965 resultados para Mutación (Biología)
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The name Cenzaureo rouyi-Cisteuon albidi Costa & Pérez Lilia, invalidly published due to the ommission of the nomenclatural type, is validated here.
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Fourty-two high-rank syntaxa and seven associations of the thallophyte system of syntaxa are either described as new or validated in this paper. Among those, there are the following nine classes: Aspicilietea candidae, Caulerpetea racemosae, Desmococcetea olivacei, Entophysalidetea deustae, Gloeocapsetea sanguineae, Mesotaenietea berggrenii, Naviculetea gregariae, Porpidietea zeoroidis, Roccelletea phycopsis. Eleven orders and ten alliances as well as three associations are described or validated: the Aspicilietalia verruculosae (incl. Aspicilion mashiginensis and Teloschistion contortuplicati), the Caulerpetalia racemosae (incl. Caulerpion racemosae), the Desmococcetalia olivacei (incl. Desmococcion olivacei), the Dirinetalia massiliensis, the Fucetalia vesiculosi (incl. Ascophyllion nodosi), the Gloeocapsetalia sanguineae, the Lecideetalia confluescentis (incl. Lecideion confluescentis), the Mesotaenietalia berggrenii (incl. Mesotaenion berggrenii, Mesotaenietum berggrenii and Chloromonadetum nivalis), the Naviculetalia gregariae (incl. Oscillatorion limosae and Oscillatorietum limosae), the Porpidietalia zeoroidis (incl. Porpidion zeoroidis), and the Roccelletalia fuciformis (incl. Paralecanographion grumulosae). Further, five orders, seven alliances and four associations, classified in known classes, were described as well. These include: the Bacidinetalia phacodis, the Agonimion octosporae and the Dendrographetalia decolorantis (all in the Arthonio radiatae-Lecidelletea elaeochromae), the Staurothelion solventis (in the Aspicilietea lacustris), the Pediastro duplicis-Scenedesmion quadricaudae and the Pediastro duplicis-Scenedesmetum quadricaudae (both in the Asterionelletea formosae), the Peccanion coralloidis and the Peltuletalia euplocae (both in the Collematetea cristati), the Laminarion hyperboreae, the Saccorhizo polyschidi-Laminarietum and the Alario esculenti-Himanthalietum elongatae (all in the Cystoseiretea crinitae), the Delesserietalia sanguinei, the Delesserion sanguinei and the Delesserietum sanguineae (all in the Lithophylletea soluti), as well as the the Rinodino confragosae-Rusavskietalia elegantis and the Rhizocarpo geographici-Rusavskion elegantis (both in the Rhizocarpetea geographici).
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Hyperadrenocorticism is a rare endocrine disease in the cat; it is characterized by elevated blood cortisol level that generates numerous clinical signs including hyperglycemia, polyuria, polydipsia, polyphagia and skin diseases. The average age of onset is around 10 years. This disease usually occurs link with other endocrine disorders such as diabetes mellitus.The disease can be produced by functional alteration of the pituitary gland or the adrenal. A case report, with differential diagnosis and review of the literature, is presented.
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The objective the study was to determine the levels of glucose and triglycerides in seminal plasma of 10 guinea pigs, which were fed for a period of 2 months with a diet containing 10% more ED. The level of glucose found in seminal plasma was 11.59 ± 0.5 mg/dL and triglyceride value was 55.95 ± 3.2 mg/dL, while the motility was 97% on average. We conclude that in guinea pigs the levels both glucose and triglycerides were increased by major level of ED in feed, but the spermatic motility was not.
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The transition from a positivist matrix to an idealistic one in Argentinean academic philosophy can be read as a result of a gradual and problematic pollution. It was, also, heavily traversed by considerations that exceeded the theoretical aspects. Based on the willingness to explore this transit, the article pays attention to one of the episodes of this contamination: how the Revista de Filosofía reads Croce and Gentile’s philosophy. Observing there some possibility of dialogue between positivist assumptions, with which the journal takes a position, and the idealism the article analyze how this dialogue and its limits were given from a political consideration. If the idealism was condemned, it is centrally owed to its performance during the first years of the government of Mussolini. If, meanwhile, it was some to rescue of that philosophy, it was that it contributed to think the revolutionary change.
