Browsing Scholarly literature by Author "Naik, C.G."
Now showing items 21-40 of 52
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Diffuse reflectance infrared fourier transform spectroscopic (DRIFTS) investigation of E.coli, Staphylococcus aureus and Candida albicans
DeSouza, L.; PrabhaDevi; Kamat, T.; Naik, C.G. (NISCAIR, India, 2009)The present study consists of a refined method for obtaining Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) data for biological samples in the mid infrared region (4000 - 600 cm sup(-1)). The biological ... -
Echinoside-B from the Lakshadweep sea cucumber Actinopyga mauritiana (Quoy and Gaimard)
Parameswaran, P.S.; Naik, C.G.; Das, B.; Kamat, S.Y. (NISCAIR, New Delhi, 1991)Brine-shrimp assay guided purification of the methanolic extract of the sea cucumber Actinopyga mauritiana yields echinoside-B as a major toxic constituent. The compound has been characterized based on its spectral data. -
Effect of soft coral extracts on isolated tissues
PrabhaDevi; Jayasree, V.; Naik, C.G. (National Institute of Ocean Technology, 2004)Methanolic extracts of eleven species of soft corals collected from Lakshwadeep islands in the Arabian Sea and Mandapam in the east coast of India were tested for their antispasmodic, antiarrhythmic and oxytocic activity ... -
Four marine-derived fungi for bioremediation of raw textile mill effluents
Verma, A.K.; Raghukumar, C.; Verma, P.; Shouche, Y.S.; Naik, C.G. (Elsevier, 2010)Textile dye effluents pose environmental hazards because of color and toxicity. Bioremediation of these has been widely attempted. However, their widely differing characteristics and high salt contents have required ... -
Fungal metabolites: Tetrahydroauroglaucin and isodihydroauroglaucin from the marine fungus,iEurotium sp.
Gawas, D.; PrabhaDevi; Tilvi, S.; Naik, C.G.; Parameswaran, P.S. (Allied Publishers; New Delhi (India), 2002)Two poly substituted aromatic compounds: tetrahydroauroglaucin 1 and isodihydroauroglaucin 2 were identified from a marine fungus, Eurotium sp. isolated from leaves of the mangrove, Porteresia coarctata (Roxb). These ... -
Harmful algal blooms
Bhat, S.R.; PrabhaDevi; DeSouza, L.; Verlecar, X.N.; Naik, C.G. (TERI Press, India, 2006)Phytoplankton or micro-algae play a vital role as primary producers in all aquatic habitats, but when their population overwhelms other forms of aquatic life, an environmental and economic impact is likely. Very prominent ... -
Isolation and characterization of antibacterial compound from a mangrove-endophytic fungus, Penicillium chrysogenum MTCC 5108
PrabhaDevi; Rodrigues, C.; Naik, C.G.; DeSouza, L. (Association of Microbiologists of India, 2012)Microorganisms, especially endophytic fungi that reside in the tissue of living mangrove plants, seem to play a major role in meeting the general demand for new biologically active substances. During the course of screening ... -
Isolation of 2-deoxyecdysterone, a novel oxytocic agent, from a marine Zoanthus sp.
