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Journal articles on the topic 'Non aqueous solvent'

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1

Palvanov, Narbek Sapaevich, and Adolat Farkhadovna Tillayeva. "Electrometric determination of cu (ii) cations, Zn (ii) and Cr (iii) in aqueous, water-non-aqueous and mixed solutions." American Journal Of Biomedical Science & Pharmaceutical Innovation 5, no. 2 (2025): 29–33. https://doi.org/10.37547/ajbspi/volume05issue02-08.

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This work presents the results of the potentiometric determination of aqueous, non-aqueous and mixed solvents of copper (II), zinc (II) and chromium (III) cations: (propanol-2, acetone, methyl ethyl ketone, toluene, carbon tetrachloride, dimethylformamide) and their mixtures with water in a ratio of 1:1 and 1:19 by volume, the ratios of acid-base titrations are given. The quantitative results of the titration on a per kilote basis for the indicated cations Cu2+, Zn2+ and Cr3+ are based on the acidity constants of these cations assessed in the solvent environment specified above. The influence
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2

Roux, Denis C. D., Isabelle Jeacomine, Guillaume Maîtrejean, François Caton, and Marguerite Rinaudo. "Characterization of Agarose Gels in Solvent and Non-Solvent Media." Polymers 15, no. 9 (2023): 2162. http://dx.doi.org/10.3390/polym15092162.

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Agarose is known to form a homogeneous thermoreversible gel in an aqueous medium over a critical polymer concentration. The solid-liquid phase transitions are thermoreversible but depend on the molecular structure of the agarose sample tested. The literature has mentioned that agarose gels could remain stable in non-solvents such as acetone or ethanol. However, there has been no characterization of their behavior nor a comparison with the gels formed in a good solvent such as water. In the first step of this article, the structure was characterized using 1H and 13C NMR in both D2O and DMSO-d6
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3

Hemdan, Sokaina, and Radwan Alnajjar. "The non-ideality in binary aqueous systems contributed to the different abilities of solvent entities incorporated in the solvation shell of methylene blue." Journal of the Serbian Chemical Society, no. 00 (2023): 87. http://dx.doi.org/10.2298/jsc230512087h.

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The solvatochromic properties of methylene blue (MB) were investigated in neat water, methanol, ethanol, propanol, dioxane, and their corresponding aqueous mixtures. The correlation of the empirical solvent polarity scale (ET) values of MB with solvent composition was analyzed using the solvent exchange model of Bosch and Roses to explain the preferential solvation of the probe thiazine dye in the binary mixed solvents. Non-linear solvatochromism of MB was observed in aqueous mixtures of methanol, ethanol, propanol, and dioxane. The influence of the composition of the solvating shell in prefer
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4

Harvey, Jacob A., Charles J. Pearce, Morgan G. Hall, Eric J. Bruni, Jared B. DeCoste, and Dorina F. Sava Gallis. "Insights into the solvent-assisted degradation of organophosphorus compounds by a Zr-based metal–organic framework." Dalton Transactions 48, no. 43 (2019): 16153–57. http://dx.doi.org/10.1039/c9dt03710a.

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5

Devi, Parvesh, Sushila Singh, Seema Sangwan, and Sheetal Monika Moond. "Effect of various solvent fractions on antioxidant potential of glycyrrhiza glabraL. (Mulhatti) Roots." Journal of Agriculture, Science and Technology 21, no. 2 (2022): 44–54. http://dx.doi.org/10.4314/jagst.v21i2.4.

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The effect of widely used methods and solvents on the antioxidant activity of Mulhatti root has been studied. The dry powder of Mulhatti root is extracted in methanol and by liquid-liquid separation of different solvent fractions, namely dichloromethane (DCM), ethyl acetate (EA), n-butanol (nB), residual aqueous solution (RA) and non-aqueous (NAR) residues were prepared. The antioxidant activity of all the different solvent fractions of Mulhatti root was evaluated using antioxidant assays such as the 2,2 diphenyl-1-picryl hydrazyl free radical scavenger assay and the total antioxidant activity
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6

Gull, Maheen, Tian Feng, Benjamin Smith, Laurent Calcul, and Matthew A. Pasek. "Prebiotic Syntheses of Organophosphorus Compounds from Reduced Source of Phosphorus in Non-Aqueous Solvents." Life 13, no. 11 (2023): 2134. http://dx.doi.org/10.3390/life13112134.

