IOSR-JAP   Volume-10 ~ Issue-4 ~ July-August 2018

ABSTRACT: The spread of multidrug-resistant strains (MDR) pose serious threats to the environment and public health. Inappropriate use and indiscriminate release of antibiotics in the environment through un-metabolized form create a scenario for the emergence of virulent pathogens and MDR bugs in the surroundings. Eco-friendly synthesis of silver nanoparticles (Ag-NPs) prepared by Sargassum wightii (SW) were evaluated for antibacterial efficacies against Gram-positive and negative MDRs. SWAg-NPs phase purity, particle size/ morphology and composition were determined by UV-vis spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscope, energy dispersive........

Key Words: Green nanoparticles; Multidrug-resistant strains; Sargassum wightii; Antibacterial efficacies

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[3]. Rai M K, Deshmukh S D, Ingle A P & Gade A K, J Applied Microb,112 (2011) 841–852.
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[5]. Martinez J L, Science, 321 (2008) 365–367.

ABSTRACT: The activity concentrations of natural radionuclides in soil and plant were measured in this study with an aim to determine the activity concentrations and transfer factors of radionuclides such as 226Ra, 238U, 232Th and 40K from soil to plant collected from north eastern Libya. The samples were collected from different locations in north eastern Libya. The activity concentrations of radionuclides in soil and plant samples were recorded for 226Ra at range (43 -94.10) Bq.kg-1 and (46 -159.01) Bq.kg-1 respectively, 238U at range (35.37 -83.40) Bq.kg-1 and (41.32 -144.08) Bq.kg-1 respectively, 232Th at range (39.37 -59.35) Bq.kg-1 and (78.40 -166.11) Bq.kg-1 respectively, and for 40K at range (384.80 -561.28) Bq.kg-1 and (600.21 -1344.90) Bq.kg-1 respectively. The transfer factor (TF) was measured........

Keywords: Activity concentration, HPGe detector, Transfer factor

[1]. F. Vera Tome, M. P. Blanco Rodríguez and J. C. Lozano, "Soil-to-Plant Transfer Factors for Natural Radionuclides and Stable Elements in a Mediterranean Area" Journal of Environmental Radioactivity, Vol. 65, 2003, pp. 161-175. http://dx.doi.org/10.1016/S0265-931X(02)00094-2.
[2]. S. Golmakani, V. M. ahabi Moghaddam and T. Hosseini, "Factors Affecting the Transfer of Radionuclides from the Environment to Plants," Radiation Protection Dosimetry, Vol. 130, No. 3, 2008, pp. 1-8.
[3]. A. Abbady, "Level of Natural Radionuclides in Foods-tuffs and Resultant Annual Ingestion Radiation Dose,"Nuclear Science and Techniques, Vo1. 17, No. 5, 2006, pp. 297-300.
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[5]. IAEA (1987) Preparation and certification of IAEA gamma spectrometry reference materials, RGU-1, RGTh-1 and RGK-1. Report-IAEA/RL/148. International Atomic Energy Agency...

ABSTRACT: Fluorescence spectroscopy has assumed a major role in analysis, particularly in the determination of trace contaminants is our environment, industries and bodies, because for applicable compounds fluorescence gives high sensitivity and high specificity. In this present work the quenching experiment was done in two different solvents, Diethyl ether and Methanol. Phenolphthalein is taken as the quencher. The fluorescers used for the quenching experiments are some substituted amines [Ethylamine, Diethylamine, Diethylene triamine]. Experimental solutions were prepared by adding fixed aliquot of stock solution of fluorescer to 5 ml of the solvent, so that concentration of resulting solution is about 10-5 M. Quencher solutions were added to these solutions. The........

