Browsing by Author "Stephen, S"
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Item Acinetobacter calcoaceticus infection in and around manipal (Karnataka).(1983-01-01) Kulachandra Singh, M; Kireeti, J; Joseph, A; Subbannayya, K; Stephen, S; Rao, K NItem Bronchopulmonary geotrichosis.(1975-02-01) Rao, K N; Ullal, S R; Stephen, SItem Brucellosis in fowls--a preliminary communication.(1978-11-01) Stephen, S; Indrani, R; Chandrashekara, I; Rao, K NItem Characterization of Vibrio alginolyticus (Beneckea alginolytica) isolated from the fauna of Arabian sea.(1978-07-01) Stephen, S; Vaz, A L; Chandrashekara, I; Achyutha Rao, K NItem Complement fixing and agglutinating antibodies to Coxiella burnetii in several mammals of Karnataka State.(1979-12-01) Stephen, S; Chandrashekara, I; Rao, K NItem Coxiellosis in fowls of Karnataka State.(1980-03-01) Stephen, S; Chandrashekara, I; Rao, K NItem Coxiellosis in reptiles of South Kanara district, Karnataka.(1979-12-01) Stephen, S; Rao, K NItem Detection of acute Q fever human cases by indirect immunofluorescence & real-time polymerase chain reaction in a tertiary care hospital in Puducherry(Indian Council of Medical Research, 2018-10) Pradeep, J; Kumar, S; Stephen, S; Kamboj, DV; Gunasekaran, D; Hanifah, MItem Drug resistant shigellosis in south India.(1978-09-01) Paniker, C K; Vimala, K N; Bhat, P; Stephen, SItem Enteropathic Escherichia coli serotypes from various clinical specimens.(1978-10-01) Stephen, S; Indrani, R; Chandrashekra, I; Vaz, A L; Rao, K NItem Extra pulmonary tuberculosis: Rapid identification of Mycobacterium tuberculosis grown in Mycobacterium growth indicator tube 960 and Lowenstein-Jensen media, employing Standard diagnostics Bioline Mycobacterium tuberculosis protein 64 antigen detection kit.(2015-02) Kandhakumari, G; Stephen, SBackground: Investigation of extra pulmonary tuberculosis (EPTB) in and around Pondicherry is being carried out since August 2011 in our tertiary care super specialty hospital. Objectives: To compare the rapid Kit SD Bio-Line MPT 64 Ag with conventional and time consuming biochemical tests. Confi rmation of Mycobacterium tuberculosis at a reasonable time frame is the main thrust. Materials and Methods: Thirty three Mycobacterium tuberculosis and four Non-Tuberculous Mycobacteria (NTM) grown in MGIT960 system/Lowenstein-Jensen media (LJ) were examined by the rapid MPT 64 antigen detection as well as a battery of conventional tests like niacin, nitrate reduction, paraminobenzoic acid susceptibility and cord formation. Results and Conclusion:. Both the rapid kit and conventional tests correctly identifi ed 33 M.tuberculosis isolates. Keeping conventional identifi cation as reference, sensitivity and specifi city for rapid kit was 100%. Rapid kit which takes only 15 minutes is accurate, cost effective, and facilitates early treatment for these EPTB patients, whose clinical specimens are paucibacillary.Item Framycetin sensitivity of 100 multiple drug-resistant bacteria.(1974-08-01) Stephen, S; Achyutha Rao, K NItem Investigation into the source of epidemics of infantile gastroenteritis in Coondapur.(1975-11-01) Rao, K N; Stephen, S; Agadi, B M; Nageshwar, B; Subramanyam, Y; Baliga, MItem Kinetic Study of Neem Biodiesel Production.(2013-10) Elkadi, M; Pillay, A E; Manuel, J; Stephen, S; Khan, M ZAims: The kinetic features of neem biodiesel production were studied to establish the conversion parameters that govern optimal product yield in minimum reaction span. The mechanistic features of the dual acid/base catalytic conversion were investigated to gain an insight into the influence of methoxide nucleophilic attack and catalytic restoration on reaction yield in the final stage. Study Design: The reaction kinetics was investigated by UV-Vis absorption spectrophotometry. Neem biodiesel was extracted from neem oil via a two-stage chemical process. The neem oil feedstock is comparatively high in free fatty acids and its reduction is facilitated by an initial acid-catalysed pre-treatment. The second stage constitutes basecatalyzed transesterification to neem biodiesel and the glycerol by-product at 55ºC. The kinetic study focused on the second stage, which is underexplored with neem oil. Place and Duration of Study: Chemistry Department, Arts and Sciences, The Petroleum Institute, Abu Dhabi, UAE. Methodology: Suitable time intervals were selected to monitor the transesterification, and the absorbances of the resulting biodiesel were recorded in the far visible region at 700 nm (max.). Results: It was found that the base-catalyzed reaction is rapid (<300 s) at the stipulated temperature and reaches completion after significant conversion to the biodiesel product. Absorbances were recorded after 1-minute cooling in an ice-water bath. Graphical delineation of the results revealed that the transesterification step conforms to zero-order kinetics. The difficulty encountered in making measurements was the fluctuating absorbances due to the separation of the phases – the rising biodiesel and the sinking glycerol. Conclusion: The purpose of this study assists in defining the rate determining stage associated with the process. The biodiesel yield is 65% and inhibition of the reaction at lower temperatures or introduction of an inhibitor could be considered to prolong the final stage to acquire improved biodiesel yields.Item Natural occurrence of Coxiella burnetii in domestic mammals of Karnataka State.(1980-04-01) Stephen, S; Chandrashekara, I; Rao, K G; Rao, K NItem Natural occurrence of Coxiella burnetii in the brown dog tick Rhipicephalus sanguineus.(1980-06-01) Stephen, S; Chandrashekara, I; Rao, K NItem Natural occurrence of spotted fever group rickettsiae in the dog flea Ctenocephalides canis in Karnataka.(1980-06-01) Stephen, S; Rao, K NItem Prevalence of human Q fever in south Kanara district, Karnataka.(1980-04-01) Stephen, S; Chandrashekara, I; Rao, H L; Rao, K G; Rao, K NItem Q fever antibodies in domestic animals in south Kanara--a preliminary report.(1978-07-01) Stephen, S; Indrani, R; Achyutha Rao, K NItem Q fever in India: a review.(1980-05-16) Stephen, S; Achyutha Rao, K N