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Reduced-oxidation-state phosphorus (reduced P, hereafter) compounds were likely available on the early Earth via meteorites or through various geologic processes. Due to their reactivity and high solubility, these compounds could have played a significant role in the origin of various organophosphorus compounds of biochemical significance. In the present work, we study the reactions between reduced P compounds and their oxidation products, with the three nucleosides (uridine, adenosine, and cytidine), with organic alcohols (glycerol and ethanolamine), and with the tertiary ammonium organic com
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7

Migliozzi, Simona, Giovanni Meridiano, Panagiota Angeli, and Luca Mazzei. "Investigation of the swollen state of Carbopol molecules in non-aqueous solvents through rheological characterization." Soft Matter 16, no. 42 (2020): 9799–815. http://dx.doi.org/10.1039/d0sm01196g.

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Swelling of Carbopol particles depends on the ionization degree induced by the solvent. In co-solvents, the one with the greatest permeability preferentially penetrates the network yielding the same final dimension obtained with that solvent alone.
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8

Alaei, Zahra, Beatrice Cattoz, Peter John Dowding, and Peter Charles Griffiths. "Solvent Relaxation NMR as a Tool to Study Particle Dispersions in Non-Aqueous Systems." Physchem 2, no. 3 (2022): 224–34. http://dx.doi.org/10.3390/physchem2030016.

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The determination of the NMR spin–spin relaxation rate of water in (purely) aqueous particulate dispersions has been shown to be a convenient and facile experimental approach to probing the composition of near particle surface structures. Here, a systematic study has been undertaken of both non-aqueous and mixed aqueous–non-aqueous solvent particulate dispersions to explore the universality of the solvent relaxation technique. As in the aqueous case, a linear relationship between the surface area present and the solvent relaxation rate is observed, confirming the rapid exchange of the solvent
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9

De Silva, Umanga, Jordyn Janusz, Ben Jones, and Jamie A. Stull. "Understanding Solubility: Zirconium Electrodeposition in Non-Aqueous Electrolytes." ECS Meeting Abstracts MA2024-02, no. 22 (2024): 1935. https://doi.org/10.1149/ma2024-02221935mtgabs.

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Non-aqueous electrodeposition entails the process of depositing metals or materials onto electrodes using a solvent or electrolyte that isn't water-based. Researchers have been exploring various techniques such as molten salt, ionic liquids, organic solvents, and deep eutectic solvents for non-aqueous electrodeposition in order to obtain zirconium metal deposition. Our team has directed its attention towards deep eutectic solvents due to their increasing recognition as environmentally sustainable solvents. These solvents boast unique physical and chemical properties, effective dispersal capabi
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10

Roux, Denis C. D., François Caton, Isabelle Jeacomine, Guillaume Maîtrejean, and Marguerite Rinaudo. "Reversibility in the Physical Properties of Agarose Gels following an Exchange in Solvent and Non-Solvent." Polymers 16, no. 6 (2024): 811. http://dx.doi.org/10.3390/polym16060811.

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Agarose forms a homogeneous thermoreversible gel in an aqueous solvent above a critical polymer concentration. Contrary to the prevailing consensus, recent confirmations indicate that agarose gels are also stable in non-solvents like acetone and ethanol. A previous study compared gel characterisations and behaviours in water and ethanol, discussing the gelation mechanism. In the current work, the ethanol gel is exchanged with water to explore the potential reversibility of the displacement of water in agarose. Initially, the structure is characterised using 1H NMR in DMSO-d6 and D2O solvents.
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11

Vaishali, R. Patil, and P. Deohate Pradip. "The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method." Journal of Indian Chemical Society Vol. 90, Sep 2013 (2013): 1379–82. https://doi.org/10.5281/zenodo.5789139.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001,Maharashtra, India <em>E-mail </em>: pradip22209l@yahoo.co.in <em>Manuscript received online 05 December 2012, revised 26 December 2012, accepted 30 December 2012</em> The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant has been established. The study of effect of solvent and concentration on potentiometric determination of ibuprofen has been carried out followed
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12

Perkins, Mark J., Leslie P. Silva, and Vaughan S. Langford. "Evaluation of Solvent Compatibilities for Headspace-SIFT-MS Analysis of Pharmaceutical Products." Analytica 4, no. 3 (2023): 313–35. http://dx.doi.org/10.3390/analytica4030024.

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Procedures for determination of the residual solvent and volatile impurity content in pharmaceutical products usually rely on dissolution in a solvent, followed by headspace-gas chromatography (HS-GC) analysis. Whereas chromatographic systems can utilize a wide variety of solvents, direct-injection mass spectrometry (DIMS) techniques have fewer solvent options, because elimination of the chromatographic column means that the instrument is more susceptible to saturation. Since water has the lowest impact, it has almost always been the default solvent for DIMS. In this study, selected ion flow t
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13

Nettleton, G. S., and W. G. McAuliffe. "A histological comparison of phase-partition fixation with fixation in aqueous solutions." Journal of Histochemistry & Cytochemistry 34, no. 6 (1986): 795–800. http://dx.doi.org/10.1177/34.6.3084627.

