Al-Nahrain Journal of Science

The concept chromatographycan be used to refer to a huge variety of distinct analytical procedures. Each of these procedures utilizes a mobile phase and an immobile phase as a basic component, yet they all belong under the chromatography umbrella concept.The subsequent component separation that is carried out is based on the disparity in concentration ratio that can be detected between the two phases. This disparity acts as the basis for the subsequent component separation that is carried out. Due to the limits of current technology, there is presently no detector that is universally applicable to high-performance liquid chromatography (HPLC), it is required to choose a detector in accordance with the characteristics of the chemicals that are to be examined. The measurements of absorbance in ultraviolet and visible spectrum, known as UV-Vis, or disclosing fluorescence are the foundations of the most common types of fluorescence detectors. In HPLC the components of the apparatus consist of a carrier phase, which is typically a solvent with a buffer solution; a pump; an injector; a column; a detector; and an integrator. The column is the most important part of the system where the various components are separated from one another. Based on that, there are manyvarious kinds of columns through which the behavior of the components to be separated by these columns is understood. Due to the fact that chromatography is such a widely used technology.

Prior to the start of production, several factors must be considered, including the price, effectiveness, and environmental friendliness of batteries. Ionic liquids and deep eutectic solvents have shown significant success when employed as electrolytes with Titanium-graphite cells, especially when combined with additives that enhance their conductivity by reducing the high viscosity of these liquids. Evaluating the discharge voltage of the AlCl3-chloroacetamide IL with DCM as an additive revealed a voltage of 1.16V and an internal resistance of 11 Ohm. These electrochemical cells exhibited an intriguing response. Otherwise, when utilizing CaCl2.2H2O: Acetamide DES with DI water as an additive, the cell voltage measured 0.97V,with an internal resistance of 23 Ohm. Moreover, these cells demonstrated thermal stability during both charging and discharging processes, which can be attributed to the concentration and quality of the ionic species. Furthermore, the surfaces of the Titanium electrodes were examined using FESEM and EDXA equipment to assess the impact of the ionic liquid and DES on these electrodes.

This projectis regardingthesynthesis of new bi-α-amino nitrile compoundsderived from the reaction of di-amine , aldehyde (vanillin oro-vanillin ),and KCN in glacial acetic acid as a solvent . The three components-one pot reactionproduced (2,2'-(1,2-phenylenebis(azanediyl))bis(2-(4-hydroxy-3-methoxyphenyl)acetonitrile) (I) and(2,2'-(1,2-phenylenebis(azanediyl))bis(2-(2-hydroxy-3-methoxyphenyl)acetonitrile) (II)consideringtheformation of bi-imine compounds as intermediate. α-amino nitrile compounds (I and II) were characterized using infrared spectroscopy and mass spectroscopy. The prepared compounds were screened for their anti-microbialactivity. The bacteria are Gram positive (Staphylococcus aurous) and Gram negative (Escherichia coli) in vitro, the results werepromising; due to the large inhibition zones.

The Schiff base compound, benzyl hydrogen-4-(dimethylamino) benzylidene hydroxycarbon hydrazodithiate(BHDBHH), was investigated under continuous wave laser beam irradiation (30 mW), and its chemical properties were analyzed. The material's chemical properties were found to be affected during laser processing. We examined the chemical properties of the Schiff base using a Scanning Electron Microscope (SEM) and energy-dispersive X-ray (EDX) Spectroscopy. By varying the exposure time, we discovered that longer exposure times resulted in a darker colouration of the compound, even at a low power of 30 mW. Thisfinding led us to conclude that the compound is highly sensitive to laser exposure and can be easily diffused with a more powerful laser. The EDX test revealed a significant reduction in the sulfur element, with more than 50% of it being burned during theexposure.

Polyvinyl chloride (PVC) has attracted great attention because of its applications in different fields such as industrial and medical fields. In this work PVC has been reacted with diphenylglyoxime (DPG) in Tetrahydrofuran (THF) to form PVC–DPG polymer, then the synthesized polymer reacted with alcoholic solutions of different metal ions (Fe(II), Co(II), Ni(II), Pd(II), Pt(IV) and Cu(II) to form colored metal ion complexes. All compounds are characterized by Fourier-transform infrared (FTIR), Ultraviolet (UV-Vis) spectroscopies, magnetic susceptibility and conductivity measurements. All complexes were examined with staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative), confirming the biological activity against these bacteria.