Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Green synthesis and characterization of silver nanoparticles using Scrophularia Striata extract
494
506
EN
Tayeb
AB Matin
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Nahid
Ghasemi
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Keivan
Ghodrati
Department of Chemistry, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Majid
Ramezani
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
10.33945/SAMI/ECC.2019.6.1
Here, green synthesis of silver nanoparticles (NPs) using aqueous extract of Scrophularia Striata was demonstrated. In order to obtain the best formation conditions of NPs, different physicochemical parameters such as volume of the extract, silver ion concentration, temperature and reaction time were studied. Synthesized resultant NPs were characterized using UV, SEM, TEM, EDX, XRD, FT-IR and DLS analyses. A color change to brown after adding the extract to the silver nitrate solution was observed which indicated the formation of silver NPs. The synthesized silver NPs by Scrophularia Striata extract showed the highest absorbance at 426 nm. Plants use as stabilizing and reducing agents for NPs, due to their antioxidant properties and many secondary compounds.
Green synthesis, silver nanoparticles,Scrophularia Striata,Silver nitrate
https://www.echemcom.com/article_92370.html
https://www.echemcom.com/article_92370_779a84aae107bb4c9c74be7b479320b2.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Intravenous promethazine vs. diazepam to reduce symptoms of peripheral vertigo in emergency section: a double blind clinical trial
507
517
EN
Saeed
Hayati
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Reza
Yazdani
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Soghra
Fallahi
Cardiovascular Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Zivar
Atashbar
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
Seyed Ashkan
Tabibzadeh Dezfuli
Trauma and Emergency Medicine Research Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
10.33945/SAMI/ECC.2019.6.2
The present research aimed to compare the effectiveness of promethazine and diazepam in patients suffering from acute peripheral vertigo. This is a double blind clinical trial with a sample of 154 patients visiting the emergency section of Shahid Mohammadi Hospital in Bandar Abbas in 2017-18. The participants were randomly divided into two groups of 77, one treated with intravenous promethazine (50 mg) and the other with intravenous Diazepam (10 mg). The severity of vertigo was measured qualitatively and quantitatively 20 minutes later in both groups. Participants were 46 (29.9%) male and 108 (70.1%) female visiting the emergency section of hospital. The mean score of vertigo severity in Promethazine group was 44.44±17.94 and that of Diazepam group was 2.49±+3.87. The severity scores before and after the treatment in promethazine group were respectively 7.75±1.59 and 2.72±1.93. The mean scores of vertigo severity before and after the treatment in promethazine group was -5.04+2.10 and in the diazepam group it was -3.83+3.09. The intergroup difference was statistically significant (p=.013). The results revealed that intravenous promethazine and diazepam applied 20 minutes after prescription are both effective in controlling the severity of vertigo. Considering the probability of occurrence of extrapyramidal side-effects it can be suggested that the infusion of this medication be done slowly and take longer time. Meanwhile, vital signs should be precisely controlled.
Acute peripheral vertigo,Promethazine,Diazepam,low blood pressure,Nausea,Vomiting
https://www.echemcom.com/article_92372.html
https://www.echemcom.com/article_92372_441601063cf55956bb4006a878c8dc91.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Study of bendamustine anticancer drug in gaseous and in a few selected liquid solvents phases using functional density theory (DFT)
518
526
EN
Mehri
Deilam
Department of Chemistry, Payame Noor University, P.O. BOX 19395‐3697 Tehran, Iran
Ashraf Sadat
Ghasemi
Department of Chemistry, Payame Noor University, P.O. BOX 19395‐3697 Tehran, Iran
Fereydoun
Ashrafi
Department of Chemistry, Payame Noor University, P.O. BOX 19395‐3697 Tehran, Iran
10.33945/SAMI/ECC.2019.6.3
In this research, Bendamustine anticancer drug in main and excited states in gaseous phase and in water, ethanol and methanol solvent phases have studied, using DFT and at MPW1PW91/6-311++G(d, p) theoretical level. The molecules of solvent affected the equilibrium structure of species. The effects of solvents have studied by Polarized continuum model (PCM). The optimized structural parameters in gaseous and in water, ethanol and methanol solvent phases as frequency data, relative energy, dipole moment, the energy of highest occupied molecular orbital (HOMO), the energy of lowest unoccupied molecular orbital (LUMO), density functional graphs and gap energies have calculated. The results of theoretical computations confirm that the structure of drug, in both the main and the excited states, is more stable in liquid phase than in gaseous phase, and most stable in water. The computation results confirm that the drug stability increase by increasing in polarizability of solvent.
