mohammad almasi
Malayer University, Applied Chemistry, Faculty Member
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Azad Islamic University, Chemistry, Faculty Member add
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Associate Professor in Physical Chemistry, Interested in Molecular interactions of liquids aspectedit
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In this article the behavior of cyclohexanone + 1-alkanol, namely, 1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol, binary mixtures through the density and viscosity measurements has been studied as a function of... more
In this article the behavior of cyclohexanone + 1-alkanol, namely, 1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol, binary mixtures through the density and viscosity measurements has been studied as a function of composition and within the temperature range of 293.15–323.15 K. The excess molar volume and viscosity deviations have been calculated and fitted by the Redlich–Kister polynomial equation. For binary mixtures of cyclohexanone + 1-pentanol, values of excess molar volume are negative and for other mixtures are positive. For all binary systems viscosity deviations are negative and increase with the alkyl chain of alcohol. The results provide information on the interactions among the molecules in the pure state as well as the binary liquid mixtures. The measured densities and viscosities have been applied to test the applicability of the PC-SAFT and free volume models.
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Tracking moving objects has been an issue in recent years of computer vision and image processing and human tracking makes it a more significant challenge. This category has various aspects and wide applications, such as autonomous... more
Tracking moving objects has been an issue in recent years of computer vision and image processing and human tracking makes it a more significant challenge. This category has various aspects and wide applications, such as autonomous deriving, human-robot interactions, and human movement analysis. One of the issues that have always made tracking algorithms difficult is their interaction with goal recognition methods, the mutable appearance of variable aims, and simultaneous tracking of multiple goals. In this paper, a method with high efficiency and higher accuracy was compared to the previous methods for tracking just objects using imaging with the fixed camera is introduced. The proposed algorithm operates in four steps in such a way as to identify a fixed background and remove noise from that. This background is used to subtract from movable objects. After that, while the image is being filtered, the shadows and noises of the filmed image are removed, and finally, using the bubble ...
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There is an increasing population rate especially in metropolitan areas and the majority of people living in such areas have to spend some part of their time commuting to their destinations. So, one of the serious concerns for network... more
There is an increasing population rate especially in metropolitan areas and the majority of people living in such areas have to spend some part of their time commuting to their destinations. So, one of the serious concerns for network design is defining an efficient and appropriate network being able to shift passenger's mode from private to public transportation properly. The public transport can have an effective role in deriving passenger satisfaction and reducing the operating cost by means of designing a well-integrated public transit system along with improving the cost-effectiveness network. The main goal of this study is to present an improved model for feeder bus network design problem by minimizing total cost. In this study, Genetic Algorithm (GA) and Particle swarm optimization (PSO) were employed to optimize feeder bus services. The case study and input data which have been applied through the current study were already used by Kuha & Perl (1989). Finally, obtained n...
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Background: Prolificacy has a high economic value and is one of the most important reproduction traits in small ruminants such as Markhoz goats, which is an endangered breed. Objective: To estimate genetic, environmental and phenotypic... more
Background: Prolificacy has a high economic value and is one of the most important reproduction traits in small ruminants such as Markhoz goats, which is an endangered breed. Objective: To estimate genetic, environmental and phenotypic trends, and genetic parameters for litter size (LS), as a prolificacy trait of Markhoz goat does. Methods: The study was conducted using kidding records of 3,064 Markhoz does from 1992 to 2015. Genetic parameters were estimated with a logit link function using ASReml software, fitting a repeatability animal model, with birth year, kidding year, and kidding age as fixed effects, and direct additive genetic and permanent environmental effects as random effects. Genetic, phenotypic and environmental trends were estimated by using regression of breeding value, phenotypic value and environmental deviation averages on birth year, respectively. Results: Low and negligible heritability (0.002), repeatability (0.054) and coefficient of permanent environment (0...
