cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MOESM1 of Coreâ€“shell polymeric nanoparticles co-loaded with photosensitizer and organic dye for photodynamic therapy guided by fluorescence imaging in near and short-wave infrared spectral regions
Creators: name: O. Chepurna
name: A. Yakovliev
name: R. Ziniuk
name: O. Nikolaeva
name: S. Levchenko
name: H. Xu
name: M. Losytskyy
name: J. Bricks
name: Yu. Slominskii
name: L. Vretik
name: J. Qu
name: T. Ohulchanskyy
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: Additional file 1: Figure S1. Transmission electron microscopy (TEM) images of NPs_D2 with (a) and without (b) TEM contrast agent (phosphotungstic acid); NPs loaded PS and NIRFD without contrast agent (c). Figure S2. Fluorescence spectra of NF: polySt-poly(NIPAM-co-AA) NPs loaded with HPPH and dyes. a Fluorescence of HPPH emission loaded to NPs_D1 and NPs_D2 (excitation at 400 nm). b Fluorescence of NPs_D2 loaded with HPPH only and with HPPH and different concentration of JB 17-08; c Dependence of fluorescence intensity of JB 17-08 loaded NPs_D1 and NPs_D2 on dye concentration. Fluorescence was excited at 808 nm. Figure S3. Absorption (a) and fluorescence spectra (b, c) of HPPH and JB17-07 loaded to NPs_D2 before (black) and after (red) dialysis. Figure S4. Changes in absorption spectra of HPPH loaded to NPs_D2 under 532 nm laser irradiation. Samples were irradiated for 0,15,30 and 60 min. Figure S5. Confocal microscopy images of HeLa cells pre-incubated with HPPH/NIRFD NF, irradiated with laser at 405 nm and stained with propidium iodide (PI)24 h post irradiation. a Transmission (left and central columns) and PI fluorescence (right column) of cells treated with NPs_D2 loaded with HPPH and JB7-08. b NPs_D2 loaded with HPPH and JB17-08. Irradiated (laser scanned) area is marked by green dashed square.
Generalisations of the Einstein-Straus model to cylindrically symmetric settings
Creators: name: Mena, Filipe C.
name: Tavakol, Reza
name: Vera, Raul
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study generalisations of the Einstein--Straus model in cylindrically symmetric settings by considering the matching of a static space-time to a non-static spatially homogeneous space-time, preserving the symmetry. We find that such models possess severe restrictions, such as constancy of one of the metric coefficients in the non-static part. A consequence of this is that it is impossible to embed static locally cylindrically symmetric objects in reasonable spatially homogeneous cosmologies.
description: LaTeX, 3 pages, submitted to Proceedings of the MGX
title: Lymphendothel in terminaler Herzinsuffizienz und nach Herz- und Lungentransplantation
Creators: name: Dashkevich, Alexey
Publisher: name: Ludwig-Maximilians-Universität München
Year: 2017
Subjects: subject: 600
subject: 610
subject: FOS: Medical and Health Sciences

