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Search Results: 1 - 10 of 217106 matches for " Sara Maldonado-Martín "
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INFLUENCE OF PEDALING TECHNIQUE ON METABOLIC EFFICIENCY IN ELITE CYCLISTS
Jesús Cámara,Sara Maldonado-Martín,Xabier Artetxe-Gezuraga,Natalie Vanicek
Biology of Sport , 2012,
Abstract: Our objective was to investigate the influence of pedaling technique on gross efficiency (GE) at various exercise intensities in twelve elite cyclists ( ·VO2max=75.7 ± 6.2 mL·kg-1·min-1). Each cyclist completed a ·VO2max assessment, skinfold measurements, and an incremental test to determine their lactate threshold (LT) and onset of blood lactate accumulation (OBLA) values. The GE was determined during a three-phase incremental exercise test (below LT, at LT, and at OBLA). We did not find a significant relationship between pedaling technique and GE just below the LT. However, at the LT, there was a significant correlation between GE and mean torque and evenness of torque distribution (r=0.65 and r=0.66, respectively; p < 0.05). At OBLA, as the cadence frequency increased, the GE declined (r=-0.81, p < 0.05). These results suggest that exercise intensity plays an important role in the relationship between pedaling technique and GE.
PADDLING PERFORMANCE AND RANKING POSITION IN JUNIOR SURFERS COMPETING AT THE ASSOCIATION OF SURFING PROFESSIONALS: A PILOT STUDY CAPACIDAD DE REMADA Y POSICIóN EN EL RANKING DE SURFISTAS JUNIOR DE LA ASOCIACIóN DE SURFISTAS PROFESIONALES: UN ESTUDIO PILOTO
Jesús Cámara,Sara Maldonado-Martín,Juan Ramón Fernández López,Moises González Goyonaga
E-balonmano.com : Revista de Ciencias del Deporte , 2011,
Abstract: The aims of this pilot study are on one hand, to evaluate the upper body aerobic characteristics of junior surfers competing at the European branch of the Association of Surfing Professionals (ASP) and on the other, to assess the relationship between the junior surfers' upper body aerobic characteristics and their ranking position. Ten surfers competing at the European junior branch of the ASP took part in the study. The maximal oxygen uptake (VO2MAX), the maximum power output (WMAX), the maximum lactate concentration [La]MAX, the maximum heart rate (HRMAX) and the power output at the intensity where the lactate threshold and the onset of blood lactate accumulation are produced (WLT and WOBLA) were determined during an incremental maximal test in a swim bench ergometer. It was observed a lack of a significant relationship between the ranking position and the parameters at maximal intensity (VO2PEAK, WMAX, HRMAX y [La]MAX). The WLT (W · kg-1) and the WOBLA (W · kg-1) were significantly related to ranking position (r= -0.69, p= 0.02; r= -0.72, p= 0.01, respectively). Resumen Los objetivos de este estudio piloto son por un lado, determinar las características aeróbicas de surfistas junior que compiten en la rama Europea de la Asociación de Surfistas Profesionales (ASP) y por otro, analizar la relación de estas características con la posición en el ranking. Diez surfistas tomaron parte en el estudio. Se realizó un test máximo incremental en un ergómetro. Se determinaron el consumo máximo de oxígeno (VO2MAX), la potencia máxima (WMAX), la frecuencia cardiaca máxima (HRMAX), la máxima producción de lactato en sangre ([La]MAX) y la potencia en el umbral de lactato (WLT) y en el inicio de la acumulación de lactato en sangre (WOBLA). No se observó una relación significativa entre la posición en el ranking y los parámetros a intensidad máxima (VO2MAX, WMAX, HRMAX y [La]MAX). La WLT (W · kg-1) y la WOBLA (W · kg-1) mostraron una relación significativa con la posición en el ranking (r= -0.69, p= 0.02; r= -0.72, p= 0.01, respectivamente).
Reflexiones morales sobre los animales en la filosofía de Martha Nussbaum
Martín Blanco,Sara;
Revista de Bioética y Derecho , 2012, DOI: 10.4321/S1886-58872012000200006
Abstract: the main question about moral treatment to non-human animals is not anymore a matter of applied ethics, assumed by some intellectuals, but a social demand which urges for its resolution. as a response to this requirement, martha nussbaum, offers -opposite to the proposals by peter singer, richars m. hare or tom regan- a new perspective to abord the speciesist problem: the capabilities approach. in this article we expose the main ideas in the nussbaum iniciative, and question, as a discussion, some aspects on her capacities focus.
