NOPR Collection:

Prevalence and histopathology of branchioblastoma in Sardinella longiceps (Valenciennes 1847) of southeast coast of India

2014-12-01T00:00:00Z

Title: Prevalence and histopathology of branchioblastoma in Sardinella longiceps (Valenciennes 1847) of southeast coast of India Authors: Sinduja, K.; Vijayakumar, R.; Gopalakrishnan, A. Abstract: Branchioblastoma in Sardinella longiceps is described in present study. Large tumour masses were found under the operculum. Tumour is characterized by the multilobed and pale to red in color and located in the brachial chamber of the fish. It varied in consistency from very soft and triable to hard and also vary in size from 17 mm to 33 mm in diameter and 18 to 44 mm in length. Prevalence study revealed that the higher incidence (0.046 %) of branchioblastoma was reported in Cuddalore in pre-monsoon 2011 and lower (0.010 %) in Parangipettai at summer 2010. Histopathologic examinations revealed that the chondroid tissue with basophilic nodules and the fibrovascular stroma were present in the tumour tissue. Presence of dark stained nucleus and also the granular cells were typical in the tumour tissue. This is the first report of branchioblastoma in Indian marine waters. Page(s): 2327-2332

Gastropod diversity in Mudasal Odai and Nagapattinam, southeast coast of India

2014-12-01T00:00:00Z

Title: Gastropod diversity in Mudasal Odai and Nagapattinam, southeast coast of India Authors: Sakthivel, Kollimalai; Fernando, S. Antony Abstract: Gastropods list prepared from Mudasal Odai (Lat.11°29'N; Long. 79°46' E) and Nagapattinam (Lat. 10° 46' N; Long. 79° 59' E) coast of Tamil Nadu, south east India. List consists 75 species, 45 genera and 31 families in Mudasal Odai and 67 species, 42 genera and 29 families in Nagapattinam coast. Among the 31 families 21 are single genera, 7 are two genera and 3 are three genera and in 45 genera 28 of the have single representives, 2 of them are four species, and 1 of that is have six species in Mudasal Odai landing centre. Out of 29 families 20 of them are single genera, 4 of them are two genera, 2 of them are three genera and 1 of that is four genera and in 42 genera 28 of them have single species, 2 of them have four species and 1 of that is have 5 species in Nagapatinam landing centre. Among the families three are (Naticidae, Muricidae and Nassariidae) dominant in both landing centre. Among the 76 species 10 of them are dominant, 23 of them are abundant, 14 of them are co-abundant, 28 of them are present 1 of that absent in Mudasal Odai, among the species, 14 of them are dominant, 19 of them are abundant, 13 of them are co-abundant, 21 of them are present and 8 of them are absent in Nagapattinam coast. Page(s): 2320-2326

Performance, combustion and emission characteristic of a marine engine running on grape seed oil biodiesel blends with nano additive

2014-12-01T00:00:00Z

Title: Performance, combustion and emission characteristic of a marine engine running on grape seed oil biodiesel blends with nano additive Authors: Karthikeyan, S.; Elango, A.; Marimuthu, P.; Prathima, A. Abstract: Present study provides the effect of Cerium Oxide (CeO₂) nano fuel additives on the performance, combustion and emission characteristics of a Grape Seed Oil Methyl Ester (GSOME). Biodiesel blended fuel is prepared by the emulsification technique with the aid of a mechanical agitator. Prepared biodiesel emulsion fuels were mixed with the CeO₂nanoparticles in the mass fractions of 50 and 100 ppm with the help of an ultrasonicator. Fuel properties of B20 (80% Diesel + 20% GSOME), B20CeO₂50 (80% Diesel + 20% GSOME + 50ppm CeO₂), B20CeO₂100 (80%Diesel + 20% GSOME + 100ppm CeO₂) and neat biodiesel were studied and compared according to ASTM standard test methods for biodiesel. Study is carried out at a constant speed of 1500rpm. Experimental results show a significant improvement in the performance and a reduction in harmful emissions for the CeO₂nano additive biodiesel emulsion fuels compared to those of B20. Page(s): 2315-2319

A three dimensional numerical simulation for prediction of oil trajectory due to extraction activity in region between Khark Island and Busher Port in winter, Persian Gulf, Iran

2014-12-01T00:00:00Z

Title: A three dimensional numerical simulation for prediction of oil trajectory due to extraction activity in region between Khark Island and Busher Port in winter, Persian Gulf, Iran Authors: Habibi., S; Bidokhti, A.A Abstract: Present study consists three- dimensional numerical model of the prediction of the movement of oil slicks and diffusion oil particles in the water column. Model has previously been developed in the Assalouyeh Marine Region in the north coast of Persian Gulf, Iran and has been achieved good results. This model has been run for oil spill accident between Khark Island and Busher Port in winter (2005). Model predicts concentration distribution of oil particles and current speeds and directions for 1.7, 7 and 14 hours after spill accident in the water column in 5,10 and 15 meters levels. Numerical results show that oil particles spread towards Khark Island and away from Busher Port in winter. Diffusion oil particles in the water column due to more turbulence are larger. Spreading follow the flow fields that are in good agreement with flow field observations and valid theories and experiment of data runs. Page(s): 2298-2314