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Academic literature on the topic 'Solvent system'

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Published: 18 May 2024

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Journal articles on the topic "Solvent system"

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Raksajati, Anggit, Minh Ho, and Dianne Wiley. "Solvent Development for Post-Combustion CO2 Capture: Recent Development and Opportunities." MATEC Web of Conferences 156 (2018): 03015. http://dx.doi.org/10.1051/matecconf/201815603015.

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Chemical absorption is widely regarded as the most promising technology for post-combustion CO2 capture from large industrial emission sources with CO2 separation from natural gas using aqueous amine solvent system having been applied since the 1930s. The use of monoethanolamine (MEA) in CO2 absorption system possesses several drawbacks, such as high regeneration energy, high solvent loss, and high corrosion tendency. Various solvents have been developed for post-combustion CO2 capture application including the development of aqueous solvents and phase-change solvents. Some of these alternate solvents have been reported to have better solvent properties, which could improve the CO2 absorption system performance. This paper reviews key parameters involved in the design improvement of several chemical absorption process systems. In addition, some novel solvent systems are also discussed, for example encapsulated solvents systems. Some of the key solvent parameters that affect the capture performance, such as heat of reaction, absorption rate, solvent working capacity, solvent concentration, and solvent stability, are discussed in this paper, particularly in relation to the economic viability of the capture process. In addition, some guidelines for the future solvent development are discussed.
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HR, Kuyakhi. "Estimation of Viscosity of the N-Alkane (C1-C 4) in Bitumen System Using Adaptive Neuro-Fuzzy Interference System (ANFIS)." Petroleum & Petrochemical Engineering Journal 4, no. 3 (2020): 1–5. http://dx.doi.org/10.23880/ppej-16000233.

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One of the important mechanisms in solvent-aided thermal recovery processes is viscosity reduction. Light n-alkane hydrocarbons are among the potential solvents for solvent-aided thermal recovery processes. In this study, the viscosity of C1- C4 n-alkanes in bitumen was investigated. Adaptive neuro-fuzzy interference system (ANFIS) was used for this aim. The result obtained by the ANFIS model analyzed with the statistical parameters (i.e., MSE, MEAE, MAAE, and R2) and graphical methods. Results show that the ANFIS has high capability to the prediction of solvent/bitumen mixture viscosity.
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Tan, Zhe, Yuhan Liu, and Bo Huang. "A highly efficient three-solvent methodology for separating colloidal nanoparticles." Nanoscale 14, no. 14 (2022): 5482–87. http://dx.doi.org/10.1039/d2nr00495j.

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The centrifugation mechanism in three-solvent systems was proposed, including film formation and film fusion. A novel three-solvent system with low-toxicity solvents and high separation efficiency was established for separating nanomaterials.
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Watanabe, Kei, Taiki Nakamura, Byoung Suhk Kim, and Ick Soo Kim. "Preparation and Characteristics of Electrospun Polypropylene Fibers: Effect of Organic Solvents." Advanced Materials Research 175-176 (January 2011): 337–40. http://dx.doi.org/10.4028/www.scientific.net/amr.175-176.337.

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Recently, we have reported that syndiotactic polypropylene (sPP) fibrous membrane could be successfully prepared from a multi component solvent system via electrospinning at room temperature. The base solvent of multi component solvent system was cyclohexane. As demonstrated SEM images, the formation of rough surface morphologies and the microholes on electrospun sPP fibers were observed. In this study, we successfully prepared sPP nanofiber webs from a different base solvent was decalin. SEM study demonstrated that the sPP nanofibers prepared from decalin based solvent had smoother surface morphology unlike cyclohexane based solvent, suggesting that the surface morphology of electrospun sPP nanofibers depended on the boiling point of each solvent used. Moreover, to investigate the crystal and molecular structures of electrospun sPP fibers from a different solvent system (i.e., decalin and cyclohexane based solvents), WAXD and FT-IR analysis were carried out. The results showed that the different solvent systems caused the different surface morphologies but the crystal and molecular structure of the electrospun sPP fibers didn’t change.
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IGARI, Youichi. "Solvent recovery system." Circuit Technology 6, no. 3 (1991): 192–99. http://dx.doi.org/10.5104/jiep1986.6.3_192.

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Liu, Lei-Gen, and Ji-Huan He. "Solvent evaporation in a binary solvent system for controllable fabrication of porous fibers by electrospinning." Thermal Science 21, no. 4 (2017): 1821–25. http://dx.doi.org/10.2298/tsci160928074l.