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In phase-partition fixation, tissue is immersed in a non-aqueous solvent at equilibrium with an aqueous solution of a fixing agent to minimize osmotic effects. Preservation of morphology afforded by phase-partition fixation using formalin and glutaraldehyde and several organic solvents was compared to aqueous 10% neutral buffered formalin fixation for five tissues. It was shown that phase-partition fixation can provide excellent fixation for light microscopy if the proper combinations of fixatives and solvents are used.
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14

Ma, Jiayun, Luyao Wang, Yan Chu, Yitong Wang, Kequan Chen, and Hui Li. "Recent Progress in Non-Aqueous Biocatalysis of Immobilized Enzymes." Processes 12, no. 8 (2024): 1571. http://dx.doi.org/10.3390/pr12081571.

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Non-aqueous biocatalysis has attracted broad interest recently due to its differences from traditional aqueous catalysis and increased substrate solubility, which reduces feedback inhibition, improving enantiomer selectivity and completing synthesis reactions that cannot be performed in an aqueous solution. This approach shows remarkable application value in producing natural products, chemical products, pharmaceutical intermediates, and foods. This study aims to provide a concise overview of the current state of non-aqueous biocatalysis and its sustainability, summarizing the mechanism of non
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15

Pradip, P. Deohate. "Non-aqueous potentiometric determination of pharmaceutically potent drug diphenhydramine hydrochloride." Journal of Indian Chemical Society Vol. 94, Nov 2017 (2017): 1239–42. https://doi.org/10.5281/zenodo.5636064.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001, Maharashtra, India <em>E-mail</em> : pradip222091@yahoo.co.in <em>Manuscript received 19 July 2017, revised 06 November 2017, accepted 13 November 2017</em> The non-aqueous potentiometric determination of pharmaceutically potent drug diphenhydramine hydrochloride by performing the titrations using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant has been carried out. The effect of solvent and concentration on potentiometric determination of this drug has been studied f
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16

Fillingham, Ryan, Matthew Boon, Shaghraf Javaid, J. Alex Saunders, and Franca Jones. "Barium sulfate crystallization in non-aqueous solvent." CrystEngComm 23, no. 11 (2021): 2249–61. http://dx.doi.org/10.1039/d0ce01664k.

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17

Lail, Marty, Jak Tanthana, and Luke Coleman. "Non-Aqueous Solvent (NAS) CO2 Capture Process." Energy Procedia 63 (2014): 580–94. http://dx.doi.org/10.1016/j.egypro.2014.11.063.

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18

Wijaya, Emmy C., Frances Separovic, Calum J. Drummond, and Tamar L. Greaves. "Micelle formation of a non-ionic surfactant in non-aqueous molecular solvents and protic ionic liquids (PILs)." Physical Chemistry Chemical Physics 18, no. 35 (2016): 24377–86. http://dx.doi.org/10.1039/c6cp03332f.

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Micelle formation of a non-ionic amphiphile, C<sub>12</sub>E<sub>6</sub>, was investigated in a diverse range of molecular solvents and protic ionic liquids (PILs). A link between the solvent cohesive energy density and the free energy of micellization was discussed.
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19

Kassim, Mohd Azlan, Nor Afifah Sulaiman, Rozita Yusoff, and Mohamed Kheireddine Aroua. "Non-Aqueous Solvent Mixtures for CO2 Capture: Choline Hydroxide-Based Deep Eutectic Solvents Absorbent Performance at Various Temperatures and Pressures." Sustainability 15, no. 12 (2023): 9191. http://dx.doi.org/10.3390/su15129191.

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Carbon dioxide (CO2) absorption in a non-aqueous solution is a potential technology for reducing greenhouse gas emissions. In this study, a non-aqueous solvent, sulfolane and dimethylsulfoxide (DMSO), was functionalized with a deep eutectic solvent (DES) consisting of choline hydroxide and polyamines diethylenetriamine (DETA) and triethylenetetramine (TETA). The non-aqueous absorbents’ CO2 absorption ability was investigated in a high-pressure absorption reactor with a variable absorption temperature (303.15–333.15 K) and pressure (350–1400 kPa). The results showed that 2M ChOH:TETA−DMSO solut
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20

Papadakis, Raffaello. "Chromotropism of Iron(II) Complexes with Non-Symmetric Heterocyclic Ligands: Polarity Sensing in Aqueous Urea Solutions." Nanomaterials 15, no. 8 (2025): 598. https://doi.org/10.3390/nano15080598.

