http://localhost:80/xmlui/handle/123456789/35 2026-04-08T03:43:10Z 2026-04-08T03:43:10Z Ghosh, Rinku http://localhost:80/xmlui/handle/123456789/37 2014-09-02T07:32:19Z 2014-09-02T00:00:00Z

Title: Deshbhgaer Tragedy Nari o Ekti Hindi Golpo Authors: Ghosh, Rinku

2014-09-02T00:00:00Z Paul Bhattacharya, Sudipta Bhattacharjee, Debolila http://localhost:80/xmlui/handle/123456789/177 2012-01-10T03:38:14Z 2012-01-10T00:00:00Z

Title: A Study on The Isolation of Biofilm Producing Microorganisms and Characterization of Their Extracellular Polymeric Substances (EPS) From Sundarban Mangrove Area Authors: Paul Bhattacharya, Sudipta; Bhattacharjee, Debolila Abstract: A biofilm is a community of bacteria that are formed under stress conditions. The bacterial aggregate produce extracellular polymeric substances (EPS) forming a thick layer covering the bacteria, aiding the cell survive this adverse condition. EPS establish the functional and structural integrity of biofilms and are considered the fundamental component that determines the physiochemical properties of a biofilm. Naturalsamples were collected from mangrove areas of Sundarban and looked for their biofilm forming potential. Although isolates from all the six samples including soil, water and tree surface showed significant biofilm formation, Jetty 2 sample showed most dense biofilm formation even in high salt condition when allowed to grow on solid media. Due to good enough EPS production, Jetty 2 sample was sub-sampled into sample A to E and their EPS were characterized further biochemically. Sample B was found to contain maximum carbohydrate content whereas sample A & C had high protein content. The RNA content was found to be less than standard solution for all the samples. Presence of extracellular enzymes like protease,phosphatise and lipase were also tested. Although the enzyme protease was present in all samples, sample A showed significant amount of the enzyme phosphatase and lipase activity compared to other samples. Description: Climate Change, Mangrove & Sustainable Management

2012-01-10T00:00:00Z Mukhopadhyay, Dr. Mahuya Mitra, Ranjabati http://localhost:80/xmlui/handle/123456789/176 2012-01-10T03:33:33Z 2012-01-10T00:00:00Z

Title: Isolation of Endophytes from Phoenix Paludosa (Hetal) of Sundarban Biosphere Reserve and To Explore Their Potentials for Bioactive Compounds Authors: Mukhopadhyay, Dr. Mahuya; Mitra, Ranjabati Abstract: The Sundarban Biosphere Reserve extends in India and Bangladesh, is densely covered by mangrove forests, and is one of the largest biodiversity reserve. The present Sundarban National Park was declared as the core area of Sundarban Tiger Reserve in 1973 and a wildlife sanctuary in 1977 and it has been designated as a Ramsar site since 1992. The Mangrove forest is inhabitant by different floral population like Sonneratia, Phoenix paludosa ,Excoecaria agallocha etc. Endophytes are a group of microorganism that grow within the tissues of higher plants and colonize them without causing any noticeable injury to the host. Both bacteria and fungi are considered as endophytes. Endophytes represent a potential hub of novel bioactive compounds such as antibiotics, anticancer and other biological control agents. Phoenix paludosa belongs to the family Arecaceae and is salt tolerant mangrove plant. . The plants were collected from the Sundarban Biosphere Reserve near Pakhiralay, an Island. Altogether 15 strains of bacteria were isolated from the roots, leaves and stem of the plant. The bacterial population showed a high level of growth hormone production namely Auxin and Gibberellins to the levels ranging from 160 to 300μg/ml and 173μg/ml to 426 μg/ml respectively. The bacterial population even showed antimicrobial activity against human pathogenic strains such as Escherichia coli, Vibrio cholerae, Klebsiella sp. Psuedomonas aeruginosa, Acinetobacter baumannii and Burkholderiasepsia. Thus the study suggests that these microbes have huge potential to synthesis of numerous novel compounds that can be exploited in pharmaceutical, agricultural and other industries. Description: Climate Change, Mangrove & Sustainable Management

2012-01-10T00:00:00Z Gupta, Madhulika Banerjee, Sushreeta http://localhost:80/xmlui/handle/123456789/175 2012-01-10T03:29:01Z 2012-01-10T00:00:00Z

Title: Role of Filamentous Cyanobacteria Isolated from Sundarbans in Environmental Clean up Authors: Gupta, Madhulika; Banerjee, Sushreeta Abstract: Colours give delightful pleasure to eyesight but at the same time they may act as serious pollutants when their origin is dyes and dyestuffs. The dyes are stable and difficult to be degraded due to their synthetic origin and complex aromatic molecular structures. During the synthesis of dyes and other processes it is estimated that about 10-15% of the total production of colorants is lost. The most obvious indicator of water pollution is the coloured industrial effluent. Moreover the presence of heavy metals collectively make the textile effluent highly toxic. The discharge of highly coloured synthetic dye effluents cause considerable damage to the aquatic and human life and is aesthetically very unpleasant. In this project we have isolated Cyanobacteria from the water samples collected from Sundarbans, the land of the mangroves, declared as the World Heritage site in1987. We have proceeded with the filamentous Cyanobacteria for the purpose of decolourisation of textile dyes Direct Blue and Reactive Pink. For Direct Blue (90%) decolourisation occurred but was while quite less for Reactive pink. Microscopic and viability studies were performed. This filamentous Cyanobacteria showed maximum uptake of cadmium and chromium at a concentration of 100mg/l and 200mg/l respectively. Effect of heavy metals on the chlorophyll of Cyanobacteria was also studied. Thus the filamentous Cyanobacteria isolated from the collected water samples of Sundarbans effectively decolourises textile dyes and also reduces the harmful toxicity of heavy metals released from the industrial effluents making the aquatic bodies less toxic for the survival of the living organisms. Description: Climate Change, Mangrove & Sustainable Management

2012-01-10T00:00:00Z