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Search Results: 1 - 10 of 556286 matches for " José Antonio López-Sáez "
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Análisis palinológico del túmulo de Los Tiesos (Mediana de Voltoya, ávila).
López-Sáez, José Antonio
Munibe Antropologia-Arkeologia , 2011,
Abstract: El análisis palinológico del túmulo de Los Tiesos demuestra la existencia, durante el III milenio cal. BC, de un paisaje de dehesa con claro origen antropozoógeno sin evidencias de agricultura. Estos hechos permiten interpretar el monumento como un lugar de paso del ganado trasterminante en el marco cronocultural considerado.
Estudio palinológico de los sedimentos arqueológicos del yacimiento del Llanete de los Moros (Córdoba)
López García, Pilar,López-Sáez, José Antonio
Trabajos de Prehistoria , 1994,
Abstract: This paper present a pollen analysis from excavation at the Bronze Age site of Llanete de los Moros, with special reference to Vitis and Olea, and the presence of anthropic plants enabling the definition of distinct periods of the Holocene. The action of man seems to be present throughout the diagram. Se presentan los resultados del análisis paleopalinológico llevado a cabo en el yacimiento arqueológico del Llanete de los Moros, con una cronología arqueológica, encuadrable en la Edad del Bronce, y que lo sitúa climáticamente en el Subboreal-Subatlántico. Se pone de manifiesto una amplia representación de especies nitrófilas así como una cobertura arbórea poco manifiesta. Se comenta la presencia de Vitis y Olea.
Paleoenvironment during the upper Pleistocene at Vaucluse: palynological analysis of the lower layers of l′abri de la Combette (Bonnieux, Vaucluse, France)
López-Sáez, José Antonio,Texier, Pierre Jean,Thi Mai, Bui
Trabajos de Prehistoria , 1998,
Abstract: The palynological study of the La Combette rockshelter gives us information on the evolution of the vegetation surrounding the rock shelter area during the Upper Pleistocene (isotopic stage 3). Although widely dominated by Pinus sylvestris t. , mediterranean species are also present in the different climatic phases revealed by the catalysis. This confirms the refuge character of the area. [es] Paleoambiente durante el Pleistoceno Superior en Vaucluse: análisis palinológico de los niveles inferiores del abrigo de la Combette (Bonnieux, Vaucluse, Francia). El estudio palinológico del Abrigo de La Combette nos informa sobre la evolución seguida por la vegetación en el entorno del yacimiento durante el Pleistoceno Superior, Würm antiguo (inicio del estadio isotópico 3). Se ponen de manifiesto diversas fases climáticas caracterizadas, en general, por el dominio de Pinus sylvestris t. así como por la notable presencia de especies mediterráneas. Se constata el carácter de refugio de la zona estudiada. [fr] L'étude palynologique de l'abri de La Combette nous informe sur l'évolution de la végétation autour du site pendant le Pléistocène supérieur, au Würm ancien (début du stade isotopique 3). Les différentes phases climatiques mises en évidence sont caractérisées par la dominance du pin sylvestre et la présence notable d'espèces méditerranéennes. On constate le caractère refuge du site.
Retrospectiva del bosque de pino y encino de la Sierra Madre Occidental, Sonora, noroeste de México, hace 1000 a?os
Ortega-Rosas, Carmen Isela;Pe?alba, M. Cristina;López-Sáez, José Antonio;Van Devender, Thomas R.;
Acta botánica mexicana , 2008,
Abstract: the ciénega de camilo is a sphagnum palustre seep in a canyon in dense pine-oak forest with four species of pine and seven of oak in the sierra madre occidental of eastern sonora, mexico. analyses of pollen and non-pollen palynomorphs in two sediment cores show that pine-oak forest has been at the site during the last thousand years. when sedimentation began about 1000 years ago (1058 ±60 and 870 ±70 cal. bp (calibrated years before present)), pine was more abundant than today with an additional species with large pollen grains now present at higher elevation. the abundance and diversity of ferns were higher. non-pollen palynomorphs suggest moister (presence of copepoda), and eu- to mesotrophic conditions at the base, followed by drier conditions (unidentified amerospores, type 55a, zygnemataceae, and pediastrum), leading to the most recent mesotrophic-ombrotrophic environment characterized by pleospora, type 82e, and the sphagnum palustre seep. the inferred wet period at around 1000 cal. bp followed by drier and warmer climates is contemporaneous with the maximum development of the sonoran and chihuahuan desert archeological cultures.
