2,608 research outputs found

    Fartet – Aphanius iberus (Valenciennes in Cuvier y Valenciennes, 1846)

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    Peces - Orden Cyprinodontiformes - Familia Cyprinodontidae en la Enciclopedia Virtual de Vertebrados Españoles, http://www.vertebradosibericos.org/. Versiones anteriores: 9-02-2009; 9-03-2012A comprehensive review of the natural history of the Spanish toothcarp Aphanius iberus in Spain.Peer reviewe

    Adequacy of Parenteral Nutrition in Preterm Infants According to Current Recommendations: A Study in A Spanish Hospital

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    Background: In preterm infants, it is important to ensure adequate nutritional intake to accomplish foetal growth requirements. This study evaluated clinical practice regarding the prescription of parenteral nutrition in preterm infants in the neonatology unit of a tertiary hospital. Methods: It was a retrospective observational study of a sample of preterm infants (n = 155) born between January 2015 and December 2017 who were prescribed parenteral nutrition. Compliance with the hospital’s protocol and with the guidelines of the scientific societies American Society for Parenteral and Enteral Nutrition (ASPEN), European Society for Clinical Nutrition and Metabolism (ESPEN) and Spanish Society of Clinical Nutrition and Metabolism (SENPE) was evaluated. The differences in macronutrient intake and total duration of parenteral nutrition were analysed according to gestational age and birth weight. Results: The established protocol was followed in a high percentage (95.5%–100%) except with respect to the initiation of supplying established trace elements (64.9%). Compliance with the recommendations set forth in the guidelines was between 82.1% and 100%, with the exception of the initial carbohydrate intake recommended by ASPEN and ESPEN, for which compliance was 8.3%. Lower gestational age and birth weight were correlated with longer duration of parenteral nutrition (p < 0.001). Conclusions: A lower gestational age and birth weight are related to a longer duration of parenteral nutrition. The results of this study demonstrate the importance of developing and evaluating protocols in clinical practice

    Cyt c6-3: A new isoform of photosynthetic Cyt c6 exclusive to heterocyst-forming cyanobacteria

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    All known cyanobacteria contain Cyt c6, a small soluble electron carrier protein whose main function is to transfer electrons from the Cyt b6 f complex to PSI, although it is also involved in respiration. We have previously described a second isoform of this protein, the Cyt c6-like, whose function remains unknown. Here we describe a third isoform of Cyt c6 (here called Cytc6-3), which is only found in heterocyst- forming filamentous cyanobacteria. Cyt c6-3 is expressed in vegetative cells but is specifically repressed in heterocysts cells under diazotrophic growth conditions. Although there is a close structural similarity between Cyt c6-3 and Cyt c6 related to the general protein folding, Cyt c6-3 presents differential electrostatic surface features as compared with Cyt c6, its expression is not copper dependent and has a low reactivity towards PSI. According to the different expression pattern, functional reactivity and structural properties, Cyt c6-3 has to play an as yet to be defined regulatory role related to heterocyst differentiation.FundaciĂłn de InvestigaciĂłn de la Universidad de Sevilla FIUS05710000Ministerio de EconomĂ­a y Competitividad BIO2012-35271, BIO2015-64169-PJunta de AndalucĂ­a PAIDI BIO-02

    The effect of different loads on semi-tethered swimming and its relationship with dry-land performance variables

