Now showing items 1-18 of 18

    • A predictive regression model for the geochemical variability of iron and manganese in a coral reef ecosystem 

      Gopinath, A.; Kumar, N.C.; Jayalakshmy, K.V.; Padmalal, D.; Nair, S.M. (Taylor and Francis, 2005)
      This article focuses on the influence of nutrient forms (nitrogen/phosphorous forms) and parameters like pH and organic carbon in the distributional characteristics of two important trace metals, viz. iron and manganese, ...
    • Arsenic enrichment in estuarine sediments-impact of iron and manganese mining 

      Nair, M.; Joseph, T.; Balachandran, K.K.; Nair, K.K.C.; Paimpillii, J.S. (BUET, Bangladesh, 2003)
      River Mandovi and Zuari, Goa (west coast of India) are flowing through iron and manganese mining areas and are heavily used for iron and manganese ore transport. This region generates 25-30 million tons of mining rejects ...
    • Atypical ferromanganese micronodules from middle fan-valley system, Bay of Bengal 

      Chauhan, O.S.; Gujar, A.R.; Rao, Ch.M. (Current Science Association, 1994)
      Ferromanganese micronodules having botryoidal and spheroidal morphogroups have been observed over a 0.22 million km@u2@@ area from the middle fan region of the Bay of Bengal. The bulk micronodules have 26.26% Mn, 1.02% Fe, ...
    • Bacterial contribution to mitigation of iron and manganese in mangrove sediments 

      Krishnan, K.P.; Fernandes, S.O.; Chandan, G.S.; LokaBharathi, P.A. (Elsevier, 2007)
      The Mandovi and Chapora, (Goa, India) are two tropical estuaries lying in close geographic proximity on the west coast of India. Seasonal changes in down core variation of Fe, Mn and Total Organic Carbon (TOC) in the ...
    • Buried nodules from the central Indian Ocean basin 

      Pattan, J.N.; Parthiban, G. (Regional Research laboratory, Bhubaneswar, 2005)
      The occurrence of buried nodules is rare compared to surface nodule abundance in the deep sea. Surface nodules are collected with freefall grab, vanveen /peterson grabs, dredges and sediment cores whereas buried nodules ...
    • Deposition of Mn-Cu-Ni-enriched sediments during glacial period in the Central Indian Basin 

      Borole, D.V. (Current Science Association, Bangalore, India, 1993)
      Two siliceous sediment cores collected from the Central Indian Basin have been analysed for organic carbon, biogenic silica, Al, Mn, Ni and Cu content. The concentrations of Mn, Cu and Ni showed one order of magnitude ...
    • Distribution of iron, manganese, cobalt and nickel in sediment cores of the northeastern Arabian Sea 

      Rao, Ch.M.; Setty, M.G.A.P. (Geological Society of India, 1976)
      A study of the distribution of iron, manganese, cobalt and nickel in sediment cores from the shelf, slope and basin regions of Bombay-Kathiawar coast of India shows that cobalt and nickel are derived from the overlying sea ...
    • Ferromanganese micronodules from Bengal Fan 

      Chauhan, O.S.; Gujar, A.R.; Rao, Ch.M. (Museo Geologico di Bologna, 1993)
      The occurrence of ferromanganese micronodules, hitherto unreported from any fan-valley system of the world, has been recorded from over 0.22 million km sup(2) area located in the middle fan region of the Bay of Bengal. ...
    • Ferromanganese oxides on sharks' teeth from Central Indian Ocean Basin 

      Iyer, S.D. (Council of Scientific and Industrial Research, New Delhi, 1999)
      The mineralogy, composition and growth rates of ferromanganese (Fe-Mn) oxides over the sharks' teeth from the Central Indian Ocean Basin are presented. The trends of metal enrichment (Mn, Ni, Cu and Zn) and depletion (Fe ...
    • Geochemistry of deep-sea sediment cores from the Central Indian Ocean Basin 

      Mudholkar, A.V.; Pattan, J.N.; Parthiban, G. (NISCAIR, New Delhi, 1993)
      Four sediment cores from the Central Indian Ocean Basin (CIOB) were studied to characterise the coarse fraction (less than 63 mu), transition metal and major oxide contents. Transition metals (Mn, Cu, Ni, Zn) show enrichment ...
    • Heavy metals in fishes from coastal waters of Cochin, southwest coast of India 

      Nair, M.; Balachandran, K.K.; Sankaranarayanan, V.N.; Joseph, T. (NISCAIR, CSIR, 1997)
      The concentration levels of copper, zinc, manganese and iron have been determined in marine fishes from Cochin area which is one of the major fishing zones along the west coast of India. The concentration of heavy metals ...
    • Manganese in the shelf sediments off the west coast of India 

      Murty, P.S.N.; Rao, Ch.M.; Reddy, C.V.G. (Current Science Association, 1968)
      The distribution pattern of manganese in the marine sediments of the west coast of India was studied in relation to the source and environmental factors. The progressive decrease in the manganese content of the sediments ...
    • Manganese Oxidation by Bacteria: Biogeochemical Aspects 

      Sujith, P.P.; LokaBharathi, P.A. (Springer-Verlag, 2011)
      Manganese is an essential trace metal that is not as readily oxidizable like iron. Several bacterial groups posses the ability to oxidize Mn effectively competing with chemical oxidation. The oxides of Mn are the strongest ...
    • Metal concentration in some seaweeds of Goa (India) 

      Agadi, V.V.; Bhosle, N.B.; Untawale, A.G. (Walter de Gruyter, Berlin, 1978)
      Seventeen species of marine algae collected from five localities of Goa, were analysed for Co, Cu, Fe, Mn, Ni, Pb and Zn, using atomic absorption spectrophotometer. All the seven metals showed considerable variations in ...
    • Mobilization of manganese by basalt associated Mn(II)-oxidizing bacteria from the Indian Ridge System 

      Sujith, P.P.; Mourya, B.S.; Krishnamurthi, S.; Meena, R.M.; LokaBharathi, P.A. (Elsevier, 2014)
      The Indian Ridge System basalt bearing Mn-oxide coatings had todorokite as the major and birnesite as the minor mineral. We posit that microorganisms associated with these basalts participate in the oxidation of Mn and ...
    • Seasonal and spatial variations in settling manganese fluxes in the northern Arabian Sea 

      Nair, T.M.B.; Ramaswamy, V.; Shankar, R.; Ittekkot, V. (Pergamon, 1999)
      Particulate manganese (Mn) fluxes measured with six time series sediment traps showed that the annual settling fluxes were 3-6 times higher in the west compared to those in the east and central Arabian Sea. Annual detrital ...
    • Speciation of iron and manganese in the sediments of Mandovi Estuary 

      Jayakumar, D.A.; Rajendran, A. (CAS in Marine Biology, Parangipettai, 1991)
      Several attempts have been made to study the distribution of iron and manganese in Mandovi Estuary, Goa, India. But this is the first report of its kind on the speciation of these metals in sediments from Indian waters. ...
    • Variability of Mn, Fe, Ni, Cu and Co in manganese nodules from the Central Indian Ocean Basin 

      Jauhari, P. (Elsevier, 1989)
      The trace element variations in manganese nodules from the Central Indian Basin have been related to the underlying sediment type. Percentages of Mn, Cu and Ni are high in nodules occurring in siliceous sediments compared ...