Scientific Research Publishing

Read  full  paper  at: http://file.scirp.org/Html/20513.html Author(s)    G. Kanchana , P. Sundaramoorthi , R. Santhi , S. Kalainathan , G.P. Jeyanthi Affiliation(s) Department of Bio-Chemistry, Avinasliilingam University, Coimbatore, India. . Department of physics, Aringar Anna Government Arts and Science College,Namakkal. . Department of Physics, MEC, Mallasamudram (W), Namakkal, India. . Department of physics, VIT, Vellore, India . Department of Bio-Chemistry, Avinasliilingam University, Coimbatore, India. . ABSTRACT Kidney stone consist of various organic, inorganic and semi organic compounds. Mineral oxalate monohydrate and di-hydrate is the main inorganic constituent of kidney stones. However, the mechanisms for the formation of calcium oxalate kidney stone are not clearly understood. In this field of study there are several hypothesis including nucleation, crystal growth and or aggregation of formation of COMH, AOMH (Ammonium ...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53197#.VLciWcnQrzE Author(s)    Jiangyan Meng , Yunying Wang Affiliation(s) Key Laboratory of Nondestructive Testing, Nanchang Hangkong University, Ministry of Education, Nanchang, China . ABSTRACT YB-2 aviation polymethyl methacrylate (PMMA) is irradiated in a xenon arc lamp weather resistance test chamber for 1620 hours. The tensile strength, light transmittance, surface morphology, relative molecular mass, infrared absorption spectrum and glass transition temperature (Tg) of PMMA exposed in xenon arc lamp for different durations are tested and characterized by universal testing machine, optical haze instrument, scanning electronic microscopy (SEM), gel permeation chromatograph (GPC), fourier transform infrared spectrometer (FT-IR) and differential scanning calorimetry (DSC), so as to comprehensively analyze the influence of xenon arc lamp irradiati...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53121#.VLXOVsnQrzE Author(s)    Shahbaz Ahmad , Shazia Bashir , Daniel Yousaf , Nisar Ali , Tousif Hussain Affiliation(s) Center for Advanced Studies in Physics, Government College University, Lahore, Pakistan . ABSTRACT Brass targets were irradiated with various laser pulses of Excimer laser ranging from 1200 to 3000 for constant fluence of 3.4 J/cm 2 in oxygen atmosphere (100 Torr). The surface morphology and crystallographic analyses were performed by using Scanning Electron Microscope (SEM) and X-Ray Diffractometer (XRD). SEM analysis reveals the formation of laser-induced micro-sized cavities, bumps, cones and wave-like ridges with non-uniform shape and density distribution. These features are formed for all number of pulses; however with increasing number of pulses from 1200 to 2400, the density of cavities decreases whereas, the wave-like ridg...