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This study reports the synthesis and characterization of two solvatochromic pentacyanoferrate(II) complexes. Their structural design incorporates ligands with flexible xylylene bridges and distinct heterocycles—one combining 4-dimethylaminopyridine (DMAP) with 4,4′-bipyridine, and the other isoquinoline with 4,4′-bipyridine. Their structural diversity enables the complexes to engage in a broad range of solvent–solute interactions, providing valuable insights into the behavior of solvents and media with regard to polarity, through sizable solvatochromic shifts. Their solvatochromism is examined
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21

Alguacil, E. J., and M. Alonso. "Recovery of Cu(II) from diluted aqueous solutions by non-dispersive solvent extraction." Revista de Metalurgia 38, no. 4 (2002): 263–69. http://dx.doi.org/10.3989/revmetalm.2002.v38.i4.409.

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22

Delgado-Abad, Thais, Jaime Martínez-Ferrer, Javier Reig-López, et al. "On the ionizing properties of supercritical carbon dioxide: uncatalyzed electrophilic bromination of aromatics." RSC Adv. 4, no. 92 (2014): 51016–21. http://dx.doi.org/10.1039/c4ra10557e.

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scCO<sub>2</sub>, a non-polar solvent with a dielectric constant lower than n-pentane, promotes the electrophilic bromination of aromatics as efficiently as strongly ionizing solvents such as aqueous acetic and trifluoroacetic acids.
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23

Permadi, Adi, Lukhi Mulia Shitophyta, and Ibdal Satar. "One-step phase transferring method on preparing CuInS2/ZnS QDs dispersion via ultrasonic treatment for bioimaging." International Journal of Advances in Applied Sciences 13, no. 1 (2024): 73. http://dx.doi.org/10.11591/ijaas.v13.i1.pp73-83.

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Sonochemistry has many applications in biomedical engineering owing to its ability to break chemical bonds. It can also be used to facilitate the preparation of aqueous quantum dots (QDs) dispersions during microemulsion formati on. Cavitation, bubble growth and collapse during sonication facilitate the formation of microemulsions between a solvent and water. Sonication was employed in this study to prepare aqueous copper indium sulfide colloidal zinc sulfide (CuInS2/ZnS) QD dispersions using different solvent systems. The resultant QDs were characterized by UV-vis absorption, photoluminescenc
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24

Adi, Permadi, Mulia Shitophyta Lukhi, and Satar Ibdal. "One-step phase transferring method on preparing CuInS2/ZnS QDs dispersion via ultrasonic treatment for bioimaging." International Journal of Advances in Applied Sciences (IJAAS) 13, no. 1 (2024): 73–83. https://doi.org/10.11591/ijaas.v13.i1.pp73-83.

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Sonochemistry has many applications in biomedical engineering owing to its ability to break chemical bonds. It can also be used to facilitate the preparation of aqueous quantum dots (QDs) dispersions during microemulsion formati on. Cavitation, bubble growth, and collapse during sonication facilitate the formation of microemulsions between a solvent and water. Sonication was employed in this study to prepare aqueous copper indium sulfide colloidal zinc sulfide (CuInS2/ZnS) QD dispersions using different solvent systems. The resultant QDs were characterized by UV-vis absorption, photoluminescen
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25

Matthews, Lauren, Silvia Ruscigno, Sarah E. Rogers, et al. "Fracto-eutectogels: SDS fractal dendrites via counterion condensation in a deep eutectic solvent." Physical Chemistry Chemical Physics 23, no. 20 (2021): 11672–83. http://dx.doi.org/10.1039/d1cp01370j.

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Fracto-eutectogels comprising dendritic fractal aggregates of SDS surfactants in glyceline, a deep eutectic solvent, are observed for the first time, alluding to curious self-assembly mechanisms in such H-bonding rich, non-aqueous green solvents.
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26

Kassim, Mohd Azlan, Zhongyi Ho, Farihahusnah Hussin, and Mohamed Kheireddine Aroua. "Exploring Non-aqueous Solutions for CO2 Capture at Elevated Pressure: An Initial Study for EHA/MOR in DMSO Mixtures." E3S Web of Conferences 488 (2024): 03024. http://dx.doi.org/10.1051/e3sconf/202448803024.

