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

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

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

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

Metallised Fuel rich Propellants for Solid Rocket Ramjet: A Review

This paper reviews the research work carried out in the field of metallised fuel-rich propellants (FRP). Limitations and merits of various potential metals (Al, Mg, B, Be, or Zr) as a component of FRP are discussed. The paper also includes a discussion on the combustion mechanism of metallised propellants, including problem areas and probable remedial measures. Zirconium and Ti appear to have potential to offer FRP with efficient combustion. Ideal performance is not achieved with current systems based on Al and B and further work is needed to develop FRP having all three desirable attributes, viz., ease of ignition, stable combustion and high specific impulse (I/sub sp/) in a single composition

Extensive Gingival Enlargement in Siblings : A case report

Gingival fibromatosis is characterised by varying degrees of fibrotic gingival overgrowth that can be caused by a variety of aetiological factors. Hereditary gingival fibromatosis (HGF) is a rare genetic disorder, characterised by a slowly progressive, benign enlargement of keratinised gingiva. The condition may be found in an autosomal dominant or autosomal recessive mode of inheritance, the former being more common. It usually develops as an isolated disorder but can be one feature of a multisystem syndrome. Accordingly, HGF has been divided into two forms: non-syndromic and syndromic. The gingival enlargement can be localised or generalised, but usually involves both arches. The authors describe a case of non-syndromic generalised severe HGF, involving the maxillary and mandibular arches in two brothers. This report focuses on the diagnosis, treatment, and control of the disease. The pattern of inheritance and histopathologic characteristics are also emphasised.

Drug utilization study in schizophrenia patients in outpatient department of psychiatry: an observational prospective study

Background: A mental disorder or psychiatry disorder is a behavioural or mental pattern that causes significant distress or impairment of personal functioning. Schizophrenia is one of the most common psychiatric disorders. Aim of the study is to study drug utilization pattern in schizophrenia patients in outpatient department of psychiatry.Methods: A prospective and observational study was conducted in psychiatry outpatient department between May 2018 to October 2018 at Government Medical College and Hospital Aurangabad. Approval from ethics committee was taken. Data collected was of age, sex, final diagnosis, drugs prescribed to patients from case report form. The data obtained was then analyzed in Microsoft excel.Results: Total prescriptions of 129 patients were analyzed. Out of 129 patients 99 (76.74%) were male, while 30 (23.26%) were female. The mean age of the patients admitted in Psychiatry OPD was 36.71±11.76 years. Number of drugs prescribed per patient being 3.40±1.12 (mean±SD). The most common drugs used were olanzapine (66.6%), trihexyphenidyl (51.9%), lorazepam (44.9%), risperidone (39.5%), trifluoperazine (27.9%).Conclusions: Our study shows that atypical antipsychotics were the most common drugs prescribed in patients. Olanzapine was the most common medication used followed by risperidone. Our prospective study is carried out to get a more comprehensive data so that we can improve the drug utilization in our hospital

Unraveling the cytotoxic potential of Temozolomide loaded into PLGA nanoparticles

BACKGROUND: Nanotechnology has received great attention since a decade for the treatment of different varieties of cancer. However, there is a limited data available on the cytotoxic potential of Temozolomide (TMZ) formulations. In the current research work, an attempt has been made to understand the anti-metastatic effect of the drug after loading into PLGA nanoparticles against C6 glioma cells. Nanoparticles were prepared using solvent diffusion method and were characterized for size and morphology. Diffusion of the drug from the nanoparticles was studied by dialysis method. The designed nanoparticles were also assessed for cellular uptake using confocal microscopy and flow cytometry. RESULTS: PLGA nanoparticles caused a sustained release of the drug and showed a higher cellular uptake. The drug formulations also affected the cellular proliferation and motility. CONCLUSION: PLGA coated nanoparticles prolong the activity of the loaded drug while retaining the anti-metastatic activity

Extended surfaces modulate and can catalyze hydrophobic effects

Interfaces are a most common motif in complex systems. To understand how the presence of interfaces affect hydrophobic phenomena, we use molecular simulations and theory to study hydration of solutes at interfaces. The solutes range in size from sub-nanometer to a few nanometers. The interfaces are self-assembled monolayers with a range of chemistries, from hydrophilic to hydrophobic. We show that the driving force for assembly in the vicinity of a hydrophobic surface is weaker than that in bulk water, and decreases with increasing temperature, in contrast to that in the bulk. We explain these distinct features in terms of an interplay between interfacial fluctuations and excluded volume effects---the physics encoded in Lum-Chandler-Weeks theory [J. Phys. Chem. B 103, 4570--4577 (1999)]. Our results suggest a catalytic role for hydrophobic interfaces in the unfolding of proteins, for example, in the interior of chaperonins and in amyloid formation.Comment: 22 pages, 5 figure

Fluctuations of water near extended hydrophobic and hydrophilic surfaces

We use molecular dynamics simulations of the SPC-E model of liquid water to derive probability distributions for water density fluctuations in probe volumes of different shapes and sizes, both in the bulk as well as near hydrophobic and hydrophilic surfaces. To obtain our results, we introduce a biased sampling of coarse-grained densities, which in turn biases the actual solvent density. The technique is easily combined with molecular dynamics integration algorithms. Our principal result is that the probability for density fluctuations of water near a hydrophobic surface, with or without surface-water attractions, is akin to density fluctuations at the water-vapor interface. Specifically, the probability of density depletion near the surface is significantly larger than that in bulk. In contrast, we find that the statistics of water density fluctuations near a model hydrophilic surface are similar to that in the bulk