DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 5031-5050 of 9376
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Monsoon induced cobalt enrichment in Porites (coral) from the Arabian Sea
(NISCAIR, CSIR, 1998)Cobalt concentrations in growth bands of a reef building coral (Porites sp.) collected from Kalpeni Atoll of the Lakshadweep group of islands (Arabian Sea), rvealed that cobalt concentrations and Co/Ca ratios exhibit similar ... -
Nitrogen isotopic studies in the suboxic Arabian Sea
(Indian Academy of Sciences, Bangalore, India, 1998)Measurements of sup(15)N/ sup(14)N in dissolved molecular nitrogen (N sub(2)), nitrate (NO sub(3) sup(-)) and nitrous oxide (N sub(2)O) and sup(18)O/ sup(16)O in N sub(2)O [expressed as delta sup(15)N and delta sup(18)O, ... -
Identity of saropeptate, aurantiamide acetate and asperglaucide
(Oriental Scientific Publishing Company, Bhopal, 1998)Identity of the dipeptides, saropeptate, aurantiamide acetate and asperglaucide has been established on the basis of published data -
Lipid constituents of the red alga Acantophora spicifera
(Pergamon, 1998)A new steroid cholest-4-ene-3 alpha, 6 beta-diol together with the known cholest-4-ene-3-one, lauric acid and O-phathalic acid bis-(2-ethyl nonly)-ester were isolated from the red alga Acantophora spicifera. The structures ... -
Biogeochemical significance of transport exopolymer particles in the Indian Ocean
(American Geophysical Union, 1998)The behaviour of Transparent Exopolymer Particles (TEP), produced by biochemical processes, was studied for the North Indian Ocean, an area of global biogeochemical significance, during 1996 southwest monsoon. Very different ... -
Isotopic composition of nitrate in the central Arabian Sea and eastern tropical North Pacific: A tracer for mixing and nitrogen cycles
(American Society of Limnology and Oceanography, 1998)The delta sup(15)N composition of nitrate and N sub(2) gas was measured in the eastern tropical North Pacific (ETNP) and central Arabian Sea (AS) suboxic regions. The delta sup(15)N of nitrate increased from 6 ppt at 2,500 ... -
Particulate trace metals in Cochin backwaters: Distribution of seasonal indices
(ICAR, 1998)A seasonal analysis of particulate trace metals, viz. iron, manganese, zinc, copper, cobalt and nickel collected from 4 stations in Cochin backwaters are presented. The spatial trend for cobalt, iron and nickel was stationary ... -
Budgetary and biogeochemical implications of N sub(2)O isotope signatures in the Arabian Sea
(Macmillan, 1998)Nitrous oxide (N sub(2)O) is an important greenhouse gas that also plays a role in the chemistry of stratospheric ozone depletion, but its atmospheric budget has yet to be well-quantified sup(1-5). However, multi-isotope ... -
Residual fluxes of water, salt and suspended sediment in the Beypore Estuary
(NISCAIR, CSIR, 1998)The monthly trends of the residual fluxes of salt and water and the transportation of suspended sediments in the Beypore estuarine system, Kerala, India were examined. At the river mouth the water flux was directed seaward ... -
Abundance of dissolved polysaccharides in the oxygen minimum layer of the northern Indian Ocean
(Elsevier, 1998)Water samples collected from the upper 1500 m at seven stations in the Bay of Bengal and at five stations in the Arabian Sea, were analysed for dissolved carbohydrate by the MBTH (3-methyl-2-benzothiazolenone hydrazone ... -
Seasonal variability in distribution and fluxes of methane in the Arabian Sea
(American Geophysical Union, 1998)Methane, a biogeochemically important gas in Earth's atmosphere was measured in the water column and air in the Arabian Sea in different seasons, viz., northeast monsoon, intermonsoon, and southwest monsoon, as part of the ... -
Changes in water quality at Cochin harbour dredging site, south west coast of India
(NISCAIR, CSIR, 1998)The water quality in the vicinity of the dredging did not show any appreciable change. All dissolved nutrients recorded sharp changes in the water column. After 20 minutes and 2 hours, the conditions at the dredging were ... -
Hydrochemical studies along the coastal waters off Mangalore
(Environmedia, 1998)Environmental parameters such as temperature, salinity, dissolved oxygen, BOD pH, nutrients suspended load and chlorophyll 'a' were estimated in the coastal waters of Mangalore. Four transects, each consisting of four ... -
The central and eastern Arabian Sea as a perennial source of atmospheric carbon dioxide
(Blackwell, 1998)Seasonal (winter monsoon, intermonsoon and southwest monsoon) and interannual (between southwest monsoon seasons of 1995 and 1996) variations in total carbon dioxide (TCO sub(2)) and partial pressure of CO sub(2) (pCO ... -
Influence of bacterial exopolymers, conspecific adult extract and salinity on the cyprid metamorphosis of Balanus amphitrite (Cirripedia: Thoracica)
(Blackwell, 1998)The influence of bacterial exopolymers and conspecific adult extract of Balanus amphitrite on metamorphosis of cyprid larvae at different salinities has been evaluated through laboratory assay. The bacterial exopolymers ... -
Biological characteristics of the Vashishti Estuary, Maharashtra (west coast of India)
(NISCAIR, CSIR, 1998)The estuary and coastal nearshore regions sustained fairly high concentration of chlorophyll a (av. 3.1 mg/m sup(3)) and primary productivity (av. 89.9 mgC/m sup(3)/h). High rate of primary productivity wos observed in the ... -
Biological investigations of Indian phaeophyceae: 17. Seasonal variation of antibacterial activity of total sterols obtained from frozen samples of Sargassum johnstonii Setchell et Gardner
(Seaweed Research and Utilization Association, 1998)From lipid fraction of frozen samples of Sargassum johnstonii unsaponifiable part was extracted with diethyl ether to isolate total sterols. The extracted sterols were obtained for a period of nine months and tested against ... -
Descriptions of Indoerythrops typicus gen. nov., sp. nov. and Pleureythrops inscita new record from Indian waters (Crustacea: Mysidacea)
(Cambridge University Press, 1998)Descriptions of Indoerythrops typicus, new genus and new species, and Pleurerythrops inscita, new record, from Indian waters are given. The new genus is distinguishable from the allied genera of the tribe Erythropini in ... -
Geographical variation in the distribution of different calanid species in the Indian Ocean
(Intergovernmental Oceanographic Commission, 1998)The species composition of Calanidae in the Indian Ocean was studied from zooplankton collections taken between 24 degrees N to 40 degrees S and 20 degrees E to 120 degrees E. Nannocalanus minor was widespread with high ...