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Solvent evaporation is used for fabrication of nanoporous fibers by electrospinning, where multiple solvents are used. Pore size and distribution can be con-trolled by the fractions of the spun solution. An experiment was carefully designed, where polysulfone and poly(lactic acid) were dissolved in a binary solvent of dichloromethane and dimethylacetamide, to reveal the controllable process for fabrication of nanoporous fibers.
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Sanders, Alyssa B., Jacob T. Zangaro, Nakoa K. Webber, Ryan P. Calhoun, Elizabeth A. Richards, Samuel L. Ricci, Hannah M. Work, et al. "Optimization of Biocompatibility for a Hydrophilic Biological Molecule Encapsulation System." Molecules 27, no. 5 (February 27, 2022): 1572. http://dx.doi.org/10.3390/molecules27051572.

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Despite considerable advances in recent years, challenges in delivery and storage of biological drugs persist and may delay or prohibit their clinical application. Though nanoparticle-based approaches for small molecule drug encapsulation are mature, encapsulation of proteins remains problematic due to destabilization of the protein. Reverse micelles composed of decylmonoacyl glycerol (10MAG) and lauryldimethylamino-N-oxide (LDAO) in low-viscosity alkanes have been shown to preserve the structure and stability of a wide range of biological macromolecules. Here, we present a first step on developing this system as a future platform for storage and delivery of biological drugs by replacing the non-biocompatible alkane solvent with solvents currently used in small molecule delivery systems. Using a novel screening approach, we performed a comprehensive evaluation of the 10MAG/LDAO system using two preparation methods across seven biocompatible solvents with analysis of toxicity and encapsulation efficiency for each solvent. By using an inexpensive hydrophilic small molecule to test a wide range of conditions, we identify optimal solvent properties for further development. We validate the predictions from this screen with preliminary protein encapsulation tests. The insight provided lays the foundation for further development of this system toward long-term room-temperature storage of biologics or toward water-in-oil-in-water biologic delivery systems.
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Sun, Shanhu, Haobin Zhang, Jinjiang Xu, Shumin Wang, Hongfan Wang, Zhihui Yu, Lang Zhao, Chunhua Zhu, and Jie Sun. "The competition between cocrystallization and separated crystallization based on crystallization from solution." Journal of Applied Crystallography 52, no. 4 (July 8, 2019): 769–76. http://dx.doi.org/10.1107/s1600576719008094.

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The competition between cocrystallization and separated crystallization in a solvent was explored via X-ray diffraction and high-performance liquid chromatography methods in different solvents and by considering the solvent evaporation rate. The results revealed that the solvent system and solvent evaporation rate can affect the nucleation order of the cocrystal and coformers in the solution. In fact, solubility tests in different solvents confirmed that the solubility plays a key role in the cocrystal formation process. Furthermore, the width of the metastable zone influenced the solute nucleation order and was a decisive factor in the cocrystal formation process when the solvent evaporation rate was varied. Cocrystals could therefore be obtained by adjusting the solvents and solvent evaporation rate. The preparation of kinetic 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane–2,4,6-trinitrophenol cocrystals via rapid solvent evaporation proves the practicability of this theory.
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Cipta, Oktavianus Hendra, Anita Alni, and Rukman Hertadi. "Molecular Dynamics Study of Candida rugosa Lipase in Water, Methanol, and Pyridinium Based Ionic Liquids." Key Engineering Materials 874 (January 2021): 88–95. http://dx.doi.org/10.4028/www.scientific.net/kem.874.88.

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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.
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Tsukagoshi, Norihiko, and Rikizo Aono. "Entry into and Release of Solvents byEscherichia coli in an Organic-Aqueous Two-Liquid-Phase System and Substrate Specificity of the AcrAB-TolC Solvent-Extruding Pump." Journal of Bacteriology 182, no. 17 (September 1, 2000): 4803–10. http://dx.doi.org/10.1128/jb.182.17.4803-4810.2000.

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ABSTRACT Growth of Escherichia coli is inhibited upon exposure to a large volume of a harmful solvent, and there is an inverse correlation between the degree of inhibition and the logP OW of the solvent, whereP OW is the partition coefficient measured for the partition equilibrium established between the n-octanol and water phases. The AcrAB-TolC efflux pump system is involved in maintaining intrinsic solvent resistance. We inspected the solvent resistance of ΔacrAB and/or ΔtolC mutants in the presence of a large volume of solvent. Both mutants were hypersensitive to weakly harmful solvents, such as nonane (logP OW = 5.5). The ΔtolC mutant was more sensitive to nonane than the ΔacrAB mutant. The solvent entered the E. coli cells rapidly. Entry of solvents with a log P OW higher than 4.4 was retarded in the parent cells, and the intracellular levels of these solvents were maintained at low levels. The ΔtolC mutant accumulated n-nonane or decane (logP OW = 6.0) more abundantly than the parent or the ΔacrAB mutant. The AcrAB-TolC complex likely extrudes solvents with a log P OW in the range of 3.4 to 6.0 through a first-order reaction. The most favorable substrates for the efflux system were considered to be octane, heptane, and n-hexane.
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Dissertations / Theses on the topic "Solvent system"

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Ghosh, Gargi. "Investigation on solute-solute, solute-solvent and solvent-solvent interactions prevailing in some liquid system." Thesis, University of North Bengal, 2009. http://hdl.handle.net/123456789/1351.

