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Search Results: 1 - 10 of 32251 matches for " Michel; Rodríguez-Loredo "
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Quebrada de los burros: Los primeros pescadores del litoral pacífico en el extremo sur peruano
Lavallée,Danièle; Julien,Michèle; Béarez,Philippe; Bola?os,Aldo; Carré,Matthieu; Chevalier,Alexandre; Delabarde,Tania; Fontugne,Michel; Rodríguez-Loredo,Cecilia; Klaric,Laurent; Usselmann,Pierre; Vanhaeren,Marian;
Chungará (Arica) , 2011, DOI: 10.4067/S0717-73562011000300002
Abstract: research works at quebrada de los burros evidenced an archaic settlement on the littoral of tacna (peru). this campsite of fishermen and shell-gatherers (qlb) has been occupied during early and middle holocene, between 10,000 and 6,000 bp. broad horizontal excavations revealed six successive occupation levels, with living floor layouts, hearths, specialized activity areas and accumulations of food waste of marine origin mixed with bones of terrestrial fauna. as a whole, these remains indicate that, since the beginning, the inhabitants relied intensively on ocean resources but they also exploited the lomas. lithic tools and bone instruments attest a sophisticated equipment for fishing, gathering and hunting. two phases of occupation were characterized, the first during early holocene (ca. 10,000 to 7,000 bp), the second during middle holocene (ca. 7,000 to 6,000 bp). the analyses suggest, for the first phase, a succession of short occupations and possible contacts with high lands and, on the contrary, a more intensive occupation, nearly all the year round, for the second, during which raw lithic materials came from nearby areas. a close relation with chilean sites chinchorro is confirmed.
Filigranas y contramarcas de papel en los documentos de la Junta de Temporalidades (1767-1785)
De Loredo, Carolina,Rodríguez, María Gabriela
Anuario de la Escuela de Historia (Virtual) , 2010,
Abstract: Este trabajo tiene por objeto el estudio y análisis diplomático de las filigranas o marcas de agua y contramarcas de papel, teniendo en cuenta el valor diplomático que presentan las mismas. Estas se hallan impresas en las hojas de papel encontradas en los documentos de la Junta de Temporalidades de Córdoba redactados entre los a os de 1767 y 1785. Nuestro interés radica no sólo por ser éstas uno de los componentes externos que hacen al soporte físico de la escritura, sino que constituyen además uno de los rasgos cruciales para determinar el principio de procedencia y autenticidad documental, siendo estos uno de los objetos principales de análisis de la Diplomática. Utilizaremos como base de este trabajo las filigranas papeleras que se encuentran en la documentación de Temporalidades del A.H.P.C, A.G.H.U.N.C y Fondo Documental Mons. Pablo Cabrera (ex Instituto Americanista) con el fin de identificarlas según sus motivos, formas, dibujos y figuras; y poder investigar a través de ellas, qué procedencia tenía el papel que circulaba en esta parte de las Indias durante el siglo XVIII.
Polyurethane as substrate for fungal strains  [PDF]
Araceli Loredo-Trevi?o, Gilberto García, Abraham Velasco-Téllez, Raúl Rodríguez-Herrera, Cristóbal N. Aguilar
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.22009
Abstract: Polyurethane is a versatile plastic with several industrial applications in the modern life, but it is considered as a very recalcitrant material. Biodegradation of this plastic has been poorly explored, and most of the studies that have been published focus on bacterial enzymes. In this work, some fungi with the capacity of growing with polyurethane foam as nutrient source were isolated from sands contaminated with this plastic and from DIA/UAdeC collection, testing their ability to grow on polyurethane as sole carbon and nitrogen sources and their enzymatic activities were determined in specific media as well as their invasion capacity on polyurethane agar plates. 22 fungal strains demonstrated their capacity of growing on polyurethane. Among the enzymatic activities evaluate, the most common was the urease activity (95% of the strains).Protease, esterase and laccase activities were present in 86%, 50% and 36% respectively. The great ability of the isolated fungal strains to use polyurethane foam as nutrient opens an important opportunity to study at detail the biodegradation of this plastic, with clear implications in cell biology and environmental technology.
Abuse, exclusion and intolerance to being female
Elisa Bertha Velázquez Rodríguez,Silvia Padilla Loredo,María Luisa Quintero Soto
Medwave , 2012,
Abstract: The problem of abuse, exclusion and intolerance to women is a consequence of practices of domination pervasive in contemporary societies. This problem is manifested in the systematic harassment to women's bodies, to her thoughts and personal lifestyles, which constrains her personal dignity and violates her basic human rights. The approach to this analysis is based on the documentary method and is part of an investigation of health and gender issues in the collegiate body Gender and Sustainable Development in the Autonomous University of Mexico State.
Caracterización de las Diatomitas de Río Seco (Piura, Perú)
Rodríguez Lichtenheldt, J.,Loredo Pérez, J.,Felipe Verdeja, L.,García Iglesias, J.
Boletín de la Sociedad Espa?ola de Cerámica y Vidrio , 1998,
Abstract: The occurrence of diatomites on the area of Rio Seco (Piura, Peru), has led the authors to study their physical, chemical and mineralogical properties with the aim to determinate their principal uses and applications. Conventional methods were applied besides of optical and electronical microscopy, difraction of X rays and thermal differential and gravimetric analysis. It is a medium quality material because of their silica and alumina contents, then the applications should be limited to fabrication of puzzolanic and ceramic materials for construction. La existencia de diatomita en la zona de Río Seco (Piura, Perú), ha llevado a los autores a realizar un estudio de sus propiedades físicas, químicas y mineralógicas, con el objeto de determinar sus principales usos y aplicaciones. Para ello se han utilizado las técnicas de análisis convencional, así como microscopia óptica y electrónica, difracción de rayos X y análisis térmico diferencial y gravimétrico. Tratándose de un material de calidad media, por los contenidos en sílice y alúmina que presenta, su aplicación quedaría restringida a la fabricación de materiales puzolánicos y cerámicos para la construcción.