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    Semi-tethered loaded swimming (denoted STLS) has been used widely to develop or test swimmers skills, although its transference to increase performance seems overestimated. In addition, its relationship with dry-land tests remains obscured by imprecise reports. Sixteen competitive male swimmers (age: 18.31 ± 1.42) participated in a two-fold purpose study: Firstly, swimming performance was assessed at different STLS intensities on an adapted Smith Machine. A repeated measures 1-way ANOVA was conducted to find differences between the variables collected through a linear encoder at 15, 30, 45 and 60% of the maximal load (ML). Secondly, the relationships between the swimming velocities and the different sorts of variables obtained on a dry-land arm-stroke strength test were studied by Pearson’s correlation coefficient (r). The results showed that less velocity, acceleration and impulse were delivered at high loads (p < 0.001). It increased the velocity fluctuation, affecting the swimming patterns adversely. On the other hand, the correlations between velocity-based dry-land variables and swimming velocities (r = 0.71) seem to be more suitable to predict swimming performance, rather than strength-based variables (r = 0.49). In conclusion, coaches should reconsider using STLS, as little or no benefit may be obtained in performance.CTS-527: Actividad física y deportiva en el medio acuátic

    Smart tourism city governance: exploring the impact on stakeholder networks

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    Purpose – Building on new trends in tourism and smart city governance, this study aims to examine the degree of interrelation between stakeholder networks involved in tourism governance and smart city development. A model describing the transition towards smart tourism city governance is proposed. Design/methodology/approach – The proposed model is tested through a multiple case study of seven European cities. This choice of sample makes the study highly representative. Data collection is based on an exhaustive search and analysis of available data on smart city initiatives, destination management organisations and tourism plans. Social network analysis using Gephi software is used to build stakeholder networks. Findings – Analysis of the stakeholder networks that shape tourism governance and smart initiatives in several cities reveals a disconnection between the two types of networks. The results show limited progress towards the expected synergies of true smart tourism city governance. Practical implications – Theoretically, the study contributes to the debate on new forms of governance for the complex evolution of urban tourism. In practice, the relationship between tourism governance and smart city initiatives needs to be redefined to achieve synergies that increase the inclusiveness and efficiency of urban tourism policies. Originality/value – This study examines the under-researched topic of the interrelation between tourism governance and smart city initiatives. By comparing the networks of actors resulting from these two processes, it assesses the extent to which this interrelation helps the emergence of new governance models (smart tourism city governance)

    Expanding our understanding of cruise visitors' expenditure at destinations: The role of spatial patterns, onshore visit choice and cruise category

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    Cruise tourism is an important and growing source of visitors to destinations. To expand our knowledge of this phenomenon, this study incorporates three new drivers into the analysis of the expenditure patterns of cruise passengers at destinations, namely, spatial intra-destination behavior (single node, multiple node, or hinterland), onshore visit choice (independent or guided), and cruise category (standard, premium, luxury, or exclusive). The study uses quantile regression to unearth the intricacies of the proposed relationships and a dataset that combines GPS tracking technologies and traditional surveys. Results suggest that the mobility pattern, onshore visit choice, and time spent at a destination of cruise visitors have significant effects on their expenditures. However, these effects vary along with the level of expenditure, whereas cruise category does not exert a clear effect on expenditure. The implications for destination management organizations are also discussed.Research carried out within the project “Analysis of planning processes applied to smart cities and smart tourism destinations. Balance and methodological proposal for tourist spaces: Smart Tourism Planning” (CSO2017-82592-R) under the Spanish National R&D&I Plan funded by the Ministry of Economy, Industry and Competitiveness/[UAFPU2016-014]

    Análisis del rendimiento en salto vertical, agilidad,

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    Objetivo Analizar la influencia de la categoría de edad en la capacidad de salto, sprint, agilidad y velocidad de golpeo en futbolistas jóvenes. Método Estudio transversal en el que participaron 36 jugadores de nivel subélite provenientes de las categorías inferiores (cadete y juvenil) de equipos de fútbol andaluces (edad: 15,87 ± 1,43 años; masa corporal: 65,38 ± 10,84 kg; altura: 1,71 ± 0,06 m). Se evaluó la composición corporal, el rendimiento en salto vertical (CMJ), la agilidad mediante el test de Balsom, velocidad de sprint en 5, 10, 20 y 30 m y la velocidad de golpeo con ambas piernas. Resultados Los análisis mostraron que los jugadores juveniles tienen mayor rendimiento en los test de CMJ, agilidad y velocidad de golpeo con ambas piernas que los cadetes. No se aprecian diferencias significativas (p ≥ 0,05) en la prueba de velocidad, aunque se evidencia una clara tendencia a favor de los juveniles. Conclusión Existe efecto de la edad durante la etapa de la adolescencia sobre la capacidad de salto, la agilidad, la velocidad de golpeo y, en menor medida, sobre la velocidad de jóvenes jugadores de fútbol, además de asociación entre las capacidades condicionales más influyentes en el rendimiento del futbolista

