DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 2131-2150 of 9371
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Hydrothermal signature in ferromanganese oxide coatings on pumice from the Central Indian Ocean Basin
(Springer, 2015)Mineralogical and elemental analyses of 20 ferromanganese (FeMn)-coated pumice samples from the Central Indian Ocean Basin (CIOB) indicate that todorokite is the major mineral phase, whereas vernadite occurs only rarely. ... -
Environmental issues of deep-sea mining
(Elsevier, 2015)As terrestrial mineral deposits are either depleting or of low grade, minerals from the deep-sea like the polymetallic nodules, cobalt rich crusts and polymetallicsulfides are considered as alternative sources for metals ... -
Reduction of mercury (II) by humic substances-influence of pH, salinity of aquatic system
(Springer, 2015)This study demonstrates that under abiotic dark conditions in aquatic system, humic substances are not only capable of converting Hg(II) to Hg<sup>0</sup> but also able to bind Hg(II) ion. The degree of Hg(II) reduction ... -
Evolution of productivity and monsoonal dynamics in the eastern Arabian Sea during the past 68 ka using dinoflagellate cyst records
(Elsevier, 2015)For the first time here we report the dinoflagellate cyst assemblage response to the monsoon variability over the last 68 ka from the Eastern Arabian Sea (EAS). Based on the cyst assemblage, five dinoflagellate cyst zones ... -
Genotoxic potency of mercuric chloride in gill cells of marine gastropod Planaxis sulcatus using comet assay
(Springer, 2015)In vivo and in vitro exposures were used to investigate the genotoxicity of mercuric chloride (HgCl<sub>2</sub>) to the marine snail, Planaxis sulcatus. The comet assay protocol was validated on gill cells exposed in vitro ... -
Observed decadal changes in extent of mangroves and coral reefs in southern Gulf of Kachchh using principal component analysis and geo-spatial techniques: A case study
(Springer, 2015)The identification of temporal change in the extent of coral reefs and mangroves patches along the Narara and Kalubhar islands was performed using multi-temporal data from 1999 to 2010 (LISS III and LISS IV (MX)). For ... -
Effect of biofilm on fluorescence measurements derived from fast repetition rate fluorometers
(Taylor and Francis, 2015)This study evaluates, for the first time, the influence of biofilms on single and double optical window (SOW and DOW, respectively) fast repetition rate fluorometer (FRRF) measurements of microalgal photosystem-II initial ... -
Isolation of stigmast-5,24-dien-3-ol from marine brown algae Sargassum tenerrimum and its antipredatory activity
(Royal Society of Chemistry, 2015)In recent years many sterols with potent biological activity have been identified from marine sources. Here we report the isolation of stigmast-5,24-dien-3-ol (fucosterol) as a major metabolite from the bioactive hexane-fraction ... -
Bis(indolyl)methane alkaloids: Isolation, bioactivity, and syntheses
(Georg Thieme Verlag Stuttgart, 2015)Bis(indolyl)methane (BIM) alkaloids are an important group of bioactive natural products predominantly found in marine organisms. Thus, compounds like arsindoline A and B, vibrindole A, arundine, and trisindoline are found ... -
Verification of model wave heights with long-term moored buoy data: Application to wave field over the Indian Ocean
(Elsevier, 2015)This paper describes the results obtained using a modified version (ModWAM) of the global wave model WAM, in which new parameterizations have been applied based on the seasonal changes and extreme weather events that have ... -
Daily variations in pathogenic bacterial populations in a monsoon influenced tropical environment
(Elsevier, 2015)Changing climatic conditions have influenced the monsoon pattern in recent years. Variations in bacterial population in one such tropical environment were observed everyday over two years and point out intra and inter ... -
Performance of ERA-Interim wave data in the nearshore waters around India
(American Meteorological Society, 2015)Bulk wave parameters, such as wave height and wave period, are required for engineering and environmental applications. In this study, measured wave data from six shallow-water locations in the data-sparse north Indian ... -
Plankton food web and its seasonal dynamics in a large monsoonal estuary (Cochin backwaters, India)-significance of mesohaline region
(Springer, 2015)The paper presents the ecology and dynamics of plankton food web in the Cochin backwaters (CBW), the largest monsoonal estuary along the west coast of India. The data source is a time series measurement carried out in the ... -
Effect of wind turbine on TLP flating platform response
(eSAT Publishing House, Bangalore, India, 2015)Ever increasing population of India demands high production of electrical energy which puts immense pressure on our limited stock of non-renewable sources of energy and makes us dependent over imports from foreign countries. ... -
Use of the Boron partition coefficient ‘K<sub>D</sub>’ and B/Ca from planktonic foraminifera in the estimation of past seawater pCO<sub>2</sub>
(Geochemical Society of Japan, 2015)We assess the usefulness of the empirical boron partition coefficient, K<sub>D</sub> and B/Ca measured from planktonic foraminifera in estimation of pCO<sub>2</sub> using three different relationships between K<sub>D</sub> ... -
Impact of river discharge on distribution of dimethyl sulfide (DMS) and its fluxes in the coastal Bay of Bengal
(Elsevier, 2015)A systematic study was conducted to examine the on variations in DMS and DMSP<sub>t</sub> during peak discharge period along the coastal Bay of Bengal. The southern coastal Bay of Bengal (SCB) received a large quantity of ... -
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 ... -
Environmental controls on the speciation and distribution of mercury in surface sediments of a tropical estuary, India
(Elsevier, 2015)Distribution and speciation of mercury (Hg) in the sediments from a tropical estuary (Godavari estuary) was influenced by the changing physico-chemical parameters of the overlying water column. The sediments from the ... -
Influence of river discharge on abundance and dissemination of heterotrophic, indicator and pathogenic bacteria along the east coast of India
(Elsevier, 2015)In order to examine the influence of discharge from different rivers from peninsular India and urban sewage on intensity and dissemination of heterotrophic, indicator and pathogenic bacteria, a study was carried out during ... -
Microbial iron reduction and methane oxidation in subsurface sediments of the Arabian Sea
(Elsevier, 2015)Arabian Sea is one of the most productive regions of the world's ocean with seasonal upwelling and a characteristic oxygen minimum zone. It receives a continuous input of windborne iron-rich dust which possibly stimulates ...