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Hoy, Thomas Lavelle. "Optimizing Solvent Blends for a Quinary System." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462199621.

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Gupta, Bindu 1963. "Solubility of anthracene in complex solvent system." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/276989.

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The solubility of anthracene was measured in binary and ternary co-solvent-water systems. The binary systems consisted of water and a completely miscible organic solvent (CMOS); while the ternary system incorporated a partially miscible organic solvent (PMOS) into the binary systems. The data were used to test the following model:(UNFORMATTED TABLE OR EQUATION FOLLOWS) log Sᵃ(c,p,w) = log Sᵃ(w) + f(c) σᵃ(c) + [(Sᴾ(w) 10 (f(c) σᴾ(c))/D(p)] σᵃ(p). (TABLE/EQUATION ENDS) The terms on the right of the equality sign are the aqueous solubility of anthracene, the solubility of anthracene in CMOS-water, and the solubility of anthracene due to the incorporation of the PMOS, respectively. This model predicts that the incorporation of a PMOS, as a solubilized solute, in CMOS-water mixtures can lead to an increase in the solubility of anthracene due to the cosolvency effect of the PMOS. The results indicate a good correlation between the observed vs. predicted increase in solubility. The deviations observed may be explained by the interactions between the solvent components.
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Fowler, Michael James. "Construction of prototype system for directional solvent extraction desalination." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76130.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 37-38).
Directional solvent extraction has been demonstrated as a low temperature, membrane free desalination process. This method dissolves the water into an inexpensive, benign directional solvent, rejects the contaminants, then recovers pure water, and re-uses the solvent. In order to bring this technology closer to real world application, a continuous process prototype for a directional solvent extraction system was developed and tested. Octanoic acid was used as the solvent of choice, and a system capable of producing up to 7 gallons per day of fresh water was constructed. The system was tested to effectively desalinate the feed water, and the total system power was less than 7 kW. The system was constructed and first tested to run fresh water and solvent through it. Fresh water was dissolved in and separated, as expected, from the solvent at a rate of about 2 gpd. Saline water containing 3.5% sodium chloride was then used as feedwater and the desalinated water was recovered at a rate of about 1 gpd with an average salinity of 0.175%. Effective continuous operation of the directional solvent extraction prototype was demonstrated. Certain design improvements to increase efficiency, optimize component sizes, and decrease energy consumption are suggested. The demonstrated system has a wide range of applications, including production of fresh water from the sea, as well as, treatment of produced and flowback water from shale gas and oil extraction.
by Michael James Fowler.
S.B.
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Brunet, Jean-Christophe. "An expert system for solvent-based separation process synthesis." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/42949.

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Expert systems are being used more daily in chemical engineering. This work continues the development of an EXpert system for SEParation flowsheet synthesis named EXSEP. Written in Prolog, it can generate flowsheets for four multicomponent separations: distillation, absorption, stripping and liquid-liquid extraction. For these separations, we describe a large collection of heuristics (or rules) that are used for flowsheet synthesis. EXSEP uses several of these heuristics and the Kremser equation to test the thermodynamic feasibility of separation tasks. EXSEP requires only basic input data such as the expected component flow rates in each product and the component K-values. With those data, EXSEP searches for the sets of the number of theoretical stages, solvent flow rate, and component-recovery ratios that characterize a number of feasible and economical flowsheets. The use of the component assignment matrix (CAM) combined with Prolog list processing makes EXSEP very fast (several seconds) to generate solutions. We test EXSEP with several examples of industrial separation processes and compare the results with the literature. We also compare EXSEP results with rigorous simulations using commercial CAD software (e.g., DESIGN II). In most cases, EXSEP gives very similar and even better flowsheets. However, EXSEP is limited to dilute solvent-based separations and cannot solve problems where the major feed component is also the solvent (e.g. sour-water steam stripper). The development of EXSEP on IBM-PC makes it very "user friendly". In the future, EXSEP should be expanded with additional modules such as extractive and azeotropic distillation, and bulk absorption. It should also include modules for separation method and solvent selections, which are great challenges in flowsheet synthesis.
Master of Science
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Tawfik, Wahid Yosry. "Design of optimal fuel grade ethanol recovery system using solvent extraction." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/11152.

