Polystyrene Macroporous Magnetic Nanocomposites Synthesized through Deep Eutectic Solvent-in-Oil High Internal Phase Emulsions and Fe3O4 Nanoparticles for Oil Sorption.

In this work, we report a nonaqueous one-step method to synthesize polystyrene macroporous magnetic nanocomposites through high internal phase emulsions (HIPEs) formulated with the deep eutectic solvent (DES) composed of urea:choline chloride (U:ChCl, in a 2:1 molar ratio) as the internal phase and co-stabilized with mixtures of Span 60 surfactant and non-functionalized magnetite nanoparticles (Fe3O4 NPs). The porous structure and the magnetic and lipophilic properties of the nanocomposite materials were easily tailored by varying the amount of Fe3O4 NPs (0, 2, 5 and 10 wt %) and the surfactant Span 60 (0, 5, 10, and 20 wt %) used in the precursor emulsion. The resultant nanocomposite polyHIPEs exhibit high sorption capacity toward different oils (hexane, gasoline, and vegetable oil) due to their high porosity, interconnectivity, and hydrophobic surface. It was observed that the oil sorption capacity was improved when the amount of surfactant decreased and Fe3O4 NPs increased in HIPE formulation. Therefore, polyHIPE formulated with 5 and 10 wt % Span 60 and Fe3O4 NPs, respectively, showed the highest oil sorption capacities of 4.151, 3.556, and 3.266 g g-1 for gasoline, hexane, and vegetable oil, respectively. In addition, the magnetic monoliths were reused for more than ten sorption/desorption cycles without losing their oil sorption capacity.

[Somatic, biochemical and arterial pressure at the end of adolescence, according to weight at birth]. / Diferencias somáticas, bioquímicas y de presión arterial al finalizar la adolescencia, según el peso al nacer.

OBJECTIVE: To investigate in young people differences among somatic measurements, biochemical issues and arterial tension, according to weight at birth. MATERIAL AND METHODS: 53 youth born with body weight <2500 g, and 100 born with normal weight were studied. VARIABLES: somatic measurements, arterial pressure, glucose, insulin, cholesterol and triglycerides. Insulin resistance and metabolic syndrome were also evaluated. RESULTS: Men born with normal weight had higher cholesterol and resistance to insulin. Differences persisted for odds ratio. Those born with <2500 g had a negative correlation among weight at birth and glucose level. Overweight-obesity was found in 30.0% (46/153) and the metabolic syndrome in 10% (14/140); the frequency of this syndrome increased with the IMC was higher: from 2.0% (2/100) in eutrophics to 30% (12/40) in those with overweight-obesity. CONCLUSIONS: The findings stand out the magnitude of the adiposity and of the metabolic syndrome in youths.

Diferencias somáticas, bioquímicas y de presión arterial al finalizar la adolescencia, según el peso al nacer / Somatic, biochemical and arterial pressure at the end of adolescence, according to weight at birth

Objetivo: Investigar las discrepancias somáticas, bioquímicas y de presión arterial según el peso al nacer. Material y métodos: Se estudiaron 53 jóvenes que nacieron con peso < 2500 g y 100 jóvenes con peso normal. Variables: somatometría, presión arterial, y concentraciones en suero de glucosa, insulina, colesterol y triglicéridos. Se estudió la presencia de resistencia a la insulina y de síndrome metabólico. Resultados: Los varones nacidos con peso normal tuvieron mayor colesterol en suero, pliegue tricipital y resistencia a la insulina. Las diferencias en resistencia a la insulina persistieron por razón de momios. En los de peso bajo al nacer, a menor peso mayor concentración de glucosa. Se encontró sobrepeso obesidad en 30% (46/153) y síndrome metábólico en 10% (14/140): la frecuencia de éste aumentó con el IMC; de 2% (2/100) en eutróficos a 30 % (12/40) en quienes tenían sobrepeso obesidad. Conclusiones: Los hallazgos resaltan la magnitud de la adiposidad y del síndrome metabólico en jóvenes.

Objective: To investigate in young people differences among somatic measurements, biochemical issues and arterial tension, according to weight at birth. Material and methods: 53 youth born with body weight <2500 g, and 100 born with normal weight were studied. Variables: somatic measurements, arterial pressure, glucose, insulin, cholesterol and triglycerides. Insulin resistance and metabolic syndrome were also evaluated. Results: Men born with normal weight had higher cholesterol and resistance to insulin. Differences persisted for odds ratio. Those born with <2500 g had a negative correlation among weight at birth and glucose level. Overweight-obesity was found in 30.0% (46/153) and the metabolic syndrome in 10% (14/140); the frequency of this syndrome increased with the IMC was higher: from 2.0% (2/100) in eutrophics to 30% (12/40) in those with overweight-obesity. Conclusions: The findings stand out the magnitude of the adiposity and of the metabolic syndrome in youths.