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Journal articles on the topic 'Pure and mixed solvent systems'

Author: Grafiati

Published: 18 May 2024

Last updated: 31 July 2025

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1

Feng, Jin, Xunhui Li, Lianjie Zhai, et al. "Thermodynamic Behavior of Erythromycin Thiocyanate Dihydrate in Six Pure Solvents and Two Binary Solvents." Molecules 30, no. 11 (2025): 2424. https://doi.org/10.3390/molecules30112424.

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Thermodynamic parameters play a crucial role in analyzing and optimizing crystallization processes. In this investigation, the solubility profiles of erythromycin thiocyanate dihydrate were determined gravimetrically under atmospheric pressure (0.1 MPa) across six monosolvent systems (methanol, n-propanol, methyl acetate, ethyl acetate, propyl acetate, and water) and two binary solvent mixtures (water–methanol and water–n-propanol), spanning a temperature range of 278.15–318.15 K. The results showed that the solubility of erythromycin thiocyanate dihydrate is apparently affected by temperature

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2

Ekezie, C., G. Cookey, and J. Maduelosi. "Volumetric and viscometric studies of binary mixtures of methanol and some alkyl acetates at varying temperatures." South African Journal of Chemistry 77 (2023): 133–37. http://dx.doi.org/10.17159/0379-4350/2023/v77a16.

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The degree of molecular interactions between mixed solvent molecules and thus ideal behavior results from the molecular architecture and chemical nature of component solvents. This understanding is essential in the design and applications of both pure and mixed solvent systems. Density and viscosity measurements of pure and binary mixtures of methanol and n-methyl acetate, n-butyl acetate, and n-pentyl acetate were carried out at different compositions of methanol and temperatures of 25, 30, 35, 40 °C. The experimental data obtained were correlated to the Redlich-Kister equation from where the

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3

Wang, Luoluo, Minchang Wang, Ying Kang, Yong Zhu, Hai Chang, and Ning Liu. "Solubility Determination and Comprehensive Analysis of the New Heat-Resistant Energetic Material TNBP." Molecules 28, no. 6 (2023): 2424. http://dx.doi.org/10.3390/molecules28062424.

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To improve the crystal quality of 4,8-bis(2,4,6-trinitrophenyl)difurazolo [3,4-b:3′,4′-e] pyrazine (TNBP), the solubility of TNBP in organic solvents (six pure and four mixed solvents) was determined by the laser monitoring technique from 293.15 to 353.15 K. The results showed that the solubility was positively correlated with the increase in the experimental temperature and the main solvent content, except for the co-solvent phenomenon in the DMSO + ethyl acetate solvent mixture. To explain the dissolution behavior of TNBP, the KAT-SER model was analyzed for pure solvent systems, and it was f

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4

Roy, Nath, Lovely Sarkar, and Kumar Sarkar. "Study of solute-solvent interactions of nicotinic acid and benzoic acid in methanol and its binary solvent systems." Journal of the Serbian Chemical Society 73, no. 12 (2008): 1235–46. http://dx.doi.org/10.2298/jsc0812235r.

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The apparent molar volumes, ?V, and viscosity B-coefficients, B, for nicotinic acid (NA) and benzoic acid (BA) in mixed solvents containing 10, 20, 30 mass % of n-amyl alcohol (n-AmOH) or isoamyl alcohol (i-AmOH) in methanol and in pure methanol (MeOH) were determined from the solution density and viscosity measurements at 298.15 K as function of concentrations of NA and BA. These results were, in conjunction with the results obtained in pure methanol, used to deduce the partial molar volumes of transfer, 0 ??V , and viscosity B-coefficients of transfer, ?B, for NA and BA from methanol to diff

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5

Esan, Olaseni Segun, Medinat Olubunmi Osundiya, Christopher Olumuyiwa Aboluwoye, Owoyomi Olanrewaju, and Jide Ige. "Thermodynamic and Interfacial Properties of DTABr/CTABr Mixed Surfactant Systems in Ethanolamine/Water Mixtures: A Conductometry Study." ISRN Thermodynamics 2013 (December 17, 2013): 1–7. http://dx.doi.org/10.1155/2013/280101.

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Mixed-micelle formation in the binary mixtures of dodecyltrimethylammonium bromide (DTABr) and cetyltrimethylammonium bromide (CTABr) surfactants in water-ethanolamine mixed solvent systems has been studied by conductometric method in the temperature range of 298.1 to 313.1 K at 5 K intervals. It was observed that the presence of ethanolamine forced the formation of mixed micelle to lower total surfactant concentration than in water only. The synergistic interaction was quantitatively investigated using the theoretical models of Clint and Rubingh. The interaction parameter β12 was negative at

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6

Shamsher Ali, Shamsher Ali, Shabir Hussain Shabir Hussain, and Irfan Ali and Syed Azhar Ali Irfan Ali and Syed Azhar Ali. "Determination of Thermodynamic Parameters from the Dissolution of Strontium Hydroxide in Water and Mixed Solvent Systems by pH-Metric Method." Journal of the chemical society of pakistan 42, no. 1 (2020): 57. http://dx.doi.org/10.52568/000621.

