Vol. 7 & Issue 3 ; Section C : Physical Sciences

Date : May 2017 to July 2017

 

Surface Active Properties of Some Bioactive Azole Series Complexes of Copper in Binary Solvent Mixture

Nisha Jain and Neha Mathur

JCBPS; Section C; May 2017 – July, 2017, Vol. 7, No. 3; 401-411.

[DOI: https:/doi.org/10.24214/jcbps.C.7.3.40111]

 

  • Abstract

    The importance of colloidal surfactants containing nitrogen and sulphur donor ligands in applied areas of research and many industrial processes cannot be under estimated. Colloido chemical behavior of complexes derived from copper (II) palmitate with substituted phenylthiourea and substituted 2-amino Benzothiazole in benzene-propanol mixture of varying composition has been investigated by viscometric measurement. The combination is found to posses fungicidal, insecticidal, pesticidal and nematocidal activities. The azole and azine ring compounds are very good pharmacological agents and can be used as antimalarial, antimotion sickness, antihistaminic and analgesic. The combination of copper soap and ligand makes complexes which are highly biodegradable and play important role in biological activities. The interaction of these N donor ligands with metal ion gives complexes of different geometries and literature survey reveals that these complexes are potentially more biologically active. Complexes of copper (II) palmitate with N-donor ligands were synthesized and characterized by their elemental analysis, metal weight, m.pt, IR and NMR spectral studies. Copper soaps due to their surface active properties play a vital role in various fields. Complexes containing copper palmitate show remarkable applications in industries and are used as emulsifiers, foaming and wetting agents and dispersing agents. In the present work benzene and propanol have been chosen as the cosolvent as mixed solvents have tendency to interact with complex molecules and affect the aggregation of complex molecules.

Synthesis and characterization of CuS nanocomposites by using alumina channel-technique

J.Maji  and K.Maji 

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 412-418,

[DOI: https://doi.org/10.24214/jcbps.C.7.3.41218]

 

  • Abstract

    CuS nanocomposites synthesized using Alumina crystallite as the medium. A core shell nanostructure developed by suitable oxidation of the composite. X ray diffraction (XRD) of synthesized CuS nanocomposites revealed the presence of two crystal structures: one is tetragonal and the other is monoclinic. All salient diffraction peaks can be closely matched to the monoclinic and tetragonal structures. The PL spectrum of the CuS nanopartic;les shows a peak centered at 410nm and 460 nm which is shorter than submicron CuS , indicating a CuS nanocrystals obtain in this work in quantum size. Materials exhibited good electrical and optical properties. Due to high dielectric constant and photo luminescence property this CuS nanocomposites can be used in different electronic and optical devices.

A theoretical study of electron transport through a quantum wire (QW) with a side quantum dots (QD’s) array and quantum point contacts (QPCs) and evaluation of conductance as a function of Fermi energy

MD. Faisal Hussain, Davendra Prasad and L. K. Mishra

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 419-430.

[DOI: https://doi.org/10.24214/jcbps.C.7.3.41930]

 

  • Abstract

    Using the theoretical formalism of P. A. Orellana et al. (Phys. Rev B67, 085321 (2003)), we have theoretically evaluated the conductance in the unit of (2e2/h) as a function of Fermi energy in the unit of Γ for N=1 to N=10 QD”s array. Our theoretically evaluated results indicate that as N increases the system develops an oscillating band. One observes N anti-resonances and N-1 resonance which arises due to hybridization of the quasi bound levels of QD’s and the coupling of the QW. This study also reveals an important fact that electron-electron interaction in this system is more effective. The main effect of this interaction is to shift and split the resonance position. Using the theoretical formalism of P. Havu etal [Phys. Rev. B70, 233308(2004)], we have also studied electron transport through QW and quantum point contacts. We observed that conductance of different length of QW as a function of gate voltage increases. This formalism is based on Density Functional Theory and Green’s function technique. Our theoretically evaluated results are in good agreement with the experimental data and also with other theoretical workers. 

Concatenated and CSS quantum codes over ℤ₂

SEDDIK Sanaa

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 431-439.

