Normotensive pheochromocytomas have roughly comparable per-operative hemodynamic instability to hypertensive pheochromocytomas and differ markedly from non-pheochromocytoma AIs. It is therefore crucial to identify normotensive pheochromocytomas among AIs when surgery is scheduled and to apply the standard of care for pheochromocytoma anesthesia.

No abstract

We simultaneously measured bacterial production (BP), bacterial respiration (BR), alkaline phosphatase activity (phos) and ectoaminopeptidase activity (prot) in relation to biogeochemical parameters, nutritive resources and in situ temperature over a 1-year survey at the long-term observatory the SOLEMIO station (Marseille bay, NW Mediterranean Sea). Despite its proximity to the coast, oligotrophic conditions prevailed at this station (yearly mean of Chl a = 0.43 μg dm(-3), NO3 = 0.55 μmol dm(-3) and PO4 = 0.04 μmol dm(-3)). Episodic meteorological events (dominant winds, inputs from the Rhone River) induced rapid oscillations (within 15 days) in temperature and sometimes salinity that resulted in rapid changes in phytoplankton succession and a high variability in C/P ratios within the particulate and dissolved organic matter. Throughout the year, BP ranged from 0.01 to 0.82 μg C dm-(3) h-(1) and bacterial growth efficiency varied from 1 to 39%, with higher values in summer. Enrichment experiments showed that BP was limited most of the year by phosphorus availability (except in winter). A significant positive correlation was found between in situ temperature, BP, BR and phos. Finally, we found that temperature and phosphate availability were the main factors driving heterotrophic bacterial activity and thus play a fundamental role in carbon fluxes within the marine ecosystem.

Between 1996 and 2000, 79 cruises have been achieved following always the same transect between Marseilles and the Rhone river's mouth. While cruising, salinity, temperature and fluorescence of surface waters (1.5 m) were recorded every minute, in association with precise GPS position. The whole set of data (i.e. 128 measured points per cruise) constitutes the Sorcom series whose synthetic results are presented here. Despite the high spatial and temporal variability encountered between two successive cruises, the regularity and duration of the sampling strategy permitted to define coherent spatial zonation and temporal evolutions. In the Cape Couronne vicinity the dynamic of the eastern extension of the dilution plume clearly changes. Westward, waters are frequently under its influence, but more sporadically to the east, with a less pronounced gradient. In few cases, salinity lowering has been measured up to the gulf of Marseilles. In these two areas, which can be divided in two sub zones, seasonal evolutions are different. In the eastern area (Cape Couronne-Marseilles), the classical rhythm prevailing over marine waters is observed but with earlier phytoplanktonic bloom than usually reported. In the western part, and as getting closer to the Rhone river mouth, a weaker seasonal variability is observed for the phytoplanktonic biomass then salinity and temperature differences remain high. The better knowledge of the eastern dilution plume is of important socio-economical concern due to the numerous population living on this coast and the presence of pollutants in the river waters.

No abstract

No abstract

INTRODUCCIÓNLa utilización de terapias combinadas de varios fármacos antirretrovirales ha sido clave para conseguir remisiones importantes de la replicación del virus de la inmunodeficiencia humana (VIH) y para minimizar la aparición de resistencias frente al mismo (1,2). La incorporación desde finales de 1996 de los denominados regímenes de alta eficacia ha condicionado la historia natural de la infección, reduciendo la mortalidad hasta en un 90% (3,4). Los innegables avances en este ámbito se han visto condicionados por la incapacidad del paciente para mantener una óptima adherencia (5,6) y por la 23 [0212-7199 (2003) RESUMENFundamento: Comparar la evolución temporal de los parámetros de carga viral (CV) y CD4 en dos cohortes de pacientes VIH tratados con dos regímenes clásicos de terapia antirretroviral.Métodos: Estudio retrospectivo, observacional, y descriptivo del porcentaje de pacientes que alcanzaron cargas virales no detectables y el tiempo que tardaron en lograrlo. Las cohortes fueron: 91 pacientes tratados con zidovudina, lamivudina e indinavir (cohorte A) versus 80 pacientes tratados con estavudina, didanosina e indinavir (cohorte B).Resultados: La evolución de los pacientes fue similar en cuanto al porcentaje de los mismos que alcanzaron CV "no detectables" (75,8% en la cohorte A y 73,8% en la cohorte B) a lo largo del tiempo de seguimiento (cuatro años). El tiempo medio transcurrido hasta alcanzar el referido "éxito" fue diferente, 209 días (IC 95%: 175-243 días) en el caso del régimen A y 330 días (IC 95%: 263-396 días) para el régimen B. El estado inmunológico en el momento de su primera CV "no detectable" de los pacientes que recibían Zidovudina, Lamivudina e Indinavir se encontraba significativamente más conservado que en el otro grupo (83,1 frente a 65,4% para cifras de linfocitos CD4/mm3 superiores a 200, respectivamente; p=0,032).Conclusiones: En nuestro estudio si bien la eficiencia de ambas combinaciones terapéuticas resultó equiparable en cuanto a la similitud del porcentaje de individuos que alcanzaron viremias "no detectables" a lo largo del tiempo de seguimiento, aquéllos tratados con Zidovudina, Lamivudina e Indinavir lo lograron antes.