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Weaning traits, including preweaning daily gain (PWDG) and weaning weight (WW) are important economic traits, especially for meat type mammals, with high impacts on growth performance and survival rate in higher ages. This study was... more
Weaning traits, including preweaning daily gain (PWDG) and weaning weight (WW) are important economic traits, especially for meat type mammals, with high impacts on growth performance and survival rate in higher ages. This study was conducted to perform a genome-wide association study (GWAS) on weaning traits in a meat type breed of sheep. Body weight records of 7557 Lori-Bakhtiari sheep with PWDG and WW records were used to estimate breeding values (EBVs) using an animal mixed model. A total of 132 animals were selected by two-tailed selection strategy, based on EBVs for body weight and then were genotyped using Illumina 50k Ovine SNP chip. After quality control, a total of 130 animals and 41323 SNPs were remained for further analyses. De-regressed estimates of breeding values were used as a pseudo-phenotype in GWAS analysis. Based on Bonferroni-adjusted p-values, five SNPs, located on chromosomes 2, 3, 4, 12 and 22 were significantly (p < 0.05) associated with weaning traits an...
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Background: Research shows that prostate cancer ranks second among the top five most common cancers in men. It has been confirmed that when circulating Prostate Specific Antigen (PSA) transcripts are successfully detected, prostate cancer... more
Background: Research shows that prostate cancer ranks second among the top five most common cancers in men. It has been confirmed that when circulating Prostate Specific Antigen (PSA) transcripts are successfully detected, prostate cancer cells can be diagnosed at an early stage. A reverse transcriptase loop-mediated isothermal amplification (RT-LAMP) assay was developed and compared to reverse transcriptase polymerase chain reaction (RT-PCR) assay for detection of PSA. Methods: 47 patients, including 30 patients with prostate cancer, 15 with Benign Prostate Hyperplasia (BPH) and 2 healthy subjects as negative controls were included in this study. The prostate cancer cell lines (PC3 and LNCaP) of two patients were included in the study as positive controls. Next, RNA was extracted from fresh samples and a first strand cDNA synthesis kit was applied for the synthesis of cDNA. The human prostate specific antigen gene was used to design specific primers. Results: The results indicated ...
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A growing concern for public transit is its inability to shift passenger’s mode from private to public transport. In order to overcome this problem, a more developed feeder bus network and matched schedules will play important roles. The... more
A growing concern for public transit is its inability to shift passenger’s mode from private to public transport. In order to overcome this problem, a more developed feeder bus network and matched schedules will play important roles. The present paper aims to review some of the studies performed on Feeder Bus Network Design and Scheduling Problem (FNDSP) based on three distinctive parts of the FNDSP setup, namely, problem description, problem characteristics, and solution approaches. The problems consist of different subproblems including data preparation, feeder bus network design, route generation, and feeder bus scheduling. Subsequently, descriptive analysis and classification of previous works are presented to highlight the main characteristics and solution methods. Finally, some of the issues and trends for future research are identified. This paper is targeted at dealing with the FNDSP to exhibit strategic and tactical goals and also contributes to the unification of the field...
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A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements.... more
A pavement structure consists of several layers for the primary purpose of transmitting and distributing traffic loads to the subgrade. Rutting is one form of pavement distresses that may influence the performance of road pavements. Geosynthetics is one type of synthetic materials utilized for improving the performance of pavements against rutting. Various studies have been conducted on using different geosynthetic materials in pavement structures by different researchers. One of the practices is a reinforcing material in asphalt pavements. This paper intends to present and discuss the discoveries from some of the studies on utilizing geosynthetics in flexible pavements as reinforcement against permanent deformation (rutting).
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ABSTRACT Loop-mediated isothermal amplification in conjunction with enzyme-linked immunosorbent assay (LAMP-ELISA) provides a sensitive, specific and cost-effective method for detection of etiological causes of infections. The present... more
ABSTRACT Loop-mediated isothermal amplification in conjunction with enzyme-linked immunosorbent assay (LAMP-ELISA) provides a sensitive, specific and cost-effective method for detection of etiological causes of infections. The present study developed a reliable LAMP-ELISA diagnostic kit for identification of Salmonella serogroup D strains and evaluated its potential use in the detection of Salmonella serovars Enteritidis and Typhi. The LAMP-ELISA assay used a serogroup D/A-specific primer set to amplify a region of the prt gene, followed by hybridization of the digoxigenin-labeled products to a highly specific oligonucleotide probe for exact identification of serogroup D serovars. Among the bacteria tested, a positive reaction was only observed for strains belong to Salmonella serogroup D. The detection limit of the LAMP-ELISA assay was 4 CFU per tube, which was lower than PCR-ELISA assay with the same target gene (50 CFU per tube). Finally, the technique was successfully applied to an artificially contaminated meat sample with a detection limit 10(3) CFU mL(-1), which was 10 times more sensitive than PCR-ELISA. Overall, the LAMP-ELISA assay could be used as a sensitive alternative method to PCR-ELISA for the specific detection of Salmonella serogroup D serovars in routine food microbiology or clinical laboratories worldwide.
