and Green function formalisms; and alternative methods to describe nuclear structure effects, such as those using the Interacting Boson Model. The roles of nucleon transfer, asymmetry effects, higher-order couplings, and shape-phase transitions are elucidated. The current status of the fusion of unstable nuclei and very massive systems are briefly discussed.
description: To appear in the January 1998 issue of Reviews of Modern Physics. 13 Figures (postscript file for Figure 6 is not available; a hard copy can be requested from the authors). Full text and figures are also available at http://nucth.physics.wisc.edu/preprints/
Lichtstabile, bei Bedarf lichtabbaubare Polymere auf Basis von 9,10-Dialkoxyanthracenen – Synthese und Anwendung
Creators: name: Becker, Fabian Paul Alexander
Publisher: name: Karlsruhe
Year: 2019
Subjects: Polymer
on-demand abbaubare Polymere
Lichtabbaubare Polymere
Abbaubare Polymere
Anthracene
NMR
Stufenwachstumspolymerisationen
ADMET
CuAAC
Spincoating
EHD Co-Jetting
Nachhaltige Polymere

description: In den letzten Jahren ist die Menge an entstehenden Kunststoffabfällen immer größer geworden, dies hat das Interesse an abbaubaren Polymeren gesteigert. Besonders im Fokus stehen hierbei lichtabbaubare Polymere. Nachteilig ist, dass diese bisher mit UV-Licht abgebaut werden, was einen Einsatz in Alltagssituationen verhindert. Die zellschädigende Wirkung von UV-Licht verhindert oftmals auch einen Einsatz lichtabbaubarer Polymere in der Medizintechnik, hier könnten mit sichtbarem Licht abbaubare Polymere neue Behandlungsmöglichkeiten schaffen. Die vorliegende Arbeit besteht im Wesentlichen aus drei Teilen, der Synthese, dem Abbau sowie der Anwendung lichtstabiler und nur bei Bedarf lichtabbaubarer Polymere. Im ersten Teil dieser Arbeit wird die ein- bis dreistufige Synthese von α,ω-Dienen, Diaziden und Dialkinen vorgestellt. Aus diesen wurden über CuAAC- und ADMET- Polymerisationen lichtstabile, aber bei Bedarf mit grünem Licht abbaubare Polymere mit 9,10-Dialkoxyanthracenen im Polymerrückgrat hergestellt. Im zweiten Teil dieser Arbeit wird in 1H-NMR-spektroskopischen Untersuchungen gezeigt, dass die Polymere nur bei Bedarf lichtabbaubar sind. Für den Abbau wird ein Photosensitizer benötigt, welcher die für die Spaltung notwenige Energie aus Licht auf Sauerstoff transferiert. Der so gebildete Singulett-Sauerstoff addiert unter Bildung des endo-Peroxids an das Polymer. Dieses Poly-endo-Peroxid wird durch den Photosensitizer letztendlich säurekatalytisch abgebaut. Ebenfalls gezeigt wird die Möglichkeit, die Polymere mit Methylenblau unter Bestrahlung von rotem Licht abzubauen. Der dritte Teil dieser Arbeit widmet sich der Anwendung der hergestellten Polymere. Über elektrohydrodynamisches Co-Jetting wurden bikompartimentelle Mikrofasern hergestellt. Bei diesen besteht ein Kompartiment aus dem neu entwickelten, abbaubaren Polymer, das andere aus PLGA. Es wird gezeigt, dass nach dem Abbau des synthetisierten Polymers das PLGA-Kompartiment intakt bleibt. Weiterhin konnte an einem über Rotationsbeschichtung hergestellten Polymerdünnfilm gezeigt werden, dass sich die synthetisierten Polymere auch für die Fotolithographie eignen.
Cellular metabolism of 2', 3'-dideoxycytidine, a compound active against human immunodeficiency virus in vitro.
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: 1987

description: Mise au point sur certaines facettes importantes des investigations récentes en insistant sur la pathogénéicité potentielle des anti-ADN et sur la spécificité des anticorps capables d'un tel rôle.
Pheidole defecta
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole defecta

description: Pheidole defecta Santschi
Pheidole defecta Santschi 1923d: 54. Redescribed by B. Holldobler and E. O. Wilson 1992: 16.
Types Naturhist. Mus. Basel.
Etymology L defecta, fault, lack (significance unknown).