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BHANDARI, SHASHANK. "Design of a solvent recovery system in a pharmaceutical manufacturing plant." Thesis, KTH, Skolan för kemivetenskap (CHE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190901.

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Solvents play a crucial role in the Active Pharmaceutical Ingredient (API) manufacturing and are used in large quantities. Most of the industries incinerate the waste solvents or send it to waste management companies for destruction to avoid waste handling and cross-contamination. It is not a cost effective method and also hazardous to the environment. This study has been performed at AstraZeneca’s API manufacturing plant at Sodertalje, Sweden. In order to find a solution, a solvent recovery system is modeled and simulated using ASPEN plus and ASPEN batch modeler. The waste streams were selected based on the quantity and cost of the solvents present in them. The solvent mixture in the first waste stream was toluene-methanol in which toluene was the key-solvent whereas in the second waste stream, isooctane-ethyl acetate was the solvent mixture in which isooctane was the key-solvent. The solvents in the waste stream were making an azeotrope and hence it was difficult to separate them using conventional distillation techniques. Liquid-Liquid Extraction with water as a solvent followed by batch distillation was used for the first waste stream and Pressure Swing Distillation was used for the second waste stream. The design was optimized based on cost analysis and was successful to deliver 96.1% toluene recovery with 99.5% purity and 83.6% isooctane recovery with 99% purity. The purity of the solvents was decided based on the quality conventions used at AstraZeneca so that it can be recovered and recycled in the same system. The results were favorable with a benefit of €335,000 per year and preventing nearly one ton per year carbon dioxide emissions to the environment. A theoretical study for the recovery system of toluene-methanol mixture was performed. The proposed design was an integration of pervaporation to the batch distillation. A blend of polyurethane / poly(dimethylsiloxane) (PU / PDMS) membrane was selected for the separation of methanol and toluene mixture. The results of preliminary calculations show 91.4% toluene recovery and 72% methanol recovery with desired purity.
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Abdul, Manaf Norhuda. "MANAGEMENT DECISION SUPPORT SYSTEM OF SOLVENT-BASED POST-COMBUSTION CARBON CAPTURE." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/16567.

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A management decision-support framework for a coal-fired power plant with solvent based post combustion CO2 capture (PCC) (integrated plant) is proposed and developed in this thesis. A brief introduction pertaining to the solvent-based PCC technology, thesis motivations and objectives are given in Chapter 1. Chapter 2 comprises a comprehensive literature review of solvent-based PCC plant from the bottom level (PCC instrumentation level) until the top level (managerial decision of PCC system). Chapter 3 describes the development of solvent-based PCC dynamic model via empirical methods. Open-loop dynamic analyses are presented to provide a deeper understanding of the dynamic behaviour of key variables in solvent-based PCC plant. Chapter 4 presents the design of the control architecture for solvent-based PCC plant. Two control algorithms developed, which utilise conventional proportional, integral and derivative (PID) controller and advanced model predictive control (MPC). Chapter 5 proposes a conceptual framework for optimal operation of the integrated plant. The MPC scheme is chosen as the control algorithm while mixed integer non-linear programming (MINLP) using genetic algorithm (GA) function is employed in the optimization algorithm. Both algorithms are integrated to produce a hybrid MPC-MINLP algorithm. Capability and applicability of the algorithm is evaluated based on 24 hours and annual operation of integrated plant. Chapter 6 extends the scope of Chapter 5 by evaluating the relevance of solvent-based PCC technology in the operation of black coal-fired power plant in Australia. This chapter considers a prevailing climate policy established in Australia namely Emission Reduction Fund (ERF). Finally, the concluding remarks and future extensions of this research are presented in Chapter 7.
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Mukherjee, P. "Solvent-free, triphase catalytic oxidation reactions over TS-1/H2O2 system." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2000. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2277.

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Alturaihi, Haydar. "Biocatalysis of lipoxygenase in a model system using selected organic solvent media." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96760.