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The laser thermal lens spectroscopy was used to analyze the thermal behavior of methanol, ethanol, and 1-propanol with CCl4 binary mixtures. Using this method, the values of thermal lens characteristic time, thermal diffusivity, thermal... more
The laser thermal lens spectroscopy was used to analyze the thermal behavior of methanol, ethanol, and 1-propanol with CCl4 binary mixtures. Using this method, the values of thermal lens characteristic time, thermal diffusivity, thermal conductivity, thermo-optical parameters for three binary mixtures at 298.15 K and different volume fractions were measured experimentally. The effect of alcohol chain length on the experimental parameters and molecular interactions was discussed. Changes in the measured TL signals as a function of concentration indicate that these results originate from physical and molecular properties of liquid components. Calculated parameters were used to explain molecular forces among unlike molecules. Furthermore, the Soret coefficient ST for the stated binary mixtures was calculated. Findings demonstrate that increasing the chain length of alcohol enhances its tendency to interact with CCl4. Measured parameters for the pure materials with this technique are in good agreement with the scientific literature.
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ABSTRACT Densities and viscosities of mixtures of N,N-dimethylformamide with 2-propanol, 2-butanol, 2-pentanol, 2-hexanol, and 2-heptanol have been measured as a function of composition range at T = (298.15, 303.15, 308.15, 313.15) K and... more
ABSTRACT Densities and viscosities of mixtures of N,N-dimethylformamide with 2-propanol, 2-butanol, 2-pentanol, 2-hexanol, and 2-heptanol have been measured as a function of composition range at T = (298.15, 303.15, 308.15, 313.15) K and atmospheric pressure. Excess molar volumes VmE and viscosity deviations Δη were calculated and correlated by the Redlich–Kister type function. The statistical associating fluid theory (SAFT), and perturbed chain statistical associating fluid theory (PC-SAFT) were applied to correlate and predict the volumetric behavior of the mixtures. The best predictions were achieved with the PC-SAFT equation of state. Also the Peng–Robinson–Stryjek–Vera (PRSV) equation of state (EOS) has been used to predict the binary viscosities.
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The density and viscosity values at T= (293.15 to 323.15) K for binary mixtures of nitromethane with 2-propanol, 2-butanol and 2-pentanol were measured over the entire composition range. From the experimental data, excess molar volumes,... more
The density and viscosity values at T= (293.15 to 323.15) K for binary mixtures of nitromethane with 2-propanol, 2-butanol and 2-pentanol were measured over the entire composition range. From the experimental data, excess molar volumes, thermal expansion coefficients, excess thermal expansions, partial molar volumes at infinite dilution and deviations in viscosity were calculated. The results were discussed in terms of intermolecular interactions and structure of studied binary mixtures. Free-volume theory coupled with the Peng–Robinson–Stryjek–Vera equation of state has been applied for calculation of viscosities of pure compounds and the binary liquid mixtures. The Agreement between experimental data and theoretical values was satisfactory.