Taxonomic Distinctness and Richness of Helminth Parasite Assemblages of Freshwater Fishes in Mexican Hydrological Basins
Benjamín Quiroz-Martínez, Guillermo Salgado-Maldonado
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0074419
Abstract: In this paper, we analyse the distributional patterns of adult helminth parasites of freshwater fishes with respect to the main hydrological basins of Mexico. We use the taxonomic distinctness and the variation in taxonomic distinctness to explore patterns of parasite diversity and how these patterns change between zoogeographical regions. We address questions about the factors that determine the variation of observed diversity of helminths between basins. We also investigate patterns of richness, taxonomic distinctness and distance decay of similarity amongst basins. Our analyses suggest that the evolution of the fauna of helminth parasites in Mexico is mostly dominated by independent host colonization events and that intra - host speciation could be a minor factor explaining the origin of this diversity. This paper points out a clear separation between the helminth faunas of northern - nearctic and southern - neotropical components in Mexican continental waters, suggesting the availability of two distinct taxonomic pools of parasites in Mexican drainage basins. Data identifies Mexican drainage basins as unities inhabited by freshwater fishes, hosting a mixture of neotropical and nearctic species, in addition, data confirms neotropical and neartic basins/helminth faunas. The neotropical basins of Mexico are host to a richest and more diversified helminth fauna, including more families, genera and species, compared to the less rich and less diverse helminth fauna in the nearctic basins. The present analysis confirms distance - decay as one of the important factors contributing to the patterns of diversity observed. The hypothesis that helminth diversity could be explained by the ichthyological diversity of the basin received no support from present analysis.
Patterns of Distribution of the Helminth Parasites of Freshwater Fishes of Mexico
Benjamín Quiroz-Martínez, Guillermo Salgado-Maldonado
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0054787
Abstract: In order to draw patterns in helminth parasite composition and species richness in Mexican freshwater fishes we analyse a presence-absence matrix representing every species of adult helminth parasites of freshwater fishes from 23 Mexican hydrological basins. We examine the distributional patterns of the helminth parasites with regard to the main hydrological basins of the country, and in doing so we identify areas of high diversity and point out the biotic similarities and differences among drainage basins. Our dataset allows us to evaluate the relationships among drainage basins in terms of helminth diversity. This paper shows that the helminth fauna of freshwater fishes of Mexico can characterise hydrological basins the same way as fish families do, and that the basins of south-eastern Mexico are home to a rich, predominantly Neotropical, helminth fauna whereas the basins of the Mexican Highland Plateau and the Nearctic area of Mexico harbour a less diverse Nearctic fauna, following the same pattern of distribution of their fish host families. The composition of the helminth fauna of each particular basin depends on the structure of the fish community rather than on the limnological characteristics and geographical position of the basin itself. This work shows distance decay of similarity and a clear linkage between host and parasite distributions.
A Possible Hypoallergenic Cereal in Wheat Food Allergy and Baker’s Asthma  [PDF]
Alicia Armentia, Sara Martín, Araceli Diaz-Perales, Arantxa Palacín, Leticia Tordesillas, Manuel Herrero, Blanca Martín-Armentia
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.312A217
Abstract:

Background: Wheat is a potent allergen source and is one of the causes of baker’s asthma and food allergy. The best strategy for managing food hypersensitivity involves strict avoidance of the trigger. However, wheat is quite difficult to avoid. Several alternative strategies for the treatment of food allergy are under study. Spelt is a possible hypoallergenic crop that may be tried in patients with wheat allergy. Methods: We have evaluated the allergenic IgE hypersensitivity mediated by spelt in wheat allergic patients. Overall, 66 patients who suffered from baker’s asthma or food allergy (45 males and 21 females, mean age 28.6 ± 12.9 years) were included. We have also compared its reactivity with standard- ized extracts from wheat and with purified non-specific lipid transfer proteins from wheat (Tri a 14) and from peach (Pru p 3). Immunodetection with spelt and common bread wheat extracts (Triticum aestivum, cultivar Astral) was per- formed. Fresh wheat and spelt grain extracts were used both for oral and bronchial challenge and skin tests. Specific IgE detection to different cereals was performed using the Immuno CAP System (Phadia, Uppsala, Sweden). The bronchial challenge was positive with wheat Astral in 44 (67%) patients, all of them suffered from asthma. Thirteen (29.54%) of these 44 patients had negative the challenge with spelt. The oral challenge with wheat Astral was positive in 22 (33%) patients with wheat food allergy, and the same test was positive in only in 6 of them with spelt (27.3%). The diagnostic yield (sensitivity, specificity and predictive values) of routine tests