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In this study, saturated solutions of Sr(OH)2 in pure water and in mixed solvent systems (methanol - water, ethanol - water, 1-propanol - water, and 2-propanol - water) at two temperatures were prepared and titrated with standard HCl solution by using pH metry. Using these titration data, the molar solubility (s), solubilty product (Ksp) and Gibbs free energy (Go), entropy change (ΔSand#176;) and enthalpy change (ΔHand#176;) for dissolution of strontium hydroxide was determined. At room temperature (20and#176;C), the s, Ksp, ∆Go were found to be 4.28 x 10-2 mol L-1, 3.13 x 10-4 mol3L-3 and 19

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Shamsher Ali, Shamsher Ali, Shabir Hussain Shabir Hussain, and Irfan Ali and Syed Azhar Ali Irfan Ali and Syed Azhar Ali. "Determination of Thermodynamic Parameters from the Dissolution of Strontium Hydroxide in Water and Mixed Solvent Systems by pH-Metric Method." Journal of the chemical society of pakistan 42, no. 1 (2020): 57. http://dx.doi.org/10.52568/000621/jcsp/42.01.2020.

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In this study, saturated solutions of Sr(OH)2 in pure water and in mixed solvent systems (methanol - water, ethanol - water, 1-propanol - water, and 2-propanol - water) at two temperatures were prepared and titrated with standard HCl solution by using pH metry. Using these titration data, the molar solubility (s), solubilty product (Ksp) and Gibbs free energy (Go), entropy change (ΔSand#176;) and enthalpy change (ΔHand#176;) for dissolution of strontium hydroxide was determined. At room temperature (20and#176;C), the s, Ksp, ∆Go were found to be 4.28 x 10-2 mol L-1, 3.13 x 10-4 mol3L-3 and 19

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8

Yin, Dai-ping, Meng-xi Liu, Hua-lin Fu, et al. "Solubility of Trimethoprim in Selected Pure Solvents and (Water + Ethanol/2-Propanol) Mixed-Solvent Systems." Journal of Chemical & Engineering Data 61, no. 1 (2015): 404–11. http://dx.doi.org/10.1021/acs.jced.5b00616.

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9

Wang, Li, Rui Xu, Ruohua Liu, Peng Ge, Wei Sun, and Mengjie Tian. "Self-Assembly of NaOL-DDA Mixtures in Aqueous Solution: A Molecular Dynamics Simulation Study." Molecules 26, no. 23 (2021): 7117. http://dx.doi.org/10.3390/molecules26237117.

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The self-assembly behaviors of sodium oleate (NaOL), dodecylamine (DDA), and their mixtures in aqueous solution were systematically investigated by large-scale molecular dynamics simulations, respectively. The interaction mechanisms between the surfactants, as well as the surfactants and solvent, were revealed via the radial distribution function (RDF), cluster size, solvent-accessible surface area (SASA), hydrogen bond, and non-bond interaction energy. Results showed that the molecules more easily formed aggregates in mixed systems compared to pure systems, indicating higher surface activity.

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10

Satyanarayana, D., and P. R. Chatterji. "Swelling characteristics of amphiphilic polymer brushes in pure and mixed solvent systems." Polymer 34, no. 17 (1993): 3682–86. http://dx.doi.org/10.1016/0032-3861(93)90053-d.

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11

Somsen, G. "Interactions in solutions: A calorimetric study of pure and mixed solvent systems." Pure and Applied Chemistry 63, no. 12 (1991): 1687–96. http://dx.doi.org/10.1351/pac199163121687.

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12

Jia, Qing Xiu, Chao Ming Shi, and Guo Liang Zhao. "Influence of Low Boiling Point Nonsolvents on Morphologies of PA6 Electrospun Fibers." Advanced Materials Research 332-334 (September 2011): 1322–25. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1322.

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In the present contribution, ultra-high molecular polyamide 6 (PA6) solutions were prepared in various pure and mixed-solvent systems and later electrospun with the polarity of the emitting electrode. The PA6 concentration in the as-prepared solutions was fixed at 4 wt%. Some of the solution properties, i.e., surface tension, and conductivity, were measured. In the mixed-solvent systems, formic acid (FA) was blended with dichloromethane (DCM), trichloromethane (THM), and acetone, the influences of low boiling point nonsolvents on morphological appearance and sizes of the resulting PA6 electros

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13

Duereh, Alif, Amata Anantpinijwatna, and Panon Latcharote. "Prediction of Solvatochromic Polarity Parameters for Aqueous Mixed-Solvent Systems." Applied Sciences 10, no. 23 (2020): 8480. http://dx.doi.org/10.3390/app10238480.