Bendamustine,gaseous and liquid phases,main state,Excited state,Polarizability
https://www.echemcom.com/article_92373.html
https://www.echemcom.com/article_92373_e144f8e037105be6916d3ab8acb85946.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Biosynthesis and characterization of silver nanoparticles: A thymbra spicataL extract approach and study of their antibacterial and antifungal activity
527
544
EN
Tayeb
AB Matin
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Nahid
Ghasemi
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Keivan
Ghodrati
Department of Chemistry, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Majid
Ramezani
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
10.33945/SAMI/ECC.2019.6.4
In this study, at first, the biosynthesis of silver nanoparticles (Ag NPs) using an aqueous extract of Thymbra spicataL was studied and then, the shape and size of synthesized NPs were characterized by different analysis such as UV-Vis, TEM, SEM, EDX, XRD, DLS and FT-IR. The synthesized Ag NPs were evaluated for their antibacterial activity against Escherichia coli (PTTC 1707), Staphylococcus aureus (PTTC 1112), Bacillus cereus (PTTC 1154) and Aspergillus Niger (PTTC 5012) and Candida albicans (PTTC5027) by well diffusion method and determination of minimum inhibitory concentration (MIC). Ag NPs displayed significant antimicrobial activity against the specimens, and they prevented the growth of bacteria and fungi at low concentrations.
Thymbra spicataL,Biosynthesis,Silver nanoparticles,microbial activity,fungal activity
https://www.echemcom.com/article_92375.html
https://www.echemcom.com/article_92375_1858518dc4aba01a6704bff0177c7449.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
The Synthesis of silver nanoparticles using Beetroot extract and its antibacterial and catalytic activity
545
558
EN
Sima
Mehdizadeh
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Nahid
Ghasemi
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
Majid
Ramezani
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran
10.33945/SAMI/ECC.2019.6.5
Silver nanoparticles (NPs) have been synthesized by aqueous Beetroot extract. Effective parameters on the synthesis of silver NPs like pH, extract volume, silver nitrate concentration and time of reaction have been investigated at room temperature. The synthesized silver NPs have been studied with different analysis like UV-Vis, FT-IR, FE-SEM, TEM, and XRD. Our analysis indicates that the level of Surface Plasmon is 439 nm. The shape of NPs is spherical and the size is 20-30 nm by using FE-SEM and TEM technique. Four bacteria (Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Salmonella typhymurium) were used as references bacteria to analyze the antibacterial effect. Antibacterial results show, gram negative bacteria are so sensitive to synthesized silver NP. Recommended method was completely eco-friendly.
Beetroot,Nanoparticles,Antibacterial Activity,Catalytic activity
https://www.echemcom.com/article_92376.html
https://www.echemcom.com/article_92376_99a9fdb9ffefb78056cedfc48103d976.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Magnetically separable modified sulfuric acid (CuFe2O4@SiO2-OSO3H): Preparation, characterization and catalytic application for the synthesis of 1,8-dioxo-octahydroxanthenes
559
570
EN
Ali
Jalaeian-Hadad
Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Abolghasem
Davoodnia
Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Niloofar
Tavakoli-Hoseini
Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
Farzaneh
Tajfirooz
Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran
10.33945/SAMI/ECC.2019.6.6
A nanomagnetic acidic catalyst (CuFe2O4@SiO2-OSO3H) was prepared by the chemical anchoring of sulfuric acid onto the surface of modified CuFe2O4 magnetic nanoparticles and characterized using FT-IR, SEM, EDX, and VSM techniques. The results confirmed that the sulfuric acid is well dispersed on the surface of the nanomagnetic support. The catalytic activity of CuFe2O4@SiO2-OSO3H was evaluated in the synthesis of 1,8-dioxo-octahydroxanthenes under solvent-free conditions. The reactions using this nanomagnetic acidic catalyst could be carried out in lower than 12 min with excellent yields. Also, the catalyst was easily isolated from the reaction mixture by an external magnet and used at least four times without significant loss of activity.
