Heavy metal induced histopathological alterations in liver of Channa gachua (Ham)

Discharge of heavy metals into aquatic environment from various sources even below permissible levels, creates health hazards in aquatic organisms. The persistence and ubiquitous nature of these pollutant compounds coupled with their tendency to accumulate in organisms ultimately produce toxic reaction in aquatic biota especially, fish. This study aims to investigate histopathological impact of lethal (1.0625 ppm, 1.4202ppm) and sublethal (0.1062ppm, 0.0531ppm and 0.1420ppm, 0.0710ppm) concentrations of mercury chloride and copper chloride in liver of fresh water teleost, Channa gachua (Ham) .The histopathology studies revealed vacuolation in cytoplasm, degeneration of nuclei, vacuolation in stroma, cloudy swellings, pycnotic nuclei, necrosis, rupture of blood sinusoids, disarray of hepatic cords, loss of shape of hepatocytes. Severity of damage was found to be dose dependent and time of exposure

ENHANCEMENT FOR DATA SECURITY IN CLOUD COMPUTING ENVIRONMENT

Cloud computing, a rapidly developing information technology, has aroused the concern of the whole world. Cloud computing is Internet-based computing, whereby shared resources, software and information, are provided to computers and devices on-demand, like the electricity grid. Cloud computing is the product of the fusion of traditional computing technology and network technology like grid computing, distributed computing parallel computing and so on. It aims to construct a perfect system with powerful computing capability through a large number of relatively low-cost computing entity, and using the advanced business model like SaaS (Software as a Service) to distribute the powerful computing capacity to end users’ hands. To address this longstanding limitation by building a multi-tenant system. Our system provides the environment for the user to perform his tasks, but with very high security. By using further facilities provided in this system user fill secure about his data and his account

Hyphomycetes from north Maharashtra

The present paper deals with five species of Dematiaceous Hyphomycetes were collected from the submerged wood samples from the various water bodies in North Maharashtra region. Two species viz. Camposporidium cristatum Nawawi and Kuthubutheen and Dictyosporium guanttii Bhat and Sutton are being recorded for the first time form India. While Bactrodesmium indicum Udaiyan and Diplocladiella longibrachiata Nawawi & Kuthubutheen are being reported  for the first time from Maharashtra state. Brief notes and illustration are given for each taxon. Geographical distribution of each species in India is also provided

Determination of minimum inhibitory concentration of third generation cephalosporins and fluoroquinolones on clinical isolates of Pseudomonas aeruginosa

Background: Pseudomonas aeruginosa has attracted much attention because of its high incidence of nosocomial infections in recent years. The multidrug resistance of these P. aeruginosa isolates plays an important role in the colonization or infection of chronically hospitalized patients. There is continued search for alternative drugs, such fluoroquinolones, and the third generation cephalosporins. The objective of present study was to test the susceptibility of the clinical isolates of P. aeruginosa to antimicrobials like ciprofloxacin, ofloxacin, ceftazidime, and cefoperazone. To determine their minimum inhibitory concentration (MIC) is in resistant isolates.Methods: The study was conducted in Bacteriology Laboratory, Department of Microbiology, Government Medical College, Miraj. The design of study: in vitro study on 50 clinical isolates of P. aeruginosa.Results: Among the third generation cephalosporins, ceftazidime (64%) exhibited maximum in vitro activity and among the fluoroquinolones ciprofloxacin (54%) exhibited maximum activity. Out of 50 clinical isolates of P. aeruginosa,17 were resistant to all four antimicrobials,22 were susceptible to all four antimicrobials, and 11 clinical isolates of P. aeruginosa showed mixed susceptibility-resistant pattern.Conclusion: MIC values for resistant strains of P. aeruginosa ranged from 0.03 to 32 µg/ml for fluoroquinolones and 0.5-512 µg/ml for third generation cephalosporins

Comparative Studies of Photochemical and Electrochemical Methods on Mineralization of Picric Acid

