Spectroscopy

Over the last decade, medical imaging has acquired the use of optical methods and devices. Instruments based upon the use of light have been of great interest to account for the significant need of having a noninvasive, safe and continuous way of examining many parameters, and in particular the oxygenation of living tissue. These devices may be used clinically for intensive care patients or routinely by doctors or nurses for general check up purposes. This project involves the research, design, development

The formation of nanocrystalline ZnO films was confirmed by using X-ray diffraction. XRD patterns of simple glass substrate and ZnO coated glass substrates were shown in figure 3(a) and (b-d), respectively. The amorphous behavior of glass substrate with a continuous curve ~20˚ to 35˚ in 2θ range was depicted in ‘figure 3(a)’ and was clearly evidenced in ZnO coated substrates. A comparatively low intensity and broadness in diffraction peaks was observed in single layer deposited ZnO thin film ‘figure

PET fibers with MWNTs or PCS-MWNTs were prepared via melt spinning. The microstructure and molecular structure of MWNTs and PCS-MWNTs were characterized by field-emission scanning electron microscopy (FESEM) and Fourier-transform infrared (FTIR spectroscopy. The morphological structures, mechanical, thermal, and flame retardant properties of the PET fibers containing MWNTs or PCS-MWNTs were analyzed by FESEM, therogravimetry, differential scanning calorimetry, cone and electronic tension meter method

Carbon nanotubes (CNTs) are molecular-scale cylindrical tubes of graphitic carbon1. Their unique structures give them an extremely large surface area, good electronic conductivity, excellent thermal stability and strength. CNTs have been successfully applied in various fields such as medicine delivery2, aerospace3, construction4 and incorporated into numerous consumer products5, with potential uses in everything from tennis racquets and bulletproof vests to electronic components and energy storage

Molecular spectroscopy allows us to identify molecules in locations that are not easily accessible, such as the upper layers of the Earth’s atmosphere, interstellar clouds, and the atmospheres of other planets. In fact, it is the shape of a spectral line that provides a “window” to look deep inside the mechanism governing the absorption and emission of radiation and their interpretation. Besides identifying molecules, spectroscopic techniques can provide information on the physical properties of

of the medium. Thermodynamic adsorption parameters (Kads, ΔGads) of studied inhibitors were calculated using the Langmuir adsorption isotherm. The presence of iodide ions in the medium increased the efficiency of these inhibitors. AC impedance spectroscopy was used to determine the polarization resistance. The scanning electron microscopy (SEM) showed the corrosion products decreased after using these inhibitors. In addition, the best inhibitor in this study used to increase corrosion inhibition

Title: Determination of Iron in Natural water by Spectrophotometry. Aim: To determine the iron in natural water by spectrophotometry. Abstract: The iron in natural water was determined by utilizing spectrophotometric analysis. That was done by measuring the absorbance of five Fe(oPH)2+3 standards at 510 nm. From that information, a calibration curve was plotted and used to find the amount of Fe2+ that was in two unknown water samples based on the absorbance readings obtained with them at 510nm. The

A vibration can result in an absorption peak of infrared radiation, only if there is a change in the dipole moment of the molecule. The larger this change, the more intense will be the absorption band. Furthermore, the electron polarity vectors in the covalent bond should not cancel out i.e the covalent bonds must be asymmetric. Asymmetrical bonds carry a net polarity vector and show absorption peaks; bonds that are centered along the plane of symmetry cancel out their polarity vectors upon stretching

The speciation of WO3 species and the effect of B2O3 on the coordination states of WO3 species were surveyed by the UV–vis DRS technique, and the results are shown in Fig 6. All the spectra were obtained by deducting the spectrum of the support UiO-66. For comparison, the UV–vis DRS spectrum of bulk WO3 is also presented, exhibiting a strong absorption band at 450 nm with a weak shoulder at 360 nm, accompanied by relatively weaker bands at 230 and 280 nm (Fig. 6A-a), and these bands are attributed

Dehydration and moderate fever are the casual enormities a person faces throughout his/her life. Similarly, in my teenage years, I also overcame such a condition and carelessly disregarded it as another week of some light nausea and fever. However, the stomach sickness and continuant abdominal cramps left me thinking upon other possibilities. But my undying habit or love for unhealthy and processed foods made me overlook my stomach pains. I rather intentionally disregarded the fact in face of fear