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Search Results: 1 - 10 of 138817 matches for " K. K. Panicker "
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Observation on the host parasitoid interaction between Periplaneta americana, the American cockroach and Tetrastichus hagenowii, an oothecal parasitoid
Srinivasan, R.;Panicker, K. N.;
Memórias do Instituto Oswaldo Cruz , 1994, DOI: 10.1590/S0074-02761994000300022
Abstract: investigations were carried out on the host parasitoid interaction between periplaneta americana, the american cockroach and tetrastichus hagenowii, an oothecal parasitoid. this gregarious female parasitoid infected and or oviposited in only one host and caused 100 por cento mortality of the infected host. however, increase in parasitoid density decreased the progeny production and influenced the sex ratio. the progenies produced were male biased. when host preference was tested by offering oothecae of different species of cockroaches, t. hagenowii showed a predilection towards the oothecae of p. americana, suggestings its host specificity.
Prashant S. Kharde,Vidyadhar B Bangal,K. K. Panicker
International Journal of Biomedical and Advance Research , 2012, DOI: 10.7439/ijbar.v3i4.426
Abstract: Background:- Iron deficiency is the principle cause for nutritional anemia. The aim of the study was to compare the efficacy of oral iron therapy with intravenous iron therapy in the treatment of iron deficiency anemia during postpartum periodMaterial and Methods:- A clinical observational studY.Results :-.On day 5 of the intravenous iron group , there was statistically significant increase in serum ferritin level from 11.47 +1.655 μg/l to 41.44 +6.500 μg/l (p value <0.01), and the ferritin level remained elevated on day 14 and day 40. There was significant increase in mean Hb level from 7.76+0.7137 g/dl to 10.78+0.7679 g/dl on day 40 (p value < 0.01) in oral iron group. There was increase in mean Hb level from7.47+0.7678 g/dl to 11.41+0.7908 g/dl on day 40 in injectable iron group ,which was statistically significant. (p value < 0.01) Intravenous iron sucrose did not result in any serious adverse reactions.Conclusion:- Intravenous iron sucrose administration increases the hemoglobin level and serum ferritin levels more rapidly ,without any serious adverse effect in comparison with oral ferrous sulphate in women with iron deficiency anemia in the postnatal period .
Morbidity predictors in ischemic stroke
Panicker J,Thomas M,Pavithran K,Nair D
Neurology India , 2003,
Abstract: Background: Although ischemic CVA is one of the leading causes for death and disability, parameters for predicting long-term outcome in such patients have not been clearly delineated, especially in the Indian context. Methods: A prospective hospital-based study of 105 patients of ischemic stroke, focal neurological deficits and functional score was assessed and the C-reactive protein level (CRP) was measured. A follow-up was done at 5 days and at 6 months and outcome variable was the functional status at 6 months using Barthel Index of Activities of Daily Living. Accordingly, patients were grouped into 3 - Barthel Index < 41: Severely disabled, Barthel Index 41-60: Moderately disabled and Barthel Index > 60: Mildly disabled. Results: At admission, if upper limb power was less than Medical Research Council (MRC) grade 4, or aphasia was present or CRP assay was positive, then at 6 months, these patients most likely belonged to the severely disabled group. If upper limb or lower limb power was greater than MRC grade 3 or there was no aphasia or conjugate gaze deviation or CRP assay was negative, these patients most likely belonged to the mildly disabled group at 6 months. Follow-up rate was 86%. Conclusion: Patients can be stratified according to the predicted prognosis. The treatment and rehabilitation can be properly planned and strictly adhered to in patients predicted to have worse prognosis.
