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Search Results: 1 - 10 of 304640 matches for " K. G. Smitha "
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Experimental Investigations on Fluoride Removal from Water Using Nanoalumina-Carbon Nanotubes Blend  [PDF]
K. Smitha, Santosh G. Thampi
Journal of Water Resource and Protection (JWARP) , 2017, DOI: 10.4236/jwarp.2017.97050
Abstract: Fluoride is the most abundant, highly electronegative and geogenic contaminant in groundwater worldwide. Among the water quality parameters, the fluoride ion is unique in that it is beneficial to health if its concentration in water is within a threshold value (1.0 - 1.5 mg/l) and is detrimental (>2 ppm) if present in excess (WHO, 2006). High fluoride levels in drinking water has become a critical health hazard of this century as it induces intense impact on human health including skeletal and dental fluorosis. The objective of this study was to evaluate the potential of nanoalumina-carbon nanotubes blend as a sorbent for the removal of excess fluoride from water. Batch studies were conducted to assess the influence of various operational parameters viz. pH, temperature, agitation time, adsorbent dosage and presence of interfering ions. From the studies, it was clear that the rate of adsorption was initially rapid and attains equilibrium gradually in about 100 min. The presence of interfering ions such as chlorides and sulphates has very little effect on fluoride removal by nanoalumina-carbon nanotubes blend. Analysis of the equilibrium data fitted the Langmuir and Freundlich isotherms very well. The results of the study appear to be quite promising in the sense that they demonstrate the capability of nanoalumina-carbon nanotubes blend for removing fluorides from drinking water.
Lichen planus and hepatitis c virus (HCV) - Is there an association? A serological study of 65 cases
Prabhu Smitha,Pavithran K,Sobhanadevi G
Indian Journal of Dermatology, Venereology and Leprology , 2002,
Abstract: Sixty-five patients (48 females, 15 males and 2 children) with lichen planus were tested for anti HCV antibodies. None gave positive result.
A New Low Complexity Uniform Filter Bank Based on the Improved Coefficient Decimation Method
A. Ambede,K. G. Smitha,A. P. Vinod
Radioengineering , 2013,
Abstract: In this paper, we propose a new uniform filter bank (FB) based on the improved coefficient decimation method (ICDM). In the proposed FB’s design, the ICDM is used to obtain different multi-band frequency responses using a single lowpass prototype filter. The desired subbands are individually obtained from these multi-band frequency responses by using low order frequency response masking filters and their corresponding ICDM output frequency responses. We show that the proposed FB is a very low complexity alternative to the other FBs in literature, especially the widely used discrete Fourier transform based FB (DFTFB) and the CDM based FB (CDFB). The proposed FB can have a higher number of subbands with twice the center frequency resolution when compared with the CDFB and DFTFB. Design example and implementation results show that our FB achieves 86.59% and 58.84% reductions in resource utilizations and 76.95% and 47.09% reductions in power consumptions when compared with the DFTFB and CDFB respectively.
Modified Ceiling Bounce Model for Computing Path Loss and Delay Spread in Indoor Optical Wireless Systems  [PDF]
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.28087
Abstract: This paper proposes modifications to the tradional Ceiling Bounce Model and uses it to characterize diffuse indoor optical wireless channel by analyzing the effect of transceiver position on signal propagation properties. The modified approach uses a combination of the tradional ceiling bounce method and a statistical approach. The effects of different transmitter-receiver separations and height of the ceiling on path loss and delay spread are studied in detail.
Integrated Nutrient Management on Growth, Yield, Quality and Economics of Bhumyamalaki (Phyllanthus amarus) – An Anti-jaundice Plant
Aruna Kumar R,Raju B,Umesha K,Smitha G.R.
Open Access Journal of Medicinal and Aromatic Plants , 2011,
Abstract: Bhumyamalaki (Phyllanthus amarus Schum and Thonn) is an important anti-jaundice medicinal plant which contains several alkaloids in leaves. Phyllanthin and hypo-phyllanthin are important alkaloids having anti-hepatotoxic property. A field experiment was conducted during kharif, 2004-05 to study the response of organic and inorganic sources of nutrients on growth, yield and economics of P. amarus. Four organic sources (Farmyard manure, poultry manure, distillery bio-compost and city compost) were applied alone or super imposed over 25, 50 and 75% of recommended dose of inorganic fertilisers on N basis, and compared with control. Amongst the organic sources, the conjunctive use of 75% nutrients through fertilisers and 25% through FYM recorded maximum plant height, number of branches, number of compound leaves, fresh and dry herbage yield and total alkaloid yields (phyllanthin and hypo-phyllanthin), besides obtaining maximum net returns and highest benefit: cost ratio.
