scholarly journals Efficacy of ionic liquids on the growth and simultaneous xylanase production by Sporotrichum thermophile: membrane integrity, composition and morphological investigation

RSC Advances ◽  
2017 ◽  
Vol 7 (34) ◽  
pp. 21114-21123 ◽  
Author(s):  
Ayesha Sadaf ◽  
S. K. Khare
Keyword(s):  
Ionic Liquids ◽  
Membrane Integrity ◽  
Morphological Investigation ◽  
Biochemical Reactions ◽  
Xylanase Production ◽  
Sporotrichum Thermophile ◽  
Solvent Systems

Ionic liquids (ILs) are emerging as promising solvent systems for carrying out various biochemical reactions.

Diglycolamide-Based Solvent Systems in Room Temperature Ionic Liquids for Actinide Ion Extraction: A Review

2015 ◽  
Vol 10 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Prasanta Kumar Mohapatra
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Metal Ion ◽  
Room Temperature ◽  
Review Article ◽  
Metal Ion Extraction ◽  
Ion Extraction ◽  
Radiolytic Stability ◽  
Solvent Systems ◽  
Functionalized Ligands

Abstract This review article gives a comprehensive account of the extraction of actinide ions using room temperature ionic liquid-based solvent systems containing diglycolamide (DGA) or functionalized DGA extractants. These extractants include multiple DGA-functionalized ligands such as tripodal DGA (T-DGA) and DGA-functionalized calix [4]arenes (C4DGA). Apart from metal ion extraction behaviour, other important features of the ionic liquid-based solvent systems such as separation behaviour, luminescence spectroscopic results, thermodynamics of extraction and radiolytic stability of the ionic liquid-based solvents are also reviewed. Results from studies on DGA-functionalized task-specific ionic liquids (TSIL) are also included in this review article.

Molecular Dynamics Study of Candida rugosa Lipase in Water, Methanol, and Pyridinium Based Ionic Liquids

2021 ◽  
Vol 874 ◽  
pp. 88-95
Author(s):  
Oktavianus Hendra Cipta ◽  
Anita Alni ◽  
Rukman Hertadi
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Candida Rugosa ◽  
Solvent System ◽  
Dynamics Simulation ◽  
Initial Structure ◽  
Enzymatic Reactions ◽  
Solvent Systems ◽  
To Come

The structure of Candida rugosa lipase can be affected by solvents used in the enzymatic reactions. Using molecular dynamics simulation as a tool to study the Candida rugosa lipase structure, we studied the effect of various solvent systems, such as water, water-methanol, and water-methanol-ionic liquid. These solvent systems have been chosen because lipase is able to function in both aqueous and non-aqueous medium. In this study, pyridinium (Py)-based ionic liquids were selected as co-solvent. The MD simulation was run for 50 nanoseconds for each solvent system at 328 K. In the case of water-methanol-ionic liquids solvent systems, the total number of the ionic liquids added were varied: 222, 444, and 888 molecules. Water was used as the reference solvent system. The structure of Candida rugosa lipase in water-methanol system significantly changed from the initial structure as indicated by the RMSD value, which was about 6.4 Å after 50 ns simulation. This value was relatively higher compared to the other water-methanol solvent system containing ionic liquid as co-solvent, which were 2.43 Å for 4Py-Br, 2.1 Å for 8Py-Br, 3.37 Å for 4Py-BF4 and 3.49 Å for 8Py-BF4 respectively. Further analysis by calculating the root mean square fluctuation (RMSF) of each lipase residue found that the presence of ionic liquids could reduce changes in the enzyme structure. This happened because the anion component of the ionic liquid interacts relatively more strongly with residues on the surface of the protein as compared to methanol, thereby lowering the possibility of methanol to come into contact with the protein.

High throughput approach to investigating ternary solvents of aqueous non-stoichiometric protic ionic liquids

2019 ◽  
Vol 21 (13) ◽  
pp. 6810-6827 ◽  
Author(s):  
Dilek Yalcin ◽  
Calum J. Drummond ◽  
Tamar L. Greaves
Keyword(s):  
Surface Tension ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
High Throughput ◽  
Self Assembly ◽  
Protic Ionic Liquids ◽  
Systematic Data ◽  
Solvent Systems ◽  
Compositional Space

High throughput methods were used to investigate ionic liquid containing solutions to provide systematic data of a broad compositional space. We have principally focused on the surface tension, apparent pH and liquid nanostructure to identify potential self-assembly and protein stabilizing ability of solvent systems.

