Volume-7 ~ Issue-11 ~ November-2014

Abstract: Nutrients present in a soil are the most important elements required for the healthy growth of plants and soil fertility is the status of the soil to supply nutrients to plants in adequate amounts and in suitable proportions. Soil fertility may be influenced by the water quality of the tanks used for irrigation. Study was conducted to evaluate the soil fertility status of selected command areas of three lakes- Eachanur, V. Mallenahalli and Halkurke in Tiptur taluk. The variables tested included pH, EC, OC, N, P, and K. The study revealed that the pH of the soil samples ranged from 7.07 to 7.87 and was on slightly alkaline side but within the limit of 6.5-8.5 which is optimum for crops. EC values ranged from 0.26dSm-1 to 0.485dSm-1 and were within the limit of 0.8dSm-1 indicating low salinity status of the soils. OC content ranged from 0.50% to 0.67% and all the samples were of medium rating. Available nitrogen ranged from 54.825kg/ha to 85.72kg/ha; available phosphorous ranged from 5.33kg/ha to 10.79kg/ha and samples were nitrogen and phosphorous deficient. Potassium ranged from 156.18kg/ha to 434.38kg/ha and samples were of medium rating except one sample of high rating with respect to potassium.

Key words: lakes, nutrients, optimum, organic carbon, plant growth, soil fertility.

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Abstract: The new Schiff bases are synthesis from various and aldehyde and amine under magnetic stirrer method .The synthesized Schiff base were characterized by spectral techniques (UV-Spectra & IR-Spectra). And the Schiff base are yellow colour solid and having sharp melting point and insoluble in organic solvents.

Keywords: New Schiff bases, sharp melting point, yellow solid colour

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Abstract: The objective of current study is to explore the potential use of a bimetallic inorganic cation exchanger, titanium tin molybdate (TSM) for the removal of methylene blue from aqueous solution. TSM was synthesized by co-precipitation method, surface morphology was studied by using SEM and other physic-chemical characteristics were done using FTIR, XRD, TGA etc. The exchanger shows high ion exchange capacity of 1.56 meqg−1 as well as good chemical and thermal stability. The distribution studies of various metal ions on this material in different solvent systems showed that it was highly selective for Pb(II), Cd(II) and Cu(II). The UV-Vis DRS studies exposed the enhanced adsorption capability of the material towards methylene blue (MB), a hazardous organic pollutant.

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Abstract: This study was conducted to investigate the effect of the age of poultry manure particulate on the bioremediation process of crude oil contaminated soil. pH, Total Hydrocarbon Content(THC) and Total Microbial Count(TMC) were measured to monitor the performance of four soil samples weighing 4kg each. These samples were polluted with 0.2kg of crude oil per kilogram soil; and amended with particulates and fertilizer of 0.2kg and 0.08kg per kilogram soil respectively. The age of particulate used in each sample varied in no particular order from 3days to 126 days.

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Abstract: Bimetallic CuNi nanoparticles (BMN) have been successfully synthesized using metal chloride precursors via chemical reduction method without any protective agent and inert gas protection. The powder XRD indicates the formation of CuNi nanoparticles is face-centered cubic structure (fcc) and the particle size as approximately 4nm which is confirmed by finding the morphology using SEM analysis. The elemental composition reveals the formation of bimetallic alloy is in the ratio (1:1). The VSM data indicates the formed CuNi alloy exhibits the ferromagnetic behavior.

Keywords: Bimetallic nanoparticles (BMN), Chemical reduction, x-ray diffraction (XRD)

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Abstract: The influence of 1.31PS organoclay content relative to PGV grade on the properties of PVC compounds was analyzed. Dielectric properties (i.e. permittivity ' & dielectric loss " ) of the PVC nanocomposites were investigated in the frequency range 102 - 105 Hz at room temperature  25 oC. In addition to the dielectric properties the experimental data of conductivity term  were also detected. The initial results show that nanoparticles of 1.31PS clay can improve electrical insulation properties of PVC by lowering "(at 2.5 phr) and  (at 4 phr). The nano 1.31PS shows a significant influence on the electrical resistivity of PVC by enhancing it up to 1.4 x 10-11 ohm.cm. Biodegradation percentage (BD%) and optical density (OD) of tested samples have been screened in testes against both Gram-positive bacteria such as Micrococcus luteus RM1 and Gram-negative bacteria such as Pseudomonas aeruginosa HR1

