Thanjāvūr, India
Thanjāvūr, India

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Maragatham C.,PRIST University | Panneerselvam A.,AWM Sri Pushpam College
Journal of Pure and Applied Microbiology | Year: 2011

Sixteen bacterial strains were isolated from seven varieties of rotten papaya fruits. Out of the sixteen isolates obtained through enrichment techniques ten bacterial isolates were present in more percentage and dominated. The present study was undertaken to investigate the microbiological quality of rotten papaya fruits. Seven different varieties samples of these rotten papaya were collected. The samples were analyzed within an hour of procurement. Isolation, enumeration and identification of the prevalent bacteria were carried out following the standard procedures. Analysis of the rotten papaya samples revealed high loads of bacterial food borne pathogens such as Bacillus subtilis, Staphylococcus aureus, Streptococcus faecalis, Micrococcus sp., Proteus vulgaris, Pseudomonas Sp., Flavobacterium sp., Lactobacillus sp., Serratia marcescens, Aeromonas sp. Total viable counts of bacteria in all the samples varied between 0.4-3.0×10 4 cfu g -1.

Murugesan P.,Annamalai University | Silambarasan A.,Annamalai University | Purusothaman S.,Annamalai University | Muthuvelu S.,Annamalai University | Anantharaj T.,AWM Sri Pushpam College
Indian Journal of Fisheries | Year: 2013

Invertebrate diversity along the south-east coast of India is rich and varied. Though many studies with respect to finfish bycatch resources have been carried out during yesteryears, only scanty information is available on invertebrate bycatch from tropical waters. The importance of invertebrates caught in the trawl bycatch has been recognised only recently by the scientific community, as the utility of invertebrate bycatch is manifold. The present study was undertaken to investigate and generate information on the diversity and species richness of invertebrates landed as trawl bycatch in Cuddalore, Parangipettai and Pazhayar along the south-east coast of India. The study was undertaken in the inshore waters (5- 35 m depth) of Cuddalore, Parangipettai and Pazhayar during Feb 2010 - Jan 2011. Altogether 66 species of invertebrates in Cuddalore, 75 in Parangipettai and 76 in Pazhayar were recorded during the study. The percentage composition revealed that in Cuddalore and Parangipettai, brachyuran crabs were the dominant group (37% and 46% respectively) followed by cephalopods (35% and 31 % respectively), while in Pazhayar, gastropods dominanted (29%) followed by shrimps (24%) and other invertebrates were meagre. Diversity indices estimated showed variation between the regions. Shannon-Weiner diversity index ranged from 2.035 to 4.776; Margalef s richness index from 2.306 to 6.782; Pielou's evenness index varied from 0.488 to 0.957; taxonomic diversity varied from 45.08 to 83.53 and total phylogenetic diversity ranged from 733.33 to 1716.8.

Chinnappa L.,AWM Sri Pushpam College | Chinnappa L.,Rajah Serfoji Government College | Ravichandran K.,AWM Sri Pushpam College | Sakthivel B.,AWM Sri Pushpam College
Proceedings of the Indian National Science Academy | Year: 2013

Doubly doped (antimony + fluorine) tin oxide films are deposited by a simplified spray pyrolysis technique using perfume atomizer from precursor solutions having different molar concentrations (0.1 M to 0.7 M in steps of 0.2 M). The fluorine doping level is varied as 20 at.%, 30 at.% and 40 at.%, but the antimony doping level is kept constant at 2 at.%. From the X-ray diffraction analysis, it is understood that the preferred orientation of SnO2:F: Sb films is (211) for lower doping level of F where as at higher F doping level it is (200). The average optical transmittance in the visible range is 85%. For lower molar concentrations, minimum sheet resistance (Rsh) is obtained for 30 at.% of fluorine doping level, whereas in the case of higher molar concentrations minimum Rsh is observed for higher doping level. The EDS spectra reveal that the doubly doped tin oxide films have good stoichiometry. The SEM micrographs recorded for the films showed that the microstructure of the films is altered by the level of fluorine doping. © Printed in India.

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