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Search Results: 1 - 10 of 35254 matches for " Torres Rodríguez "
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El papel de los microorganismos en la biodegradación de compuestos tóxicos
Duilio Torres Rodríguez
Ecosistemas , 2003,
Abstract:
Discurso de Agradecimiento del Profesor Dr. Alberto Rodríguez Torres, al Nombramiento como Maestro de la Anatomía de Chile
Alberto Rodríguez Torres
International Journal of Morphology , 2005,
Abstract:
Implementación de filtro Fir en sistemas programables en un Chip
Idileisy Torres Rodríguez
Ingenier?-a Electr?3nica, Autom??tica y Comunicaciones , 2011, DOI: 10.1234/rielac.v31i2.61
Abstract: Los filtros (analógicos y digitales) se usan para la separación de se ales combinadas y la restauración de se ales que presentan alguna distorsión. Los filtros digitales alcanzan mejores resultados, con precisión limitada por errores de redondeo en la aritmética empleada. El dise o de un filtro digital con respuesta finita al impulso (FIR) y la cuantización de sus coeficientes para facilitar su implementación en PSoC es el tema de este trabajo.
Caracterizaciones biológicas en la Hacienda Macondo (Mapiripán, Meta)
Rodríguez Torres,Diego A.;
ORINOQUIA , 2010,
Abstract: a fauna and flora inventory has been made as part of the environmental baseline of the hacienda macondo. the farm has 5680 hectares, consisting of natural environments such as natural savanna, gallery forest and morichales. inventories have been made in these natural environments under standardized methods of rapid ecological assessment (rea) oriented towards focus groups of fauna and flora. the results were the following: 63 families, 114 genders and 205 species of vascular plants; 35 families, 16 orders and 65 genders of birds; 32 species of mammals; 39 species of amphibians (9 amphibians and 30 reptiles); 2 classes, 16 families, 6 orders, 24 genders and 36 species of fish. the characterization of insects was focused on beetles, ants, bees, butterflies and orchid bees, reporting 11 families, 2 orders, 23 genders and 53 species. there have been several reports of endangered species and of the accelerated loss of vegetative cover because of fires and illicit crops.
Empleo de los ensayos con plantas en el control de contaminantes tóxicos ambientales
Torres Rodríguez,Marina Teresa;
Revista Cubana de Higiene y Epidemiolog?-a , 2003,
Abstract: the increasing industrial and urban development has brought about the appearance of a considerable number of toxic chemicals, which affect not only human health, but that of the ecosystems in developed and developing countries, too. rapid bioassays have been implemented with the use of plants as testing organisms that work as good tools in the initial screening. the advantages of the plants to be incorporated in batteries of assays in the detection and control of the environmental toxic pollutants are stressed. reference is made to two of the bioassays with plants that may be useful and available in the toxicological evaluation of environmental samples.
Empleo de los ensayos con plantas en el control de contaminantes tóxicos ambientales
Marina Teresa Torres Rodríguez
Revista Cubana de Higiene y Epidemiología , 2003,
Abstract: El creciente desarrollo industrial y urbano ha traído consigo la aparición de una cantidad apreciable de sustancias químicas tóxicas, lo cual afecta tanto la salud humana como la de los ecosistemas en países desarrollados y en vías de desarrollo. Recientemente se han instrumentado bioensayos rápidos con el empleo de plantas como organismos de prueba, los que funcionan como buenas herramientas de pesquisa inicial. Se se alan las ventajas que tienen las plantas para ser incorporadas en baterías de ensayo para medir alarma de peligro ambiental. Se destaca la importancia del empleo de bioensayos con plantas en la detección y control de los contaminantes tóxicos ambientales. Se hace referencia a dos de los bioensayos con plantas que pueden resultar disponibles y de utilidad en la evaluación toxicológica de muestras ambientales. The increasing industrial and urban development has brought about the appearance of a considerable number of toxic chemicals, which affect not only human health, but that of the ecosystems in developed and developing countries, too. Rapid bioassays have been implemented with the use of plants as testing organisms that work as good tools in the initial screening. The advantages of the plants to be incorporated in batteries of assays in the detection and control of the environmental toxic pollutants are stressed. Reference is made to two of the bioassays with plants that may be useful and available in the toxicological evaluation of environmental samples.
