INVESTIGATION OF PHYSICO-CHEMICAL PROPERTIES OF RHIZOSPHERE SEDIMENTS FROM EAST COAST REGION, TAMIL NADU, INDIA

Objective: The objective of the present study was aimed the physicochemical properties of rhizosphere sediments from the East coast region of Tamil Nadu, India, have been investigated for soil pH, ion contents, organic contents, N and P, as well as obtaining the defined data from samples collected at different depths.Methods: A total of 25 sediment samples from five different locations was collected at a depth of 5–20 cm from the earth's surface and analyzed for the physicochemical parameters by standard methods.Results: The physical parameters of sediment show pH 8.02–8.36, salinity shows high in the aqueous solution of clayey sediment, ranging from a minimum of 3.2 and maximum of 5.4 dsm−1. Lime content and texture shows silt to clay loam, respectively. The chemical parameters include macronutrients such as nitrogen (N), phosphorus (P), potassium (K) and micronutrients such as zinc (Zn), copper (Cu), iron (I), and manganese (Mn) were analyzed. The N, P, and K ranged from 87.5–110.5 (kg/ac), 2.9–4.5 (kg/ac), 132–169 (ppm) and the micronutrients ranged from 1.2–1.36, 0.70–1.06, 5.63–9.64, and 3.06–3.63 mg/kg, respectively.Conclusion: The nutrient contents of the coastal sediment may vary depending on the fluctuation of the nutrient cycle from high to low. The physical properties of the soil were strongly correlated with soil fertility. Favorable physical properties occurs in highly weathered and nutrient depleted soils and limiting physical properties occurs in the least weathered and more fertile soils. Hence, they require frequent analysis of physicochemical parameters to enhance the growth of plants in a successful manner.Keywords: East coastal sediments, Physico-chemical parameters, Macro and micronutrients

A STUDY ON UTILIZATION OF INFORMATION AND COMMUNICATION TECHNOLOGY BY THE FACULTY MEMBERS OF ARTS AND SCIENCE COLLEGES IN MAYILADUTHURAI TALUK- A GENDER APPROACH

This study aims at a study on utilization of information and communication technology by the faculty members of Arts and Science colleges in Mayiladuthurai Taluk- A gender approach. Totally 335 questionnaires were distributed among the faculty members of Arts and Science College. Out of 335 questionnaires, 290 questionnaires were received back. This study found that gender wise distribution of the respondents, preference of ICT based resources, frequency of ICT based resources. It is found that majority of the respondents are female, majority of the respondent’s access resources very often

Effect of Buoyancy and Magnetic Field on Unsteady Convective Diusion of Solute in a Boussinesq Stokes Suspension Bounded by Porous Beds

Hydromagnetic free and forced convection in a parallel plate channel bounded by porous bed and transverse magnetic field has been considered. When there is a uniform axial temperature variation along the walls, the primary flow shows incipient flow reversal at the upper plate for an increase in temperature along that plate. Similarly flow reversal at the lower plate occurs with a decrease in temperature along that plate. The magnetic field, arising as a body couple in the governing equations is shown to increase the axis dispersion coefficient. The effect of various physical parameters such as Hartmann number, Grashof number, porous parameter and couple stress parameter on the velocity, temperature and dispersion coefficient, mean concentration, skin friction coefficient and Nusselt numbers are computed and analyzed through graphs

Cucurbit[8]uril Rotaxanes

The synthesis of [2]rotaxanes, each comprising a viologen core threaded through a cucurbit[8]uril (Q8, Figure 1) macrocycle and stoppered by tetraphenylmethane groups, and their binding to second guests as inclusion complexes in organic and aqueous media are described. Stoppering was observed to have little effect on binding. Chemical modification of the threaded guest was used to control solubility and binding characteristics, thus demonstrating a novel approach to making artificial receptors with readily modifiable properties