Study of zooplankton emergence pattern and resting egg diversity of recently dried waterbodies in North Maharashtra Region

Seasonal patterns of temperature, pH, conductivity dissolved oxygen, phosphate and sulphate have been studied on the basis of physico-chemical characteristics of pond ecosystem. Importance of soil egg banks and their contribution to the diversity in freshwater ecosystem has been studied. We have focussed our attention on soil egg bank diversity and zooplankton emergence patterns of some recently dried aquatic habitats, comparing to that of neighbouring temporary pools with the permanent ponds. The emergence pattern from the soil egg bank followed an orderly succession from Protists-Rotifers and Crustaceans have been investigated. Dominant Protists emerged from the egg bank were Lacrymaria within rotifers. They were the first to emerge followed by Hexarthra blooms. The diversity of zooplankton in permanent ponds was significantly higher (i.e., 19) than the diversity in the ephemeral pools (i.e., 08). However; the zooplankton abundance in the ephemeral pools was higher with more than an order of magnitude, than that in ponds. Interestingly the number of species recorded in the egg bank was more than those present in the water columns of the pools. We have recorded 08 species of rotifera i.e. Lecane sp L curvicornis, L. bulla, K. quadrata, B. patulus, B. rubens, Branchionus calyciflorus, Testudinella sp which were not present in the neighboring permanent or ephemeral waterbodies during that period. Unequivocally suggest that in order to understand the zooplankton biodiversity; it is also important to evaluate the diversity of egg bank present in the sediment. A total 19 species were recorded including Copepoda 06 sp, Cladocera 05 sp and Rotifera 08 sp.     

Edible films and coatings for food packaging applications: a review

Environmental Chemistry Letters - Food preservation technologies are currently facing challenges in prolonging the shelf life of perishable food products. The uses of edible films and coatings...     

The Potential of Pulse-Jet Baghouses for Utility Boilers Part 3: Comparative Economics of Pulse-Jet Baghouse,Precipitators and Reverse-Gas Baghouses

Pulse-jet fabric filters (PJFFs) are widely used in U.S. industrial applications, and in both utility and industrial boilers abroad. Their smaller size and reduced cost relative to more conventional baghouses make PJFFs an attractive particulate control option for utility boilers. This article which is the third in a three-part series, compares the cost of PJFFs with electrostatic precipitators (ESPs) and reverse-gas baghouses (RGBs).

This article presents the capital, operating and maintenance (O&M), and level-ized costs for ESPs, RGBs and PJFFs. The particulate control equipment design and pricing are supplied by manufacturers of the control equipment. A comparison of costs for a base case 250-MW boiler indicates that the PJFF capital cost is 22 percent lower than the cost of an ESP with 400 SCA and 12-inch plate spacing; in addition the PJFF is 35 percent lower than the cost of an RGB. The levelized cost for a PJFF is about equal to the cost of the ESP but 14 percent lower than the cost of the RGB. Overall, the attractiveness of a PJFF versus an ESP depends on the coal type and the outlet emissions limit required. PJFF is favored when low-sulfur coal is fired due to the high-resistivity fly ash. Also, PJFF is favored as more stringent outlet emission rates are required.