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Solvent polarity is important data being used in solvent selections for preliminary engineering design of chemical processes. In this work, a predictive model is proposed for estimating the solvatochromic polarity of electronic transition energy (ET) of Reichardt indicator for aqueous mixtures. To validate the model, the ET values of eighteen aqueous mixtures collected from the literature were used. The predictive model provided a good estimation of ET values with an overall deviation of 2.1%, compared with an ideal model (5.1%) from the mole fraction average. The linear relationship of the co

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14

Acree, William E., Abolghasem Jouyban, and Fleming Martinez. "Comment on “Solubility of Trimethoprim in Selected Pure Solvents and (Water + Ethanol/2-Propanol) Mixed-Solvent Systems”." Journal of Chemical & Engineering Data 62, no. 3 (2017): 1157–60. http://dx.doi.org/10.1021/acs.jced.6b00940.

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15

Aliwarga, Lienda, Herri Susanto, Reynard Reynard, and Agnes Veronica Victoria. "UNIFAC Model for Liquid-Liquid Phase Equilibrium of Penicillin G and 6-APA System." Jurnal Kimia Valensi 5, no. 2 (2019): 185–93. http://dx.doi.org/10.15408/jkv.v5i2.9869.

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This study investigated the effect of pH and type of solvent on liquid-liquid phase equilibrium in the system of pure penicillin G and mixed penicillin G with 6-APA. Penicillin G extraction was carried out in a pH range of 2.0–5.0 at 4 oC using several types of solvents. The liquid-liquid phase equilibrium mathematical model is prepared assuming that a single stage of thermodynamic equilibrium occurs in a batch process of liquid-liquid extraction. The coefficient of activity was calculated by the UNIFAC method. From the experiment, it was found that the extraction process of penicillin G was s

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16

Mehta, Dhruvi R., Raviprakash S. Chandra, and M. M. Maisuria. "Thermodynamic Studies of Complexes of Amlodipine Besylate with Ni2+, Mg2+, Co2+ and Ca2+ cations in pure and in mixed binary solvent systems at 303.15, 313.15 and 323.15 K by Conductometric Method." International Journal of ChemTech Research 13, no. 1 (2020): 206–16. http://dx.doi.org/10.20902/ijctr.2019.130125.

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The present work relates to the complexation reaction between Amlodipine Besylate[AML] with Ni2+, Mg2+, Co2+ and Ca2+ cation in dimethylsulfoxide (DMSO), pure methanol (MeOH) and their binary mixtures(DMSO-MeOH and DMSO-Water) by conductometric method. The conductance data show that the stoichiometry of the complexes formed between AML with Ni2+, Mg2+, Co2+ and Ca2+ cation in pure DMSO, pure MeOHas well as in the binary solvent mixtures was 1:1. The stability of AML complexes with Ni2+ , Mg2+, Co2+ and Ca2+ metal ion was observed to be sensitive to the nature of the solvent system. In case of

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17

Gill, Dip Singh, Lindsay Byrne, and Terry I. Quiekenden. "63Cu Nuclear Magnetic Resonance and Viscosity Studies of Copper (I) Perchlorate in Mixed Solvents Containing Acetonitrile." Zeitschrift für Naturforschung A 53, no. 12 (1998): 1004–8. http://dx.doi.org/10.1515/zna-1998-1213.

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Abstract63Cu nuclear magnetic resonance and viscosity studies of 0.064 M copper (I) Perchlorate solutions have been made at 298 K in binary mixtures of acetonitrile (AN) with dimethylsulphoxide (DMSO), hexamethylphosphotriamide (HMPA), N,N-dimethylacetamide (DMA), nitromethane (NM), propylene carbonate (PC) and 3-hydroxypropionitrile (3 HPN) at several compositions of the mixtures using a 500 MHz NMR Spectrometer and Ubbelohde viscometer, respectively. The chemical shift (δ), linewidth (Δ) and line intensity (I) of the 63Cu NMR signal in these mixed solvents have been measured relative to the

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18

D., KUMAR, and K. GOYAL R. "Advances in Thermodynamics of Amino Acid Solutions." Journal of Indian Chemical Society Vol. 74, July 1997 (1997): 521–24. https://doi.org/10.5281/zenodo.5901306.

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Department of Applied Chemistry, Delhi College of Engineering (University of Delhi), Delhi-110 006 Department of Chemistry, Ramjas College, (University of Delhi), Delhi-110 007 <em>Manuscript received 7 April 1994, revised I April 1996. accepted 13 July 1996</em> The solubility of amino acids have been compiled at different temperatures to understand the thermodynamics of transfer of amino acids in· going from water to various solvent systems and interpreted in terms of solute-solvent interactions and structural changes of the amino acids in solvent mixture. A variety of solubility dete

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19

Cysewski, Piotr, Tomasz Jeliński, Patryk Cymerman, and Maciej Przybyłek. "Solvent Screening for Solubility Enhancement of Theophylline in Neat, Binary and Ternary NADES Solvents: New Measurements and Ensemble Machine Learning." International Journal of Molecular Sciences 22, no. 14 (2021): 7347. http://dx.doi.org/10.3390/ijms22147347.

