Resumen El objetivo del estudio fue identificar las metas de logro y prácticas parentales de apoyo a la autonomía y control psicológico, para determinar la relación entre estas medidas, según el nivel de estudios, el sexo de los progenitores y de los adolescentes de Cuenca, Ecuador. Para ello, se realizó un estudio cuantitativo, relacional de corte transversal con una muestra constituida por 713 madres (Meda d = 43, DT = 7), 543 padres (Medad = 46, DT = 8) y 1085 adolescentes (Medad = 16.1, DT = 1.1). Se aplicó el cuestionario Parental de Metas Orientadas al Logro, adaptado al español del instrumento Parental Achievement Goals AGQ y Autonomy Support Scale. La subteoría de contenido de metas de la teoría de la autodeterminación ha sido la base teórica para explicar que las metas de logro parental orientan el apoyo a la autonomía y el control psicológico. Se emplearon las pruebas .-Student, ANOVA, chi-Cuadrado de independencia para tablas de contingencia y el coeficiente de correlación . de Pearson para establecer la relación lineal de las variables de estudio. Los resultados revelan que las metas de logro dominio de la tarea y éxito en la tarea son predominantes, mientras que la evitación del fracaso en la tarea es baja. Por otro lado, la práctica de apoyo a la autonomía se percibe alta y significativamente mayor al control psicológico. Finalmente, se confirma la relación de las medidas parentales con el nivel de estudios y el sexo de los progenitores y de los adolescentes.

Abstract The importance of parental practices as one the most direct influences on the development of minors and adolescents has generated an increased relevance in recent decades of the study of parental expectations on the psychological adjustment of children. In this sense, the Goal Content Subtheory of Self-Determination Theory has been the theoretical basis to explain that the purpose of human behavior responds to an extrinsic or intrinsic motivation. That is why, extrinsic motivation guides parents towards parental goals: the success of the task and the avoidance of task failure and they adopt more parental control strategies with their progeny, while intrinsic motivation guides the mastery goals of the task which would explain parental support behaviors. The objective of the study was to identify the achievement goals and parenting practices, support for autonomy-psychological control, and to determine the relationship between these parenting measures, according to the sex and educational level of the parents from Cuenca, Ecuador. For this, a quantitative, relational, cross-sectional study was carried out with 713 mothers (Medad = 43, DT = 7), 543 fathers (Medad = 46, DT = 8) and 1 085 adolescents (Medad = 16.1, DT= 1.1). The participants were selected from within 18 educational institutions through a probabilistic sample calculated with a 95 % confidence level, and a 3 % margin of error. For data collection, the Parental Achievement-Oriented Goals questionnaire was applied, adapted to Spanish from the Parental Achievement Goals AGQ instrument; and Autonomy Support Scale. In the data analysis, the T-Student test, ANOVA, Chi-Square, test of independence for contingency tables and the Pearson r correlation coefficient, were used for the linear relationship of the study variables. The results reveal that the achievement goals: mastery of the task and success in the task predominate and the avoidance of failure in the task is low, in terms of the sex of the parents, the parents were oriented towards the mastery of the task while mothers toward goals focused on homework success. Likewise, parents with a low level of education orient themselves to success in the result of the task and the avoidance of failure in the task, while parents with a higher level of education orient their goals of parental achievement towards the mastery of the homework. The perception of support for autonomy is high and significantly upper than the psychological control of the parents, it was found that the manifestation of support “being aware of accepting and acknowledging the child's feelings” is the most valued statement in the mother in relation to the dad. On the other hand, adolescents perceive greater psychological control from mothers than from fathers, in the demonstrations “threatening to punish the child” and “induce guilt”. Regarding the level of studies of the parents, the results indicate that the higher the level of studies, the greater the support for autonomy and when is lower the level of studies, there is greater psychological control. This research has confirmed the relationship between the level of education of the parents, the sex the adolescent and parents with the goals of parental achievement, support and psychological control; this shows that these characteristics affect parental practices. It is necessary for future research to attention on the educational level of the parents, as this is one of the most consistent family variables that can favor appropriate parental goals and practices for the psychosocial adjustment of the children.

