Scholars International Journal of Chemistry and Material Sciences (SIJCMS)
Sch Int J Chem Mater Sci
Prof. Osman Ibrahim Osman
Scholars Middle East Publisher
Country of Origin:
“Scholars International Journal of Chemistry and Material Sciences ” ISSN 2616-8669 (Print) & ISSN 2617-6556 (Online) is a Monthly, peer reviewed, open access, Journal published by published by “Scholars Middle East Publishers”, Dubai, UAE. This Journal publishes Original Research Articles, Review Article, Discussion Papers, Viewpoints, Mini-Reviews, Short Communications, Book reviews, Essays within the whole field of Chemistry and Material Sciences and their related fields.
Scope of Journal
The scopes of “Scholars International Journal of Material Sciences” includes all the areas of research activities and findings in all fields of Chemistry and Material Sciences and their related fields like Physical Chemistry, Analytical Chemistry, Biochemistry, Organic Chemistry and Inorganic Chemistry Materials Chemistry, Theoretical Chemistry, Macromolecular (Polymer) Chemistry, Nuclear Chemistry, Metallurgy, Forensic Chemistry, Medicinal Chemistry, Aerospace, automotive, Manufacturing, Nuclear Industry, Oil and Gas, Pharmaceuticals, Telecommunications, earth sciences etc.
Impact of Insulation and Sheathing PVC Mixture on the Physical Properties
Abdel Hamid M. S. Esmail
Page Numbers : 24-30
DOI : 10.36348/sijcms.2020.v03i03.002
The cable insulation and sheathing industry uses many different types of plastics depending on usage, application. Physical and electrical properties are one of the most important factors that compete and help to choose these materials when compared with other materials. These properties change with the change of the chemical components of the plastics mixture. The use of PVC material in the manufacture of cable wire coating has been used for decades. In this study, the effect of changing the proportions of the used components in the PVC mixture of the physical and electrical properties of cable wiring materials was investigated. Emphasis was placed on three properties: Tensile Strength and Loss of Mass and Insulation Resistance. In this study author discussed how to enhance these properties and improve them by working to raise the proportions of some of the substances in the PVC mixture while preserving other properties. The study aimed to prove the strong relationship between some components of PVC mixture used in cable insulation and sheathing industry and the physical and electrical properties of these products, and then focus on three components in the mixture and three properties. Random samples were taken and the mean percentages of the ingredients in the mixes were taken using various tools and several statistical methods such as correlation coefficient and regression analysis to prove the relationship between the ratios of some materials and the properties. After the analysis, the p-value was less than 0.05, which reinforces the relationship between the ratio and the properties. Finally, the physical and electrical properties of PVC blends can be improved by changing component ratios to reach the optimized mixture for specific use and application, taking into account other competitive issues such as the final price of the product, environmental impact, and others issues.
Original Research Article
March 18, 2020
Study on the Extraction Technology of Flavonoid from Dandelion
The extraction technology of total flavonoid from dandelion was optimized by single factor screening and orthogonal test. The method of solvent extraction was used, and ethyl acetate was used as solvent, solid-liquid ratio, extraction temperature and extraction time were invested to study the effects of the extraction. On the basis of single factor, three-factor and three-level orthogonal test were carried out to optimize the extraction process of flavonoid from dandelion. The results showed that the factors of the extraction effect of flavonoid were influenced by the time of extraction, the ratio of material to liquid, and the temperature of extraction in turn, it was found that the time of extraction had the most significant effect on the extraction of flavonoid from dandelion. The results showed that the optimal conditions of extraction were as following: the ratio of solid-liquid was 1:70, the temperature of extraction was at 70 ℃, and the time of extraction was 1.5 h. Flavonoid was extracted from dandelion at the best conditions, flavonoid was obtained, and the content of flavonoid was 7.18%. The process is simple, reproducible, economical and feasible.
Original Research Article
Feb. 29, 2020
Simulation Production of Dimethylether (DME) from Dehydration of Methanol Using Aspen Hysys
Ezeddin H. Alshbuki, Mufida M. Bey, Abduraouf ALAmer Mohamed
Page Numbers : 13-18
DOI : 10.36348/sijcms.2020.v03i02.002
Dimethyl ether (DME) is used primarily as a propellant and a motor fuel alternative, (DME) is miscible with most organic solvents and has a high solubility in water. Recently, the use of (DME) as a fuel additive for diesel engines has been investigated due to its high volatility (desired for cold starting) and high cetane number of 55–60, with the advantage of high efficiency, and low exhaust emissions (no particulates, no Sulphur, and low NOx). Technical-quality (DME) is an alternative to liquefied petroleum gas (LPG). The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for (DME) synthesis is simulated in Aspen Hysys V3.1 based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR model of vapor phase was selected as the fluid package as it is able to handle selected pure components (methanol, water and dimethyl ether). The equilibrium reaction was selected to describe conversion of methanol to DME reaction and it is about 80%. A feasibility study and design of a plant producing 99.9 wt% Dimethyl ether (DME). The plant is designed which is capable of producing 50,000 metric tons of (DME) per year via the catalytic dehydration of methanol over an acid zeolite catalyst.
Original Research Article
Feb. 23, 2020
Preparation and Purification of Single-Walled Carbon Nanotubes
Jinling Gao, Yongfu Lian, Xiaoxue Gao, Dezhao Hua
Page Numbers : 8-12
DOI : 10.36348/sijcms.2020.v03i02.001
As a functional material, high-purity single-walled carbon nanotubes are widely used in basic science and nanotechnology, such as mechanics, thermology, electricity, etc. Single-walled carbon nanotubes prepared by arc discharge method have fewer defects and are more suitable for mechanical and electrical applications; therefore, arc discharge method was adopted to prepare single-walled carbon nanotubes in this paper. Firstly, single-walled carbon nanotubes were prepared by dc arc discharge. Then, single-walled carbon nanotubes were purified by physical and chemical synthesis, after burning, acidification and selective dissolution in organic solvent, single-wall carbon nanotubes with high purity were obtained. Single-walled carbon nanotubes which purified before and after was investigated by Uv-visible-near-infrared spectroscopy, resonance Raman spectroscopy and high-resolution transmission electron microscopy.
