Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
A new strategy for the synthesis of 2-amino-4H-pyran derivatives in aqueous media using DABCO-Cucl complex as a novel and efficient catalyst
1088
1092
EN
Bita
Baghernejad
0000-0002-1733-0829
Department of Chemistry, Payame Noor University, P.O. BOX 19395-4697 Tehran, Iran
bitabaghernejad@yahoo.com
Mahsa
Fiuzat
Department of Chemistry, Payame Noor University, P.O. BOX 19395-4697 Tehran, Iran
10.22034/ecc.2020.250740.1078
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 <em>via</em> a one-pot multi–component reaction of aldehyde, malononitrile, and dimedone in the presence of DABCO-CuCl as a catalyst in water.
2-amino-4H-pyran,multi–component reaction,One-pot,DABCO-CuCl
https://www.echemcom.com/article_118305.html
https://www.echemcom.com/article_118305_0356d7b2b2e68748baba5f75cc9099a1.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Degree-based topological descriptors of Star of David and Hexagonal Cage networks
1093
1100
EN
Haidar
Ali
0000-0002-9815-7158
Department of Mathematics, Government College University, Faisalabad, Pakistan
haidarali@gcuf.edu.pk
Muhammad
Kashif
Shafiq
0000-0003-1332-7902
Department of Mathematics, University of Management and Technology, Sialkot, Pakistan
kashif4v@gmail.com
Mohammad
Reza
Farahani
0000-0003-2969-4280
Department of Applied Mathematics, Iran University of Science and Technology (IUST), Narmak,Tehran 16844, Iran
mrfarahani88@gmail.com
Murat
Cancan
0000-0002-8606-2274
Faculty of Education, Van Yuzuncu Yıl University, Zeve Campus, Tuşba, 65080, Van, Turkey
mcancan@yyu.edu.tr
Mehmet
Serif
Aldemir
0000-0002-5298-6743
Faculty of Science, Van Yuzuncu Yıl University, Zeve Campus, Tuşba, 65080, Van, Turkey
msaldemir@yyu.edu.tr
10.22034/ecc.2020.251921.1081
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, ABC<sub>4</sub> and GA<sub>5</sub>, indices for the Star of David and Hexagonal Cage networks and provided closed formulas of these indices.
General Randić index,atom-bond connectivity (ABC) index,geometric-arithmetic (GA) index,Star of David network (SD(n)),Hexagonal Cage network (HXCa(n))
https://www.echemcom.com/article_118307.html
https://www.echemcom.com/article_118307_10f2855fd80dbbaeb3c6f4314fecc566.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Applying ultrasonic treatment to melts of polymer compositions under laboratory and experimental industrial conditions
1101
1109
EN
Kirsh Irina
Anatolyevna
0000-0003-4569-7035
Moscow State University of Food Production, 125080 Moscow, Russia
esfehani.mohamad3@gmail.com
Beznaeva
Olga Vladimirovna
Moscow State University of Food Production, 125080 Moscow, Russia
beznaeva.olga@yahoo.com
Bannikova
Olga Anatolyevnaa
Moscow State University of Food Production, 125080 Moscow, Russia
bannikovaolgaanatolyevnaa@yahoo.com
Gubanova
Marina Ivanovna
Moscow State University of Food Production, 125080 Moscow, Russia
gubanovamarinalvanovna@yahoo.com
Tveritnikova
Isabella Sergeevna
Moscow State University of Food Production, 125080 Moscow, Russia
tveritnikovaisabella@yahoo.com
Romanova
Valentina Alexandrovna
Moscow State University of Food Production, 125080 Moscow, Russia
romanovavalentin@yahoo.com
Novikov
Maxim Nikolaevich
Moscow State University of Food Production, 125080 Moscow, Russia
novikovmaxim@yahoo.com
10.22034/ecc.2020.249574.1076
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.
Polymer Composite Materials,Ultrasonic Treatment,Physico-Chemical Properties,Biodegradation
https://www.echemcom.com/article_118647.html
https://www.echemcom.com/article_118647_419d283b64a699183226795d14082ce0.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Adsorption of oil products using modified woodworking waste
1110
1116
EN
Damir
Afgatovich Kharlyamov
0000-0002-7728-4502
Candidate of Technical Sciences, Docent, Department of Chemistry and Ecology, Naberezhnye Chelny Institute, Kazan Federal University, Russia
shukribinbakar@gmail.com
Gennady
Vitalevich Mavrin
Candidate of Technical Sciences, Docent, Department of Chemistry and Ecology, Naberezhnye Chelny Institute, Kazan Federal University, Russia
mavrin-g@rambler.ru
Ilnar Fargatovich
Suleimanov
Candidate of Technical Sciences, Docent, Department of Chemistry and Ecology, Naberezhnye Chelny Institute, Kazan Federal University, Russia
real7best@mail.ru
10.22034/ecc.2020.243413.1066
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<strong>.</strong>
Chemical modification,magnetic sorption material,waste wood fiber
https://www.echemcom.com/article_118708.html
https://www.echemcom.com/article_118708_36b4fedc25b12d19455643db2ea1f528.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
New degree-based topological descriptors via m-polynomial of boron α-nanotube
1117
1125
EN
Deeba
Afzal
0000-0001-5268-7260
Department of Mathematics and Statistics, The University of Lahore, Lahore, 54000, Pakistan
deebafzal@gmail.com
Sabir
Hussain
0000-0002-2441-0077
Department of Mathematics and Statistics, The University of Lahore, Lahore, 54000, Pakistan
sabirbutt34@gmail.com
Mehmet
Serif
Aldemir
0000-0002-5298-6743
Faculty of Science, Van Yuzuncu Yıl University, Zeve Campus, Tuşba, 65080, Van, Turkey
msaldemir@yyu.edu.tr
Mohammad
Reza
Farahani
0000-0003-2969-4280
Department of Applied Mathematics, Iran University of Science and Technology, Tehran, Iran
mrfarahani88@gmail.com
Farkhanda
Afzal
0000-0001-5396-7598
MCS, National University of Sciences and Technology, Islamabad, Pakistan
farkhanda@mcs.edu.pk
10.22034/ecc.2020.254614.1092
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.