Diagnosis A unique but problematic species known only from the holotype major, tentatively placed in the pilifera group because of the 2-toothed hypostoma but equally well placed in the flavens group because of the overall habitus; the discovery of the minor may help settle the matter. Close in habitus to nasutoides (which is placed in the flavens group), but differing in promesonotal shape, smaller size of the propodeal spine and spiracle, mostly smooth and shiny body, much sparser pilosity, and different color. Measurements (mm) Holotype major: HW 1.10, HL 1.10, SL 0.64, EL 0.16, PW 0.56. Color Major: concolorous medium yellow.
Range Known only from the holotype major.
Biology Unknown.
figure Unique holotype, major. GUATEMALA (no further locality). Scale bar = 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 575
DNA damage at thymine N-3 abolishes base-pairing capacity during DNA synthesis
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: 1987

description: 3-Methylthymine was synthesized into DNA copolymers and deoxynucleoside triphosphate to study its effect on DNA synthesis by the Klenow fragment of Escherichia coli polymerase I and avian myeloblastosis virus reverse transcriptase. Both polymerases were greatly inhibited by template 3-methylthymine. In response to 3-methylthymine, misincorporation of dTTP increased slightly, but occurred only at low levels consistent with spontaneous misincorporation in vitro. Surprisingly, template 3-methylthymine resulted in a striking decrease in background misincorporation, relative to normal incorporation by the Klenow fragment, of dGTP and, to a lesser extent, of dATP and dCTP. The incorporation of 3-methyl-dTTP into DNA was studied using DNA sequencing technology. The Klenow fragment failed to incorporate 3-methyl-dTTP even at 1 mM. Reverse transcriptase incorporated 3-methyl-dTTP opposite adenine, cytosine, and thymine, but at only about 1/40,000th the efficiency of complementary deoxynucleoside triphosphate incorporation. Furthermore, synthesis generally stalled at sites of 3-methyl-thymine incorporation. From these results, we conclude that damage at the central hydrogen-bonding position of thymine abolishes its base-pairing capabilities during DNA synthesis.
Persian Writing Style
Creators: name: Hassani Jalilian
Publisher: name: Zenodo
Year: 2019
Subjects: شیوه‌ی نگارش زبان فارسی

description: سرمقاله ثبته آثاره ملّیه هر کشور یک ضرورت است! این روزها شیوه‌ی نگارش زبان فارسی توجه بسیاری را به خود جلب کرده است. روشی نو و مبتنی بر گفتار که جوانان و فعالیت‌ آنها در فضای مجازی بیشترین سهم را در اشاعه‌ی آن داشته‌اند: «کتابه ریاضیه من دسته توه؟». «ه/کسره» و بایدها و نبایدهای آن! حال، برخی با بی‌دقتی از آن می‌گذرند و برخی از شیوه‌ی نوینِ استفاده از آن نگرانند. برخی احساس می‌کنند بیش از حد در بند چارچوب‌های دست‌و‌پاگیر قرار گرفته‌اند و برخی احساس می‌کنند نوشتارِ زبانِ ملی‌شان به خطر افتاده است. این شیوه اما پیامدهای خود را نیز دارد که برجسته‌ترین آن خوانشی جدید از نوشتار است، طوری که مسافری در تاکسی از راننده درخواست کرد وی را «پُل اول» پیاده کند؛ جایی که تابلو «پله اول» را نشان می‌داد! کشمکش‌ها و بحث‌های بسیاری از طرف حامیانِ رعایتِ «ه/کسره» و افرادی که خود را ملزم به رعایتِ آن نمی‌دانند در فضاهای مجازی مشاهده می‌شود. چه بسا افرادی که برای جلوگیری از اظهارنظر دیگران پیشاپیش توضیح می‌دهند: « «ه/کسره» را رعایت نمی‌کنم، گیر ندهید!». گاهی مشاهده می‌شود افرادی نیز بیش از حد محتاط شده‌اند و در مواردی از «کسره» به جای «ه» استفاده می‌کنند: «مادرم رفتِ و من تنها شدم». این امر می‌تواند دلایل بسیار داشته باشد. می‌توان گفت یکی از مسائلی که موجب چنین نگارشی شده است، نزدیک شدنِ زبان گفتار به زبان نوشتار است. بُعد روانشناختیِ این مسأله نیز می‌تواند تأثیرگذار باشد؛ سرعت در ارسالِ پیام و متن در فضای مجازی و متمرکز نبودن در حین نگارش که کم‌کم منجر به یک عادت روزمره شده است. این مسأله اما برای جامعه‌ی زبان‌شناسان می‌تواند یک هشدار یا یک نشانه باشد. هشدار برای تغییر نامناسبِ زبان فارسی؛ یا نشانه‌ای از یک مرحله‌ی گذار که در آن شاهد تغییر تدریجیِ نوشتارِ زبان فارسی هستیم. سرعت ترویجِ این شیوه اما به حدی است که جای تعجب نیست اگر روزی بنویسیم: «کتابه زبانشناسیه نقشگراییه هلیدی کتابه ارزشمندیِ»!
