DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 6521-6540 of 9443
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Role of bacteria in DMS(P) cycle
(Solas, 2006)Dimethyl sulphide (DMS) was reported in oceanic waters by Lovelock et al., (1972). Its precursor Dimethyl sulfoniopropionate (DMSP) is ubiquitous in the euphotic zone especially in regions dominated by phytoplankton. The ... -
Basin scale distribution of Trichodesmium spp. in the Arabian Sea using Oceansat I/ OCM
(Society of Photo-Optical Instrumentation Engineers, 2006)Trichodesmium spp. is widely spread in the Arabian Sea. It form dense patches. During 2000-2005 (5 years period) extensive sampling was done in the Arabian Sea covering large area and different months starting from November ... -
Seasonality in sub-surface chlorophyll maxima in the Arabian Sea: Detection by IRS-P4/OCM and implication of it to primary productivity
(Society of Photo-Optical Instrumentation Engineers, 2006)Arabian Sea is highly influenced by monsoon systems like SW monsoon (June – September) and NE monsoon (December-February). This affects distribution pattern of phytoplankton, availability of nutrients and changing temperature ... -
Satellite and ship studies of phytoplankton in the Northeastern Arabian during 2000 – 2006 period
(Society of Photo-Optical Instrumentation Engineers, 2006)Sequence of the images from IRS P4 / OCM satellite and extensive shipboard sampling programme are used to understand the seasonal variation of phytoplankton abundance and types in the Northeastern (NE) Arabian Sea and ... -
Remote sensing of sea state through a Polaroid
(Society of Photo-Optical Instrumentation Engineers, 2006)The visible light reflected from a wind-roughened sea surface contains information about the sea state in the form of its polarisation status. Each sea state is characterised by a specific wave-slope distribution depending ... -
Wave modelling for the North Indian Ocean using MSMR analysed winds
(Taylor & Francis, 2006)NCMRWF (National Centre for Medium Range Weather Forecast) winds assimilated with MSMR (Multi-channel Scanning Microwave Radiometer) winds are used as input to MIKE21 Offshore Spectral Wave model (OSW) which takes into ... -
PS-wave moveout inversion for tilted TI media: A physical modeling study
(Society of Exploration Geophysicists, 2006)Mode-converted PS-waves can provide critically important information for velocity analysis in transversely isotropic (TI) media. With physical-modeling data is demonstrated that the combination of long-spread reflection ... -
Modeling and inversion of PS-wave moveout asymmetry for tilted TI media: Part 2: Dipping TTI layer
(Society of Exploration Geophysicists, 2006)Dipping transversely isotropic layers with a tilted symmetry axis (TTI media) cause serious imaging problems in fold-and-thrust belts and near salt domes. The modified PP + PS = SS method introduced in Part 1 is applied ... -
Modeling and inversion of PS-wave moveout asymmetry for tilted TI media: Part 1 - Horizontal TTI layer
(Society of Exploration Geophysicists, 2006)One of the distinctive features of mode-converted waves is their asymmetric moveout (i.e., the PS-wave traveltime in general is different if the source and receiver are interchanged) caused by lateral heterogeneity or ... -
Velocity-independent layer stripping of PP and PS reflection traveltimes
(Society of Exploration Geophysicists, 2006)Building accurate interval velocity models is critically important for seismic imaging and AVO (amplitude variation with offset) analysis. Here, we adapt the PP + PS = SS method to develop an exact technique for constructing ... -
Aerobic degradation of highly chlorinated polychlorobiphenyls by a marine bacterium, Pseudomonas CH07
(Springer, 2006)Hitherto, aerobic degradation of polychlorinated biphenyls (PCBs) has been reported to be limited to the less chlorinated biphenyls. A marine mercury-resistant bacterium, Pseudomonas CH07 (NRRL B-30604) which was capable ... -
Characterization of marine bacteria highly resistant to mercury exhibiting multiple resistances to toxic chemicals
(Elsevier, 2007)Several strains of bacteria unusually highly resistant to mercury were isolated from seawater and marine sediment samples and identified by 16S rDNA sequencing and were also characterized by a battery of biochemical and ... -
Biochemical markers of oxidative stress in Perna viridis exposed to mercury and temperature
(Elsevier, 2007)Oxidative damage and antioxidant properties have been studied in Perna viridis subjected to short-term exposure to Hg along with temperature (72 h) and long-term temperature exposures (14 days) as pollution biomarkers. The ... -
Arcellaceans and pollen/spores of a late Harappan settlement near Porbandar, west coast of India: Implications for palaeoecology and environmental monitoring
(Indian Academy of Sciences, 2007)Archaeological sites have been a storehouse of information on various aspects of the past, including climatic conditions and hydrological characteristics in a particular time bracket. Recent excavation near Porbandar has ... -
Port Blair declaration pledged to establish and develop Andaman and Nicobar Ocean Biogeographic Information System - Meeting report
(Indian Academy of Sciences, 2007) -
Physical modeling and analysis of P-wave attenuation anisotropy in transversely isotropic media
(Society of Exploration Geophysicists, 2007)Anisotropic attenuation can provide sensitive attributes for fracture detection and lithology discrimination. This paper analyzes measurements of the P-wave attenuation coefficient in a transversely isotropic sample made ... -
Air-Sea Coupling Over The Equatorial Indian Ocean
(2007)The present work aims at understanding the upper ocean variability of the EIO on a seasonal scale and then to explore the atmospheric forcing responsible for it.To achieve the objective, the Equatorial Indian Ocean between ... -
A review on fungal diseases of algae, marine fishes, shrimps and corals
(NISCAIR, CSIR, 2006)It is a well-known fact that diseases affect health, survival and recruitment of any individual susceptible for diseases. As a consequence of disease, harvests from natural resources and, in particular, those from aquaculture ... -
Removal of polycyclic aromatic hydrocarbons from aqueous media by the marine fungus NIOCC 312: Involvement of lignin-degrading enzymes and exopolysaccharides
(NISCAIR, CSIR, 2006)The removal of polycyclic aromatic hydrocarbons from aqueous culture medium by the lignin-degrading marine fungus NIOCC 312, obtained from decaying seagrass from a coral reef lagoon is reported here. The percentage of ... -
Effect of nutrient nitrogen on laccase production, its isozyme pattern and effluent decolorization by the fungus NIOCC No. 2a, isolated from mangrove wood
(NISCAIR, CSIR, 2006)Carbon and nitrogen sources in the growth medium play an important role in the production of lignin-degrading enzymes in the white-rot basidiomyceteous fungi. The role of nutrient nitrogen sources in growth media on ...