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I. S. Bright Singh

Bio: I. S. Bright Singh is an academic researcher from Cochin University of Science and Technology. The author has contributed to research in topics: Penaeus monodon & Shrimp. The author has an hindex of 24, co-authored 120 publications receiving 1876 citations.


Papers
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Journal ArticleDOI
TL;DR: The higher yield coefficient and growth rate of AMOPCU-1 suggest better energy conversion efficiency and higher CO2 fixation potential and the consortia may find application in the establishment of nitrification within marine and brackish water culture systems.
Abstract: Two distinct nitrifying bacterial consortia, namely an ammonia oxidizing non-penaeid culture (AMONPCU-1) and an ammonia oxidizing penaeid culture (AMOPCU-1), have been mass produced in a nitrifying bacterial consortia production unit (NBCPU). The consortia, maintained at 4°C were activated and cultured in a 2 l fermentor initially. At this stage the net biomass (0.105 and 0.112 g/l), maximum specific growth rate (0.112 and 0.105/h) and yield coefficients (1.315 and 2.08) were calculated respectively, for AMONPCU-1 and AMOPCU-1 on attaining stationary growth phase. Subsequently on mass production in a 200 l NBCPU under optimized culture conditions, the total amounts of NH4 +–N removed by AMONPCU-1 and AMOPCU-1 were 1.948 and 1.242 g/l within 160 and 270 days, respectively. Total alkalinity reduction of 11.7–14.4 and 7.5–9.1 g/l were observed which led to the consumption of 78 and 62 g Na2CO3. The yield coefficient and biomass of AMONPCU-1 were 0.67 and 125.3 g/l and those of AMOPCU-1 were 1.23 and 165 g/l. The higher yield coefficient and growth rate of AMOPCU-1 suggest better energy conversion efficiency and higher CO2 fixation potential. Both of the consortia were dominated by Nitrosomonas-like organisms. The consortia may find application in the establishment of nitrification within marine and brackish water culture systems.

15 citations

Journal ArticleDOI
06 Aug 2016
TL;DR: The DNA obtained was of high quality with minimal shearing making it most suitable for the construction of large insert genomic libraries, and PCR amplification of 16S rRNA gene confirmed that the filtration method was effective in the isolation of high-quality DNA.
Abstract: Recent advances in culture-independent studies of microbes had proved to be more reliable and efficient than the conventional ones. The isolation of good quality and quantity of total community DNA are one of the major hurdles in this endeavour. Shearing of DNA during the extraction process and the co-extraction of inhibitory compounds reduce the quality of the isolated nucleic acids making it unsuitable for the construction of large insert metagenomic libraries. In the present study, a multi-level filtration step was brought in which efficiently isolated total bacterial DNA from three different environment samples. The preprocessing method could efficiently improve the 260/230 ratio of the isolated DNA by 2.3–45 % and decreased the protein contamination by 22.5–34.5 % on saltpan and arctic sediment samples, respectively. The more significant part of the experiment was that the DNA obtained was of high quality with minimal shearing making it most suitable for the construction of large insert genomic libraries. PCR amplification of 16S rRNA gene confirmed that the filtration method was effective in the isolation of high-quality DNA.

15 citations

Journal ArticleDOI
TL;DR: Culture conditions of antagonistic probiotics, Pseudomonas MCCB 102 and 103, were optimized to enhance their biomass production and antagonistic activity against the shrimp pathogen V. harveyi.
Abstract: Rapid growth of shrimp farming industry is affected by the recurrence of diverse diseases, among which vibriosis is predominant. Eco-friendly disease management strategy by the application of antagonistic probiotics is widely accepted. In the present study, culture conditions of antagonistic probiotics, Pseudomonas MCCB 102 and 103, were optimized to enhance their biomass production and antagonistic activity against the shrimp pathogen V. harveyi MCCB 111. Primarily, one-dimensional screening was carried out to fix the optimum range of sodium chloride concentration, pH and temperature. The second step optimization was done using a full-factorial central composite design of response surface methodology. As per the model, 12.9 g/L sodium chloride and pH 6.5 for Pseudomonas MCCB 102, and 5 g/L sodium chloride and pH 7 for Pseudomonas MCCB 103 were found to be ideal to maximize antagonistic activity. However, optimum temperature was the same (25 °C) for both isolates. Finally, the models were experimentally validated for enhanced biomass production and antagonistic activity. The optima for biomass and antagonistic activity were more or less the same, suggesting the possible influence of biomass on antagonistic activity.

15 citations

Journal ArticleDOI
TL;DR: Significant reduction in organic matter could be effected by marine actinomycetes in P. monodon larval rearing system and combination of Streptomyces and Nocardiopsis strains can be effectively used as bioremediators in shrimp hatchery.

14 citations

Journal ArticleDOI
TL;DR: The results indicate that the recombinant baculovirus with shrimp specific viral promoters (hybrid) can be employed for delivery of foreign genes to shrimp cells for in vitro transformation.
Abstract: It has been realized that shrimp cell immortalization may not be accomplished without in vitro transformation by expressing immortalizing gene in cells. In this process, efficiency of transgene expression is confined to the ability of vectors to transmit gene of interests to the genome. Over the years, unavailability of such vectors has been hampering application of such a strategy in shrimp cells. We report the use of recombinant baculovirus mediated transduction using hybrid promoter system for transgene expression in lymphoid cells of Penaeus monodon. Two recombinant baculovirus vectors with shrimp viral promoters (WSSV-Ie1 and IHHNV-P2) were constructed (BacIe1-GFP and BacP2-GFP) and green fluorescent protein (GFP) used as the transgene. The GFP expression in cells under the control of hybrid promoters, PH-Ie1 or PH-P2, were analyzed and confirmed in shrimp cells. The results indicate that the recombinant baculovirus with shrimp specific viral promoters (hybrid) can be employed for delivery of foreign genes to shrimp cells for in vitro transformation.

13 citations


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TL;DR: This book by a teacher of statistics (as well as a consultant for "experimenters") is a comprehensive study of the philosophical background for the statistical design of experiment.
Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

13,333 citations

Journal ArticleDOI
TL;DR: This review provides a summary of the use of probiotics for prevention of bacterial diseases in aquaculture, with a critical evaluation of results obtained to date.

1,042 citations

Journal ArticleDOI
TL;DR: This study is a review of the recent literature on the use of natural and modified lignocellulosic residues for Cr adsorption and finds that many by-products of agriculture have proved to be suitable low cost adsorbents for Cr(VI) and Cr(III) removal from water.

782 citations

Journal ArticleDOI
TL;DR: This review provides a comprehensive summary of probiotics in aquaculture with special reference to mollusc culture.

756 citations