Publications by authors named "R J Rangel"
Mercury is widely known for its detrimental effects on living organisms, whether in its elemental or bonded states. Recent comparative studies have shed light on the biochemical implications of mercury ingestion, both in low, persistent concentrations and in elevated acute dosages. Studies have presented models that elucidate how mercury disrupts healthy cells.
View Article and Find Full Text PDFBackground: The congenital absence of the left atrial appendage (LAA) is an extremely rare anatomical anomaly, with only 23 cases documented in medical literature. The LAA plays a critical role in thrombus formation, particularly in patients with atrial fibrillation (AF), thus impacting stroke prevention strategies and the management of anticoagulation.
Case Summary: We report a 48-year-old male with a 2-year history of hypertension and prior episodes of tachycardic palpitations, who presented with AF and chest pain.
Mental health, historically framed as the mere absence of mental health disorders, has led to unequal treatment, resulting in more persons living with mental health challenges. This limited framing of mental health, often woven into policy and practices across a broad range of governance structures, programs, and services, has led to individual and collective discrimination and structural and systemic inequities, culminating in the infringement of fundamental human rights. Using a broader framework for viewing mental health (e.
View Article and Find Full Text PDFArticle Synopsis
- Researchers are exploring the use of nanostructured metal oxide surfaces to enhance the biocompatibility and bioactivity of biodegradable iron-based materials.
- Iron oxide nanotubes were successfully synthesized on pure iron through an anodic oxidation process, creating a layer that primarily consists of α-FeO with small diameters (60-70 nm).
- In vitro studies revealed that this nanotube layer did not negatively affect cell viability or morphology, and actually improved metabolic activity in human osteosarcoma cells, indicating potential for biomedical applications like stents or implants.
Article Synopsis
- * Two surgical techniques were used: an "iceberg" connective tissue graft and a "garage" approach with a strip gingival graft to enhance gum volume and improve aesthetics.
- * The final results showed excellent soft tissue appearance, thickness, and symmetry, leading to high patient satisfaction; more studies are suggested to assess this new technique's effectiveness.