Investigando la relación entre el autocontrol, la edad y el desajuste psicológico en adolescentes y jóvenes adultos españoles

Este estudio explora las tendencias evolutivas en el autocontrol y su relación con el desajuste psicológico en adolescentes y jóvenes adultos. La muestra estuvo compuesta por 1,600 adolescentes y jóvenes adultos españoles de entre 12 y 34 años (M = 22.28, DT = 6.94) seleccionados aleatoriamente. Se administraron medidas de autocontrol, adicción a internet y síntomas de ansiedad-depresión. El sexo y la edad fueron utilizados como variables de control. Los resultados indicaron que los adolescentes con edades comprendidas entre los 15 y 19 años mostraron las puntuaciones más bajas en autocontrol, mientras que los participantes de más edad puntuaron más alto. Puntuaciones bajas en autocontrol estuvieron significativamente asociadas con mayor consumo de sustancias, más síntomas de ansiedad-depresión y puntuaciones más elevadas en la escala de adicción a internet. Además, los participantes con puntuaciones más altas en la escala de adicción puntuaron más bajo en autocontrol. Estos resultados evidencian las relaciones entre el autocontrol y algunos problemas emocionales y conductuales y sugieren la importancia de promover el autocontrol para prevenir la adicción a internet, el consumo de sustancias y los problemas de ansiedad-depresión en adolescentes y jóvenes adultos.This study explores the relationships of self-control with age and psychological maladjustment in adolescents and young adults. The sample consisted of 1,600 randomly selected Spanish adolescents and young adults, aged 12-34 years ( M = 22.28, SD = 6.94). Measures of self-control, Internet addiction, and anxiety-depressive symptoms were administered. Control variables included age and sex. Results indicated that adolescents between 15 and 19 years old showed the lowest self-control scores, while older participants showed greater scores. Low scores in self-control were significantly associated with greater substance consumption, more anxiety-depression symptoms, and higher scores on the Internet addiction scale. Also, participants with high scores on the addiction scale scored lower on self-control. These results evidence associations between self-control and some emotional-behavioral problems, and suggest the importance of promoting self-control to prevent Internet addiction, substance consumption, and anxiety-depression in adolescents and young adults.Ministerio de Economía y Competitividad PSI 2015-64211-RConsejería de Salud y Asuntos Sociales CONV2010-00

Ecografía transrectal, tacto rectal y PSA en el diagnóstico del cáncer de próstata en el área de Madrid análisis de efectividad

Tesis de la Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Cirugía II, leída el 02-02-2001Depto. de CirugíaFac. de MedicinaTRUEpu

Ecografía transrectal, tacto rectal y PSA en el diagnóstico del cáncer de próstata en el área de Madrid análisis de efectividad

Tesis de la Universidad Complutense de Madrid, Facultad de Medicina, Departamento de Cirugía II, leída el 02-02-2001Depto. de CirugíaFac. de MedicinaTRUEpu

Formation of photosystem II reaction centers that work as energy sinks in lichen symbiotic Trebouxiophyceae microalgae

21 p.Lichens are poikilohydric symbiotic organisms that can survive in the absence of water. Photosynthesis must be highly regulated in these organisms, which live under continuous desiccation-rehydration cycles, to avoid photooxidative damage. Analysis of chlorophyll a fluorescence induction curves in the lichen microalgae of the Trebouxiophyceae Asterochloris erici and in Trebouxia jamesii (TR1) and Trebouxia sp. (TR9) phycobionts, isolated from the lichen Ramalina farinacea, shows differences with higher plants. In the presence of the photosynthetic electron transport inhibitor DCMU, the kinetics of Q(A) reduction is related to variable fluorescence by a sigmoidal function that approaches a horizontal asymptote. An excellent fit to these curves was obtained by applying a model based on the following assumptions: (1) after closure, the reaction centers (RCs) can be converted into "energy sink" centers (sRCs); (2) the probability of energy leaving the sRCs is very low or zero and (3) energy is not transferred from the antenna of PSII units with sRCs to other PSII units. The formation of sRCs units is also induced by repetitive light saturating pulses or at the transition from dark to light and probably requires the accumulation of reduced Q(A), as well as structural changes in the reaction centers of PSII. This type of energy sink would provide a very efficient way to protect symbiotic microalgae against abrupt changes in light intensity.Ministerio de Ciencia e InnovaciónMinisterio de Economía y CompetitividadGeneralitat ValencianaUniversidad de AlcaláComunidad de Madri

Demographic, social, and economic factors of internalizing problems in referred and non-referred adolescents

Depressive symptoms and suicidal ideation are common internalizing problems during adolescence. Numerous studies have explored the role of certain demographic, social, and economic factors in their development in referred or non-referred adolescents, but not simultaneously in both groups. In this study, we examined the association between age, gender, parents’ educational level, and socioeconomic status (SES) and depressive symptoms and suicidal ideation in a referred group (n = 211) and a non-referred (n = 1401) group of adolescents. We also examined the moderating role that these factors play in the relationships between both internalizing problems. The results showed: higher levels of depressive symptoms and suicidal ideation in the referred group; an increase in both problems during early-to-middle adolescence in the non-referred group; an association between low SES and suicidal ideation in both groups; an association between low father’s education level and depressive symptoms in the non-referred group; and no gender differences in either of these two internalizing problems. The moderation analyses showed that age, in referred adolescents, and SES, in non-referred adolescents, moderated the relationship between depressive symptoms and suicidal ideation. This study contributes to the identification of groups of vulnerable adolescents that could constitute the target populations of preventive programs.Universidad de Sevill

The response of Asterochloris erici (Ahmadjian) Skaloud et Peksa to desiccation: a proteomic approach

18 p.The study of desiccation tolerance of lichens, and of their chlorobionts in particular, has frequently focused on the anti-oxidant system that protects the cell against photo-oxidative stress during dehydration/rehydration cycles. In this study, we used proteomic and transcript analyses to assess the changes associated with desiccation in the isolated phycobiont Aste-rochloris erici. Algae were dried either slowly (5?6 h) or rapidly (<60 min), and rehydrated after 24 h in the desiccated state. To identify proteins that accumulated during the drying or rehydration processes, we employed two-dimensional (2D) difference gel electrophoresis (DIGE) coupled with individual protein identi?cation using trypsin digestion and liquid chromatography-tandem mass spectrometry (LC-MS/MS). Proteomic analyses revealed that desiccation caused an increase in relative abundance of only 11?13 proteins, regard-less of drying rate, involved in glycolysis, cellular protection, cytoskeleton, cell cycle, and targeting and degradation. Tran-scripts of ?ve Hsp90 and two b-tubulin genes accumulated primarily at the end of the dehydration process. In addition, transmission electron microscopy (TEM) images indicate that ultrastructural cell injuries, perhaps resulting from physical or mechanical stress rather than metabolic damage, were more intense after rapid dehydration. This occurred with no major change in the proteome. These results suggest that desiccation tolerance of A. erici is achieved by constitu-tive mechanisms.Ministerio de Ciencia e InnovaciónGeneralitat ValencianaUnited States Department of Agricultur