description: The lymphatic endothelium is relevant for the pathogenesis of various cardiac and pulmonary diseases. However, the knowledge about the functions and role of lymphatic endothelium in the setting of transplantation is very limited. Therefore it was the main focus of this study. The study investigated the changes of lymphatic endothelial phenotype in patients with terminal heart failure and during the time course after heart and lung transplantation. These observations of the lymphatic phenotype are the first of their kind and provide the evidence, that acute allograft rejection after heart and lung transplantation in human patients is associated with significant changes in the phenotype of lymphatic endothelium. To show the exact mechanistic role of lymphatic endothelium in acute organ rejection and to clarify the cause-effect relation between allograft rejection and lymphatic endothelium, the experimental studies involving heterotopic heart transplantation in rat and mouse were conducted. The results demonstrated that ischemiareperfusion injury induced the activation of lymphatic endothelial cells in rat cardiac allografts. The process was mediated by interaction in the VEGF-C-VEGFR-3 axis and had direct consequences for the development of alloimmune responses. Further, specific perioperative single-dose VEGF-C inhibiting strategies demonstrated beneficial effects on lymphatic vessel activation, antigenpresenting cell trafficking and subsequent development of alloimmune responses in rat cardiac allografts. VEGF-C/D trapping in donor heart prevented acute lymphatic vessel activation and led to homing of VEGFR-3+ dendritic cells in cardiac allograft. Intracoronary ex-vivo perfusion with VEGFC/D trap also improved rat cardiac allograft survival and inhibited the development of cardiac fibrosis, allograft vasculopathy and inflammation. The results of the study, thus, demonstrate the significance of VEGF-C-VEGFR-3 signaling in alloimmunity and suggest VEGF-C/D inhibiting strategies as an alternative clinically feasible immunomodulatory approach targeting lymphatic vessels.
Generalized Boolean Functions and Quantum Circuits on IBM-Q
Creators: name: Gangopadhyay, Sugata
name: Poonia, Vishvendra Singh
name: Aggarwal, Daattavya
name: Parekh, Rhea
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We explicitly derive a connection between quantum circuits utilising IBM's quantum gate set and multivariate quadratic polynomials over integers modulo 8. We demonstrate that the action of a quantum circuit over input qubits can be written as generalized Walsh-Hadamard transform. Here, we derive the polynomials corresponding to implementations of the Swap gate and Toffoli gate using IBM-Q gate set.
description: 7 pages, 8 figures, Accepted to Publish in: 10th International Conference on Computing, Communication and Networking Technologies and IEEE Xplore
Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude
Creators: name: Sanuki, T.
name: Fujikawa, M.
name: Matsunaga, H.
name: Abe, K.
name: Anraku, K.
name: Fuke, H.
name: Haino, S.
name: Imori, M.
name: Izumi, K.
name: Maeno, T.
name: Makida, Y.
name: Matsui, N.
name: Matsumoto, H.
name: Nishimura, J.
name: Nozaki, M.
name: Orito, S.
name: Sasaki, M.
name: Shikaze, Y.
name: Suzuki, J.
name: Tanaka, K.
name: Yamamoto, A.
name: Yamamoto, Y.
name: Yamato, K.
name: Yoshida, T.
name: Yoshimura, K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Cosmic-ray proton and antiproton spectra were measured at mountain altitude, 2770 m above sea level. We observed more than 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy range between 0.25 and 3.3 GeV. The zenith-angle dependence of proton flux was obtained. The observed spectra were compared with theoretical predictions.
description: 10 pages, 5 figures, Submitted to Phys. Lett. B
Observations of Abell 4059 with Chandra, HST and VLA: unraveling a complex cluster/radio-galaxy interaction
Creators: name: Choi, Yun Young
name: Reynolds, Christopher S.
name: Heinz, Sebastian
name: Rosenberg, Jessica L.
name: Perlman, Eric S.
name: Yang, Jongmann
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: (abridged) We present a detailed reanalysis of the Chandra data for the galaxy cluster Abell 4059 and its central radio galaxy, PKS2354-35. We also present new 1.4GHz and 4.7GHz CnB-array radio data from the Very Large Array (VLA), as well as a short archival WFPC2 image from the Hubble Space Telescope. The presence of a strong interaction between this radio galaxy and the intracluster medium (ICM) was suggested by Huang & Sarazin (1998) on the basis of a short observation by the High Resolution Imager on ROSAT, and confirmed in our preliminary analysis of the Chandra/ACIS-S data. In particular, X-ray imaging clearly shows two cavities within the ICM that are approximately aligned with the radio-galaxy axis. However, using our new radio maps we fail to find a detailed correspondence between the 1 arcmin scale radio-lobes and the ICM cavities. This suggests that the cavities are ``ghosts'' of a previous burst of powerful activity by PKS 2354-35. We also examine the nature of the central asymmetric ridge (or bar) of X-ray emission extending for 30kpc south-west of the cluster center that has been noted in these previous analyzes. We find the ridge to be denser and cooler than, but probably in pressure balance with, its surroundings. The thermal evolution of this structure seems to be dominated by radiative cooling, possibly enhanced by the radio-galaxy ICM interaction. We discuss several possible models for the formation of this SW ridge and find none of them to be entirely satisfactory.
description: 13 pages, accepted for publication in Astrophysical Journal. A version of the manuscript including full resolution figures can be found at http://www.astro.umd.edu/~chris/publications/papers/a4059_detailed.ps
CP violation at a linear collider with transverse polarization
Creators: name: Ananthanarayan, B.
name: Rindani, Saurabh D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show how transverse beam polarization at $e^+e^-$ colliders can provide a novel means to search for CP violation by observing the distribution of a single final-state particle without measuring its spin. We suggest an azimuthal asymmetry which singles out interference terms between standard model contribution and new-physics scalar or tensor effective interactions in the limit in which the electron mass is neglected. Such terms are inaccessible with unpolarized or longitudinally polarized beams. The asymmetry is sensitive to CP violation when the transverse polarizations of the electron and positron are in opposite senses. The sensitivity of planned future linear colliders to new-physics CP violation in $e^+e^- \to t \bar{t}$ is estimated in a model-independent parametrization. It would be possible to put a bound of $\sim 7$ TeV on the new-physics scale $Λ$ at the 90% C.L. for $\sqrt{s}=500$ GeV and $\int dt {\cal L}=500 {\rm fb}^{-1}$, with transverse polarizations of 80% and 60% for the electron and positron beams, respectively.
description: 15 pages, latex, includes 5 figures. This version (v3) corresponds to publication in Physical Review; extended version of v2 which corresponded to LC note LC-TH-2003-099 with corrected figure captions
Rogeria besucheti Kugler 1994
Creators: name: DE ALBUQUERQUE, EMÍLIA ZOPPAS
name: PRADO, LÍVIA PIRES DO
name: ANDRADE-SILVA, JOUDELLYS
name: DE SIQUEIRA, EMELY LAIARA SILVA
name: DA SILVA SAMPAIO, KELLY LIANE
name: ALVES, DIEGO
name: BRANDÃO, CARLOS ROBERTO FERREIRA
name: ANDRADE, PALOMA L.
name: FEITOSA, RODRIGO MACHADO
name: DE AZEVEDO KOCH, ELMO BORGES
name: DELABIE, JACQUES HUBERT CHARLES
name: FERNANDES, ITANNA
name: BACCARO, FABRÍCIO BEGGIATO
name: SOUZA, JORGE LUIZ PEREIRA
name: ALMEIDA, RONY PETERSON SANTOS
name: SILVA, ROGÉRIO R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Rogeria
Rogeria besucheti

