Terahertz spectroscopic evidence of electron correlations in SrVOepitaxial thin films.

Electron correlation in transition metal oxides (TMOs) is an intriguing topic in condensed matter physics, revealing a wide variety of exotic physical properties. Investigating low-energy carrier dynamics by terahertz (THz) spectroscopy is an efficient route to obtain the essential insights into electron correlation. In the present study, THz-time-domain spectroscopy is employed to probe electron correlation in SrVOepitaxial thin films.

A randomized, controlled trial of comparison of a continuous femoral nerve block (CFNB) and continuous epidural infusion (CEI) using 0.2% ropivacaine for postoperative analgesia and knee rehabilitation after total knee arthroplasty (TKA).

Background And Aims: Postoperative pain relief following total knee arthroplasty (TKA) is a major concern as it will help to achieve an effective functional outcome. The present study was conducted to compare continuous femoral nerve block (CFNB) and continuous epidural infusion (CEI) techniques using ropivacaine.

Material And Methods: Forty patients were randomly allocated into group F and group E to receive 0.

A Room-Temperature Ferroelectric Ferromagnet in a 1D Tetrahedral Chain Network.

Ferroelectricity occurs in crystals with broken spatial inversion symmetry. In conventional perovskite oxides, concerted ionic displacements within a 3D network of transition-metal-oxygen polyhedra (MO ) manifest spontaneous polarization. Meanwhile, some 2D networks of MO foster geometric ferroelectricity with magnetism, owing to the distortion of the polyhedra.

Directing Oxygen Vacancy Channels in SrFeO Epitaxial Thin Films.

Transition-metal oxides (TMOs) with brownmillerite (BM) structures possess one-dimensional oxygen vacancy channels (OVCs), which play a key role in realizing high ionic conduction at low temperatures. The controllability of the vacancy channel orientation, thus, possesses a great potential for practical applications and would provide a better visualization of the diffusion pathways of ions in TMOs. In this study, the orientations of the OVCs in BM-SrFeO are stabilized along two crystallographic directions of the epitaxial thin films.

Topotactic Metal-Insulator Transition in Epitaxial SrFeO Thin Films.

Topotactic phase transformation enables structural transition without losing the crystalline symmetry of the parental phase and provides an effective platform for elucidating the redox reaction and oxygen diffusion within transition metal oxides. In addition, it enables tuning of the emergent physical properties of complex oxides, through strong interaction between the lattice and electronic degrees of freedom. In this communication, the electronic structure evolution of SrFeO epitaxial thin films is identified in real-time, during the progress of reversible topotactic phase transformation.

A Clinical Study to Examine the Effect of Complete Denture on Head Posture/Craniovertical Angle.

Introduction: Edentulous patients show some significant changes in ridge relationship caused by resorption of alveolar ridge. The changes are characterized by an upward rotation of mandible, increase in mandibular prognathism that ultimately results in change of natural head posture.

Aim: This clinical study was planned to know the effect of complete denture on head posture in different age groups of Indian completely edentulous population, after placement of complete denture at various time intervals.

Universal electronic structure of polar oxide hetero-interfaces.

The electronic properties of NdGaO3/SrTiO3, LaGaO3/SrTiO3, and LaAlO3/SrTiO3 interfaces, all showing an insulator-to-metal transition as a function of the overlayer-thickness, are addressed in a comparative study based on x-ray absorption, x-ray photoemission and resonant photoemission spectroscopy. The nature of the charge carriers, their concentration and spatial distribution as well as the interface band alignments and the overall interface band diagrams are studied and quantitatively evaluated. The behavior of the three analyzed heterostructures is found to be remarkably similar.

Photoresponse dynamics in amorphous-LaAlO3/SrTiO3 interfaces.

The time-resolved photoconductance of amorphous and crystalline LaAlO3/SrTiO3 interfaces, both hosting an interfacial 2-dimensional electron gas, is investigated under irradiation by variable-wavelengths, visible or ultraviolet photons. Unlike bare SrTiO3 single crystals, showing relatively small photoconductance effects, both kinds of interfaces exhibit an intense and highly persistent photoconductance with extraordinarily long characteristic times. The temporal behaviour of the extra photoinduced conductance persisting after light irradiation shows a complex dependence on interface type (whether amorphous or crystalline), sample history and irradiation wavelength.

The road to radiation protection: a rocky path.

Radiation has intrigued us with its magnificent properties of imaging and healing. But this discovery, like many others, came with a heavy price. The pioneers of this form of energy themselves often succumbed to its devastating effects and hence, paved a way for future generations to be wary of it, while continuing to use it.

Stress distribution among periodontally compromised abutments: A comparative study using three-dimensional finite element analysis.

Aims: The aim of the study was to evaluate the stress distribution patterns in teeth and supporting structures of fixed prosthesis and design modifications in a fixed prosthesis with either normal or reduced bone support of an additional abutment. Study was also undertaken to disprove Ante's law.

Materials And Methods: Main models and variations of main models (modification 1, 2, 3, 4, 5, 6, 7, 8) were subjected to 200 N at angulations of 90° and 15° on functional cusps.

Fasting plasma homocysteine levels are increased in young patients with acute myocardial infarction from Western India.

Background: Fasting hyperhomocysteinemia is positively associated with atherothrombosis and acute myocardial infarction in several prospective and retrospective studies. In India folic acid deficiency is not uncommon, and subclinical folic acid deficiency is known to cause hyperhomocysteinemia without thrombocytopenia.

Objective: To observe the prevalence of plasma hyperhomocysteinemia in a cohort of patients with acute myocardial infarction after 2 weeks of oral folic acid therapy.

Combination of thrombophilia markers in acute myocardial infarction of the young.

Background: The pathogenesis of arterial thrombotic disease involves multiple genetic and environmental factors related to atherosclerosis and thrombosis. But, there have been very few studies in India which have investigated some of the thrombophilia markers.

Aim: To look for combined thrombophilia in MI patients.

Frequency distribution of antigens in the human platelet antigen-1 system in the western Indian population.

Background: Neonatal alloimmune thrombocytopenic purpura (NAITP) occurring because of fetomaternal incompatibility in the human platelet antigen-1 (HPA-1) system is increasingly being detected worldwide. Several studies have reported the frequency and distribution of HPA-1 alleles in different countries and ethnic populations. A paucity of data regarding the frequency of the antigens in the HPA-1 system in the Indian population prompted an undertaking of this study.