Micro Fuel Cell Testbench

The Micro Fuel Cell Testbench is a product in development that is intended for use in the laboratory environment for rigorous testing of novel direct methanol fuel cells (DMFCs). Additionally, the MFC Testbench will be able to operate as a stand-alone unit during tradeshows. The main testing operations of the device will include monitoring the operating voltage and current of the DMFC in response to variable load. The unit will also monitor the ambient temperature and humidity while the fuel cell is operating

Additively manufactured porous scaffolds by design for treatment of bone defects

There has been increasing attention to produce porous scaffolds that mimic human bone properties for enhancement of tissue ingrowth, regeneration, and integration. Additive manufacturing (AM) technologies, i.e., three dimensional (3D) printing, have played a substantial role in engineering porous scaffolds for clinical applications owing to their high level of design and fabrication flexibility. To this end, this review article attempts to provide a detailed overview on the main design considerations of porous scaffolds such as permeability, adhesion, vascularisation, and interfacial features and their interplay to affect bone regeneration and osseointegration. Physiology of bone regeneration was initially explained that was followed by analysing the impacts of porosity, pore size, permeability and surface chemistry of porous scaffolds on bone regeneration in defects. Importantly, major 3D printing methods employed for fabrication of porous bone substitutes were also discussed. Advancements of MA technologies have allowed for the production of bone scaffolds with complex geometries in polymers, composites and metals with well-tailored architectural, mechanical, and mass transport features. In this way, a particular attention was devoted to reviewing 3D printed scaffolds with triply periodic minimal surface (TPMS) geometries that mimic the hierarchical structure of human bones. In overall, this review enlighten a design pathway to produce patient-specific 3D-printed bone substitutions with high regeneration and osseointegration capacity for repairing large bone defects

Reconstruction of Buccal Mucosa, Upper and Lower Lip Defect Using Free Radial Forearm Flap with Palmaris Longus Tendon: A Case Presentation

Introduction: Advanced lip carcinomas can invade adjacent structures. Performing surgery for these cancers will lead to defects in this anatomically and functionally important area and will cause post-op difficulties such as drooling, speech alterations and aesthetic considerations, if not properly managed. Case Report: In this study, we will introduce a radial forearm free flap with palmaris longus tendon to reconstruct a defect of a large lower lip carcinoma. Our patients was a male in the 7th decade of life with an advanced lower lip carcinoma invading the full thickness of the buccal mucosa, left commissure and the left third of the upper lip. Resection was performed with adequate margins; checked by frozen sections and radical modified neck dissection was also performed on the left side. Free radial forearm flap with palmaris longus tendon was harvested and anastomosed in the neck. Four months after surgery commissurroplasty was done and the flap volume reduced Conclusion: The radial forearm free flap with palmaris longus tendon provides a good functional lip with a reasonable aesthetics in our patient. The patient was satisfied with the result and there were no functional complaints such as drooling reported by him. We think that this flap could be a flap of choice for reconstruction of the large, full thickness lip defects

Advanced hydrogels as exosome delivery systems for osteogenic differentiation of mscs: Application in bone regeneration

10.3390/ijms22126203International Journal of Molecular Sciences2212620