Magnetic anomalies over the Andaman Islands and their geological significance

The Andaman Islands form part of the outer-arc accretionary sedimentary complex belonging to the Andaman–Sumatra active subduction zone. The islands are characterized by thick cover of Neogene sediments along with exposed ophiolite rocks at few places. A regional magnetic survey was carried out for the first time over the Andaman Islands with a view to understand the correlation of anomaly signatures with surface geology of the islands. The residual total field magnetic anomaly maps have revealed distinct magnetic anomalies having intermediate to high amplitude magnetic signatures and correlate with the areas over/close to the exposed ophiolite rocks along the east coast of north, middle and the south Andaman Islands. The 2D modelling of magnetic anomalies along selected E–W profiles across the islands indicate that the ophiolite bodies extend to a depth of about 5–8 km and spatially correlate with the mapped fault/thrust zones

A morphomertic study of dry human typical thoracic vertebral body in coastal region, Andhra Pradesh

Background: The frequent surgical interventions of the thoracic spine are more common due to a wide array of traumatic, degenerative, and neoplastic diseases. For successful surgical management of these conditions, detailed anatomical knowledge of the thoracic vertebrae is required. Previous studies in the past about morphometry of thoracic vertebrae mainly focused on pedicle diameters and their angulations. The vertebral body was not studied particularly in the coastal region, Andhra Pradesh which is the reason the present study has given importance to the morphometry of the vertebral body. Aim was to measure the various parameters of the vertebral body in typical thoracic vertebrae.Methods: 82 dry human typical thoracic vertebrae from the department of anatomy, Andhra Medical College, Visakhapatnam were studied for the various morphometric parameters.Results: The antero posterior distance of the vertebral body in typical thoracic vertebrae ranged from 14.5-27.5 mm with a mean of 21.77 mm. The vertebral body superior transverse diameter ranged from 18.1-38.7 mm with a mean of 28.22 mm. The vertebral body inferior transverse diameter ranged from 22.6-41.2 mm with a mean of 31.3 mm. The anterior height of the body ranged from 10.2-24.1 mm with a mean of 18.17 mm. The right and left lateral height of the body ranged from 9.0-24.7 mm with a mean of 18.4 mm.Conclusions: The results provide information for more accurate modelling and design of vertebral body implants and instrumentations for the Indian population

Effect of Fe doped and capping agent – Structural, optical, luminescence, and antibacterial activity of ZnO nanoparticles

Zinc oxide nanoparticles (ZnO NPs) are indispensable materials for spectral and optical phenomena, prepared by a chemical precipitation method. We studied their properties resulting from different dopants in the nanoscale. The samples' structure, texture, energy band, and photoluminescence were examined using XRD, TEM, FTIR, PL, and UV–VIS spectroscopy. XRD shows the single hexagonal Wurtzite with crystallite sizes from 10.1 to 17.8 nm and the spherical shape particles. The octahedral sites at 470–489 cm−1 and the tetrahedral sites at 616 cm−1 were observed in the FTIR studies. PL showed a wider bandgap, better UV emission, and decreased defect density of the Fe doped than that of the pristine one. Fe-doped ZnO NPs are more active than pristine ZnO NPs for their quenching or absorbing properties, indicating their antibiotic properties