Screening and Isolation of Gasoline Degrading Bacteria by Enrichment Technique
G. Srinikethan,Madhumathi,Smitha Hegde
Iranica Journal of Energy and Environment (IJEE) , 2010,
Abstract: Gasoline a, major petroleum hydrocarbon used frequently in automobiles is a complex mixture of aliphatic, aromatic and allicyclic hydrocarbons. The general population is exposed to gasoline or gasoline vapors during automobile refueling procedures, refueling of gasoline-powered equipment and using the gasoline-contaminated surface water or groundwater. Biodegradation of gasoline holds a promising approach for handling the problems due to gasoline pollution. In the present study the soil samples from the regions around petrol stations and petroleum refinery industry located at Mangalore, Karnataka, India were collected and subjected to screening by enrichment technique. Two Gram-negative bacilli C1 and C3 were isolated from the soil samples of petrol filling stations. The gasoline biodegradation was confirmed by the gaschromatography technique. Both the organisms showed significant reduction in the peak area as compared to that of control. Both the organisms showed a good adherence to hydrocarbons.
Acute cholestatic hepatitis along with agranulocytosis: A rare side effect of carbimazole
K Jain, M Chakrapani, K Smitha
Annals of African Medicine , 2010,
Acute cholestatic hepatitis along with agranulocytosis: A rare side effect of carbimazole
Jain Karun,Chakrapani M,Smitha K
Annals of African Medicine , 2010,
Abstract: Antithyroid drugs have been used for more than 50 years for the management of hyperthyroidism. Most patients tolerate treatment well but some may develop life-threatening side effects such as agranulocytosis, aplastic anemia and cholestatic hepatitis. A 45-year-old female was diagnosed with severe hyperthyroidism. Treatment with Carbimazole 30 mg/day was initiated. Within six weeks following the start of therapy, patient developed potentially life-threatening acute cholestatic hepatitis and agranulocytosis as adverse effects to carbimazole. The patient′s symptoms and laboratory abnormalities resolved following withdrawal of offending drug. Agranulocytosis and cholestatic hepatitis together is an extremely rare idiosyncratic side effect of Carbimazole treatment and considered to be dose and age-related. Antithyroid drugs are deceptively easy to use, but because of the variability in the response of patients and the potentially serious side effects, all practitioners who prescribe the drugs need to have a working knowledge of their complex pharmacology.
Soft tissue fibrosarcoma of pre maxillary region in an adult: report of a unique pathological entity
Smitha Naik K.,Madhusudhan Astekar,Dinesh Rao
Clinics and Practice , 2012, DOI: 10.4081/cp.2012.e58
Abstract: Fibrosarcoma of the oral and maxillofacial region is a rare entity with poor prognosis. Most common sites are the extremities, with only one percent of fibrosarcoma arising in the head and neck area. Oral fibrosarcoma are locally infiltrative and destructive, spreads by haematogenous dissemination. The positive immunostaining for vimentin, together with negativity for muscular immunomarkers help to diagnosis the fibrosarcoma. Surgical management of fibrosarcoma in maxillofacial region is far from satisfactory, because of lack of inadequate clearance. This paper describes an unusual case of soft tissue fibrosarcoma of premaxillary region in an adult aged 71 years.
Random Network Behaviour of Protein Structures
Brinda K. V.,Saraswathi Vishveshwara,Smitha Vishveshwara
Quantitative Biology , 2009, DOI: 10.1039/b903019k
Abstract: Geometric and structural constraints greatly restrict the selection of folds adapted by protein backbones, and yet, folded proteins show an astounding diversity in functionality. For structure to have any bearing on function, it is thus imperative that, apart from the protein backbone, other tunable degrees of freedom be accountable. Here, we focus on side-chain interactions, which non-covalently link amino acids in folded proteins to form a network structure. At a coarse-grained level, we show that the network conforms remarkably well to realizations of random graphs and displays associated percolation behavior. Thus, within the rigid framework of the protein backbone that restricts the structure space, the side-chain interactions exhibit an element of randomness, which account for the functional flexibility and diversity shown by proteins. However, at a finer level, the network exhibits deviations from these random graphs which, as we demonstrate for a few specific examples, reflect the intrinsic uniqueness in the structure and stability, and perhaps specificity in the functioning of biological proteins.
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