description: Alzahra University
Stability, dynamical properties and melting of a classical bi-layer Wigner Crystal
Creators: name: Goldoni, G.
name: Peeters, F. M.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: We investigate the stability, the dynamical properties and melting of a two-dimensional (2D) Wigner crystal (WC) of classical Coulombic particles in a bi-layer structure. Compared to the single-layer WC, this system shows a rich phase diagram. Five different crystalline phases are stable; the energetically favoured structure can be tuned by changing either the inter-layer distance or the particle density. Phase boundaries consist of both continuous and discontinuous transitions. We calculated the phonon excitations of the system within the harmonic approximation and we evaluated the melting temperature of the bi-layer WC by use of a modified Lindemann criterion, appropriate to 2D systems. We minimized the harmonic free-energy of the system with respect to the lattice geometry at different values of temperature/inter-layer distance and we found no temperature-induced structural phase transition.
description: To appear in Phys. Rev. B. 21 pages written in REVTEX + 9 postscript figures
MAHALO Deep Cluster Survey II. Characterizing massive forming galaxies in the Spiderweb protocluster at z=2.2
Creators: name: Shimakawa, Rhythm
name: Koyama, Yusei
name: Rottgering, Huub J. A.
name: Kodama, Tadayuki
name: Hayashi, Masao
name: Hatch, Nina A.
name: Dannerbauer, Helmut
name: Tanaka, Ichi
name: Tadaki, Ken-ichi
name: Suzuki, Tomoko L.
name: Fukagawa, Nao
name: Cai, Zheng
name: Kurk, Jaron D.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: This paper is the second in a series presenting the results of our deep H$α$-line survey towards protoclusters at $z>2$, based on narrow-band imaging with the Subaru Telescope. This work investigates massive galaxies in a protocluster region associated with a radio galaxy (PKS 1138$-$262), the Spiderweb galaxy, at $z=2.2$. Our 0.5 mag deeper narrow-band imaging than previous surveys collects a total of 68 H$α$ emitters (HAE). 17 out of the 68 are newly discovered protocluster members. First, a very high characteristic stellar mass of M$_\star^\ast=10^{11.73}$ M$_\odot$ is measured from a Schechter function fit to the mass distribution of HAEs. Together with the Chandra X-ray data, we find that four out of six massive HAEs (M$_\star>10^{11}$ M$_\odot$) show bright X-ray emission, suggesting that they host active galactic nuclei (AGNs). Their mass estimates, therefore, would be affected by the nuclear emission from AGNs. Notably, the X-ray detected HAEs are likely positioned near the boundary between star-forming and quiescent populations in the rest-frame $UVJ$ plane. Moreover, our deep narrow-band data succeed in probing the bright H$α$ (+[Nii]) line nebula of the Spiderweb galaxy extending over $\sim100$ physical kpc. These results suggest that the massive galaxies in the Spiderweb protocluster are on the way to becoming the bright red sequence objects seen in local galaxy clusters, where AGNs might play an essential role in their quenching processes. Though a more statistical database is needed to build a general picture.
description: 22 pages, 17 figures, accepted for publication in the MNRAS
The Lifetimes of Heavy Flavour Hadrons - a Case Study in Quark-Hadron Duality
Creators: name: Bigi, I. I.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The status of heavy quark expansions for charm and beauty lifetime ratios is reviewed. Taking note of the surprising semiquantitative success of this description for charm hadrons I interprete the new data on $τ(D_s)$ and re-iterate the call for more precise measurements of $τ(Ξ_c^{0,+})$ and $τ(Ω_c)$. A slightly larger $B^-$ than $B_d$ lifetime is starting to emerge as predicted; the largest lifetime difference in the beauty sector, namely in $τ(B_c)$ vs. $τ(B)$ has correctly been predicted; the problem posed by the short $Λ_b$ lifetime remains. The need for more accurate data also on $τ(B_s)$ and $τ(Ξ_b^{-,0})$ is emphasized. I discuss quark-hadron duality as the central theoretical issue at stake here.