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Theophylline, a typical representative of active pharmaceutical ingredients, was selected to study the characteristics of experimental and theoretical solubility measured at 25 °C in a broad range of solvents, including neat, binary mixtures and ternary natural deep eutectics (NADES) prepared with choline chloride, polyols and water. There was a strong synergistic effect of organic solvents mixed with water, and among the experimentally studied binary systems, the one containing DMSO with water in unimolar proportions was found to be the most effective in theophylline dissolution. Likewise, fo

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20

Couture, Lorraine, Jacques E. Desnoyers, and Gérald Perron. "Some thermodynamic and transport properties of lithium salts in mixed aprotic solvents and the effect of water on such properties." Canadian Journal of Chemistry 74, no. 2 (1996): 153–64. http://dx.doi.org/10.1139/v96-019.

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In a continuing study on the optimization of the electrolyte medium for high-energy lithium batteries, volumes, heat capacities, and specific conductivities of LiClO4 and LiBr were measured in mixtures of γ-butyrolactone (BUTY) and 1,2-dimethoxyethane (DME) and of propylene carbonate (PC) and BUTY. These results are compared with those of the electrolytes in the pure solvents. Phase diagrams are also reported when appropriate. The effect of addition of water to these binary and ternary systems was investigated with the same techniques. The mixtures DME–BUTY, PC–DME, DME–H2O, and BUTY–H2O are t

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21

Mechi, Lassaad, Khalid S. K. Alshammri, Abdulmohsen K. D. Alsukaibi, et al. "A Study of the Kinetics, Structure, and Morphology of the Effect of Organic Additives on Barium Sulfate Precipitation Reactions in Propan-1-ol–Water and Ethanol–Water Mixture Solutions." Processes 13, no. 5 (2025): 1471. https://doi.org/10.3390/pr13051471.

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Barium sulfate precipitation in production industrial facilities and in petroleum reservoir systems is a dangerous operational problem. The solvent acts as a second component in the system during the onset of crystallization from solution, significant impacting the kinetics. Few studies have investigated the influence of organic solvents on barium sulfate precipitation. In this study, we examine the precipitation reaction of barium sulfate in mixed propan-1-ol–water and ethanol–water solvents at 303.15 K. The temporary conductivity variation is determined to follow the kinetics of the precipit

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22

Teixeira, Gabriel, Dinis O. Abranches, Liliana P. Silva, et al. "Liquefying Flavonoids with Terpenoids through Deep Eutectic Solvent Formation." Molecules 27, no. 9 (2022): 2649. http://dx.doi.org/10.3390/molecules27092649.

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The formation of deep eutectic solvents (DES) is tied to negative deviations to ideality caused by the establishment of stronger interactions in the mixture than in the pure DES precursors. This work tested thymol and menthol as hydrogen bond donors when combined with different flavonoids. Negative deviations from ideality were observed upon mixing thymol with either flavone or flavanone, two parent flavonoids that only have hydrogen bond acceptor (HBA) groups, thus forming non-ionic DES (Type V). On the other hand, the menthol systems with the same compounds generally showed positive deviatio

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23

Wegner, Wojciech, and Karol J. Fijalkowski. "Synthesis Method of Unsolvated Organic Derivatives of Metal Borohydrides." Materials 15, no. 23 (2022): 8653. http://dx.doi.org/10.3390/ma15238653.

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A new, scalable, wet-chemistry single-pot method of synthesising pure unsolvated organic derivatives of metal borohydrides is presented. The metathetic reaction in a weakly coordinating solvent is exemplified by the synthesis of [(n-C4H9)4N][Y(BH4)4] and [Ph4P][Y(BH4)4] systems. For the latter compound, the crystal structure was solved and described. Organic borohydride salts obtained by the new method can find various applications, e.g., can be used as precursors in synthesis of hydrogen-rich mixed-metal borohydrides—promising materials for solid-state chemical storage of hydrogen.

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Jandera, Pavel, Tomáš Hájek, and Marie Růžičková. "Retention Models on Core–Shell Columns." Journal of AOAC INTERNATIONAL 100, no. 6 (2017): 1636–46. http://dx.doi.org/10.5740/jaoacint.17-0233.

