Now showing items 21-40 of 58

    • Chemical diversity in opisthobranch molluscs from scarcely investigated Indo-Pacific areas 

      Wahidullah, S.; Guo, Y.-W.; Fakhr, I.M.I.; Mollo, E. (Springer-Verlag, 2006)
      Opisthobranch molluscs with both a rich variety of secondary metabolites and great biomedical potential represent the most intensively studied group of molluscs in natural product chemistry. The chemical investigations ...
    • Chemical examination of the brown alga Stoechospermum marginatum (C. Agardh) 

      Wahidullah, S.; DeSouza, L.; Kamat, S.Y. (Current Science Association, 1988)
      The crude methalonic extract of marine algae Stoechospermum marginatum from west coast of India was found to have spasmolytic activity. Search for the pharmacologically active compounds led to the isolation of steroids, ...
    • Chemical examination of the Red alga Acanthophora spicifera 

      Wahidullah, S.; Kamat, S.Y. (Oxford and IBH, New Delhi, 1991)
      Analyses of petroleum ether and chloroform extracts of the marine alga Acanthophora spicifera exhibiting antifertility activity led to the isolation of sterols and fatty acids as well as the rare dipeptides aurantiamides. ...
    • Chemotaxonomic study of the demosponge Cinachyrella cavernosa (Lamarck) 

      Wahidullah, S.; Naik, B.G.; Al-Fadhli, A.A. (Elsevier, 2015)
      Sterols as acetates and phthalate esters were identified by GC–MS in demosponge Cinachyrella cavernosa. The sponge contained mainly C27, C28 and C29 Δ5 conventional sterols and minor amounts of C27 and C28 Δ0 analogues. ...
    • Constituents of Chondria armata 

      Govenkar, M.B.; Wahidullah, S. (Pergamon, 2000)
      A novel long chain fatty ester, pentyl hentriacontanoate 1 and an orange red pigment, caulerpin 2 have been isolated and characterised from a red alga Chondria armata. The pigment caulerpin hitherto known to be a constituent ...
    • Detection of DNA damage in fish Oreochromis mossambicus induced by co-exposure to phenanthrene and nitrite by ESI-MS/MS 

      Wahidullah, S.; Rajamanickam, Y.R. (Springer-Verlag, 2010)
      Mutagenic nitrated polycyclic aromatic hydrocarbons (nitro-PAHs) have been known to arise in the environment through direct emissions from combustion sources and nitration of PAHs, primarily in the atmosphere. In the marine ...
    • Dipeptides from the red alga Acanthopora spicifera 

      Wahidullah, S.; DeSouza, L.; Kamat, S.Y. (Pergamon, 1991)
      An investigation of red alga Acanthophora spicifera afforded the known peptide, aurantiamide acetate and a new diastereoisomer of this dipeptide (dia-aurantiamide acetate). This is a first report of aurantiamide acetate ...
    • Duff reaction on phenols: Characterization of non steam volatile products 

      Wahidullah, S.; DeSouza, L.; Bhattacharya, J. (Oriental Scientific Publishing Company, Bhopal, 1997)
      New products having structures 1 and 2 have been characterized in the Duff reaction thymol arid carvacrol. These products have been identified as 2.6'-dithymylmethane 1 and 5.5' -dicarvacryl methane 2 respectively on the ...
    • Fermentation products of solvent tolerant marine bacterium Moraxella spp. MB1 and its biotechnological applications in salicylic acid bioconversion 

      Wahidullah, S.; Naik, D.N.; PrabhaDevi (Public Library of Science, 2013)
      As part of a proactive approach to environmental protection, emerging issues with potential impact on the environment is the subject of ongoing investigation. One emerging area of environmental research concerns pharmaceuticals ...
    • Formation of genotoxic nitroPAH compounds in fish exposed to ambient nitrite and PAH 

      Shailaja, M.S.; Rajamanickam, R.; Wahidullah, S. (Oxford University Press, 2006)
      Mutagenic nitrated polycyclic aromatic hydrocarbons (nitroPAHs) have been known to arise in the environment through direct emissions from combustion sources and nitration of PAHs, primarily in the atmosphere. Here we report ...
    • Free Sterols of the red alga Chondria armata (Kutz.) Okamura 

      Govenkar, M.B.; Wahidullah, S. (Walter de Gruyter, Berlin, 2000)
      The free sterols of the red alga, Chondria armata have been identified by means of NMR, EIMS and GCMS analyses. The mixture contained besides cholesterol, C sub(28) and C sub(29) saturated as well as unsaturated components. ...
    • Fungicidal compounds from a marine Ascidian-associated fungus Trichoderma harzianum 

      PrabhaDevi; Ciavatta, M.L.; Wahidullah, S.; Vuppala, S.; DeSouza, L. (Discovery Publication, 2013)
      A marine Ascidian-associated fungus, Trichoderma harzianum, (NIO/BCC2000-51) was assessed for its in vitro antagonistic activity against ten fungal phytopathogens and three food-infesting fungi. Fractionation of the cell-free ...
    • Glycolipids from the red alga Chondria armata (Kutz.) Okamura 

      Al-Fadhli, A.; Wahidullah, S.; DeSouza, L. (Oxford University Press, 2006)
      Three distinct fractions containing polar glycolipids (PF1–3) were isolated from the chloroform soluble fraction of crude methanolic extract of red alga Chondria armata (Kütz.) Okamura on gel chromatography over Sephadex ...
    • Identity of saropeptate, aurantiamide acetate and asperglaucide 

      Wahidullah, S.; DeSouza, L. (Oriental Scientific Publishing Company, Bhopal, 1998)
      Identity of the dipeptides, saropeptate, aurantiamide acetate and asperglaucide has been established on the basis of published data
    • Increased formation of carcinogenic PAH metabolites in fish promoted by nitrite 

      Shailaja, M.S.; Rajamanickam, R.; Wahidullah, S. (Elsevier, 2006)
      Nitrite (NO2−), a highly reactive chemical species, accumulates in coastal waters as a result of pollution with nitrogenous waste and/or an imbalance in the bacterial processes of nitrification and denitrification. The ...
    • Larvicidal activity of some marine macrophytes against Artemia salina 

      PrabhaDevi; Wahidullah, S.; DeSouza, L.; Kamat, S.Y. (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 ...
    • Leishmanicidal activity of 2-benzoxazolinone from Acanthus illicifolius in vitro 

      Kapil, A.; Sharma, S.; Wahidullah, S. (Thieme Medical Publishers, 1994)
    • Lipid constituents of marine sponge Suberites carnosus 

      Mishra, P.D.; Wahidullah, S.; DeSouza, L.; Kamat, S.Y. (NISCAIR, CSIR, 1996)
      Sterols (22E) - 24- methyl-cholest - 4, 8(9), 22(23) - triene - 3, 7 - diol (1) and (22E)-24-methyl-ergost-6, 22(23)-diene-5, 8-epidioxy-3-ol (2), a fatty acid nonadecanoic acid and a fatty ester methyl nonadecanoate have ...
    • Lipid constituents of the red alga Acantophora spicifera 

      Wahidullah, S.; DeSouza, L.; Govenkar, M.B. (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 ...
    • Marine prostanoids - a review 

      Wahidullah, S.; DeSouza, L. (Indian Association for Limnology and Oceanography, 1991)
      The occurrence and structure of prostaglandins including clavulones, punaglandins and claviridenones in marine organisms is reviewEd. by comparison of the spectral data reported the identity of 20-acetoxy claviridenones b ...