Keywords: Fluorescence, amines, Phenolphthalein, quenching

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ABSTRACT:Cytotoxicity or cell viability of AgNPs have been prepared by silver nitrate by using the extract of Cassia auriculata leaves. The formation of dimensional structure of spherical nanoparticles with the addition of leaves extract prepared by using the 1Molar solution is prepared by using the reflux method. The crystal size of the Ag NPs was calculated and it is nearly 61 nm. When the Cassia auriculata leaves extract, it is used as reducing agent of Ag NPs and the morphology of Ag NPs have studied by using scanning electron microscopy and Transmission electron microscopy after calcinations at 350 °C. The anticancer activities of Cassia auriculata was studied for MCF7 cell line and was reported..

Keywords: Cassia auriculata, Ag NPs, MCF7 Cell line and Reflux method

[1]. Singh, M., Singh, S., Prasad, S. and Gambhir, I.S., Nanotechnology in medicine and antibacterial effect of silver nanoparticles. Digest Journal of Nanomaterials and Biostructures, 2008, 3(3), 115-122.

[2]. Sharma A, Tyagi VV, Chen CR, Buddhi D. Review on thermal energy storage with phase change materials and applications. Renewable and Sustainable energy reviews. 2009, 1;13(2):318-45.

[3]. De Jong, W.H. and Borm, P.J., Drug delivery and nanoparticles: applications and hazards. International journal of nanomedicine, 2008, 3(2), 133.

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[5]. Singh, S.K., Clarke, I.D., Terasaki, M., Bonn, V.E., Hawkins, C., Squire, J. and Dirks, P.B., Identification of a cancer stem cell in human brain tumors. Cancer research, 2003,63(18), 5821-5828.

ABSTRACT: Cobalt doped cupric oxide (CuO) thin films have been deposited onto glass substrate using a spray Pyrolysis technique at different doping concentration. X-ray diffraction patterns for pure and Co doped CuO thin films have monoclinic crystal structure without any extra peaks. The lattice parameters of films increase with increasing Co doping indicating Co substituting in CuO samples. The average crystallite size was determined by Scherrer's formula and found that crystallite size of the films in the range of 6 to 8 nm. The volume of unit cell of thin films increases with increasing Ni doping. The dislocation densities of the prepared films were reduction with increasing Co doping.

Keywords: CuO; doping; spray pyrolysis; thin films; strain

[1]. F. Bayansal, B. S¸ahin, M. Yu¨ ksel, and H.A. C etinkara: Mater. Lett., vol. 98, (2013) pp. 197–200.
[2]. Y. Gu¨ len, F. Bayansal, B. S¸ahin, H.A. C etinkara, and H.S. Gu¨ der: Ceram. Int., vol. 39, (2013) pp. 6475–80.
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ABSTRACT: Frequency and temperature dependences of electric modulus of pure Polypyrrole and Polypyrrole doped with CuZnFe2O4 nanoparticles were investigated using ac impedance spectroscopy in the frequency range 100 to 5MHz, at temperatures 30 ̊ C, 100 ̊ C ,150 ̊ C and 200 ̊ C. In addition, the real (M') and imaginary (M'') components of the electrical modulus were calculated from the values of ε' and ε''. Using the electric modulus formalism It has been found that the Cole – Cole equation of dielectric relaxation expressed in the electric modulus form is capable of quantitatively describing the experimental data from which we extract the relaxation time and a parameter which gauges the broadening of the loss spectrum.

[1]. DR Paul, LM Robeson, Polymer, Vol. 49 , 3187-3204, (2008),
[2]. Jianjun Liu, Chun-Gang Duan, Wei-Guo Yin, W. N. Mei, R. W. Smith, and John R. Smith , Journal of Chemical Physics, volume
119, number 5 1, 2812 – 2819. (2013)
[3]. Ritu P. Mahare, Devendra K. Burghate, Subhash B. Kondawar, Adv.Mat.Lett., Vol..5(7) 400-405. (2014)
[4]. Anuj Jain,1 Ravi Kant Baranwal,1 Ajaya Bharti,1 Z. Vakil,1 and C. S. Prajapati2 , The Scientific World Journal , Volume 2013,
Article ID 790359, 7 pages, (2013)
[5]. V.S. Shanthala, S.N. Shobha Devi, M. V. Murugendrappa, IOSR Journal of Applied Physics (IOSR-JAP) , Volume 8, Issue 5 Ver.
II, 83-90. (2016),..

