12-14 September, 2011, Lucknow - Earth Science India

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National Conference on Science of Climate Change and Earth’s Sustainability: Issues and Challenges ‘A Scientist-People Partnership’ 12-14 September, 2011, Lucknow INTERPLAY BETWEEN POLLEN AND EXTANT VEGETATION IN WETLAND ENVIRON OF LOWER BRAHMAPUTRA FLOODPLAIN OF ASSAM, INDIA Swati Dixit and S.K. Bera Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226 007 email: swatidixit26@gmail.com A total of twenty eight surface samples (9 dry soil samples and 19 mud samples) were procured from two major wetlands namely Hasila and Deepor beel of Goalpara and Kamrup Districts of Lower Brahmaputra valley, Assam. The samples were palynologically analyzed to determine the composition of pollen deposited on the surface sediments. The study predicts that inspite of partial coherence between modern pollen rain and extant vegetation due to differential pollen productivity, dispersal and deposition, pollen frequencies of surface samples somehow portrays the extant floral distribution in and around the wetland which is well evidenced from our studies where relative frequency of the assemblage includes local arboreals at the average value of 42.94% and 28.53% at near proximity of forest, 24.27% and 18.97% at upland area and within 11% at submerged area of Deepor and Hasila wetland respectively. Thus, the surface samples from near proximity of the woods dominate in the arboreal pollen percentages which are quite relevant to extant floral composition. However, under representation of Shorea robusta as a dominant ingredient of nearby forest could be attributed due to poor preservation of its pollen in sediment despite its high productivity. Low profile of phytoplankton viz., diatoms/desmids indicates poor water condition and preservation status in the wetland sediments. The representation of fungal elements belongs to Deuteromycetes and Ascomycetes (grass pathogen) as evidenced by degraded pollen and spores are suggestive of biological degradation in wetland sediments. Therefore, there is a need to precisely observe the behavioural pattern of modern pollen deposition which could be helpful in inferring past climate and vegetation in and around the pristine wetland ecosystem. 66
National Conference on Science of Climate Change and Earth’s Sustainability: Issues and Challenges ‘A Scientist-People Partnership’ 12-14 September, 2011, Lucknow HYDROGEN ENERGY TECHNOLOGY AND CHALLENGES Y.K. Vijay University of Rajasthan, Jaipur India has drawn a national hydrogen energy road map which has been approved by national hydrogen board in 2006. Road map visualizes commercial production of one million hydrogen fuel vehicles (mostly 2 and 3 wheelers) and establishment of 1000 MW aggregate hydrogen based power generation capacity. Required investment has been suggested for infrastructure development by hydrogen economy programmed. We have experienced that when technologically complex programmers with huge investment has to be realized in a time bound manner, it is necessary to identified number of milestones and real time corrective mechanisms to keep the programmed. Similarly, a large number of private, public sector and academic institutions are working on the development of fuel cells in which hydrogen and oxygen combine to produce electricity and water. IOC R&D has introduced hydrogen-CNG blend as fuel in vehicles, created a hydrogen dispensing station and hydrogen fueling station. From the analysis of this experience, we can see that we are yet to reach to common man. Meanwhile, there has been some progress in developing large scale production of hydrogen through gasification of coal and biomass, thermo-chemical splitting of water and solar assisted hydrogen production. In India, R& D efforts are in progress with support from the MNRE Govt. of India, and many institutions like BHU has developed hydrogen motorcycles by converting existing petrol driven motorcycles to operate with hydrogen, IIT Delhi has worked on developing 2.5 KVA output alternator by coupling a 5hp engine using hydrogen as the fuel. Similarly, a large number of private, public sector and academic institutions are working on the development of fuel cells in which hydrogen and oxygen combine to produce electricity and water. IOC R&D has introduced hydrogen-CNG blend as fuel in vehicles, created. In the University of Rajasthan, considerable efforts have been made to teach different aspects of Hydrogen production, storage, purification and ecological aspects at research level and PG teaching level. The talk will cover the innovative methods of hydrogen production through multi electrodes cell as conceptual on-board fuel production for vehicles, purification by polymer membranes and hydrogen storage in thin films and bulk metal hydrides as safe storage. 67
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12-14 September, 2011, Lucknow - Earth Science India

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