description: 12 pages, LATEX, no figures, 2 tables; slightly extended version of Invited Talk given at the 3rd International Conference on B Physics and CP Violation, Taipeh, Taiwan, Dec. 3 - 7, 1999
DNA helicase II of Escherichia coli. Characterization of the single-stranded DNA-dependent NTPase and helicase activities
Creators: name: Matson, S W
name: George, J W
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1987

description: Escherichia coli helicase II has been purified to near homogeneity from cells harboring a multicopy plasmid containing the structural gene for helicase II, uvrD. In this paper a detailed description of the single-stranded DNA-dependent nucleoside 5'-triphosphatase and helicase reactions catalyzed by helicase II is presented. The results of this study suggest that nucleoside 5'-triphosphate hydrolysis provides the energy required for translocation of the enzyme along single-stranded DNA. Measurements of the rate of ATP hydrolysis using a variety of single-stranded DNAs of known structure and length suggest a processive translocation mechanism for helicase II. Single-stranded DNA coated with either Escherichia coli single-stranded DNA binding protein (SSB) or bacteriophage T4 gene 32 protein fails to support helicase II ATPase activity. Moreover, helicase II is apparently unable to displace a molecule of bound SSB protein from single-stranded DNA when it is encountered in the process of translocation along a single-stranded DNA effector. The helicase reaction has been characterized using an in vitro strand displacement helicase assay. The helicase reaction requires concomitant nucleoside 5'-triphosphatase hydrolysis that is satisfied by the hydrolysis of either rATP or dATP. As the length of duplex DNA present in the partial duplex helicase substrate is increased from 71 base pairs to 343 base pairs, the fraction of duplex DNA molecules that are unwound by helicase II decreases in the absence of any accessory proteins. However, the total number of base pairs of duplex DNA unwound depends primarily on the amount of enzyme added to the helicase reaction and not on the length of the duplex DNA present in the partial duplex DNA substrate. These data suggest the number of base pairs of duplex DNA unwound is directly proportional with the concentration of helicase II in the reaction mixture. In addition, the rate of the unwinding reaction is independent of the length of the duplex DNA available for unwinding. Helicase II has been shown to dissociate from single-stranded DNA molecules infrequently acting as an ATPase. However, the enzyme dissociates from partial duplex helicase substrates more frequently. This suggests a more distributive reaction mechanism on duplex DNA than was observed on single-stranded DNA substrates. The fraction of 343-base pair partial duplex DNA molecules unwound by helicase II can be increased by the addition of appropriate concentrations of E. coli SSB to the reaction. This suggests that helicase II and SSB may act in a concerted reaction to unwind duplex DNA.
Pheidole elecebra
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole elecebra

description: Pheidole elecebra (Wheeler)
Sympheidole elecebra Wheeler 1904a: 8. Combination in Pheidole by D. R. Smith 1979.
Types Mus. Comp. Zool. Harvard.
Etymology L elecebra, freeloaders, a social parasite.
Diagnosis A very small member of the pilifera group, a permanent, workerless social parasite of Pheidole ceres, distinguishable at once by the enormous curved, hornlike lateral extensions of the postpetiolar node; otherwise overall normal in appearance for a Pheidole queen.
Measurements (mm) Syntype queen: HW 0.58, HL 0.60, EL 0.22 (SL and PW not measured). Color Queen: light brown.
Range Known from several records in Colorado between 2000 and 2200 m; the preferred habitat is the same as that of its host, that is, primarily pinyon-cedar-oak woodland (Gregg 1963).
Biology Wheeler (1904a, 1910b), from an examination of a living host colony and its elecebra guests, concluded that the inquiline behaves like Anergates atratulus of Europe in preventing the host colony from producing new reproductives (queens and males) of its own. Contrary evidence was obtained by Stefan Cover, who rediscovered the species in 1994. One mixed colony he collected near North Cheyenne, Colorado, contained a dealate elecebra queen, many winged elecebra queens, and queen pupae of the parasite, but also abundant host (ceres) minor and major brood, along with 400-600 adult host minors and majors; this combination constitutes virtual proof that a reproducing host queen was also present. A second colony contained beyond 200-300 adult host minors and majors, only adult parasite males and parasite male pupae. This combination suggests the absence of a host queen.
figure Queen. COLORADO: 2.2 km north of North Cheyenne, Colorado Springs, 2200 m (Stefan Cover), compared with syntype. (Type Locality: Manitou, Colorado, 2130 m, W. M. Wheeler.) Scale bar = 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 576
Quark propagator, instantons and gluon propagator
Creators: name: Kisslinger, L. S.
name: Aw, M.
name: Harey, A.
name: Linsuain, O.
