Effect of laser on the bound magnetic polaron in a semimagnetic quantum wire

In the present investigation binding energy of the laser dressed hydrogenic donor in a Semi magnetic Quantum Wire like Cd1 – xMnx2Te/Cd1 – x1Mnx1Te/Cd1 – x2Mnx2Te and spin polaronic shift has been computed for various magnetic and laser fields within the effective mass approximation in the finite barrier model using variational method. The results are presented and discussed. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2790

Pharmacological investigation of Thespesea populnea bark extract for analgesic activity

Background: Pain is an unpleasant and distressing common problem with profound impact on individuals and society. Existing treatment modalities used for pain management are either less effective or exhibits several side effects. The aim of current study is to investigate the analgesic activity of stem bark extract of Thespesea populnea for pain management.Methods: Thirty Swiss albino were divided into five groups including control, standard and three tests groups (different doses of Thespesea populnea bark extract). Groups were investigated for analgesic activity using hot plate induced paw withdrawal, acetic acid induced writhing and formalin induced paw licking models.Results: Findings of hot plate model revealed that, percent increase in reflex latency of paw licking response in mice for test drug (10 mg/kg), attained peak effect of 136% at 180 minutes, whereas for standard pentazocine peak effect of 125% was attained at 180 minutes. In acetic acid model, the maximum percent inhibition in number of writhings for the test drug (30 mg/kg) was 68% and for standard diclofenac, it was 80%. In formalin model, percent inhibition in licking response in early and late phases for test drug (30 mg/kg) were 81% and 91% and for standard diclofenac it was 56% and 94% respectively. It was thus depicted that analgesic activity of test drug was significantly more than the standard in early phase and equivalent to standard in late phase.Conclusions: It was concluded that Thespesea populnea bark extract at a dose of 10 mg/kg showed potential peripheral and central analgesic activity

Magnetic properties of Hydrogenated Li and Co doped ZnO nanoparticles

The effect of hydrogenation on magnetic properties of Zn0.85Co0.05Li0.10O nanoparticles is presented. It was found that the sample hydrided at room temperature (RT) showed weak ferromagnetism (FM) while that hydrided at 400oC showed robust ferromagnetism at room temperature. In both cases reheating the sample at 400oC in air converts it back into paramagnetic state (P) completely. The characterization of samples by X-ray and electron diffraction (ED) showed that room temperature ferromagnetism observed in the samples hydrogenated at RT is intrinsic in nature whereas that observed in the samples hydrogenated at 400oC is partly due to the cobalt metal clusters.Comment: 10 pages, 3 figure

Mineral Nutrient Variations in Soybean (Glycine max ) After Treatment with Exogenous Cobalt

In this experiment, we tried to explore the changes that are occurring in soybean plants due to the treatment with exogenous cobalt. A  pot culture experiment was conducted and cobalt was given to Soybean (Glycine max) plants by soil drenching method. Nitrogen, phosphorus, potassium, copper, iron, manganese and zinc contents were extracted and estimated from both control and treated plant parts (from roots and shoot). The results showed the low concentrations of cobalt (50 mg kg-1 Co level) in the soil enhanced these parameters while higher concentration (Co level (100-200 mg kg-1) in the soil) didn’t show any significant effect.Â&nbsp

Layer number and stacking order-dependent thermal transport in molybdenum disulfide with sulfur vacancies

Recent theoretical works on two-dimensional molybdenum disulfide, MoS$_2$, with sulfur vacancies predict that the suppression of thermal transport in MoS$_2$ by point defects is more prominent in monolayers and becomes negligible as layer number increases. Here, we investigate experimentally the thermal transport properties of two-dimensional molybdenum disulfide crystals with inherent sulfur vacancies. We study the first-order temperature coefficients of interlayer and intralayer Raman modes of MoS$_2$ crystals with different layer numbers and stacking orders. The in-plane thermal conductivity ($\kappa$) and total interface conductance per unit area ($g$) across the 2D material-substrate interface of mono-, bi- and tri-layer MoS$_2$ samples are measured using the micro-Raman thermometry. Our results clearly demonstrate that the thermal conductivity is significantly suppressed by sulfur vacancies in monolayer MoS$_2$. However, this reduction in $\kappa$ becomes less evident as the layer number increases, confirming the theoretical predictions. No significant variation is observed in the $\kappa$ and $g$ values of 2H and 3R stacked bilayer MoS$_2$ samples

A study of clinical profile of cardiac dysfunction in patients with HIV infection

Background: HIV infection is a major health problem across the entire world including India. The introduction of anti-retroviral therapy (ART) have led to a significant reduction in opportunistic infections and hence increased life expectancy of HIV-infected individuals. This resulted in an increase in prevalence of cardiovascular diseases among these individuals. Aim was to study the clinical profile of cardiac dysfunction in patients with HIV infection and to find whether CD-4 influence on the disease pattern and severity.Methods: This study was a cross sectional study conducted in Sixty HIV infected patients who attended Anti-Retroviral Therapy Centre, Government Medical College, Thiruvananthapuram, Kerala, India during a period of fifteen months. Patients underwent a thorough clinical examination and other relevant investigations including CD-4 count, ECG and transthoracic echocardiography.Results: In our study it was found that cardiac involvement is common even in asymptomatic HIV infected patients. Cardiac manifestations observed were left ventricular diastolic dysfunction (25%), left ventricular hypertrophy (15%), dilated cardiomyopathy (15%), pericardial effusion (13.3%) and mild pulmonary artery hypertension (10%). Cardiac involvement is more common in those with low CD-4 count. Among these conditions Concentric Left Ventricular Hypertrophy had a statistically significant correlation with CD-4 count.Conclusions: We observed that some form of cardiac involvement was common even in asymptomatic HIV infected patients and cardiac involvement was inversely associated with CD-4 Count of the patient. Transthoracic echocardiography is a good non-invasive tool for the early detection of cardiac abnormalities. Cardiac involvement can be easily overlooked in these patients as symptoms can be attributed to associated co morbid illnesses, so every HIV infected patients should undergo a thorough clinical examination and relevant cardiac evaluation at the time of diagnosis and periodically to decrease cardiac associated morbidity and mortality

Study of tensile deformation behaviour of M250 grade maraging steel using acoustic emission

Tensile testing of solution annealed and thermally aged (755 K for various durations in the range of 0.25-100 h) specimens of M250 grade maraging steel has been carried out along with acoustic emission (AE) monitoring. Results have shown that strength increases and ductility decreases upon ageing up to 10 h and this has been attributed primarily to the precipitation of Ni3Ti. Continued increase in strength up to 40 h of ageing has been attributed primarily to the precipitation of Fe2Mo in addition to Ni3Ti. Increase in ductility for 10-40 h of ageing has been attributed to dissolution of needle like Ni3Ti precipitates and formation of fine spherical Fe2Mo. Ageing beyond 40 h decreases strength and increases ductility due to the reversion of martensite to austenite and coarsening of the precipitates. The AE generated during tensile deformation depends on the ageing time. Increased occurrence of shearing of the precipitates by dislocations and increased brittleness of the matrix up to 10 h ageing increases the AE. The decrease in the AE beyond 10 h of ageing is due to the occurrence of deformation by Orowan looping, dissolution of Ni3Ti precipitates and austenite reversion. The scanning electron microscopy (SEM) of the fracture surfaces has shown ductile fracture characterized by dimples and changes in the size and shape of the dimples with ageing time