Resumen La familia juega un papel fundamental tanto en la socialización como en la configuración de valores en menores y adolescentes. Esta investigación estudia las percepciones del estudiantado adolescente sobre prácticas parentales y valores familiares e identifica las conductas prosostenibilidad de dicho estudiantado en una triple perspectiva: reducir, reutilizar y reciclar (3R). La población diana es el estudiantado de bachillerato de la ciudad de Cuenca (Ecuador). El análisis de datos incluye: comparación de medias, coeficiente de correlación r de Pearson y regresión lineal simple. Los resultados señalan que las mujeres y los varones adolescentes del estudio perciben un elevado apoyo parental a su autonomía y que las madres conceden mayor importancia al valor de ayuda a los demás. Adicionalmente, un alto porcentaje de los sujetos realizan al menos una acción de las 3R. Se concluye que la muestra percibe a la familia como un agente impulsor de su desarrollo como sujetos autónomos, un factor prometedor para la integración de valores y el desarrollo de competencias para la sostenibilidad; sin embargo, reconoce que la escuela es donde se fragua su compromiso con un futuro sostenible con más intensidad.

Abstract The family plays a fundamental role both in socialization and in the configuration of values in minors and adolescents; including those related to environmental care. In keeping with this premise, Unicef (2018) announced that the sustainable development of the planet requires counting on families; it pointed them out as essential collaborators of governments for the quality of life of future generations. Considered a natural and elemental unit of all modern societies and an educational agent of the first order for the development and psychosocial adjustment of its members, the family is also a primary socialization agent (Fontana-Abad, Gil y Reyero, 2013). It plays a key role in the internalization of prosocial values, such as self-transcendence (care and universalism) and conservation (conformity, safety, and tradition); values closely related to pro-environmental behaviors (Barrera-Hernández, Sotelo, Echeverría y Tapia, 2020). Following this line, this research studies the perceptions that adolescents have about family values, parental support for autonomy, and environmental care practices, according to the 3R rule, in a triple perspective: reduce, reuse, and recycle. It uses a quantitative, descriptive, and relational methodology. The target population was high school adolescents from the city of Cuenca (Ecuador). The sample was made up of 122 adolescents which attended three schools: one private educational unit (36.1 %) and two public (27.9 % and 36.1 %). Of the respondents, 38.8 % were female and 61.2 % were male, and they all were between 15 and 19 years old (M = 16.4; SD = 1.2); 27 % were in their first year of high school (15-17 years), 44.3 % were in their second year of high school (16-18 years) and the 28.7 % were in their third year (17-19 years). Data analysis includes comparison of means, Pearson's r correlation coefficient and simple linear regression. The results indicate that a high percentage of the adolescents in the study carry out at least one of the following environmental care actions (these are organized from highest to lowest frequency): saving water and electricity consumption, using garbage cans, reusing bottles, separating garbage, and participating in actions in favor of environment. Likewise, it is detected that they perceive family as a driving agent for their development as autonomous subjects, and a promising factor for the process of integration of values and the development of competencies for caring for the environment; however, they still recognize the school as the place where their commitment to a sustainable future is most intensely forged. Additionally, the adolescents in the study perceive a high parental support for their autonomy and, likewise, that mothers attach greater importance to the value of helping others, a central axis in the ethics of care that characterizes the paradigm of sustainability. This research corroborated, once again, the ONU’s (2015) position when it indicates that the family is a main agent of change for sustainability, with a decisive influence on the preservation of life and ecosystems. It endorses the relevance of promoting educational strategies that promote family-school relations in order to enhance the role of the former in the acquisition of pro-environmental values and, ultimately, its collaboration in the quality of formal education aimed at sustainability. With these results, a path is opened to improve the knowledge on the parental role in relation to the promotion of behaviors of environmental care (pro-sustainability), within the framework of adolescents’ and young people’s formal education.

