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1. Control of Particle Size in the Self-Assembly of Amphiphilic Statistical Copolymers

Author:
Thomas J. Neal; Andrew J. Parnell; Stephen M. King; Deborah L. Beattie; Martin W. Murray; Neal S. J. Williams; Simon N. Emmett; Steven P. Armes; Sebastian G. Spain; Oleksandr O. Mykhaylyk
Source:
Macromolecules 2021 v.54 no.3 pp. 1425-1440
ISSN:
1520-5835
Subject:
partition coefficients,   etc   ; acrylates; composite polymers; hydrophilicity; hydrophobicity; nanoparticles; particle size; polyhydroxyethyl methacrylates; polymer nanocomposites;     Show all 9 Subjects
Abstract:
... A range of amphiphilic statistical copolymers is synthesized where the hydrophilic component is either methacrylic acid (MAA) or 2-(dimethylamino)ethyl methacrylate (DMAEMA) and the hydrophobic component comprises methyl, ethyl, butyl, hexyl, or 2-ethylhexyl methacrylate, which provide a broad range of partition coefficients (log P). Small-angle X-ray scattering studies confirm that these amphiphi ...
DOI:
10.1021/acs.macromol.0c02341

2. On the limits of empirical partition coefficients for modeling material recovery facility unit operations in municipal solid waste management

Author:
Fabrice Tanguay-Rioux; Robert Legros; Laurent Spreutels
Source:
Journal of cleaner production 2021 v.293 pp. 126016
ISSN:
0959-6526
Subject:
partition coefficients,   etc   ; literature; models; municipal solid waste; physical properties; sorting; streams; waste management; Canada;     Show all 9 Subjects
Abstract:
... Material recovery facilities and mechanical biological treatments play an important role in current municipal solid waste systems, by providing a way to separate the different municipal solid waste fractions according to their main physical properties. However, the composition of their outputs streams is directly impacted by the composition of the input stream and by the sequence of unit operation ...
DOI:
10.1016/j.jclepro.2021.126016

3. Trapping multiple dual mode liquid-liquid chromatography: Preparative separation of nootkatone from a natural product extract

Author:
Raena Morley; Mirjana Minceva
Source:
Journal of chromatography 2020 v.1625 pp. 461272
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; chromatography; duration; extracts; feeds; journals; mixtures; models; nootkatone; separation; solutes; trapping; traps;     Show all 13 Subjects
Abstract:
... Trapping multiple dual mode (trapping MDM) is a preparative liquid-liquid chromatography (LLC) technique well-suited to difficult separations of intermediately-eluting components from similarly structured impurities. In this demonstrative study, a design approach for high process throughput is applied for the trapping MDM separation of a target component, nootkatone (NK), initially comprising 16.7 ...
DOI:
10.1016/j.chroma.2020.461272

4. Estimating n-octanol-water partition coefficients for neutral highly hydrophobic chemicals using measured n-butanol-water partition coefficients

Author:
Kaila B. Hanson; Dale J. Hoff; Tylor J. Lahren; David R. Mount; Anthony J. Squillace; Lawrence P. Burkhard
Source:
Chemosphere 2019 v.218 pp. 616-623
ISSN:
0045-6535
Subject:
partition coefficients,   etc   ; alcohols; hydrophobicity; models; prediction; solubility; solutes;     Show all 7 Subjects
Abstract:
... Direct measurement of the n-octanol partition coefficients (KOW) for highly hydrophobic organic chemicals is extremely difficult because of the extremely low concentrations present in the water phase. n-Butanol/water partition coefficients (KBW) are generally much lower than KOW due to the increased solubility of solute in the alcohol saturated aqueous phase, and therefore become easier to measure ...
DOI:
10.1016/j.chemosphere.2018.11.141
PubMed:
30502700
PubMed Central:
PMC6442469

5. Incorporation of Rare Earths and Yttrium in Calcite: A Critical Re-evaluation

Author:
Peter Möller; Marco De Lucia
Source:
Aquatic geochemistry 2020 v.26 no.2 pp. 89-117
ISSN:
1380-6165
Subject:
partition coefficients,   etc   ; calcite; calcium; carbonates; geochemistry; magnesium; seawater; yttrium;     Show all 8 Subjects
Abstract:
... The reported partition coefficients of REE with calcite are reviewed and critically discussed. In some of the reported experimental sets, REE concentrations are found to be supersaturated with respect to individual REE₂(CO₃)₃ but never to REE(OH)₃. Although the solutions are unsaturated with respect to individual REY carbonates, REY including Y are incorporated in calcite surfaces, where they are ...
DOI:
10.1007/s10498-020-09369-9