Neoplasia, nasal cavity, paranasal sinuses, canines. Neoplasias de Cavidad nasal y senos paranasales en caninos
Giovanni Torres,Sandra Rodríguez
Cultura Científica , 2008,
Abstract: Nasal cavity and paranasal sinuses Neoplasia in caninesare scarce, coming to just the 1.5% of all diagnosedcancer in this species. With reference to the totalof respiratory tract′s tumors they represent between 60 and 80% of all the diagnoses. They are more common inlong-nosed canines, with no preference for gender. Dueto their behavior, the neoplasia developed in nasal cavity or paranasal sinuses can be both, benign or malignant, being the latter the most frequent one. Taking into account the origin tissue they may be epithelial, of connective tissue, and from some other originas lymphomas and the transmissible sexual tumor. Thesymptoms onset is associated with the ability of obstructingthe airways and the local invasion and destruction oftissue. In general, clinical associated signs consist monoor bilateral difficulty to breath, sneezing, nasal discharge, nose bleeding and masses of varied size and shape. The diagnosis is based on the symptoms appearance and cytologic and histological evaluation of injuries, beingthe latter 100% diagnostic. The treatment consists inthe surgical extraction combined with radiation therapy and chemotherapy. Las neoplasias de cavidad nasal y senos paranasales en caninos son de escasa presentación; llegan tan sóloal 1.5% de los quistes diagnosticados en esta especie.Con referencia al total de tumores del tracto respiratorio representan entre el 60 y el 80%. Son más comunes en caninos de nariz larga, no existe predilección por género; por el comportamiento, las neoplasias que se desarrollanen la cavidad nasal y senos paranasales son benignas y malignas, siendo estas últimas las más frecuentes. Teniendo en cuenta el tejido de origen pueden ser epiteliales, mesenquimales y de otro origen como los linfomas y el tumor venéreo transmisible. La apariciónde la sintomatología se asocia con la capacidad de obstruir las vías aéreas, la invasión y destrucción local de tejido. En general los signos clínicos asociados consistenen: dificultad respiratoria, estornudo, secreciónnasal, hemorragia nasal y la presencia de masas de características variadas en tama o y forma. El diagnóstico se basa en signos clínicos, evaluación citológica e histológica de las lesiones. Esta última es 100% diagnóstica, para el tratamiento se utiliza la extracción quirúrgica combinada con terapia de radiación y quimioterapia.
Músculo Elevador de la Escápula: Caracterización Macroscópica
Mardones Valdivieso,Felipe; Rodríguez Torres,Alberto;
International Journal of Morphology , 2006, DOI: 10.4067/S0717-95022006000300021
Abstract: recent surgical techniques and applications have prompted a thorough anatomical study of the levator scapulae muscle. however, there are still questions regarding its morphology which are important to consider if it is to be used as a reconstructive tool. in this study, 11 human corpses were used (8 males and 3 females), with an average age of 70 years. we dissected in a step-wise manner both sides of 9 cervical and scapular regions, and in 2 cases, only one side. different macroscopic features were analyzed such as: configuration, location, muscle origins and insertions, direct relationships and variations. the muscle was located in the posterior and lateral cervical as well as scapular regions. it resembles a cinch, as it originates from various muscular fascicles and inserts as a common muscular mass. we observed an average of 3.95 (s.d ±0.85) fascicles per muscle, with total lengths in the range between 14.9 c.m. to 18.3 c.m. the fascicles originated from tendons from the cervical vertebrae, with an average of 3.9 (s.d ±0.78) per muscle. distally, the muscle inserted in various points of the scapulae, as well as the fasciae of the serratus anterior muscle. just before its insertion, we also observed the splitting of the muscle into 2 flaps. several vascular, nervous, muscular and lymphatic elements in the cervical and scapular regions were closely related to the levator scapulae muscle. also, anatomical variations were observed regarding the muscle′s origins, muscle fibers and insertions. the developmental events of the muscle are useful to understand some of the macroscopic observations. although some of its morphologic features discourage its use (close relationships, variations), others (length of fascicles and location) enlight it as a good alternative in the reconstructive surgery of the head and neck
Músculo Elevador de la Escápula: Irrigación e Inervación
Mardones Valdivieso,Felipe; Rodríguez Torres,Alberto;
International Journal of Morphology , 2006, DOI: 10.4067/S0717-95022006000400012
Abstract: the use of muscular flaps as a reconstructive tool requires a thorough anatomical knowledge of its blood supply and innervation. although surgical applications of the levator scapulae muscle have contributed to this matter, there are still questions regarding these morphologic features. in this study, 11 human corpses were used (8 males and 3 females), with an average age of 70 years. in 7 of these, an arterial repletion was performed prior to dissection. the latter was done in a step-wise manner in both sides of 9 cervical and scapular regions and in 2 cases, only one side. several aspects of the arterial blood supply and innervation of the muscle were analyzed. we identified 4 possible sources for arterial irrigation: vertebral (v), ascending (ac) and transverse cervical (tc) and dorsal scapular (de). overall, the blood supply occurred as a combination of the above, with tc and de providing the dominant pedicles in most cases. differences were noted in the effective muscular irrigation between the arteries, wich was 100% for v, 80% for ac, 85% for tc and 55% for de. regarding the location of the vascular pedicles, v irrigated the muscle origins, ac irrigated the upper segment, whereas tc and de irrigated the middle and lower muscle segments. based on the mathes and nahai classification, the majority had a type v irrigation pattern. in most cases, the innervation came from the third and fourth spinal cervical nerve (c3 and c4), although the fifth spinal cervical nerve (c5) also participated through the dorsal scapular nerve. the motor points for c3 and c4 were located in the upper segment of the muscle, whereas for c5 it was located in the lower segment. due to its generous and heterogeneous arterial supply and segmentary innervation, the muscle is a good alternative to consider if it is to be used as a reconstructive flap
El proceso de innovación en el sector de alojamiento turístico Mexicano
Rodríguez Torres,Federico; Brown Grossman,Flor;
Estudios y perspectivas en turismo , 2012,
Abstract: the process of innovation in tourism service facilities has been poorly analyzed. this research proposes a conceptualization of this process from the evolutionary view of the firm, and three indicators for empirical assessment. in order to analyze the characteristics of business strategies, examines the relationship between market structure and innovation activity in enterprises of tourist accommodation and the probability of occurrence of the innovation process successfully. this methodological approach is a tool to study and evaluate policy proposals that foster innovation in the sector.
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