Publisher: name: arXiv
Year: 1999
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Schwinger-Dyson formalism is used to check the consistency of instanton model solutions for the quark propagator with recent models of confining gluon propagators. We find that the models are not consistent. A major discrepancy is the absence of a vector condensate in the instanton model that is present in the solutions with nonperturbative confining gluons.
description: Latex file, no figures
Measuring surface charge: why experimental characterization and molecular modeling should be coupled
Creators: name: Hartkamp, Remco
name: Biance, Anne-Laure
name: Fu, Li
name: Dufrêche, Jean-François
name: Bonhomme, Oriane
name: Joly, Laurent
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Surface charge controls many static and dynamic properties of soft matter and micro/nanofluidic systems, but its unambiguous measurement forms a challenge. Standard characterization methods typically probe an effective surface charge, which provides limited insight into the distribution and dynamics of charge across the interface, and which cannot predict consistently all surface-charge-governed properties. New experimental approaches provide local information on both structure and transport, but models are typically required to interpret raw data. Conversely, molecular dynamics simulations have helped showing the limits of standard models and developing more accurate ones, but their reliability is limited by the empirical interaction potentials they are usually based on. This review highlights recent developments and limitations in both experimental and computational research focusing on the liquid-solid interface. Based on recent studies, we make the case that coupling of experiments and simulations is pivotal tomitigate methodological shortcomings and address open problems pertaining to charged interfaces.
description: Current Opinion in Colloid & Interface Science (2018)
Role of retardation in 3-D relativistic equations
Creators: name: Lahiff, A. D.
name: Afnan, I. R.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Equal-time Green's function is used to derive a three-dimensional integral equation from the Bethe-Salpeter equation. The resultant equation, in the absence of anti-particles, is identical to the use of time-ordered diagrams, and has been used within the framework of $ϕ^2σ$ coupling to study the role of energy dependence and non-locality when the two-body potential is the sum of $σ$-exchange and crossed $σ$ exchange. The results show that non-locality and energy dependence make a substantial contribution to both the on-shell and off-shell amplitudes.
description: 17 pages, RevTeX; 8 figures. Accepted for publication in Phys. Rev. C56 (Nov. 97)
Instantons and the singlet-coupling in the chiral quark model
Creators: name: Cheng, T. P.
name: Li, Ling-Fong
Publisher: name: arXiv
Year: 1998
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Chiral quark model with a broken-U(3) flavor symmetry can be interpreted as the effective theory of the instanton-dominated non-perturbative QCD. This naturally suggests the possibility of a negative singlet/octet coupling ratio, which has been found, in a previous publication, to be compatible with the phenomenological description of the nucleon spin-flavor structure.
description: 9 pages
Pheidole gilvescens
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole gilvescens

description: Pheidole gilvescens Creighton and Gregg
Pheidole gilvescens Creighton and Gregg 1955: 5. First available use of Pheidole xerophila subsp. tucsonica var. gilvescens Wheeler 1908h: 448, unavailable name (quadrinomial).
Types Mus. Comp. Zool. Harvard; Amer. Mus. Nat. Hist.
etymology L gilvescens, pale yellow, pertaining to the color of the minor, distinguishing the species from xerophila.
diagnosis A small, large-eyed member of the pilifera group, close to xerophila and distinguished from it as follows. Major: body almost entirely reddish yellow; postpetiolar node transversely oval in shape; sides of pronotum carinulate. Minor: entirely yellow (as opposed to yellowish brown).
With xerophila, the entire head of the major tapers conspicuously from midlevel to the occiput in side view.
Measurements (mm) Lectotype major: HW 1.42, HL 1.48, SL 0.66, EL 0.22, PW 0.66.
Paralectotype minor: HW 0.58, HL 0.80, SL 0.52, EL 0.18, PW 0.32.
color Major: body and appendages dark reddish yellow; gaster partly light brown.
Minor: body medium yellow, appendages pale yellow.