6. Does phase ratio in reversed phase high performance liquid chromatography vary with temperature?

Author:
Andreia-Cristina Soare; Victor David; Serban C. Moldoveanu
Source:
Journal of chromatography 2020 v.1620 pp. 461023
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; acetonitrile; enthalpy; entropy; hydrocarbons; hydrophobicity; octanol; phase transition; reversed-phase high performance liquid chromatography; temperature;     Show all 10 Subjects
Abstract:
... Phase ratio Φ for an high performance liquid chromatography (HPLC) column is a parameter defined as the ratio between the volume of the stationary phase Vₛ and the void volume of the column Vₘ. Together with the equilibrium constant K of the separation process, phase ratio is part of the retention factor k (k = KΦ). Although a considerable number of studies have been dedicated to the evaluation of ...
DOI:
10.1016/j.chroma.2020.461023

7. Solvent Selection for the Separation of Lignin-Derived Monomers Using the Conductor-like Screening Model for Real Solvents

Author:
Zhizhang Shen; Reid C. Van Lehn
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.16 pp. 7755-7764
ISSN:
1520-5045
Subject:
partition coefficients,   etc   ; countercurrent chromatography; depolymerization; industrial applications; lignin; liquid-liquid extraction; models; screening; selection criteria; solutes; solvents;     Show all 11 Subjects
Abstract:
... The separation of desired monomers from a liquid-phase mixture of lignin depolymerization products is necessary to facilitate their upscaling and upgrading for industrial applications. One effective method to separate multiple liquid-phase products is countercurrent chromatography (CCC), which is a common liquid chromatography technique that separates target solutes based on differences in their p ...
DOI:
10.1021/acs.iecr.9b06086

8. The magmatic and magmatic-hydrothermal evolution of felsic igneous rocks as seen through Nb-Ta geochemical fractionation, with implications for the origins of rare-metal mineralizations

Author:
Christophe Ballouard; Malcolm Massuyeau; Marlina A. Elburg; Sebastian Tappe; Fanus Viljoen; Jean-Tristan Brandenburg
Source:
Earth-science reviews 2020 v.203 pp. 103115
ISSN:
0012-8252
Subject:
partition coefficients,   etc   ; biotite; crystallization; fractionation; igneous rocks; mineralization; regression analysis;     Show all 7 Subjects
Abstract:
... Despite Nb and Ta being considered as ‘geochemical twins’, most Ta mineral deposits are associated with muscovite-bearing peraluminous granites and related pegmatites (MPG), whereas significant Nb deposits are related to peralkaline to metaluminous A1-type granites and syenites as well as nepheline syenites. Metaluminous to peraluminous A2-type granites and syenites have a lower potential for rare ...
DOI:
10.1016/j.earscirev.2020.103115

9. Adsorption of nitrogen-containing compounds on hydroxylated α-quartz surfaces

Author:
Oksana Tsendra; A. Daniel Boese; Olexandr Isayev; Leonid Gorb; Andrea Michalkova Scott; Frances C. Hill; Mykola M. Ilchenko; Victor Lobanov; Danuta Leszczynska; Jerzy Leszczynski
Source:
RSC advances 2019 v.9 no.62 pp. 36066-36074
ISSN:
2046-2069
Subject:
partition coefficients,   etc   ; adsorption; hydroxylation; trinitrotoluene;     Show all 4 Subjects
Abstract:
... Adsorption energies of various nitrogen-containing compounds (specifically, 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 2,4-dinitroanisole (DNAn), and 3-nitro-1,2,4-triazole-5-one (NTO)) on the hydroxylated (001) and (100) α-quartz surfaces are computed. Different density functionals are utilized and both periodic as well as cluster approaches are applied. From the adsorption energies, ...
DOI:
10.1039/c9ra07130j

10. A framework to model exposure to per- and polyfluoroalkyl substances in indoor environments

Author:
Clara M. A. Eichler; John C. Little
Source:
Environmental science 2020 v.22 no.3 pp. 500-511
ISSN:
2050-7895
Subject:
partition coefficients,   etc   ; coatings; dust; environmental health; exposure models; human health; per- and polyfluoroalkyl substances; products and commodities; volatile organic compounds;     Show all 9 Subjects
Abstract:
... Per- and polyfluoroalkyl substances (PFAS) include a wide range of halogenated chemicals, which have been used as water- and stain-resistant coatings for consumer products and industrial purposes. PFAS are persistent in the environment and several are bioaccumulative, and thus relevant for human and environmental health. Given their pervasiveness, we need to understand how we are exposed to PFAS, ...
DOI:
10.1039/c9em00556k