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Abstract A thin, active shell layer on core–shell columns provides high efficiency in HPLC at moderately high pressures. We revisited three models of mobile phase effects on retention for core–shell columns in mixed aqueous–organic mobile phases: linear solvent strength and Snyder–Soczewiński two-parameter models and a three-parameter model. For some compounds, two-parameter models show minor deviations from linearity due to neglect of possible minor retention in pure weak solvent, which is compensated for in the three-parameter model, which does not explicitly assume either the adsorption or

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25

Alston, R. B., G. P. Kokolis, and C. F. James. "CO2 Minimum Miscibility Pressure: A Correlation for Impure CO2 Streams and Live Oil Systems." Society of Petroleum Engineers Journal 25, no. 02 (1985): 268–74. http://dx.doi.org/10.2118/11959-pa.

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Abstract This paper presents an empirically derived correlation for estimating the minimum pressure required for multicontact miscible (MCM) displacement of live oil systems by pure or impure CO2 streams. Minimum miscibility pressure (MMP) has been correlated with temperature, oil C5+ molecular weight, volatile oil fraction, intermediate oil fraction, and composition of the CO2 stream. The effects of temperature and oil C5+ molecular weight on pure CO2 MMP have been well documented. However, CO2 sources are rarely pure, and solution gas usually is present in reservoir oils. The correlation pre

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Moine, Edouard, Romain Privat, Jean-Noël Jaubert, et al. "Can we safely predict solvation Gibbs energies of pure and mixed solutes with a cubic equation of state?" Pure and Applied Chemistry 91, no. 8 (2019): 1295–307. http://dx.doi.org/10.1515/pac-2018-1112.

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Abstract Solvation Gibbs energies are basically defined as a chemical potential change when transferring a fixed molecule from a perfect gas to a real liquid mixture. This quantity is of special interest for many practical applications as it quantifies the degree of affinity of a solute for its solvent. Few methods are currently available in the literature for the prediction of solvation Gibbs energies. In this article, a new approach is proposed: the use of a predictive cubic equation of state (EoS). The UMR-PRU (Universal Mixing Rule Peng-Robinson UNIFAC) EoS has been selected for its known

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27

Lahooti-Fard, Farzad, Mohammad Imani, and Ali Akbar Yousefi. "Solvent-dependent rheological behavior of concentrated solutions of a cationic acrylic terpolymer containing self-assembled chains." e-Polymers 15, no. 4 (2015): 279–83. http://dx.doi.org/10.1515/epoly-2015-0057.

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AbstractIt has been proved that alcohol molecules exist as cyclic and chain aggregates of different sizes in pure or mixed solvent systems. Here, it will be shown that these aggregates can radically change the rheological properties of a concentrated polymer solution containing self-assembled chains. In a previous study by the same authors, the existence of self-assembled structures in dilute solution of poly(dimethylaminoethyl methacrylate-co-methyl methacrylate-co-butyl methacrylate) in an alcoholic solvent mixture was shown according to small angle X-ray scattering results, showing that the

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28

Zhang, Xin, and Min Wang. "Effects of Emulsion Electrospinning Parameters on the Morphology and Structure of Core-Shell Structured PLLA Fibers." Advanced Materials Research 410 (November 2011): 386–89. http://dx.doi.org/10.4028/www.scientific.net/amr.410.386.

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Electrospinning is a popular technique for producing micro-or nanofibers for diverse applications including filtration, catalysis, sensors, cosmetics, wound dressing and tissue engineering. In some applications such as controlled drug/biomolecule delivery, core-shell structured nanofibers are desired. There are two major electrospinning processes for making core-shell structured fibers: emulsion electrospinning and coaxial electrospinning. In this study, the formation of core-shell structured fibers of poly (L-lactic acid) (PLLA) through emulsion electrospinning was investigated. To study the

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29

Christy, Francis A., Priyanka A. Shah, Jaivik V. Shah, Bijal A. Shah, and Pranav S. Shrivastav. "Conductometric studies on complexation of Ag+ cation by C-thiophene calix[4]resorcinarene in pure and mixed non-aqueous solvent systems." Journal of Inclusion Phenomena and Macrocyclic Chemistry 83, no. 3-4 (2015): 343–53. http://dx.doi.org/10.1007/s10847-015-0570-3.

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Przybyłek, Maciej, Tomasz Jeliński, Magdalena Mianowana, Kinga Misiak, and Piotr Cysewski. "Exploring the Solubility Limits of Edaravone in Neat Solvents and Binary Mixtures: Experimental and Machine Learning Study." Molecules 28, no. 19 (2023): 6877. http://dx.doi.org/10.3390/molecules28196877.

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This study explores the edaravone solubility space encompassing both neat and binary dissolution media. Efforts were made to reveal the inherent concentration limits of common pure and mixed solvents. For this purpose, the published solubility data of the title drug were scrupulously inspected and cured, which made the dataset consistent and coherent. However, the lack of some important types of solvents in the collection called for an extension of the available pool of edaravone solubility data. Hence, new measurements were performed to collect edaravone solubility values in polar non-protic

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Gudelj, Martina, Paola Šurina, Lucija Jurko, Ante Prkić, and Perica Bošković. "The Additive Influence of Propane-1,2-Diol on SDS Micellar Structure and Properties." Molecules 26, no. 12 (2021): 3773. http://dx.doi.org/10.3390/molecules26123773.

