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Sourav Dey,Sujit Mandal 대한공간정보학회 2019 Spatial Information Research Vol.27 No.1
Channel migration is perhaps the most rampant quasi-natural hazard that is commonly experienced in the eastern Himalayan foothills of Duars and Tal region, India. The present study is dealt with the Torsa River, which is situated in the Duars and Tal region. The study aims at the changing rate of channel migration and vulnerability of the Torsa River in Duars and Tal region on spatial and temporal basis using geospatial methods. The changing course of the Torsa River was detected using remote sensing and GIS since 1977–2018 (42 years). USGS Landsat MSS, ETM, OLI_TRIS sensor data (1977, 2010 and 2018) were considered to demarcate the chronological changes of the river course. Normalized Difference Water Index was used to extract the surface water bodies. Sixteen cross sections have been considered to delimit the river course migration pattern. The results showed that the Torsa River course has been migrating towards the right bank at different places of the study area. In the downstream of Patla Khawa Protected Forest, the continuous lateral migration of the river Torsa and associated river bank erosion invited the loss of agricultural land and socio-economic vulnerability in most of the villages of Cooch Behar I, Cooch Behar II and Mathabhanga II blocks of Cooch Behar district, West Bengal. Therefore, the present study may be helpful for ensuing suitable site specific management options which may check future river bank erosion as well as loss of livelihood and properties.
Bhushan, Shashi,Gogoi, Mandakini,Bora, Abhispa,Ghosh, Sourav,Barman, Sinchini,Biswas, Tethi,Sudarshan, Mathummal,Thakur, Ashoke Ranjan,Mukherjee, Indranil,Dey, Subrata Kumar,Chaudhuri, Shaon Ray The Korean Society for Microbiology and Biotechnol 2019 한국미생물·생명공학회지 Vol.47 No.2
Earlier studies by our group revealed that gallic acid in phytochemicals stimulated biofilm production in epiphytes, while caffeic acid in phytochemicals inhibited biofilm production in non-epiphytes. It is well documented that antimicrobial secretion by some epiphytic bacteria inhibits non-epiphytic bacterial growth on leaf surfaces. These selection criteria help plants choose their microbial inhabitants. Calcium and iron in phytochemicals also stimulate biofilm formation and thus, may be selection criteria adopted by plants with respect to their native epiphytic population. Furthermore, the processing of leaves during phytochemical extraction impacts the composition of the extract, and therefore its ability to affect bacterial biofilm formation. Computation of the Hurst exponent using biofilm thickness data obtained from the Ellipsometry of Brewster Angle Microscopic (BAM) images is an efficient tool for understanding the impact of phytochemicals on epiphytic and non-epiphytic populations when compared to fluorescent microscopy, scanning electron microscopy, and staining techniques. To the best of our knowledge, this is the first report that uses the Hurst exponent to elucidate the mechanism involved in plant microbe interaction.
Shashi Bhushan,Mandakini Gogoi,Abhispa Bora,Sourav Ghosh,Sinchini Barman,Tethi Biswas,Mathummal Sudarshan,Ashoke Ranjan Thakur,Indranil Mukherjee,Subrata Kumar Dey,Shaon Ray Chaudhuri 한국미생물·생명공학회 2019 한국미생물·생명공학회지 Vol.47 No.2
Earlier studies by our group revealed that gallic acid in phytochemicals stimulated biofilm production in epiphytes, while caffeic acid in phytochemicals inhibited biofilm production in non-epiphytes. It is well documented that antimicrobial secretion by some epiphytic bacteria inhibits non-epiphytic bacterial growth on leaf surfaces. These selection criteria help plants choose their microbial inhabitants. Calcium and iron in phytochemicals also stimulate biofilm formation and thus, may be selection criteria adopted by plants with respect to their native epiphytic population. Furthermore, the processing of leaves during phytochemical extraction impacts the composition of the extract, and therefore its ability to affect bacterial biofilm formation. Computation of the Hurst exponent using biofilm thickness data obtained from the Ellipsometry of Brewster Angle Microscopic (BAM) images is an efficient tool for understanding the impact of phytochemicals on epiphytic and non-epiphytic populations when compared to fluorescent microscopy, scanning electron microscopy, and staining techniques. To the best of our knowledge, this is the first report that uses the Hurst exponent to elucidate the mechanism involved in plant microbe interaction.