Effects of lengthscales and attractions on the collapse of hydrophobic polymers in water

We present results from extensive molecular dynamics simulations of collapse transitions of hydrophobic polymers in explicit water focused on understanding effects of lengthscale of the hydrophobic surface and of attractive interactions on folding. Hydrophobic polymers display parabolic, protein-like, temperature-dependent free energy of unfolding. Folded states of small attractive polymers are marginally stable at 300 K, and can be unfolded by heating or cooling. Increasing the lengthscale or decreasing the polymer-water attractions stabilizes folded states significantly, the former dominated by the hydration contribution. That hydration contribution can be described by the surface tension model, $\Delta G=\gamma (T)\Delta A$, where the surface tension, $\gamma$, is lengthscale dependent and decreases monotonically with temperature. The resulting variation of the hydration entropy with polymer lengthscale is consistent with theoretical predictions of Huang and Chandler (Proc. Natl. Acad. Sci.,97, 8324-8327, 2000) that explain the blurring of entropy convergence observed in protein folding thermodynamics. Analysis of water structure shows that the polymer-water hydrophobic interface is soft and weakly dewetted, and is characterized by enhanced interfacial density fluctuations. Formation of this interface, which induces polymer folding, is strongly opposed by enthalpy and favored by entropy, similar to the vapor-liquid interface.Comment: 24 pages, 5 figure

Synthesis of Nanocrystalline PZT by Hydrothermal Method

Synthesis of lead zirconium titanate by a simple, low-energy consumption hydrothermalmeans is being reported. The precursor materials have been chosen and the method is tailoredso that the process becomes economical and offers low lead loss. The synthesised powdershave been analysed by FTIR, XRD, SEM, TEM, and TGA. The results show the formation oftetragonal PZT nanoparticles with an average yield of ~75 per cent. On the basis of FTIR, theproduct formation is understood to proceed via the formation of a three metal cation hydroxidecomplex, that under hydrothermal treatment undergoes conversion directly to form the tetragonalphase of lead zirconium titanate

Prescribing pattern of nutraceuticals in pediatric outpatient department at tertiary care teaching hospital

Background: Nutraceuticals use is increasing in a health-conscious society. Because of varying lifestyle diseases, people have changed their outlook towards nutraceuticals. The objective of the study was to study the prescription pattern of nutraceuticals by doctors in paediatric outpatient department of government medical college and hospital, Aurangabad, Maharashtra, India.Methods: This study was done between November 2018 to March 2019. Total of 156 patients were included in the study after obtaining written informed consent from parents of patients. The data was gathered, analysed and results were concluded.Results: Total 156 patients were prescribed nutraceuticals in paediatric outpatient department of which 51.92% female patients and 48.78% male patients received nutraceuticals. In this study, 62% patients received vitamins and 38% patients received vitamins and minerals. 67.31% patient receiving nutraceuticals were above the age of 6 years and 32.69% patients were under the age of 6 years. Among patients receiving nutraceuticals, B complex was received 55.77%. After that calcium lactate + vitamin D tablet were prescribed 21.80%. Ferrous sulfate + folic acid was received by 8.33% patients. Calcium carbonate + vitamin D3 were received by 7.69% patients. Folic acid tablet was received by 5.13% patients and poly-vitamin tablet by 1.28% patients. 100% prescriptions were prescribed in generic names.Conclusions: Nutraceuticals are being increasingly perceived as beneficial to health and are being continuously used in the treatment. The future of nutraceuticals is bright and can transform healthcare in a developing country like India

Drug utilization study in medicine intensive care unit in tertiary care hospital

Background: The medical intensive care unit (MICU) is a setting were patients who are critically ill are admitted and thus usually receive a large number of drugs of different pharmacological classes due to life threatening illnesses which may be fatal. The various drugs used in MICU and there clinical outcome was investigated in this study.Methods: Patients admitted between January 2017 to June 2018 in Medicine ICU of GMC Aurangabad were included in this study.Results: Total of 351 prescriptions was analyzed from the medicine intensive care unit. Out of 351 patients 243 (69.23%) were male, while 108 (30.77%) were female. The mean age of the patients admitted in MICU was 42.78±18.14 years. The most common type of patients admitted in MICU have the diagnosis of organophosphorous poisoning (25.36%), followed by cerebrovascular accident (15.95%), pneumonitis (10.26%), snake bite (7.12%), chronic kidney disease (5.98%), diabetic ketoacidosis (5.70%) and seizure disorder (3.42%). The most common drugs used were ranitidine (99.71%) and ondansetron (99.43%). Among antibiotics cephalosporins were most commonly used, ceftriaxone (39.03%), cefotaxim (40.46%), cefoperazone and sulbactum (24.22%). Other antibiotics most commonly used were metronidazole (61.25%), amoxicillin and potassium clavulanate (26.78%), piperacillin and tazobactum (11.68%), meropenem (11.40%).Conclusions: In conclusion, we found that in MICU utilization rate of gastroprotective (ranitidine), antiemetic (ondansetron) and antibiotics (cephalosporins) was high. The present study provides valuable insight about the overall pattern of drugs used in medicine intensive care unit

