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Directory of Open Access Journals Sweden. Se han seleccionado doce recursos naturales y culturales vinculados con la geodiversidad de Icod de los Vinos. Full Text Available The spatial and temporal distribution of volcanic eruptions in the Canarian Archipelago are a consequence of their origin and evolution, in response to hotspot activity.
Therefore, the probability that eruptive phenomena will occur is greater in the western islands Tenerife, La Palma and El Hierro, the closest to the hotspot vertex, where hundreds of eruptions have been localized in the last By contrast, in La Gomera presently in the volcanic repose stage and in the easterly islands of Gran CanariaFuerteventura and Lanzarote the most distant and oldest, in the post-erosive stage of development, few eruptions, if any, have taken place during this period.
Objective data therefore exist that permit the assessment and zonification of eruptive hazards in the archipelago. In this work the assessment of volcanic hazards in the island of Tenerife is presented, whichare concentrated in the volcanic system formed by the central edifice of Mt. Teide and the Northwest Rift. Water consumption by humans leads to the possible incorporation into the body of existing radionuclides in it and can cause undesirable effects on human health.
To avoid or reduce them, various agencies have established limits for the concentration of radioactive substances in the water so that it can be used for human consumption. Full Text Available Teide volcano, the highest volcano on earth 3, m a. Its most recent eruptive activity last 20 Ka is associated with the very active NW branch of the ” triple rift system of the island. Most of the eruptions of Tenerife during the past 20 Ka have occurred along these volcanic features, frequently in the production of extensive mafic and felsic lava flows, many of which reached the coast, crossing what is now one of the most densely populated areas of Tenerife and of any oceanic island in the world.
However, despite numerous previous studies, very important basic geological information is still lacking, in particular dating of these flows to construct a geochronological framework for the evolution of the Teide-NW rift system, and a scientifically based, much needed volcanic hazard assessment.
New carbon- 14 ages, obtained via coupled mass spectrometry other in progress, provide important time constraints on the evoliition of Teide’s volcanic system, the frequency and distribution of its eruptions, and associated volcanic hazards.
Although the volcanic activity during the past 20 Ka involved at least 7 voluminous phonolitic flank vents in the northem, more unstable slopes of Teide, it took place without any apparent response of the volcano; on the contrary, these eruptions seemed to progressively buttress and enhance the stability of Teide Volcano.
Conversely, the occurrence of these flank eruptions, combined with the Pico Viejo and NW rift eruptions, poses a very high lava-flow risk to the now densely populated areas in north and west Tenerife, which have been almost entirely resurfaced during the past 20, years.
Abejera centro alto, 5. Abejera centro bajo, 4. Full Text Available In this work, several morphological aspects of volcanic ash grains from southern Tenerife are studied by S. Important variations in vesiculation, fracture and wheathering of pyroclasts are observed.
It’s possible to characterize diferent types of deposits pyroclastic falIs, pyroclastic flow, surges, etc. En este trabajo se estudian mediante M. Deformation in volcanic areas: Active volcanic areas study comprises both, observation of physical changes in the natural media and the interpretation of such changes.
Deformation of the Earth’s surface reflects tectonic, magmatic and hydrothermal processes at depth. In this way, the prediction of volcanic deformation through physical modelling provides a link between the observation and depth interior processes that could be crucial for volcanic hazards assessment. In this work, we develop a numerical model for elastic deformation study. FEM allows to take into account different morphology, structural characteristics and the mechanical heterogeneities of the medium.
Numerical simulations of deformation in Tenerife Canary Islands taking into account different medium hypothesis allow us to conclude that the accuracy of the predictions depends jord how well the natural system is described. New species of Torque Teno miniviruses infecting gorillas and chimpanzees. Methods The Torque teno virus was detected by a nested polymerase chain reaction using a set of oligoprimers for the N22 region.
There was no statistically significant difference between the presence of sanchdz virus and the variables gender, ethnicity and marital status. Conclusion A high prevalence of Torque teno virus was observed in the population studied.
Further studies are paulinoz to elucidate the routes of contamination and the clinical implications of the virus eanchez the healthy population. Currently applied indicator organism systems, such as coliforms, are not fully protective of public health from enteric viruses in water sources.
Waterborne disease outbreaks have occurred in systems that tested negative for coliforms, and positive coliform results do not necessarily correlate with viral risk.
It is widely recognized that bacterial indicators do not co-occur exclusively with infectious viruses, nor do they gosch in the paukinos manner to environmental or engineered stressors. Thus, a more appropriate indicator of health risks from infectious enteric viruses is needed.
Torque teno virus is a small, non-enveloped DNA virus that likely exhibits similar transport characteristics to pathogenic enteric viruses. Torque teno virus is unique among enteric viral pathogens in that it appears to be ubiquitous in boach, elicits seemingly innocuous infections, and does snachez exhibit seasonal fluctuations or epidemic spikes.
Torque teno virus is transmitted primarily via the fecal-oral route and can be assayed using rapid molecular techniques. We hypothesize that Torque teno virus is a more appropriate indicator of viral pathogens in drinking waters than currently used indicator systems based solely on bacteria. To test the hypothesis, a multi-phased research approach is needed. First, a reliable Torque teno virus assay must be developed. A rapid, sensitive, and specific PCR method using established nested primer sets would be most appropriate for routine monitoring of waters.
Because PCR detects both infectious and inactivated virus, an in vitro method to assess infectivity also is needed. Jorvi density and occurrence of Torque teno virus in feces, wastewater, and source waters must be established to define spatial and temporal stability of this potential indicator. Finally, Torque teno virus behavior through drinking water treatment plants must be determined with co-assessment of traditional indicators and enteric viral pathogens to assess whether correlations exist.