Range Creighton and Gregg (1955) and Wheeler and Wheeler (1986g) report the species (and I have mostly confirmed) as occurring from south-central Arizona through southern Nevada to the eastern slope of the California Sierras.
biology In southern California, Snelling and George (1979) found gilvescens common at 150-1500 m in grassland, creosote bush scrub, wash woodlands, and Joshua tree woodlands. Small crater nests are built in sand and are often surrounded by chaff. The colonies contain up to 500 workers. The ants are primarily granivorous but also collect arthropods, apparently as scavengers. Repletes are occasionally found. Foraging begins at dusk, continues through the night, and ends early in the morning. Winged queens have been found in nests in late May, and males in May and September.
Figure Lectotype, major. ARIZONA: Tucson (W. M. Wheeler). Scale bar = 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 577
Epidermal growth factor stimulates the rapid accumulation of inositol (1,4,5)-trisphosphate and a rise in cytosolic calcium mobilized from intracellular stores in A431 cells
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: 1987

description: Exposure of A431 human epidermoid carcinoma cells to epidermal growth factor (EGF), bradykinin, and histamine resulted in a time- and concentration-dependent accumulation of the inositol phosphates (InsP) inositol monophosphate, inositol bisphosphate, and inositol trisphosphate (InsP3). Maximal concentrations of EGF (316 ng/ml; approximately 50 nM), bradykinin (1 microM), and histamine (1 mM) resulted in 3-, 6-, and 3-fold increases, respectively, in the amounts of inositol phosphates formed over a 10-min period. The K0.5 values for stimulation were approximately 10 nM, 3 nM, and 10 microM for EGF, bradykinin, and histamine, respectively. EGF and bradykinin stimulated the rapid accumulation of the two isomers of InsP3, Ins(1,3,4)P3, and Ins(1,4,5)P3 as determined by high performance liquid chromatography analysis; maximal accumulation of Ins(1,4,5)P3 occurred within 15 s. EGF and bradykinin also stimulated a rapid (maximal levels attained within 30 s after addition of hormone) and a sustained 4- and 6-fold rise, respectively, in cytosolic free Ca2+ levels as measured by Fura-2 fluorescence. EGF and bradykinin also produced a rapid, although transient, 3- and 5-fold increase, respectively, in cytosolic free Ca2+ after chelation of extracellular Ca2+ with 3 mM EGTA. These data are consistent with the idea that EGF elevates intracellular Ca2+ levels in A431 cells, at least in part, as a result of the rapid formation of Ins(1,4,5)P3 and the consequential release of Ca2+ from intracellular stores.
Rapid calcium release from cardiac sarcoplasmic reticulum vesicles is dependent on Ca2+ and is modulated by Mg2+, adenine nucleotide, and calmodulin.
Creators: name: Henderson, J S
name: Meissner, G
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1987

description: A subpopulation of canine cardiac sarcoplasmic reticulum vesicles has been found to contain a "Ca2+ release channel" which mediates the release of intravesicular Ca2+ stores with rates sufficiently rapid to contribute to excitation-contraction coupling in cardiac muscle. 45Ca2+ release behavior of passively and actively loaded vesicles was determined by Millipore filtration and with the use of a rapid quench apparatus using the two Ca2+ channel inhibitors, Mg2+ and ruthenium red. At pH 7.0 and 5-20 microM external Ca2+, cardiac vesicles released half of their 45Ca2+ stores within 20 ms. Ca2+-induced Ca2+ release was inhibited by raising and lowering external Ca2+ concentration, by the addition of Mg2+, and by decreasing the pH. Calmodulin reduced the Ca2+-induced Ca2+ release rate 3-6-fold in a reaction that did not appear to involve a calmodulin-dependent protein kinase. Under various experimental conditions, ATP or the nonhydrolyzable ATP analog, adenosine 5'-(beta, gamma-methylene)triphosphate (AMP-PCP), and caffeine stimulated 45Ca2+ release 2-500-fold. Maximal release rates (t1/2 = 10 ms) were observed in media containing 10 microM Ca2+ and 5 mM AMP-PCP or 10 mM caffeine. An increased external Ca2+ concentration (greater than or equal to 1 mM) was required to optimize the 45Ca2+ efflux rate in the presence of 8 mM Mg2+ and 5 mM AMP-PCP. These results suggest that cardiac sarcoplasmic reticulum contains a ligand-gated Ca2+ channel which is activated by Ca2+, adenine nucleotide, and caffeine, and inhibited by Mg2+, H+, and calmodulin.
