Search results for " alcohol"
showing 10 items of 578 documents
Recombinant mussel protein Pvfp5β enhances cell adhesion of poly(vinyl alcohol)/k-carrageenan hydrogel scaffolds
2022
Polymeric hydrogels are increasingly considered as scaffolds for tissue engineering due to their extraordinary resemblance with the extracellular matrix (ECM) of many tissues. As cell adhesion is a key factor in regulating important cell functions, hydrogel scaffolds are often functionalized or loaded with a variety of bioactive molecules that can promote adhesion. Interesting biomimetic approaches exploit the properties of mussel-inspired recombinant adhesive proteins. In this work, we prepared hydrogel scaffolds with a 50%w mixture of k-carrageenan (kC) and polyvinyl alcohol (PVA), by a two-step physical gelation process, and we coated them with Perna viridis foot protein-5 beta (Pvfp5 be…
Synthesis of vanillin in water by TiO2 photocatalysis
2012
Abstract The photoproduction of vanillin is studied in aqueous medium starting from trans-ferulic acid, isoeugenol, eugenol or vanillyl alcohol by using both commercial and home prepared TiO2 samples as photocatalysts and batch Pyrex photoreactors. The photo-oxidation at room temperature of these compounds produces vanillin with a selectivity ranging from 1.4 to 21 mol% with respect to the converted substrate. An investigation on the intermediates was performed in the case of trans-ferulic acid; for this substrate the most important intermediates were homovanillic acid, vanillyl mandelic acid, trans-caffeic acid, formic acid, acetic acid, and oxalic acid. The carbon mass balance, including …
La legislación más relevante en materia de adicciones
2005
El presente trabajo tiene como objetivo, exponer sucintamente, y acotada cronológicamente, la legislación más destacada en materia de adicción, con especial referencia al alcoholismo, tabaquismo y drogas. Igualmente se expondrán aquellos elementos comunes y principios que identifica la legislación estatal, y las legislaciones autonómicas en la materia.
Alkoxo, chlorido, and methyl derivatives of oxidomolybdenum(VI) complexes with tetradentate [O3N]-type ligands
2007
Dioxomolybdenum(VI) complex [MoO 2 (Heg) 2 ] (H 2 eg = 1,2-ethanediol) reacts with phenolic ligand precursors tris(2-hydroxy-3,5-dimethylbenzyl)amine (H 3 L Me ) and tris(2-hydroxy-3,5-di- tert -butylbenzyl)amine (H 3 L t Bu ) to form oxomolybdenum(VI) complexes of type [MoO(L R ) (Heg)]. The Heg ligand can be replaced by other alcohols (i.e. 2-aminoethanol, 2-amino-2-methylpropan-1-ol, 2-(dimethylamino)ethanol or allyl alcohol) in the reaction at refluxing toluene or at neat alcohol. Treatment of [MoO(L R )(Heg)] with Me 3 SiCl yields corresponding chlorido complexes [MoO(L R )Cl]. These are also formed in the reaction of H 3 L R with [MoO 2 Cl 2 (dmf) 2 ]. The reaction of [MoO(L R )Cl] wi…
Isobaric (vapour+liquid+liquid) equilibrium data for (di-n-propyl ether+n-propyl alcohol+water) and (diisopropyl ether+isopropyl alcohol+water) syste…
2008
Abstract Isobaric (vapour + liquid + liquid) equilibria were measured for the (di-n-propyl ether + n-propyl alcohol + water) and (diisopropyl ether + isopropyl alcohol + water) system at 100 kPa. The apparatus used for the determination of (vapour + liquid + liquid) equilibrium data was an all-glass dynamic recirculating still with an ultrasonic homogenizer couple to the boiling flask. The experimental data demonstrated the existence of a heterogeneous ternary azeotrope for both ternary systems. The (vapour + liquid + liquid) equilibria data were found to be thermodynamically consistent for both systems. The experimental data were compared with the estimation using UNIQUAC and NRTL models a…
Isobaric vapor–liquid equilibrium for ternary mixtures of ethanol and methylcyclohexane with 3-methylpentane and tert-butyl alcohol at 101.3kPa
2007
Abstract Consistent vapor–liquid equilibrium (VLE) data for the ternary systems 3-methylpentane + ethanol + methylcyclohexane and ethanol + tert-butyl alcohol (TBA) + methylcyclohexane are reported at 101.3 kPa. The VLE data have been correlated by Wilson, UNIQUAC and NRTL equations. The ternary systems do not present azeotrope and are well predicted from binary interaction parameters.
