Effect of Zn doping on the Magneto-Caloric effect and Critical Constants of Mott Insulator MnV2O4

X-ray absorption near edge spectra (XANES) and magnetization of Zn doped MnV2O4 have been measured and from the magnetic measurement the critical exponents and magnetocaloric effect have been estimated. The XANES study indicates that Zn doping does not change the valence states in Mn and V. It has been shown that the obtained values of critical exponents \b{eta}, {\gamma} and {\delta} do not belong to universal class and the values are in between the 3D Heisenberg model and the mean field interaction model. The magnetization data follow the scaling equation and collapse into two branches indicating that the calculated critical exponents and critical temperature are unambiguous and intrinsic to the system. All the samples show large magneto-caloric effect. The second peak in magneto-caloric curve of Mn0.95Zn0.05V2O4 is due to the strong coupling between orbital and spin degrees of freedom. But 10% Zn doping reduces the residual spins on the V-V pairs resulting the decrease of coupling between orbital and spin degrees of freedom.Comment: 19 pages, 9 Figures. arXiv admin note: substantial text overlap with arXiv:1311.402

Defining periodontology in era’s

It has been very nicely quoted by Ambroise Paré that ‘’There are five duties of surgery: to remove what is superfluous, to restore what has been dislocated, to separate what has grown together, to reunite what has been divided, and to redress the defects of nature.1 Ambroise pare in the year 1537 gave rise to a revolution in surgical techniques in the medical field. Defining surgery at the 21st century has been only possible by his constant dedication and hard work. Surgery has been defined as the act and art of treating diseases or injuries by manual operation. If this broad definition is used, nearly all periodontal treatment, from hard or soft tissue curettage through osseous surgical procedures, falls under the heading of "periodontal surgery". In basic term "periodontal surgery" is specified only till surgical manipulations of periodontal soft tissues and bone and not carrying out debridement and root planning.

Serum osteocalcin levels compared with cervical maturational stages as growth indicators: An in-vivo study

OBJECTIVE: To determine whether serum osteocalcin levels can be used as a marker for assessing skeletal maturity. MATERIALS AND METHODS: The sample consisted of 60 patients aged 08-20 years (30 males, 30 females)  reporting to Department of Orthodontics and dentofacial orthopedics, and Department of Pedodontics ,Faculty of dental sciences , Ramaiah university of Applied sciences , Bangalore. Lateral cephalometric radiographs were obtained from all the subjects. Cervical staging of orthodontic patients satisfying the inclusion criteria were evaluated on their respective lateral cephalograms by using the Hassel and Farman method. After cervical vertebral maturation evaluation, 60 subjects selected for the study from the screened patients were grouped into 6 cervical stage (CS) groups of 10 per group (5 males, 5 females). 1ml blood sample was collected from each patient after taking informed consent. The collected blood was centrifuged for 20 min at room temperature and then stored at -20°C until analysis. The serum samples were subjected to ELISA test for determining levels of Osteocalcin.&nbsp

Study on Drug Resistant Pulmonary Tuberculosis using Line Probe Assay in a Tertiary Care Hospital from Eastern India

Introduction: Pulmonary Tuberculosis (PTB) is a major public health issue globally, all age groups in community are at high risk to become get infected. Multidrug Resistant (MDR) and extensively drug resistant Mycobacterium tuberculosis is increasing day by day, which is an alarm for policy maker to improve the policy. Success of any Tuberculosis (TB) control programs depends on availability of accurate data regarding TB. Aim: To know the resistant profile of Mycobacterium tuberculosis causing PTB by using Line Probe Assay (LPA). Materials and Methods: It is a laboratory based observational study conducted in Department of Microbiology, IGIMS and TBDC, Bihar, India between January 2016 to December 2016. Sputum specimens were collected from all clinically suspected cases of TB. All specimens were subjected to smear microscopy, conventional culture and LPA. Standard operating protocols were followed for all the techniques. Results: Totally 1772 sputum samples were collected during study period, positive for smear microscopy, conventional culture and LPA were 54%, 66% and 72% respectively. All smear positive isolates were positive by LPA, whereas only 840 by conventional culture. Among the smear negative isolates 309 were positive by LPA and 336 by conventional culture method. In LPA negative isolates 73 cases were positive by conventional culture methods. Out of 1272 LPA positive isolates 249 patient were diagnosed as PTB due to resistant strains. Among resistant isolates 60.64% were identified as both rifampicin and isoniazid resistant, whereas 21.68% and 17.67% was rifampicin and isoniazid mono resistant respectively. Conclusion: We found that LPA can be a good diagnostic tool for early diagnosis of mono-resistant as well as MDR TB. To control the transmission of TB in community, control programs should be followed and early diagnosis of drug resistant TB must be ensured

Highly Conducting and Stable Partial Fluorinated Polymer–Silica-Based Anion Exchange Membrane for Alkaline Fuel Cells

Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) was defluorinated in the presence of alkali, and 4-vinyl benzyl chloride (VBC) was grafted by free radical copolymerization in the presence of an initiator to obtain PVDF-co-HFP-g-VBC. Then, 1-methylimidazole-tethered PVDF-co-HFP-g-VBC was synthesized for architecting the partial fluorinated anion exchange membrane (AEM). To improve essential membrane properties such as conductivity and ion exchange capacity (cation charge density), silica precursor 3-aminopropyl trimethoxysilane was incorporated in the polymer matrix. Prepared AEMs with different structural features were studied for morphology, ion-exchange capacity, water uptake, conductivity, and stability compared to other commercial AEMs. The reported PVIM-2.5-Si membrane, with quaternary ammonium and imidazolium groups, was resistant to alkaline degradation due to the non-availability of β-hydrogen and negligible chance of nucleophilic (SN2) attack. The suitably assessed PVIM-2.5-Si AEM shows 1.04 V open circuit voltage, corresponding to 294.15 mW cm–2 power density at 555 mA cm–2 current density, in an alkaline membrane fuel cell application