description: Rogeria besucheti Kugler, 1994 *. Marituba [CPDC].
 Rogeria blanda (Smith, 1858). Municipality unavailable [Kempf, 1972c]; Belém [MZSP; Kugler, 1994]; Capanema [MZSP]; Jacareacanga [MZSP; Kugler, 1994]; Parauapebas [ANTWEB].
description: Published as part of DE ALBUQUERQUE, EMÍLIA ZOPPAS, PRADO, LÍVIA PIRES DO, ANDRADE-SILVA, JOUDELLYS, DE SIQUEIRA, EMELY LAIARA SILVA, DA SILVA SAMPAIO, KELLY LIANE, ALVES, DIEGO, BRANDÃO, CARLOS ROBERTO FERREIRA, ANDRADE, PALOMA L., FEITOSA, RODRIGO MACHADO, DE AZEVEDO KOCH, ELMO BORGES, DELABIE, JACQUES HUBERT CHARLES, FERNANDES, ITANNA, BACCARO, FABRÍCIO BEGGIATO, SOUZA, JORGE LUIZ PEREIRA, ALMEIDA, RONY PETERSON SANTOS & SILVA, ROGÉRIO R., 2021, Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin, pp. 1-83 in Zootaxa 5001 (1) on page 52, DOI: 10.11646/zootaxa.5001.1.1, http://zenodo.org/record/5122523
MOESM1 of Communication skills training for physicians improves health literacy and medical outcomes among patients with hypertension: a randomized controlled trial
Creators: name: Seyedeh Belin Tavakoly Sany
name: Behzhad, Fatemeh
name: Ferns, Gordon
name: Nooshin Peyman
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1 : Table S1. Translation process according to international guidelines for cross-cultural adaptation (CCA) in this study. Table S2. Results of linear regression testing the effects of health literacy on health outcomes and demographic characteristic
OpenAIRE_Service_Factsheet_Graph_V3
Creators: name: Manghi, Paolo
name: Vergoulis, Thanasis
name: Atzori, Claudio
name: Baglioni, Miriam
name: Bardi, Alessia
name: Moura, Paula Cristina Marinho
Publisher: name: Zenodo
Year: 2024

description: This factsheet represents the OpenAIRE Graph, a scholarly knowledge graph resulting from the aggregation of metadata records from over 70k data sources which are then further enriched. Funders, organizations, researchers, research communities and publishers can freely use the OpenAIRE Graph to monitor, discover, and navigate the open science record as a whole.
An informal introduction to multiplier ideals
Creators: name: Blickle, Manuel
name: Lazarsfeld, Robert
Publisher: name: arXiv
Year: 2003
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 14-01; 14B05

description: Multiplier ideals, and the vanishing theorems they satisfy, have found many applications in recent years. In the global setting they have been used to study pluricanonical and other linear series on a projective variety. More recently, they have led to the discovery of some surprising uniform results in local algebra. The present notes aim to provide a gentle introduction to the algebraically-oriented local side of the theory. They follow closely a short course on multiplier ideals given in September 2002 at the Introductory Workshop of the program in commutative algebra at MSRI.
description: 28 pages, 5 figures, minor corrections and improvements according to editors suggestions
Rhabdochonidae Travassos, Artigas & Pereira 1928
Creators: name: Arai, Hisao P.
name: Smith, John W.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Chromadorea
Spirurida
Rhabdochonidae

description: Family RHABDOCHONIDAE Travassos, Artigas & Pereira, 1928
The Family Rhabdochonidae is represented in Canadian fishes by only one genus, namely, Rhabdochona. The phylogeny and biogeography of species of Rhabdochona from Canada and elsewhere in the Americas were investigated by Mejía-Madrid et al. (2007).
description: Published as part of Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, pp. 1-274 in Zootaxa 4185 (1) on page 66, DOI: 10.11646/zootaxa.4185.1.1, http://zenodo.org/record/165530
Pheidole peltastes Wilson 2003
Creators: name: DE ALBUQUERQUE, EMÍLIA ZOPPAS
name: PRADO, LÍVIA PIRES DO
name: ANDRADE-SILVA, JOUDELLYS
name: DE SIQUEIRA, EMELY LAIARA SILVA
name: DA SILVA SAMPAIO, KELLY LIANE
name: ALVES, DIEGO
name: BRANDÃO, CARLOS ROBERTO FERREIRA
name: ANDRADE, PALOMA L.
name: FEITOSA, RODRIGO MACHADO
name: DE AZEVEDO KOCH, ELMO BORGES
name: DELABIE, JACQUES HUBERT CHARLES
name: FERNANDES, ITANNA
name: BACCARO, FABRÍCIO BEGGIATO
name: SOUZA, JORGE LUIZ PEREIRA
name: ALMEIDA, RONY PETERSON SANTOS
name: SILVA, ROGÉRIO R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole peltastes