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Micellar systems are colloids with significant properties for pharmaceutical and food applications. They can be used to formulate thermodynamically stable mixtures to solubilize hydrophobic food-related substances. Furthermore, micellar formation is a complex process in which a variety of intermolecular interactions determine the course of formation and most important are the hydrophobic and hydrophilic interactions between surfactant–solvent and solvent–solvent. Glycols are organic compounds that belong to the group of alcohols. Among them, propane-1,2-diol (PG) is a substance commonly used a

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Bao, Shuqin, Ningning Sun, Wei Sun, et al. "Determination and analysis of solubility of 5-bromo-7-azaindole in pure and mixed solvent systems at different temperatures (T = 278.15–323.15 K)." Journal of Molecular Liquids 367 (December 2022): 120476. http://dx.doi.org/10.1016/j.molliq.2022.120476.

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Chen, Xiaofeng, Xiaofang Gong, Juan Xu, Peng Li, Huiping Wang, and Lifeng Ning. "Measurement and Correlation of the Solubility of Etonogestrel in Ten Pure and Binary Mixed Solvent Systems at Temperatures from 273.15 to 323.15 K." Journal of Chemical & Engineering Data 65, no. 6 (2020): 3190–202. http://dx.doi.org/10.1021/acs.jced.0c00201.

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34

Friess, Karel, Pavel Izák, Magda Kárászová, et al. "A Review on Ionic Liquid Gas Separation Membranes." Membranes 11, no. 2 (2021): 97. http://dx.doi.org/10.3390/membranes11020097.

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Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane mater

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Garbiec, Ewa, Natalia Rosiak, Ewa Tykarska, Przemysław Zalewski, and Judyta Cielecka-Piontek. "Sinapic Acid Co-Amorphous Systems with Amino Acids for Improved Solubility and Antioxidant Activity." International Journal of Molecular Sciences 24, no. 6 (2023): 5533. http://dx.doi.org/10.3390/ijms24065533.

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The objective of this study was to obtain co-amorphous systems of poorly soluble sinapic acid using amino acids as co-formers. In order to assess the probability of the interaction of amino acids, namely, arginine, histidine, lysine, tryptophan, and proline, selected as co-formers in the amorphization of sinapic acid, in silico studies were carried out. Sinapic acid systems with amino acids in a molar ratio of 1:1 and 1:2 were obtained using ball milling, solvent evaporation, and freeze drying techniques. X-ray powder diffraction results confirmed the loss of crystallinity of sinapic acid and

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Alam, Md Sayem, Baskar Ashokkumar, and A. Mohammed Siddiq. "The density, dynamic viscosity and kinematic viscosity of protic and aprotic polar solvent (pure and mixed) systems: An experimental and theoretical insight of thermophysical properties." Journal of Molecular Liquids 281 (May 2019): 584–97. http://dx.doi.org/10.1016/j.molliq.2019.02.097.

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Villanueva-Bermejo, David, Guillermo Reglero, Roumiana P. Stateva, and Tiziana Fornari. "Solubility of Bioactive Substances in Ethyl Lactate + Water Mixtures: Ferulic Acid and Caffeine." Open Chemical Engineering Journal 10, no. 1 (2016): 50–58. http://dx.doi.org/10.2174/1874123101610010050.

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The solubility of ferulic acid in ethyl lactate + water mixtures was measured at ambient temperature and pressure, and reported for the first time in this work. It was demonstrated that the acid solubility in the respective mixed solvents was considerably higher than in either pure ethyl lactate or water. Similar behavior pattern was recently reported by the authors for the solubility of caffeine in ethyl lactate + water mixtures. UNIQUAC and modified UNIFAC (Dortmund) were applied to represent the solubility of ferulic acid and caffeine in the mixed solvents and their capabilities to describe

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Endalew, Kebede Berkessa* Dejene Disasa O. P. Yadav. "DETERMINATION OF PHYSICO-CHEMICAL PARAMETERS OF SURFACTANTS IN THE PRESENCE OF UREA AT DIFFERENT TEMPERATURES." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 7 (2016): 987–1005. https://doi.org/10.5281/zenodo.57975.