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Carbon dioxide (CO2) absorption in a non-aqueous solution is a potential technology for reducing greenhouse gas emissions. In this study, a non-aqueous solvent, dimethylsulfoxide (DMSO), was blended with a amines The non-aqueous blended amines absorbents’ CO2 absorption ability was investigated in a high-pressure absorption reactor with a variable absorption pressure (350–1400 kPa) at constant temperature (303.15K). The results showed that 2M EHA in DMSO solution had the highest CO2 loading capacity (molCO2/molamine) when compared with 1M EHA + 1M MOR in DMSO solutions. It was also found that
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27

Pathak, Raghvendu. "Solvation enthalpy of uranium tetrachloride in aqueous-alcohols mixed solvents." Science Vision 17, no. 3 (2017): 122–27. http://dx.doi.org/10.33493/scivis.17.03.01.

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The process of interaction between ions of a solute and the molecules of the solvent through relatively weak covalent bonds is called solvation. It involves evening out a concentration gradient and evenly distributing the solute molecules within the solvent. Hydration is a special case of solvation when the solvent molecules are water. Solvation energy, generally, is the energy released when ions in crystal lattices associate with molecules in a solvent, however it can be positive or negative, depending upon the combined effects of lattice and hydration energies in case of aqueous-ionic solid
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28

Khalifa, M. A., A. M. Ismail, M. El-Batouti, and A. El-Hawaty. "kinetics of Aquation of Dichloro Tetrapyridine Ruthenium(Ii) Complex in Binary Aqueous Solvents." Journal of Chemical Research 2003, no. 1 (2003): 42–45. http://dx.doi.org/10.3184/030823403103172896.

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First-order solvolysis rates of trans-dichloro tetrapyridine ruthenium(II) have been measured UV spectrophoto metrically over a wide range of solvent compositions in temperature ranges(40–55°C) in water–2-propanol and water– t-butanol mixtures. The rate of solvolysis is faster in the former than in the latter. Plots of log (rate constant) versus the reciprocal of relative permitivity of the co-solvent gave a non-linear relation for both co-solvents, this non-linearity is derived from a large differential effect of solvent structure between the initial and transition states. Δ S# of activation
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29

Chen, Lu Yi, Xin Hui Ruan, Jian Gang Chen, Su Xin Xu, Yi Qi Yang, and Bi Jia Wang. "Recyclable Reactive Dyeing of Wool Fabrics in Environmental Friendly Non-Aqueous Medium for a more Sustainable Textile Industry." Key Engineering Materials 671 (November 2015): 78–87. http://dx.doi.org/10.4028/www.scientific.net/kem.671.78.

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Reactive dyeing of wool fabrics in non-aqueous green solvents was investigated with the aim to cut effluent discharge via dyebath reuse. Hydrolysis of reactive dyes is the major obstacle for recycle and reuse of the spent dye bath. In the current work, 10 non-nucleophilic solvents were screened based on their Environmental, health, and safety (EHS) profile to be used as the dyeing media. Dimethyl sulfoxide (DMSO) and dimethyl carbonate were chosen for their favorable EHS score. ATR-IR, SEM and XRD analysis had revealed DMSO pretreatment induced appreciable morphological and structural changes
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30

Zheng, Dong, Xiang-Ai Yuan, Haibo Ma, et al. "Unexpected solvent effects on the UV/Vis absorption spectra of o -cresol in toluene and benzene: in contrast with non-aromatic solvents." Royal Society Open Science 5, no. 3 (2018): 171928. http://dx.doi.org/10.1098/rsos.171928.

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Cresol is a prototype molecule in understanding intermolecular interactions in material and biological systems, because it offers different binding sites with various solvents and protonation states under different pH values. It is found that the UV/Vis absorption spectra of o -cresol in aromatic solvents (benzene, toluene) are characterized by a sharp peak, unlike the broad double-peaks in 11 non-aromatic solvents. Both molecular dynamics simulations and electronic structure calculations revealed the formation of intermolecular π-complexation between o -cresol and aromatic solvents. The therm
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31

Lu, Ping, Peizhuo Sun, Qiang Ma, et al. "Rationally Designed Ternary Deep Eutectic Solvent Enabling Higher Performance for Non-Aqueous Redox Flow Batteries." Processes 10, no. 4 (2022): 649. http://dx.doi.org/10.3390/pr10040649.

