DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 5161-5180 of 9513
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Larvicidal activity of some marine macrophytes against Artemia salina
(Society of Biosciences, 1998)Petroleum ether (PE) and chloroform (C) soluble fractions of methanolic extracts of nine different macrophytes viz. mangroves (Derris heptaphyla, Salvadora persica, Sonneratia caseolaris and Clerodendrum inerme), seaweeds ... -
Influence of divalent cations and pH adsorption of a bacterial polysaccharide adhesin
(Elsevier, 1998)Hyphomonas MHS-3 elaborates a diffuse capsular material, primarily composed of polysaccharide, which has been implicated to serve as the holdfast of this prosthecate marine bacterium. A purified polysaccharide (fr2ps) from ... -
CO sub(2) and N sub(2) O fluxes from the northern Indian Ocean
(Narosa, New Delhi (India), 1998)The CO sub(2) and N sub(2)O in the north Indian Ocean were measured and their fluxes were evaluated. Samples were collected from the Arabian Sea and the Bay of Bengal. The water samples were analysed for dissolved oxygen, ... -
Renieramycins H and I, two novel alkaloids from the sponge Haliclona cribricutis Dendy
(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 ... -
Riverine input of chlorinated hydrocarbons in the coastal pollution
(The Pennsylvania Academy of Science, Easton, PA, USA, 1998)This chapter presents an overview of the contamination of the coastal ecosystem of the North Sea, Arabian Sea, Bay of Bengal, East China Sea, Atlantic Sea, Aegean Sea, East Java Sea, Australian coast and the Mediterranean ... -
Studies on the secondary metabolites from the Indian gorgonian Subergorgia suberosa: Isolation and characterization of four analogues of the cardiotoxin subergorgic acid
(American Chemical Society, 1998)Chemical investigation of the methanol extract of the Indian Ocean gorgonian coral Subergorgia suberosa resulted in isolation and identification of four novel compounds 2-5. Structural investigation revealed compound 1 to ... -
A heteroaromatic acid from marine sponge Suberites vestigium
(NISCAIR, CSIR, 1998)The 4-Methyl- pyrazole-3(5)-carboxylic acid has been isolated from the buttanol fraction of marine sponge, Sunerites vestigium for the first time. The methanol extract of the sponge exhibits in vitro antihistaminic activity. ... -
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 ...