Retrospectiva del bosque de pino y encino de la sierra madre occidental, sonora, noroeste de México, hace 1000 a os
Carmen Isela Ortega-Rosas,M. CrIstIna Pe?alba,José Antonio López-Sáez,Thomas R. Van Devender
Acta botánica mexicana , 2008,
Abstract: La Ciénega de Camilo es un humedal con Sphagnum palustre localizado en un bosque denso de pino y encino con cuatro especies de Pinus y siete de Quercus, en la Sierra Madre Occidental, en la región este de Sonora. Los análisis de polen y palinomorfos no polínicos de dos núcleos de sedimento muestran que el bosque de pino y encino ha existido en el lugar durante el último milenio. Sin embargo, hace alrededor de mil a os (1058 ±60 y 870 ±70 a os cal. BP (a os calibrados antes del presente)), el pino era más abundante que hoy día, y además crecía una especie de pino adicional, posiblemente del grupo de Pinus strobiformis, que hoy prospera a mayores elevaciones, en un clima más fresco y húmedo. Había abundancia y diversidad de helechos. Los palinomorfos no polínicos sugieren condiciones más húmedas (presencia de Copepoda) y eu- a mesotróficas en la base, seguidas por condiciones más secas (amerosporas indiferenciadas, tipo 55A, Zygnemataceae y Pediastrum), conducentes al medio ambiente mesotrófico-ombrotrófico más reciente caracterizado por Pleospora y tipo 82E, que refleja la ciénega de Sphagnum palustre. Se infiere que hubo un período húmedo hace alrededor de 1000 a os (14C BP), contemporáneo con el máximo desarrollo de las culturas arqueológicas de los desiertos Sonorense y Chihuahuense, que fue seguido por un clima progresivamente más seco y cálido.
Metaorganizadores, redes externas y conocimiento en los sectores manufactureros espa oles: el papel de las instituciones locales en el distrito industrial del Vinalopó
José Antonio Belso-Martínez,María José López-Sánchez
Economía, sociedad y territorio , 2012,
Abstract: Se analiza la importancia de las instituciones públicas y privadas en las opciones de viabilidad de los distritos industriales manufactureros. Apoyados en el creciente peso de las aportaciones de las teorías de las redes y el capital social, confirmamos el creciente papel de estos metaorganizadores del sistema local como catalizadores y diseminadores de conocimientos procedentes del entorno exterior, coadjutores en la explotación de las oportunidades de negocio o emisores de los conocimientos y saber hacer del distrito industrial hacia el exterior. Para alcanzar este objetivo realizamos un análisis empírico del denominado distrito industrial del Vinalopó.
