Reference Temperature Dependent Thermoelastic Solid with Voids Subjected to Continuous Heat Sources

In the present article, the reference temperature dependency Lord--Shulman model of generalized thermoelasticity with voids subjected to a continuous heat source in a half-space is discussed. The Laplace transform together with eigenvalue approach technique is applied to find a closed-form solution for the physical variables viz. distribution of temperature, volume fraction field, deformation and stress field in the Laplace transform domain. The numerical inversions of those physical variables in the space-time domain are carried out by using the Zakian algorithm for the inversion of the Laplace transform. Numerical results are shown graphically and the results obtained are analyzed

Evaluation of antimicrobial sensitivity pattern of chronic suppurative otitis media in a tertiary care hospital of West Bengal, India

Background: Chronic suppurative otitis media is a common infectious disease in our country. The micro-organisms commonly causing the disease and their antibiotic sensitivity pattern is important for treatment. This study was conducted to evaluate the antimicrobial sensitivity pattern of the common microorganisms in patients with chronic suppurative otitis media in our tertiary care hospital.Methods: The study was carried out from July 2013 to December 2013 at the ENT out-patient department of a tertiary care hospital in West Bengal. 100 patients aged 18 to 60 years of either sex, with unilateral or bilateral active chronic suppurative otitis media attending the out- patient clinic were included in the study. Pus samples were collected from the discharging ears and sent for isolating the organisms and susceptibility testing.Results: A total number of 108 ear swabs were collected from the 100 recruited patients of which 15 (13.88%) were sterile and 93 (86.11%) showed presence of organisms. Pseudomonas aeruginosa 41(38%) was the commonest organism isolated, followed by Staphylococcus aureus 25(23.15%). The antimicrobial profile of the microorganisms reveals maximum sensitivity of the isolated organisms to piperacillin and levofloxacin.Conclusions: In our study, Pseudomonas aeruginosa (38%) and Staphylococcus aureus (23.15%) are the major pathogens involved in the etiology of CSOM. The isolates showed maximum sensitivity to piperacillin (41%) and levofloxacin (41%). As piperacillin is available only in parenteral form and is also costly, topical levofloxacin can be recommended in empirical treatment of CSOM

Invasive mole presenting as acute abdomen

We reporting this case as acute abdomen and admitted into the surgical ward. The patient was in shock due to hemoperitonium and emergency laparotomy done and found that it was a perforating molar pregnancy. Total hysterectomy done, five units blood transfusion done. β hCG levels regress quickly and spontaneously

Earliest use of initial prophylactic dose of magnesium sulphate (MgSO4) in severe pre-eclampsia to improve maternal and perinatal outcome, in a rural medical college, WB, India

Background: Eclampsia is one of the high risk obstetric complication throughout the world. Till today, eclampsia is one of the important cause of maternal mortality in our country. However the administration of magnesium sulphate (MgSO4) has changed the scenario significantly.  Methods: The study includes 100 patients with severe pre-eclampsia admitted Malda medical college hospital, from 1st June 2013 to 30th April 2014. This study compares the maternal fatal outcome between two groups of patients with severe pre-eclampsia (BP ≥160/110 mm. proteinuria 2 gm/24 hours. or ≥2 + dipstick.). The first group of patients were admitted in this institution after being referred from primary and secondary health care facilities, after getting initial prophylactic dose of magnesium sulphate (MgSO4) (Group A). The second group (Group B) includes those patients who were admitted without getting any prophylactic dose of magnesium sulphate (MgSO4) from outside.Results: Patients were included, in group A, eclampsia and maternal mortality were nil. Where as in group B eight (8) patients (16%) had eclampsia and 4 patents (8%) expired.Conclusions: Initial dose prophylactic magnesium sulphate (MgSO4) the earliest, can prevent both maternal perinatal maternal mortality. So, prophylactic magnesium sulphate (MgSO4) must be started at the first point of contact by trained health providers

High pressure-temperature proton migration in P-3 brucite [Mg(OH)2]: Implication for electrical conductivity in deep mantle

Hydrous minerals contribute largely to the transport and distribution of water into the mantle of earth to regulate the process of deep-water cycle. Brucite is one of the simplest layered dense hydrous mineral belonging to MgO-SiO2-H2O ternary system, which contains significant amount of water in the form of OH- groups, spanning a wide range of pressure stability. Simultaneously, the pressure (p) and temperature (T) induced mobility of protons within the layered structure of brucite is crucial for consequences on electrical conductivity of the mantle. Using ab initio molecular dynamics (AIMD) simulations, we investigate the diffusion of H in high-pressure trigonal P-3 polymorph of brucite in a combined p-T range of 10-85 GPa and 1250-2000K, relevant to the mantle of earth. The AIMD simulations reveal an unusual pressure-dependence of the proton migration in brucite characterized by maximum H-diffusion in the pressure range of 72-76 GPa along different isotherms. We predict that in the P-3 brucite the H mobility is onset only when a critical hydrostatic pressure is attained. The onset pressure is observed to drop with increasing temperature. The H-diffusion in brucite phase at elevated p-T takes place in such a manner that the process results in the amorphization of the H-sublattice, without disturbing the Mg- and O-sublattices. This selective amorphization yields a pool of highly mobile protons causing a subsequent increment in the electrical conductivity in P-3 brucite. Our calculated values of conductivity are compared with ex-situ geophysical magnetic satellite data indicating that brucite can be present in larger quantities in the lower mantle than previously observed. This hydroxide phase can occur as segregated patches between the dominant constituents e.g., silicates and oxides of the lower mantle and thus can explain the origin of high electrical conductivity therein.Comment: Preliminary draft, 6 figures, presented in Goldschimdt 2023 Conference (Lyon, France), comments are welcom