[DOI: 10.24214/jcbps.C.7.3.43139]

  • Abstract

    The development of methods to effectively maintain the properties of single quantum states during the execution of quantum information processing tasks is one of the biggest challenges for quantum information science. We discuss the concept of generalized concatenated quantum codes. This generalized concatenation method provides a systematic way to build good quantum codes.

A theoretical evaluation of magnetoresitance (magnetotransport property) of some heavy-fermion
superconductors

Rishikesh, P. K. Verma and L. K. Mishra

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 440-451,

[DOI: 10.24214/jcbps.C.7.3.44051]

  • Abstract

    Using the theoretical formalism of Y. Nakajima etal.[arXiv:0804.2624v2[cond-mat.str-el] 18 Apr 2008], we have evaluated magnetoresistance (MR) of CeIrIn5 (TC=0.4K) heavy-fermion superconductor. Our theoretical results indicate that MR displays T-and H dependence that strongly violates the Kohler’s rule. We then examined the validity of the modified Kohler’s rule. We observed that MR well obeys the modified Kohler’s rule indicating a scaling by the Hall angle  tan2 Θ. Using the theoretical formalism of Y. Nakajima etal [9 May, 2003], we have evaluated MR for HF superconductor CeCoIn5 (TC=2.3K). Our theoretical results indicate that MR crosses from negative to positive value. The Hdependence of MR for this SC is different from all other HF-SC’s. The positive MR shows that it is due to cyclotron motion of the electrons whereas the negative MR is due to suppression of spin-flop scattering. Using the theoretical formalism of T. M. Lippman etal[ J.Low. Temp. Phys.(JLTP) (2007)], we have evaluated MR of HF-SC UPt3 (Tc=536mK, TN=5K) along b-axis. The temperature dependence of MR indicates that the resultscan be well described by a polynomial expansion aH+bH2, where a and b are temperature dependent coefficients. The presence of linear term in  MR shows that there is broken inversion symmetry in the system. Our theoretical analysis of MR of these three HF-SC’s indicate that the normal state exhibit a deviation from conventional Fermi-liquid behaviour. It is well described either by non-Fermi liquid behaviour or antiferromagnetic spin fluctuation or AF correlations. Our theoretically evaluated results are in good agreement with other theoretical workers.

The Propagation of Spin Coherent States

SEDDIK Sanaa

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 552-563,

[DOI:10.24214/jcbps.C.7.3.55263]

  • Abstract

    We derive the semi-classical propagation of spin coherent states in complex phase space. We construct a path integral representation for the propagator of such systems and find the appropriate classical trajectories. As special cases we consider two independent systems.

New method for determination of cadmium in Brine water samples via cloud point extraction prior to FAAS using modifying agents

Nadhum A.N. Awaad and Bassam A. R. AL Abdul Aziz

JCBPS; Section D; May 2017 – July, 2017, Vol. 7, No. 3; 578-587.

[DOI: 10.24214/jcbps.D.7.3.57887]

  • Abstract

    Cloud point extraction (CPE) was developed for the separation and pre concentration of trace amounts of cadmium. Flame atomic absorption spectrometry (FAAS) is combined with (CPE) for determine trace amounts of cadmium in brine water. The method is depended on the formation of the hydrophobic complex between Cd ions and sodium diethyldithiocarbamate (DDTC) followed by its extraction into a Triton X-114 using surfactant. The parameters such as pH of sample, concentrations of DDTC and Triton X-114, equilibrium temperature, and equilibrium time, which affect both complexation and extraction, are optimized. Under the selected optimum conditions, and use of magnesium nitrate as matrix modifying agents enable us to develop the direct method for determination cadmium in brine water. The accuracy of the method was better than (3.494) % while the detection limit was found to be (0.841 μg/l) for preconcentration of 1 ml of sample for the determination of Cadmium ions is obtained.

A Theoretical Evaluation of Magneto-Transport Properties like Electrical Resistivity, Hall Resistivity,
Hall Coefficient and Hall Angle of Some Heavy- Fermion Superconductors

Rishikesh , P.K. Verma  and L.K. Mishra 

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 564-580.