Role of Angiotensin-(1-7) on Renal Hypertrophy in Streptozotocin-Induced Diabetes Mellitus  [PDF]
Dante Amato, Alma R. Nú?ez-Ortiz, José del Carmen Benítez-Flores, David Segura-Cobos, Pedro López-Sánchez, Beatriz Vázquez-Cruz
Pharmacology & Pharmacy (PP) , 2016, DOI: 10.4236/pp.2016.79046
Abstract:
Participation of angiotensin II in chronic kidney diseases including diabetic nephropathy (DN) has been extensively described. Similarly, several studies support a protective role for angiotensin-(1-7). However, other studies suggest that some of the cellular effects of angiotensin-(1-7) may be deleterious. The objective of this study was to determine the role of exogenous angiotensin-(1-7) on renal hypertrophy development in rats with streptozotocin-induced diabetes. A control group and three groups of rats with streptozotocin-induced diabetes: untreated diabetic rats, diabetic rats treated with captopril, and diabetic rats treated with angiotensin-(1-7), were studied. After two weeks of treatment, the kidneys were removed under anesthesia with pentobarbital. The kidneys were weighed and the renal cortex was separated for analysis of AT1R, TGF-β1, MASR, and ACE2 expression by western blot. Rats in the three groups with diabetes had hyperglycemia, increased food and water consumption, and higher urinary volume than control rats. Treatment with captopril or angiotensin-(1-7) reversed streptozotocin-induced renal hypertrophy, measured by kidney weight, protein/DNA ratio in renal cortex, glomerular area, or proximal tubular cells area, proteinuria, and creatinine clearance reduction. AT1R, TGF-β1, and MAS receptor expression in renal cortex of diabetic rats increased significantly as compared to controls (p < 0.05); treatment with captopril or angiotensin-(1-7) reversed such increments. ACE2 in the renal cortex decreased in diabetic rats, but it was increased after treatment with captopril or angiotensin-(1-7). These findings suggest that exogenous administration of angiotensin-(1-7) may be renoprotective in early stages of diabetes mellitus.
Earliest Known Use of Marine Resources by Neanderthals
Miguel Cortés-Sánchez, Arturo Morales-Mu?iz, María D. Simón-Vallejo, María C. Lozano-Francisco, José L. Vera-Peláez, Clive Finlayson, Joaquín Rodríguez-Vidal, Antonio Delgado-Huertas, Francisco J. Jiménez-Espejo, Francisca Martínez-Ruiz, M. Aranzazu Martínez-Aguirre, Arturo J. Pascual-Granged, M. Mercè Bergadà-Zapata, Juan F. Gibaja-Bao, José A. Riquelme-Cantal, J. Antonio López-Sáez, Marta Rodrigo-Gámiz, Saburo Sakai, Saiko Sugisaki, Geraldine Finlayson, Darren A. Fa, Nuno F. Bicho
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0024026
Abstract: Numerous studies along the northern Mediterranean borderland have documented the use of shellfish by Neanderthals but none of these finds are prior to Marine Isotopic Stage 3 (MIS 3). In this paper we present evidence that gathering and consumption of mollusks can now be traced back to the lowest level of the archaeological sequence at Bajondillo Cave (Málaga, Spain), dated during the MIS 6. The paper describes the taxonomical and taphonomical features of the mollusk assemblages from this level Bj19 and briefly touches upon those retrieved in levels Bj18 (MIS 5) and Bj17 (MIS 4), evidencing a continuity of the shellfishing activity that reaches to MIS 3. This evidence is substantiated on 29 datings through radiocarbon, thermoluminescence and U series methods. Obtained dates and paleoenvironmental records from the cave include isotopic, pollen, lithostratigraphic and sedimentological analyses and they are fully coherent with paleoclimate conditions expected for the different stages. We conclude that described use of shellfish resources by Neanderthals (H. neanderthalensis) in Southern Spain started ~150 ka and were almost contemporaneous to Pinnacle Point (South Africa), when shellfishing is first documented in archaic modern humans.