description: Pheidole peltastes Wilson, 2003. Belém [ANTWEB; MCZC; Wilson, 2003]; Portel [Harada, 2016].
 Pheidole perpusilla Emery, 1894. Municipality unavailable [ANTWEB; Emery, 1894b; Kempf, 1972b; Kempf, 1972c; Brandão, 1991; Longino, 2009]; Belém [MPEG; MZSP].
 Pheidole puttemansi Forel, 1911. Almeirim [DZUP]; Juruti [DZUP]; Marituba [CPDC]; Óbidos [INPA]; Prainha [DZUP]; Santarém [DZUP]; Terra Santa [Santos et al., 2008].
 Pheidole radoszkowskii Mayr, 1884. Belém [MPEG]; Marabá [DZUP]; Marituba [CPDC]; Oriximiná [CPDC]; Terra Santa [Santos et al., 2008].
description: Published as part of DE ALBUQUERQUE, EMÍLIA ZOPPAS, PRADO, LÍVIA PIRES DO, ANDRADE-SILVA, JOUDELLYS, DE SIQUEIRA, EMELY LAIARA SILVA, DA SILVA SAMPAIO, KELLY LIANE, ALVES, DIEGO, BRANDÃO, CARLOS ROBERTO FERREIRA, ANDRADE, PALOMA L., FEITOSA, RODRIGO MACHADO, DE AZEVEDO KOCH, ELMO BORGES, DELABIE, JACQUES HUBERT CHARLES, FERNANDES, ITANNA, BACCARO, FABRÍCIO BEGGIATO, SOUZA, JORGE LUIZ PEREIRA, ALMEIDA, RONY PETERSON SANTOS & SILVA, ROGÉRIO R., 2021, Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin, pp. 1-83 in Zootaxa 5001 (1) on page 51, DOI: 10.11646/zootaxa.5001.1.1, http://zenodo.org/record/5122523
Megalomyrmex balzani Emery 1894
Creators: name: DE ALBUQUERQUE, EMÍLIA ZOPPAS
name: PRADO, LÍVIA PIRES DO
name: ANDRADE-SILVA, JOUDELLYS
name: DE SIQUEIRA, EMELY LAIARA SILVA
name: DA SILVA SAMPAIO, KELLY LIANE
name: ALVES, DIEGO
name: BRANDÃO, CARLOS ROBERTO FERREIRA
name: ANDRADE, PALOMA L.
name: FEITOSA, RODRIGO MACHADO
name: DE AZEVEDO KOCH, ELMO BORGES
name: DELABIE, JACQUES HUBERT CHARLES
name: FERNANDES, ITANNA
name: BACCARO, FABRÍCIO BEGGIATO
name: SOUZA, JORGE LUIZ PEREIRA
name: ALMEIDA, RONY PETERSON SANTOS
name: SILVA, ROGÉRIO R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Megalomyrmex
Megalomyrmex balzani

description: Megalomyrmex balzani Emery, 1894. Oriximiná [INPA]; Terra Santa [Santos et al., 2008].
 Megalomyrmex cuatiara Brandão, 1990 *. Almeirim [MPEG]; Conceição do Araguaia [MPEG]; Itaituba [MPEG]; Marabá [DZUP]; Marituba [CPDC]; Melgaço [MPEG]; Primavera [MPEG].
 Megalomyrmex drifti Kempf, 1961. Curionópolis [MPEG]; Parauapebas [MZSP]; Santarém [INPA; Vasconcelos et al., 2006].
description: Published as part of DE ALBUQUERQUE, EMÍLIA ZOPPAS, PRADO, LÍVIA PIRES DO, ANDRADE-SILVA, JOUDELLYS, DE SIQUEIRA, EMELY LAIARA SILVA, DA SILVA SAMPAIO, KELLY LIANE, ALVES, DIEGO, BRANDÃO, CARLOS ROBERTO FERREIRA, ANDRADE, PALOMA L., FEITOSA, RODRIGO MACHADO, DE AZEVEDO KOCH, ELMO BORGES, DELABIE, JACQUES HUBERT CHARLES, FERNANDES, ITANNA, BACCARO, FABRÍCIO BEGGIATO, SOUZA, JORGE LUIZ PEREIRA, ALMEIDA, RONY PETERSON SANTOS & SILVA, ROGÉRIO R., 2021, Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin, pp. 1-83 in Zootaxa 5001 (1) on page 45, DOI: 10.11646/zootaxa.5001.1.1, http://zenodo.org/record/5122523
MOESM3 of Computer vision and machine learning enabled soybean root phenotyping pipeline
Creators: name: Falk, Kevin
name: Talukder Z. Jubery
name: Mirnezami, Seyed V.
name: Parmley, Kyle
name: Soumik Sarkar
name: Singh, Arti
name: Baskar Ganapathysubramanian
name: Asheesh Singh
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Plant Biology

description: Additional file 3: Table S1. A list of imaging system components. Table S2. Validation correlations between 23 RSA traits extracted from ARIA 2.0 using 298 heuristically segmented and CAE segmented root images. Table S3. RSA traits at 6d, 9d and 12d when grouped into country of origin, growth habit type and diversity of genetic background. Table S4. Descriptive statistics for 6 root and shoot traits of 115 maturity group II genotypes of soybean at 6d, 9d and 12d, obtained from BLUP values for each genotype using heuristically segmented images. Table S5. Validation correlation between GiARoot software and ARIA 2.0. Table S6. Minimal root angle diversity among the three genotypes. A Kolmogorov-Smirnov test was used to detect p-value statistical differences in directionality on root branching angle at each of the three time points. Table S7. Correlations between plant dry weight taken at 12d and root traits at 9d for 115 maturity group II genotypes of soybean.
High-resolution resonance-enhanced multiphoton photoelectron circular dichroism
Creators: name: Kastner, Alexander
name: Koumarianou, Greta
name: Glodic, Pavle
name: Samartzis, Peter C.
name: Ladda, Nicolas
name: Ranecky, Simon T.
name: Ring, Tom
name: Sudheendran, Vasudevan
name: Witte, Constantin
name: Braun, Hendrike
name: Lee, Han-Gyeol
name: Senftleben, Arne
name: Berger, Robert
name: Park, G. Barratt
name: Schäfer, Tim
name: Baumert, Thomas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Photoelectron circular dichroism (PECD) is a highly sensitive enantiospecific spectroscopy for studying chiral molecules in the gas phase using either single-photon ionization or multiphoton ionization. In the short pulse limit investigated with femtosecond lasers, resonance-enhanced multiphoton ionization (REMPI) is rather instantaneous and typically occurs simultaneously via more than one vibrational or electronic intermediate state due to limited frequency resolution. In contrast, vibrational resolution in the REMPI spectrum can be achieved using nanosecond lasers. In this work, we follow the high-resolution approach using a tunable narrow-band nanosecond laser to measure REMPI-PECD through distinct vibrational levels in the intermediate 3s and 3p Rydberg states of fenchone. We observe the PECD to be essentially independent of the vibrational level. This behaviour of the chiral sensitivity may pave the way for enantiomer specific molecular identification in multi-component mixtures: one can specifically excite a sharp, vibrationally resolved transition of a distinct molecule to distinguish different chiral species in mixtures.
Hu et al. Supplemental Tables.docx
Creators: name: Hu, Mimi I.
name: Waguespack, Steven G.
name: Dosiou, Chrysoula
name: Ladenson, Paul W.
name: Livhits, Masha
name: Wirth, Lori J.
name: Sadow, Peter M.
name: Krane, Jeffrey F.
name: Stack, Brendan C.
name: Zafereo, Mark E.
name: Ali, Syed Z.
name: Weitzman, Steven P.
name: Yangyang Hao
name: Babiarz, Joshua E.
name: Kennedy, Giulia C.
name: Kloos, Richard
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: 60408 Genomics
subject: FOS: Biological sciences