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La redacción de las directrices y los procedimientos administrativos que hacen virtualmente posible la inmigración, contribuye a construir no sólo los itinerarios sino también el imaginario social sobre la alteridad. El principal objetivo del artículo es poner de relieve –mediante el análisis discursivo de las Hojas informativas publicadas en la WEB del Ministerio de Empleo y Seguridad Social- cómo la construcción social del emigrante/inmigrante y el proyecto migratorio topan con unas representaciones y envites, instituidos y refrendados en y por la propia formulación de la reglamentación, pero no del todo explícitos. Entendiendo el texto como una acción que genera otras acciones, se examinan las consecuencias que tiene sobre la practica social de los inmigrantes. En suma, se trata de vislumbrar los elementos (terminología, fórmulas, esquemas y prácticas inducidas) que van constituyendo al inmigrante como agente social subordinado a micro-procesos y relaciones que se le escapan en gran parte (en contra de las apariencias que parecieran sugerir lo contrario) y van marcando su propia capacidad de acción. En conclusión y retomando la distinción entre principio de diferencia y principio de indiferencia sugerida por Foucault, se muestra que mientras el primero rige las clausulas generales, el segundo articula las específicas.
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El concepto del Yo en el pensamiento de José Ortega y Gasset aparece en repetidas ocasiones a lo largo de su obra, abordado desde diferentes perspectivas y entreverado con reflexiones intelectuales de todo tipo: psicológicas, sociológicas, artísticas, históricas, etc. Sin embargo, el enfoque de este escrito se acota a la importante relación epistemológica entre su raciovitalismo y su visión sobre la intimidad personal, centro y origen del desarrollo del Yo humano. Gracias a la riqueza de esta puede el Yo desarrollar su vocación personal hacia la autenticidad a la que está llamado, salvando de esta manera la incertidumbre, el drama y el destino al que se enfrenta a la hora de vivir la propia circunstancia.
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This paper explores the problem of the synthesis between vitalism and rationalism, in contemporary philosophy. With this aim, we compare the intellectual careers of Georges Canguilhem (1904-1995) and José Ortega y Gasset (1883-1955). We contrast their conceptions of philosophy as “hybrid” knowledge, closely related to science, as well as their points of view on Vitalism, anthropology, the technique and the perspectivism. To avoid that comparison is purely abstract and ahistorical, we use the method of the sociology of philosophy. This forces us to locate both paths in their respective philosophical fields and generational units, also according to his social background and professional career.
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In the case of this study about flamenco dance, it is spotlighted how the matter of genders is a recurrent topic and a challenge in terms of creativity. Flamenco is in a perpetual search of a balance between tradition and contemporarily. Circumstance in which it was born, make this search and this constant mutation as part of its essence. When in a performance the representation of man and woman parts are modified according to the “traditional idea”, it brings up existential questions. Flamenco dance, like all the other contemporary forms of dance, reflects its context, contributes to its innovation and interacts with it. It is a social act.
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Bio art, understood as the convergence of the relations between art, biology and technology, constitutes a useful case study to discuss the meaning of interdisciplinarity in the artistic field. This paper explores different discourses around interdisciplinarity in order to challenge certain generic approaches for their ineffectiveness when assessing artistic practices. It is proposed that the analysis of interdisciplinarity must address the singular connections produced in the artistic practice itself, considering the impossibility of reducing the complexity of interdisciplinary dialogues into generic considerations. Taking bioart as a case study, different kinds of relationships between the artist and the lab are identified and analyzed, ranging from the use of the lab as a true atelier and as a resource for materials and techniques, to the rejection of the lab by proposing amateurism as an alternative. estrategias amateur, pasando por su utilización como fuente de técnicas y materiales.
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El paso del tiempo tiene una repercusión inevitable sobre las obras de arte. En el caso del arte contemporáneo muchos de los valores estéticos, culturales o sociales presentes en las mismas, están vinculados a la apariencia y al uso premeditado de la materia. La transformación de la materia tiene una repercusión sobre la intención y el discurso estético, por ello, y ante la imposibilidad de impedir el cambio, se hace necesaria una profunda reflexión sobre el concepto de autenticidad de la obra de arte y sobre el concepto de ruina prematura. Por otro lado, gracias a la figura del artista contemporáneo es posible documentar la producción actual para determinar si la mutación de la materia afectará a lo esencial en las obras. En este sentido, el trabajo ha conseguido concretar, para el caso de varios artistas fundamentales del panorama español, qué aspectos deben, por ser esenciales, permanecer inmutables con el paso del tiempo.
