Original Research Article
Organic Chemistry
Bita Baghernejad; Mahsa Fiuzat
Abstract
2-Amino-4H-pyran derivatives are reported to have a broad spectrum of biological and pharmacological activities. Some are endowed with anticoagulant, spasmolitic, diuretic, anticancer and antianaphylactin. On the other hand, some 2-amino-4H-pyrans also can be employed as cognitive enhancers, for the ...
Read More
2-Amino-4H-pyran derivatives are reported to have a broad spectrum of biological and pharmacological activities. Some are endowed with anticoagulant, spasmolitic, diuretic, anticancer and antianaphylactin. On the other hand, some 2-amino-4H-pyrans also can be employed as cognitive enhancers, for the treatment of neurodegenerative disease, including Alzheimer's disease, amyotrophic. In this research, 2-amino-4H-pyran derivatives were synthesized with good yields via a one-pot multi–component reaction of aldehyde, malononitrile, and dimedone in the presence of DABCO-CuCl as a catalyst in water.
Original Research Article
Methematical Chemistry
Haidar Ali; Muhammad Kashif Shafiq; Mohammad Reza Farahani; Murat Cancan; Mehmet Serif Aldemir
Abstract
Topological indices are numerical parameters of a graph that characterize its molecular topology. In theoretical chemistry, the numerical parameters which are used to depict the molecular topology of graphs are called topological indices. Several physical and chemical properties like boiling point, entropy, ...
Read More
Topological indices are numerical parameters of a graph that characterize its molecular topology. In theoretical chemistry, the numerical parameters which are used to depict the molecular topology of graphs are called topological indices. Several physical and chemical properties like boiling point, entropy, heat-formation and vaporization enthalpy of chemical compounds can be determined through these topological indices. Graph theory has a considerable use in evaluating the relation for various topological indices of some derived graphs. In this paper, we studied the general Randić, first Zagreb, ABC, GA, ABC4 and GA5, indices for the Star of David and Hexagonal Cage networks and provided closed formulas of these indices.
Original Research Article
Analytical chemistry
Kirsh Irina Anatolyevna; Beznaeva Olga Vladimirovna; Bannikova Olga Anatolyevnaa; Gubanova Marina Ivanovna; Tveritnikova Isabella Sergeevna; Romanova Valentina Alexandrovna; Novikov Maxim Nikolaevich
Abstract
Nowadays, environmental protection has become a global issue due to the sharp increase of waste as a result of the rapid and almost uncontrollable growth in the consumption of synthetic plastics in many sectors of the economy. The issue of the disposal of the products is therefore becoming increasingly ...
Read More
Nowadays, environmental protection has become a global issue due to the sharp increase of waste as a result of the rapid and almost uncontrollable growth in the consumption of synthetic plastics in many sectors of the economy. The issue of the disposal of the products is therefore becoming increasingly important. The creation of biodegradable materials is one of the most acceptable ways to solve the issue, along with the development and research of new biodegradable polymer materials. This study approached the physicochemical properties and the decomposition time of biodegradable polymer compositions obtained by the impact of the ultrasonic treatment on their melts under the laboratory and experimental industrial conditions. The results indicated that The ultrasonic treatment of polymer composite materials (PCMs), based on starch and polyethylene, could lead to the increase in their physicomechanical properties by 1.5-2 times, compared with the control samples, which is associated with the uniform distribution of the filler in the polymer matrix.
Original Research Article
Environmental Chemistry
Damir Afgatovich Kharlyamov; Gennady Vitalevich Mavrin; Ilnar Fargatovich Suleimanov
Abstract
We obtained magnetic sorption materialbasedon wood processing wastes by chemical modification. The elemental composition of the initial and modified samples was determined. It was revealed that magnetic sorption material had sorption properties regarding to oil products dissolved in an aqueous medium. ...
Read More
We obtained magnetic sorption materialbasedon wood processing wastes by chemical modification. The elemental composition of the initial and modified samples was determined. It was revealed that magnetic sorption material had sorption properties regarding to oil products dissolved in an aqueous medium. Sorption properties at pH=4 and pH=7 on model solutions containing petroleum products under static conditions were studied. To establish the effect of temperature, the experiments were carried out in a thermostatic medium at temperatures of 15, 25 and 35 °C. It was established that in an acidic medium and with increasing temperature, the cleaning efficiency of model solutions decreased, which indicated the probablity of the physical adsorption. At pH=7 in an aqueous medium using the method of variable weights and constant concentrations, isotherms of oil products adsorption were constructed. According to the classification of Giles, received isotherms relate to L class (Langmuir class). The maximum adsorption capacity-0.0323 mmol/g was observed at a temperature of 15 °C and an increase in temperature to 35 °C adsorption capacity decreased to 0.0309 mmol/g. The calculations of thermodynamic parameters showed that the process of adsorption of oil products on the considered sorption material could be described by the Dubin-Radushkevich model, which was due to physical interaction. The Boyd’s model was used to obtain insight into the mechanism of the physical adsorption kinetics. It was found that the kinetics of the processes of oil product adsorption on magnetic sorption material was limited by external diffusion.