    AnĂ lisi del rendiment en el salt vertical, agilitat i velocitat

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    Objectiu Analitzar la influència de la categoria d’edat en la capacitat de salt, esprint, agilitat i velocitat de xut de futbolistes joves. Mètode Estudi transversal en què participaren 36 jugadors de nivell subelit provinents de les categories inferiors (cadet i juvenil) d’equips de futbol andalusos (edat: 15,87 ± 1,43 anys; massa corporal: 65,38 ± 10,84 kg; alçada: 1,71 ± 0,06 m). S’avaluà la composició corporal, el rendiment en el salt vertical (CMJ), l’agilitat mitjançant el test de Balsom, la velocitat d’esprints en 5, 10, 20 i 30 m i la velocitat del xut amb ambdues cames. Resultats Les anàlisis mostraren que els jugadors juvenils tenien un rendiment major en els tests del CMJ, agilitat i velocitat de xut amb ambdues cames que els cadets. No s’aprecien diferències significatives (p ≥ 0,05) en la prova de velocitat, tot i que s’evidencia una tendència clara a favor dels juvenils. Conclusió Existeix l’efecte de l’edat durant l’etapa de l’adolescència sobre la capacitat de salt, l’agilitat, la velocitat de xut i, en menor mesura, sobre la velocitat dels jugadors de futbol joves, a més d’associació entre les capacitats condicionals, més influents en el rendiment del futbolista

    Sinorhizobium fredii Strains HH103 and NGR234 Form Nitrogen Fixing Nodules With Diverse Wild Soybeans (Glycine soja) From Central China but Are Ineffective on Northern China Accessions

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    Sinorhizobium fredii indigenous populations are prevalent in provinces of Central China whereas Bradyrhizobium species (Bradyrhizobium japonicum, B. diazoefficiens, B. elkanii, and others) are more abundant in northern and southern provinces. The symbiotic properties of different soybean rhizobia have been investigated with 40 different wild soybean (Glycine soja) accessions from China, Japan, Russia, and South Korea. Bradyrhizobial strains nodulated all the wild soybeans tested, albeit efficiency of nitrogen fixation varied considerably among accessions. The symbiotic capacity of S. fredii HH103 with wild soybeans from Central China was clearly better than with the accessions found elsewhere. S. fredii NGR234, the rhizobial strain showing the broadest host range ever described, also formed nitrogen-fixing nodules with different G. soja accessions from Central China. To our knowledge, this is the first report describing an effective symbiosis between S. fredii NGR234 and G. soja. Mobilization of the S. fredii HH103 symbiotic plasmid to a NGR234 pSym-cured derivative (strain NGR234C) yielded transconjugants that formed ineffective nodules with G. max cv. Williams 82 and G. soja accession CH4. By contrast, transfer of the symbiotic plasmid pNGR234a to a pSym-cured derivative of S. fredii USDA193 generated transconjugants that effectively nodulated G. soja accession CH4 but failed to nodulate with G. max cv. Williams 82. These results indicate that intra-specific transference of the S. fredii symbiotic plasmids generates new strains with unpredictable symbiotic properties, probably due to the occurrence of new combinations of symbiotic signals.España, Junta de Andalucía P11-CVI-7500España Ministerio de Economía y Competitividad BIO2016-78409-
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