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The registration of morphofunctional parameters: its evaluation in children-karate athletes El registro de parámetros morfofuncionales: su evaluación en ni os-atletas de karate-do
Harold Pérez Soriano,Angel Regueiro Gómez
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i1.2
Abstract: With the development of national and international practice of Karate-Do as a sport of combat in Cuba, and especially when practiced often by children, morphofunctional control is important for athletes, observing the response of the body still in the making during training and competition in a given preparation macrocycle, as negative results (psychological and / or physical) can be brought to a wrong direction to achieve a given objective competitive. This research identifies and examines indicators for assessing the morphofunctional development of children, developing athletes in the category 10-11 years (weight, height, reach the arms and legs, heart rate, arterial blood pressure and respiratory rate etc.) This allows a better characterization of this sport at an early age and therefore, better health benefit of practitioners in the public interest and national sports. A partir del desarrollo de la práctica nacional e internacional del Karate-Do como deporte de combate en Cuba, y en especial cuando suele ser practicado por ni os, es importante el control morfofuncional de los atletas, observándose la respuesta del organismo aún en proceso de formación durante los entrenamientos y las competencias en un determinado macrociclo de preparación, pues resultados negativos (psicológicos y/o físicos) pueden ser provocados ante una errónea dirección para alcanzar un determinado objetivo competitivo. En esta investigación se definen y analizan indicadores para la evaluación del desarrollo morfofuncional de ni os-atletas en desarrollo en la Categoría 10-11 a os (peso, talla, alcance de brazos y piernas; Frecuencia Cardiaca, Presión Sanguínea Arterial y Frecuencia Respiratoria entre otros), lo cual permite una mejor caracterización de la práctica de este deporte en edades tempranas y por ende, un mejor beneficio en la salud de los practicantes y en beneficio del interés deportivo nacional.
Potential negative effects of chlorinated swimming pool attendance on health of swimmers and associated staff
M Zarzoso,S Llana,P Pérez-Soriano
Biology of Sport , 2010,
Abstract: Swimming is a recommended activity to achieve good health and to prevent certain pathologies of the circulatory, pulmonary and locomotive systems. However, recent research has focused on the possible hazard of chlorinated swimming pools. Chlorine reacts with organic compounds found in the water, giving way to the formation of disinfection by-products (DBPs). DBPs enter the human body by water ingestion, inhalation and dermal absorption. The most important DBPs are trihalomethanes, like chloroform, and chloramines, mainly trichloramine. Acute problems by accidental exposure to chlorine and its DBPs were reported years ago but their chronic effects have only been known since the beginning of the 21st century. Recent studies connect swimming in chlorinated pools with the prevalence of panting, asthma and hay fever. Besides, several DBPs are volatile and can be inhaled, not only by swimmers but also by those near the swimming pool. Although there are other environmental factors that could contribute to the increase of respiratory disorders, some authors have given rise to the so-called chlorine hypothesis” which postulates that the increase in asthma in developed countries can be explained, in part, by the effects of DBPs present in chlorinated swimming pools. In order to constrain their potential negative effects, it is necessary (a) to control the amount of chemical agents used in swimming pools, (b) not to raise water temperature excessively, (c) to maintain effective ventilation and (d) to have strict hygiene rules for swimmers. However, the best way to avoid these problems would be using alternative disinfection systems.
Relación entre ocupación y conservación intelectual en ancianos institucionalizados
Micaela Marrero .,Lusabel Pérez,Clara Eugenia Prada,Patricia Soriano
Revista Latinoamericana de Psicología , 1982,
Abstract:
OBTENCIóN DE ETANOL A PARTIR DE RESIDUOS DE PODA, MEDIANTE HIDRóLISIS áCIDA E HIDRóLISIS ENZIMáTICA
Tejeda,Lesly; Quintana,Julio; Pérez,Jairo; Young,Harold;
Revista U.D.C.A Actualidad & Divulgación Científica , 2011,
Abstract: this research pretended to evaluate the use of yard pruning residues and to look for raw materials to produce bio-fuels. the hydrolysis of lignocellulosic biomass contained in the waste of the tree trimming at the fundación universitaria tecnológico comfenalco was carried out to produce glucose syrups to, potentially, be converted into bio-ethanol. two methods were employed, the acid hydrolysis using dilute sulfuric acid and the enzymatic hydrolysis using cellulose enzymes. as a result, a higher conversion of all samples was obtained with the acid hydrolysis (between 10 to 30g/l of glucose) as with the enzymatic hydrolysis of mixed waste (8.83g/l of glucose), suggesting that bio-fuels can be obtained, beginning from this type of vegetal residues. it is necessary to optimize the process in order to improve the output in the glucose production.
