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This article explores the potential of youth transitions to explain and contextualize young people's engagements with politics. It starts with the discussion of the alleged detachment between young people and politics, recently challenged by research on alternative engagements and Do It Ourselves (DIO) politics (Pickard, Sarah. 2019. Politics, Protest and Young People. Political Participation and Dissent in the 21 Century Britain. London: Palgrave MacMillan. doi:). Then follows the discussion on the contributions which different currents on youth research have brought to the role of youth transitions in young people's engagements with politics. Youth transitions are afterwards defined as the strategic setting where intensive and plural engagements with politics may emerge if certain conditions are met. This is the context where a sense of place in the structural spectrum of inequality starts to develop and the correspondent agentic response blossoms, fostered by crucial encounters with significant others and the occurrence of critical moments. This account is brought by a qualitative approach based on the biographical records of a group of intensely mobilized young people, which retraces the individual processes of engagement made through transitions during education and from education to work, highlighting the contribution that transitional features may bring to the development of successful 'militant careers' (Filieulle, Olivier, Lilian Mathieu, and Cécile Péchu. 2009. Dictionnaire des Mouvements Sociaux. Presses de Sciences Po. doi:) and to incorporate contemporary young people's subjectivities in the political process. [ABSTRACT FROM AUTHOR]

Silk proteins have been highlighted in the past decade for tissue engineering (TE) and skin regeneration due to their biocompatibility, biodegradability, and exceptional mechanical properties. While silk fibroin (SF) has high structural and mechanical stability with high potential as an external protective layer, traditionally discarded sericin (SS) has shown great potential as a natural-based hydrogel, promoting cell–cell interactions, making it an ideal material for direct wound contact. In this context, the present study proposes a new wound dressing approach by developing an SS/SF bilayer construct for full-thickness exudative wounds. The processing methodology implemented included an innovation element and the cryopreservation of the SS intrinsic secondary structure, followed by rehydration to produce a hydrogel layer, which was integrated with a salt-leached SF scaffold to produce a bilayer structure. In addition, a sterilization protocol was developed using supercritical technology (sCO2) to allow an industrial scale-up. The resulting bilayer material presented high porosity (>85%) and interconnectivity while promoting cell adhesion, proliferation, and infiltration of human dermal fibroblasts (HDFs). SS and SF exhibit distinct secondary structures, pore sizes, and swelling properties, opening new possibilities for dual-phased systems that accommodate the different needs of a wound during the healing process. The innovative SS hydrogel layer highlights the transformative potential of the proposed bilayer system for biomedical therapeutics and TE, offering insights into novel wound dressing fabrication. [ABSTRACT FROM AUTHOR]

This study aimed to describe a support material removal protocol (SMRP) from inside the root canals of three-dimensional printed teeth (3DPT) obtained by the microcomputed tomography (microCT) of a natural tooth (NT), evaluate its effectiveness by comparing the 3DPT to NT in terms of internal anatomy and behaviour toward endodontic preparation, and evaluate if 3DPT are adequate to assess the differences between two preparation systems. After the SMRP, twenty 3DPT printed by PolyJet™ were microCT scanned before preparation and thereafter randomly assigned into two groups (n = 10). One group and NT were prepared using ProTaper Gold® (PTG), and the other group with Endogal® (ENDG). MicroCT scans were carried out after preparation, and the volume increase, volume of dentin removed, centroids, transportation, and unprepared areas were compared. For the parameters evaluated, no significant differences were found between the 3DPT and NT before and after preparation (p > 0.05), and no significant differences were found between the 3DPT PTG group and the 3DPT ENDG group (p > 0.05). It can be concluded that the SMRP described is effective in removing the support material SUP706B™. PolyJet™ is adequate for printing 3DPT. Furthermore, 3DPT printed with high-temperature RGD525™ have similar behaviour during endodontic preparation with PTG as the NT, and 3DPT can be used to compare two preparation systems. [ABSTRACT FROM AUTHOR]

In this article, the weak–strong uniqueness principle is proved for an Euler–Poisson system in the whole space, with initial data so that the strong solution exists. Some results on Riesz potentials are used to justify the considered weak formulation. Then, one follows the relative energy methodology and, in order to handle the solution of Poisson's equation, employs the theory of Riesz potentials. [ABSTRACT FROM AUTHOR]