Value of Understanding and Accepting for the Students of Professional Studies

The art of effective teaching is the information should reach the students in proper way. And it interest to the students. The need of these two to assess the value of understanding and accepting between teachers and students, know the importance of teachers–students interactions within the learning environment. And to know the importance of a teacher for the student’s success in their career. The way of selections are based on interactiveness, ice breakers, communications and link experience. Here, the modes of catagories of students divided like excellent, good, fair and poor and the analysis are interpreted and discussed. Key words: Value; Understanding; Accepting; Evaluation technique; Teaching Practic

Ultrasonic investigation on aqueous polysaccharide (starch) at 298.15 K

AbstractThe ultrasonic velocity, density and viscosity at 298.15K have been measured in the binary system of starch in aqueous medium. The acoustical parameters such as adiabatic compressibility (β), free length (Lf), free volume (Vf), internal pressure (πi), acoustical impedance (Z), relative association (RA), Rao’s constant (R), Wada’s constant (W), classical absorption coefficients (α/f2), relaxation time (τ) and relaxation strength (r) are calculated. The results are interpreted in terms of molecular interaction between the components of the mixtures

Study of CoFe2O4 particles synthesized with various concentrations of PVP polymer

CoFe2O4 particles were synthesized using metallic nitrates and polyvinylpyrolidone (PVP) using sol-gel method followed by calcination for 2 h at 960 C. PVP performed as a surfactant and the effect of various concentrations of PVP on the resultant CoFe2O4 powder was studied. The resultant samples were characterized by XRD, TG/DSC, HR-SEM and VSM. X-ray diffraction results indicated the crystalline phase of CoFe2O4 particles and impurity phase of hematite was observed for higher PVP concentrations. SEM images demonstrated the influence of PVP concentration on the size of the particles. By VSM measurements, the variations in magnetic properties with respect to PVP concentration are studied. All the magnetic characteristics H c, M s and M r increased for 6 wt% and 15 wt% of PVP concentration. The CoFe 2O4 particles synthesized with the optimum concentration of PVP may be very attractive for potential applications because of their outstanding magnetic properties (M s =81.1 Am2/kg, H c =831 Gauss)

Study of CoFe2O4 particles synthesized with various concentrations of PVP polymer

CoFe2O4 particles were synthesized using metallic nitrates and polyvinylpyrolidone (PVP) using sol-gel method followed by calcination for 2 h at 960 C. PVP performed as a surfactant and the effect of various concentrations of PVP on the resultant CoFe2O4 powder was studied. The resultant samples were characterized by XRD, TG/DSC, HR-SEM and VSM. X-ray diffraction results indicated the crystalline phase of CoFe2O4 particles and impurity phase of hematite was observed for higher PVP concentrations. SEM images demonstrated the influence of PVP concentration on the size of the particles. By VSM measurements, the variations in magnetic properties with respect to PVP concentration are studied. All the magnetic characteristics H c, M s and M r increased for 6 wt% and 15 wt% of PVP concentration. The CoFe 2O4 particles synthesized with the optimum concentration of PVP may be very attractive for potential applications because of their outstanding magnetic properties (M s =81.1 Am2/kg, H c =831 Gauss)

Synthesis, characterization and effects of citric acid and PVA on magnetic properties of CoFe2O4

Cobalt ferrite (CoFe2O4) particles were synthesized by sol-gel method using metal nitrates, citric acid (CA) and polyvinyl alcohol (PVA). X-ray diffraction (XRD), high resolution scanning electron microscopy (HR-SEM), thermogravimetry/differential scanning calorimetry analysis and vibrating sample magnetometer were used to study the structural, thermal and magnetic properties of the CoFe2O4 powder. XRD results indicate that the resultant particles have crystalline, pure single phase spinel structure. From HR-SEM images, a systematic decrease in particle size is observed with an increase in PVA concentration, along with addition of CA. CA at various concentrations of PVA significantly enhance the magnetic properties of the materials

Physico-chemical analysis in ternary organic mixtures at various temperatures with an acoustical approach

