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Search Results: 1 - 10 of 125373 matches for " Pedro Cerme?o "
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Phytoplankton Biogeography and Community Stability in the Ocean
Pedro Cermeo,Colomban de Vargas,Fátima Abrantes,Paul G. Falkowski
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0010037
Abstract: Despite enormous environmental variability linked to glacial/interglacial climates of the Pleistocene, we have recently shown that marine diatom communities evolved slowly through gradual changes over the past 1.5 million years. Identifying the causes of this ecological stability is key for understanding the mechanisms that control the tempo and mode of community evolution.
Elementos para una estrategia de desarrollo industrial en el Perú
Rodolfo Cermeo
Revista Economía , 1989,
Abstract: "El artículo no presenta resumen"
El concepto de Espa a en Didáctica de las Ciencias Sociales
Cermeo Aparicio, Javier
Arbor : Ciencia, Pensamiento y Cultura , 2002,
Abstract: Not available Son numerosos los estudios sobre la ense anza de la Historia en los ss. XIX y XX, a partir de los libros de texto utilizados por los alumnos de Primaria y de Secundaria, pero es necesario también realizar estudios parciales sobre el aprendizaje de algunos conceptos clave, como el concepto de Espa a. Frente a la idea de Espa a dominante desde comienzos del s. XIX, otras ideas han tardado en imponerse o no lo han conseguido nunca del todo, como, por ejemplo, la de la Institución Libre de Ense anza y la de Menéndez Pelayo, Ningún concepto de Espa a ense ado en nuestras Escuelas, Institutos y Colegios alcanzó nunca un consenso duradero y estable, lo cual puede ser considerado como un fracaso histórico de la Escuela. Algo semejante sucede en la actualidad, y la consecuencia es el debilitamiento del sentimiento patriótico entre los espa oles. Por eso, hoy más que nunca, en nuestro sistema educativo es necesario formular un concepto de Espa a que pueda servir a los espa oles del ma ana para cimentar los necesarios lazos afectivos con la patria común de todos ellos. Si la Escuela no lo hace, otros, con diferentes propósitos, lo harán.
Resource Supply Overrides Temperature as a Controlling Factor of Marine Phytoplankton Growth
Emilio Mara?ón, Pedro Cermeo, María Huete-Ortega, Daffne C. López-Sandoval, Beatriz Mouri?o-Carballido, Tamara Rodríguez-Ramos
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0099312
Abstract: The universal temperature dependence of metabolic rates has been used to predict how ocean biology will respond to ocean warming. Determining the temperature sensitivity of phytoplankton metabolism and growth is of special importance because this group of organisms is responsible for nearly half of global primary production, sustains most marine food webs, and contributes to regulate the exchange of CO2 between the ocean and the atmosphere. Phytoplankton growth rates increase with temperature under optimal growth conditions in the laboratory, but it is unclear whether the same degree of temperature dependence exists in nature, where resources are often limiting. Here we use concurrent measurements of phytoplankton biomass and carbon fixation rates in polar, temperate and tropical regions to determine the role of temperature and resource supply in controlling the large-scale variability of in situ metabolic rates. We identify a biogeographic pattern in phytoplankton metabolic rates, which increase from the oligotrophic subtropical gyres to temperate regions and then coastal waters. Variability in phytoplankton growth is driven by changes in resource supply and appears to be independent of seawater temperature. The lack of temperature sensitivity of realized phytoplankton growth is consistent with the limited applicability of Arrhenius enzymatic kinetics when substrate concentrations are low. Our results suggest that, due to widespread resource limitation in the ocean, the direct effect of sea surface warming upon phytoplankton growth and productivity may be smaller than anticipated.
Sistemic mycosis associated to tuberculosis in Bolivar state, Venezuela
V. Cermeo,Julmery J; V. Cermeo,Julman R;
Kasmera , 2008,
Abstract: the frequency and clinical characteristics of endemic systemic mycosis associated with tuberculosis were determined in bolívar state. clinical case records with confirmed diagnoses of systemic mycosis and tuberculosis were reviewed for a 5-year period. seven cases of systemic mycoses endemic to the region were detected: paracoccidioidomycosis and histoplasmosis, associated with tuberculosis. all patients came from bolivar state; only one was feminine and no one was seropositive for the human immunodeficiency virus. all presented pulmonary compromise, mostly symptomatic, accompanied by weight loss (6 of 7). in all cases, alterations appeared on the radiological study of the thorax, mainly diffuse bilateral alveolar compromise. in 6 of the 7 patients, acid-resistant bacilli were observed in sputum samples. the mycosis most frequently associated with tuberculosis was paracoccidioidomycosis (6 of 7); the other associated mycosis was histoplasmosis (1 of 7). all patients received antimycotic and 4-drug anti-tuberculosis treatments and all of them improved. the association of endemic systemic mycosis with tuberculosis is not unusual in bolivar state and therefore, the association of these infections should be systematically investigated.
