Study of microcapsules of essential oils: drug delivery and particle characterization

Essential Oils (EOs) are a substance composed of two phases. A liquid and volatile substance that has aromatic, antibacterial, antioxidant. The properties of EOs are not new to humanity. Indeed, these began to take a role from the first civilizations (Egyptian civilization). Where EOs used as preservatives and flavourings. Nowadays, the use of the EOs is the same. Avoid the growth of bacteria and viruses (theoretical) in food, the contact surface (chairs of the bus), tables, fabrics (clothes). During these last years, the industrial world took the relevance of the microencapsulation technique. This technique pretends to capture the EOs to reach two main objectives. First, contain all his active compounds into a microcapsule to prevent the degradation of the environment. Second, release control into the media, contact surface, or fabrics. Microencapsulation is a beneficial technology to improve fields of biomedicine and the food industry. Besides, the impregnation of these microcapsules on fabrics can develop a lot of new properties. Indeed, the antibacterial and antioxidant properties. The amount of these properties requires an accurate and meticulous methodology. The formation of the microcapsules is very complicated to explain from one point of view. Therefore, it is necessary to collect all the available data. Nevertheless, the research count with very sophisticated equipment, which can provide us with very accurate results. Nanosizer, Spectrophotometer, SEM. The meaning of this research is to make sure if it is possible to control either the diffusion of the EOs and his chemist properties (diameter and morphology). Simple coacervation of microcapsules of ß-cyclodextrin (B-CD) with lavender (L) is the technique that we will follow at the beginning of this research. These simple microcapsules will be impregnated in different fabrics: Polyester (PET), Cotton (COT), and Polyamide (PA). After his impregnation, we must wait until dry in the ambient and make the drug delivery. The complex coacervation is the principal object to study. In this part of the research, we will use Eco Tween 20 (TW) as a surfactant and some crosslinkers: Citric Acid (CA) and Tannic Acid (TA). Due to his addition, we will pay attention to his new chemist properties and behaviour in different fabrics. The drug delivery results will follow a mathematical procedure. This procedure, which will contrast with Korsmeyer-Peppas and Higuchi principles, will help us ascertain his diffusion behaviour.Peer ReviewedPostprint (published version

Goal Orientation Test: An Objective Behavioral Test

The aim of the present research is to assess goal orientation (mastery and performance) by developing an objective behavioral test. We elaborated the Mastery Performance-Goal Orientation Test, a task that allows assessment of goal orientation along a single dimension. We studied its reliability and validity by conducting two studies. In Study 1 (N = 293 adults), the distribution of scores along the goal orientation variable showed wide variability and high internal consistency. The mastery-oriented participants demonstrated higher levels of category learning, whereas the performance-oriented participants responded in a less discriminative way but achieved higher scores. In Study 2 (N = 41 undergraduate students), the mastery-oriented participants achieved higher scores on a learning task than the performance-oriented subjects. The results also showed that the test had the potential to predict subsequent learning. We conclude that it might be a useful instrument to assess goal orientatio

La personalidad en el marco de una teoría del comportamiento humano

Esta obra ofrece una alternativa a los estudios sobre la personalidad realizados desde la perspectiva de la psicología del rasgo, planteando un enfoque de la misma que enmarca la psicología de la personalidad en una teoría de la conducta. Su objetivo es la interpretación de los conocimientos que se poseen sobre la personalidad de los individuos basándose en los planteamientos de la psicología conductua

Chain‑End Functional di‑Sorbitan Oleate Monomer Obtained from Renewable Resources as Precursors for Bio‑Based Polyurethanes

Artículo derivado de una tesis de MCMA three-step synthetic route was proposed and tested to obtain a chain-end functional di-sorbitan oleate monomer: First, 1,18-octadec-9-enedioic acid compound was produced by self-metathesis reaction of an oleic acid; then, the 1,18-octadec 9-enoyl dichloride compound was yielded by chlorination of the di-acid with thionyl chloride, and fnally, the 1,18-di-sorbitan oleate monomer was yielded by esterifcation of the dichloride with 1,4-sorbitan. The di-sorbitan oleate monomer was purifed and then characterized by FTIR, 1 H-NMR, DSC and TGA to establish its structure and properties. A bio-based polyurethane (PU) was synthesized by reacting the obtained 1,18-di-sorbitan oleate monomer and MDI. Rheological analysis showed that a curing reaction occurs as a signifcant increase of the storage modulus (G’) and the complex viscosity (η*) at 100 °C. The obtained bio-based PU was characterized by FTIR, TGA and DMA, confrming that 1,18-di-sorbitan oleate is a feasible monomer for synthesizing polyurethanes.Conacyt CB-2015–01-257591