11. Biochar Addition Enhances Phenanthrene Fixation in Sediment

Author:
Ying-heng Fei; Yuxiao Chen; Chengshuai Liu; Tangfu Xiao
Source:
Bulletin of environmental contamination and toxicology 2019 v.103 no.1 pp. 163-168
ISSN:
0007-4861
Subject:
partition coefficients,   etc   ; adsorption; biochar; phenanthrenes; pollutants; remediation; sediments; soil; sorption isotherms; surfactants;     Show all 10 Subjects
Abstract:
... Biochar is believed to be promising for soil contaminant stabilization due to its large adsorption capacity. However, study in sediment is rare, especially with the aging effect. In the present study, a plant biomass-derived biochar was added to phenanthrene polluted sediment, in order to investigate its performance in sediment remediation. During the incubation period of 60 days, it was observed ...
DOI:
10.1007/s00128-018-2521-3

12. Bioconjugation of enzyme with silica microparticles: a promising platform for α-amylase partitioning

Author:
Maryam Karimi; Shiva Abdolrahimi; Gholamreza Pazuki
Source:
RSC advances 2019 v.9 no.32 pp. 18217-18221
ISSN:
2046-2069
Subject:
partition coefficients,   etc   ; alpha-amylase; circular dichroism spectroscopy; denaturation; microparticles; particle size; silica;     Show all 7 Subjects
Abstract:
... Here, we report the implementation of α-amylase conjugated silica microparticles for improvement of α-amylase partitioning in a PEG–organic salt-based aqueous two phase system. A direct reduction method was employed for the synthesis of silica microparticles with simultaneous introduction of α-amylase. In this context, we synthesized three different silica α-amylase conjugated microparticles with ...
DOI:
10.1039/c9ra02342a

13. Calibration parameters for the passive sampling of organic UV filters by silicone; diffusion coefficients and silicone–water partition coefficients

Author:
Rory Verhagen; Elissa O'Malley; Foppe Smedes; Jochen F. Mueller; Sarit Kaserzon
Source:
Chemosphere 2019 v.223 pp. 731-737
ISSN:
0045-6535
Subject:
partition coefficients,   etc   ; UV filters; aquatic environment; diffusivity; kinetics; monitoring; samplers; silicone; Australia;     Show all 9 Subjects
Abstract:
... In recent years, organic ultraviolet filters (UVFs) received considerable attention as a group of emerging contaminants, including in Australia where the use of UVFs is particularly relevant. Passive sampling using polymers has become widely used for routine monitoring of chemicals in the aquatic environment. Application of passive samplers for monitoring chemicals in the water relies on calibrati ...
DOI:
10.1016/j.chemosphere.2019.02.077

14. Hydrophobic and hydrophilic interactions in countercurrent chromatography

Author:
Lihong Zhang; Shihua Wu
Source:
Journal of chromatography 2020 v.1611 pp. 460576
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; additives; countercurrent chromatography; hydrophilic interaction chromatography; hydrophilic interactions; hydrophilicity; hydrophobic bonding; hydrophobic interaction chromatography; hydrophobicity; purification methods; solutes; solvents;     Show all 12 Subjects
Abstract:
... Countercurrent chromatography (or counter-current chromatography, CCC) is a unique support-free liquid-liquid partition chromatography. Since it was invented by Y. Ito in 1960s, CCC has been widely accepted and applied as popular separation and purification technique for natural and synthetic complex. However, up to date there is little study to address on hydrophobic and hydrophilic interactions ...
DOI:
10.1016/j.chroma.2019.460576

15. Closed-loop recycling dual-mode counter-current chromatography. A theoretical study

Author:
Artak E. Kostanyan; Vera V. Belova
Source:
Journal of chromatography 2019 v.1588 pp. 174-179
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; countercurrent chromatography; equations; recycling; solutes;     Show all 5 Subjects
Abstract:
... Closed-loop recycling dual-mode counter-current chromatography (CLR DM CCC) processes consist of two successive separation stages: separation of solutes in the recycling closed-loop with mobile x-phase and separation of solutes in the counter-current mode with mobile y-phase. Several variants of the implementation of this separation method can be developed: the closed-loop recycling stage may cons ...
DOI:
10.1016/j.chroma.2019.01.018