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The biocatalysis of commercially purified soybean lipoxygenase (LOX-1B: EC 1.13.11.12) in ternary micellar and neat organic solvent media, using linoleic acid as a substrate model, was investigated. The organic solvent, used throughout this study, was at different ratios in the ternary micellar system, composed of Tris-HCl buffer solution (0.1 M, pH 9.0) and 10 µM of Tween-40 as the surfactant. The results indicated a 1.4- and 1.7-fold increase in LOX activity when, respectively, 2% iso-octane or 2% hexane was used as the organic solvent in comparison to that in the aqueous medium. The kinetic parameters, including Km and Vmax values, the choice of the surfactant, the optimum reaction temperature and the optimum pH, were investigated. The effects of selected parameters, including initial water activity (aw, 0.23 to 0.75), agitation speed (0 to 200 rpm), reaction temperature (20 to 45ºC) and thermal stability of LOX activity in neat organic solvent, were also studied. The experimental findings showed that the Km and Vmax values in the ternary micellar system containing 2% hexane was calculated to be 7.7 µmol of linoleic acid and 30.0 nmol of linoleic acid hydroperoxides (HPODs)/mg protein/min, respectively, as compare to that of 20.7 µmol of linoleic acid and 8.3 nmol HPODs/mg protein/min in the neat organic solvent, respectively. The experimental results indicated that the major LOX specific activity, for both aqueous and ternary micellar systems, was measured at pH 9.0, with a minor one at pH 6.0 for the aqueous system and at pH 7.0 for the ternary micellar system. The activation energy (Ea) of the reaction system of LOX was 9.87 kJ/mol or 2.36 kcal/mol. The half-life (T50) for LOX was 27.61, 66.63 and 138.6 min for the aqueous, ternary micellar and neat organic media, respectively.
La biocatalyse de la lipoxygénase purifiée, obtenus à partir de la graine de soja (LOX-1B: EC 1.13.11.12), a été étudiée en milieux micellaire ternaire et en monophasique organique, en utilisant l'acide linoléique comme substrat modèle. Le solvant organique, utilisé dans cette étude, a été utilisé à différentes concentrations dans le système micellaire ternaire, composé d'une solution tampon Tris-HCl (0,1 M, pH 9,0) et 10 µM d'un surfactant, le Tween-40. Les résultats obtenus ont démontré qu'il y a une augmentation de 1,4 et 1,7 fois de l'activité enzymatique de la LOX en utilisant, respectivement, soit du l'iso-octane à 2% ou soit du l'hexane à 2%, comme le solvant organique en comparaison avec celle en milieux aqueux. Les paramètres cinétiques, comportant les valeurs de Km et de Vmax, le choix de surfactant ainsi que la température et le pH optimal de la réaction ont été étudiés. Les effets de différents paramètres tels que l'activité initiale de l'eau (aw) du 0,23 à 0,75, l'agitation du 0 à 200 rpm, la température de la réaction du 20 à 45ºC et la stabilité thermique de l'activité de la LOX en milieux monophasiques organiques ont été aussi étudiés. Les résultats obtenus tendent à montré que les valeurs de Km et de Vmax en système micellaire ternaire, contenant de l' hexane à 2%, ont été de 7,7 µmol d'acide linoléique et 30,0 nmol d'hydroperyde de l'acide linoléique (HPODs)/mg protéine/min, respectivement, en comparaison à des valeurs de 20,7 µmol d'acide linoléique et 8,3 nmol HPODs/mg protéine/min dans les milieux monophasiques organiques, respectivement. De plus, les résultats expérimentaux ont démontré que l'activité spécifique maximale de la LOX pour les deux systèmes aqueux et micellaire ternaire a été obtenue à pH 9,0, avec aussi une activité minimale à pH 6,0 pour le système aqueux et à pH 7,0 pour le système micellaire ternaire. L'énergie d'activation (Ea) du système de réaction de la LOX était d'une valeur de 9,87 kJ/mol ou 2,36 kcal/mol. La demi-vie (T50) de LOX a été déterminée à 27,61 min dans le milieu aqueux, 66,63 min dans le milieu micellaire ternaire et 138,6 min dans les milieux monophasiques organiques.
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Books on the topic "Solvent system"

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Washington (State). Hazardous Waste and Toxics Reduction Program., ed. Optimizing your parts cleaning system: Alternatives to hazardous solvents. [Olympia, Wash.]: Hazardous Waste and Toxics Reduction Program, Washington State Dept. of Ecology, 1996.

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Massachusetts. Dept. of Environmental Protection. Office of Technical Assistance. Deluxe's solvent-free printing system. [Boston, Mass.]: Office of Technical Assistance, Executive Office of Environmental Affairs, Commonwealth of Massachusetts, 1994.

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Burston, Mark William. The hydrogeology and chlorinated hydrocarbon solvent pollution of the Coventry aquifer system. Birmingham: University of Birmingham, 1994.

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MacNiven, Iain. The use of the BR solvent recovery system in an anatomic pathology laboratory. [Toronto]: Ontario Environment, 1993.

