Search results for "UIC"
showing 10 items of 929 documents
Full inhibition of enzymatic browning in the presence of thiol-functionalised silica nanomaterial
2018
[EN] Darkening processed fruits and vegetables is caused mainly by enzymatic browning through polyphenol oxidase (PPO) action. Accordingly, we explored the potential of four silica-based materials (MCM-41 nanometric size, MCM-41 micrometric size, UVM-7 and aerosil), non-functionalised and functionalised with thiol groups, to inhibit PPO activity in the model system and apple juice. All materials showed relevant performance when immobilising and inhibiting PPO in model systems, and support topology is a main factor for enzyme immobilisation and inhibition. Thiol-containing silica UVM7-SH showed the greatest inactivation, and similar browning values to those obtained by acidification. The enz…
Influence of the functionalisation of mesoporous silica material UVM-7 on polyphenol oxidase enzyme capture and enzymatic browning
2020
Polyphenol oxidase (PPO), also known as tyrosinase and catechol oxidase, is the enzyme responsible for enzymatic browning in foods. It causes undesirable organoleptic, nutritional and colour changes. Here, we report the preparation of five nanomaterials and a study of their ability to modulate PPO enzyme activity. The materials consist of UVM-7 supports (a mesoporous silica material) modified with diverse functional groups (i.e. amine, carboxylic acid, isocyanate, alkane and pyridine). We also studied the PPO immobilisation capability of the materials. All the materials, except the carboxylic acid functionalised one, offer high PPO loading capabilities and the immobilisation speed increases…
Mindfulness Training for Children with ADHD and Their Parents: A Randomized Control Trial
2021
Objective: The aim of this randomized control trial is to analyze the efficacy of a Mindfulness-based program (MYmind) in improving ADHD symptoms, associated problems, executive functions, and family functioning. Method: The sample was composed of 30 children (9–14 years old) with an ADHD diagnosis and their parents. Participants were randomized into two groups, the MYmind group ( n = 15) and a wait-list group ( n = 15). Participants were assessed in three time periods: pre-, post-intervention, and at 6-month follow-up. Results: After the program, parents reported a decrease in parenting stress and improvements in parenting styles. Six months after the intervention, parents reported signifi…
Dielectric Characterization of Fruit Nectars at Low RF Frequencies
2015
Dielectric properties of apple, apricot, peach, and pear nectars were studied in the frequency range from 15 kHz to 30 MHz and the temperature range from 25 to 60 degrees C. Both the relative dielectric constants and the dielectric loss factors decreased by increasing frequency and increased linearly with increasing temperature with values in the order 10(4)-10(2) and 10(5)-10(2), respectively. The power dissipation densities and the power penetration depths were found to increase linearly with temperature. Power dissipation densities remained essentially constant for all the samples while power penetration depths decreased significantly on increasing frequency. The dependence of each of th…
An integrated genome research network for studying the genetics of alcohol addiction
2010
Alcohol drinking is highly prevalent in many cultures and contributes to the global burden of disease. In fact, it was shown that alcohol constitutes 3.2% of all worldwide deaths in the year 2006 and is linked to more than 60 diseases, including cancers, cardiovascular diseases, liver cirrhosis, neuropsychiatric disorders, injuries and foetal alcohol syndrome. Alcoholism, which has been proven to have a high genetic load, is one potentially fatal consequence of chronic heavy alcohol consumption, and may be regarded as one of the most prevalent neuropsychiatric diseases afflicting our society today. The aim of the integrated genome research network 'Genetics of Alcohol Addiction'-which is a …
Actividad real y actividad ideal (§§ 3 y 4)
2012
La nocion de intuicion intelectual que Fichte introduce en el § 1 causa continuamente problemas en la exposicion. Por convincente que esa nocion pueda ser en principio, resulta enseguida patente que se trata de una nocion hibrida, la nocion de algo que ni es intuicion ni es concepto, que puede hacer referencia a algo que no es ni lo uno ni lo otro, pero que a veces hace referencia a ambos a la vez. Por «intuicion intelectual» y por «intuicion» en general Fichte entiende en estos paragrafos introductorios la auto-transparencia de una actividad intelectual en el propio ejercicio de esa actividad. En contraposicion con la intuicion intelectual, el concepto no puede ser sino un echarse para atr…
Fenomenología del prejuicio
1992
Not available.<br><br>Este trabajo expone la defensa del «prejuicio » llevada a cabo por Gadamer, mostrando su efectividad histórica y confrontándola con la crítica husserliana del «prejuicio» desde el apriorismo. Se pone de relieve, además, la historicidad del «mundo de la vida» y su incidencia en la teoría del <i>a priori</i>, para terminar con un estudio de la racionalidad del <i>a priori</i> y la facticidad del prejuicio.
Los prejuicios no percibidos y el caso Sócrates: un ejemplo paradigmático
2021
En un trabajo anterior defendimos que no se había prestado suficiente atención al procedimiento utilizado en el juicio contra Sócrates, sin que examináramos las causas de esa desatención. Ahora, tras analizarlas, llegamos a la conclusión de que ese procedimiento se habría malentendido completamente al haberse implementado un prejuicio no percibido. Habríamos extrapolado a ese procedimiento los presupuestos individualistas de los procedimientos vigentes hoy en día y, en consecuencia, habríamos estado sordos a lo que nos dice la tradición. Un ejemplo de sordera que podría ser muy útil para detectar otros casos semejantes de implementación de prejuicios no percibidos. In a previous work, we de…
Testing the stage-discharge relationship of a sharp crested sluice gate deduced by the momentum equation for a free-flow condition
2018
Abstract In this paper the stage-discharge relationship of a sharp crested sluice gate is deduced by applying the momentum equation for a free flow condition. The theoretically deduced stage-discharge formula was then calibrated using experimental flume data obtained in previous investigations carried out for a free-flow condition. The deduced stage–discharge relationship is characterized by a momentum coefficient which is empirically estimated by the ratio between the height of the orifice and the water depth in the section upstream the gate. The relative errors are always less than or equal to - 10% to +10% and 71.4% of the errors are less than or equal to ± 2%.
Byssochlamys nivea inactivation in pineapple juice and nectar using high pressure cycles
2009
The aim of this work was to assess the inactivation of Byssochlamys nivea ascospores in pineapple juice and nectar by combining pressure sequences involving high pressure cycles with relatively mild thermal processing. The effect of 550 and 600 MPa sustained pressures (holding time of 15 min), combinations of sustained pressures and pressure pulses (holding time of 10 s), and pressure cycles (two, three and five cycles of 550 and 600 MPa for 7.5, 5 and 3 min, respectively), at 20, 40, 60, 70, 80 and 90 °C were compared. B. nivea ascospores were inactivated by applying sustained a pressure of 600 MPa at 90 °C for 5 min (juice) and 15 min (nectar), and three and five cycles of pressure at 600…