16. Modeling of closed-loop recycling dual-mode counter-current chromatography based on non-ideal recycling model

Author:
Artak E. Kostanyan; Zhanetta N. Galieva
Source:
Journal of chromatography 2019 v.1603 pp. 240-250
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; countercurrent chromatography; equations; models; solutes;     Show all 5 Subjects
Abstract:
... Closed-loop recycling dual-mode counter-current chromatography (CLR DM CCC) includes two separation stages: 1 – closed-loop recycling separation of solutes with mobile x-phase (CLR CCC); 2 – separation of solutes with the mobile y-phase in the opposite flow direction. Previous analysis of CLR DM CCC separations has been limited to the ideal recycling model, which neglects extra-column dispersion. ...
DOI:
10.1016/j.chroma.2019.06.024

17. Salt-containing aqueous two-phase system shows predictable partition of proteins with surface amino acids residues

Author:
Chika Shibata; Kazuki Iwashita; Kentaro Shiraki
Source:
International journal of biological macromolecules 2019 v.133 pp. 1182-1186
ISSN:
0141-8130
Subject:
partition coefficients,   etc   ; amino acids; ions; proteins; salts;     Show all 5 Subjects
Abstract:
... Aqueous two-phase system (ATPS) containing salts has been used for protein purification and enrichment. However, it is unclear how proteins are partitioned in the top or bottom phases of the system. In this study, we demonstrate that the partition of proteins in salt-containing ATPS (SATPS) depends only on the relation between the protein-surface amino acids and the type of salt using SATPS. The p ...
DOI:
10.1016/j.ijbiomac.2019.04.185

18. Correction: Brønsted acid mediated covalent organic framework membranes for efficient molecular separation

Author:
Hongjian Wang; Long Chen; Hao Yang; Meidi Wang; Leixin Yang; Haiyan Du; Chenliang Cao; Yanxiong Ren; Yingzhen Wu; Fusheng Pan; Zhongyi Jiang
Source:
Journal of materials chemistry A 2019 v.7 no.47 pp. 27186
ISSN:
2050-7496
Subject:
partition coefficients,   etc   ; Bronsted acids; chemical bonding; polymerization;     Show all 4 Subjects
Abstract:
... Correction for ‘Brønsted acid mediated covalent organic framework membranes for efficient molecular separation’ by Hongjian Wang et al., J. Mater. Chem. A, 2019, 7, 20317–20324. ...
DOI:
10.1039/c9ta90281c

19. Predicting Partition Coefficients of Neutral and Charged Solutes in the Mixed SLES–Fatty Acid Micellar System

Author:
Mattia Turchi; Abhishek A. Kognole; Anmol Kumar; Qiong Cai; Guoping Lian; Alexander D. MacKerell
Source:
Journal of physical chemistry 2020 v.124 no.9 pp. 1653-1664
ISSN:
1520-5207
Subject:
partition coefficients,   etc   ; cosmetics; fatty acids; ingredients; micelles; molecular dynamics; prediction; sodium; solutes; sulfates;     Show all 10 Subjects
Abstract:
... Sodium laureth sulfate (SLES) and fatty acids are common ingredients in many cosmetic products. Understanding how neutral and charged fatty acid compounds partition between micellar and water phases is crucial to achieve the optimal design of the product formulation. In this paper, we first study the formation of mixed SLES and fatty acid micelles using molecular dynamics (MD) simulations. Micelle ...
DOI:
10.1021/acs.jpcb.9b11199
PubMed:
31955574
PubMed Central:
PMC7060100

20. Classification of biphasic solvent systems according to Abraham descriptors for countercurrent chromatography

Author:
Léa Marlot; Magali Batteau; Karine Faure
Source:
Journal of chromatography 2020 v.1617 pp. 460820
ISSN:
0021-9673
Subject:
partition coefficients,   etc   ; countercurrent chromatography; ethyl acetate; heptane; methanol; models; prediction; solutes; solvation; solvents;     Show all 10 Subjects
Abstract:
... The method development of liquid-liquid chromatography, either countercurrent chromatography or centrifugal partition chromatography, is slowed down by the selection of the biphasic solvent system that constitutes its column. This paper introduces a classification of 19 solvent systems, including the most popular systems based on heptane/ethyl acetate/methanol/water, some non-aqueous systems and s ...
DOI:
10.1016/j.chroma.2019.460820