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Yi, Chae-wŏn. Sinʼgyŏng toksŏng mulchil ŭi toksŏng chagyong yŏnghyang yŏnʼgu =: Effects of organic solvent in neural stem cell and hippocampal neuron. [Seoul]: Sikpʻum Ŭiyakpʻum Anjŏnchʻŏng, 2007.

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1920-, Jackson D. K., Canada. Technology Development and Technical Services Branch., and Development & Demonstration of Resource & Energy Conservation Technology Program., eds. Development of a system to combine solvent recovery with the recovery of heat from residual organic wastes. Ottawa: The Branch, 1989.

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Johan, De Kleer, ed. Building problem solvers. Cambridge, Mass: MIT Press, 1993.

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Klir, George J. Architecture of Systems Problem Solving. Boston, MA: Springer US, 2003.

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John, Boardman. Systemic thinking: Building maps for worlds of systems. Hoboken, New Jersey: Wiley, 2013.

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Cheng, Tracey Kim. A graph based system solving symetric and sparse linear systems of equations. Oxford: Oxford Brookes University, 2002.

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Book chapters on the topic "Solvent system"

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Yang, Zhen-Zhen, Qing-Wen Song, and Liang-Nian He. "PEG/scCO2 Biphasic Solvent System." In SpringerBriefs in Molecular Science, 17–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31268-7_3.

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Peterson, R. A., C. L. Crawford, F. F. Fondeur, and T. L. White. "Radiation Stability of Calixarene-Based Solvent System." In ACS Symposium Series, 45–55. Washington, DC: American Chemical Society, 2000. http://dx.doi.org/10.1021/bk-2000-0757.ch004.

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Ali, Khursheed, Tijo Cherian, Saher Fatima, Quaiser Saquib, Mohammad Faisal, Abdulrahman A. Alatar, Javed Musarrat, and Abdulaziz A. Al-Khedhairy. "Role of Solvent System in Green Synthesis of Nanoparticles." In Green Synthesis of Nanoparticles: Applications and Prospects, 53–74. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5179-6_3.

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Dickert, F. L., G. Bertlein, K. Reif, G. Mages, and H. Kimmel. "Ionic Sensor Layers on Microelectronic Structures for the Detection of Solvent Vapours." In Micro System Technologies 90, 669–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-45678-7_96.

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Langone, Marta A. P., and Geraldo L. Sant’Anna. "Enzymatic Synthesis of Medium-Chain Triglycerides in a Solvent-Free System." In Twentieth Symposium on Biotechnology for Fuels and Chemicals, 759–70. Totowa, NJ: Humana Press, 1999. http://dx.doi.org/10.1007/978-1-4612-1604-9_69.

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Langone, Marta A. P., Melissa E. de Abreu, Michelle J. C. Rezende, and Geraldo L. Sant’Anna. "Enzymatic Synthesis of Medium Chain Monoglycerides in a Solvent-Free System." In Biotechnology for Fuels and Chemicals, 987–96. Totowa, NJ: Humana Press, 2002. http://dx.doi.org/10.1007/978-1-4612-0119-9_80.

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Abd el Rahman, S., C. Goldammer, and E. Bayer. "A novel solvent system for the synthesis of long-chain oligohomopeptides." In Peptides 1992, 300–301. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1470-7_125.

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Itoh, Toshiyuki, Yoshihito Nishimura, Masaya Kashiwagi, and Makoto Onaka. "Efficient Lipase-Catalyzed Enantioselective Acylation in an Ionic Liquid Solvent System." In ACS Symposium Series, 251–61. Washington, DC: American Chemical Society, 2003. http://dx.doi.org/10.1021/bk-2003-0856.ch021.

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Yang, Kap-Seung, Michael H. Theil, and John A. Cuculo. "Lyotropic Mesophases of Cellulose in the Ammonia—Ammonium Thiocyanate Solvent System." In ACS Symposium Series, 156–83. Washington, DC: American Chemical Society, 1989. http://dx.doi.org/10.1021/bk-1989-0384.ch011.

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Fregolente, Patricia Bogalhos Lucente, Leonardo Vasconcelos Fregolente, Gláucia Maria F. Pinto, Benedito César Batistella, Maria Regina Wolf-Maciel, and Rubens Maciel Filho. "Monoglycerides and Diglycerides Synthesis in a Solvent-Free System by Lipase-Catalyzed Glycerolysis." In Biotechnology for Fuels and Chemicals, 285–92. Totowa, NJ: Humana Press, 2008. http://dx.doi.org/10.1007/978-1-60327-526-2_29.