ABSTRACT: Cu-doped Zinc oxide was successfully synthesized by solid-state reaction method. Five compositions of Zn1-xCuxO with x= 0.01, 0.03, 0.10, 0.20 and 0.30 were prepared at calcination & sintering temperature 500◦C using the starting materials Zn(CH3OO)2 and Cu(CH3OO)2. In this paper the structural property has been characterized using powder X-ray diffraction (XRD). To study structural property it has been used two composition of Zn1-xCuxO with x= 0.01, & 0.10 (Zn0.99Cu0.01O & Zn0.90Cu0.10O). In this case, in order to getting homogeneous and fine sample powder, it has been used mortar & pestle to grind and muffle furnace for annealing. Repeating the process until the homogeneous powder sample is prepared. From the XRD analysis it is found that the prepared samples...........

Keywords: ZnO, Cu-doped, Solid-state reaction, structural property, single phase

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ABSTRACT: The physical properties of milk components affect the functional properties and quality attributes of foods in which they are used. Hence, knowledge of the basic physical properties of milk components is critical in determining the usefulness of milk components in food formulations and in determining quality attributes and acceptability of foods containing these components,we studyphysical properties ofraw milk of sheep, goat ,cow and camel inAlguzera FarmsSudan,Milk samples were collected from farm,and analyzed for their physical features, including,colour,viscosity, surface tension ,density,refractive index ,freezing point,and boiling point,were compared with the physic characteristics of the fresh natural milk samples from camel, cow,sheep and goat.Therefore, these elements were.......

Keywords: Milk, Physical properties, Alguzera,density,viscosity

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ABSTRACT: The total energy of an element is the basic energy value from which other properties of the element can be calculated. Aluminum Arsenide (AlAs) and Indium Arsenide (InAs) are III – Arsenic binary semiconductors with indirect and direct energy band gap respectively. The total energy of each of them was calculated using the Projector Augmented Wave (PAW) method with the PBE-GGA for the exchange-correlation functional. The total energy were calculated and from the results gotten, the lattice constants were found to be 5.722Ǻ and 6.176Ǻ, the bulk modulus are 68.8 GPa and 50.5GPa respectively while the pressure derivative of the bulk modulus are 4.24 and 4.61 respectively, also the unit cell volumes were gotten as 316.100a.u3 and 397.445a.u3. The computed values are in close agreement with experimental values and that from other methods.

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ABSTRACT: The discovery of gravitational waves and its theoretical connection with quantum gravity leads to the idea of M-theory realization of topological solitons in the framework of Type I string theory. Using K-theory for SO(n) and Sp(n) Type I string theory it was possible to calculate the Ramon-Ramon charges of D-branesolitonic objects for extra dimensional space, that signalize about the presence of gauge fields of excited graviton type in the bulk.

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ABSTRACT: A series of superconducting composite (100-x) YBa2Cu3O7- δ+ x Ni metal (x = 0, 2.5, 5, 10 and 15 wt.%) was prepared using conventional solid state reaction route. The attenuation coefficient (α) of the ultrasonic longitudinal waves at frequency 4MHz was measured for these samples in the temperature range 60-120 K. The results showed the clear effect of Ni2+-presence in CuO2 plane on anti-ferromagnetic (AF) correlations. Increasing Ni2+ ions in CuO2 plane decreases the height of an attenuation peak (P1) in the vicinity of the superconducting transition temperature TC. Decreases of both P1 and TC with Ni wt.% were found to have similar trends suggesting that the relaxation species of P1 may be correlated with superconductivity......

Keywords: Superconducting composite, ultrasonic attenuation, relaxation process, anti-ferromagnetic (AF) correlations, Y123, Ni.

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