Effect of Water Regimes on Dietary Fiber, Polyphenols and Antioxidant Capacity of Black and Pinto Beans  [PDF]
Maribel Ovando-Martínez, Salvador Horacio Guzmán-Maldonado, Senay Simsek, Luis Arturo Bello-Pérez, Perla Osorio-Díaz
Agricultural Sciences (AS) , 2014, DOI: 10.4236/as.2014.54036
Abstract:

Beans are rich in dietary fiber and polyphenols; however, growing conditions may affect the occurrence of these components. The effect of irrigation and rain fed conditions on dietary fiber, indigestible fraction, polyphenols and antioxidant capacity of Black 8025 and Pinto Durango bean cultivars grown in Mexico have been determined. Total dietary fiber decreased in beans grown under rain fed conditions compared to those grown under irrigation. The water regimes had an effect on the total indigestible fraction for Black 8025 bean. The extractable polyphenols were affected by the water regimes, while the antioxidant capacity of extractable and non-extractable polyphenols was dependent on the bean variety. Cooking the beans altered the extractable and non-extractable polyphenols and the antioxidant capacity. Also, the antioxidant properties and some extend, the digestibility of non-digestible carbohydrates of beans were affected by water regimes. This information could be taken into account for dry bean breeding programs to improve the nutritional quality of beans.

Seguimiento de la cumplimentación del registro de enfermería en la unidad de hemodiálisis
ángel Jiménez Maldonado,Ana Belén Martínez Galán,Sonsoles García Millán
Enfermería Nefrológica , 2012,
Abstract:
Recent advances in systemic therapy. Advances in adjuvant systemic chemotherapy of early breast cancer
Sara López-Tarruella, Miguel Martín
Breast Cancer Research , 2009, DOI: 10.1186/bcr2226
Abstract: Adjuvant systemic therapies were originally developed in an attempt to eradicate residual micrometastatic disease immediately after local control, in order to reduce the risk for cancer recurrence and death. From 10% to 30% of lymph node-negative breast cancer patients and 35% to 90% of lymph node-positive patients will eventually relapse with local therapy alone, because of occult micrometastatic disease [1]. Randomized clinical trials (discussed below) have identified survival benefits from adjuvant therapy, with estimated reductions in the annual odds of death ranging from 8% to 28%. These benefits are maintained in patients outside the controlled conditions of clinical trials and have contributed, alongside screening programs, to an overall reduction in breast cancer mortality between 1975 and 2000 [2].During the late 1960s the earliest clinical trials in the field began to evaluate the biologic concept of adjuvant chemotherapy in node-positive breast cancer, determining the effects of various chemotherapy regimens compared to observation after surgery to remove the primary tumor [3]. These trials clearly demonstrated benefit from adjuvant chemotherapy in the subgroup of patients at high risk for recurrence [4,5]. Chemotherapy combinations including cyclophosphamide, methotrexate, and 5-fluorouracil (CMF) have exhibited long-term effectiveness in women with node-positive breast cancer [6]. CMF-like regimens were able to reduce the annual odds of recurrence and death in operable breast cancer patients by 24% (± 3%) and 14% (± 4%), respectively [7].Subsequently, during the late 1970s and early 1980s, anthracycline-containing combinations were tested in prospective randomized adjuvant trials. Overall, the anthracycline regimens (5-fluorouracil, doxorubicin, and cyclophosphamide [FAC]; 5-fluorouracil, epirubicin, and cyclophosphamide [FEC]; and doxorubicin and cyclophosphamide [AC], among others) are associated with reductions in the risk for recurrence of 11.2% (2P
Efectos de las promociones en precios sobre la satisfacción del turis-ta: Examen de la relación entre el precio y la satisfacción
Campo Martínez, Sara,Yagüe Guillén, María
PASOS : Revista de Turismo y Patrimonio Cultural , 2007,
Abstract: In the tourist market, price promotions are frequently used in order to encourage the sales of a product. Nevertheless, the use of this promotional tool may affect the consumer’s evaluation of the purchase and the long-term business results. This study analyzes the effect of price promotions on the tourist’s evaluation of the package tour acquired and on his or her level of satisfaction. An empirical inves-tigation is performed, which was focused on tourists who travelled from Spain to South America, Central America or Caribbean through the purchase of a package tour. Results indicate that the perceived quality of the trip is the most important variable on the formation of satisfaction. Moreover, the effect of promotions in the satisfaction is nonlinear, indirect and negative
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