Papers by Keyword: Iodine

Abstract: The use of contrast media on CT scans needs to be done to see the urinary tract clearly. Contrast media itself has side effects that can harm patients if they have allergies. The purpose of this study was to determine if black tea can be used as a natural contrast medium to replace iodine contrast media in CT urography. This study used a case study method by observing a patient diagnosed with hydronephrosis who underwent CT urography. Prior to the examination, the patient had drunk 600 ml of black tea. Examination using CT Scan GE Revolution ACT 32 slices with axial, coronal and sagittal images. The results of the image are then taken to a radiologist and a radiographer to assess the image quality and anatomical clarity in the form of an interview. The results showed that the patient drank 600 ml of plain black tea on a CT-Scan urography examination in cases of Hydronephrosis could open or clarify the ureteral tract, making it easier for doctors to read out radiographs. The use of tea was able to reveal the ureteral groove and facilitate tracking. Black tea with natural ingredients has the opportunity to be a substitute for iodine contrast media which uses chemicals in CT Urography so as to reduce the potential for allergies and side effects to patients and is inexpensive. Studies related to the ratio of black tea and water can be carried out to obtain an optimal density value.

Abstract: Conductive polymer films were prepared from poly (methyl methacrylate) PMMA with (0, 0.3, 0.5, 0.7, and 0.9) wt. % of iodine, using electrospinning technique. A decrease was noticed in the polymer solution viscosity with increasing the iodine weight percentage while both surface tension and electrical conductivity of the polymer solutions were increased .The structure and morphology of the prepared films were characterized by scanning electron microscopy SEM, the average fiber diameter measured statistically from the SEM images and was equal to 800 nm for PMMA with 0.7 wt. % iodine thin film, and 400 nm for the pure PMMA thin film. The electrical conductivity was enhanced for the electrospun films with increasing iodine concentration, from (29.5518× 10^-9 S/cm) for pure PMMA film to (59.3725× 10^-9 S/cm) for PMMA with 0.9 wt. % of iodine additives at room temperature. Activation energy decreased from 0.4483 e.V for pure PMMA to 0.43029 e.V for PMMA with 0.9 wt. % iodine.

Abstract: Lead sulfide films doped with cadmium and iodine ions were obtained by chemical bath deposition from the reaction mixture with thiourea that have thickness of up to 300 nm. An increase in cadmium iodide in the reactor from 5∙10^-5 to 5∙10^-3 mol/l is accompanied by a decrease in the period of the B1 cubic crystal lattice (space group ) from 0.59368 to 0.59355 nm, due to the replacement of Pb²⁺ ions in the PbS crystal lattice by a smaller size of ion Cd²⁺. The cadmium content in the synthesized layers varied from 0.4 to 2.8 at.% with a constant iodine concentration of 1.7–1.9 at.%. An electron microscopic study of the structure showed a decrease in the average crystallite size from 260 nm to 80 nm.

Abstract: Theoretical and practical results on the preparation and investigation of low-melting glasses using the example of glassy chalcogenide glasses of the Ge-S-Br, Ge-Se-Br systems are presented and summarized. On the basis of fundamental properties of matter, correlations were identified with uniform positions. The glass formation regularities in the indicated chalcogenide and oxyhalide systems were determined. Areas and compositions of low-melting chalcogenide and oxyhalide glasses were considered. Approaches to obtaining of thermostable and difficult to crystallize low-melting glasses were found. Areas of their practical application were identified. On the basis of the obtained data, approaches and criteria for obtaining compositions of low-melting chalcogenide and oxide glasses with practically useful properties are formulated.

Abstract: In this study, Graphene Oxide (GO) was prepared by modified Hummers method and characterized by X-ray diffraction technique (XRD). The characteristic peak of GO was observed at 2=10.94° compared to graphite’s peak at 2 = 26.4°. Aqueous stable suspension of GO was prepared, and its stability was confirmed using Zeta potential and found to be-28.9 mV. Electrophoretic Deposition (EPD) process of GO on stainless steel strips was investigated. The EPD process was optimized to obtain a large amount of deposited GO layer. The optimal applied voltage was found to be 30 V and optimal deposition time was 480 seconds. At the optimum conditions, the effect of the addition of iodine was investigated for its effect on the deposited layer homogeneity. Visual investigation of samples indicated that the homogeneity of the GO coated layer was enhanced in the presence of iodine and confirmed by scanning electron microscope (SEM).

Abstract: Soda lakes located close to uranium deposits of West Mongolia contain elevated concentrations of uranium, reaching, in some cases, 1 to 3 mg/l. The concentration of uranium in the lakes of Russian Altai is lower and varies from 0.001 to 0.03 mg/l. The greatest uranium resources (about 6000 tons) are stored in Hyargas Nuur Lake, Western Mongolia. In addition to uranium and salts of sodium and magnesium increased contents of boron (up to 250 mg/l), bromine (up to 1.1 g/l), lithium (up to 600 mg/l), strontium (up to 8 mg/l) were determined in the lake waters. A scheme for complex processing of uranium-bearing lake waters, the first stage of which includes extraction of uranium using iron-containing sorbents or anion exchange resins is considered. Uranium compounds, bromine, iodine, boron, lithium and other elements found in salt lakes are an important raw material base for the production of advanced materials.

Abstract: Ultrasonic velocity and density of salicilaldehyde with iodine in hexane has been measured at 293.15K, 298.15K, 303.15K and 308.15K in different concentration. Ultrasonic velocity has been measured using single frequency interferometer at 2MHz (Model F-81). By using the Ultrasonic velocity (u), density (ρ) and coefficient of viscosity (η) and the other acoustical parameters adiabatic compressibility (κ), free length (L_f), interaction parameter (α), Free volume (V_f) were calculated. The addition of hexane with a mixture leads to a compact structure due to presence of dipolar type interaction. This contributes to the decrease in free volume values and the internal pressure shows an increasing trend. The results have been discussed in terms of solute-solute and solute-solvent interactions between the component and the compatibility of these methods in predicting the interactions in these mixtures has also been discussed.Key Words salicilaldehyde, iodine, hexane, Ultrasonic velocity, molecular interactions.

Abstract: The present study describes a synthesis of a series of iodine-benzimidazole and iodine-benzoxazole derivatives. The new and cheap method for its obtaining is developed. All compounds were characterized by physical, chemical, analytical and spectral data.

Abstract: A new simple, universal and highly-efficient method of substituted semicarbazone, thiosemicarbazone and aminoguanidine synthesis in the presence of I₂ was developed. The method was used to obtain a range of products with the structures confirmed by ¹H NMR Spectra.

Abstract: Two purine-nucleoside monophosphates have been prepared from the corresponding nucleoside 5′-H-phosphonate precursors via sequential silylation, oxidation, and hydrolysis reactions in a one-pot manner. Compared to the reaction performed in the presence of pyridine, the hydrolysis of iodophosphate in the absence of pyridine generated nucleoside 5′-monophosphates as the major product. The experimental results indicated that the reaction between the formed nucleoside 5′-monophosphate with the residual iodophosphate intermediate was relatively slow, making the self-condensed dinucleoside diphosphate a minor product in this reaction.