Additional file 3: of Tailored axillary surgery with or without axillary lymph node dissection followed by radiotherapy in patients with clinically node-positive breast cancer (TAXIS): study protocol for a multicenter, randomized phase-III trial
Creators: name: Henke, Guido
name: Knauer, Michael
name: Ribi, Karin
name: Hayoz, Stefanie
name: Marie-Aline GĂŠrard
name: Ruhstaller, Thomas
name: Zwahlen, Daniel
name: Muenst, Simone
name: Ackerknecht, Markus
name: Hawle, Hanne
name: Fitzal, Florian
name: Gnant, Michael
name: Zoltan MĂĄtrai
name: Ballardini, Bettina
name: Gyr, Andreas
name: Kurzeder, Christian
name: Weber, Walter
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences

description: QoL questionnaire. (PDF 514 kb)
New indefinite integrals of Heun functions
Creators: name: Batic, Davide
name: Forrest, Omar
name: Nowakowski, Marek
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present a conspicuous number of indefinite integrals involving Heun functions and their products obtained by means of the Lagrangian formulation of a general homogeneous linear ordinary differential equation. As a by-product we also derive new indefinite integrals involving the Gauss hypergeometric function and products of hypergeometric functions with elliptic functions of the first kind. All integrals we obtained cannot be computed using Maple and Mathematica.
description: 8 pages
The Ideal Conductor Limit
Creators: name: Jancovici, B.
name: Tellez, G.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: This paper compares two methods of statistical mechanics used to study a classical Coulomb system S near an ideal conductor C. The first method consists in neglecting the thermal fluctuations in the conductor C and constrains the electric potential to be constant on it. In the second method the conductor C is considered as a conducting Coulomb system the charge correlation length of which goes to zero. It has been noticed in the past, in particular cases, that the two methods yield the same results for the particle densities and correlations in S. It is shown that this is true in general for the quantities which depend only on the degrees of freedom of S, but that some other quantities, especially the electric potential correlations and the stress tensor, are different in the two approaches. In spite of this the two methods give the same electric forces exerted on S.
description: 19 pages, plain TeX. Submited to J. Phys. A: Math. Gen
Pheidole hirtula
Creators: name: Wilson, E. O.
Publisher: name: Harvard University Press
Year: 2003
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole hirtula

description: Pheidole hirtula Forel
Pheidole vaslitii var. hirtula Forel 1899e: 65. Raised to species level by Creighton 1950a: 211. Syn.: Pheidole (Cardiopheidole) vaslitii var. acolhua Wheeler 1914c: 48; synonymy by Creighton 1958: 211.
Types Mus. Hist. Nat. Geneve.
etymology L hirtula, little hairy one.
Diagnosis A large trimorphic species (major, supermajor, minor) placed in the pilifera group because of the 2-toothed hypostoma but with other traits conforming to the fallax group. Very close to obtusospinosa, distinguished most readily in the supermajor, as illustrated, by the rounded foveae of the rear half of the dorsum of the head, with the interspaces smooth and shiny. This form is considered by Ward (1999) to be a likely geographic subspecies of obtusopilosa rather than a full species. Measurements (mm) All from near Chapulco, Puebla. Supermajor: HW 2.60, HL 2.40, SL 1.18, EL 0.32, PW 1.34. Major: HW 1.52, HL 1.60, SL 1.10, EL 0.24, PW0.82. Minor: HW 0.66, HL 0.86, SL 1.04, EL 0.20, PW 0.48.
Color Supermajor, major, and minor: head and appendages light reddish brown to plain medium brown, rest of body medium brown.
Range According to Creighton (1958), who studied hirtula closely, the species occurs between 1070 and 2310 m, with most colonies concentrated at 1500-2100 m, from northern Chihuahua southward through Coahuila, Nuevo Leon, San Luis Potosi and Zacatecas to Hidalgo, Queretaro, and Jalisco. Barry E. Pullen (personal communication) reports the species as common in the suburbs of Mexico City.
Biology Creighton (1958) reports that mature colonies are very large, with numerous majors, and occasionally dominate the immediate surrounding area to the exclusion of other ant species. Winged reproductives are found in the nests from April to at least September, and nuptial flights evidently occur in late August into early September. According to Barry Pullen, the size variation of the workers is continuous, but with sharp modes marking the minor, major, and supermajor castes.
Figure Supermajor, head. MEXICO: km 275, Highway 150 northeast of Chapulco, Puebla.
