7,661 research outputs found
W. K. C. Guthrie, Les Grecs et leurs dieux. Traduit de l'anglais par S. M. Guillemin
No full textNilsson Martin Persson. W. K. C. Guthrie, Les Grecs et leurs dieux. Traduit de l'anglais par S. M. Guillemin. In: L'antiquité classique, Tome 25, fasc. 2, 1956. pp. 535-536
READING AROUND THE TEXT: ON THE DIVERSITY OF READING PRACTICES IN THE NEW POPULAR LITERARY CULTURE
No full textPersson, M. (2015). Reading around the text: On the diversity of reading practices in the ne
Which Democracies Pay Higher Wages?
No full textThis paper asks if and how constitutions affect labour market outcomes. This question is motivated by Rodrik (1999), who suggests that 'democracies pay higher wages' and Persson and Tabellini (2003) who provide evidence that constitutions impact on economic outcomes. An empirical analysis using treatment effect estimators and Bayesian Model Averaging provides robust causal evidence that presidential democracies are associated with lower wages, after controlling for other potential determinants such as the level of income per capita.Democracy, Constitutions, Wages, Factor Shares, Bayesian Model Averaging
Diagnostic sensitivity of immunodominant epitopes of glutamic acid decarboxylase (GAD65) autoantibodies in childhood IDDM
No full textThe prevalence and titre of epitope-specific autoantibodies to glutamic acid decarboxylase (GAD65) in 155 insulin-dependent diabetic (IDDM) and 9 GAD65 antibody (Ab)-positive healthy children were determined using four GAD65/67 chimaeric molecules which discriminate among the N-terminal (N), middle (M) and C-terminal (C) epitopes of GAD65. Radioligand binding assays for IgG Ab used immunoprecipitation of in vitro translated 35S-GAD. We found autoantibodies to GAD65 in 116 of 155 (75 %), to GAD67 in 19 of 155 (12 %) (p < 0.0001) and to the GAD65-N-67 chimaera in 25 of 155 (16 %) (p < 0.0001) IDDM sera. GAD67Ab were found almost exclusively (17 of 19, 89 %) in GAD65Ab-positive sera and the levels of GAD67Ab correlated with those of GAD65Ab (r 2=0.5913; p=0.009). GAD65Ab directed to GAD65-M were found in 104 of 155 (67 %), to GAD65-C in 104 of 155 (67 %) and to GAD65-M + C in 116 of 155 (75 %) of IDDM sera. and indicated reactivity to at least two distinct epitopes. Among the nine GAD65Ab-positive healthy children, two (22 %) were also positive with GAD67, nine (100 %) with GAD65-M + C, seven (78 %) with GAD65-M, eight (89 %) with GAD65-C and two (22 %) with GAD65-N-67. Titres of GAD65Ab (p = 0.007), GAD65-C-Ab (p = 0.002) and GAD65C+M-Ab (p=0.101), but not of GAD65-M-Ab (p = 0.101) were significantly higher in IDDM than in healthy children. We conclude that GAD65Ab in IDDM and healthy children are directed to middle and C-terminal epitopes, and propose that levels of antibodies specifically directed to the carboxy-terminal end of GAD65 may distinguish IDDM from healthy children
Valeriana plateadensis A. J. Perez, C. Persson & J. N. Zapata 2023, sp. nov.