[DOI: 10.24214/jcbps.C.7.3.56480]

  • Abstract

    In this paper, we have theoretically evaluated magneto-transport properties like temperature ependent electrical resistivity ρxx , temperature dependent Hall resistivityρ xy , temperature dependent Hall coefficient RH and Hall angle ΘH for some heavy-fermion superconductors. The evaluation is performed by taking the theoretical formalism of Y. Nakajima et al [arXiv:cond-mat/0607527v1[cond-mat.str-el] 31 July 2006], Y. Nakajima et al[arxiv:0804.2624v2] [cond-mat.str-el] 18 Apr 2008] and T. Muramatisc et al [J. Phys. Soc. Jpn., Vol 70, 3362 (2001)]. Our theoretically evaluated results of magneto-transport properties of HF SC show non-Fermi liquid behaviour below TCoh (TCoh corresponds to Fermi temperature of f-electrons). This non-Fermi liquid behaviour includes T-dependence of resistivity, large enhancement of Hall coefficient at low T and Hall angle cotΘH  varies with T2. Our theoretically evaluated results are in good agreement with other theoretical workers. We observed that these magnetotransport anomalies are common feature of HF SC CeIrIn5, CeCoIn5, CeRhIn5 and high TC-cup rates. We also observed that these are the universal feature of strongly correlated electron system in the presence of strong AF fluctuations. Our studies will be quite useful for the understanding of heavy fermion systems with high TC cup rates.

Plane Symmetric Anisotropic String Cosmological Model with Electromagnetic Field in General Relativity

Barkha Rani Tripathi, Atul Tyagi and Swati Parikh,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 581-589.

[DOI:10.24214/jcbps.C.7.3.58189.]

  • Abstract

    In the present paper, plane symmetric anisotropic string cosmological model in the presence of electromagnetic field is investigated. The metric potentials are functions of x and t both. We have assumed that F12 is the only non-vanishing component of electromagnetic field tensor Fij. To get the deterministic solution, it has been assumed that the expansion (θ) in the model is proportional to the eigen value σ11 of the shear tensor σ ij . It is observed that the model has a Barrel type singularity. Some physical and geometrical properties of the model are also discussed

Volumetric and acoustical study of ammonium ceric (IV) sulphate in aqueous medium at T=(283.15,293.15,303.15 and 313.15)K

Monalisa Das,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 590-599,

[DOI: 10.24214/jcbps.C.7.3.59099]

  • Abstract

    The measurement of density and ultrasonic velocity have been carried out for aqueous solution of cerric ammonium cerric(IV) sulphate over molality range 1.97x10-3 m to 7.98x10-3 m at T= (283.15, 293.15, 303.15 and 313.15) K at atmospheric pressure. The data are used for the determination of volumetric parameters such as apparent molar volume VΦ , partial molar volume V , solute-solute interaction parameter Sv and acoustical parameters such as adiabatic compressibility (β) , acoustic impedance (Z)  intermolecular free length (Lf) , relative association (RA) and hydration number   nH .The results are interpreted in terms of hydrophilic interaction of the compound and correlated to study the effect of temperature on different types of interactions present in the solution.

Radiation Effect on Unsteady MHD Free Convective Heat and Mass Transfer Flow with Variable Temperature and Concentration

C. Madhava Reddy,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 600-614.

[DOI: 10.24214/jcbps.C.7.3.60014]

  • Abstract

    A theoretical study has been performed on diffusion thermo and thermo diffusion effects on unsteady MHD natural convection heat and mass transfer flow past an accelerated vertical plate in the presence of thermal radiation, variable temperature and also variable concentration. The non-dimensional governing equations are solved numerically by using finite difference scheme. The effects of different physical parameters on velocity, temperature and concentration are presented and discussed with the help of graphs. Also the numerical values for local skin friction, Nusselt number and Sherwood number are recorded and analyzed. Increasing values of Soret number results in rising of the concentration, but it falls down under the influence of Dufour number and Schmidt number. Skin friction decreases for increasing values of both Soret and Dufour numbers.