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 578
Bose Symmetry Interference Effects of $4π$ Final States
Creators: name: Chen, Jie
name: Li, Xue-Qian
name: Zou, Bing-Song
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We carefully analyze the relative branching ratios of $4π$ final states $π^+π^-π^+π^-$, $π^+π^-π^0π^0$ and $π^0π^0π^0π^0$, from various resonances of $J^{PC}=0^{++}$, $0^{-+}$, $2^{++}$. We find that the Bose symmetry interference effects would make their ratios to obviously differ from the naive counting values without considering these effects. The results should be applied to estimate correctly various $4π$ decay branching ratios of relevant resonances.
Additional file 1: of General practitioners’ reasoning on risk screening and primary prevention of stroke – a focus group study
Creators: name: Ann-Helen Patomella
name: Mickols, Gustav
name: Asaba, Eric
name: Nilsson, Gunnar
name: Fridén, Cecilia
name: Kottorp, Anders
name: Bertilson, Bo
name: Tham, Kerstin
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Interview guide: Interview guide for focus group interviews. (DOCX 19 kb)
Recovering the Principle of Relativity from the Cosmic Fabric Model of Space
Creators: name: Tenev, T. G.
name: Horstemeyer, M. F.
Publisher: name: arXiv
Year: 2018
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83D05, 74L99

description: We extend the descriptive power of the Cosmic Fabric model of space developed by Tenev and Horstemeyer (2018) to include moving observers by demonstrating that all reference frames are phenomenologically equivalent with one another and transform between each other via the Lorentz transformations. Our approach is similar to that of Lorentz (1892), which was used to explain the negative outcome of the Michelson-Morley æther detection experiment (Michelson and Morley 1887), except that we deduce the notions of length contraction and time dilation from the postulates of the Cosmic Fabric model. Our result is valid for the continuum length scale at which, by definition, the cosmic fabric can be described mathematically as a continuum. Herein, we also discuss the length-scale dependent nature of the Cosmic Fabric model as a possible way to relate gravitational and quantum theories.
Structure and formation of a stable histidine-based trifunctional cross-link in skin collagen.
Creators: name: London, R E
name: Mechanic, G L
name: Guenat, C
name: Yamauchi, M
name: Hashimoto, F
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1987

description: A stable nonreducible trifunctional cross-linking amino acid has been isolated from mature bovine skin collagen fibrils. Previous cross-link peptide isolations and amino acid analyses indicate the compound has properties identical with those of hydroxyaldolhistidine. Its newly proposed structure was verified using fast atom bombardment mass spectrometry, and 1H and 13C nuclear magnetic resonance. The data indicated that the cross-link consists of the prosthetic groups from one residue each of histidine, hydroxylysine, and lysine. The 1H and 13C nuclear magnetic resonance data indicated that imidazole C-2 of histidine is linked to C-6 of norleucine (epsilon-deaminated lysine residue) which in turn is linked to the C-6 amino group of hydroxylysine. Based on the trivial names for other cross-linking residues found in collagen and elastin it was given the name histidinohydroxylysinonorleucine. In vitro incubation studies for up to 24 weeks, in aqueous solution at physiological pH and ionic strength, using 6-month-old bovine embryo skin demonstrated a one-to-one stoichiometric relationship between the disappearance of the labile reducible bifunctional cross-link dehydrohydroxylysinonorleucine and the appearance of histidinohydroxylsinonorleucine. These results can partially explain the previously observed disappearance of dehydrohydroxylysinonorleucine with chronological age.
pi-pi Scattering and the Meson Resonance Spectrum
Creators: name: Kloet, W. M.
name: Loiseau, B.
Publisher: name: arXiv
Year: 1997
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A pi-pi, Kbar-K, and rho-rho(omega-omega) fully coupled channel model is used to predict the lowest isospin S, P, D, F-wave phase shifts and inelasticities for elastic pi-pi scattering from threshold to 2.0 GeV. As input the S-matrix is required to exhibit poles corresponding to the meson resonance table of the Particle Data Group. As expected, the pi-pi inelasticity is very strongly related to the opening of the Kbar-K channel near 1 GeV, and the opening of rho-rho(4pi) and omega-omega(6pi) channels in the 1.5 GeV region. The predictions of this model are compared to the various elastic pi-pi to pi-pi amplitudes, that were obtained from analyses of pi(-) p to pi(-) pi(+) n data. The role of the various resonances, in particular the glueball candidate f_0(1500) and the f_J(1710) is investigated.