Predictors of weekly alcohol drinking and alcoholrelated problems in binge-drinking undergraduates
2015
Texto en inglés e español Las importantes implicaciones que genera el consumo intensivo de alcohol entre los jóvenes justifican el interés por determinar qué factores predicen su aparición. Concretamente, en este estudio se analiza el papel de la personalidad y edad de inicio en el consumo de alcohol en la predicción del consumo semanal de alcohol, y de todas estas variables en la predicción del número de consecuencias asociadas al consumo en jóvenes universitarios. Se evalúan 213 consumidores intensivos de primer curso de la Universidad Complutense de Madrid. Todos ellos cumplimentaron un autoregistro de consumo, el BIS-11, el NEO-FFI y el IECI de consecuencias asociadas a la ingesta. Los …
Urgencias en alcoholismo: abordaje desde los centros de tratamiento de adicciones
2007
La presentación de situaciones de urgencia en los dispositivos de tratamiento de adicciones constituye una realidad relativamente frecuente.Aunque el papel del médico en el tratamiento de los trastornos adictivos se centra en intervenciones de desintoxicación y deshabituación, deberá contemplar la actuación en estas situaciones. Actuación que estará condicionada por las características del dispositivo asistencial en el que desarrolle su labor y que dependerá de los recursos disponibles y posibilidades de interconsulta.La intervención estará dirigida a prevenir-evitar la presentación de urgencias, identificarlas precozmente si ocurren, tratar lo tratable en situación de seguridad y proceder …
Uztvertā vecāku pārraudzība, smēķēšanas un/ vai alkohola lietošanas biežums pusaudžiem no pilnām un nepilnām ģimenēm.
2018
Pētījuma mērķis bija izpētīt sakarības starp uztverto vecāku pārraudzību un alkohola lietošanas biežumu pusaudžiem no pilnām un nepilnām ģimenēm. Datu ievākšanai tika izmantota Vecāku uzraudzības aptauja ( Parental Monitoring Scale, Stattin & Kerr, 2009), kas sastāv no 24 jautājumiem, kas atspoguļo vecāku uzraudzības veidus., (t.i., ko vecāki zina, pusaudžu atklātība, kontroles sajūta, vecāku kontrole). Apgalvojumi tiek vērtēti pēc Likerta skalas 5 punktu sistēmā (1- „nekad”, 5- „vienmēr”). Un alkohola lietošanas biežuma aptauja (Youth risk behavior survey. Division of adolescent and school health, CDC, 1993.g.). Attiecīgā aptauja sastāv no 5 jautājumiem. Respondentiem tiek lūgts izvērtēt k…
Tipologías de consumidores de alcohol dentro de la práctica del botellón en tres ciudades españolas
2010
In this work, 6,009 youngsters (14-25 years old) who practice the «botellon» were interviewed in three cities of the Valencian Community. After a stratifi ed sampling among college and noncollege students, a two-step cluster analysis was carried out for each sample with two aims: to identify different types of alcohol consumers in the practice of the «botellon» and to carry out a crossed validation of the results obtained. The variables included in the analysis were the following: gender, age group (university students: U; adolescent students: ES), performance of intensive episodes of consumption (yes/no), number of years practicing the «botellon» and grams of alcohol ingested. The results …