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Redox flow batteries hold promise as large-scale energy storage systems for off-grid electrification. The electrolyte is one of the key components of redox batteries. Inspired by the mechanism involved in solvents for extraction, a ternary deep eutectic solvent (DES) is demonstrated, in which glycerol is introduced into the original binary ethaline DES. Redox pairs (active substance) dissolved in the solvent have low charge transfer resistance. The results show that the viscosity of the solvent with the ratio of choline chloride to ethylene glycol to glycerol of 1:2:0.5 decreases from 51.2 mPa
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32

Scholl, Henryk, and Krzysztof Sochaj. "Cyclic voltammetry of some ferrocenephanes in non-aqueous solvents—II. Solvent effects." Electrochimica Acta 34, no. 7 (1989): 915–28. http://dx.doi.org/10.1016/0013-4686(89)80016-7.

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33

Urban, Raphael D., Tillmann G. Fischer, Ales Charvat, et al. "On-chip mass spectrometric analysis in non-polar solvents by liquid beam infrared matrix-assisted laser dispersion/ionization." Analytical and Bioanalytical Chemistry 413, no. 6 (2021): 1561–70. http://dx.doi.org/10.1007/s00216-020-03115-4.

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AbstractBy the on-chip integration of a droplet generator in front of an emitter tip, droplets of non-polar solvents are generated in a free jet of an aqueous matrix. When an IR laser irradiates this free liquid jet consisting of water as the continuous phase and the non-polar solvent as the dispersed droplet phase, the solutes in the droplets are ionized. This ionization at atmospheric pressure enables the mass spectrometric analysis of non-polar compounds with the aid of a surrounding aqueous matrix that absorbs IR light. This works both for non-polar solvents such as n-heptane and for water
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34

Chen, Mei, Tongtong Jin, Binbin Nian, and Wenjun Cheng. "Solvent Tolerance Improvement of Lipases Enhanced Their Applications: State of the Art." Molecules 29, no. 11 (2024): 2444. http://dx.doi.org/10.3390/molecules29112444.

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Lipases, crucial catalysts in biochemical synthesis, find extensive applications across industries such as food, medicine, and cosmetics. The efficiency of lipase-catalyzed reactions is significantly influenced by the choice of solvents. Polar organic solvents often result in a decrease, or even loss, of lipase activity. Conversely, nonpolar organic solvents induce excessive rigidity in lipases, thereby affecting their activity. While the advent of new solvents like ionic liquids and deep eutectic solvents has somewhat improved the activity and stability of lipases, it fails to address the fun
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35

Frasch, Duncan M., and Daniel R. Spiegel. "Experiments on tracer diffusion in aqueous and non-aqueous solvent combinations." Journal of Chemical Physics 141, no. 12 (2014): 124507. http://dx.doi.org/10.1063/1.4896303.

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36

Campanella, L., S. De Luca, G. Favero, L. Persi, and M. Tomassetti. "Superoxide dismutase biosensors working in non-aqueous solvent." Fresenius' Journal of Analytical Chemistry 369, no. 7-8 (2001): 594–600. http://dx.doi.org/10.1007/s002160000672.

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37

Xue-Kun, Xing, P. Abel, R. McIntyre, and D. Scherson. "The single crystal metal-non-aqueous solvent interface." Journal of Electroanalytical Chemistry and Interfacial Electrochemistry 216, no. 1-2 (1987): 261–71. http://dx.doi.org/10.1016/0022-0728(87)80212-7.

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38

Shoukat, Usman, Diego Pinto, and Hanna Knuutila. "Study of Various Aqueous and Non-Aqueous Amine Blends for Hydrogen Sulfide Removal from Natural Gas." Processes 7, no. 3 (2019): 160. http://dx.doi.org/10.3390/pr7030160.

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Various novel amine solutions both in aqueous and non-aqueous [monoethylene glycol (MEG)/triethylene glycol(TEG)] forms have been studied for hydrogen sulfide (H2S) absorption. The study was conducted in a custom build experimental setup at temperatures relevant to subsea operation conditions and atmospheric pressure. Liquid phase absorbed H2S, and amine concentrations were measured analytically to calculate H2S loading (mole of H2S/mole of amine). Maximum achieved H2S loadings as the function of pKa, gas partial pressure, temperature and amine concentration are presented. Effects of solvent t
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39

Pradip, P. Deohate. "Analysis of drug ofloxacin in bulk and single component pharmaceutical tablets by non-aqueous potentiometric titration method." Journal of Indian Chemical Society Vol. 95, May 2018 (2018): 559–62. https://doi.org/10.5281/zenodo.5642942.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001, Maharashtra, India E-mail: pradip222091@yahoo.co.in <em>Manuscript received 05 March 2018, accepted 04 April 2018</em> Analysis of drug ofloxacin in bulk and single component pharmaceutical tablets has been carried out by non-aqueous potentiometric titration method using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant. The effect of solvent and concentration on potentiometric analysis of drug ofloxacin as well as its analysis in bulk and single component pharmaceutica
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40

Ho, Junming. "Predicting pKa in Implicit Solvents: Current Status and Future Directions." Australian Journal of Chemistry 67, no. 10 (2014): 1441. http://dx.doi.org/10.1071/ch14040.

