Utility of natural generalised inverse technique in the interpretation of dyke structures

285-298Forward and Inverse methods of magnetic interpretation have been used to estimate the parameters of dyke like intrusion over the eastern continental shelf of India. In the forward problem, the tentative parameters of the causative source are assumed and anomalies are calculated using the anomaly equation, while inverse problem refers to methods of tracing the boundaries or outlines of anomalous bodies using an iterative approach. While solving the inverse problem, data kernel has been generated through the model (i.e. partial derivatives of magnetic anomaly function with respect to model parameters at each station forming the kernel). In solving the coupled eigenvalue problem of covariance matrices of data kernel, Singular Value Decomposition (SVD) has been performed to build Generalised Inverse Operator (GIO). This GIO is operated on the observed anomaly (with reference to the calculated) to yield improved model parameters. Data and model resolution matrices are computed to check the correctness of the solution and further analysis. The marine magnetic total field anomaly of continental shelf of Visakhapatnam is interpreted using GI technique, which revealed the causative source of the anomaly as a dyke model at a depth of 120 m below seabed

Advantages of FCCA and Bi promotion in Bi-Pd/FCCA catalysts for the hydrodechlorination of CCl2F2

The incorporation of bismuth in fluorinated carbon covered alumina (FCCA) supported Pd catalysts has shown to increase significantly the catalytic activity in the hydrodechlorination of CCl2F2 and CH2F2 selectivity. During the prepn. of FCCA, the formation of a-AlF3 and carbon coverage on alumina has helped in creating the extra acidity and in minimizing the support active component interaction resp. XRD data shown the formation of interacted species, BiPd3 between Pd and Bi. XPS anal. shows that in Pd/FCCA spent catalyst, Pd is transformed into Pd halides whereas in the Bi-Pd/FCCA spent catalysts Pd maintains its metallic state even in presence of corrosive reaction atm. Bi-promoted catalysts exhibited higher selectivity towards CH2F2 at Bi/Pd=0.5 and good thermal stability in the hydrodechlorination of CCl2F2. [on SciFinder (R)

Advantages of FCCA and Bi promotion in Bi-Pd/FCCA catalysts for the hydrodechlorination of CCl2F2

The incorporation of bismuth in fluorinated carbon covered alumina (FCCA) supported Pd catalysts has shown to increase significantly the catalytic activity in the hydrodechlorination of CCl2F2 and CH2F2 selectivity. During the prepn. of FCCA, the formation of a-AlF3 and carbon coverage on alumina has helped in creating the extra acidity and in minimizing the support active component interaction resp. XRD data shown the formation of interacted species, BiPd3 between Pd and Bi. XPS anal. shows that in Pd/FCCA spent catalyst, Pd is transformed into Pd halides whereas in the Bi-Pd/FCCA spent catalysts Pd maintains its metallic state even in presence of corrosive reaction atm. Bi-promoted catalysts exhibited higher selectivity towards CH2F2 at Bi/Pd=0.5 and good thermal stability in the hydrodechlorination of CCl2F2. [on SciFinder (R)

Basement configuration of Visakhapatnam – Paradip continental margin from inversion of magnetic anomalies

176-178<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:black;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">Inversion of magnetic data was carried out on 40 profiles collected across the continental margin of Visakhapatnam at a spacing of about 10 km and magnetic basement map for this region is prepared. The map reveals complex anomalies particularly beneath the inner shelf with amplitudes reaching as high as 1800nT. These anomalies appear to be associated with the complex basement structure reported earlier. The significant features inferred include, (a) a shallow and highly faulted basement, in the inner shelf; (b) a NE-SW ridge-trough configuration in the mid shelf; (c) NW-SE trending basement upward off Bhimunipatnam to Kalingapatnam and (d) N-S trending shallow basement trend off Chilka lake.</span

Synthesis, spectroscopic and anti tumor studies on copper(II) complex of orthohydroxypropiophenoneisonicotinoylhydrazone

Orthohydroxypropiophenoneisonicotinoylhydrazone ligand(L) has been synthesized from orthohydroxypropiophenone and isonicotinicacid hydrazide. The Cu(II) complex is prepared and structurally characterized. The structure of the ligand(L) is proposed based on elemental analysis, IR and mass spectra and Cu(II) complex is characterized from the studies of electronic spectra, EPR spectra, powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). On the basis of electronic and EPR studies, rhombically distorted octahedral environment has been proposed for the Cu(II) ion. The powder X-ray diffraction data indicate triclinic structure with the unit cell parameters: a = 9.4734 Å, b = 6.1588 Å, c = 3.9254 Å, and V = 195.6 Å3 for the complex. The ligand and Cu(II) complex have been tested for in vitro antibacterial, antioxidant and cytotoxic activities. The results reveal that the Cu(II) complex exhibits greater activity than the free ligand

Objective mapping of observed sub-surface mesoscale cold core eddy in the Bay of Bengal by stochastic inverse technique with tomographically simulated travel times

307-324Present study consists the acoustic characteristics of a sub-surface cold core eddy observed (below the mixed layer between depths of 50 and 300m, with a diameter of about 200 km having temperature drop of 5ºC at the center) in the Bay of Bengal during south-west monsoon season and explore possibility to reconstruct the acoustic profile of the eddy by Stochastic Inverse Technique. A simulation experiment on forward and inverse problems for observed sound velocity perturbation field has been attempted for a range of 650 km (in the vertical slice) keeping the single source-receiver configuration (at the channel axis depth) in the SOFAR channel, under peculiar characteristics viz, depth-limited environment and weak gradient waters of the Bay of Bengal. For the formulation of the Stochastic Inverse, both vertical and horizontal structure of the ocean has been modeled using empirical orthogonal modes. Present Ocean Acoustic Tomography’s (OAT’s) simulation experiment results reveal that one can objectively map/monitor even the small mesoscale sub-surface eddies by stochastic inverse technique keeping single source and receiver in the SOFAR channel separated probably by larger distances also under such depth-limited environment of the Bay of Bengal