description: Supplemental Tables
Beyond Superconductivity
Creators: name: Mannhart, Jochen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a novel device concept that utilizes the fascinating transition regime between quantum mechanics and classical physics. The devices operate by using a small number of individual quantum mechanical collapse events to interrupt the unitary evolution of quantum states represented by wave packets. Exceeding the constraints of the unitary evolution of quantum mechanics given by the Schroedinger equation and of classical Hamiltonian physics, these devices display a surprising behavior.
description: Dedicated to Ted Geballe on the occasion of his 100th birthday
A Metric Inequality for the Thompson and Hilbert Geometries
Creators: name: Walsh, Cormac
name: Nussbaum, Roger D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53C60

description: There are two natural metrics defined on an arbitrary convex cone: Thompson's part metric and Hilbert's projective metric. For both, we establish an inequality giving information about how far the metric is from being non-positively curved.
description: 15 pages, 0 figures. To appear in J. Inequalities Pure Appl. Math
Coarse-grained Models of Aqueous Solutions of Polyelectrolytes: Significance of Explicit Charges
Creators: name: Bacle, Pauline
name: Jardat, Marie
name: Marry, Virginie
name: Mériguet, Guillaume
name: Batôt, Guillaume
name: Dahirel, Vincent
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The structure of polyelectrolytes is highly sensitive to small changes in the interactions between its monomers. In particular, interactions mediated by counterions play a significant role, and are affected by both specific molecular effects and generic concentration effects. The ability of coarse-grained models to reproduce the structural properties of an atomic model is thus a challenging task. Our present study compares the ability of different kinds of coarse-grained models: (i)~to reproduce the structure of an atomistic model of a polyelectrolyte (the sodium polyacrylate), (ii)~to reproduce the variations of this structure with the number of monomers and with the concentration of the different species. We show that the adequate scalings of the gyration radius of the polymer~$R_{\rm g}$ with the number of monomers~$N$ and with the box size~$L_{\rm box}$ are only obtained, first, if the monomer charges and the counterions are explicitely described, and second, if an attractive Lennard-Jones contribution is added to the interaction between distant monomers. Also, we show that implicit ion models are relevant only to the high electrostatic screening regime.
Nesomyrmex pleuriticus
Creators: name: DE ALBUQUERQUE, EMÍLIA ZOPPAS
name: PRADO, LÍVIA PIRES DO
name: ANDRADE-SILVA, JOUDELLYS
name: DE SIQUEIRA, EMELY LAIARA SILVA
name: DA SILVA SAMPAIO, KELLY LIANE
name: ALVES, DIEGO
name: BRANDÃO, CARLOS ROBERTO FERREIRA
name: ANDRADE, PALOMA L.
name: FEITOSA, RODRIGO MACHADO
name: DE AZEVEDO KOCH, ELMO BORGES
name: DELABIE, JACQUES HUBERT CHARLES
name: FERNANDES, ITANNA
name: BACCARO, FABRÍCIO BEGGIATO
name: SOUZA, JORGE LUIZ PEREIRA
name: ALMEIDA, RONY PETERSON SANTOS
name: SILVA, ROGÉRIO R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Nesomyrmex
Nesomyrmex pleuriticus

description: Nesomyrmex pleuriticus (Kempf, 1959) *. Belém [MZSP].
 Nesomyrmex spininodis (Mayr, 1887). Municipality unavailable [Kempf, 1972c]; Belém [Kempf, 1959b]; Paragominas [ANTWEB; Solar et al., 2016b]; Parauapebas [MPEG].
description: Published as part of DE ALBUQUERQUE, EMÍLIA ZOPPAS, PRADO, LÍVIA PIRES DO, ANDRADE-SILVA, JOUDELLYS, DE SIQUEIRA, EMELY LAIARA SILVA, DA SILVA SAMPAIO, KELLY LIANE, ALVES, DIEGO, BRANDÃO, CARLOS ROBERTO FERREIRA, ANDRADE, PALOMA L., FEITOSA, RODRIGO MACHADO, DE AZEVEDO KOCH, ELMO BORGES, DELABIE, JACQUES HUBERT CHARLES, FERNANDES, ITANNA, BACCARO, FABRÍCIO BEGGIATO, SOUZA, JORGE LUIZ PEREIRA, ALMEIDA, RONY PETERSON SANTOS & SILVA, ROGÉRIO R., 2021, Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin, pp. 1-83 in Zootaxa 5001 (1) on page 47, DOI: 10.11646/zootaxa.5001.1.1, http://zenodo.org/record/5122523
Price dispersion in thin farmland markets: What is the role of asymmetric information?
Creators: name: Kahle, Christoph
name: Seifert, Stefan
name: Hüttel, Silke
name: Kahle, Christoph
name: Seifert, Stefan
name: Hüttel, Silke
Publisher: name: Unknown
Year: 2019
Subjects: subject: Land Economics/Use
subject: thin farmland markets
subject: hedonic price
subject: two-tier model