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Surface physico-chemical and thermodynamic parameters of some aqueous surfactant solutions were studied using conductance, surface tension and dye spectroscopic techniques. From conductivity and absorbance measurements, critical micelle concentration(CMC),counter-ion association constant(α), surface excess concentration (G<sub>max</sub>), surface pressure at CMC (p<sub>cmc</sub>) and thermodynamic parameters of micellization (∆G<sup>o</sup><sub>mic</sub>, ∆H<sup>o</sup><sub>mic</sub>, ∆S<sup>o</sup><sub>mic</sub>) were determined and compared with the literature values for anionic (sodiu

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Serhieieva, Yevheniia, Anton Zakharov, and Sergey Kiyko. "Peculiarities of solvatochromism of 4-[[(2,4-dinitrophenyl)methylene]imino-2,6-diphenyl]phenol and Reichardt’s dye. DFT calculations." Kharkov University Bulletin Chemical Series, no. 38 (June 14, 2022): 23–30. http://dx.doi.org/10.26565/2220-637x-2022-38-03.

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One of the current directions of development of modern physical chemistry is the working out of sensor devices and molecular probes for the study of various properties of solutions, colloidal systems and biological objects. The latter include solvatochromic dyes, which, thanks to Reichardt's classic works, have found wide application for quantitative assessment of the solvating ability of individual and, to a lesser extent, mixed solvents of various nature. The different behavior of Reichardt and 4-[[(2,4-dinitrophenyl)methylene]imino-2,6-diphenyl]phenol dyes in pure water and mixed water-orga

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Jiao, Jinqing, Tao Li, Guangwen Zhang, et al. "Molecular Dynamics Simulations of the Short-Chain Fluorocarbon Surfactant PFHXA and the Anionic Surfactant SDS at the Air/Water Interface." Molecules 29, no. 7 (2024): 1606. http://dx.doi.org/10.3390/molecules29071606.

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The research and development of alternatives to long-chain fluorocarbon surfactants are desperately needed because they are extremely toxic, difficult to break down, seriously harm the environment, and limit the use of conventional aqueous film-forming foam fire extinguishing agents. In this study, mixed surfactant systems containing the short-chain fluorocarbon surfactant perfluorohexanoic acid (PFHXA) and the hydrocarbon surfactant sodium dodecyl sulfate (SDS) were investigated by molecular dynamics simulation to investigate the microscopic properties at the air/water interface at different

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Alam, Md Sayem, Baskar Ashokkumar, and A. Mohammed Siddiq. "The density, dynamic viscosity and kinematic viscosity of protic polar solvents (pure and mixed systems) studies: A theoretical insight of thermophysical properties." Journal of Molecular Liquids 251 (February 2018): 458–69. http://dx.doi.org/10.1016/j.molliq.2017.12.089.

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Kaushal, Deepika, Dilbag S. Rana, Manish Kumar, et al. "Furosemide–Cetyltrimethylammonium Bromide Interactions in Aqueous Dimethylsulfoxide Solutions: Physico–Chemical Studies." Zeitschrift für Physikalische Chemie 233, no. 3 (2019): 413–30. http://dx.doi.org/10.1515/zpch-2017-1014.

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Abstract Interaction of a cardiovascular drug, Furosemide with cetyltrimethylammonium bromide (CTAB) has been studied in aqueous solutions of Dimethylsulfoxide (DMSO) with the help of density, speed of sound and conductivity measurements over a range of temperatures 293.15–313.15 K at interval of 5 K. The interaction parameters viz. apparent molar volume, Vϕ and apparent molar isentropic compression, κs,ϕ have been enumerated from density and speed of sound data. Also, variation in the micellization behavior has been explored by calculating critical micelle concentration, CMC. It has been obse

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Shua'ab, Abbas Khalaf Mohammed. "Drag Reducing Flow of water in forced closed loop circulation system by using Sodium dodecyl sulfate additive." Kufa Journal of Engineering 4, no. 1 (2014): 97–112. http://dx.doi.org/10.30572/2018/kje/411254.

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The turbulent flow friction of a water solution with a small amount of surfactant additive is dramatically reduced when compared to that of pure water. This effect offers a significant reduction in pumping power and energy consumption. Commercial implementation of drag reducing fluids have proved successful for oil pipeline transportation, district heating and cooling systems, fire fighting, sewer throughput, jet cutting, etc. The investigation was carried out on a facility with a forced closed loop for pressure drop measurements. A type of anionic surfactant (Sodium dodecyl sulfate) mixed wit

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Rub, Malik Abdul, Naved Azum, Dileep Kumar, et al. "Investigation of Solution Behavior of Antidepressant Imipramine Hydrochloride Drug and Non-Ionic Surfactant Mixture: Experimental and Theoretical Study." Polymers 13, no. 22 (2021): 4025. http://dx.doi.org/10.3390/polym13224025.

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In this paper, the interaction of imipramine hydrochloride (IMP, antidepressant drug) and a non-ionic surfactant Triton X-100 (TX-100) mixture in five different ratios through the tensiometric method in different solvents (aqueous/0.050 mol·kg−1 aqueous NaCl/0.250 mol·kg−1 aqueous urea (U)) were examined thoroughly at a temperature of 298 K. UV–Visible studies in an aqueous system of IMP + TX-100 mixtures were also investigated and discussed in detail. The pure (IMP and TX-100) along with the mixtures’ critical micelle concentration (cmc) were assessed by a tensiometric technique. The obtained

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Gao, Ming, Yuanlu Zhu, Jiangyi Yan, Weixing Wu, and Beifu Wang. "Micromechanism Study of Molecular Compatibility of PVDF/PEI Blend Membrane." Membranes 12, no. 8 (2022): 809. http://dx.doi.org/10.3390/membranes12080809.

