Sobre la presencia de Sternbergial Lutea (L.) Ker-Gawler (Amaryllidaceae) en extremadura

On the presence of Sternbergia iutea (L.) Ker-Gawler (Amaryllidaceae) in Extremadura. Palabras clave. Sternbergia, Amaryllidaceae, corología, Extremadura, España. Key words. Stern bergia, Amaryllidaceae, chorology, Extremadura, Spain

Centaurea sulphurea Willd. (Asteraceae), a novelty for the Western Andalusian flora

Centaurea sulphurea Willd. (Asteraceae), a novelty for the Western Andalusian flora Palabras clave. Centaurea, Asteraceae, corología, Cádiz, Andalucía Occidental, Península Ibérica.Key words: Centaurea, Asteraceae, chorology, Cadiz, Western Andalusia, Iberian Peninsula

A systematic review of ongoing clinical trials in optic pathway gliomas

INTRODUCTION: Optic pathway gliomas (OPGs), also known as Visual Pathway Gliomas, are insidious, debilitating tumours. They are most commonly WHO grade 1 pilocytic astrocytomas and frequently occur in patients with neurofibromatosis type 1. The location of OPGs within the optic pathway typically precludes complete resection or optimal radiation dosing, hence outcomes remain poor compared to many other low-grade gliomas. The aim of this systematic review was to formulate a comprehensive list of all current ongoing clinical trials that are specifically looking at clinical care of OPGs in order to identify trends in current research and provide an overview to guide future research efforts. METHODS: This systematic review was conducted in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. The Cochrane Controlled Register of Trials (CENTRAL) and ClinicalTrials.gov were searched. Inclusion and exclusion criteria were applied and final results were reviewed. RESULTS: 501 clinical trials were identified with the search strategy. All were screened and eligible studies extracted and reviewed. This yielded 36 ongoing clinical trials, 27 of which were pharmacological agents in phase I-III. The remaining trials were a mixture of biological agents, radiation optimisation, diagnostic imaging, surgical intervention, and a social function analysis. CONCLUSION: OPG is a complex multifaceted disease, and advances in care require ongoing research efforts across a spectrum of different research fields. This review provides an update on the current state of research in OPG and summarises ongoing trials

Heavy metals transport in typical portuguese loamy sand soils

Illegal discharges are of great concern among industry activities, since they occur under uncontrolled conditions. In most cases, effluents are acidic and the concentrations of heavy metals are very high. With this in mind, the main goal of this study was to evaluate the sorption of two of the most toxic heavy metals, Cr(VI) and Pb(II), in those conditions. A loamy sand soil was collected in Oporto, Portugal. Batch equilibrium and kinetic sorption experiments were performed using both metals solutions, with concentrations among 50 mg L-1 and 200 mg L-1, at pH 2 and 5, between 2 h and 288 h. To evaluate the sorption equilibrium, eight isotherm models were fitted. Better adjustments were observed for the Redlich-Peterson and Khan models for the adsorption of chromium (R2 = 0.99), and of lead (R2 = 0.99), respectively. The sorption kinetics was evaluated using three models – Elovich, Pseudo first order and an empirical power function. The retention of lead was almost instantaneous and the empirical power function described better the sorption kinetics of chromium (0.89 < R2 < 0.99). In addition, flow experiments were performed with effluents of both metals (50 mg L-1) at pH 2 and 5, for about 90 h. Results revealed a high retention of chromium, and a weak retention of lead, for low pH values. FTIR analyses to the columns samples revealed that clay minerals have an important role in the retention of both metals

Accuracy of a method based on atomic absorption spectrometry to determine inorganic arsenic in food : Outcome of the collaborative trial IMEP-41

Peer reviewedPublisher PD

Estudio palinológico del género Scrophularia L. en la Península Ibérica e Islas Baleares

Pollen grain characters of 78 populations belonging to 29 taxa of genus Scrophularia L. from the Iberian Peninsula and Balearic Islands were studied using a light and scanning electron microscopy, all of them showing a remarkable uniformity. Although the shape and size of the pollen grains in the genus are not in general important from the taxonomic point of view, however the density of the reticulum is very useful in the segregation of taxa of sections Scrophularia and Canina G.Don present in the area of study.Se estudian al microscopio óptico y electrónico de barrido los caracteres polínicos de 78 poblaciones pertenecientes a 29 táxones del género Scrophularia L. representados en la Península Ibérica e Islas Baleares, corroborándose la estenopalinidad ya conocida del género. Aunque en líneas generales la forma y tamaño de los granos carecen de interés taxonómico sí la posee, por el contrario, la densidad del retículo, que resultó de utilidad en la segregación de los táxones de las secciones Scrophularia y Canina G.Don presentes en el territorio

Contribución al conocimiento florístico de las Sierras de Algeciras (Cádiz, España)

A number of 745 taxa are indicated from mountains near Algeciras (Cádiz), withais- tribution in this area, abundance and flowering date.Se relaciona un total de 745 taxones para las sierras cercanas a la población de Algeciras (Cádiz), de las que se indica su distribución en la zona, abundancia y época de floración

Microflora associated with healthy and diseased turbot (Scophthalmus maximus) from three farms in northwest Spain

14 páginas, 4 tablas, 3 figurasA comparative analysis of the microbiological quality of three turbot (Scophthabnus maximus) farms (A, B, and C) located in Galicia (northwest Spain) is given. The microbial load and types of bacteria in the internal organs (liver and kidney) of apparently healthy fish was monitored over a year, and all the disease problems occurring during this survey were analyzed. The percentage of healthy turbot in which positive bacterial growth was obtained was relatively high in the three ongrowing facilities. Farm A exhibited the poorest conditions of fish health with an average of 42% fish infected, while farm B showed the best microbiological quality with 27% of turbot harbouring bacteria in the internal organs. In all three farms, a wide range of bacteria was found in healthy turbot with Vibrio ( V. splendidus-V pelagius, Vjisheri-V harveyi and Vibrio spp.) and Pseudomonas spp. being the predominant groups comprising at least 80% of the total bacterial isolates in each farm. The highest number of pathological problems (22 ) with the most diverse bacterial flora occurred in farm A. Vibrio spp. and Pseudomonas spp. were the most prevalent bacteria recovered from diseased turbot. Haemorrhages in palate and jaws, tail and fins, and ulcerative lesions were the most frequent external clinical signs of diseased fish recorded in the three farms. However, it was not possible to associate a particular bacterial species with a specific pathology. Routine use in farm A of oxolinic acid and nitrofurantoin may have led to the development in the Vibrio strains of resistances to both chemotherapeutants (up to 25%).This study was supported by Grants MAR 9 l- 1133~CO2-0 1 and MAR 89- 0270 from the Comision Interministerial de Ciencia y Tecnologia (CICYT), XUGA 8030389 from Xunta de Galicia (Spain), and EUREKA project No. EU-347, between Spain and Norway.Peer reviewe