Thermo-acoustic investigations on L-Valine in aqueous salt

V.A. Giratkar, R.B.Lanjewar, S.M.Gadegone, K.C.Patil,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 615-630.

[DOI: 10.24214/jcbps.C.7.3.61530.]

  • Abstract

    The ultrasonic velocity (u), density (ρ) and viscosity (η) of an amino acid L-Valine of various concentrations in 2% of NaCl solutions have been measured. From these experimentally measured parameters thermodynamic parameters such as adiabatic compressibility (βa), intermolecular free length (Lf), acoustic impedance (Z), internal pressure (πi), relaxation time (τ), Gibb’s free energy (ΔG), free volume (Vf), Vander Waa’ls constant (b), Rao’s constant (R), Wada’s constant (W), molecular radius (ro) absorption coefficient (a/f2), relaxation strength (r), available volume (Va), volume expansivity (α), reduced volume (Ṽ) and enthalpy (ΔH) were calculated. It was found that there is certain degree of variation in these parameters with change in concentration and temperature. The variations of acoustic parameters with concentration and temperature indicate the existence of intermolecular interaction in the present systems

Multi-Symplectic Integrator for Complex Nonlinear System

Ram Dayal Pankaj Arun Kumar and  Bhawani Singh,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 631-637.

[DOI: 10.24214/jcbps.C.7.3.63137]

  • Abstract

    Numerical study for the complex nonlinear system (coupled higgs equations) is considered as a Model for Nonlinear Wave’s Interaction. A finite difference scheme is derived for the model equations. A new six point scheme, which is equivalent to the multi-symplectic integrator, is derived. The numerical simulation is also presented for the model equations.

Impact of Temperature on the Properties of Mixed Compound of Magnesium Titanate and Zinc Oxide

Sumit Ruhela1and S.K. Srivastava2

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 638-644.

[DOI: 10.24214/jcbps.C.7.3.63844]

  • Abstract

    A study has been made to explore the behavior of photo dielectric effect in the compound of magnesium titanate and zinc oxide. The heat treatment method is used to prepare the mixed composite. The composite is prepared by heating the mixture (ZnO and MgTiO3) at temperature 6500 – 9500C in a cylindrical furnace for 45 – 55 minutes. The sensitive material is sandwiched in between the parallel plate capacitor. The variation of conductance (G), capacitance (C) and loss factor (tanδ) with different temperature is observed.

A Theoretical Study of Electrodynamics of High TC Superconductor and Evaluation of OpticalConductivity as a Function of Frequency

Santhosh Kumar  and L.K. Mishra

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 645-660,

[DOI: 10.24214/jcbps.C.7.3.64560]

  • Abstract

    Using theoretical formalism of D.N. Basov and T. Timusk, we have studied the electrodynamics of high TC superconductors. We have evaluated CuO2 plane conductivity a σa(ω) for various temperatures in both normal and superconducting states of Y-123 superconductor. Our theoretically evaluated results indicate that Cu-O chain is accompanied by a narrow Drude peaks. From under doped to over doped samples there is continuous increase of the low energy (Drude peaks) contributions to the conductivity. Our theoretical obtained results of optical conductivity σ(ω) for different doping and at different temperatures reveal that contributions to optical conductivity come from electronic contribution and optical phonon contribution. The phonons are dominant at room temperature where electronic contribution is not anomalous. The pseudo gap produces a strong depression in the c-axis conductivity. Below 300K, a gap like depression occurs to the σ(ω) for under doped crystal. At T>T* (pseudo gap T=300K) the electronic conductivity is nearly frequency independent signalling incoherence c-axis response. We have also calculated optical conductivity Re σ(ω) and frequency .dependent scattering rate τ(ω)-1 / 2πc of superconductor BiSr2Ca0.92Y0.08Cu2O8+ δ [TC=96K] at different temperatures. Our theoretical results indicate that Re σ(ω) decrease with ω and τ(ω)-1 / 2πc increase with ω for all temperatures taken. Such behaviour is expected due to quantum criticality of cuprate superconductors. Our theoretically evaluated results are in good agreement with other theoretical workers. It is our firm belief that the studies of optical conductivity, pseudo gap behaviour and quantum criticality will be quite helpful in formulating a good and reliable theory of high TC superconductor.

