Non-isothermal crystallization kinetics of chalcogenide Se79Te20Pb1 glass using differential scanning calorimetry technique

In the present paper, the overall amorphous-crystallization transformation kinetics of chalcogenide Se79Te20Pb1 alloy has been reported using differential scanning calorimetry technique under non-isothermal conditions at three different heating rates (5, 10 and 15 °C/min). Amorphous nature of the investigated alloy is verified using X-ray diffraction. The glass transition region has been investigated using three empirical approaches and consonance of these methods has been discussed. The apparent activation energy for glass transition and crystallization region has been deduced using different methods. The Avrami exponent of the investigated alloy indicates one dimension growth of the investigated glass. The deduced values of Hruby’s parameter and fragility index indicate that amorphous alloy has been formed from good glass forming liquids

Ethnomedicinal Plants Used in the Health Care System: Survey of the Mid Hills of Solan District, Himachal Pradesh, India

The study was performed in the mid hills of the Dharampur region in Solan district of Himachal Pradesh, India. At the study site, a total of 115 medicinal plants were documented (38 trees, 37 herbs, 34 shrubs, 5 climbers, 1 fern, and 1 grass). In the study region, extensive field surveys were performed between March 2020 and August 2021. Indigenous knowledge of wild medicinal plants was collected through questionnaires, discussions, and personal interviews during field trips. Plants with their correct nomenclature were arranged by botanical name, family, common name, habitat, parts used, routes used, and diseases treated. In the present study, the predominant family was Rosaceae, which represented the maximum number of plant species, 10, followed by Asteraceae and Lamiaceae, which represented 8 plant species. The rural inhabitants of the Dharampur region in the Solan district have been using local plants for primary health care and the treatment of various diseases for a longer time. However, information related to the traditional knowledge of medicinal plants was not documented. The rural inhabitants of the Dharampur region reported that the new generation is not so interested in traditional knowledge of medicinal plants due to modernization in society, so there is an urgent need to document ethnomedicinal plants before such knowledge becomes inaccessible and extinct

Non-isothermal crystallization kinetics of chalcogenide Se₇₉Te₂₀Pb₁ glass using differential scanning calorimetry technique

498-505In the present paper, the overall amorphous-crystallization transformation kinetics of chalcogenide Se79Te20Pb1 alloy has been reported using differential scanning calorimetry technique under non-isothermal conditions at three different heating rates (5, 10 and 15 °C/min). Amorphous nature of the investigated alloy is verified using X-ray diffraction. The glass transition region has been investigated using three empirical approaches and consonance of these methods has been discussed. The apparent activation energy for glass transition and crystallization region has been deduced using different methods. The Avrami exponent of the investigated alloy indicates one dimension growth of the investigated glass. The deduced values of Hruby’s parameter and fragility index indicate that amorphous alloy has been formed from good glass forming liquids

Study of Composition Variation on Dielectric and Impedance Spectra of Tetragonal-Rhombohedral System in (1-x)BZT-(x)BCT Composites

Abstract: In present work, (1-x)[BaZr0.2Ti0.8O3]-(x)[Ba0.7Ca0.3TiO3] (BZT-BCT) (where x = 0.50, 0.60 and 0.75) were fabricated by solid-state reaction technique. Structural, dielectric and impedance properties of the synthesized composites were investigated and discussed in detail. The X-ray diffraction technique shows that all the samples possessed a double-phase polycrystalline sample with a tetragonal-rhombohedral structure. Dielectric and impedance behavior were investigated in a wide range of temperatures (room temperature (RT) - 500˚C) and frequency (100 Hz ≤f ≤ 1 MHz). A broad dielectric constant peak was observed around the phase transition temperature

