INDIAN SCIENCE CONGRESS - India Environment Portal

54
Proc. 98th Indian Science Congress, Part II : Abstracts of Oral/Poster Presentation
medium after immersion of the wooden cubes, it can be concluded that the yeast
cells were immobilized in the perforated wooden cubes. Fermentation was carried
out with Immobilized Packed Bed in a glass Fermenter column. Circulation of the
mahua wort through the column by means of a pump continued for several hours.
Evolution of C02 generated from sugar to ethanol was observed and the reaction
being exothermic the circulating liquid was continuously cooled in a glass
condenser Special technique was adopted to keep the wooden cubes under
flooded condition while the liquor being continuously circulated. To determine the
efficacy of immobilization, circulation of liquor was carried out at various flow
rates with the help of metering pump and samples at definite intervals were taken
to examine if cells are dislodged from the surface of wooden cubes due to
increasing shear force with increasing flow rate of circulating liquid. The critical
flow rate was recorded beyond which the cells became mobile and also the rate
of fermentation declined at higher flow rates due to lower contact time
(residencetime) between the circulating liquor and immobilized cells. The results
obtained are extremely encouraging which could be meaningfully utilized for
commercial exploitation.
69. Insect-Fungus Interaction in the Development of Leaf Spot Disease in
High Altitude Mango Plant and Its Control
Pip Banerjee, Priyanka Lahiri*, Ishita Mukherjee,
Ayantika Bhattacharya, Rohit Das, Gaurav Saha and Dipanjali Saha
Department of Microbiology
St. Xavier’s College 30,
Park Street, Kolkata,
West Bengal-700016
Keywords : Dwarf mango variety, White spot, Brown Spot, Gall, fungicide,
Malathione,
In our project we studied the mechanism of disease incidence by a fungal
pathogen- Cercospora mangiferae, its agonistic relationship between an insect
of Procantarinia sp of the Lepidoptera group and then suggest a fungicide to
prevent such occurrence. The sample was collected from a place called Jorolle
(NH 88) near a place called Sundemagar 10 kms away from the Beas-Sutlej