Abstract 24. The objective of the present work was to evaluate the effect of J-Synch protocol used in heifers on pregnancy rate submitted to fixed time artificial insemination (FTAI). Six hundred and thirteen Angus heifers were used (age range: 13.5 to 15 months; body condition: 3 to 3.5 -scale 1 to 5 (1: emaciated and 5: obese) and weight: ≥ 260 kg. The animals were randomly assigned to the experimental units (heifers) according to a completely randomized design, to the following group: 1) J-Synch (n=205): on day 0 an intravaginal device was inserted with 0.6 g of progesterone (IVD) plus 2 mg of estradiol benzoate. On day 6 the device was removal and 0.15 mg of d-cloprostenol was administered. On day 9 (70-72 h after device removal), 0.10 mg of buserelin was injected and FTAI was performed. 2) Conventional 7D (n=206): on day 0 an intravaginal device (IVD) was inserted plus 2 mg of estradiol benzoate. On day 7 the device was removed and 0.15 mg of d-cloprostenol and 0.5 mg of estradiol cypionate were administered. On day 9 (50-52 h after device removal), FTAI was performed. 3) Conventional 8D (n=202): similar to Conventional group 7D, with the exception that the device remained in the vagina for a period of 8 days. For FTAI, frozen / thawed semen from a bull of proven fertility was used. Gestation diagnosis were performed at 30 days after FTAI. The statistical analysis was made by SAS. A 95% confidence level was established (α=0.05). Animals that lost the device (3.4%) were excluded from the statistical analysis. The pregnancy rate was not different between treatments (J-synch: 50.8%, Conventional 7D: 43.4% and Conventional 8D: 47.7%, p>0.05). In conclusion, J-Synch treatment used in beef heifers (13.5-15 months of age) generates pregnancy rate after FTAI similar to conventional treatment.

Resumen 16. El objetivo del trabajo fue evaluar el efecto del J-Synch en vaquillonas para cría sobre el porcentaje de preñez post inseminación artificial a tiempo fijo (IATF). Se utilizaron 613 vaquillonas Angus (edad: 13,5 a 15 meses; condición corporal: 3 a 3,5 - escala 1 a 5 (1: emaciada, 5: obesa) y peso: ≥ 260 kg). Los animales fueron asignados aleatoriamente a 3 grupos de unidades experimentales (diseño completamente aleatorizado): 1) J-Synch (n=205): el día 0 se colocó un dispositivo intravaginal con 0,6 g de progesterona (DISP) más 2 mg de benzoato de estradiol (BE). El día 6 se retiró el DISP y se administró 0,15 mg de d-cloprostenol. El día 9 (70-72 h post retiro del DISP), se inyectó 0,10 mg de buserelina y se realizó IATF. 17. Convencional 7D (n=206): el día 0 se colocó un DISP más 2 mg de BE. El día 7 se retiró el DISP y se administraron 0,15 mg de d-cloprostenol y 0,5 mg de cipionato de estradiol. El día 9 (50-52 h post DISP) se realizó IATF. 3) Convencional 8D (n=202): ídem grupo Convencional 7D, con la salvedad que el DISP permaneció colocado duran- te 8 días. Para la IATF se utilizó semen congelado/descongelado proveniente de un toro de probada fertilidad. El diagnóstico de gestación se realizó a los 30 días post IATF. El análisis estadístico se realizó por SAS (nivel de confianza: 95%). Los animales que per- dieron el dispositivo fueron excluidos del análisis. El 3,4% de las vaquillonas perdieron el DISP. El porcentaje de preñez no difirió entre tratamientos (J-Synch: 50,8%; Convencional 7D: 43,4% y Convencional 8D: 47,7%, p>0,05). Se concluye que el tratamiento J-Synch utilizado en vaquillonas para cría (13,5-15 meses de edad) genera porcentajes de preñez post IATF similares al tratamiento convencional.