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In this paper, the investigation on thermophysical properties, structure, and dominant interactions in the binary systems containing 1-hexyl-3-methylimidazolium nitrate ([Hmim][NO3]) and 2-alkanol (2-propanol, 2-butanol, and 2-pentanol)... more
In this paper, the investigation on thermophysical properties, structure, and dominant interactions in the binary systems containing 1-hexyl-3-methylimidazolium nitrate ([Hmim][NO3]) and 2-alkanol (2-propanol, 2-butanol, and 2-pentanol) were carried out through the Kirkwood–Buff (KB) integrals, structural factor, and excess molar volumes. Binary i and j parameters are positive and indicate that unlike molecules tend to form the strong interactions via forming hydrogen bonds and stay alongside while an increase in the carbon atom of 2-alkanols reduces the strength of bonds and tendency of the unlike molecules to be together. Also, the structure of mixtures was studied using the concentration–concentration structure factor, \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${{S}_{{CC}}}(0)$$\end{document}. Results from the application of this parameter show that in all binary mixtures, heterocoordination is predominant, ordering occurs in solutions and fluctuations are less than random orientation. Moreover the chemical short-range order parameter α′, which is an important function to understand the complex formation and phase segregation in the liquid mixtures, was calculated and discussed for mentioned mixtures. For current binary mixtures, experimental data and theoretical investigations are novel and reported for the first time.
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Abstract New experimental data of density and viscosity for the binary mixtures of 1-butyl-3-methylimidazolium nitrate ([Bmim][NO3]) with + 2-propanol, 2-butanol and 2-pentanol are reported over the entire range of mole fraction at... more
Abstract New experimental data of density and viscosity for the binary mixtures of 1-butyl-3-methylimidazolium nitrate ([Bmim][NO3]) with + 2-propanol, 2-butanol and 2-pentanol are reported over the entire range of mole fraction at T = (293.15–323.15) K. To elucidate possible intermolecular interactions between the chemical species present in solutions, the excess molar volume, V m E thermal expansion coefficient, α excess thermal expansion coefficient, α E the isothermal coefficient of excess molar enthalpy, ∂ H m E / ∂ P T , x partial molar volume, V i ¯ and deviation in viscosity, Δ η were calculated. The excess molar volume of the binary mixture is negative over the entire mole fraction range and becomes more negative with increase in the temperature. Deviation in the viscosity is negative over the whole range of composition and decreases with increasing temperature. The obtained excess molar volume and deviation in viscosity were fitted to the Redlich–Kister polynomial equation. The experimental results have been discussed regarding molecular interactions and the formation of complex between unlike molecules. Influences of temperature and carbon chain length of alcohols were discussed.
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Abstract In present paper, densities and viscosities of propanal, 2-propanol, 2-butanol, 2-pentanol and their binary mixtures with propanal were measured at temperatures 293.15–323.15 K. From these data, excess molar volumes and... more
Abstract In present paper, densities and viscosities of propanal, 2-propanol, 2-butanol, 2-pentanol and their binary mixtures with propanal were measured at temperatures 293.15–323.15 K. From these data, excess molar volumes and deviations in viscosity were calculated. Excess molar volumes are negative over the whole concentration range and increase with rising temperature. Viscosity deviations show positive values for all studied mixtures and decrease as temperature increases. The ability of SAFT and PC-SAFT equations for correlation of densities of binary mixtures and pure state was tested. The liquid density of the binary mixture was obtained accurate by both SAFT and PC-SAFT models but PC-SAFT equation is closely matched with the experimental data. Maximum AAD is 0.082% for SAFT and 0.043% for PC-SAFT model.
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Densities and viscosities have been measured for the binary mixtures of triethylene glycol with + 2-propanol, 2-butanol and 2-pentanol over the entire range of mole fraction at T = 293.15–323.15 K. From experimental data, the excess molar... more
Densities and viscosities have been measured for the binary mixtures of triethylene glycol with + 2-propanol, 2-butanol and 2-pentanol over the entire range of mole fraction at T = 293.15–323.15 K. From experimental data, the excess molar volume, thermal expansion coefficient, excess thermal expansion coefficient and deviation in viscosity were calculated. The experimental results have been discussed in terms of molecular interactions and formation of molecular complexes between unlike molecules. Influence of temperature and carbon chain length of alcohols on mentioned properties was discussed. Moreover, the friction theory coupled with PC-SAFT equation of state was applied to produce the viscosities of pure data and binary mixtures.