Authors' Reply
Panicker J,Thomas M,Pavithran K,Nair M
Neurology India , 2003,
Angulated Giant Cell with Clefting: A Clue to the Diagnostic Dilemma of Nodular Tenosynovitis
Archana C. Buch,N.K. Panicker,Ruchika A. Saluja
Journal of Medical Sciences , 2011,
Abstract: Nodular Tenosynovitis (NTS) is a fairly common soft tissue lesion, often diagnosed as benign lesion clinically. Occasionally these, especially the recurrent lesions may mimic a malignant tumor, clinically and to a certain extent histologically. To highlight the characteristic morphological features especially of the angulated and kite shaped giant cells with clefting and review the probable histiogenesis. Twenty one cases of NTS encountered in our centre over a period of 7 years including two recurrent lesions, closely mimicking melanoma and Malignant Fibrous Histiocytoma (MFH) were included in the study. Characteristic histological features with special attention to the morphology of the giant cells were observed and studied. These tumors are fairly easily recognisable histologically. The variable histomorphological features are described and those of diagnostic help highlighted, especially when one come across a highly cellular recurrent lesion mimicking malignancy. We have observed that giant cells are sparse in some tumors. When present, they are not the classical osteoclastic type, having fewer nuclei (average: 13). They have a peculiar angulated rather than smooth rounded border (64% angulated) with cleftin. (88% clefted). Awareness of the typical presentation, location and characteristic morphology should make the lesion easily recognizable. In a typical or recurrent lesions, a careful search for the sparsely distributed giant cell with a peculiar shape, presence of foamy histiocytes and iron demonstrable with a simple iron stain can resolve the dilemma, if any.
The Influence of A-site Ionic Radii on the Magnetic Structure of Charge Ordered La0.5Ca0.5-xSrxMnO3 Manganites
Indu Dhiman,A. Das,P. K. Mishra,L. Panicker
Physics , 2008, DOI: 10.1103/PhysRevB.77.094440
Abstract: The influence of the A-site ionic radii () on the magnetic structure has been investigated in La0.5Ca0.5-xSrxMnO3 compounds (0 .GE. x .LE. 0.5) using neutron diffraction, magnetization, and resistivity techniques. All compounds in the composition range x .LE. 0.3 crystallize in the orthorhombic structure (Space Group Pnma). No further structural transition is observed as temperature is lowered below 300K. The compound x = 0.4, is a mixture of two orthorhombic phases crystallizing in Pnma and Fmmm space group. The x = 0.5 compound has a tetragonal structure in the space group, I4/mcm. The charge ordered (CO) state with CE-type antiferromagnetic order remains stable for x .LE. 0.3. Above x = 0.3, the CE-type antiferromagnetic state is suppressed. In x = 0.4 compound, A-type antiferromagnetic ordering is found at temperatures below 200K. Orbital ordering accompanying the spin ordering is found in all the samples with x .LE. 0.4. The system becomes ferromagnetic at x = 0.5 and no signature of orbital ordering is observed. As a function of , the charge ordered state is stable up to ~ 1.24A, and is suppressed thereafter. The magnetic structure undergoes a transformation from CE-type antiferromagnetic state to a ferromagnetic state with an intermediate A-type antiferromagnetic state.
IR, Raman and SERS spectra of 2-(methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzene carboxylic acid
Raj, Asha;Raju, K.;Varghese, Hema Tresa;Granadeiro, Carlos M.;Nogueira, Helena I. S.;Panicker, C. Yohannan;
Journal of the Brazilian Chemical Society , 2009, DOI: 10.1590/S0103-50532009000300021
Abstract: 2-(methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzenecarboxylic acid was prepared by nucleophilic substitution. ft-ir and ft-raman spectra of 2-(methoxycarbonylmethylsulfanyl)-3,5-dinitrobenzenecarboxylic acid were recorded and analyzed. surface enhanced raman scattering (sers) spectrum was recorded on a silver colloid. the vibrational wavenumbers were computed by density functional theoretical (dft) computations at the b3lyp/6-31g* level and they were found to be in good agreement with the experimental values. significant metal-molecule interaction has been substantiated by the appearance of intense ag-o mode in the sers spectrum and this is indicative of the nearness of nitro and carbonyl group to the silver surface. sers studies suggest a tilted orientation of the molecule at the metal surface.
