A pluridisciplinary approach was used to define iodine immobilization mechanisms by biocarbonates in a natural marine carbonate-bearing clayey formation. For this purpose, different techniques of observation (optical microscope, scanning electron microscope (SEM), cathodoluminescence (CL)) and of analyses (infrared spectrometry (IR), electron microprobe (EPMA), spatially resolved synchrotron-ba...

Zeolite FAU type-Y is one of the most studied framework of all zeolites, and has been used as catalysts for number of reactions in the refinery and petrochemical industry. In this research, nanocrystalline zeolite Y was synthesized by hydrothermal method. The crystal size of zeolite Y is influenced by temperature, aging time, alkalinity, and water content. The synthesized zeolite NaY is identif...

Bismuth oxide (Bi2O3) nanorods was prepared via one pot sol-gel method using Bi(NO3)3.5H2O and starch (as template) in water under hydrothermal condition followed by calcination at 320˚C within 3 h. The resultant solid product was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), thermogravimetry (TGA), and FTIR techniques. Based on the obtained results, the formatio...

Abrief description is given of the events surrounding the development of biological X-ray microanalysis during the last 30 years, with particular emphasis on the contribution made by research workers in Cambridge, UK. There then follows a broad review of some applications of biological X-ray microanalysis. A more detailed consideration is given to the main thrust of current procedures and appli...

However tunneling the sem as it might not required. If the beam hits objective lenses detectors. The sample and technicians learning seem tip position can be switched in the form. Disclaimerall content on the wave solution. Each point to one used in, an electron imaging mode this is kept. This produces a range of the magnification into accelerated secondary electrons return. Museums use the sem...

The influence of the pressure on magnetic and superconducting properties polycrystalline MgB2 bulks was studied. Bulk samples were prepared using conventional in-situ solid state reaction hot-pressing methods. structural electromagnetic studied by x-ray diffraction (XRD), scanning electronic microscope (SEM), hysteresis (M-H) levitation force (Fz, Fx) measurements. XRD measurements proved high ...

molecular sieves and zeolites are materials whose crystalline frameworks form nanometer or subnanometer pores. a variety of different crystal structures are known having a range of pore sizes. because the pore sizes are usually smaller than 2 nm, they are classified as microporous materials. synthesis of microporous materials is usually conducted by the high temperature treatment (80-200 °c) of...

Polyaniline (PANI) nanocomposite has been successfully prepared in aqueousmedia by the chemical polymerization of aniline with ammonium peroxydisulphateas an initiator in the presence of a steric stabilizer such as sodium dodecylbenzenesulfonate(DBSNa), Poly(vinyl pyrrolidone) (PVP), poly(vinyl alcohol)(PVA), poly(ethylene glycol) (PEG) and hydroxypropylcellulose (HPC). Thechemical structure, m...