Thermo-dynamical analyses of organic mixtures are essential across industries. Ultrasonic sound velocity (U) measurements in the ternary organic mixtures of Toluene, Chloroform, and Cyclohexane have been conducted between 303.15, 308.15 and 313.15 K. The experimental/derived data were utilised to compute deviations for their excess values such as adiabatic compressibility (βE), free length (LfE), free volume (VfE), impedance (ZE), internal pressure (πiE) and enthalpy (HE) to investigate and confirm the types of interactions. Using these derived parameters, excess parameters were calculated to further reaffirm the type, strength, magnitude, and potential interactions such as complex formation, dipole-dipole, and dispersive types. Moreover, both ideal and nonideal behaviours were analysed. The ultrasonic velocity data were validated against some contemporary and well-known models like Namoto’s relation (NR), Ideal mixture relation (IMR), Impedance dependence relation (IDR), Collision factor theory (CFT) and Nutch-Kunkies (NK) theorem. From the IMR and IDR are gives well approach to experimental one. And a comparative study of these models was conducted to ascertain the possible types of interactions within the mixtures through their molecular interaction parameter, percentage deviation, standard percentage error deviation

Development of a high rate biological system (Anammox + phosporous) for the treatment of low strength wastewaters

Since their detection and abundance are disrupted by a number of unidentified conditions, anaerobic ammonium oxidising bacteria (anammox) play a vital role in wastewater. Low Strength Wastewaters (LSW) are those that have a chemical oxygen demand (COD) < 1000 ppm. Nitrogen and phosphorus are the major nutrients present in LSW in addition to the organic carbon. The biological nitrogen removal was studied through using a recent process of anaerobic ammonium oxidation (Anammox) process. A thorough explanation of the anammox substrate removal mechanism and denitrification phosphorus removal is provided. Denitrification was studied in a high rate anoxic hybrid reactor (HR) which yielded NO3−-N removal in the range of 92–100% till a Hydraulic Retention Time (HRT) of 0.3 d and 79% at 0.24 d respectively for an inlet NO3−-N concentration of 500 ppm. Total kjedahl nitrogen (TKN) removal of 91%, 77%, 69% and 61% were obtained in the HR containing anammox and denitrifying granules at a HRT of 2.14, 0.94, 0.56 and 0.4 per day respectively for an inlet TKN concentration of 500 ppm. Phosphorus removal of 100, 83 and 72% was obtained for an inlet PO43−- P concentration of 50, 75 and 100 ppm, respectively at an optimum anaerobic HRT of 0.06 d (1.5 h) and aerobic HRT of 0.94 d. It is evident that the phosphorus removal efficiency is better in continuous mode than in the batch mode

Development of mixed anaerobic culture for degrading high concentrations of chlorophenols

This study details the development of mixed anaerobic culture capable of degrading high concentrations of chlorophenols; 4-chlorophenol (MCP), 2,4-dichlorophenol (DCP) and pentachlorophenol (PCP) were used for that purpose. The role of glucose concentration and the relative potential of mixed culture for acclimatization of different chlorophenols under anaerobic conditions were studied. Methane production, pH and their reduction in concentrations of glucose and chlorophenols were measured at regular intervals. It was observed that after 350 days of acclimatization, anaerobic cultures degraded up to 200 ppm MCP, 200 ppm DCP and 250 ppm PCP. It was also found that the biogenic substrate such as glucose increased the rate of chlorophenols acclimatization and degradation

Study of Structural and Optical Properties of Fe2+ Doped Tin Oxide Nanoparticles

Tin dioxide nanoparticles (SnO2) were synthesized by a sol-gel method. And tin tetra chloride (SnCl4) and ammonium hydroxide (NH4OH) were used as the precursor. NH4OH maintain the homogeneity and stoichiometry of solution through pH. The obtained powder subjected to calcination about 110oC. The obtained samples are characterized by X-ray diffraction, Scanning electron microscope, Fourier transform infrared spectroscope and UV-Visible spectroscopy. From the characterizations it is confirmed that the tetragonal structure and the particles are small and nanosizes, The O-H stretching and C=C bending stretching with chemical compositions are analyzed. The improved conduction properties through lower bandgap and the results are further interpreted and discussed