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ABSTRACT BACKGROUND: Acute exposure to high-altitude stimulates free radical formation in lowlanders yet whether this persists during chronic exposure in healthy well-adapted and maladapted highlanders suffering from chronic mountain sickness (CMS) remains to be established. METHODS: Oxidative-nitrosative stress [ascorbate radical (A•-), electron paramagnetic resonance spectroscopy and nitrite (NO2-), ozone-based chemiluminescence] was assessed in venous blood of 25 male highlanders living at 3,600 m with (n = 13, CMS+) and without (n = 12, CMS-) CMS. Twelve age and activity-matched healthy male lowlanders were examined at sea-level and during acute hypoxia. We also measured flow-mediated dilatation (FMD), arterial stiffness (AIx-75) and carotid intima-media thickness (IMT). RESULTS: Compared to normoxic lowlanders, oxidative-nitrosative stress was moderately increased in CMS- (P < 0.05) as indicated by elevated A•- (3,191 ± 457 vs. 2,640 ± 445 arbitrary units (AU)] and lower NO2- (206 ± 55 vs. 420 ± 128 nmol/L) whereas vascular function remained preserved. This was comparable to that observed during acute hypoxia in lowlanders in whom vascular dysfunction is typically observed. In contrast, this response was markedly exaggerated in CMS+ (A•-: 3,765 ± 429 AU and NO2- : 148 ± 50 nmol/L) compared to both CMS- and lowlanders (P < 0.05). This was associated with systemic vascular dysfunction as indicated by lower (P < 0.05 vs. CMS-) FMD (4.2 ± 0.7 vs. 7.6 ± 1.7 %) and increased AIx-75 (23 ± 8 vs. 12 ± 7 %) and carotid IMT (714 ± 127 vs. 588 ± 94 µM). CONCLUSIONS: Healthy highlanders display a moderate sustained elevation in oxidative-nitrosative stress that unlike the equivalent increase evoked by acute hypoxia in healthy lowlanders, failed to affect vascular function. Its more marked elevation in patients with CMS may contribute to systemic vascular dysfunction.Clinical Trials Gov Registration # NCT011827921Neurovascular Research Laboratory, Faculty of Health, Science and Sport, University of Glamorgan, Wales, UK;2Sondes Moléculaires en Biologie et Stress Oxydant, Institut de Chimie Radicalaire, CNRS UMR 7273, Aix-Marseille University, France;3Department of Cardiology, University Hospital of Bern, Bern, Switzerland;4Institute of Clinical Physiology, CNR, Pisa, Italy;5Instituto Bolivano de Biologia de Altura, La Paz, Bolivia;6Centre for Clinical and Population Sciences, Queen's University Belfast, Belfast, Northern Ireland,7Botnar Center for Clinical Research, Hirslanden Group, Lausanne, Switzerland;8Facultad de Ciencias, Departamento de Biología, Universidad de Tarapacá, Arica, Chile and9Department of Internal Medicine, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland*Drs Bailey, Rimoldi, Scherrer and Sartori contributed equally to this workCorrespondence: Damian Miles Bailey, Neurovascular Research Laboratory, Faculty of Health, Science and Sport, University of Glamorgan, UK CF37 4AT email: dbailey1@glam.ac.uk.
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Tesina elaborada para obtener el MPhil en la Universidad de Cambridge, Inglaterra, 1987
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Datos sobre recuentos vertebrales, branquiales y radios de las aletas dorsal y anal de las anchovetas peruanas. Como las variaciones del numero de vértebras son por lo general más usadas para la diferenciación de poblaciones de peces, en esta primera contribución se presenta el análisis estadísticos del número de vertebras en diferentes localidades, dejando los otros datos para un trabajo futuro.
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Describe las acciones desplegadas por el crucero del B.A.P. Unanue, correspondiente al invierno de 1967, en el que se investigó el área entre el 04º00´s y 17º35´S ocupándose de 168 estaciones de rutina distribuidas en 20 perfiles. Durante todo el recorrido se investigó la presencia de cardúmenes de peces por medio de los equipos de ecosonda y radar y se realizaron observaciones sobre presencia de aves y mamíferos marinos.