No full text1. Valeriana plateadensis Á.J. Pérez, C. Persson & J.N. Zapata, sp. nov. — Figures 1 A–C, 2 A–E Type: ECUADOR. Zamora-Chinchipe: Cantón Nangaritza, Parroquia Nuevo Paraíso. Reserva Biológica Cerro Plateado, [la cima de la meseta], -4.6194445, -78.7830556, 2900 m, 8 August 2021 (fl), A. J. Pérez, N. Zapata, T. L. P. Couvreur, C. Persson, R. Paqui, R. Cabrera & W. Santillán 11704 (holotype QCA-244410; isotypes GB-0210405, PRC). Shrub 20–25 cm tall with ± erect branches. Stem and branches terete covered with dead leaves basally, 0.5 to 1 cm wide (incl. leaves), slightly wider at the head-like top, branching rhythmic with 3–7 branches at each node. Leaves seemingly spirally arranged (but actually positioned in multiple ranks) and overlapping, sessile, glabrous, coriaceous, spatulate and sharply bent, proximal portion canaliculate, 5 × 1 mm, adpressed tightly to the shoot, distal portion widely oblong 2.1–2.3 × 2–2.2 mm, with rounded apex, above slightly concave with thickened margin, below sometimes with a raised narrowly triangular portion, fresh leaves generally spreading (forming an angle of 90° to the shoot), or in the uppermost portion of the shoots ascending to erect, dried and dead leaves the outer portion generally facing downwards. Inflorescence a loose cluster of up to 12 flowers at the top/end of the shoots, partial inflorescences of 2–3 flowers subtended by an opposite pair of involucral bracts that are entirely or fused in for 2/3. Flowers hermaphrodite? (neither pollen nor ovules seen); calyx vestigial; corolla funnelform, white, 3-lobed, the tube obconical, 3–3.5 mm long, 0.2 to 1.5 mm wide, the lobes widely ovate, ca 1.5 × 1 mm, apex obtuse; stamens 3, exserted, the filaments white, flattened, 2.5 mm long, inserted in the upper portion of the tube, anthers 0.2 × 0.1 mm; style slightly exserted, the stigma capitate, the ovary cylindrical 0.7 × 0.3 mm, glabrous with 1 pendent ovule. Fruits unknown. Additional specimens examined: ECUADOR. Zamora-Chinchipe, Nangaritza, Cordillera del Cóndor, Reserva Biológica Cerro Plateado, gently sloping summit area of Cerro Plateado, 4°37’10” S, 78°46’59” W, 2915 m, 24 August 2012 (fl), D. Neill, M. Asanza & E. Cueva 17494 (ECUAMZ); en la cima de la meseta, -4.6194445, -78.7830556, 2900 m, 23 September 2016 (fl), Á. J. Pérez, N. Zapata & W. Santillán 10175 (QCA-244424); 2850–2900 m, 27 September 2016 (fl), Á. J. Pérez, N. Zapata & W. Santillán 10329 (QCA-244532). Valeriana plateadensis is distinguished from other Valeriana species of the high Andes with 3-lobed corollas by being small sparsely branched shrubs with small spatulate and sharply bent densely set leaves in multiple ranks. Distribution and habitat:— Valeriana plateadensis is an endemic species to Cerro Plateado, Cordillera del Cóndor in southeast Ecuador where it has been collected on sandstone soil between rocks on the top of the Andean tepui at 2900 m (Figure 3A). Associated plants include Symplocos neillii Ståhl (2010: 86), Diplostephium sp. nov, Chusquea nana (Clark) Clark (2009: 681) and Drosera peruensis Silva & Correa (2002: 543) (Figure 3A). Conservation status: Only one population with ca. 40 mature individuals of this species were discovered at the type locality at the summit of the Cerro Plateado. It is an isolated area and difficult to access; nevertheless, climate change effects could affect the distribution and population size of this species negatively. According to the IUCN Red List criteria (IUCN 2022) this species is therefore assessed as Vulnerable (VU, Criterion D2). Phenology: Flowers were collected in August and September. Etymology: The specific epithet of this species refers to Cerro Plateado in the Cordillera del Cóndor in southeastern Ecuador which is the only known locality for this species.Published as part of Persson, Claes, Eriksen, Bente, Pérez, Álvaro J., Zapata, J. Nicolás, Couvreur, Thomas L. P. & Sklenář, Petr, 2023, Three new species of Valeriana (Valerianoideae, Caprifoliaceae) from southern Ecuador, pp. 47-53 in Phytotaxa 579 (1) on page 48, DOI: 10.11646/phytotaxa.579.1.5, http://zenodo.org/record/753210
Recensiones [Revista de Historia Económica Año XIX Primavera-Verano 2001 n. 2, pp. 451-492]
No full textEditada en la Fundación Empresa PúblicaBarciela López, C , y Melgarejo Moreno, J. (eds.). El agua en la Historia de España (Por Eloy Fernández Clemente).--