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Abstract: In the present work, 2-methylcyano-5-(2'-thiophene)-1,3,4-oxadiazole has been prepared expeditiously by microwave irradiation.Condensation of Cyanoacetic acid hydrazide and 2-thiophenecarbaldehyde gave the corresponding hydrazone which on oxidative cyclisation with Chloramine T under microwave irradiation gave the corresponding 2,5- disubstituted -1,3,4-Oxadiazole.The product is obtained in a good yield with high purity. The structure of the synthesized compound is established by FTIR and 1HNMR. The study reveals that oxidative transformation under microwave irradiaton is clean and rapid. The reaction conditions and the work up procedures are mild , simple and convenient.

Key words: 2-methylcyano-5-(2-thiophene)-1,3,4-oxadiazole, Chloramine-T.

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Abstract: Multiwalled Carbon Nanotubes (MWCNTs) produced by the arc discharge method are chemically functionalized with acid mixture. The functionalization of MWCNTs was confirmed by simple characterization techniques. This revealed that carboxylic group introduced, without disrupting main structure of MWCNTs. The gas sensing performance of the functionalized MWCNTs towards NO2 is studied. The highest sensitivity of 26.88 % for 100 ppm of NO2 at 27°C is observed towards functionalized MWCNTs. Keywords: Carbon nanotubes, Functionalization, Reflux, Response time, Carboxylation

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Abstract: In this work, a composite prepared with a phenolic matrix and reinforced with carbon fibers was subjected to degradation by phenol under subcritical conditions. Phenol was able to solubilize the resin matrix under relatively mild conditions (T ≤ 390 °C, P < 0.5 MPa) without altering the carbon fibers, as confirmed by scanning electron microscopy and by mechanical characterization of the fibers recovered after heat treatment.

Keywords: Carbon fiber, Phenolic resin, Recycling, Subcritical phenol.

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Abstract: The antimicrobial activity of synthesized 6-chloro-2-methyl-1H-carbazole-1,4(9H)-dione and 6-chloro-3-methyl-1H-carbazole-1,4(9H)-dione were studied against Escherichia coli (MTCC 42), Bacillus subtilis (MTCC 121), Staphylococcus aureus (MTCC 96), methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas sp.(MTCC 6199). 6-Chloro-2-methyl-1H-carbazole-1,4(9H)-dione having methyl substituent at C-2 and electron withdrawing chloro group at C-6 exhibited the remarkable antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) with MIC value of 50 μg/mL and against Staphylococcus aureus (MTCC 96) with MIC value of 100 μg/mL. However, 6-chloro-3-methyl-1H-carbazole-1,4(9H)-dione bearing methyl substituent at C-3 with chloro group at C-6 does not exhibited any antimicrobial activity against these pathogenic bacteria.

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Abstract: A new ligand [N-(4-chlorobenzoyl amino) -thioxomethyl] valine (cbv) is synthesized by reaction of 4-chloro benzoyl iso thio cyanate with valine acid. The ligand is Characterized by elemental analysis ,FT-IR, and 13C 1H NMR spectra, some transition metals complex of this ligand were prepared and Characterized by FT-IR , UV-Visible spectra , conductivity measurement's ,magnetic susceptibility , atomic absorption and determination of molar ratio (M:L), from results obtained , the following formula [M(cbv)2] where M+2 =Mn, Fe ,Co , Ni , Cu,Zn,Cd, and Hg and the proposed molecular structure for these complexes as tetrahedral geometry, except copper complex is have square planer geometry .

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Abstract: This research was embarked upon to assess the changes in the physical and chemical properties of piped-borne water supplied in Kano metropolis from the treatment plants(challawa and tamburawa plants), along the distribution lines to the various points of use. Samples of piped water were collected from selected points of use (zones) including raw and treated water from the treatment plants and analyzed for selected physical parameters- pH, alkalinity, conductivity, turbidity, total dissolved solids, total suspended solids and chemical parameters –chlorides, sulphates, nitrates, nitrites and trace metals which includes sodium, potassium.

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Abstract: Levels of concentration of heavy metals (lead, cadmium, arsenic and mercury) and nutrients in rivers Naka and Irigu were determined in the first three months (January, February and March, 2013) and variation downstream compared. Lead and cadmium were determined using Atomic Absorption Spectroscopy (AAS). Hydride generation method was used to determine concentration of arsenic while that of mercury was determined using cold vapour technique.

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