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Conference papers on the topic "Solvent system"

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Zapton, James G. "Portable Solvent Recycling System." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/950243.

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Karlström, G., and P. Å Malmqvist. "Theoretical aspects on electron transfer in the Fe2+–Fe3+ system." In Ultrafast reaction dynamics and solvent effects. AIP, 1994. http://dx.doi.org/10.1063/1.45416.

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Rasrendra, Carolus Borromeous, Ronny Purwadi, Christian Christian, Harry James Cho, and Haryo Pandu Winoto. "Lignocellulosic biomass fractionation through biphasic-solvent system." In THE 7TH BIOMEDICAL ENGINEERING’S RECENT PROGRESS IN BIOMATERIALS, DRUGS DEVELOPMENT, AND MEDICAL DEVICES: The 15th Asian Congress on Biotechnology in conjunction with the 7th International Symposium on Biomedical Engineering (ACB-ISBE 2022). AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0194290.

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Smail, Timothy R., Annamarie M. Herb, and Monica C. Hall. "Stabilization of Underground Solvent Storage Tanks." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4786.

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The Old Solvent Tanks (OST), located at the Savannah River Site (SRS) Old Radioactive Waster Burial Ground (ORWBG), are comprised of 22 underground storage tanks that were used to store spent radioactive solvent and aqueous wastes generated from the plutonium-uranium extraction (PUREX) process. The OSTs were installed at various dates between 1955 and 1968 and used to store the spent solvents until 1974. The spent solvents stored in the OSTs were transferred out from 1976 through 1981 leaving only residual liquids and sludges that could not be pumped out. Final remediation goals for the ORWBG include an overlying infiltration control system. If the tanks were to structurally fail, they would collapse causing potential for onsite worker exposure and release of tank contents to the environment. Therefore, as an interim action, methods for stabilizing the tanks were evaluated. The preferred remedial action was “Grouting of the Tank Wastes In-situ.” The primary function of the grout is to provide structural stability of the tanks by filling void space with material that prevents tank collapse. Incidental to any mixing that may occur, residual material in the tanks will be incorporated into the grouting mixture. The incidental grouting will ultimately improve environmental protection by rendering the residual material immobile. To accomplish this task, the SRS Environmental Restoration Division (ERD) teamed with the Savannah River Technology Center (SRTC) to determine a remedial design strategy and to translate this strategy into a construction specification and drawings for implementation. The OST remedial design strategy contained the following key aspects for performance requirements and acceptance criteria: • Grout mix; • Tank atmosphere testing; • Grout delivery system and camera monitoring system; • Off-Gas HEPA filter system and environmental monitoring; • OST Sealing and labeling. From November 2001 through February 2003 all 22 Old Solvent Tanks were successfully stabilized. This paper will discuss the systems designed to perform and monitor the grouting operation, the grouting process, and the radiological controls and wastes associated with grouting the Old Solvent Tanks.
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Gulati, Shivani, M. Sachdeva, and K. K. Bhasin. "Capping agents in nanoparticle synthesis: Surfactant and solvent system." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5032549.

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Singh, Anil Kr. "Kinetics Investigation of Solvent Polarity on Reaction Rate for Solvolysis of Ethyl Caprylate Ester in Binary Solvent System." In 2021 10th International Conference on System Modeling & Advancement in Research Trends (SMART). IEEE, 2021. http://dx.doi.org/10.1109/smart52563.2021.9676306.

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Xu, Yuan, and Qunxiong Zhu. "Extension theory-based modeling for purified terephthalic acid solvent system." In 2010 8th IEEE International Conference on Control and Automation (ICCA). IEEE, 2010. http://dx.doi.org/10.1109/icca.2010.5524140.

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Li, Chunyu, Quanhui Li, Tingting Yao, Zhengyang Wang, Luoyun Zheng, and Jiaying Xin. "Chemo enzymatic Synthesis for Poly3-hydroxypropionate in Solvent-free System." In 2016 6th International Conference on Mechatronics, Computer and Education Informationization (MCEI 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/mcei-16.2016.87.

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Davood Abadi Farahani, Mohammad Hossein. "Organic solvent nanofiltration membrane for vegetable oil refining." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/srfh3809.