Tratamiento quirúrgico de las estenosis yuxtaanastomóticas en las fístulas arteriovenosas radiocefálicas de hemodiálisis: Nueva anastomosis proximal
Jiménez-Almonacid,Pedro; Gruss-Vergara,Enrique; Jiménez-Toscano,Marta; Lasala,Manuel; Rueda,José A.; Portolés,José; Tato,Ana; Vega,Laura; López-Sánchez,Paula; Mas,M. Isabel; Quintans,Antonio;
Nefrología (Madrid) , 2012, DOI: 10.3265/Nefrologia.pre2012.Mar.11079
Abstract: introduction: the juxta-anastomotic stenosis is the most frequent cause of dysfunction in radiocephalic fistulas for haemodialysis. this adversity can cause low flow or thrombosis. the appropriate treatment of these lesions is under debate. method: a prospective study was performed from 1998 to 2009. all dysfunctional radiocephalic fistulas due to juxta-anastomotic stenosis were included (n=96). the diagnosis was made by fistulografy in low flow cases and clinical evidence in cases of thrombosis. the repair was performed using a new proximal radiocephalic anastomosis in all cases. patency following surgical intervention was estimated with the kaplan-meier method. results: a total of 96 proximal radiocephalic anastomoses were performed during the study period. mean surveillance time was 57.27 months (95% ci: 47.53-67.02). sixty-six patients were male, and the mean age was 67 years. scheduled surgery was performed in 70.5% of cases and 29.5% were emergency procedures, 92% of which were ambulatory. technical success was achieved in 100% without any complications. mean primary patency at 1, 2, 3, 4, and 5 years was 89.4%, 75%, 70.4%, 65%, and 56%, respectively. additional procedures (n=16) were required in 14 cases (twelve new proximal anastomoses and four cases of arteriovenous graft placement), resulting in mean secondary patency at 1, 2, 3, 4, and 5 years of 93.7%, 92.1%, 89.6%, 87%, and 82.6%, respectively. mean secondary patency of initial dysfunctional radiocephalic fistulas at 1, 2, 3, 4, and 5 years was 95%, 95%, 93.2%, 89.1%, and 86.6%, respectively. conclusions: in our experience the proximal radiocephalic anastomosis can significantly extend fistula functionality in patients with juxta-anastomotic stenosis.
Uraco-cistopexia: nueva técnica de cisto-suspensión asociada al Burch para el tratamiento del cistocele e incontinencia urinaria de esfuerzo, seguimiento a largo plazo
Serrano-Brambila,Eduardo Alonso; Lorenzo-Monterrubio,José Luis; López-Sámano,Virgilio Augusto; Montoya-Martínez,Guillermo; Orozco-Lara,Juan Carlos; Ixquiac-Pineda,Guillermo Antonio;
Archivos Espa?oles de Urología (Ed. impresa) , 2009, DOI: 10.4321/S0004-06142009000100005
Abstract: objectives: to compare long term efficacy and morbidity in patients with stress urinary incontinence treated using burch's colpopexy versus burch's colpopexy plus urachus-cystopexy. methods: retrospective, longitudinal comparative, observational study in 129 patients with stress urinary incontinence (sui) or mixed urinary incontinence (mui). fifty four patients underwent burch's colpopexy (group b) and 75 patients underwent burch's colpopexy and urachus-cystopexy (group b u). these patients completed inclusion criteria from january 1994 to march 2005. the severity of sui was evaluated by means of the number of pads used in 24 hours. cure was defined as patients not using any pad for urinary leakage; improvement, when the number of pads used decreased to one pad a day; and failure when the patients used more than 1 pad in 24 hours. in mui the urge urinary incontinence (uui) component was evaluated separately. results: after 12 months of follow-up, 47 patients of group b and 67 patients of group bu were evaluated analyzing cure/improvement. either one were observed in 74.4% (29/6) and 97% (58/7) respectively (p= 0.001). at 24 months follow up, in 35 patients of group b and 42 of group bu, a rate of 65.7% (22/3) and 97.6% (37/4) was observed respectively (p=0.014). mui was present in 53.7% of group b and 58.6% patients of group bu. an independent analysis was made on urge urinary incontinence (uui) in these patients at 12 months; 53.1 % of group b and 19.4 % of group bu had uui (p= 0.000). at 24 months, 50% of patients of group b and 26.19% of group bu had uui (p= 0.029). de novo uui was present in 19.4% of group b and 5.97% of group bu (p= 0.000) at12 months follow-up, and in 17.64% of patients of group b and 13.95% of group bu (p= 0.005) at 24 months. complications related to urachus-cystopexy presented transoperatively: vesical injury in 3 of the initial cases, solved with bladder closure in two layers and vesical catheter for 7 days approximately. conclusions: burc
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