Physicochemical investigations on L-Serine in aqueous salt at different temperature range T= (288.15 to 303.15) K

V.A. Giratkar, R.B.Lanjewar, S.M.Gadegone, K.C.Patil

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 661-676,

[DOI: 10.24214/jcbps.C.7.3.66176]

  • Abstract

    Densities, viscosities and ultrasonic velocities of an amino acid L-Serine at four different temperatures 288.15, 293.15, 298.15 and 303.15K for various concentrations (0.02 to 0.12) mol dm−3 in 2% of aqueous electrolytic solution have been measured. These measurements have been used to evaluate some important thermo-acoustic parameters such as adiabatic compressibility (βa), intermolecular free length (Lf), acoustic impedance (Z), internal pressure (πi), relaxation time (τ), Gibb’s free energy (ΔG), free volume (Vf), Vander Waal’s constant (b), Rao’s constant (R), Wada’s constant (W), molecular radius (ro) absorption coefficient (a/f2), relaxation strength (r), available volume (Va), volume expansivity (α), reduced volume (Ṽ) and enthalpy (ΔH). The results are interpreted in terms of molecular interactions between the components of the mixture.

Comparative Study on shielding behavior of different wood materials for Gamma rays at different energy levels

B.Saritha and A.S.Nageshwara Rao

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 677-686.

[DOI: 10.24214/jcbps.C.7.3.67786]

  • Abstract

    This paper presents evaluation of total mass attenuation coefficients (μ/ρ) for two wood materials [Pterocarpus Santalum (Sandal) and Azadirachta indica (Neem)] collected from Telangana and Andhra Pradesh region of india. The values of mass attenuation coefficients are calculate using Sodium iodide Thallium NaI (Tl) Scintillation detector coupled with 8K multi-channel analyzer (MCA) with narrow beam geometry arrangement. The experimental values are compared with the values from X-com data base program with Am241at 59.5KeV and Cs137 at 661.6 KeV radioactive Isotopes. A comparison with the results for similar energy ranging from 10KeV to 1000 KeV found in the literature showed good agreement. The study reveals that the wood samples under investigation are more effective than ordinary shielding materials.

A Theoretical Evaluation of Electronic Conductance in Quantum Wire by Three Quantum Dot Arrays and Study of Transition from Zero Transition to Quantization of High Magnetic Field for QPC (Quantum Point Contacts)

MD. Faisal Hussain , Davendra Prasad  and L.K. Mishra,

JCBPS; Section C; May 2017 – July 2017, Vol. 7, No. 3; 687-699.

[DOI: 10.24214/jcbps.C.7.3.68799]

  • Abstract

    Using theoretical formalism of Azari et al, we have theoretically evaluated dimensionless electron conductance g = [G(ε) ] 2e2 / h as a function of Fermi energy ε/μ (in the unit of μ ) of a non-interacting QD arrays side coupled to QW. Our theoretical results indicate that when the number of chain increases the width of the anti-resonant increases. The number of anti-resonant exactly depend on the number of QD in every chain. In case of QW with three attached QD’s our results show that conductance have two resonant and three anti-resonant. Using the theoretical formalism of B.J. Van Wees et al, we have studied the transition from zero magnetic field quantization to quantization in the high magnetic field in quantum point contacts (QPC). Our theoretical results show that small magnetic field improves the quantization. This mechanism indicates that backscattering in the QPC is reduced in the presence of magnetic field. This work will be quite helpful in the study of electron conductance in the case of quantum Hall effect. Our theoretical investigation of QW attached to QD arrays will be used in the design of new resonant-tunnelling (RT) electronic device. Our theoretically evaluated results are in good agreement with other theoretical workers

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