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Abstract The densities and viscosities of mixtures of a hydrocarbon fuel (JP-10) with methyl tert-butyl ether (MTBE) or ethyl tert-butyl ether (ETBE) were determined at different temperatures (293.15, 298.15, 303.15, 308.15 and 313.15) K,... more
Abstract The densities and viscosities of mixtures of a hydrocarbon fuel (JP-10) with methyl tert-butyl ether (MTBE) or ethyl tert-butyl ether (ETBE) were determined at different temperatures (293.15, 298.15, 303.15, 308.15 and 313.15) K, over the entire composition range. Excess molar volumes, viscosity deviation and excess Gibbs energies of activation of mixtures were calculated and fitted to the Redlich–Kister equation. The excess molar volumes are negative over the entire range of composition. The viscosity data have been correlated with several semi-empirical equations. The thermodynamic functions of activation were also calculated. The refractive indices of the systems were also measured for temperatures of (293.15, 303.15 and 313.15) K. The results provide important information on the research and application of JP-10 and fuel ethers as additives.
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In present paper, density, and viscosity values for binary systems of benzaldehyde + 2-propanol or 2-butanol or 2-pentanol have been measured over the entire range of composition and within the temperature range of 293.15–323.15 K. From... more
In present paper, density, and viscosity values for binary systems of benzaldehyde + 2-propanol or 2-butanol or 2-pentanol have been measured over the entire range of composition and within the temperature range of 293.15–323.15 K. From these data, thermal expansion coefficient, excess thermal expansion coefficient, the pressure dependence of the excess molar enthalpy, partial molar volume, excess molar volume, and viscosity deviation were calculated. VmE is positive and decreases with rise of temperature and Δη is negative and increases with increasing temperature. Effect of temperature and carbon chain of alcohols on thermodynamic behavior of mixtures was discussed. The density values were used to test the applicability of the PC-SAFT model and the calculated density by this theory compared well with the corresponding experimental data.
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In this paper, molecular interactions in the binary mixtures composed of a xylene and selected 1-alkanol (1-butanol up to 1-octanol) were investigated by measurement of the density at T= 323.15 K. From the experimental data, excess molar... more
In this paper, molecular interactions in the binary mixtures composed of a xylene and selected 1-alkanol (1-butanol up to 1-octanol) were investigated by measurement of the density at T= 323.15 K. From the experimental data, excess molar volumes were calculated. Obtained data were interpreted based on the type and magnitude of the physico-chemical interactions in the binary liquid systems. In this sense, PC-SAFT was used to correlate the volumetric behavior of binary mixtures. The correlated values of the model were satisfactory and the obtained data are within the uncertainty region.
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Densities, structural effects and viscosities of binary nonelectrolyte systems including nitrobenzene + 2-propanol, 2-butanol and 2pentanol at temperatures (293.15 to 323.15) K and normal atmospheric pressure were measured using an... more
Densities, structural effects and viscosities of binary nonelectrolyte systems including nitrobenzene + 2-propanol, 2-butanol and 2pentanol at temperatures (293.15 to 323.15) K and normal atmospheric pressure were measured using an Anton-Paar SVM 3000 stabinger viscometer. Excess molar volumes V E m and viscosity deviations Δη were calculated and correlated by the Redlich-Kister equation to estimate the standard uncertainty. These values are negative over the full range of composition for all studied mixtures. Free volume theory coupled with the Peng-Robinson equation of state was used to correlate liquid viscosities of pure compounds and binary mixtures. The agreement between measured viscosity data and values calculated from this model is within experimental uncertainties.