description: This paper investigates the role of information and search cost in the price formation in farmland markets. Using a comprehensive data set with more than 10,000 transactions between 2014–2017 in one of the eastern German Federal States, we estimate a two-tier model to capture price effects induced by asymmetrically distributed search cost between buyers and sellers. By relating these costs to the degree of professionalism, we can identify relative price effects and institutional sellers to sell at the lowest cost of being information deficient. No price differences can be indentified by contrasting farmers and non-farmers.
MOESM1 of Review on carbon storage estimation of forest ecosystem and applications in China
Creators: name: Wanlong Sun
name: Xuehua Liu
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Inorganic Chemistry

description: Additional file 1: Table S1. Carbon density and storage of forest ecosystem in the scale of whole China, which obtained from published researches from 1980s to now. Table S2.
Shells of dust around AGB stars: effects on the integrated spectrum of Single Stellar Populations
Creators: name: Piovan, Lorenzo
name: Tantalo, Rosaria
name: Chiosi, Cesare
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we present models for SSPs of intermediate and old ages where dust enshrouded AGB stars are introduced. To this aim, particular care is devoted to follow the evolution of the AGB stars throughout the quiet and thermally pulsing regimes, to evaluate the effect of self contamination in the outermost layers by the third dredge-up mechanism, to follow the transition from oxygen-rich to carbon-rich objects, and finally to estimate the efficiency of mass-loss by stellar winds. In addition to this, accurate physical models of the dusty shells are presented in which the re-processing of radiation from the central stars is calculated. The resulting spectral energy distribution (SED) is examined to show how important features evolve with time. The SEDs are then convolved with the IRAS filters to obtain the flux in various pass-bands for individual AGB stars of different, mass, chemical composition, and age. The comparison is made by means of SSPs along which AGB stars of the same age but different initial masses are located. The theoretical results are compared to the observational data for selected groups of stars. The same is made for the J,H,K,L pass-bands of the Johnson system. Finally, from the integrated SEDs of the SSPs, we derive the integrated Johnson J,H,K,L magnitudes and colors to be compared to infrared data for star clusters of the Magellanic Clouds.
description: 23 pages, 22 figures, accepted by A&A
Rhabdochona Railliet 1916
Creators: name: Arai, Hisao P.
name: Smith, John W.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Secernentea
Spirurida
Thelaziidae
Rhabdochona

description: Rhabdochona Railliet, 1916
Generic diagnosis (after Moravec 2013). Rhabdochonidae. Medium sized nematodes. Pseudolabia rudimentary. Vestibule dilated to form well-defined funnel- or barrel-shaped prostom supported by longitudinal thickenings projecting anteriorly as teeth, variable in number. Deirids simple or bifurcate. Lateral alae present or absent. Oesophagus divided into anterior muscular portion and posterior glandular portion.
Males: many pre-cloacal and five to seven post-cloacal pairs of papillae; no caudal alae; spicules unequal and dissimilar; gubernaculum absent; tail conical, its tip rounded or with sharp point, rarely with several minute digital processes.
Females: amphidelphic; vulva about mid-body, tail tip rounded or with sharp point, sometimes with many spines, spikes or small mucronate points; eggs elliptical, embryonated, their shells smooth, filamented or with swellings (“formations”). Parasitic in intestine of fresh-water fishes.
description: Published as part of Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, pp. 1-274 in Zootaxa 4185 (1) on page 66, DOI: 10.11646/zootaxa.4185.1.1, http://zenodo.org/record/165530
Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks
Creators: name: Cohen, Thomas D.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A model recently introduced by Jaffe and Wilczek based on the quarks being dynamically bound into diquarks has been used to predict that the recently observed exotic baryons (pentaquarks) fall into a nearly ideally mixed combination of an octer and anti-decuplet representations of SU(3) flavor. The model predicts two states with nucleon quantum numbers which have tentatively been identified with the N*(1440) and the N*(1710). This paper examines the viability of this model by focusing on the decay width of the nucleon members of the multiplet. An inequality relating the partial widths of these nucleon states in the N+nucleon channel to the width of the theta+ is derived for this model under the assuming ideal mixing and that the only significant exact SU(3) symmetry violations are the result of ideal mixing, threshold effects and the masses of pseudo-Goldstone bosons. This inequality is badly violated if the states in the multiplet are the N*(1440) and the N*(1710) and if the recent bounds extracted for the theta+ width are reliable. Thus, the model appears to require a scenario with the existence of at least one presently unknown resonance with nucleon quantum numbers.
description: 8 pages
The ambiguous transient ASASSN-17hx. A possible nova-impostor
Creators: name: Mason, Elena
name: Shore, Steven N.
name: Kuin, Paul
name: Bohlsen, Terry
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Some transients, although classified as novae based on their maximum and early decline optical spectra, cast doubts on their true nature and whether nova impostors might exist. We monitored a candidate nova which displayed a distinctly unusual light curve at maximum and early decline through optical spectroscopy (3000-10000 Å, 500
description: accepted for publication on A&A
Additional file 1 of The degree of equity and coupling coordination of staff in primary medical and health care institutions in China 2013–2019
Creators: name: Ren, Weicun
name: Tarimo, Clifford Silver
name: Sun, Lei
name: Mu, Zihan
name: Ma, Qian
name: Wu, Jian
name: Miao, Yudong
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology