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Computational prediction of condensed phase acidity is a topic of much interest in the field today. We introduce the methods available for predicting gas phase acidity and pKas in aqueous and non-aqueous solvents including high-level electronic structure methods, empirical linear free energy relationships (LFERs), implicit solvent methods, explicit solvent statistical free energy methods, and hybrid implicit–explicit approaches. The focus of this paper is on implicit solvent methods, and we review recent developments including new electronic structure methods, cluster-continuum schemes for cal
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Peña, María Ángeles, Olga E. García-Serna, Darío A. Tinjacá, Daniel R. Delgado, and Fleming Martínez. "Preferential Solvation of Cyclosporin in Aqueous Mixtures of Some Polymeric Cosolvents." ImmunoAnalysis 4 (August 1, 2024): 5. http://dx.doi.org/10.34172/ia.4088.

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Background: Cyclosporin is a cyclic peptide-drug used as immunosuppressant for the prophylaxisof transplant rejection whose physicochemical properties in mixed aqueous solvent systems isstill not well understood. The preferential solvation parameters of cyclosporin in aqueous binarymixtures of diethylene glycol monoethyl ether (DEGME), polyethylene glycol 200 (PEG 200) andpolyethylene glycol 400 (PEG 400) were computed. Methods: Reported mole fraction solubilities of cyclosporin in DEGME-aqueous mixtures,PEG 200-aqueous mixtures, and PEG 400-aqueous mixtures were processed by following theinve
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Karolczak, Stefan, Hugh A. Gillis, Gerald B. Porter, and David C. Walker. "Solvent-dependent rate constants of muonium atom reactions." Canadian Journal of Chemistry 81, no. 2 (2003): 175–78. http://dx.doi.org/10.1139/v03-009.

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The rates of reaction of muonium atoms with solutes, ionic and organic, were studied in solvents of wildly differing polarities (water, methanol, and hexane) and their rate constants were compared, where possible. In these reactions — which are those of a highly reactive atom, an isotope of hydrogen — it transpires that the reaction rates are higher in solvents in which the solute is more soluble and muonium diffuses faster. This study leads to various kinetic-solvent-effect ratios and to the observation of the reaction of muonium with free radicals being among the fastest reactions recorded s
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Patel, Rakesh P., Kaushal P. Patel, Kushal A. Modi, and Chirayu J. Pathak. "Formulation, development and evaluation of injectable formulation of Aspirin." Drugs and Therapy Studies 3, no. 1 (2013): 2. http://dx.doi.org/10.4081/dts.2013.e2.

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The objective of this study was to develop and manufacture a stable parenteral formulation for Aspirin, a non steroidal anti-inflammatory agent. The solubility and stability of the drug was determined. Solubility studies suggested that Aspirin exhibited poor aqueous solubility but showed appreciable solubility in non-aqueous solvents. Based on the preformulation studies, a lyophilized parenteral formulation containing 25 mg/mL of Aspirin was prepared in a solvent system containing of 80% v/v water and 20% v/v polyethylene glycol-400 (PEG-400). Rubber closures, filter membranes, and liquid tran
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Domínguez de María, Pablo, Selin Kara, and Fabrice Gallou. "Biocatalysis in Water or in Non-Conventional Media? Adding the CO2 Production for the Debate." Molecules 28, no. 18 (2023): 6452. http://dx.doi.org/10.3390/molecules28186452.

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Biocatalysis can be applied in aqueous media and in different non-aqueous solutions (non-conventional media). Water is a safe solvent, yet many synthesis-wise interesting substrates cannot be dissolved in aqueous solutions, and thus low concentrations are often applied. Conversely, non-conventional media may enable higher substrate loadings but at the cost of using (fossil-based) organic solvents. This paper determines the CO2 production—expressed as kg CO2·kg product−1—of generic biotransformations in water and non-conventional media, assessing both the upstream and the downstream. The key to
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Aguda, Remil, Shayla LeBoeuf, Cody Stelly, et al. "The Potential of Non-Ionic Surfactants for Extraction of Lactic Acid from Aqueous Solution." Applied Sciences 10, no. 15 (2020): 5315. http://dx.doi.org/10.3390/app10155315.