M-polynomial,Boron α-nanotube,Topological indices
https://www.echemcom.com/article_118781.html
https://www.echemcom.com/article_118781_781e67bed646d294e0826babe0c4dd03.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Impact of ultrasonic treatment on physicochemical properties of polyethylene compositions containing silver nanoparticles
1126
1136
EN
Kirsh Irina
Anatolyevna
0000-0003-4569-7035
Moscow State University of Food Production, 125080 Moscow, Russia
esfehani.mohamad3@gmail.com
Frolova
Yulia Vladimirovna
Federal Research Center of Nutrition and Biotechnology, 109240, Moscow, Russia
frolovayulia@yahoo.com
Beznaeva Olga
Vladimirovna
Moscow State University of Food Production, 125080 Moscow, Russia
beznaevaolga@yahoo.com
Bannikova Olga
Anatolyevna
Moscow State University of Food Production, 125080 Moscow, Russia
bannikovaolgaanatolyevna@yahoo.com
Gubanova Marina
Ivanovna
Moscow State University of Food Production, 125080 Moscow, Russia
gubanovamarina@yahoo.com
Kondratova Tamara
Alexandrovna
Moscow State University of Food Production, 125080 Moscow, Russia
kondratova.tamara@yahoo.com
10.22034/ecc.2020.249577.1077
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.<br /> <strong> </strong>
polyethylene,Thermoplastic Starch,Silver nanoparticles,Antimicrobial properties,Physico-chemical characteristics,Ultrasonic Treatment,Biodegradation
https://www.echemcom.com/article_118648.html
https://www.echemcom.com/article_118648_8b0dae1b9f7f43d7b6d408ab3ff1332b.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Multiplicative degree-based topological indices and line graph of hex board graph
1137
1145
EN
Shahid
Amin
0000-0003-0342-2885
Department of Mathematics, University of Management and Technology, Lahore, Pakistan
shahidabdulaziz9@gmail.com
Muhammad
Aziz Ur
Rehman
0000-0002-7415-1317
Department of Mathematics, University of Management and Technology, Lahore, Pakistan
aziz.rehman@umt.edu.pk
Mohammad
Reza
Farahani
0000-0003-2969-4280
Department of Mathematics, Iran University of Science and Technology (IUST) Narmak, 16844, Tehran, Iran
mrfarahani88@gmail.com
Murat
Cancan
0000-0002-8606-2274
Faculty of Education, Van Yuzuncu Yıl University, Zeve Campus, Tuşba, 65080, Van, Turkey
mcancan@yyu.edu.tr
Mehmet
Serif
Aldemir
0000-0002-5298-6743
Faculty of Science, Van Yuzuncu Yıl University, Zeve Campus, Tuşba, 65080, Van, Turkey
msaldemir@yyu.edu.tr
10.22034/ecc.2020.255142.1093
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.
Randić index,Hexagonal network,line graph,topological index,Zagreb index,Hex board
https://www.echemcom.com/article_118943.html
https://www.echemcom.com/article_118943_c898afd276adbe9f4d59f60609e1d645.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
2
11
2020
11
01
Biochemical studies on some plant extracts as antitoxin on rats
1146
1155
EN
Muna
O.
Alamoudi
0000-0001-9225-9885
Biology Department, Faculty of Science, University of Hail, Hail City, Saudi Arabia
munaalamoudi349@yahoo.com
Rabab
M.
Aljarari
0000000000000000
Biology Department, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia
rmaljerary@uj.edu.sa
10.22034/ecc.2020.256114.1096
The chemical characterization and studying the antitoxin effects of <em>Rosmarinus officinalis</em> and <em>Matricaria chamomilla </em>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 <em>R. officinalis</em> 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 <em>M. chamomilla</em>, 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.
R. officinalis,M. chamomilla,Phytochemical,antitoxin and rat
https://www.echemcom.com/article_119166.html
https://www.echemcom.com/article_119166_f6b475bf2d7ca9fd94f2549a44b50a84.pdf