Catalán Martínez, E. El Precio del Purgatorio. Los ingresos del clero vasco en la Edad Moderna, Bilbao, 2000 (Por Angela Atienza).--
Arenas Posadas, C. Empresa, mercados, mina y mineros. Río Tinto 1873-1936 (Por Carmen Sarasúa).--
Aixalá Pastó, J. La peseta y los precios. Un análisis de largo plazo (1868-1995) (Por Xavier Cuadras Morató).--
García Ruiz, J. L., y Laguna Roldán, C. Cervezas Mahou, 1890-1998. Un siglo de tradición e innovación (Por Pablo Díaz Merlán).--
Larrianga Rodríguez, C. La Liga Cantábrica y el comercio del norte de España a finales del siglo XIX (Por Juan Manuel Mates Barco).--
Turrent, E. Historia del Banco de México, 1940-1946 (Por Carlos Marichai).--
Mesa-Lago, C. Market, Socialist and Mixed Economies. Comparative Policy and Performance: Chile, Cuba and Costa Rica (Por Rafael Pampillón Olmedo).--
Persson, K. G. Grain Markets in Europe, 1500-1900. Integration and Deregulation (Por Enrique Llopis Agelán).--
Martín Aceña, P., y Reís, J. (eds.). Monetary Standards in the Periphery: Paper, Silver and Gold (Por Eugene White)Publicad
Francesco Altomare - the remarkable mathematician and human being
No full textWe laconically describe the great contributions of Professor Francesco Altomare to mathematical research and PhD education, and his unique status in the mathematical community. In particular, we present and give examples of his innovative and great achievements related to the following areas of mathematics: Functional Analysis, Operator Theory, Potential Theory, Approximation Theory, Probability Theory, Function Spaces, Choquet's Theory, Dirichlet's Problem and Semigroup Theory. Moreover, we report on and give concrete examples of his unique way to work together with PhD students, both before and sometimes also after their dissertation. Finally, we shortly describe his remarkable “class travel” from “simple” conditions with no academic traditions in his family in the small hometown Giovinazzo to finally become the broad, ingenious, and powerful mathematician he is regarded to be today
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Hyperoxia avoidance and aggregation behavior in C. elegans
No full textLiving in the soil, C. elegans can move in three dimensions in search for food. To navigate, it partly uses oxygen levels as a description of its habitat. Oxygen tension may indicate presence of microbial food and location with respect to the surface, where oxygen is 21%. The N2 groups of C. elegans strains differ in their oxygen responses from other strains of this species collected in the wild. This difference is due to a polymorphism in the NPY receptor homologe, NPR-1. The result is two distinct feeding strategies; solitary feeding and feeding in groups (aggregation). NPR-1 antagonizes hyperoxia avoidance on food and N2-like strains, carrying a gain of function mutation in the receptor, feed alone and do not respond strongly to changes in ambient oxygen. In contrast, strains carrying the ancestral form of the receptor, NPR-1 215F, exhibit robust hyperoxia avoidance. These animals aggregate on food, at least in part because animals create a low oxygen environment as they form groups.
In paper I we examined how hyperoxia avoidance can trigger aggregation. We showed that when animals encounter a rise in oxygen they initiate a reversal and turn. We showed that similar behaviors direct the animal to stay in an aggregate, and that aggregated animals create a sharp oxygen gradient. We further showed that soluble guanylate cyclases, expressed in the body cavity neurons, and TRPV channels expressed in the nociceptive neurons ASH and ADL, regulate these behaviors.
---text removed from public version--- In paper III we showed that a polymorphic locus, encoding the neuroglobin glb-5, regulates hyperoxia avoidance. The ancestral allele, glb-5(Haw), acts in the body cavity neurons and tunes the dynamic range of these neurons to a narrow range close 21% oxygen. ---text removed from public version---
The data presented in this thesis thus provide novel insights into oxygen sensing in a metazoan, and highlight how oxygen responses promote aggregation behavior of a nematode
TRPV1-expressing sensory fibres and IBS: links with immune function
No full textP A Hughes, S M Brierley, C M Martin, T Liebregts, J Persson, B Adam, G Holtmann and L A Blacksha
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