A method for increasing the surface area of perovskite-type oxides

A method based on hydrothermal treatments is described for increasing the surface area of sintered ABO3-type perovskite oxides. Influence of hydrothermal treatments, such as water treatment at 125-300°C under autogeneous pressure and steam treatment at 350-800°C, to low surface area (or sintered) LaCoO3 and LaMnO3 perovskite oxides on their surface properties (viz. surface area, crystal size and morphology and surface La/(Co or Mn) ratio) and also catalytic activity in complete combustion of methane at different temperatures (450-600°C) has been thoroughly investigated. The hydrothermal treatments result in the activation of the perovskite oxides by increasing their surface area very markedly

Study of diffusion in copper chromite catalyst under reaction conditions

This article does not have an abstract

Spin-lattice coupling mediated giant magnetodielectricity across the spin reorientation in Ca2FeCoO5

The structural, phonon, magnetic, dielectric, and magneto dielectric responses of the pure bulk Brownmillerite compound Ca2FeCoO5 are reported. This compound showed giant magneto dielectric response (10%-24%) induced by strong spin-lattice coupling across its spin reorientation transition (150-250 K). The role of two Debye temperatures pertaining to differently coordinated sites in the dielectric relaxations is established. The positive giant magneto-dielectricity is shown to be a direct consequence of the modulations in the lattice degrees of freedom through applied external field across the spin reorientation transition. Our study illustrates novel control of magneto-dielectricity by tuning the spin reorientation transition in a material that possess strong spin lattice coupling.Comment: 7 pages, 12 figure

Peripheral Ameloblastoma: A Case Report and Review of Literature

Peripheral ameloblastoma, a rare and unusual variant of odontogenic tumour, comprises about 2–10% of all ameloblastomas. The extraosseous location is the peculiar feature of this type of tumour, which is otherwise similar to the classical ameloblastoma. This paper describes a case of peripheral ameloblastoma in a 67-year-old female affecting the lingual alveolar mucosa of the mandibular 32–34 region which was clinically diagnosed as pyogenic granuloma. This paper becomes important due to availability of all data, makeing it a well-documented case

Electronic structure of Fe (0-5 at. %) doped MoO2 thin films studied by resonant photoemission spectroscopy

The electronic structure of pulsed laser deposited Mo1-xFexO2 (x=0, 0.02 and 0.05) thin films has been investigated using resonant photoemission spectroscopy near Mo-4p absorption edge. In all the samples a broad Fano- like resonance peak at ~46 eV is observed in the whole area of the valence band which indicates the contribution of the Mo-4d states in the entire valence band region. The doping of Fe in these films leads to decrease in Mo 4d states contributing to electronic states at lower binding energy region. In addition to this, we also observe a shoulder at 4.9 eV in the valence band spectra of doped samples. It is proposed that the origin of this shoulder is due to the Fe hybridised states.Comment: 16 pages, 4 figures ,. J. Phys. Cond. Mat. (accepted

Role of hysterolaparoscopy in unexplained infertility

Background: Infertility, as defined by World Health Organization (WHO), is failure to achieve pregnancy during 1 year of regular unprotected intercourse. The objective of this study was to determine the incidence of unsuspected pathology at hysterolaparoscopy in presumed unexplained infertility, the incidence of intervention done for correcting pathology and its outcome and the importance of hysterolaparoscopy in the evaluation and treatment of infertile couples.Methods: This prospective observational study was carried out at IVF and Endoscopy centre, Department of obstetrics and gynecology at the Ruby Hall clinic, Pune from 1st November 2014 to 30th July 2016, after obtaining institutional ethical clearance and who met the inclusion and exclusion criteria. A detailed clinical history and physical examination and bimanual pelvic examination were done, following which all the patients were subjected to baseline blood investigation, 3D pelvis (TVS) and semen analysis. Day care hysterolaparoscopy was performed and systematic analysis were done.Results: The mean duration of infertility was 2 to 4 years. In our study out of 75 women 62 (82.67%) showed normal hysteroscopic findings, remaining 13 women (17.67%) showed abnormal hysteroscopic findings like cornaul blockage, intrauterine adhesions and tuberculosis endometrium. Abnormal laparoscopic findings were reported in 29.33% of which the most common pathology was endomertiosis (21.33%).Conclusions: Diagnostic Hysterolaproscopy is a safe, effective, minimally invasive, cost effective, daycare comprehensive procedure in evaluation of unexplained infertility. Apart from routine diagnostic protocol missed pathologies can be detected and this tool can be used for diagnostic as well as therapeutic intervention