Synthesis and study of electrical properties of polyaniline and polyester nanocomposite

In this study, pure polyaniline (PANI) and PANI/polyester nanocomposites (wt % 10, 20 and 30) of thickness 10 mm have been synthesized by co-precipitation method to investigate their electrical properties. Pure PANI and its composites are then characterized using SEM, FTIR, DSC, I-V Hall and dielectric techniques. From SEM, it is observed that the particles are spherical and lying in range of micron order. To find out the nature of chemical bonds, FTIR analysis and thermal characterization (DSC) are performed. From the I-V curve, the calculated values of conductance of prepared pure PANI and PANI/PET (wt % 10, 20 and 30 nanocomposite) are obtained as 3.78×10-7, 9.7933×10-7, 9.584×10-8 and 9.882×10-9 ohm-1 respectively. From Hall measurement, electrical conductivity of pure PANI and PANI/PET (wt % 10, 20 and 30) nanocomposite is found 49.26 ×10-6, 13.82 ×10-6, 40.6 ×10-7 and 18.761 ×10-7 Ω-1cm-1 respectively. Dielectric study of PANI/PET reveals downturn in the dielectric constant value with increased frequency. The electrical resistivity of the PANI/PET nanocomposite shows high anti-static efficiency

Glycoslated Haemoglobin as a Diagnostic Marker of Diabetes Mellitus in Acute Myocardial Infarction and Correlation with Dietary Pattern

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Comparison of maternal outcome in COVID-19 positive and negative antenatal women: a comparative study

Background: Coronavirus is an RNA virus causing respiratory and gastrointestinal infections. It caused SARS and MERS epidemics. In late 2019, a mutation called SARS-CoV-2 caused COVID-19, a severe respiratory illness. Pregnant women are at risk, but information is limited. The second wave affected pregnant women more. Maternal COVID-19 can lead to preterm births and caesarean sections. Vertical transmission to neonates is possible. Ongoing research is crucial to understand COVID-19's impact on mothers. Methods: A comparative prospective hospital-based study was conducted, including antenatal women with COVID-19 symptoms in the case group. The control group consisted of antenatal women who tested negative for COVID-19. The study analyzed 150 COVID-19-positive antenatal women and 350 COVID-19-negative antenatal women, excluding those who left the study prematurely or tested positive during the study period. Results: In the case group, no abortions were reported (0%), while in the control group, there was 1 abortion (0.29%). PROM occurred in 5.78% of cases and 1.43% of controls, with a significant difference. PPROM occurred in 2.31% of cases and 2.57% of controls, showing no significant difference. Preterm labor was observed in 11.53% of cases and 3.71% of controls, with a significant difference. Conclusions: Pregnant women with COVID-19 experience diverse symptoms, highlighting the importance of vigilant monitoring. Adverse maternal outcomes, including preterm labor and ICU admission, are more common in infected individuals. Managing comorbidities, such as diabetes, is crucial

Synthesis and study of electrical properties of polyaniline and polyester nanocomposite

215-219In this study, pure polyaniline (PANI) and PANI/polyester nanocomposites (wt % 10, 20 and 30) of thickness 10 mm have been synthesized by co-precipitation method to investigate their electrical properties. Pure PANI and its composites are then characterized using SEM, FTIR, DSC, I-V Hall and dielectric techniques. From SEM, it is observed that the particles are spherical and lying in range of micron order. To find out the nature of chemical bonds, FTIR analysis and thermal characterization (DSC) are performed. From the I-V curve, the calculated values of conductance of prepared pure PANI and PANI/PET (wt % 10, 20 and 30 nanocomposite) are obtained as 3.78×10-7, 9.7933×10-7, 9.584×10-8 and 9.882×10-9 ohm-1 respectively. From Hall measurement, electrical conductivity of pure PANI and PANI/PET (wt % 10, 20 and 30) nanocomposite is found 49.26 ×10-6, 13.82 ×10-6, 40.6 ×10-7 and 18.761 ×10-7 Ω-1cm-1 respectively. Dielectric study of PANI/PET reveals downturn in the dielectric constant value with increased frequency. The electrical resistivity of the PANI/PET nanocomposite shows high anti-static efficiency

Bursting behavior of polyester needle-punched filter fabrics

253-259The effect of fabric weight, depth of needle penetration and needling density on bursting strength of needle-punched nonwoven filter fabrics prepared from virgin and recycled polyester fibres has been studied. The effect of fabric parameters on bursting behavior trend is found similar in both the virgin and the recycled polyester filter fabric samples. There is considerable fall in bursting strength of recycled polyester fabrics as compared to that in virgin one, under high fabric weight and needling density. Interestingly, it has been found that the recycled polyester filter fabric shows 3.584% lesser strength (average value of all samples) than the virgin polyester filter fabric, which signifies the use of recycled polyester filter wherever applicable, considering the recyclability and sustainability aspects