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Membrane separation technology has been receiving much attention for processing vegetable oils due to its potential advantages over conventional purification techniques. Based on the molecular weights and their interactions with the membrane, various solutes can be removed or purified using this technology. However, one of the major challenges is that the membrane has to be chemically inert to organic solvents such as hexane or acetone. Thus, many studies have been focused on developing chemically resistant membranes for specific industrial applications. Organic solvent nanofiltration (OSN) membranes is one of the potential energy efficient and sustainable separation processes that can drastically change the way solvents are recovered and free fatty acids (FFA) are removed in the vegetable oil industry. Seppure's patented GreenMem Series can process vegetable oil in acetone and hexane, achieving high product purity at relatively mild conditions (25 €“ 60°C, 10 €“ 30 bar). This results in up to 90% lower energy consumption and CO2e emissions as well as up to 30-50% lower operating costs compared to the conventional separation processes. GreenMem Series membranes show a high pure solvent flux of 30 €“ 40 LMH for acetone and hexane as well as high rejection towards oil molecules >95%. Moreover, 99% of FFA can be removed from a solvent/FFA mixture using multi-pass filtration system, which can be implemented in a unique membrane system to separate oil/FFA/solvent from each other. Moreover, GreenMem system can be implemented in both continuous and batch processes. Just like many other membrane technologies, its modularity makes it easy to be scaled up based on production capacity to augment existing processes. It is envisioned that OSN technology provides both positive economic and environmental impacts on the vegetable oil industry.
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Zinth, W., S. Engleitner, and M. Seel. "Wavepacket Motion observed in an Ultrafast Electron Transfer System." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.25.

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Recently it had been shown that ultrafast electron transfer (ET) reactions can occur even faster than relevant reorganisation and relaxation processes /1-3/. These experiments raised a number of new questions such as: How can those ultrafast reactions proceed, what reaction mechanism applies and what is the role of specific vibrational modes or wavepacket motions? In this paper we present new experimental results taken over a wide range of probing wavelengths with highest time resolution on a fast ET-system. We will focus on the system oxazine 1 in two solvents: The first combination is oxazine 1 (OX1) in dimethylaniline (DMA) where an ultrafast light induced ET occurs from DMA to OX1. As a reference system without electron transfer, we use the solvent 1-chloronaphtalene (1-CN) which has similar solvent properties ( dipole moment, dielectric constant, viscosity) as dimethylaniline. The experiments are performed with a CPM-laser based amplifier/compressor system /4/ with red (630 nm) excitation and different probing wavelengths covering the whole visible spectrum. Cross-correlation widths are ≈12 fs in the red and near IR and ≤ 22 fs in the blue-green part of the spectrum.
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Reports on the topic "Solvent system"

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Twitchell, K. E., and N. L. Skinner. Hazardous Solvent Substitution Data System tutorial. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10194568.

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Peterson, R. A. Radiation Stability of Calixarene Based Solvent System. Office of Scientific and Technical Information (OSTI), January 1999. http://dx.doi.org/10.2172/4851.

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Valentine, Jessica, Alex Zoelle, Sally Homsy, Hari Mantripragada, Aaron Kilstofte, Mike Sturdivan, Mark Steutermann, and Timothy Fout. Direct Air Capture Case Studies: Solvent System. Office of Scientific and Technical Information (OSTI), September 2022. http://dx.doi.org/10.2172/1893369.

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Lee, D. D. Density Changes in the Optimized CSSX Solvent System. Office of Scientific and Technical Information (OSTI), November 2002. http://dx.doi.org/10.2172/885674.

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Haire, M. J., M. S. Grady, and R. T. Jubin. Availability assessment of a centrifugal contactor solvent extraction system. Office of Scientific and Technical Information (OSTI), August 1985. http://dx.doi.org/10.2172/711842.

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Branham-Haar, K. A., and K. E. Twitchell. Hazardous Solvent Substitution Data System reference manual. Revision 1. Office of Scientific and Technical Information (OSTI), July 1993. http://dx.doi.org/10.2172/10194048.

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Moyer, Bruce A., Laetitia Helene Delmau, Joseph F. Birdwell Jr, and Joanna McFarlane. Caustic-Side Solvent-Extraction Modeling for Hanford Interim Pretreatment System. Office of Scientific and Technical Information (OSTI), June 2008. http://dx.doi.org/10.2172/969952.

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Moyer, B. A., J. F. Birdwell, L. H. Delmau, and J. McFarlane. Caustic-Side Solvent-Extraction Modeling for Hanford Interim Pretreatment System. Office of Scientific and Technical Information (OSTI), June 2008. http://dx.doi.org/10.2172/951061.

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Brown, Alfred, and Nathan Brown. Novel Solvent System for Post Combustion CO{sub 2} Capture. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1155036.

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Casella, V. MODULAR CAUSTIC SIDE SOLVENT EXTRACTION UNIT GAMMA MONITORS SYSTEM FINAL REPORT. Office of Scientific and Technical Information (OSTI), June 2007. http://dx.doi.org/10.2172/910462.

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