scholarly journals Solvation dynamics in polar solvents and imidazolium ionic liquids: failure of linear response approximations

2018 ◽  
Vol 20 (7) ◽  
pp. 5246-5255 ◽  
Author(s):  
Esther Heid ◽  
Christian Schröder
Keyword(s):  
Ionic Liquids ◽  
Linear Response ◽  
Large Scale ◽  
Linear Response Theory ◽  
Time Dependent ◽  
Solvation Dynamics ◽  
Polar Solvents ◽  
Imidazolium Ionic Liquids ◽  
Fluorescence Measurements ◽  
Solvent Systems

Large scale computer simulations of different fluorophore-solvent systems reveal when and why linear response theory applies to time-dependent fluorescence measurements.

scholarly journals Efficiency of hydrophobic phosphonium ionic liquids and DMSO as recyclable cellulose dissolution and regeneration media

RSC Advances ◽  
2017 ◽  
Vol 7 (28) ◽  
pp. 17451-17461 ◽  
Author(s):  
Ashley J. Holding ◽  
Arno Parviainen ◽  
Ilkka Kilpeläinen ◽  
Ana Soto ◽  
Alistair W. T. King ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Cellulose Dissolution ◽  
Solvent Systems ◽  
Phosphonium Ionic Liquids ◽  
Long Chain

Hydrophobic, long-chain tetraalkylphosphonium acetate salts (ionic liquids) were combined with DMSO and the feasibility of these solvent systems for cellulose dissolution and regeneration was studied.

Liquid mixtures of ionic liquids and polymers as solvent systems

2010 ◽  
Vol 294 (1-2) ◽  
pp. 7-14 ◽  
Author(s):  
Héctor Rodríguez ◽  
Robin D. Rogers
Keyword(s):  
Ionic Liquids ◽  
Liquid Mixtures ◽  
Solvent Systems

Semiconductor nanocrystals dispersed in imidazolium-based ionic liquids: a spectroscopic and morphological investigation

2013 ◽  
Vol 15 (4) ◽  
Author(s):  
Annamaria Panniello ◽  
Enrico Binetti ◽  
Chiara Ingrosso ◽  
M. Lucia Curri ◽  
Angela Agostiano ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Semiconductor Nanocrystals ◽  
Morphological Investigation

scholarly journals [N-Methyl-2-pyrrolidone][C1–C4 carboxylic acid]: a novel solvent system with exceptional lignin solubility

2015 ◽  
Vol 51 (70) ◽  
pp. 13554-13557 ◽  
Author(s):  
Liwen Mu ◽  
Yijun Shi ◽  
Long Chen ◽  
Tuo Ji ◽  
Ruixia Yuan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Carboxylic Acid ◽  
Solvent System ◽  
Solvent Systems

Novel solvent systems composed of N-methyl-2-pyrrolidone and carboxylic acid outperform the conventional solvents and ionic liquids in lignin dissolution capability.

scholarly journals Using neoteric solvents in oil shale studies

2001 ◽  
Vol 73 (1) ◽  
pp. 153-159 ◽  
Author(s):  
M. Koel ◽  
S. Ljovin ◽  
K. Hollis ◽  
J. Rubin
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquids ◽  
Supercritical Fluids ◽  
Oil Shale ◽  
Chemical Engineering ◽  
Elevated Temperatures ◽  
Environmentally Benign ◽  
Degradation Temperature ◽  
Different Temperatures ◽  
Solvent Systems

The liquefaction, gasification, and other chemical modifications of oil shale are challenging goals of chemistry and chemical engineering. The use of new solvent systems, such as supercritical fluids and ionic liquids, represents new avenues in the search of environmentally benign technologies. Supercritical fluid extraction (SFE) with carbon dioxide is particularly effective for the isolation of substances of medium molecular weight and relatively low polarity. At elevated temperatures it is possible to unite the breaking chemical bonds in the kerogen organic matter and convert the former into oil with extraction using supercritical fluids. Quantitative and qualitative information obtained at different temperatures during SFE is providing some insight into the speciation of hydrocarbons in geological samples. Ionic liquids were studied as potential solvents for kerogen extraction. However, these chemical processes are favored at elevated temperatures up to the thermal degradation temperature of kerogen, 400 C. There were observed significant differences in the chemical composition of extracted oil and from the oil from the classical semicoking process of oil shale. An additional application would be a combination of the two methodsthe use of supercritical carbon dioxide to recover nonvolatile organic compounds from room-temperature ionic liquid without using organic solvents.

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