Original Research Article
Methematical Chemistry
Deeba Afzal; Sabir Hussain; Mehmet Serif Aldemir; Mohammad Reza Farahani; Farkhanda Afzal
Abstract
The study of molecular structure having size less than 100 nm is called nanotechnology. Nano-materials have vast applications in different fields. Boron α-nanotube is very famous in Nano-science. In this article, we computed some important topological indices of this structure using their M-polynomial ...
Read More
The study of molecular structure having size less than 100 nm is called nanotechnology. Nano-materials have vast applications in different fields. Boron α-nanotube is very famous in Nano-science. In this article, we computed some important topological indices of this structure using their M-polynomial along with plotting the results.
Original Research Article
Analytical chemistry
Kirsh Irina Anatolyevna; Frolova Yulia Vladimirovna; Beznaeva Olga Vladimirovna; Bannikova Olga Anatolyevna; Gubanova Marina Ivanovna; Kondratova Tamara Alexandrovna
Abstract
Ensuring the microbiological safety of food products is a problem currently at issue. The use of antimicrobial packaging materials is a way of solving the problem. Accordingly, the aim of this work was to create packaging materials based on polyethylene (PE) and silver nanoparticles (Ag-NPs) using the ...
Read More
Ensuring the microbiological safety of food products is a problem currently at issue. The use of antimicrobial packaging materials is a way of solving the problem. Accordingly, the aim of this work was to create packaging materials based on polyethylene (PE) and silver nanoparticles (Ag-NPs) using the ultrasonic treatment of the melt to obtain antimicrobial materials that provide an extended shelf life of packaged food products. Materials based on PE were obtained with Ag-NPs concentrations of 0.5%, 1.0%, 2.0% and 5.0% with and without ultrasonic treatment of melts. Standard methods for studying rheological, physicomechanical, antimicrobial properties and sanitary-chemical indicators of materials were used in the article. It was found that ultrasonic treatment increases the melt flow and contributes to the production of materials with the uniform distribution of additives. The Ag-NPs content from 1.0% and higher in the contents of the material provides antimicrobial properties. The prolongation of the shelf life of the food product, stored in a material based on PE and Ag-NPs 2.0%, was established. In the study of oxygen and water vapour permeability of polymer compositions based on PE and Ag-NPs, it was found that the introduction of a filler increased vapour permeability by about 8-10%, compared with the control samples. The development of polymer composite materials (PCM) with antimicrobial properties and degradability was carried out.
Original Research Article
Computational Chemistry
Shahid Amin; Muhammad Aziz Ur Rehman; Mohammad Reza Farahani; Murat Cancan; Mehmet Serif Aldemir
Abstract
Mathematical chemistry is the area of research in mathematics, in which problems of chemistry are solved by utilizing techniques of mathematics. In mathematical chemistry, a number is assigned to molecular graph of compound called topological index (TI) which depends on the topology of compound and helps ...
Read More
Mathematical chemistry is the area of research in mathematics, in which problems of chemistry are solved by utilizing techniques of mathematics. In mathematical chemistry, a number is assigned to molecular graph of compound called topological index (TI) which depends on the topology of compound and helps us in deciding properties of concerned compound. TIs usually depend on the degree of vertices in a graph, distances and spectrum, among which degree depending TIs are studied extensively in recent years and have led to huge applications in theoretical chemistry, drugs formulation and pharmacy. This paper aimed to compute some degree depending TIs of Hex board networks and line graph of hex board networks. The generalized first and second multiplicative Zagreb indices (ZIs), multiplicative version of Atomic bond connectivity index (ABC) and generalized multiplicative Geometric Arithmetic index (GA) of Hex board and the line graph of Hex board networks were computed in this study.
Original Research Article
Biochemistry
Muna O. Alamoudi; Rabab M. Aljarari
Abstract
The chemical characterization and studying the antitoxin effects of Rosmarinus officinalis and Matricaria chamomilla extracts were as follows: Phytochemical screening, Total Polyphenols and Flavonoids content and Antitoxin effects on rats. Bio extracts were shown through color analysis containing phytochemical ...
Read More
The chemical characterization and studying the antitoxin effects of Rosmarinus officinalis and Matricaria chamomilla extracts were as follows: Phytochemical screening, Total Polyphenols and Flavonoids content and Antitoxin effects on rats. Bio extracts were shown through color analysis containing phytochemical compounds such as (Terpens, Tannins, Flavonoids, Saponins, Alkaloids, Glycosides, Ph. Glycosides and Resins). Ethanolic extract of R. officinalis had the highest of total polyphenols and flavonoids contents, which were 152.00 mgGAE/g and 17.44 mgQE/g, respectively. It was followed by the aqueous extract of the same plant leaves, which were 139.08 mgGAE/g and 15.00 mgQE/g. The total polyphenols and flavonoids contents of ethanolic extract for M. chamomilla, were 144.00 mgGAE/g and 15.06mgQE/g. Next came the aqueous extract of the same plant leaves, which were, 127.11 mgGAE/g and 13.79 mgQE/g. The study showed the active effect of plant extracts as antitoxin when tested on rats. The results showed that the plant leave extracts increased the body weight, and improved antioxidant biomarkers and blood biochemical of rat.
)
)
)
)
)
)
)