Alveolar Bone Regeneration Via Utilization of Nanohydroxyapatite Scaffolds: A Review

The complete architectural and functional rehabilitation of periodontium owes to the integrity of alveolar bone. The inherent shortcomings of traditional gold standard regenerative procedures like autografting, xenografting, allografting and alloplasting lead to the evolutionary combination of Tissue Engineering/Regenerative Medicine (TE/RM) and nanotechnology for bone repair. Nanotechnology enables the fabrication of either nanoparticles, nanofibers or nanocomposites based on three-dimensional scaffolds. However, it will incorporate vital cells and growth factors in various combinations, to simulate a conducive oral environment of the extracellular matrix (ECM) and empower cells in the bone to regulate in-vivo osteogenesis. The advantageous combination of structural similarity of nanohydroxyapatite (nHA) Scaffolds to the alveolar bone with favorable particle size, response rate, tissue factors and bio factor, makes it attractive for TE/RM. Relevant keywords from 2010-2021 studies were used to retrieve data from “PubMed” and “Google Scholar”. This review aims to summarize the cumulative knowledge of commercially available nanohydroxyapatite scaffolds for utilization in alveolar bone augmentation, regeneration of implant osteointegration by their fabrication techniques, advantages, components, types, interaction with various components and particular application of each type for in vivo alveolar bone regeneration. Therefore, nHA scaffolds possess significant osteoconductive and osteoinductive effects on structural similarities to the composition, adhesion and differentiation of bone-forming cells. Keywords: Scaffolds; Tissue Engineering; Nano-Hydroxyapatite, Bone Regeneration; Nanotechnology

Experimental Analysis of Catalytic Gasification of Polyethylene

Over the last century there has been a global interest in reducing/recycling waste material as well as creating energy from renewable and more eco-friendly sources. Catalytic gasification is one effective method that can promote low-temperature conversion of solid waste to energy, also referred to as “gasification”. The gas mixture produced by gasification of long-chain polymers using ruthenium (or platinum) catalysts consists of hydrogen, methane, carbon monoxide, carbon dioxide, and water. Product mixtures of gasification experiments were analyzed by Gas Chromatography (GC) and post-processed using statistical analysis. Using fundamental reactor design equations along with stoichiometric calculations yielded the percent gasified as well as the reaction selectivity of the process. The solid residues containing ashes, char, ruthenium, and polyethylene unreacted were analyzed in a Differential Scanning Calorimetry (DSC) and a Scanning Electron Microscope (SEM) to identify its components. Quantification of the DSC spectra was used to correlate the thermal characterization of the residues with the unconverted (or non-gasified) after the reaction was quenched. Lastly, the SEM provided information on the microstructure of the residues, their atomic composition, and preliminary assessment of the possibility of catalyst recovery. These results are next to be used in formulating a kinetic mechanism for the liquid- phase oxidation, and thus complete a model of catalytic gasification amenable for scaling-up the process to continuous operation.https://engagedscholarship.csuohio.edu/u_poster_2015/1046/thumbnail.jp

Does anticholinergics drug burden relate to global neuro-disability outcome measures and length of hospital stay?

Primary objective: To assess the relationship between disability, length of stay (LOS) and anticholinergic burden (ACB) with people following acquired brain or spinal cord injury. Research design: A retrospective case note review assessed total rehabilitation unit admission. Methods and procedures: Assessment of 52 consecutive patients with acquired brain/spinal injury and neuropathy in an in-patient neuro-rehabilitation unit of a UK university hospital. Data analysed included: Northwick Park Dependency Score (NPDS), Rehabilitation complexity Scale (RCS), Functional Independence Measure and Functional Assessment Measure FIM-FAM (UK version 2.2), LOS and ACB. Outcome was different in RCS, NPDS and FIM-FAM between admission and discharge. Main outcomes and results: A positive change was reported in ACB results in a positive change in NPDS, with no significant effect on FIM-FAM, either Motor or Cognitive, or on the RCS. Change in ACB correlated to the length of hospital stay (regression correlation = −6.64; SE = 3.89). There was a significant harmful impact of increase in ACB score during hospital stay, from low to high ACB on NPDS (OR = 9.65; 95% CI = 1.36–68.64) and FIM-FAM Total scores (OR = 0.03; 95% CI = 0.002–0.35). Conclusions: There was a statistically significant correlation of ACB and neuro-disability measures and LOS amongst this patient cohort

Resistance and the "Post-Recognition" Turn in Organizations

I will draw on the contributions of Courpasson (2016) and Hardy (in press) to reflect on the nature of resistance in contemporary organizations and extend the discussion by focusing on why and how actors might resist today. In particular, I propose that some types of resistance are motivated by what I label post-recognition politics rather than traditional struggles to be recognized, heard, and listened to. Hence the prominent theme of exit, escape, and social independence in emancipatory discourses designed to refuse work and employment today

The poetics of justice: aphorism and chorus as modes of anti-racism

This article revisits accounts of the black radical tradition as a critique and alternative to institutionalised modes of knowledge and learning, reprising Harney and Moten’s concept of the undercommons to think about the constraints of the university and the possibility for thinking differently together. The deployment of linguistic and conceptual difficulty as a tactic of political speech is linked to Sutherland’s discussion of Marx’s poetics, leading to the suggestion that the repetitive interspersing of poetic or theoretical fragments in the public speech of social justice actors operates to create a shared rhythm that establishes mutuality. The piece ends with a discussion of the refashioning of Audre Lorde as a voice punctuating the assertion of anti-racist and intersectional consciousness via social media

Strike, occupy, transform! Students, subjectivity and struggle

This article uses student activism to explore the way in which activists are challenging the student as consumer model through a series of experiments that blend pedagogy and protest. Specifically, I suggest that Higher Education is increasingly becoming an arena of the postpolitical, and I argue that one of the ways this student-consumer subjectivity is being (re)produced is through a series of ‘depoliticisation machines’ operating within the university. This article goes on to claim that in order to counter this, some of those resisting the neoliberalisation of higher education have been creating political-pedagogical experiments that act as ‘repoliticisation machines’, and that these experiments countered student-consumer subjectification through the creation of new radical forms of subjectivity. This paper provides an example of this activity through the work of a group called the Really Open University and its experiments at blending, protest, pedagogy and propaganda