Original Research Article
Jan. 30, 2020
Analysis of Selected Physicochemical Parameters of Soil Used for Cultivation of Enset (Ensete Ventricosum) in West Showa Zone
Teressa Bedada, Alemayehu Abebaw
Page Numbers : 1-7
DOI : 10.36348/sijcms.2020.v03i01.001
The aim of this study was to investigate the some selected physicochemical parameters in soil samples. The soil characterization was carried out for parameters like moisture content, pH, electrical conductivity, organic carbon and organic matter, cation exchange capacity and exchangeable base (K, Na, Ca and Mg). The results obtained revealed that the physicochemical parameters in the soil samples were in the range of:10.50-11.25% for moisture content, 6.45-6.66 for pH, 0.63-0.89 dS/m for electrical conductivity, 4.27-8.03% for organic carbon, 7.34-13.86 % for organic matter, 33.54-48.45 cmol/kg for cation exchange capacity, exchangeable base (0.77-0.86 cmol/kg for Na, 2.63-3.01cmol/kg for K, 10.25-10.89 cmol/kg for Ca and 0.52-1.40 cmol/kg for Mg). pH was found to slightly acidic and good for maximum availability of the primary nutrients required for plant growth. The values of electrical conductivity indicated that all samples of the soil are good in soil. Statistical test of significance using ANOVA revealed that there were significant differences (P>0.05) between the values of physicochemical parameters in the soil samples obtained from three sampling sites except exchangeable base. Correlation analysis was also employed to examine the relationship between the various parameters in the soil samples.
Original Research Article
Dec. 26, 2019
Study on Optimization of Extraction Technology of Anthocyanin Extracted From Purple Eggplant Peel by Quadric Orthogonal Rotation Combination Design
In order to obtain the optimal extraction conditions of anthocyanin in purple eggplant peel, purple eggplant peel was used as experimental material, the single factor test conditions were screened through determinating the content of anthocyanin in the crude extraction solution. The optimum range of the concentration of ethanol, the ratio of liquid and material ratio, the time of extraction, and the temperature of extraction were determined. Then the quadratic regression orthogonal rotation combination design was used to optimize the extraction process of anthocyanin. Four factors and regression model of content of anthocyanin were obtained. The results showed that the factors affecting the extraction efficiency of anthocyanins were as follows: the concentration of ethanol > the temperature of extraction > the ratio of liquid and material ratio > the time of extraction. Finally, the optimum extraction conditions of anthocyanin extracted from purple eggplant peel were obtained as follows: the concentration of ethanol was 78.6%, the ratio of liquid and material ratio was 60:1 (mL g-1), the temperature of extraction was 20 ℃, the time of extraction was 150 min, and the content of anthocyanin was up to 4.2399 (mg g-1). The crude extracting solution of anthocyanin was clear and stable, and the color of stable extracting solution was dark red. The validation experiment was carried out at the optimized conditions, and the preferable results were obtained, which showed that the optimization of extraction technology of anthocyanin in purple eggplant peel by this method was reliable, and which had practical guiding significance.
Original Research Article
Dec. 20, 2019
Proximate Analysis and Quantification of Polycyclic Aromatic Hydrocarbons in Some Smoked and Roasted Food Items
Omodara Niyi Basil, Fehintola Ezekiel Oluwaseun, Ojo Babatunde Moses
Page Numbers : 127-131
DOI : 10.36348/sijcms.2019.v02i08.001
Analysis for the presence and concentration of sixteen Polycyclic Aromatic Hydrocarbons (PAHs) were carried out in roasted plantain, roasted meat and smoked fish in Ondo, Ondo State Nigeria. The proximate analysis was carried out using the method of AOAC. A representative portion of about 5 g of sample was taken from the homogenized sample and extracted with ultrasonicator using three solvent systems: methanol, methanol: dichloromethane (1:1v/v) and dichloromethane. The aromatic fraction was subsequently analyzed with Gas Chromatography (GC/FID). The results showed that the percentage fat content ranges from 4.32 % roasted plantain to 19.27 % roasted meat, protein content ranges from 6.07 % roasted plantain to 44.86 % smoked fish, the moisture contents ranges from 19.39 % smoked fish to 58.31 % roasted plantain while the carbohydrate ranges from 8.89 % roasted meat to 22.09 % roasted plantain. From the result of GC/FID analysis, sixteen PAHs found in the samples ranged from 0.99 – 0.10 μg/kg, 0.01 – 0.73 µg/kg and 0.00 – 0.72 µg/kg for roasted plantain, roasted meat and smoked fish respectively. The sum of all PAHs concentration found in the samples was 6.16 µg/kg for roasted plantain, 6.22 µg/kg for roasted meat and 4.97 µg/kg. The ratios of phenathrene to anthracene ranged from 1.21 in fish to 3.66 in meat, which suggest that the PAHs are from pyrogenic source. Similarly, the ratios of Flouranthene to Pyrene which ranged from 1.01 in plantain to 3.76 in fish also suggest pyrogenic source due to combustion and the benzo (a) anthracene to chrysene ranged from 0.03 in meat to 0.51 in plantain which equally suggested pyrogenic source. Thus, the relatively high concentration of PAHs in the roasted plantain and meat may be attributed to the smoking process.