Albumin Protein Impact on Early-Stage In Vitro Biodegradation of Magnesium Alloy (WE43)

Mg and its alloys are promising biodegradable materials for orthopedic implants and cardiovascular stents. The first interactions of protein molecules with Mg alloy surfaces have a substantial impact on their biocompatibility and biodegradation. We investigate the early-stage electrochemical, chemical, morphological, and electrical surface...

Hydrogen Storage on Porous Carbon Adsorbents: Rediscovery by Nature-Derived Algorithms in Random Forest Machine Learning Model

Porous carbons as solid adsorbent materials possess effective porosity characteristics that are the most important factors for gas storage. The chemical activating routes facilitate hydrogen storage by adsorbing on the high surface area and microporous features of porous carbon-based adsorbents. The present research proposed to predict H<sub...

Development and optimization of trivalent chromium electrodeposit on 304L stainless steel to improve corrosion resistance in chloride-containing environment

In this study, we developed and optimized a trivalent chromium coating electrodeposited on 304L stainless steel (SS) from a Cr-trivalent bath. The results reveal that the Cr coatings at all bath temperatures except for 80 °C showed clusters of polyhedral grains, however, the grain sizes decreased with an increase in bath temperature. Also,...

Challenges and Strategies for Optimizing Corrosion and Biodegradation Stability of Biomedical Micro- and Nanoswimmers: A Review

The last two decades have witnessed the emergence of micro- and nanoswimmers (MNSs). Researchers have invested significant efforts in engineering motile micro- and nanodevices to address current limitations in minimally invasive medicine. MNSs can move through complex fluid media by using chemical fuels or external energy sources such as...

Biodegradation of Oxide Nanoparticles in Apoferritin Protein Media: A Systematic Electrochemical Approach

Functional oxide nanoparticles are extensively utilized in the last decades for biomedical purposes due to their unique functional properties. Nevertheless, their biodegradation mechanism by biological species, particularly by proteins at oxide/protein interfaces, still remains limited. Here, a systematic approaches is provided to investigate...

Morphological and Surface Potential Characterization of Protein Nanobiofilm Formation on Magnesium Alloy Oxide: Their Role in Biodegradation

The formation of a protein nanobiofilm on the surface of degradable biomaterials such as magnesium (Mg) and its alloys influences metal ion release, cell adhesion/spreading, and biocompatibility. During the early stage of human body implantation, competition and interaction between inorganic species and protein molecules result in a complex...

Formatief toetsen van begripsontwikkeling in ontwerponderwijs: Een onderzoek naar instrumenten en activiteiten voor authentieke formatieve toetsing tijdens ontwerpprojecten bij scheikunde en informatica

Professioneleontwerpersmakentijdenseenontwerpprocesvoortdurendtussenproductenzoalsschema’s,visualisatiesenpresentaties.InditdoorNROgesubsidieerdeprojectontdektendeonderzoekersdatzulkeauthentieketussenproductenvanleerlingenzichtbaarkunnenmakenwatzijaanvakkennisopdoentijdenshetwerkenaaneenontwerpopdracht...

Characterization of the passive layer on ferrite and austenite phases of super duplex stainless steel

In this study, we report on a combined microscopic, analytical and electrochemical characterization of the nanoscopic passive layer on a tungsten‑molybdenum-containing super duplex stainless steel. We used scanning transmission electron microscopy/energy dispersive X-ray spectroscopy, scanning Kelvin probe force microscopy, scanning tunneling...

A Design Framework for Personal Learning Environments

The purpose of our research was to develop a PLE (personal learning environment) design framework for workplace settings. By doing such, the research has answered this research question, how should a technology-based personal learning environment be designed, aiming at supporting learners to gain control over their learning at the workplace? We...

Investigating relationship between self- and co-regulatory learning processes in a workplace e-learning system

While supporting regulatory learning processes in work environments is increasingly becoming important, there is not a clear picture of the interaction between self- and coregulatory processes performed by learners in workplace e-learning systems. In this paper, by following a design-based research methodology, we develop a theory-based...

A Pedagogy-driven Framework for Integrating Web 2.0 tools into Educational Practices and Building Personal Learning Environments

While the concept of Web 2.0 based Personal Learning Environments (PLEs) has generated significant interest in educational settings, there is little consensus regarding what this concept means and how teachers and students can develop and deploy Web 2.0 based PLEs to support their teaching and learning activities. In this paper a conceptual...

Investigating teachers' perception about the educational benefits of Web 2.0 personal learning environments

Implementing personal learning environments (PLEs) in educational settings is a challenging and complex process. Teachers as the main agents of change in their classroom settings need support in designing and implementing these new learning environments and integrating them into the educational process. In this paper, we propose a model to...

Designing and implementing PLEs in a secondary school using Web2.0 tool

Although current and upcoming web technologies offer all kinds of new opportunities to support student-centered learning, there does not exist yet a clear roadmap to integrate these technologies into teaching and learning processes. In this paper a model is introduced in order to develop Personal Learning Environements (PLEs) consisting of Web2...