description: Additional file 1:.
The single degenerate channel for the progenitors of type Ia supernovae
Creators: name: Han, Zhanwen
name: Podsiadlowski, Philipp
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have carried out a detailed study of one of the most popular evolutionary channels for the production of Type Ia supernova (SN Ia) progenitors, the semi-degenerate channel (CO+MS), where a carbon/oxygen (CO) white dwarf (WD) accretes matter from an unevolved or slightly evolved non-degenerate star until it reaches the Chandrasekhar mass limit. Employing Eggleton's stellar evolution code and adopting the prescription of Hachisu et al. (1999) for the accretion efficiency, we have carried out full binary evolution calculations for about 2300 close WD binary systems and mapped out the initial parameters in the orbital period -- secondary mass ($P$--$M_2$) plane (for a range of WD masses) which lead to a successful Type Ia supernova. We obtained accurate, analytical fitting formulae to describe this parameter range which can be used for binary population synthesis (BPS) studies. The contours in the $P$--$M_2$ plane differ from those obtained by Hachisu et al. (1999) for low-mass CO WDs, which are more common than massive CO WDs. We show that white dwarfs with a mass as low as $0.67M_\odot$ can accrete efficiently and reach the Chandrasekhar limit. We have implemented these results in a BPS study to obtain the birthrates for SNe Ia and the evolution of birthrates with time of SNe Ia for both a constant star formation rate and a single star burst. The birthrates are somewhat lower than (but comparable to) those inferred observationally.
description: 10 pages, 14 figures, submitted to MNRAS
Real space finite difference method for conductance calculations
Creators: name: Khomyakov, Petr A.
name: Brocks, Geert
Publisher: name: arXiv
Year: 2004
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a general method for calculating coherent electronic transport in quantum wires and tunnel junctions. It is based upon a real space high order finite difference representation of the single particle Hamiltonian and wave functions. Landauer's formula is used to express the conductance as a scattering problem. Dividing space into a scattering region and left and right ideal electrode regions, this problem is solved by wave function matching (WFM) in the boundary zones connecting these regions. The method is tested on a model tunnel junction and applied to sodium atomic wires. In particular, we show that using a high order finite difference approximation of the kinetic energy operator leads to a high accuracy at moderate computational costs.
description: 13 pages, 10 figures
MOVES III. Simultaneous X-ray and ultraviolet observations unveiling the variable environment of the hot Jupiter HD 189733b
Creators: name: Bourrier, V.
name: Wheatley, P. J.
name: Etangs, A. Lecavelier des
name: King, G.
name: Louden, T.
name: Ehrenreich, D.
name: Fares, R.
name: Helling, Ch.
name: Llama, J.
name: Jardine, M. M.
name: Vidotto, A. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this third paper of the MOVES (Multiwavelength Observations of an eVaporating Exoplanet and its Star) programme, we combine Hubble Space Telescope far-ultraviolet observations with XMM-Newton/Swift X-ray observations to measure the emission of HD 189733 in various FUV lines, and its soft X-ray spectrum. Based on these measurements we characterise the interstellar medium toward HD 189733 and derive semi-synthetic XUV spectra of the star, which are used to study the evolution of its high-energy emission at five different epochs. Two flares from HD 189733 are observed, but we propose that the long-term variations in its spectral energy distribution have the most important consequences for the environment of HD 189733b. Reduced coronal and wind activity could favour the formation of a dense population of Si$^{2+}$ atoms in a bow-shock ahead of the planet, responsible for pre- and in-transit absorption measured in the first two epochs. In-transit absorption signatures are detected in the Lyman-$α$ line in the second, third and fifth epochs, which could arise from the extended planetary thermosphere and a tail of stellar wind protons neutralised via charge-exchange with the planetary exosphere. We propose that increases in the X-ray irradiation of the planet, and decreases in its EUV irradiation causing lower photoionisation rates of neutral hydrogen, favour the detection of these signatures by sustaining larger densities of H$^{0}$ atoms in the upper atmosphere and boosting charge-exchanges with the stellar wind. Deeper and broader absorption signatures in the last epoch suggest that the planet entered a different evaporation regime, providing clues as to the link between stellar activity and the structure of the planetary environment.
description: 22 pages, 21 figures, accepted for publication in MNRAS on 23 January 2020
Fayet-Iliopoulos Terms in Supergravity and Cosmology
Creators: name: Binetruy, Pierre
name: Dvali, Gia
name: Kallosh, Renata
name: Van Proeyen, Antoine
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We clarify the structure of N=1 supergravity in 1+3 dimensions with constant FI terms. The FI terms induce non-vanishing R-charges for the fermions and the superpotential. Therefore the D-term inflation model in supergravity with constant FI terms has to be revisited. We also investigate the case of the so-called anomalous U(1) when a chiral superfield is shifted under U(1). In such a case, in the context of string theory, the FI terms originate from the derivative of the Kaehler potential and they are inevitably field-dependent. This raises an issue of stabilization of the relevant field in applications to cosmology. The recently suggested equivalence between the D-term strings and D-branes of type II theory shows that brane-anti-brane systems produce FI terms in the effective 4d theory, with the Ramond-Ramond axion shifting under the U(1) symmetry. This connection gives the possibility to interpret many unknown properties of D-\bar{D} systems in the more familiar language of 4d supergravity D-terms, and vice versa. For instance, the shift of the axion field in both cases restricts the possible forms of the moduli-stabilizing superpotential. We provide some additional consistency checks of the correspondence of D-term-strings to D-branes and show that instabilities of the two are closely related. Surviving cosmic D-strings of type II theory may be potentially observed in the form of D-term strings of 4d supergravity.
description: 42 pages
Pheidole alexeter Wilson 2003
Creators: name: DE ALBUQUERQUE, EMÍLIA ZOPPAS
name: PRADO, LÍVIA PIRES DO
name: ANDRADE-SILVA, JOUDELLYS
name: DE SIQUEIRA, EMELY LAIARA SILVA
name: DA SILVA SAMPAIO, KELLY LIANE
name: ALVES, DIEGO
name: BRANDÃO, CARLOS ROBERTO FERREIRA
name: ANDRADE, PALOMA L.
name: FEITOSA, RODRIGO MACHADO
name: DE AZEVEDO KOCH, ELMO BORGES
name: DELABIE, JACQUES HUBERT CHARLES
name: FERNANDES, ITANNA
name: BACCARO, FABRÍCIO BEGGIATO
name: SOUZA, JORGE LUIZ PEREIRA
name: ALMEIDA, RONY PETERSON SANTOS
name: SILVA, ROGÉRIO R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Pheidole
Pheidole alexeter