Mitigación del impacto ambiental del polvo atmosférico a través de Prosopis laevigata y Schinus molle, San Luis Potosí, México
Alcalá,Jorge; Rodríguez,Juan C.; Tiscare?o,Miguel á.; Hernández,Alejandra; Tapia,J. Jesús; Loredo,Catarina; Villase?or,Elena;
Multequina , 2011,
Abstract: in ecological systems the vegetation, by means of its capacity and potential of bioindication, is a viable element to assess the environmental pollution. in order to determine the capacity of atmospheric dust retention in vegetative species, it was developed a study considering the species of mesquite (prosopis leavigata) and pirul (schinus molle) in the municipalities of soledad de graciano sánchez and san luis potosí, determining an ecological corridor of 35.5 km, where the distribution of a rural / urban area converge. this section was divided into five dominant land use: farming, rural residential, trade and services, urban residential and mining. samples were taken from leaf material of these species in 30 points. the sampling was carried out during 2009-2010, considering summer, autumn, winter and spring seasons. a general linear model was designed, considering an α ≤ 0.05 for the possible effect of site, species and season, as well as their possible interactions with the retention of particulate matter sediments (pms). it was demonstrated that the site (p = 0.005), season (p = 0.000) and species (p = .039), as well as the interactions between season-species (p = 0.000) and site-season-species (p = 0.006) were significant. the site that best explains the effect was the area of trade and service, with an average of 0.1196 ± 0.016 (g/kg dry matter). the season with more effect was the 2010 spring with an average of 0.138 ± 0.014 (g/kg dry matter). in the case of the species, the one that had more effect was the mesquite, with an average of 0.097 ± 0.010 (g/kg dry matter). with the results obtained it we identified that the immersed dynamic in this ecological corridor, as well as the seasonal and land use variants, affect the response of species in the retention of particulate matter sediments, asserting the bioindicative capacity for future studies.
Concentraciones de Fe, Mn y Mg en material foliar de cinco especies arbóreas indicadoras de la contaminación urbana en la ciudad de Chihuahua, México
Alcalá,Jorge; Sosa,M.; Moreno,M.; Rodríguez,J. C.; Loredo,C.; Lara,J. L.; Tapia,J.;
Multequina , 2009,
Abstract: the green structure in the cities allows us to make leaf elemental analyses which allow us to relate its mineral content with the urban environmental pollution. the study was developed in the city of chihuahua to determine the capacity of concentration of fe, mn and mg in five tree species. the leaf material of 75 trees was collected during the autumn, spring and summer seasons. the sampling sites were established according to the use of soil in commercial and services area, mixed industry, heavy industry, low and middle class residential area. the mineral concentration in the leafs was done applying the icp technique described as optical spectrometry inductively coupled plasma. interactions between the species, site of land use and season were tested with a general linear analysis with respect to concentrations of each element. the most relevant results show that the cypress (cupressus arizonica) maintained in autumn and spring the highest fe concentrations averaging, 999 mg kg-1 and 789.5±117.2 mg kg-1 respectively. this level surpassed the normal concentration that oscillates from 101 to 200 mg kg-1. with respect to mn, the autumn season concentrated the highest quantity with 89.45±7.5 mg kg-1 and the sycamore (platanus occidentalis) concentrated the highest quantity with 94.14±9.7 mg kg-1 surpassing the normal limits of concentration that oscillates in 26 to 60 mg kg-1. this article provides information to be considered in the strategies of mitigation of the environmental problem of the city of chihuahua.
A review of problem drinking in young Mexicans and possible correlations with gender-related factors
María Luisa Quintero Soto,Silvia Padilla Loredo,Elisa Bertha Velázquez Rodríguez,Gabriela Mandujano Juárez
Medwave , 2012,
Abstract: Increased alcohol consumption in the Mexican population has lead to serious problems around this addiction. The age of onset of alcohol intake is occurring at younger ages increasingly and first contact with alcohol tends to occur at the beginning of adolescence, a period of life fraught with conflicts. In some cases, the teenager will seek evasion or refuge in drinking, or social acceptance from peers and peer groups. In this critical phase, the individual is trying to forge his or her own identity and tends to rebel against figures of authority. All of this leads to a variety of behaviors that many times disregard possible consequences on oneself, one’s family and one’s community. By adopting a gender perspective, this article attempts to provide some insight as to how men and women develop problem-drinking, factors that may bear an effect on its occurrence, as well as to highlight some actions points that may help to solve and prevent this adverse problem.
Linfoma de Burkitt
Sierra Arego,Fernando; López Rodríguez,Carlos Michel;
Revista Cubana de Cirug?-a , 2012,
Abstract: the burkitt lymphoma is a type of non-hodgkin lymphoma infrequent in cuba since it is endemic of central africa. the diagnosis of one in our country always is significant, thus it is important to know it.
Linfoma de Burkitt Burkitt lymphoma
Fernando Sierra Arego,Carlos Michel López Rodríguez
Revista Cubana de Cirugía , 2012,
Abstract: El linfoma de Burkitt es un tipo de linfoma no Hodgkin, no frecuente en Cuba, pues es endémico de áfrica Central. Diagnosticar uno en nuestro país siempre es significativo, por lo que conocerlo es importante. The Burkitt lymphoma is a type of non-Hodgkin lymphoma infrequent in Cuba since it is endemic of Central Africa. The diagnosis of one in our country always is significant, thus it is important to know it.
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