Estudio de la reacción entre el Hg(l) y el ácido etilenglicol bis (β-amino etil éter) tetraacético. Determinación espectrofotométrica de Hg22+

The reaction between Hg(I) and ethyleneglycol bis (β-aminoethylether)- N, N, N3, N3 tetraacetate (EGTA) in a weakly acidic médium (pH ≈ 5) is studied by U. V. spectrophotometric techniques. The maxiraum of absorption which appears at 247 nm is supposed due to the formation of a Hg(I) - EGTA complex. This compotmd is unstable and it decomposes slowly with formation of Hg(II) chelate and metallic mercury. When the absorbance is measured at fixed time (5 minutes), it is fovmd that Beer's law is obeyed from 1 up to 30 p p m of Hg(I) at 247 nm

Estudio de la reacción entre el Cr(lll) y el ADCT catalizada por el CO3H1-. Determinación cinética de CO3H1-

A new kinetic method for the determination of CO3H1- is presented. It is based on the catalytic effect that this anión produces on the slow reaction of complexation between Cr(III) and DCyTA. The influence of different variables on the process, the effect of interferent ions and the mechanism of the reaction are studied. CO3H1- may be determined between 2-500 p.p.m. with good analytical results. The method has been appHed for the analysis of combined CO2 in natural waters

Associations between eating speed, diet quality, adiposity, and cardiometabolic risk factors

Objective: To assess the associations between eating speed, adiposity, cardiometabolic risk factors, and diet quality in a cohort of Spanish preschool-children. Study design: A cross-sectional study in 1371 preschool age children (49% girls; mean age, 4.8 ± 1.0 years) from the Childhood Obesity Risk Assessment Longitudinal Study (CORALS) cohort was conducted. After exclusions, 956 participants were included in the analyses. The eating speed was estimated by summing the total minutes used in each of the 3 main meals and then categorized into slow, moderate, or fast. Multiple linear and logistic regression models were fitted to assess the β-coefficient, or OR and 95% CI, between eating speed and body mass index, waist circumference, fat mass index (FMI), blood pressure, fasting plasma glucose, and lipid profile. Results: Compared with participants in the slow-eating category, those in the fast-eating category had a higher prevalence risk of overweight/obesity (OR, 2.9; 95% CI, 1.8-4.4; P < .01); larger waist circumference (β, 2.6 cm; 95% CI, 1.5-3.8 cm); and greater FMI (β, 0.3 kg/m2; 95% CI, 0.1-0.5 kg/m2), systolic blood pressure (β, 2.8 mmHg; 95% CI, 0.6-4.9 mmHg), and fasting plasma glucose levels (β, 2.7 mg/dL, 95% CI, 1.2-4.2 mg/dL) but lower adherence to the Mediterranean diet (β, −0.5 points; 95% CI, −0.9 to −0.1 points). Conclusions: Eating fast is associated with higher adiposity, certain cardiometabolic risk factors, and lower adherence to a Mediterranean diet. Further long-term and interventional studies are warranted to confirm these associations

Estudio de la reacción entre el Cr(lll) y el ADCT catalizada por el COgH1- Determinación cinética de CO3H1-

Debido a que no se encuentra ningún antecedente bibliográfico sobre la reacción entre el ADCT y el Cr(III), presentamos un amplio estudio sobre este proceso catalizado por el CO3H1-. Deducido del mismo, se aporta un método cinético sensible y suficientemente exacto y oreciso oara la determinación del CO2 combinado (CO3 v CO3H1-) en aguas naturales

Estudio de la reacción entre el Hg(l) y el ácido etilenglicol bis (B-amino etil éter) tetraacético

En este trabajo se presentan los resultados obtenidos por vía espectrofotométrica en el ultravioleta, con la especie AEGTH2- Na2. Previamente, y aunque no damos cuenta de ello aquí, con fines comparativos y de aclaración efectuamos un amplio y profundo estudio espectrofotométrico de las especies complejas más sencillas que se originan entre el Hg(I) y los ligandos CIO4--, NO3,1- y CH3,1-COO1- (13)

Terapia alternativa en una unidad de hemodinámica

La audioterapia es una terapia complementaria a la medicina tradicional, con la que se pueden tratar estados de ansiedad y estrés. Muchas veces olvidada y descartada como una oferta más en el abanico de posibilidades del tratamiento de la ansiedad, en este trabajo demostramos que puede sustituir al tratamiento farmacológico habitual de relajación mediante ansiolíticos

Terapia alternativa en una unidad de hemodinámica

La audioterapia es una terapia complementaria a la medicina tradicional, con la que se pueden tratar estados de ansiedad y estrés. Muchas veces olvidada y descartada como una oferta más en el abanico de posibilidades del tratamiento de la ansiedad, en este trabajo demostramos que puede sustituir al tratamiento farmacológico habitual de relajación mediante ansiolíticos

An Ecosystem-Based Approach to Assess the Status of a Mediterranean Ecosystem, the Posidonia oceanica Seagrass Meadow

17 páginas, 8 tablas, 3 figurasBiotic indices, which reflect the quality of the environment, are widely used in the marine realm. Sometimes, key species or ecosystem engineers are selected for this purpose. This is the case of the Mediterranean seagrass Posidonia oceanica, widely used as a biological quality element in the context of the European Union Water Framework Directive (WFD). The good quality of a water body and the apparent health of a species, whether or not an ecosystem engineer such as P. oceanica, is not always indicative of the good structure and functioning of the whole ecosystem. A key point of the recent Marine Strategy Framework Directive (MSFD) is the ecosystem-based approach. Here, on the basis of a simplified conceptual model of the P. oceanica ecosystem, we have proposed an ecosystem-based index of the quality of its functioning, compliant with the MSFD requirements. This index (EBQI) is based upon a set of representative functional compartments, the weighting of these compartments and the assessment of the quality of each compartment by comparison of a supposed baseline. The index well discriminated 17 sites in the north-western Mediterranean (French Riviera, Provence, Corsica, Catalonia and Balearic Islands) covering a wide range of human pressure levels. The strong points of the EBQI are that it is easy to implement, non-destructive, relatively robust, according to the selection of the compartments and to their weighting, and associated with confidence indices that indicate possible weakness and biases and therefore the need for further field data acquisition.Peer reviewe