Synthesis and optical properties of GdVO4: Eu3+ phosphor

In the present work, we have synthesized GdVO _4 doped Eu ^3+ using a facile sol-gel method and analysed the effect of concentration variation and annealing temperature on the optical properties. Tetragonal (I4 _1 /amd) zircon type crystal structure of the material was confirmed by x-ray diffraction (XRD) study. The photoluminescence (PL) spectra were recorded with an ultraviolet (UV) excitation of wavelength 325 nm. GdVO _4 doped Eu ^3+ (1 mol%) gives prominent red emission. This optimized sample was annealed at different temperature and as annealing temperature raises, the crystallinity of the material increases resulting in the improved emission intensity. The emission spectra of this phosphor exhibit intense peaks at wavelengths 593 nm (orange) and 618 nm (red) which corresponds to ^5 D _0 - ^7 F _1 , ^5 D _0 - ^7 F _2 transitions of Eu ^3+ ions. ^5 D _0 - ^7 F _2 , the electric dipole transition is dominant indicating that Eu ^3+ ions situated at a non-centrosymmetric site in the crystal structure. GdVO _4 : Eu ^3+ (1 mol%) annealed at 800 °C gives eminent red emission which can be further used as the potential candidate for bioimaging, lighting, temperature sensing and display devices

Relationship between histologic chorioamnionitis and genital tract cultures in pre term labour

The objective was to determine the relationship of histological chorioamnionitis (HCA) with genital tract cultures in preterm birth. Among two hundred women recruited for the study, 100 were taken as cases with gestational age between ≥28 and 37 weeks were taken as controls. Vaginal swabs were taken for culture sensitivity and vaginal smears were made for performing whiff test and heat dry gram stained smear was examined for growth of microorganisms. Histopathologic examination of the placenta was done after delivery. 49 cases and 26 controls had evidence of histological chorioamnionitis. A significant difference was observed in relation to the presence of E. coli, presence of clue cells, positive whiff test and occurrence of bacterial vaginosis in subjects with and without histological chorioamnionitis. Thus, we conclude that the presence of histological chorioamnionitis is closely related to the presence of pathogenic microorganisms in the cervicovaginal region.IMPACT STATEMENT What is already known on the subject? Histologic chorioamnionitis has been regarded to reflect amniotic fluid infection and there are studies showing an association between histologic chorioamnionitis, amniotic fluid, and subchorionic plate cultures. Nevertheless, studies of the correlation of the cervical swab cultures with intrauterine infection in preterm birth remain inconclusive. What do the results of this study add? Histologic chorioamnionitis is closely related to the presence of pathogenic microorganisms in the cervicovaginal region. What are the implications of these findings for clinical practice and/or further research? High vaginal swab cultures and gram staining of vaginal smear is useful in detecting antenatal patients who are at a higher risk for preterm labour. After detection, early intervention may be done to avoid preterm deliveries in these high-risk pregnancies

Maxillary labial frenum morphology and midline diastema among 3 to 12-year-old schoolgoing children in Sri Ganganagar city: A cross-sectional study

Introduction: Dentofacial aesthetics plays an important role in social interaction and psychological well-being because it affects how people perceive themselves and how they are perceived by society. The maxillary labial frenum is a fold of tissue, usually triangular in shape, extending from the maxillary midline area of the gingiva into the vestibule and mid portion of the upper lip. Maxillary anterior spacing or diastema is a common aesthetic complaint of patients and is frequently seen in children especially in the mixed dentition stage. Aims and Objectives: 1. To estimate the prevalence of different morphologic types of maxillary labial frenum among children of age 3 – 12 years. 2. To find out the relationship between the level of insertion of the frenum and age of the child.3. To evaluate the correlation between frenum morphology, insertion and midline diastema in children. Materials and Methodology: The direct visual method under natural light was used and the upper lip was lifted with the index finger and thumb of both hands which allowed for the observation and classification of the labial frenum morphology according to Sewerin's typology and its attachment according to Placek et al. The midline diastema was determined by measuring the distance between the midpoints of the mesial surfaces of both central incisors with the help of divider and ruler. The values were recorded in the prepared schedule. Summary and Conclusions: The presence of an abnormal frenum can be a cause in persistent midline diastemas. Tooth movement usually is deferred until eruption of the permanent canines but can begin early in certain cases with very large diastemas