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Lactic acid, an important commodity chemical for various applications, is mainly produced through fermentation. In this study, the potential of non-ionic surfactants (an alcohol ethoxylate (AE) and two alcohol alkoxylates (AAs)) as solvents for the extraction of lactic acid from aqueous solutions is reported for the first time. Ternary mixtures containing lactic acid, water, and surfactants were prepared for the assessment. The results indicated that for all the systems, the water–surfactant binary pair exhibits partial immiscibility. Furthermore, the results suggested that with respect to the
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Przybyłek, Maciej, Anna Kowalska, Natalia Tymorek, Tomasz Dziaman, and Piotr Cysewski. "Thermodynamic Characteristics of Phenacetin in Solid State and Saturated Solutions in Several Neat and Binary Solvents." Molecules 26, no. 13 (2021): 4078. http://dx.doi.org/10.3390/molecules26134078.

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The thermodynamic properties of phenacetin in solid state and in saturated conditions in neat and binary solvents were characterized based on differential scanning calorimetry and spectroscopic solubility measurements. The temperature-related heat capacity values measured for both the solid and melt states were provided and used for precise determination of the values for ideal solubility, fusion thermodynamic functions, and activity coefficients in the studied solutions. Factors affecting the accuracy of these values were discussed in terms of various models of specific heat capacity differen
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Elsherif, Khaled Muftah, Abdulfattah Mohamed Alkherraz, Hana Shawish, Salima Abajja, and Awatif Al-arbash. "Thermodynamic Studies of Co(II) Complexation with Schiff Base Ligands in Different Nonaqueous Solvents." Turkish Journal of Analytical Chemistry 7, no. 2 (2025): 71–78. https://doi.org/10.51435/turkjac.1606841.

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This study investigates the synthesis and characterization of two novel Schiff base ligands, L1 and L2, and their complexation behavior with Co(II) ions in non-aqueous media. Ligand L1 was synthesized using o-hydroxyacetophenone and salicylaldehyde with ethylenediamine, while L2 was prepared with 2,3-dihydroxybenzaldehyde and ethylenediamine. Conductometric measurements in ethanol, acetonitrile, and a 1:1 mixture of these solvents at temperatures ranging from 25°C to 40°C determined the stability constants of the Co(II) complexes. Results showed distinct temperature-dependent stability trends:
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Kaur, Manpreet. "Thermo Acoustic Parameters of Tetrabutylammonium Borate and Perchlorate in Non-Aqueous Solvents." Oriental Journal Of Chemistry 37, no. 3 (2021): 722–34. http://dx.doi.org/10.13005/ojc/370330.

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Interactions of electrolytes in a binary mixture can be determined by various techniques. Ultrasonic velocity measurements prove to be one of the important tools for measuring various acoustic properties at variable temperature. Thermo acoustic parameters like Isentropic compressibility (κs),Acoustic impedance (Z), Free volume (Vf), Absorption coefficient (Abscoeff), Intermolecular free length (Lf), Gibb’s free energy (ΔG), Relaxation time (τ), Rao’s constant (Rm), Internal pressure (πi), Wada’s constant (w), and Entropy (H) for Tetrabutylammonium tetraphenylborate (Bu4NBPh4) and Tetrabuty lam
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Minò, Antonio, Giuseppe Cinelli, Francesco Lopez, and Luigi Ambrosone. "Optical Behavior of Nile Red in Organic and Aqueous Media Environments." Applied Sciences 13, no. 1 (2023): 638. http://dx.doi.org/10.3390/app13010638.

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A simple model is proposed to calculate the dimerization constant of a dye in non-aqueous solvents. Alkan-1ols of the formula H–(CH2)n–OH are used to study the spectroscopic behavior of Nile Red dye. The number n varied from 1 to 8 to modulate the medium hydrophobicity. Generally, Nile red is used to localize lipid droplets within cells. This molecule is non-fluorescent in water and other polar solvents but undergoes fluorescence enhancement and large absorption and emission blue shifts in non-polar environments. The calculated equilibrium constants suggest that the aggregation process is solv
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Dwamena, Amos K. "Recent Advances in Hydrophobic Deep Eutectic Solvents for Extraction." Separations 6, no. 1 (2019): 9. http://dx.doi.org/10.3390/separations6010009.

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In the over 1,800 articles published since their inception in 2001, most deep eutectic solvents (DES) synthesized have been hydrophilic. The low cost, low toxicity, and bioavailability of DES make the solvent ‘green’ and sustainable for diverse applications. Conversely, the hydrophilicity of DES limits their practical application to only polar compounds, which is a major drawback of the solvent. For the past three years, hydrophobic deep eutectic solvents (HDES) have emerged as an alternative extractive media capable of extracting non-polar organic and inorganic molecules from aqueous environm
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