OBTENCIóN DE ETANOL A PARTIR DE RESIDUOS DE PODA, MEDIANTE HIDRóLISIS áCIDA E HIDRóLISIS ENZIMáTICA ETHANOL FROM WASTE OF PRUNING BY ACID HYDROLYSIS AND ENZYMATIC HYDROLYSIS
Lesly Tejeda,Julio Quintana,Jairo Pérez,Harold Young
Revista U.D.C.A Actualidad & Divulgación Científica , 2011,
Abstract: En esta investigación, se pretendió estudiar el aprovechamiento de los residuos de poda y la búsqueda de materias primas para producir biocombustibles. Se llevó a cabo la hidrólisis de la biomasa lignocelulósica contenida en los residuos de poda, de la Fundación Universitaria Tecnológico Comfenalco, con el fin de producir jarabes glucosados para, potencialmente, ser convertidos en bioetanol. Se aplicaron dos metodologías: la hidrólisis ácida, usando ácido sulfúrico diluido y la hidrólisis enzimática, con enzimas celulasas. A manera de resultados, se obtuvo una mayor conversión con la hidrólisis ácida de todas las muestras (entre 10 y 30g/L de glucosa) que con la hidrólisis enzimática de los residuos mezclados (8,83g/L de glucosa), quedando abierta la posibilidad de obtener biocombustibles a partir de este tipo de residuos. Se hace necesaria la optimización de los procesos con el propósito de mejorar el rendimiento en la producción de glucosa. This research pretended to evaluate the use of yard pruning residues and to look for raw materials to produce bio-fuels. The hydrolysis of lignocellulosic biomass contained in the waste of the tree trimming at the Fundación Universitaria Tecnológico Comfenalco was carried out to produce glucose syrups to, potentially, be converted into bio-ethanol. Two methods were employed, the acid hydrolysis using dilute sulfuric acid and the enzymatic hydrolysis using cellulose enzymes. As a result, a higher conversion of all samples was obtained with the acid hydrolysis (between 10 to 30g/L of glucose) as with the enzymatic hydrolysis of mixed waste (8.83g/L of glucose), suggesting that bio-fuels can be obtained, beginning from this type of vegetal residues. It is necessary to optimize the process in order to improve the output in the glucose production.
ANALSIS DEL PATRóN Y LAS PRESIONES PLANTARES DURANTE LA RECEPCIóN EN UNA COLCHONETA
P. Pérez Soriano,S. Llana Belloch,E. Alcántara Alcocer,F. Huertas
Motricidad : European Journal of Human Movement , 2010,
Abstract: Dentro de las rutinas de la gimnasia deportiva, un elemento común son las recepciones sobre la colchoneta. En este sentido, diversos han sido los estudios cinéticos y cinemáticos realizados sobre la recepción y cuyos resultados pueden han sido útiles para la mejora en la compresión de la recepción y dise o de colchonetas. No obstante, el estudio de las presiones plantares durante la recepción no ha sido desarrollado por ninguna investigación a pesar de que el pie transmite al cuerpo las cargas de reacción generadas en el contacto con la colchoneta y dependiendo de su magnitud, frecuencia y punto de aplicación se pueden producir diferentes lesiones. El conocimiento de dichas cargas es importante no solo para la prevención de lesiones o criterios en el dise o de colchonetas, sino también para la mejora del rendimiento deportivo, mejorando la estabilidad durante la recepción. El presente trabajo muestra cuales son las zonas del pie a analizar, el patrón y las magnitudes de las presiones plantares durante una recepción tras un salto.
WATER IMMERSION AS A POST-EFFORT RECOVERY FACTOR. A SYSTEMATIC REVIEW
Chulvi-Medrano. I.,LLana-Belloch. S. 1,Pérez-Soriano, P.