Magnetic nanoparticles,CuFe2O4@SiO2-OSO3H,1,8-dioxo-octahydroxanthenes,Heterogeneous catalyst,solvent‐free conditions
https://www.echemcom.com/article_92377.html
https://www.echemcom.com/article_92377_b4bd72ec62b5de092d5889ece11a6ef6.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Use of data mining in the corrosion classification of pipelines in catalytic reforming units (CRU)
571
581
EN
Amir
Samimi
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Soroush
Zarinabadi
Department of Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Amir Hossein
Shahbazi Kotanaei
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Alireza
Azimi
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Masoumeh
Mirzaei
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
10.33945/SAMI/ECC.2019.6.7
Nowadays, computational tools for analyzing and collecting data in the operation of petroleum units are essential. One of the methods is the classification or regression is to step in the overall process of knowledge extraction. In this article, one of specific type of decision called the conditional contract arrangement, is used to extract the relevant knowledge in Catalytic Reforming Units (CRU) for 4 factors: Density, PH, total iron ions in vessels (S.FE) and H2S. All of these factors are related to corrosion in CRU units and this paper aims to optimize some conditions to eliminate it. In this regard, using ammonium water with a specific range and pH can be helpful. According to the obtained results the best range of density (in Feed) is less than 0.515 kg/m3, PH (water in vessels) is more than 6.7, S.FE is less than 1.5 ppm and H2S in recycle gas is less than 700 ppm. The outcomes also show how this approach can be used to gain insight into some refineries and how to deliver results in a comprehensible and user-friendly way.
Ammonium water,corrosion,tree decision algorithm,catalytic reforming unit,computational tools
https://www.echemcom.com/article_92379.html
https://www.echemcom.com/article_92379_e7a3b76ea6709d0bba8e3bd88710d47a.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
The mechanism of proton transfer and tautomerism in barbituric acid: A theoretical study
582
594
EN
Mohammad
Zakarianezhad
Department of Chemistry, Payame Noor University, P.O. BOX 19395-4697 Tehran, Iran
Batool
Makiabadi
Department of Chemical Engineering, Sirjan University of Technology, Sirjan, Iran
Motahare
Shool
Department of Chemistry, Payame Noor University, P.O. BOX 19395-4697 Tehran, Iran
Mahboobeh
Hasanpour
Department of Chemistry, Payame Noor University, P.O. BOX 19395-4697 Tehran, Iran
10.33945/SAMI/ECC.2019.6.8
Intermolecular proton transfer in barbituric acid (BA) both in the gas phase and in the presence of water molecule was investigated using the B3LYP method with aug-cc-pVDZ basis set. The overall process involves keto-enol and lactam-lactim tautomerism that occurs. The most stable form of barbituric acid turns into the intermediates with three-step proton transfer at three different positions of the structure of this compound. Then, these intermediates become to the final products passing through two competing processes. In order to determine the priority of each competitive process, energy changes of all possible tautomeric forms were investigated along with the role of solvent molecules in multiple routes. Also, transposition in the proton transfer process makes changes in the electron transfer energy which was investigated both in the gas phase and in the presence of water molecules. Frequency calculations performed to characterize ground and transition states and calculation of zero point energies. Natural bond orbital analysis and topological property of electron density were investigated using natural bond orbital (NBO) and atoms in molecules (AIM) analysis. From the results, all proton transfer process in the gas phase and in the presence of the solvent molecule (water) is exothermic and non-spontaneous. In the gas phase and in the water assisted condition, the route 1b is kinetically more preferred. Despite the increase of the increase of ring resonance of stronger hydrogen bonds in the product compared to the reactant, the products are more unstable than the reactant. Therefore, the only factor can make the product unstable is the severe decrease of LP (N) →σ* (C-O) electron transfer energy.
