Browsing by Title
Now showing items 6603-6622 of 9167
-
Quantitative estimation of seafloor features from photographs and their application to nodule mining
(Taylor and Francis, 1993)Methods developed for quantitative estimation of seafloor features from seabed photographs and their application for estimation of nodule sizes, coverage, abundance, burial, sediment thickness, extent of rock exposure, ... -
Quantitative estimation of sediment erosion and accretion processes in a micro-tidal coast.
(Elsevier, 2014)Spatio-temporal cross-shore profiles and textural characteristics are the key parameters for understanding dynamics of the inter-tidal sedimentary environment. This study describes short-term dynamics of the inter-tidal ... -
Quantitative radiolarian assemblages in surface sediments from the central Indian Basin and their paleomonsoonal significance
(Geological Society of India, 1996)The percentage data of 47 radiolarian coarser taxonomic groups in the surface sediments from the central Indian Basin was subjected to cluster and factor analyses. The R-mode cluster analysis resulted in 3 dominant clusters ... -
Quantitative seafloor characterization using angular backscatter data of the multi-beam echo-sounding system - Use of models and model free techniques
(Allied, India, 2003)For quantitative seafloor roughness characterization and classification using multi-beam processed backscatter data, a good correlation is indicated among the power law parameters (composite roughness model) and hybrid ANN ... -
Quantitative studies on benthic macrofauna of North-Eastern Arabian Sea shelf
(CSIR-NISCAIR, 1975) -
Quartz and feldspar distribution in continental shelf sediments of east coast of India
(NISCAIR, CSIR, 1990) -
Quasi-biweekly oscillation in sea level along the western Bay of Bengal
(Elsevier, 2021)This study investigates the variability and sources of Quasi-Biweekly (QB) oscillation (10-20 days) in coastal sea level along the western boundary of the Bay of Bengal (BoB) using tide-gauge data and simulations from a ... -
Quasi-biweekly oscillations in the Bay of Bengal in observations and model simulations
(Elsevier Ltd, 2019)Intraseasonal oscillations (ISOs) significantly contribute to the variability and strength of rainfall associated with the Indian Summer Monsoon. The westward-propagating, 10-20-day, quasi-biweekly ISO (QBWISO), in association ... -
Quaternary carbonate record from the equatorial Indian Ocean and its relationship with productivity changes
(Elsevier, 1999)The CaCO sub(3) content in Quaternary deep-sea sediments from Pacific and Atlantic oceans have been suggested to respond differently to glacial/interglacial cycles; CaCO sub(3), contents are highest during glacials in ... -
Quaternary changes in paleomonsoon: Evidences from seas
(Geological Survey of India, 2001) -
Quaternary climate modulation of Pb isotopes in the deep Indian Ocean linked to the Himalayan chemical weathering
(Elsevier, 2015)We use reductive sediment leaching to extract lead (Pb) from the authigenic fraction of marine sediments and reconstruct the Pb isotope evolution of the deep central Indian Ocean over the past 250 thousand years at ~3 kyr ... -
Quaternary phosphorites from the continental margin off Chennai, southeast India: Analogs of ancient phosphate stromatolites
(SEPM, Society for Sedimentary Geology, 2000)Pleistocene phosphorites occur on the continental margin off Chennai abundantly in the depth range of 186-293 m. They are associated with outer-shelf glauconites and carbonate skeletals including large shells of molluscs ... -
Quaternary phosphorites off the southeast coast of India
(Elsevier, 2002)Detailed petrological, mineralogical, geochemical and radiogenic (U, Sr, Nd) and stable isotope (C, O, S) studies have been carried out on the Quaternary phosphorites of the continental margin off Chennai, southeast coast ... -
Quaternary radiolarian faunal changes in the tropical Indian Ocean: Inferences to paleomonsoonal oscillation of the 10 degrees S hydrographic front
(Current Science Association, Bangalore, 1997)The northern Indian Ocean is characterized by three distinct surface water masses, i.e. (1) highly saline (greater than 34.5 ppt) Arabian Sea, (2) low saline (less than 34.5 ppt) Bay of Bengal and (3) a moderate salinity ... -
Quick elucidation of cyclodepsipeptide sequence from sacoglossan Elysia grandifolia using electrospray ionisation-tandem mass spectrometry
(Sage Publications, 2017)Butanol fraction of sacoglossan Elysia grandifolia was investigated for identifying peptides using electrospray ionisation-tandem mass spectrometry (ESI-MS/MS). Without prior isolation, the structural determination is ... -
Quinolizidine Alkaloids from Marine Organisms: A Perspective on Chemical, Bioactivity and Synthesis
(Bentham Science Publisher, 2021)Marine organisms produce numerous secondary metabolites that exhibit a wide range of biological activities, which have applications in pharmaceutical research. Numerous secondary metabolites have been discovered from various ... -
Quinolizidines alkaloids: Petrosin and xestospongins from the sponge Oceanapia sp.
(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- ... -
Rabbit-core based sea-level logger using semiconductor transducer
(Allied, India, 2003)A sea level logger based on Rabbit-Core micro-controller module has been designed and tested. The transducer used with the logger is a temperature-compensated semiconductor transducer, providing absolute fluid pressure in ... -
Rabin Sen Gupta - A biography
(Elsevier, 1994) -
Radiocarbon dates of the medieval period stone anchors from Dabhol, west coast of India
(Current Science Association, 2009)Dabhol was an important medieval-period port town on the Maharashtra coast. An archaeological exploration at Dabhol has revealed four stone anchors with remains of wood in fluke hole. These anchors were retrieved from ...