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    <title>DRS Community: Institute's contributions</title>
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      <title>The Community's search engine</title>
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      <title>n-Alkanes in surficial sediments of Visakhapatnam harbour, east coast of India</title>
      <link>http://drs.nio.org/drs/handle/2264/4292</link>
      <description>Title: n-Alkanes in surficial sediments of Visakhapatnam harbour, east coast of India
&lt;br/&gt;
&lt;br/&gt;Authors: Punyu, V.R.; Harji, R.R.; Bhosle, N.B.; Sawant, S.S.; Venkat, K.
&lt;br/&gt;
&lt;br/&gt;Abstract: Surface sediments collected from 19 stations along Visakhapatnam harbour were analysed for organic carbon (OC), delta sup(13)C sub(oc), total lipids (TL), total hydrocarbon (THC), n-alkane concentration and composition. OC, delta sup(13)C sub(oc), TL and THC ranged from 0.6 percent to 7.6 percent, -29.3 to -23.8 ppt, 300 to 14,948 mu g g sup(-1) dw, and 0.2 to 2,277 mu g g sup(-1) dw, respectively. Predominance of even carbon numbers n-alkanes C12–C21 with carbon preference index (CPI) of less than 1 suggests major microbial influence. Fair abundance of odd carbon number n-alkanes in the range of C sub(15)–C sub(22) and C sub(23)–C sub(33) indicates some input from phytoplankton and terrestrial sources, respectively. Petrogenic input was evident from the presence of hopanes and steranes. The data suggest that organic matter (OM) sources varied spatially and were mostly derived from mixed source.</description>
      <pubDate>Mon, 29 Oct 2012 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>Fungal diversity from various marine habitats deduced through culture-independent studies</title>
      <link>http://drs.nio.org/drs/handle/2264/4291</link>
      <description>Title: Fungal diversity from various marine habitats deduced through culture-independent studies
&lt;br/&gt;
&lt;br/&gt;Authors: Jebaraj, C.M.; Raghukumar, C.
&lt;br/&gt;
&lt;br/&gt;Abstract: Studies on the molecular diversity of the micro-eukaryotic community have shown that fungi occupy a central position in a large number of marine habitats. Environmental surveys using molecular tools have shown the presence of fungi from a large number of marine habitats such as deep-sea habitats, pelagic waters, coastal regions, hydrothermal vent ecosystem, anoxic habitats, and icecold regions. This is of interest to a variety of research disciplines like ecology, evolution, biogeochemistry, and biotechnology. This review summarizes how molecular tools have helped to broaden understanding of the fungal diversity in various marine habitats. Majority of the environmental phylotypes could be grouped as novel clades within Ascomycota, Basidiomycota, and Chytridiomycota or as basal fungal lineages. Deep-branching novel environmental clusters could be grouped within Ascomycota as the Pezizomycotina clone group, deep-sea fungal group-I, and soil clone group-I, within Basidiomycota as the hydrothermal and/or anaerobic fungal group, and within Chytridiomycota as Cryptomycota or the Rozella clade. However, a basal true marine environmental cluster is still to be identified as most of the clusters include representatives from terrestrial regions. The challenge for future research is to explore the true marine fungi using molecular techniques.</description>
      <pubDate>Mon, 29 Oct 2012 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>Tetraselmis indica (Chlorodendrophyceae, Chlorophyta), a new species isolated from salt pans in Goa, India</title>
      <link>http://drs.nio.org/drs/handle/2264/4290</link>
      <description>Title: Tetraselmis indica (Chlorodendrophyceae, Chlorophyta), a new species isolated from salt pans in Goa, India
&lt;br/&gt;
&lt;br/&gt;Authors: Mani, A.; Anil, A.C.; Leliaert, F.; Delany, J.; Mesbahi, E.
&lt;br/&gt;
&lt;br/&gt;Abstract: A new species of Tetraselmis, T. indica Arora &amp; Anil, was isolated from nanoplankton collected from salt pans in Goa (India) and is described based on morphological, ultrastructural, 18S rRNA gene sequence and genome size data. The species is characterized by a distinct eyespot, rectangular nucleus, a large number of Golgi bodies, two types of flagellar pit hairs and a characteristic type of cell division. In nature, the species was found in a wide range of temperatures (48 degrees C down to 28 degrees C) and salinities, from hypersaline (up to 350 psu) down to marine (c. 35 psu) conditions. Phylogenetic analysis based on 18S rDNA sequence data showed that T. indica is most closely related to unidentified Tetraselmis strains from a salt lake in North America.</description>
      <pubDate>Mon, 29 Oct 2012 22:58:59 GMT</pubDate>
    </item>
    <item>
      <title>Yanai waves in the western equatorial Indian Ocean</title>
      <link>http://drs.nio.org/drs/handle/2264/4289</link>
      <description>Title: Yanai waves in the western equatorial Indian Ocean
&lt;br/&gt;
&lt;br/&gt;Authors: Chatterjee, A.; Shankar,  D.; McCreary, J.P.; Vinayachandran, P.N.
&lt;br/&gt;
&lt;br/&gt;Abstract: Observations and models have shown the presence of intraseasonal fluctuations in 20-30-day and 10-20-day bands in the equatorial Indian Ocean west of 60 degrees E (WEIO). Their spatial and temporal structures characterize them as Yanai waves, which we label low-frequency (LFYW) and high-frequency (HFYW) Yanai waves, respectively. We explore the dynamics of these intraseasonal signals, using an ocean general circulation model (Modular Ocean Model) and a linear, continuously stratified model. Yanai waves are forced by the meridional wind tau sup(y) everywhere in the WEIO most strongly during the monsoon seasons. They are forced both directly in the interior ocean and by reflection of the interior response from the western boundary; interference between the interior and boundary responses results in a complex surface pattern that propagates eastward and has nodes. Yanai waves are also forced by instabilities primarily during June/July in a region offshore from the western boundary (52-55 degrees E). At that time, eddies, generated by barotropic instability of the Southern Gyre, are advected southward to the equator. There, they generate a westward-propagating, cross-equatorial flow field, v sub(eq), with a wave number/frequency spectrum that fits the dispersion relation of a number of Yanai waves, and these waves are efficiently excited. Typically, Yanai waves associated with several baroclinic modes are excited by both wind and eddy forcing; and typically, they superpose to create beams that carry energy vertically and eastward along ray paths. The same processes generate LFYWs and HFYWs, and hence, their responses are similar; differences are traceable to the property that HFYWs have longer wavelengths than LFYWs for each baroclinic mode.</description>
      <pubDate>Mon, 29 Oct 2012 22:58:59 GMT</pubDate>
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