Emotion, Psychological Well-Being and Their Influence on Resilience. A Study with Semi-Professional Athletes

The objective of the present study is to analyze the influence of coaches on emotional intelligence and on levels of anxiety, motivation, self-esteem, and resilience among athletes. Five-hundred forty-seven semi-professional athletes between the ages of 16 and 19 participated in this study. Various statistical analyses were conducted which explain the causal relationships between the variables. The results, obtained using a structural equations model, find that while autonomy support positively predicts emotional intelligence, perceived control predicts it negatively. Moreover, emotional intelligence positively predicts self-esteem and self-determined motivation, but negatively predicts anxiety. Other results show that self-esteem positively predicts self-determined motivation, whereas anxiety predicts it negatively. Finally, self-determined motivation positively predicts resilience. Indeed, the study demonstrates the influence and the importance of coaches in relation to the emotional intelligence, psychological well-being, and motivational processes of adolescent athletes when the latter engage in their respective sports. These results help to better understand how different behavioral, emotional, and social aspects belonging to the athlete interrelate with one another during competition

Influence of Physical Education Teachers on Motivation, Embarrassment and the Intention of Being Physically Active During Adolescence

According to a WHO report (2018), more than 80% of adolescents do not do enough physical activity. Physical Education (PE) classes should be aimed at solving this problem. The present study aims to analyze the influence teachers have on motivation, embarrassment and intention to be physically active among their students. A total of 604 secondary school students participated in the study. Various statistical analyses were carried out to explain the causal relationships between the variables. The results revealed a positive relation between the autonomy support and the satisfaction of basic psychological needs (BPN), and a negative relation with the frustration of BPN. In contrast, perceived control revealed a positive relation with frustration of BPN, and a negative relation with the satisfaction of BPN. Satisfaction of BPN was negatively related to embarrassment and positively related to self-determined motivation. On the other hand, frustration of BPN was positively related to embarrassment and negatively with self-determined motivation. Embarrassment was negatively related to self-determined motivation, and the latter was positively related to intention to be physically active. Indeed, the study demonstrates the influence and the importance of PE teachers and of the motivational and emotional processes of adolescents during PE classes and the role they play in acquiring the habits of an active lifestyle

Modelos de regresión espacio temporales en la estimación municipal de la renta. Estimación de la RFDPC municipal en la región de Murcia

Muy recientemente han aparecido estudios en los que haciendo uso de técnicas de econometría espacial, se han realizado nuevas estimaciones de la renta municipal eliminando los problemas de autocorrelación espacial que presentaban los modelos anteriores. Estos modelos poseen una elevada capacidad explicativa, pero tienen ciertas carencias al utilizarlos con intención predictiva. El objetivo de este estudio es plantear una alternativa a la estimación de la renta municipal mediante modelos espacio-temporales de regresión que simultáneamente solucione dos problemas: el problema de autocorrelación espacial y a la falta de capacidad predictiva de ciertos modelos espaciales de regresión. Se utiliza el modelo teórico desarrollado con el fin de realizar una estimación de la Renta Familiar Bruta Disponible per cápita de los municipios de la Región de Murcia

Una aplicación de técnicas multivariantes al estudio de la activación neurohormonal en el infarto agudo de miocardio

En el presente se evalúan los cambios en los niveles plasmáticos de 4 neurohormonas (la renina, el péptido natriuréitco -PAN-, la vasopresina y la noradrenalina) en la fase aguda del infarto agudo de miocardio y su posible relación con la extensión del mismo; con los volúmenes y fracción de eyección del ventrículo izquierdo (VI) y con los cambios en los volúmenes con el tiempo (el infarto agudo de miocardio supone para muchos pacientes el desarrollo de dilatación ventricular izquierda - aumento de volúmenes- y deterioro de la fracción de eyección). Otros objetivos son valorar si los niveles plasmáticos de estas hormonas se relacionan con el desarrollo de complicaciones en el seguimiento y si están influidos por pertenecer a uno de los dos grupos de tratamiento que se corresponden con dos fármacos: captopril (grupo 0) o atenolol (grupo 1). Para la realización del análisis se ha utilizado el Modelo Lineal General (medidas repetidas). Se ha considerado como factor intra-sujetos el instante de tiempo en que se observan los niveles plasmáticos hormonales diferenciando (factores Intersujetos) el tratamiento seguido por los pacientes (Atenolol ó Captopril) y su sexo. El estudio ha sido realizado utilizando el paquete estadístico SPSS