Vibrational Spectroscopic Study of (E)-4-(Benzylideneamino)-N-Carbamimidoyl Benzenesulfonamide
Asha Chandran,Sheena Mary,Hema Tresa Varghese,C. Yohannan Panicker,T. K. Manojkumar,Christian Van Alsenoy,G. Rajendran
ISRN Analytical Chemistry , 2012, DOI: 10.5402/2012/397026
Abstract: The Fourier transform infrared and Fourier transform Raman spectra of (E)-4-(benzylideneamino)-N-carbamimidoyl benzenesulfonamide were recorded and analyzed. Geometry and harmonic vibrational wavenumbers were calculated theoretically using Gaussian 03 set of quantum chemistry codes. Calculations were performed at the Hartree-Fock (HF) and density functional theory (DFT; B3PW91, B3LYP) levels of theory. The calculated wavenumbers (B3LYP) agree well with the observed wavenumbers. Potential energy distribution is done using GAR2PED program. The red shift of the N-H stretching band in the infrared spectrum from the computed wavenumber indicates the weakening of the N-H bond. The geometrical parameters of the title compound are in agreement with that of reported similar derivatives. The calculated first hyperpolarizability is comparable with the reported value of similar derivative and may be an attractive object for further studies of nonlinear optics. Potential energy surface scan studies have been carried out to understand the stability of planar and nonplanar structures of the molecule. 1. Introduction Benzenesulfonamide derivatives find wide applications for the synthesis of pharmaceutical products which have bactericidal properties and of various bioactive agents, artificial fibers, dyes, and plasticizers, and the synthesis of high molecular weight substances. Sulfonamides are chemotherapeutics most commonly used in veterinary practices because of their inexpensiveness and wide spectrum antimicrobial activity [1]. Sulfonamides represent one of the classical chemotypes associated with potent CA inhibition [2–5]. The chemistry of sulfonamides has been known as synthons in the preparation of various valuable biologically active compounds [6, 7] used as an antibacterial [8], protease inhibitor [9], diuretic [10], antitumor [11], and hypoglycaemic [12]. Singh et al. [13] reported the synthesis and antimicrobial activity of Schiff’s and N-Mannich bases of Isatin and its derivatives with 4-amino-N-carbamimidoyl benzene sulfonamide. There has been growing interest in using organic materials for nonlinear optical (NLO) devices, functioning as second harmonic generators, frequency converters, electro-optical modulators, and so forth because of the large second order electric susceptibilities of organic materials. The organic compound showing high hyperpolarizability are those containing an electron-donating group and an electron-withdrawing group interacting through a system of conjugated double bonds. In the case of sulfonamides, the electron-withdrawing group
Acute disseminated encephalomyelitis
Panicker J
Annals of Indian Academy of Neurology , 2007,
Abstract: Acute disseminated encephalomyelitis (ADEM) presents as an acute-onset neurological dysfunction following a triggering event such as an infection or vaccination. Patients present with polysymptomatic neurological dysfunction, and imaging shows multifocal white matter lesions in the brain and spinal cord. Clinical evaluation, magnetic resonance imaging, and cerebrospinal fluid study are most useful in establishing the diagnosis and ruling out important differential diagnoses. Corticosteroids are the mainstay of treatment and the role of other modalities of treatment, such as plasma exchange and intravenous immunoglobulin, require further study. Prognosis is generally good. The recently proposed consensus definitions are likely to facilitate delineation of ADEM from other acquired demyelinating disorders.
The Constrained Mean-Semivariance Portfolio Optimization Problem with the Support of a Novel Multiobjective Evolutionary Algorithm  [PDF]
K. Liagkouras, K. Metaxiotis
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.67B005

The paper addresses the constrained mean-semivariance portfolio optimization problem with the support of a novel multi-objective evolutionary algorithm (n-MOEA). The use of semivariance as the risk quantification measure and the real world constraints imposed to the model make the problem difficult to be solved with exact methods. Thanks to the exploratory mechanism, n-MOEA concentrates the search effort where is needed more and provides a well formed efficient frontier with the solutions spread across the whole frontier. We also provide evidence for the robustness of the produced non-dominated solutions by carrying out, out-of-sample testing during both bull and bear market conditions on FTSE-100.

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