Abstract Non-caloric sweeteners are a good alternative to replace the sweet flavors without the physiological response generated by the consumption of sugars. Alone they are not tools for weight control. Its intake must be accompanied by a proper diet and a healthy lifestyle that includes physical activity. Its usefulness lies in providing a pleasant sweet taste without the energy intake. The safety of each of the compounds is tested and approved and constantly reassessed to take into account the results of new studies. Since there is no perfect sweetener, variety helps that more and more pleasing to the consumer products are developed. This work is the result of a comprehensive review of the literature and discussions of a panel of experts from various specialties: toxicology, obstetrics and gynecology, pediatrics, endocrinology, nutrition, internal medicine, public health and preventive medicine, where literature was widely analyzed reviewing a variety of scientific papers that address the questions that usually are made by health professionals on safety in different age groups and with specific diseases, acceptable daily intake, etc.

Resumen Los edulcorantes no calóricos representan una buena alternativa para sustituir los sabores dulces sin la respuesta fisiológica que genera el consumo de azúcares. Por sí solos no son herramientas para el control de peso. Su consumo debe ir acompañado de una dieta correcta y un estilo de vida saludable que incluya actividad física. Su utilidad radica en proporcionar el agradable sabor dulce sin el aporte energético. La inocuidad de cada uno de los compuestos aprobados está comprobada y se reevalúa constantemente para tomar en cuenta los resultados de nuevos estudios. Debido a que no existe un edulcorante perfecto, la variedad ayuda a que se desarrollen productos cada vez más agradables para el consumidor. Este trabajo es fruto de una revisión exhaustiva de la bibliografía y de las discusiones de un panel de expertos de diversas especialidades: toxicología, ginecoobstetricia, pediatría, endocrinología, nutrición, medicina interna, salud pública y medicina preventiva, en el que se analizó extensamente la bibliografía se revisó una variedad de trabajos científicos que responden a las interrogantes que habitualmente se hacen los profesionales de la salud acerca de seguridad en diferentes grupos etáreos y con afecciones específicas, ingestión diaria admisible, etc.

La presente investigación cuantitativa tiene como finalidad explorar los factores del comportamiento organizacional en jóvenes que inician su carrera laboral, para lo cual se diseñó un instrumento de medida con 35 ítems, con resultados válidos y confiables, aplicado a 215 estudiantes de una universidad privada del noreste de México. Como resultado se pudo observar que las variables utilizadas en el modelo de investigación mostraron el mismo comportamiento entre las personas que se encontraban en su primera experiencia laboral y las que ya habían trabajado anteriormente. Sin embargo, el esfuerzo realizado, el apoyo organizacional percibido, la intención de separación y la percepción económica presentan diferencias estadísticamente significativas utilizando otros factores de comparación.

This quantitative research explores organizational behavior issues for young adults who are starting their work careers. A 35-item survey was designed, and tested for validity and reliability. It was applied in a sample of 215 students in a private university in Northeastern Mexico. The variables in this project show a similar pattern among young adults in their first work experience as among those who had worked in the past. However, Intensity of exerted effort, Perceived organizational support, Intentions to quit and Monetary compensation showed statistically significant differences, when using other factors to compare its.

O presente trabalho de investigação quantitativa, tem como finalidade explorar os factores previsíveis da satisfação laboral tendo como variável diferenciadora a ''Primeira experiencia profissional''. Desenhou-se um instrumento com 35 itens, que incluem: apoio organizacional percebido (AOP), satisfação laboral (SL), perceção económica (PE), intensidade de esforço realizado (IER), intenção de separação (IS) e conflito vida trabalho (CVT), foi aplicado a uma amostra de 215 estudantes universitários de uma Universidade privada do Nordeste do México que estão iniciando a sua carreira laboral. Como resultado, pôde-se observar que as diversas variáveis utilizadas no modelo de investigação mostraram o mesmo comportamento entre as pessoas para quem era a sua primeira experiencia laboral e as pessoas que já haviam trabalhado anteriormente.