Some threshold results of ecological competition model with reserve for one species and harvesting at fixed rates.

In the present investigation the stability analysis of a two-species competing ecological model with reserve for one species and harvesting at fixed rates is highlighted in view of principle of competitive exclusion due to Gause (1934). The model is characterized by a pair of non-linear system of ordinary differential equations. The equilibrium states are identified and a threshold theorem is derived to establish the stability of the co-existent equilibrium state

EFFECTS OF URBANIZATION OF RUNOFF FROM SMALL WATERSHEDS

Abstract not availabl

Effectiveness of thermoil granodine against the corrosion of aluminum and Al-Cu alloy in chloride solutions

155-161 The corrosion of aluminum and aluminum-copper alloy in 0.1 N NaCl solution has been studied by linear polarization technique. Current-potential data were obtained from which Icorr values and corrosion rates were estimated using Stern-Geary equation and Faraday’s laws. The phosphatizing chemical, thermoil granodine (trade name) was used as the inhibitor to study the effect of inhibitor on the corrosion of Al and 4 % Cu – Al alloy in chloride solutions. The optimum inhibitor concentration for maximum inhibition was determined and the effectiveness of the inhibitor was evaluated. The inhibition efficiency ranged from 40 to 65% for pure aluminum and 70 to 96% for aluminum-copper alloy. </smarttagtype

Jejunal Perforation: A Rare Presentation of Burkitt’s Lymphoma—Successful Management

Malignant tumors of the small bowel presenting as acute abdomen are a rare occurrence. Burkitt’s lymphoma presenting as a surgical emergency needing emergency laparotomy is an uncommon presentation of this tumor. We present an interesting case of jejunal perforation as a first manifestation of Burkitt’s lymphoma which was successfully managed with surgical resection, high dose chemotherapy, and good supportive care

Studies on ionic mass transfer with insert helical tape promoters in batch fluidized beds

694-700Augmentation of mass transfer coefficients, due to the presence of helical tape promoters in batch fluidized beds has been presented. Mass transfer coefficients have been evaluated from the measured limiting current densities and the concentrations of the reacting ions. The variables studied are the geometric parameters of the promoter-tape width, pitch and diameter of the promoter rod, the flow rate of the electrolyte, void fraction and particle diameter. It is found that kL increased with increased flow rate and particle diameter. The increase in tape width and diameter of the promoter rod resulted in slightly increased mass transfer coefficients. Pitch of the promoter showed negligible effect on kL

Mangrove environment and its sediment characters in Godavari estuary, east coast of India

64-66True mangrove plants and associated mangroves were present near to the waterfront whereas other halophytes were present near the transitional zone. High density of mangrove population was observed where silt was high in the sediments of mangrove environment