To our knowledge, this report was the first available study of the equipment and human resources utilized for RRT in AKI patients in Latin America.

Plants of Amaranthus cruentus and Amaranthus hybridus resistant to atrazine and cyanazine were found in maize fields in north‐eastern Spain. Both resistant foiotypes survived doses of 5 kg ha−1 of atrazine and 2–4 kg ha−1 of cyanazine but were controlled by lower doses of bentazone and pyridate than were susceptible biotypes. Such a negative cross‐resistance was not found for chloroacetamides and MCPA. Chlorophyll fluorescence studies revealed that atrazine, bentazone, cyanazine and pyridate (10 mg litre−1) caused inhibition of photosynlhetic electron transport in susceptible leaves, while in resistant plants, atrazine and cyanazine had no effect. Conversely, bentazone and pyridate inhibited photosynthesis to a greater extent in resistant than in susceptible biotypes. Isolated chloroplast membranes from resistant biotypes showed resistance factors of 366 and 501 to atrazine and 39 and 60 to cyanazine for A. hybridus and A. cruentus, respectively. Bentazone and pyridate were found to be more effective in chloropiasts of the resistant biotypes than those of the susceptible plants. It is suggested that enhanced susceptibility to bentazone and pyridate in triazine‐resistant A. cruentus and A. hybridus biotypes may be associated with the alteration of the D‐I polypeptide subunit of photosystem II, as found in triazine‐resistant plants.

Triazine-resistant (R) biotypes of common lambsquarters, yellow foxtail, and hairy fleabane were found in the Province of Córdoba (Andalusia, Southern Spain). The former two R biotypes came from atrazine-treated cornfields, whereas the latter came from simazine-treated nontilled olive orchards. The R biotypes of common lambsquarters and yellow foxtail and the R biotype of hairy fleabane survived at doses up to 5 kg ai/ha of soil-applied atrazine or simazine, respectively. Photosynthetic electron transport in R biotypes was unaffected by atrazine and simazine but was inhibited by diuron, as shown by fluorescence induction measurements in whole leaves. In Hill reaction assays, the R biotypes showed high resistance to atrazine and simazine (resistance factors in the range of 350 to 550), medium to high resistance to ametryn, terbumeton, metribuzin, and monolinuron (resistance factors in the range of 80 to 250), slight resistance to diuron and methabenzthiazuron (resistance factors in the range of 1.1 to 15.7), and reverse resistance to swep, ioxynil, and DNOC (resistance factors less than 1). It is concluded that the R biotypes have a chloroplast mode of resistance similar to that previously described for other triazine-resistant weed biotypes.

Introducción: La satisfacción del paciente con los cuidados enfermeros se ha convertido en un determinante clave de la calidad de la atención sanitaria. Además, esto es especialmente relevante, sobre todo en pacientes crónicos, como es el caso del paciente con enfermedad renal crónica avanzada en hemodiálisis. Objetivo: Analizar los factores que intervienen en la satisfacción de los pacientes en hemodiálisis respecto al personal de enfermería. Metodología: Se ha llevado a cabo un estudio cualitativo, de tipo fenomenológico, mediante grupo focal de 7 pacientes en hemodiálisis de la Unidad de Gestión Clínica de Nefrología de Córdoba. Los sujetos fueron seleccionados mediante muestreo intencionado, tras su consentimiento informado. Resultados: Se han categorizado los resultados según las dimensiones de la calidad percibida. Respecto a la accesibilidad creen que son bien atendidos, pero pierden mucho tiempo en la unidad de diálisis. En cuanto a la fiabilidad, confían en las enfermeras con destreza para pinchar la fístula y desconfían de las enfermeras nuevas. Respecto a la comunicación, resaltan la buena relación existente entre ellos y el personal de enfermería. El trato es percibido como un punto fuerte, agradable y humano, en general. De forma generalizada destacan en las enfermeras un alto grado de competencia profesional, ligada al grado de fiabilidad que tengan con la enfermera. En general, califican el servicio asistencial que reciben de muy bueno e incluso excelente. Conclusiones: Este grupo de pacientes en hemodiálisis destaca la relación que se crea entre ellos y enfermería. Tienen un alto grado de confianza en el personal de enfermería, basado en su destreza para pinchar la fístula arteriovenosa y en su fiabilidad profesional.

Triazine-resistant (R) biotypes of Amaranthus albus L, (tumble pigweed), A. blitoides S. Wats, (prostrate pigweed), A. hybridus L. (smooth pigweed), A. retroflexus (redroot pigweed), and Solanum nigrum L. (black nightshade) were found in Spain. The former two R biotypes were found in simazine-treated, non-tilled olive orchards, whereas the latter three came from atrazine-treated maize (Zea mays L.) crops. All R biotypes survived at rates up to 5-0 kg ha"' of soil-incorporated atrazine or simazine, whereas their susceptible (S) or 'wild type' counterparts were completely controlled at levels of 0-25 kg ha~' atrazine, in the case of A. hybridus, A. retroflexus and S. nigrum, and 2-5 kg ha"' in the case of A. albus and A. blitoides. The higher tolerance to triazines of these latter S biotypes appears to be attributable to herbicide detoxification. Photosynthetic electron transport in R biotypes was litde affected by atrazine and simazine, but was inhibited by diuron, as shown by fluorescence induction measurements in whole leaves. In Hill reaction assays, the R biotypes showed a high level of resistance to atrazine and simazine (resistance factors in the range 350-900), and very slight resistance to diuron (resistance factors in the range 11-1-6). It is concluded that all R biotypes have evolved a 18 R. De Prado et al.