Sonographic assessment of lower uterine segment at term with previous caesarean section

Background: The present study is an attempt to evaluate the efficacy of trans abdominal sonography to measure the thickness of scarred lower uterine segment at term and to detect anatomical defect if there is any to predict the risk of scar rupture.Methods: This study assessed the usefulness of sonographic measurement of lower uterine segment thickness in 100 patients with previous Caesarean patients. Lower uterine segment thickness was compared by antenatal sonography caliper measurements and observations during caesarean section.Results: Lower uterine segment thickness measured by ultrasonography correlated well with the thickness measured by vernier calipers at Caesarean section. Sensitivity of 92.86%, specificity of 77.27%, positive predictive value of 83.87% and negative predictive value of 89.47% suggested that if the thickness of lower uterine segment was 2.6 mm or more, chances of vaginal delivery following trial of labour was high.Conclusions: Antenatal ultrasonographic assessment of lower uterine segment thickness can result a successful trial of labour in women with previous caesarean section

Efecto de una combinación indígena de AM y PGPR sobre el crecimiento y la productividad de chiles en suelos lateríticos

Infertile lateritic soil is particularly deficient in phosphorus (P) and Nitrogen (N). Arbuscular Mycorrhiza (AM) has a key role to uptake bound P from the soil and provide to the plants growing under P-poor conditions and improve water and nutrient uptake. Azotobacter fixes free nitrogen and phosphate solubilizing bacteria (PSB) release bound phosphate, are the important groups of plant growth-promoting rhizobacteria (PGPR), sometimes they may act as mycorrhiza helper and applied with AM as biofertilizer. This pot experiment was conducted to determine the primary impact of singly and combined application of native bio-inoculants, the AM, Acaulospora, and the PGPR, Azotobacter and Pseudomonas sp. (PSB) on growth and yield of chilli (Capsicum frutescens L.), growing in acid lateritic soil. Inoculated treatments were compared for growth and productivity of chilli in terms of height, leaf number, leaf area, root collar diameter, number of flowers and number of fruits, final fresh and dry yield. The productivity of chilli showed a maximum in combined treatment of Acaulospora, Azotobacter, and PSB. Also the AM spore count and root colonization found maximum in that treatment. Hence the application of indigenous AM inoculation along with native PGPR, Azotobacter and PSB may present better productivity in low fertile lateritic soil.El suelo laterítico infértil es particularmente deficiente en fósforo (P) y nitrógeno (N). Las micorrizas arbusculares (AM) tiene un papel clave para absorber el P unido del suelo y proporcionar a las plantas que crecen en condiciones de P pobre y mejorar la absorción de agua y nutrientes. Azotobacter que fija el nitrógeno libre y las bacterias solubilizadoras de fosfato (PSB), son grupos importantes de rizobacterias que promueven el crecimiento de las plantas (PGPR). A veces pueden actuar de conjunto con micorrizas y aplicarse con AM como biofertilizante. Este experimento en maceta se realizó para determinar el impacto primario de la aplicación individual y combinada de bio-inoculantes nativos, AM Acaulospora y PGPR Azotobacter y Pseudomonas sp. (PSB) sobre el crecimiento y el rendimiento del chile (Capsicum frutescens L.), que crece en suelo ácido laterítico. Los tratamientos inoculados se compararon para el crecimiento y la productividad del chile en términos de altura, número de hojas, área foliar, diámetro de raíz, número de flores, número de frutos, rendimiento final fresco y seco. La productividad de los chiles mostró un máximo en el tratamiento combinado de Acaulospora, Azotobacter y PSB. También el recuento de esporas de AM y la colonización de raíces encontraron el máximo en ese tratamiento. De ahí la aplicación de la inoculación de AM indígena junto con PGPR nativo, Azotobacter y PSB pueden presentar una mejor productividad en suelos lateríticos de baja fertilidad

Rotational Variability and Detection of Superflares in a Young Brown Dwarf by TESS

We present a comprehensive analysis of a Transiting Exoplanet Survey Satellite (TESS) high-quality light curve for a young brown dwarf, MHO~4 having spectral type M7.0, in the Taurus star-forming region. We investigate the rotation periods and characterize the BD's dynamic atmosphere and surface features. We present light curve analysis of MHO~4, and estimate the rotation period to be around 2.224~d. Remarkably, MHO~4 exhibits two significant flaring events. Furthermore, we also estimated bolometric flare energies to be within the energy range of $10^{34}$ to $10^{35}$ erg, which sits in the superflare category.Comment: 10 pages, 5 figure