The effluents generated from synthesis and processing plant of Picric acid is reported to be carcinogenic and hence needs to be treated to reduce its concentration below safe discharge limit. Present paper deals with studies on mineralization of Picric acid by adopting photochemical and electrochemical processes and the efficacy of the both processes have been explored in details. Crucial process parameters viz. pH, concentration of oxidizer and catalyst for mineralization of Picric acid are optimized. In photochemical method, It is observed that Picric acid is treated to bring down its concentration from 100 ppm to ≤ 1 ppm under Photo-Fenton process  in 2 hrs whereas same treatment carried out under Photo- catalytic process takes only 1 hr. It is also observed that TiO2 xerogel and beads of nano-TiO2 are more efficient compared to that of commercially available TiO2. The TiO2–Polysulfone (PS) beads show less efficiency than TiO2 xerogel. However, the Picric acid oxidation efficiency for TiO2–PS beads is comparable and advantage of TiO2–PS beads is that it can easily be recovered from the treated solution and can be reused in the next experiments.  Electrochemical process is user’s friendly and economical. In case of electrochemical treatments at optimized process parameters under Electro-Fenton reaction picric acid is completely mineralized below its drain discharge limit where as under Electro-peroxide reaction picric acid is mineralized upto 3 ppm within 3 hrs. The treated solution has been characterized by using UV-Visible spectrophotometer, High performance Liquid Chromatography (HPLC) and Total Organic Carbon (TOC) Analyzer. The observed results have been interpreted and reported in the present paper

CHARACTERIZATION OF Pr6O11 DOPED ZINC FLUOROBORATE GLASS

Pr3+ doped zinc fluoroborate glasses with the chemical composition [(mol %) 30ZnF2 – 20 TeO2 – (50-x) B2O3 – xPr6O11] (where x = 0.0, 0.1, 0.5, 1.0 and 1.5 mol %) of different concentration of rare earth element praseodymium (Pr3+) have been prepared by conventional melt quench technique. The physical parameters like density, refractive index, number density, molar refraction, molar electronic polarizability, electronic polarizability, dielectric constant, polaron radius, inter–ionic separation, molar volume and oscillator strength of these glasses were calculated as a function of dopant concentration. The densities and refractive indices of these glasses were found to be in the range 2.0 g/cm3 - 2.67 g/cm3 and 1.644 – 1.73 respectively. Stability of the glass doped with 1.0 mol % Pr3+ was found to be 120

Scalar and Spinor Perturbation to the Kerr-NUT Spacetime

We study the scalar and spinor perturbation, namely the Klein-Gordan and Dirac equations, in the Kerr-NUT space-time. The metric is invariant under the duality transformation involving the exchange of mass and NUT parameters on one hand and radial and angle coordinates on the other. We show that this invariance is also shared by the scalar and spinor perturbation equations. Further, by the duality transformation, one can go from the Kerr to the dual Kerr solution, and vice versa, and the same applies to the perturbation equations. In particular, it turns out that the potential barriers felt by the incoming scalar and spinor fields are higher for the dual Kerr than that for the Kerr. We also comment on existence of horizon and singularity.Comment: 31 pages including 20 figures, RevTeX style: Final version to appear in Classical and Quantum Gravit

A Bird view on Heat Transfer Enhancement in a Tube with Twisted Tape Insert

Different kinds of methods used to enhance heat transfer rate of heat exchanger without influencing overall performance of the heat exchanger referred as heat transfer enhancement techniques. This technique are categorized into three types i.e. active technique, passive technique, and compound technique Some of the application of heat exchanger which require enhancement in heat transfer are – Air conditioning equipments, radiators, refrigerators, thermal Power plants etc. The intention of enhanced heat transfer is to encourage high heat fluxes, this result in reduction in size of heat exchanger. The present paper is a review of research work in last decade on heat transfer enhancement in a Heat Exchanger DOI: 10.17762/ijritcc2321-8169.15037

Observation of off-diagonal geometric phase in polarized neutron interferometer experiments

Off-diagonal geometric phases acquired in the evolution of a spin-1/2 system have been investigated by means of a polarized neutron interferometer. Final counts with and without polarization analysis enable us to observe simultaneously the off-diagonal and diagonal geometric phases in two detectors. We have quantitatively measured the off-diagonal geometric phase for noncyclic evolutions, confirming the theoretical predictions. We discuss the significance of our experiment in terms of geometric phases (both diagonal and off-diagonal) and in terms of the quantum erasing phenomenon.Comment: pdf, 22 pages + 8 figures (included in the pdf). In print on Phys. Rev.