Self-healing polymers typically face an enforced trade-off between repairability and mechanical properties, with a high degree of self-healing being achieved mainly by materials having low mechanical strength and stiffness. This study focuses on the development of SBR compounds that can combine together self-healing properties with the use of ground tire rubber (GTR) as alternative sustainable filler. The self-healing efficiency of GTR filled SBR compounds is compared to conventional carbon black filled compounds. The influence of the vulcanization system and the addition of silane-based coupling agents are also assessed. Results show that SBR compounds vulcanized by means of a semi-efficient sulfur based system recover around 50% of their mechanical strength, being the self-healing response related to the presence of disulfide bonds. Contrary to carbon black compounds, GTR samples present similar healing efficiency to the unfilled SBR samples, improving mechanical properties in 50%. Moreover, the coupling agent enhances even more (up to 80%) the mechanical strength of the SBR-GTR compounds without adversely affecting the healing efficiency. These results can thus be seen as a starting model material for developing new sustainable applications economically and environmentally convenient with good mechanical properties as well as healing ability.

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Objetivo: Se establece la relación entre embarazo de alto riesgo obstétrico y patología mental futura en hijos. Método: Estudio comparativo transversal cualitativo que relaciona los factores de riesgo encontrados en gestantes con los de madres de pacientes psiquiátricos atendidos en el Servicio de Psiquiatría del Niño y del Adolescente del mismo hospital. Se comparan estos dos grupos y los hallados en madres de pacientes del servicio de pediatría y un grupo control de gestantes con embarazo sin alto riesgo. Conclusión: Existe una concordancia entre gestantes de alto riesgo obstétrico y madres de pacientes con patología psiquiátrica. Recomendaciones, La concordancia entre embarazo de alto riesgo y patología psiquiátrica futura amerita diseñar sistemas de seguimiento, intervención psicoterapéutica y psico-educación en madres gestantes con estas características.

Over the last 5 decades, the fulfillment of maternity wishes in solid organ transplanted women has become a reality. Despite pregnancy contraindication in transplanted women during the early post-transplant period, such a condition can be overcome after 12 months if patients show a good clinical evolution and do not present other general pre-conceptional findings. This article presents the case report of a young female liver transplanted patient that used symptothermal method as a reliable family planning method. After her gestational contraindication was lifted, observation of biological fertility indicators and fertility-guided sexual intercourse helped her fulfill her maternity wish and conceive and carry out a healthy offspring. Based on this case and on the available bibliographic evidence, this paper reviews the potential implications of the use of this kind of approach as a safe and effective alternative to assisted reproduction technology in the management of potential infertility problems in the young female transplanted population, a population which according to literature has higher rates of unsuccessful parenthood and might also be more vulnerable to iatrogenicity of ovarian hyperstimulation process and to multiple pregnancy.