Parameswaran, P.S.; Naik, C.G.; Gonsalves, C.; Achuthankutty, C.T. (Indian Institute of Science, 2001)The insect-moulting hormone 2-deoxyecdysterone (2-deoxy-20-hydroxyecdysone 1) has been isolated for the first time and in relatively high yield (0.016%) from a marine Zoanthus sp. The compound exhibited promising oxytocic ... -
Marine natural products. 2. Characterisation of lipid fraction from the sony coral Porites lutea
Naik, C.G.; Parameswaran, P.S.; Das, B. (Current Science Association, 1984) -
Marine natural products. Part 1. Occurrence of Batyl alcohol and Brassicasterol in Porites lutea
Naik, C.G.; Kamat, S.Y.; Topgi, R.S. (CSIR-NISCAIR, 1982) -
Marine-derived fungi as a source of proteases
Kamat, T.; Rodrigues, C.; Naik, C.G. (NISCAIR, CSIR, 2008)Microbial enzymes have continued to assist diverse reactions as biocatalysts. Marine derived microbes offer a prospective resource for such enzymes. In this study thirteen fungi were isolated from marine organisms (soft ... -
Minor sterols from the sponge Ircinia ramosa (Killer)
Parameswaran, P.S.; Naik, C.G.; Das, B.; Kamat, S.Y. (Oxford and IBH, New Delhi, 1992)Three sterols, isolated from the lipid fraction of the sponge Ircinia ramosa were characterised as cholest-5-en-3 beta-ol-7-one (7-oxo cholesterol, 1), cholest 5-23-dien-b beta ol-7-one (7-oxo demosterol, 2) and 24E-ethyl ... -
New bioactive hydrogenated linderazulene-derivatives from the gorgonian Echinogorgia complexa
Manzo, E.; Ciavatta, M.L.; Gresa, M.P.L.; Gavagnin, M.; Villani, G.; Naik, C.G.; Cimino, G. (Elsevier, 2007)Chemical analysis of the secondary metabolite pattern of the gorgonian Echinogorgia complexa, collected along South Indian coasts, showed the presence of two new tricyclic guaiane furanosesquiterpenes, iso-echinofuran (3) ... -
New bromotyrosine alkaloids from the marine sponge Psammaplysilla purpurea
Tilvi, S.; Rodrigues, C.; Naik, C.G.; Parameswaran, P.S.; Wahidullah, S. (Elsevier, 2004)Seven new bromotyrosine alkaloids Purpurealidin A, B, C, D, F, G, H and the known compounds Purealidin Q, Purpurealidin E, 16-Debromoaplysamine-4 and Purpuramine I have been isolated from the marine sponge Psammaplysilla ... -
Propagation of tides in the Mandovi-Zuari estuarine network
Shetye, S.R.; Gouveia, A.D.; Singbal, S.Y.S.; Naik, C.G.; Sundar, D.; Michael, G.S.; Nampoothiri, G. (ICMAM-PD, Chennai (India), 1999)The propagation of tides in the Mandovi-Zuari estuarine network was studied based on the hydrographic observations; mathematical modelling; and chemistry of estuaries. The data was collected during the dry and wet season. ... -
Propagation of tides in the Mandovi-Zuari estuarine network
Shetye, S.R.; Gouveia, A.D.; Singbal, S.Y.S.; Naik, C.G.; Sundar, D.; Michael, G.S.; Nampoothiri, G. (Indian Academy of Sciences, Bangalore, India, 1995)Located in Goa on the west coast of India and joining the Arabian Sea, the Mandovi and the Zuari are two estuaries, each about 50 km long, connected by a narrow canal. A number of small rivers join the two estuaries, forming ... -
Quinolizidines alkaloids: Petrosin and xestospongins from the sponge Oceanapia sp.
Singh, K.S.; Das, B.; Naik, C.G. (Indian Academy of Sciences, 2011)A bisquinolizidine alkaloid, petrosin (1) and a series of bis-1-oxaquinolizidine, xestospongins (2–9), were obtained from the ethyl acetate extract of the sponge Oceanapia sp. Petrosin was obtained along with xestospongin- ... -
Renieramycins H and I, two novel alkaloids from the sponge Haliclona cribricutis Dendy
Parameswaran, P.S.; Naik, C.G.; Kamat, S.Y.; Pramanik, B.N. (NISCAIR, CSIR, 1998)The known alkaloid, mimosamycin 1, along with its moon- and di hydroxy derivaties, 4-hydroxy mimosamycin 2 and 1, 4-dihydroxymimosamycin 3 and two new dimeric alkaloids: namely renieramycins H and I 4 and 5 have been ... -
Secondary metabolites from the gorgonian Echinomuraceae splendens (Thomson and Simson)
Parameswaran, P.S.; Naik, C.G.; Govenkar, M.B. (NISCAIR, CSIR, 2002)Two xanthine derivatives, caffeine (1,3,7-trimethyl-xanthine 1) and its 2-O-methyl analog 2, N-methylpyrazole-5-carboxylic acid 3 and a tetrahydroxysterol, 1b, 3b, 5a, 6b-tetrahydro-xycholes-ane 4 have been isolated from ... -
Secondary metabolites from the sponge Tedania anhelans: Isolation and characterization of two novel pyrazole acids and other metabolites
Parameswaran, P.S.; Naik, C.G.; Hegde, V.R. (American Chemical Society, 1997)Chemical investigation of the methanol extract of the sponge Tedania anhelans yielded the two unusual heteroaromatic acids, pyrazole-3(5)-carboxylic acid (2) and 4-methylpyrazole-3(5)-carboxylic acid (3), which are reported ...