Mast Cell Tumour in a Dog and Its Surgical Management

Abstract An 8-year-old male Labrador dog was presented with a history of inappetence, occasional bloody diarrhoea and two ulcerated pea-nut sized swelling in the groin region. On the basis of complete blood cell count and cytological examination of the tumour aspirate it was diagnosed as a case of mast cell tumour. Under general anaesthesia the tumour nodules were excised and three doses of vincrystine sulphate were given at recommended dose with dextrose normal saline. Post-operatively antibiotics, analgesics and supportive therapy were followed and the dog recovered well without any recurrence

Comparative time series RNA-seq analysis of Pigeonpea Root Tissues in response to Fusarium udum infection

Pigeonpea [Cajanus cajan (L.) Millsp.] is an important food legume and is mostly cultivated in tropical and subtropical regions of South Asia, Kenya, Malawi, Bangladesh, and other parts of the world. India is the center of origin and major global producer (66%), consumer, and importer, ahead of production in Africa (14%)..

Large-scale manufacture of ZnO nanorods by flame spray pyrolysis

Large quantities of ZnO nanorods (>3 kg/h throughput) were produced in the gas-phase by flame spray pyrolysis (FSP) of a zinc nitrate-ethanol precursor solution without employing any catalysts or dopants. The nanorods with diameters of 20-30 nm and aspect ratios as high as seven were collected as a dry powder. Several rods self-aligned by forming junctions at the basal planes, while some even assembled into tetrapods. The aspect ratio of the nanorods could be controlled by the concentration of the Zn ions in the starting precursor solution, its delivery rate, and the oxygen flow into the reactor. To the best of our knowledge, this is the first time that synthesis of high aspect ratio ZnO nanorods by FSP is reported. Previous lab-scale experiments always yielded rather spherical albeit slightly elongated nanoparticles unless dopants were added. Such a product powder was obtained here when the ethanol in the precursor solution was replaced by methanol at otherwise constant process conditions. This is attributed to different temperature-time histories of the particles in the flame based on which a mechanism for ZnO nanorod formation in spray flames is proposed

A novel economical grain boundary engineered ultra-high performance ZnO varistor with lesser dopants

A varistor having ultra-high performance was developed from doped ZnO nanopowders using a novel composition consisting of only three (Bi, Ca and Co oxides) dopants. Improved varistor properties were obtained (breakdown field (E-b) 27.5 +/- 5 kV cm(-1), coefficient of nonlinearity (alpha) 72 +/- 3 and leakage current density (Lc) 1.5 +/- 0.06 mu Acm(-2)) which are attributed to the small grain size and grain boundary engineering by phases such as Ca4Bi6O13 and Ca0.89Bi3.11O5.56 along with Co+2 doping in the ZnO lattice. Complex impedance data indicated three relaxations at 25 degrees C and two relaxations at high temperature (>100 degrees C). The complex impedance data were fitted into two parallel RC model to extract electrical properties. Two stages of activation energy for DC conductivity were observed in these varistor samples where region I (< 150 degrees C) is found to be due to shallow traps and region II (< 225 degrees C) is due to deep traps. The novel composition is useful for commercial exploitation in wide range of surge protection applications

Band gap and chemically ordered domain structure of a graphene analogue B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB>

Chemically synthesized few layer graphene analogues of B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB> are characterized by aberration corrected transmission electron microscopy and high resolution electron energy loss spectroscopy (HREELS) to determine the local phase, electronic structure and band gap. HREELS band gap studies of a B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB> composition reveal absorption edges at 2.08, 3.43 and 6.01 eV, indicating that the B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB> structure may consist of domains of different compositions. The K-absorption edge energy position of the individual elements in B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB> is determined and compared with h-BN and graphite. An understanding of these experimental findings is developed with complementary first-principles based calculations of the various ordered configurations of B<SUB>x</SUB>C<SUB>y</SUB>N<SUB>z</SUB>

An Investigation to Assess the Cause of Accident due to Flyrockin an Opencast Coal Mine: A Case Study

Abstract The paper deals with the investigation carried out to find out the possible reason of the fly rock incident causing fatality of one person at Bhurkunda ‘A´’ Colliery of Central Coalfields Limited (CCL). The flying fragment travelled up to 280 m from the blasting source causing the accidental death. The blasts were conducted in over burden rock strata consisting of medium grained sandstone and shale. The blast hole diameter used in the blast was160 mm, and the average hole depth was 6.0 m. Site mixed emulsion (SME) explosive was used in the blast, and explosive charge per hole was 50.00 kg. Non-electric initiation systems were used for in-hole explosive and surface hole-to-hole initiations. The design parameters used in the blast were thoroughly analyzed using blast simulation software to check any anomaly in the blast design viz. sequence of hole firing, success rate of burden movement, maximum charge per delay fired within 8ms windows, etc. The different fly rock fragments prediction models were used to assess the maximum possible travel distance of the flying in the blast. A synonymous blast was also conducted in the mines to replicate the blast where fly rock accident occurred. All the blasting events were recorded and monitored using a digital video camera. The simulation results of the blast showed the success rate of burden relief more than 80% with sufficient delay intervals for the rock movement during the blast. The maximum possible travel distance of flying fragments based on different fly rock prediction models was 227 m. In the synonymous blast only vertical throws of the flying fragments up to 70 m(approximate) height were observed. It was difficult to find out the exact cause of fly rock incident. However, based on the detailed investigation, it was concluded that the possible cause of flying fragments travelling up to a distance of280 m could be due to the presence of a weak zone in the rock strat

High density oxidative plasma unzipping of multiwall carbon nanotubes

We report the oxidative plasma-assisted unzipping of multiwall carbon nanotubes (MWCNTs). The exposure of oxygen plasma causes the CNTs to form initial cracks followed by the oxidation of reactive carbon species. The volatile C-O species escape and create a channel for the next oxygen molecule to diffuse into the interior of the CNT. Further oxidation results in complex C-O structures and the formation of bead like structures. These bead structures retain the strain and transform to petal like nano ribbons, releasing the excessive strain. Overall, the dimensions and morphology of the CNTs change with the two step oxidation and three step unzipping processes. The revealing of the nanostructured morphology is unique for oxygen plasma, in contrast to nitrogen and hydrogen plasma