NOPR Collection:

An updated inventory of new records of coastal macrofauna along Goa, west coast of India

2013-11-01T00:00:00Z

Title: An updated inventory of new records of coastal macrofauna along Goa, west coast of India Authors: Hegde, Mahabaleshwar R; Padate, Vinay P; Velip, Dinesh T; Rivonker, Chandrashekher U Abstract: An assessment of demersal macrofauna for 7 years (2005-2011) through continuous survey (250 trawls, 4 beach seines) with total effort of 424 hours along the bay estuarine and nearshore waters of Goa, yielded 84 new records for the region. Among these, Charybdis (Charybdis) goaensis was new to science. In addition, two species (Thysanophrys armata and Callionymus sublaevis) were found to be first records for the Indian waters, seven were new to the West coast of India and 74 others were new reports for this region. Page(s): 898-902

Screening and partial purification of antifungal metabolite from Streptomyces rochei MSA14: an isolate from marine mining soil of Southwest coast of India.

2013-11-01T00:00:00Z

Title: Screening and partial purification of antifungal metabolite from Streptomyces rochei MSA14: an isolate from marine mining soil of Southwest coast of India. Authors: Prakash, S.; Ramasubburayan, R.; Iyapparaj, P.; Kumar, C.; Mary, C. Jinitha Abstract: A total of fourteen actinobacterial strains were isolated from the mining sediment of Manavalakurichi, Southeast coast of India. Primary screening results through agar well diffusion method revealed that 28.57% actinobacterial strains had in vitro antifungal activity. Most potent actinobacterial isolate MSA14 showed strongest inhibitory activity and was identified as Streptomyces rochei through morphological, physiological, biochemical and 16S rRNA gene sequence characteristics. Crude ethyl acetate extract of S. rochei exhibited wide spectrum antifungal activity which was ranged between 12 and 17 mm. Further evaluation of Minimum inhibitory concentration (MIC) and Minimum fungicidal concentration (MFC) showed the values ranged from 50 to 200 and 100 to 200 µg/ml, respectively. Partial purification of crude extract through TLC using various gradient solvent system recorded different spots of active principles with the respective Rf values between 0.22 and 0.90. TLC autobiography assay evidenced that, spot with the Rf value of 0.54 had promising antagonistic activity. Page(s): 888-897

Recent benthic foraminifera from off the coast of Arkattuthurai (near Nagapattinam), south east coast of India

2013-11-01T00:00:00Z

Title: Recent benthic foraminifera from off the coast of Arkattuthurai (near Nagapattinam), south east coast of India Authors: Elakkiya, P.; Manivannan, V. Abstract: Sediment samples were collected from 12 stations ranging in depth from <1 m to 6m for the study of foraminiferal fauna. In the present study, 41 foraminiferal species belonging to 22 genera have been identified. It consists 4 arenaceous agglutinated, 16 calcareous porcelaneous and the rest 21 calcareous perforate. Shore station is poorly populated while intermediate stations of the traverse (station 6 and 7) have a large population. Among the 41 foraminiferal species, the following species viz., Ammonia beccarii, A. dentata, A. tepida, Asterorotalia inflata, Elphidium crispum, Osangularia venusta, and Quinqueloculina seminulum are found to be widespread and abundantly occurring. Sedimentological parameters such as CaCO₃, organic matter determined from all these samples ranging from 11.26 – 12.22%, 0.67 - 0.90%, respectively. Out of the possible 12 sediment types (Trefethen, 1950) only three namely, sand, silty sand and clay sand are represented in this area. Among these three sediment types the most accommodative substrate for foraminiferal species has been found to be clay sand in the present area. Main ecological parameters which govern the distribution of foraminifera are organic matter content, calcium carbonate content and nature of the substrate. Page(s): 877-887

New trends of transmission capacity evaluation of submarine fiber cable systems with different ultra high multiplexing, amplification and propagation techniques

2013-11-01T00:00:00Z

Title: New trends of transmission capacity evaluation of submarine fiber cable systems with different ultra high multiplexing, amplification and propagation techniques Authors: Mohammed, Abd-El-Naser A.; Metawe’e, Mohamed A.; Rashed, Ahmed Nabih Zaki Abstract: Present study consists new trends of the performance evaluation of submarine fiber cable system with different ultra high multiplexing and propagation techniques over wide range of the affecting parameters. Ultimate optical transmission of 10000 channels huge submarine cables under different depth conditions were considered in this study. Two amplification techniques are considered (the engagement of Raman and Erbium-doped fiber amplifiers). Double impact of both temperature and pressure is investigated through the defined depth penalty. Three transmission times division multiplexing techniques are studied namely soliton; nonlinear and maximum time division multiplexing. Two multiplexing methods are considered in the design of ultra-wide wavelength division multiplexing (UW-WDM) (10000 optical channels) and ultra-wide space division multiplexing UW-SDM (400 fiber links). Based on experimental data, both the deep ocean water temperature and pressure are tailored as functions of water depth. Product of the transmitted bit rate and the repeater spacing is processed over wide ranges of the affecting parameters, where both the repeater spacing and the transmitted soliton bit rate are in positive correlations with the total number of links. Page(s): 868-876