Citius Altius Fortius , 2009,
Abstract: In physical preparation is well established the importance of recovery processes in order to achieve highlevels of performance. Therefore, and due to the high demands required in the current sports competitions, toenhance recovery processes play an important role in the final performance. Water immersions have been usedas a recovery agent by coaches for long. However, only in recent years have been published scientific paperswhich investigate this topic. The purpose of this work was to establish a theoretic framework based on thesepublications. It has conducted a thorough bibliographical review in databases Pubmed and SportDiscus, usingthe keywords “Post-exercise recovery "," water immersion "," thermal responses” and “cryotherapy”. Afterpurifying the papers retrieved, 39 papers were obtained, of which 33 are original research work and 6 arereviews. We must highlight a limiting factor in the extraction of general conclusions: the absence of standard protocols. Therefore, sometimes it is difficult to compare results from different studies. However, two conclusions can be drawn: (1) Hot water (> 33o C) is not a good regenerating agent post-effort, and (2)immersion in cold water (15oC) for 1o minutes, split into periods, facilitates regenerative processes post-effort.About contrasts (alternate cold and hot water) there is less information and results are sometimes contradictory.
BIOMECHANICAL FACTORS TO BE TAKEN INTO ACCOUNT TO PREVENT INJURIES AND IMPROVE SPORTING PERFORMANCE ON ARTIFICIAL TURF
Pedro Pérez-Soriano,Salvador Llana-Belloch,Juan M. Cortell-Tormo,José A. Pérez-Turpin
Journal of Human Sport and Exercise , 2009,
Abstract: This article reviews existing knowledge concerning the epidemiology, instruments and regulatory criteria currently used to evaluate artificial turf soccer pitches. Recent years have seen tremendous growth in the use of artificial turf as a playing surface for sports (rugby, soccer, American football…) and the problems traditionally associated with artificial turf and its relationship with a higher percentage of injuries seem to be disappearing. The contribution of biomechanics to the development of new techniques and instruments for analysing the properties and characteristics of grass pitches has contributed towards close collaboration with the regulatory bodies of different sporting organisations to define standards and criteria that guarantee not only the safety of the sportsmen and women, but also ensure performance and entertainment. Absorption of impacts, friction and traction, abrasion and factors associated with the mobile element and its interaction with artificial turf are the properties evaluated using a wide range of methodologies and instruments. In this sense, instruments such as the “Artificial Athlete” and the “Stuttgart Skiddometer” have helped different standards (DIN, BSI, AENOR, AFNOR, FIFA…amongst others) to define criteria for the homologation of a certain artificial turf surfaces.
Experimental and Theoretical Study of Lanthanide Complexes Based on Linear and Macrocyclic Polyaminopolycarboxylic Acids Containing Pyrazolylethyl Arms
Elena Pérez-Mayoral,Elena Soriano,Sebastián Cerdán,Paloma Ballesteros
Molecules , 2006, DOI: 10.3390/11050345
Abstract: We report the synthesis of two novel Gd(III)-complexes derived from linear and macrocyclic polyaminopolycarboxylic acids 1 and 2, which contain a 3,5- dimethylpyrazolyl-ethyl arm, and a study of their relaxivity properties. The relationships between the experimental and theoretical results have provided interesting information about the kinetic and thermodynamic stability of these complexes.
The influence of the 1992-1993 el ni?o on the reproductive biology of Scomber japonicus peruanus (Jordán & Hubb, 1925)
Caramantin-Soriano, Hilda;Vega-Pérez, Luz Amelia;?iquen, Miguel;
Brazilian Journal of Oceanography , 2009, DOI: 10.1590/S1679-87592009000400002
Abstract: the influence of the 1992-1993 el ni?o events on the reproductive behavior of the scomber japonicus peruanus (chub mackerel) was studied from samples collected monthly, along the peruvian coast (3o23's-14o00's), from january 1990 to december 1993. the monthly variation of the gonadosomatic index and the frequency of the periods of gonad maturation evidenced that the spawning of the species occurred all year long, being more intense in summer. the values of the gonadosomatic index were higher during the occurrence of the 1992-1993 el ni?o, while the body weight and gonad weight decreased. regarding the condition factor, its values decreased in females over 35 cm in fork length.
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