description: Pheidole alexeter Wilson, 2003. Municipality unavailable [MCZC]; Vigia [Wilson, 2003].
 Pheidole allarmata Wilson, 2003. Municipality unavailable [ANTWEB]; Belém [MCZC]; Marituba [Wilson, 2003].
description: Published as part of DE ALBUQUERQUE, EMÍLIA ZOPPAS, PRADO, LÍVIA PIRES DO, ANDRADE-SILVA, JOUDELLYS, DE SIQUEIRA, EMELY LAIARA SILVA, DA SILVA SAMPAIO, KELLY LIANE, ALVES, DIEGO, BRANDÃO, CARLOS ROBERTO FERREIRA, ANDRADE, PALOMA L., FEITOSA, RODRIGO MACHADO, DE AZEVEDO KOCH, ELMO BORGES, DELABIE, JACQUES HUBERT CHARLES, FERNANDES, ITANNA, BACCARO, FABRÍCIO BEGGIATO, SOUZA, JORGE LUIZ PEREIRA, ALMEIDA, RONY PETERSON SANTOS & SILVA, ROGÉRIO R., 2021, Ants of the State of Pará, Brazil: a historical and comprehensive dataset of a key biodiversity hotspot in the Amazon Basin, pp. 1-83 in Zootaxa 5001 (1) on page 49, DOI: 10.11646/zootaxa.5001.1.1, http://zenodo.org/record/5122523
ARRULLOS: AN AUTOETHNOGRAPHIC JOURNEY THROUGH MY ABUELA'S PEDAGOGY
Creators: name: Reyes-Puente, Daniela
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 390199
subject: Curriculum and pedagogy not elsewhere classified

description: In the journey ahead, I explore the profound impact of intergenerational relationships, particularly the shared experiences between grandmothers and granddaughters, through a lens of narrative inquiry (Clandinin & Connelly, 2000). Anchored in la convivencia cotidiana with my abuela, I reflect on her role as my first great teacher and the ways her radical love, sabiduría, and conocimiento have shaped my understanding of education.Experiencing my first engagement with narrative inquiry through autoethnography (Phillion, 2002b), I weave personal memories with theory to highlight the transformative potential of love in fostering nurturing educational spaces. Drawing on the work of hooks (2000), I emphasize how care, recognition, cariño, respect, commitment, and trust are central to my abuela’s pedagogy of love.Inspired by my abuela’s teachings and lived experiences, I argue that grandmothers embody a profound ethic of love, care and wisdom that can inform and transform educational practices, particularly in resisting oppressive systems. This work invites educators to embrace the everyday learning rooted in familial and cultural traditions, reimagining classrooms as spaces of love, resilience, and collective growth.My thesis not only honors the knowledge and wisdom of my abuela but also positions it as a powerful framework for addressing current educational inequities. Through this reflection, I illustrate how the personal, when critically examined, becomes a site for dreaming of collective healing and advancing social justice.
FeII/MgII Emission Line Ratio in High Redshift Quasars
Creators: name: Dietrich, M.
name: Hamann, F.
name: Appenzeller, I.
name: Vestergaard, M.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of the analysis of near infrared spectroscopic observations of 6 high-redshift quasars (z > 4), emphasizing the measurement of the ultraviolet FeII/MgII emission line strength in order to estimate the beginning of intense star formation in the early universe. To investigate the evolution of the FeII/MgII ratio over a wider range in cosmic time, we measured this ratio for composite quasar spectra which cover a redshift range of 0 < z < 5 with nearly constant luminosity, as well as for those which span ~6 orders of magnitude in luminosity. A detailed comparison of the high-redshift quasar spectra with those of low-redshift quasars with comparable luminosity shows essentially the same FeII/MgII emission ratios and very similar continuum and line spectral properties, i.e. a lack of evolution of the relative iron to magnesium abundance of the gas in bright quasars since z=5. Current nucleosynthesis and stellar evolution models predict that alpha-elements like magnesium are produced in massive stars ending in type II SNe, while iron is formed predominantly in SNe of type Ia with intermediate mass progenitors. This results in an iron enrichment delay of 0.2 to 0.6 Gyr. We conclude that intense star formation activity in the host galaxies of z>4 quasars must have started already at an epoch corresponding to z_f = 6 to 9, when the age of the universe was ~0.5 Gyr (H_o = 72 km/s/Mpc, Omega_M = 0.3, Omega_Lambda = 0.7). This epoch corresponds well to the re-ionization era of the universe.
description: 22 pages, 5 figures, accepted for publication in ApJ (vol.596, Oct03)