Bursting behavior of polyester needle-punched filter fabrics

The effect of fabric weight, depth of needle penetration and needling density on bursting strength of needle-punched nonwoven filter fabrics prepared from virgin and recycled polyester fibres has been studied. The effect of fabric parameters on bursting behavior trend is found similar in both the virgin and the recycled polyester filter fabric samples. There is considerable fall in bursting strength of recycled polyester fabrics as compared to that in virgin one, under high fabric weight and needling density. Interestingly, it has been found that the recycled polyester filter fabric shows 3.584% lesser strength (average value of all samples) than the virgin polyester filter fabric, which signifies the use of recycled polyester filter wherever applicable, considering the recyclability and sustainability aspects

Enhancement of Germination on Abrus Precatorius L. Seeds by Specific Pre-sowing Treatments

Herbal medicines are in great demand for preliminary health care due to their wide medicinal value, with no side effects. Since many species are used in the system of traditional medicine, scientists have great opportunities to develop appropriate packages of practices for their multiplication and conservation. Abrus precatorius is the native plant of India and used in many ways in the Indian Ayurvedic system of medicine. This seeds of the species is dormant due to hard seed coat. So the aim of the study is to remove seed dormancy and enhance germination capacity within a short period. To overcome the problem of dormancy, seeds were scarified by seed scarifier and sand paper and also treated with acid (H2SO4) and hot water just before sowing. 60-95% germination was achieved under different treatment conditions while the seeds without any treatment fail to germinate. The highest (95%) germination was observed just 12 days after sowing in seeds treated with concentrated H2SO4 for 120 minutes. 70-75% germination was achieved when the seeds were treated with acid for 105 and 135 minutes. Seeds treated with con. H2SO4 for 150, 90 and 60 minutes and also scarified by sand paper showed similar results with 60-65% germination. The seeds scarified by a mechanical scarifier and treated with hot water did not show more than 32.5% germination

Estimates, trends, and drivers of the global burden of type 2 diabetes attributable to PM2.5 air pollution, 1990-2019 : An analysis of data from the Global Burden of Disease Study 2019

Background Experimental and epidemiological studies indicate an association between exposure to particulate matter (PM) air pollution and increased risk of type 2 diabetes. In view of the high and increasing prevalence of diabetes, we aimed to quantify the burden of type 2 diabetes attributable to PM2·5 originating from ambient and household air pollution. Methods We systematically compiled all relevant cohort and case-control studies assessing the effect of exposure to household and ambient fine particulate matter (PM2·5) air pollution on type 2 diabetes incidence and mortality. We derived an exposure–response curve from the extracted relative risk estimates using the MR-BRT (meta-regression—Bayesian, regularised, trimmed) tool. The estimated curve was linked to ambient and household PM2·5 exposures from the Global Burden of Diseases, Injuries, and Risk Factors Study 2019, and estimates of the attributable burden (population attributable fractions and rates per 100 000 population of deaths and disability-adjusted life-years) for 204 countries from 1990 to 2019 were calculated. We also assessed the role of changes in exposure, population size, age, and type 2 diabetes incidence in the observed trend in PM2·5-attributable type 2 diabetes burden. All estimates are presented with 95% uncertainty intervals. Findings In 2019, approximately a fifth of the global burden of type 2 diabetes was attributable to PM2·5 exposure, with an estimated 3·78 (95% uncertainty interval 2·68–4·83) deaths per 100 000 population and 167 (117–223) disability-adjusted life-years (DALYs) per 100 000 population. Approximately 13·4% (9·49–17·5) of deaths and 13·6% (9·73–17·9) of DALYs due to type 2 diabetes were contributed by ambient PM2·5, and 6·50% (4·22–9·53) of deaths and 5·92% (3·81–8·64) of DALYs by household air pollution. High burdens, in terms of numbers as well as rates, were estimated in Asia, sub-Saharan Africa, and South America. Since 1990, the attributable burden has increased by 50%, driven largely by population growth and ageing. Globally, the impact of reductions in household air pollution was largely offset by increased ambient PM2·5. Interpretation Air pollution is a major risk factor for diabetes. We estimated that about a fifth of the global burden of type 2 diabetes is attributable PM2·5 pollution. Air pollution mitigation therefore might have an essential role in reducing the global disease burden resulting from type 2 diabetes

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.