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In this paper, the compatibility of polyetherimide (PEI) with different contents as a high-performance copolymer and polyvinylidene fluoride (PVDF) was studied, and 5%–20% PEI was prepared by the non-solvent-induced phase inversion method. The compatibility of PVDF and PEI was evaluated by analyzing the physical structure and properties of the blend membrane, the microstructure, the glass transition temperature Tg, the enthalpy, and the mechanism of the polymer blend enthalpy change. The results show that the blend membranes have -NH and C=O-N binding energies at X-ray photoelectron spectrosco

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Son, Youhyun, Gustav Åvall, Guillermo Alvarez Ferrero, Annica Freytag, Knut Janßen, and Philipp Adelhelm. "From Ternary to Quatenary Graphite Intercalation Compound in Na-Ion Batteries." ECS Meeting Abstracts MA2024-02, no. 9 (2024): 1295. https://doi.org/10.1149/ma2024-0291295mtgabs.

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Sodium-ion batteries (SIBs) have emerged alongside the prominence of lithium-ion batteries (LIBs), capturing significant attention. By sharing chemical similarities with LIBs, SIBs have experienced notable growth, not only in research but also in industrial applications throughout 2023, particularly in the development of large-scale battery systems.[1] Graphite, a common anode material in LIBs, has unfavorable thermodynamic properties that limit the formation of binary graphite intercalation compounds (b-GICs). Consequently, this results in a poor specific capacity of approximately 20 mA h g-1

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Actis, Arianna, Francesca Sacchi, Christos Takidis, Maria Cristina Paganini, and Erik Cerrato. "Changes in Structural, Morphological and Optical Features of Differently Synthetized C3N4-ZnO Heterostructures: An Experimental Approach." Inorganics 10, no. 8 (2022): 119. http://dx.doi.org/10.3390/inorganics10080119.

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C3N4 is an innovative material that has had huge success as a photocatalyst in recent years. More recently, it has been coupled to robust metal oxides to obtain more stable materials. This work is focused on the different synthesis techniques used to prepare bare C3N4 and combined C3N4/ZnO mixed systems. Different precursors, such as pure melamine and cyanuric acid-based supramolecular complexes, were employed for the preparation of the C3N4 material. Moreover, different solvents were also used, demonstrating that the use of water leads to the formation of a more stable heterojunction. Structu

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Acree, William E. "Comments on “The density, dynamic viscosity and kinematic viscosity of protic and aprotic polar solvents (pure and mixed) systems: An experimental and theoretical insight of thermophysical properties”." Journal of Molecular Liquids 283 (June 2019): 299–301. http://dx.doi.org/10.1016/j.molliq.2019.03.081.

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Shenoy, Sulakshana, Mohsen M. Farahat, Chitiphon Chuaicham, Karthikeyan Sekar, Boopathy Ramasamy, and Keiko Sasaki. "Mixed-Phase Fe2O3 Derived from Natural Hematite Ores/C3N4 Z-Scheme Photocatalyst for Ofloxacin Removal." Catalysts 13, no. 5 (2023): 792. http://dx.doi.org/10.3390/catal13050792.

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Abatement of pharmaceutical pollutants from aquatic systems is crucial but remains a challenge. Semiconductor photocatalysis has emerged as an eco-friendly technique that utilizes renewable solar energy to address environmental issues. Naturally occurring and earth abundant hematite (Fe2O3) ores can be incorporated as a suitable component of a photocatalyst. Herein, Brazilian hematite was partially phase transformed into heterophase (consisting of α/γ-Fe2O3) by a simple single-stage heat treatment procedure. The method of synthesis was simple and economical, requiring neither solvents nor conc

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Marín, Sabrina, Mayra Cortés, Mauricio Acosta, et al. "From Laboratory towards Industrial Operation: Biomarkers for Acidophilic Metabolic Activity in Bioleaching Systems." Genes 12, no. 4 (2021): 474. http://dx.doi.org/10.3390/genes12040474.

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In the actual mining scenario, copper bioleaching, mainly raw mined material known as run-of-mine (ROM) copper bioleaching, is the best alternative for the treatment of marginal resources that are not currently considered part of the profitable reserves because of the cost associated with leading technologies in copper extraction. It is foreseen that bioleaching will play a complementary role in either concentration—as it does in Minera Escondida Ltd. (MEL)—or chloride main leaching plants. In that way, it will be possible to maximize mines with installed solvent-extraction and electrowinning

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