An Improved Intrusion Prevention Sytem for WLAN

The volatile growth in wireless networks over the last few years resembles the rapid growth of the Internet within the last decade. The current IPS presents a less security. Unfortunately, our work combined with the work of others show that each of these mechanisms are completely futile. As a result, organizations with deployed wireless networks are vulnerable to illegal use of, and access to, their internal communications

The Ternary System Cu2HIO6 ⋅ 2H2O-H5IO6-H2O at 303 K

Copper hexaoxoiodates 4CuO ⋅ I2O7 ⋅ 5H2O, 3CuO ⋅ I2O7 ⋅ 3H2O and 3CuO ⋅ 2I2O7 ⋅ 7H2O have been isolated from the ternary system Cu2HIO6 ⋅ 2H2O-H5IO6-H2O at 303 K and studied by chemical, thermal X-ray diffraction and infrared spectroscopic methods. Some of the intermediates obtained on isothermal heating of the parent compounds have been characterised

Microwave Combustion Synthesis of Silver Doped Lanthanum Ferrite Magnetic Nanoparticles

Lanthanum ferrite (LaFeO3) and silver doped LaFeO3 powders were synthesized by a single step microwave combustion route using nitrates as precursors and glycine as a fuel. XRD analysis indicated the formation of cubic phase with the dopant peaks at 2θ values of 38.3°, 44.1° and 64.4° apart from the peaks corresponding to LaFeO3. As observed from the transmission electron micrographs, LaFeO3 exhibits particles with a larger size (mean size ~57 nm), significant decrease in particle size is observed for silver doped samples. The magnetic measurements reveal weak ferromagnetic nature of LaFeO3, while silver doped samples are ferromagnetic in nature. Lanthanum silver ferrite (x=0.25, A site) shows maximum coercivity (Hci=480.96G) with hysteresis loop at room temperature which is a clear sign of ferromagnetic ordering. The S shape of the curve implies the presence of domain wall movements in nanoparticles. Thermogravimetric analysis of the samples show stable behavior of the products.Defence Science Journal, 2013, 63(3), pp.285-291, DOI:http://dx.doi.org/10.14429/dsj.63.238

Impact, Friction, Shock Sensitivities and DDT Behaviour of Advanced CMDB Propellants

This paper reports results of impact, friction and shock sensitivities of CMDB propellants containing AP, RDX, PETN and their combinations. Results of impact and friction sensitivities indicate that CMDB propellants containing AP are highly sensitive and AP-based compositions are more impact and friction sensitive than RDX and PETN-based compositions, qnd that these sensitivities are proportionalto oxygen balance of the composition, which is in agreement withearlier findings. Inclusion of high explosives like RDX and PETN increases the shock sensitivity of CMDB formulations, whereas AP-based compositions are least shock sensitive. There exists are lationship between shock sensitivity and VOD of the individual oxidiser/high energy ingredient incorporated in the formulation. Shockamplitude values of 87 and 46 k bar in CMDB and DBP, as determinedby NOL card gap test, suggest that CMDB propellants are much more shock sensitive than DBP. Composite propellants are insensitive toshock, as they did not undergo detonation even at zero card gap.Results of DDT behaviour of CMDB propellants show that they aremore prone to deflagration to detonation transition under adverse conditions

Effect of mifepristone in cervical ripening for induction of labour

Background: Mifepristone is potentially a method of inducing labour in late pregnancy by increasing uterine contractility and by increasing the sensitivity of the uterus to the actions of prostaglandins. Present study was done to portrait the beneficial of mifepristone induction of labour. The objective was to study the effect of mifepristone in induction of labour with the outcome of induction of labour (IOL).Methods: 100 patients (term) were included, after their informed consent. Patients were categorized by BISHOP SCORE at the beginning of induction for comparison of BS, mode of delivery, induction delivery interval (IDI). Women undergoing induction with RU486 (200mg PO) were grouped in one and those with placebo control group into another. Statistical analysis of categorical variables was done.Results: Rate of successful IOL or vaginal delivery was 76% in study group and only 36% in control group. After induction with mifepristone for cervical ripening in study group 76% patient who had cervical score 8 within 24 hours, whereas in control group 2% female’s cervical score was>8. Among the babies, 44% in the control group required baby unit admission as compared to 36% in the study group.Conclusions: In the present study, the women who were induced with mifepristone 200 mg per orally showed drastic improvement in cervical score within 24-48 hours and decreased the cesarean rate in the study group and amount of dose requirement of augmentation of labour with Misoprostol or Oxytocin, lesser NICU admission and maternal complication