Leishmaniosis visceral (1942-2006) y seroprevalencia en dos comunidades del estado Bolívar, Venezuela
Cermeo V,Julman R; Cermeo V,Julmery J;
Revista de la Sociedad Venezolana de Microbiología , 2009,
Abstract: visceral leishmaniasis (vl) is a systemic infectious disease produced by protozoa of the leishmania donovani complex, which can be fatal if not treated. it basically affects man and canine species. the dog is an important reservoir and is responsible for the endemic/ epidemic nature of the disease. the purpose of this study was to determine the human visceral leishmaniasis casuistic in bolivar state, venezuela, since the occurrence of the first case until 2006, and determine human and canine vl seroprevalence in two populations from this state. we revised cases with a confirmed vl diagnosis and bibliography published in this respect; we carried out a survey and determined specific anti vl recombinant protein k39 antibodies in humans and canines from las bombitas and los tanques villages. we registered 54 human and 8 canine vl cases. vl is endemic in bolivar state at most municipalities and affects mainly young persons and children. the occurrence of new cases and the presence of vl seropositive canines at las bombitas and los tanques shows the sporadic and endemic nature of this disease at these bolivar state localities
Aracnoidismo en el Hospital Universitario "Ruíz y Páez", estado Bolívar, Venezuela, y revisión de la literatura
Cermeo,JR; Cermeo,JJ; Carpio,N; Salazar,N;
Revista de la Sociedad Venezolana de Microbiología , 2004,
Abstract: the arachnoidism constitutes the group of clinical manifestations taken place by the bite of spiders. in bolívar state prevalence of accidents caused by spiders bites is unknown. the objective of this study was to determine the prevalence and clinical-epidemic aspects of the arachnoidism in the complejo hospitalario universitario "ruiz y páez", main hospital in bolivar state, venezuela. it was a descriptive and retrospective study. clinical records of the cases of arachnoidism evaluated in the complejo hospitalario universitario "ruiz y páez", during january 1996 to julio 2003, were revised. clinical and epidemiological data were registered. also, it was carried out a revision of the literature. in the period of study, 3 cases of arachnoidism were diagnosed. in ciudad bolivar, arachnoidism is unusual, it is usually light and not complicated; however, the personnel of health should be attentive before eventual serious poisonings in the region.
Caída del ingreso real, recesión del sector moderno y expansión del sector informal: un enfoque microeconómico
Rodolfo Cermeo Bazán
Revista Economía , 1987,
Abstract: El artículo no presenta resumen.
Casuística de cromomicosis en el estado Bolívar (1987-2010) y evaluación de la sensibilidad in vitro de dos aislados de Fonsecaea pedrosoi
Cermeo,Julman R; González,Carelis;
Revista de la Sociedad Venezolana de Microbiología , 2011,
Abstract: the purpose of this study was to determine chromomycosis prevalence during a 23-year period at two reference hospitals of bolivar state. a retrospective study was carried out through the revision of clinical case histories of patients with a chromomycosis diagnosis, registering fourteen cases of this disease. of these cases, 78.6% corresponded to males, most of them agricultural workers from rural areas; 28.6% presented verrucous lesions. the period of evaluation of the lesions varied between 5 months and 35 years. fonsecae pedrosoi was the etiologic agent isolated in three (21.4%) of the four patients whose samples were cultured. sensitivity was evaluated in vitro in only two cases through e-test?, showing resistance to systemic antifungals agents: amphotericine-b, 5-fluorocytosine, ketoconazole, fluconazole and itraconazole. two patients were treated with itraconazol, one of them improved and the other presented co-morbility with eumycotic mycetoma and died. chromomycosis prevalence during the period studied was low (0.6 cases/year); nevertheless, this infection constitutes a health problem for risk populations, mainly agricultural and mining workers at bolivar state who present verrucous lesions with a chronic evolution
Inflación y precios industriales: Perú 1980-1990
Rodolfo Cermeo,Margott De la Cruz
Revista Economía , 1991,
Abstract: El artículo no presenta resumen.
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