Barbituric acid,Tautomerism,Proton transfer,Charge transfer,Stability
https://www.echemcom.com/article_92381.html
https://www.echemcom.com/article_92381_c47f7a2331ab068029365bf5d1d74dcb.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Creation of biodegradable polymeric materials with antimicrobial properties
595
603
EN
Irina
Krish
Doctor of Chemical Sciences, Associate Professor. Moscow State University of Food Production 125080, Moscow, Volokolamskoye Highway, 11
irinakrish2000@gmail.com
Olga V
Beznaeva
Candidate of Technical Sciences, Moscow State University of Food Production 125080, Moscow, Volokolamskoye Highway, 11
olgazaikina@mail.ru
Olga A
Bannikova
Candidate of Technical Sciences, Moscow State University of Food Production 125080, Moscow, Volokolamskoye Highway, 11
bannikova2016@rambler.ru
Dmitry M
Myalenko
Candidate of Technical Sciences, Moscow State University of Food Production 125080, Moscow, Volokolamskoye Highway, 11
myalenkod@list.ru
Valentina A
Romanova
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
bwal1307@rambler.ru
10.33945/SAMI/ECC.2019.6.9
In the current study, development of the polymer packaging modification technology with natural antimicrobial and antioxidant components were carried out. The aim was to add some new properties to the packaging in order to prolong the shelf life of packaged food products. The birch bark extract with the main active ingredient betulin and dihydroquercetin was used as the natural modifier. The natural starch-based fillers were used to impart the biodegradation effect on the polymeric materials. Definition of the rheological properties of polymers, deformation-strength characteristics of polymer compositions before and after the composting method, sanitary, and chemical properties of polymer materials were evaluated. It should be noted that the laboratory extruder with ultrasonic processing (US) of the polymer composite materials’ melt (PCM) was used to obtain experimental samples. The results have proved the effectiveness of the usage of ultrasonic treatment to obtain PCM based on betulin and starch. A patent application was generated as well.
Antimicrobial properties,Betulin,Biodegradable Polymeric Materials,Starch,Polymers,Ultrasonic Treatment
https://www.echemcom.com/article_99299.html
https://www.echemcom.com/article_99299_21a0401513584768eb3d943184736200.pdf
Sami Publishing Company (SPC)
Eurasian Chemical Communications
2717-0535
2676-6280
1
6
2019
11
01
Effect of ultrasound exposure on melts of polyolefin compositions
604
612
EN
Irina
Krish
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
irinakrish2000@gmail.com
D A
Pomogova
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
polechka0107@yandex.ru
Izabella S.
Tveritnikova
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
iza-1995@bk.ru
Olga V
Beznaeva
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
olgazaikina@mail.ru
Olga A
Bannikova
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
bannikova2016@rambler.ru
Valentina A
Romanova
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
bwal1307@rambler.ru
Daria M
Zagrebina
Moscow State University of Food Production, 125080, Moscow, Volokolamskoye Highway, 11
dariavet@bk.ru
10.33945/SAMI/ECC.2019.6.10
This study aimed at investigating the dependence of the ultrasonic (US) effects on the structure and properties of the polymer mixtures with different viscosity values. It should be noted that in the current study, polypropylene and high-pressure polyethylene of different brands were selected. The polymer composite materials (PCM) of various compositions treated with and without ultrasound were used. The formation dependence of the phase structures of polyolefin compositions on composition and viscosity of polymer systems was established. The regularity "structure-properties" of modified mixtures of polyolefins was determined. The influence of ultrasonic on the restoration process of the structure and the formation of new chemical bonds in polyolefin mixtures was discussed. The structure of the compositions of the polymer and technological conditions for their processing, which providing high physical and mechanical characteristics of PCM, were also proposed. The results indicated that to create compositions with high physical and mechanical characteristics, it is recommended to use a mixture of polyolefins containing 70% PE, modified by ultrasonic treatment.
polyethylene,Polyolefin Mixtures,Ultrasound,Structure of Composition,Recycling
https://www.echemcom.com/article_100405.html
https://www.echemcom.com/article_100405_211706b9c18bd7219e93ebae50ab3254.pdf