El modelo turistico de canarias. The adopted model was contemporary and very similar to the model of other coastal areas of the Spanish State, which were affected by an intense urbanization process. Nowadays, the profile of jrdi tourism that visits us shows the preference of Centre-European citizens sandhez this destiny, predominately German and British.
As regards the tourist offer, the tour-operators policy, the environmental and patrimonial factors, as well as the institutional and managerial support have been definitive.
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The Torque teno virus was detected by a nested polymerase chain reaction using a set of oligoprimers for the N22 region. A high prevalence of Torque teno virus was observed in the population studied.
Blood samples collected from transgender performing high-riskbehavior in Surakarta were tested by serological and molecular assays to detect the presence of HIV infection.
The amplified PCR products were molecularly cloned and subjected to sequence analysis. The molecular characterization revealed that the most prevalent was genogroup 3, followed by genogroup 2 and 1, respectively. Role of Torque teno sus viruses during co-infection with other swine pathogens.
Son virus con genoma circular, de cadena simple, y hasta hoy se han descrito 4 especies diferentes: Global impact of Torque teno virus infection in wild and domesticated animals. Infection with Torque teno viruses TTVs is not restricted to humans. Different domestic and wild animal species are naturally infected with species-specific TTVs worldwide. Due to the global spread of the infection, it is likely that essentially all animals are naturally infected with species-specific TTVs, and that co-evolution of TTVs with their hosts probably occurred.
Although TTVs are potentially related to many diseases, the evidence of the widespread infection in healthy human and nonhuman hosts raised doubts about their pathogenic potential. Nonetheless, their role as superimposed agents of other diseases or as triggers for impairment of immune surveillance is currently under debate.
The possible contribution of animal TT viruses to interspecies transmission and their role as zoonotic agents are currently topics of discussion.
Torque teno virus infection in male commercial sex workers in Surakarta Indonesia. The molecular epidemiology data of torque teno virus TTV in Indonesia is very rare. This study evaluated edcritos prevalence of TTV in male commercial sex workers, as one of the high risk community for blood borne viruses pathogens in Surakarta, Indonesia.
All blood samples collected from male commercial sex workers in Surakarta in were tested by nested polymerase chain reaction PCR. Furthermore, the molecular characterization revealed that the most prevalent was genogroup 3, followed by genogroup 2 and l, respectively. TTV was detected in male commercial sex workers in Surakarta with high infection rate.
Further investigation about TTV circulation in Indonesian population is needed in order to provide additional information about the genetic variability and TTV epidemiology in Indonesia, especially in the high risk communities. Atmospheric corrosion in Gran Canaria specifically meteorological and pollution conditions.
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Carbon steel, copper, zinc and aluminium samples were exposed in different sizes with known ambient parameters in Gran Canaria Island and atmospheric corrosion was investigated. Weight-loss measurements used to determine corrosion damage were complemented with metallographic and XP S determination in order to characterize the structure and morphology of surface corrosion products.
The ambient aggressiveness could be well evaluated from meteorological and pollution data. All atmospheric corrosion and environmental data were statistically processed for establishing general corrosion damage functions for carbon steel, copper, aluminium and zinc in terms of Gran Canaria extreme meteorological and pollution parameters.
Volcanic and geochemical evolution of the Teno massif, Tenerife, Canary Islands: Large-scale, catastrophic mass wasting is a major process contributing to the dismantling of oceanic intraplate volcanoes.
The Teno massif, located in northwestern Tenerife Canary Islandsis a deeply eroded Miocene shield volcano that was built in four major eruptive phases punctuated High prevalence of co-infection with multiple Torque teno sus virus species in Italian pig herds.
The global prevalence of infection was Torque teno viruses TTVs are a large group of vertebrate-infecting small viruses with circular single-stranded DNA, classified in the Anelloviridae family. Antibody-mediated rejection AMR represents one of the cardinal causes of late allograft loss after kidney transplantation, and there is great need for noninvasive tools improving early diagnosis of this rejection type.
One promising strategy might be the quantification of peripheral blood DNA levels of the highly prevalent and apathogenic Torque Teno virus TTVwhich might mirror the overall level of immunosuppression and thus help determine the risk of alloimmune response.
To assess the association between TTV load in the peripheral blood and AMR, kidney transplant recipients median, 6. In a generalized linear model, higher TTV levels were associated with a decreased risk for AMR after adjustment for potential confounders risk ratio 0. Future studies will have to clarify whether longitudinal assessment of TTV load might predict AMR risk and help guide the type and intensity of immunosuppression to prevent antibody-mediated graft injury.
Detection of human Torque teno virus in the milk of water buffaloes Bubalus bubalis. Forty-four raw milk and 15 serum samples from 44 healthy water buffaloes reared in Caserta, southern Italy, the most important region in Europe for buffalo breeding, were examined to evaluate the presence of Torque teno viruses TTV using molecular tools.
Furthermore, 8 pooled pasteurized milk samples from dairy factories having excellent sanitary conditions and 6 Mozzarella cheese samples were also tested. Four of the cheese samples were commercial Mozzarella cheese; the remaining 2 were prepared with TTV-containing milk.
No TTV were found in serum, pooled pasteurized milk, or Mozzarella cheese samples. The samples of Mozzarella cheese prepared with TTV-containing milk did not show any presence of TTV, which provides evidence that standard methodological procedures to prepare Mozzarella cheese seem to affect viral structure, making this food fit for human consumption. The 7 TTV species from water buffaloes were identified as genotypes corresponding to the tth31 3 casesslesleand NLC 2 cases each human isolates.
Although cross-species infection may occur, detection of TTV DNA in milk but not in serum led us to believe that its presence could be due to human contamination rather than a true infection. Finally, the mode of transmission of TTV has not been determined.