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The density and viscosity of three binary mixtures composed of methyl tert-butyl ether (MTBE) with 2-propanol, 2-butanol, and 2-pentanol over the whole composition range at 293.15 to 323.15 K were measured. The excess molar volume and... more
The density and viscosity of three binary mixtures composed of methyl tert-butyl ether (MTBE) with 2-propanol, 2-butanol, and 2-pentanol over the whole composition range at 293.15 to 323.15 K were measured. The excess molar volume and deviation in viscosity , were calculated and interpreted in terms of intermolecular interactions among the species in the mixtures. For all binary mixtures, negative values of and were fitted to the Redlich-Kister polynomial function. By increasing temperature, and were reduced and increased, respectively. The density of the binary systems was modeled in terms of the perturbed chain statistical associating fluid theory (PC-SAFT) and compared with the corresponding experimental data. Maximum of deviation between the experimental data and calculated values by this theory is 1.4% and belongs to the MTBE + 2-butanol system
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In this article the behavior of tetrahydrofuran (THF) + 2-alkanol namely 2-propanol, 2-butanol, 2-pentanol, 2-hexanol and 2-heptanol binary mixtures through the density and viscosity measurements has been studied as a function of... more
In this article the behavior of tetrahydrofuran (THF) + 2-alkanol namely 2-propanol, 2-butanol, 2-pentanol, 2-hexanol and 2-heptanol binary mixtures through the density and viscosity measurements has been studied as a function of composition and within the temperature range of 293.15-313.15 K. The excess molar volume, isobaric thermal expansivity, partial molar volumes, and viscosity deviations have been calculated. For all binary mixtures, values of excess molar volume are positive and viscosity deviations are negative while increasing with the alkyl chain of the alcohol. The results provide information on the interactions among the molecules in the pure state as well as the binary liquid mixtures. The measured densities and viscosities have been applied to test the applicability of the PC-SAFT model and friction theory coupled with the Peng-Robinson-Stryjek-Vera equation of state.
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Molecular interactions in binary mixtures composed of a xylene and selected 1-butanol 1-pentanol, 1-hexanol, 1-heptanol and 1-octanol was investigated by measuring the viscosity at T= 303.15 K. From experimental data, viscosity deviation... more
Molecular interactions in binary mixtures composed of a xylene and selected 1-butanol 1-pentanol, 1-hexanol, 1-heptanol and 1-octanol was investigated by measuring the viscosity at T= 303.15 K. From experimental data, viscosity deviation was calculated. Values of viscosity deviations for all binary mixtures are negative and increase with increase of alcohols chain length. Obtained data were interpreted based on the type and magnitude of the physico-chemical interactions in the binary liquid systems. free volume theory was applied to correlate the viscosities of binary mixtures and correlated values by this model were good enough and obtained data were within the uncertainty region.Keywords: Viscosity; xylene; 1-Alkanol; free volume theory
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The densities of binary mixtures consisting of methanol, ethanol, 1-propanol, 1-butanol and 1-pentanol with 1,3-propanediol were measured at the temperatures 293.15, 298.15, 303.15 and 313.15 K and at atmospheric pressure. Measurements... more
The densities of binary mixtures consisting of methanol, ethanol, 1-propanol, 1-butanol and 1-pentanol with 1,3-propanediol were measured at the temperatures 293.15, 298.15, 303.15 and 313.15 K and at atmospheric pressure. Measurements were made over the full range of compositions and for the pure compounds using a vibrating tube densimeter. Excess molar volumes were obtained from these experimental results and were fitted to a Redlich- Kister type expansion. The results were interpreted in terms of molecular inter- actions and structural factors of the alcohols. It was observed that an increase in the carbon chain length of the alcohol led to lower interactions on mixing. The Peng-Robinson-Stryjek-Vera (PRSV) Equation of state was used to cor- relate the binary excess molar volumes.
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Abstract This paper attempts to describe the types and nature of interactions present in binary mixtures containing valeric acid and 1-alkanols (1-pentanol up to 1-decanol) using theoretical and experimental methods. The density and... more
Abstract This paper attempts to describe the types and nature of interactions present in binary mixtures containing valeric acid and 1-alkanols (1-pentanol up to 1-decanol) using theoretical and experimental methods. The density and viscosity of the mixtures above were measured at temperatures of 293.15 K to 323.15 K. Values of excess molar volumes (VmE) and viscosity deviations(Δη) were calculated. The findings indicate that strong interactions occur in binary solutions containing short-range 1-alkanol, and increasing the length of the alcohol chain causes a weakening of intermolecular interactions. To confirm the experimental results, the conductor-like screening model for real solutions (COSMO-RS) method was used to calculate the activity coefficients of the compounds in the liquid mixtures and the contact probability (CP) of alcohols with the valeric acid. Then, the D parameter, the concentration-concentration structure factor (SCC(0)), and the chemical short-range order parameter (α') were obtained and used to describe the existing interactions for binary mixtures. For binary systems, viscosity and density data are novel and have not previously been reported.