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1. Building Nanopore-Supported 2D Vesicles in Surfaces

Author:
Gimenez, Rocío; Mercuri, Magalí; Bellino, Martín G.; Berli, Claudio L.A.
Source:
Colloids and surfaces 2019
ISSN:
0927-7757
Subject:
aqueous solutions,   etc   ; oils; porous media;     Show all 3 Subjects
Abstract:
... Water compartmentalization in a two-dimensional (2D) configuration is a challenging and thriving field. Here, we form fluid-fluid structures called 2D vesicles in which aqueous solutions are encapsulated within small oil barriers into a mesoporous thin film that allows them to communicate with a surrounding aqueous environment through predefined paths. Each area in the 2D space can also be program ...
DOI:
10.1016/j.colsurfa.2019.04.038

2. Degradation of metronidazole by dielectric barrier discharge in an aqueous solution

Author:
Yang, Zhipeng; Lai, Anxing; Chen, Hangyu; Yan, Youxiang; Yang, Ye; Zhang, Weiwei; Wang, Lei
Source:
Frontiers of environmental science & engineering 2019 v.13 no.3 pp. 33
ISSN:
2095-2201
Subject:
aqueous solutions,   etc   ; antibiotics; metronidazole; organic matter; pH;     Show all 5 Subjects
Abstract:
... Degradation of metronidazole (MNZ) which is a representative and stable antibiotic by dielectric barrier discharge (DBD) in an aqueous solution has been studied. Effects of initial MNZ concentration, solution pH and coexisting organics on the degradation were investigated. The results illustrated that increasing the input power and the discharge frequency can improve the removal of MNZ. At low ini ...
DOI:
10.1007/s11783-019-1117-4

3. Gamma-Bi₄V₂O₁₁ – a layered oxide material for ion exchange in aqueous media

Author:
Lv, Peiwen; Huang, Feng
Source:
RSC advances 2019 v.9 no.15 pp. 8650-8653
ISSN:
2046-2069
Subject:
aqueous solutions,   etc   ; catalytic activity; ion exchange; oxides;     Show all 4 Subjects
Abstract:
... Layered perovskite oxides have attracted considerable attention due to their potential application in photoelectricity and catalysis. The unique character of layered perovskites as ion-exchange materials provides the possibility of creating structural diversity. A new ion-exchange reaction in aqueous solution was observed in layered oxide gamma-Bi₄V₂O₁₁. When employed in ion exchange, gamma-Bi₄V₂O ...
DOI:
10.1039/c8ra09565e

4. Motion of spheres and cylinders in viscoelastic fluids: Asymptotic behavior

Author:
Kaur, Amanjot; Sobti, Amit; Toor, Amrit Pal; Wanchoo, Ravinder Kumar
Source:
Powder technology 2019 v.345 pp. 82-90
ISSN:
0032-5910
Subject:
aqueous solutions,   etc   ; Reynolds number; polyacrylamide; powders; viscoelasticity;     Show all 5 Subjects
Abstract:
... Experiments were conducted to elucidate the effect of fluid elasticity on the motion of single spherical and cylindrical particles in viscoelastic fluids. Aqueous solutions of polyacrylamide in the concentration range of 0.35–0.6% wt./vol. were used as test fluids. The phenomenon of drag enhancement was observed. The maximum drag enhancement occurred at a Weissenberg number (Wi) of 60, beyond whic ...
DOI:
10.1016/j.powtec.2018.12.073

5. On the Mechanism of Phenolate Photo-Oxidation in Aqueous Solution

Author:
Tyson, Alexandra L.; Verlet, Jan R. R.
Source:
TheJournal of physical chemistry 2019 v.123 no.10 pp. 2373-2379
ISSN:
1520-5207
Subject:
aqueous solutions,   etc   ; dissociation; energy; photooxidation; spectroscopy; wavelengths;     Show all 6 Subjects
Abstract:
... The photo-oxidation dynamics following ultraviolet (257 nm) excitation of the phenolate anion in aqueous solution is studied using broadband (550–950 nm) transient absorption spectroscopy. A clear signature from electron ejection is observed on a sub-picosecond timescale, followed by cooling dynamics and the decay of the signal to a constant offset that is assigned to the hydrated electron. The dy ...
DOI:
10.1021/acs.jpcb.8b11766

6. Highly efficient and selective visible-light driven CO₂-to-CO conversion by a Co-based cryptate in H₂O/CH₃CN solution

Author:
Liu, Dong-Cheng; Wang, Hong-Juan; Wang, Jia-Wei; Zhong, Di-Chang; Jiang, Long; Lu, Tong-Bu
Source:
Chemical communications 2018 v.54 no.80 pp. 11308-11311
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; cobalt; photocatalysis;     Show all 3 Subjects
Abstract:
... Herein, we report a mononuclear Co(ii) cryptate which exhibits highly efficient and selective photocatalytic CO₂-to-CO conversion in H₂O/CH₃CN solution. The TON and selectivity reach as high as 51 392 and 98%, respectively. ...
DOI:
10.1039/c8cc04892d

7. Process-Tracing Study on the Postassembly Modification of Highly Stable Zirconium Metal–Organic Cages

Author:
Liu, Guoliang; Di Yuan, Yi; Wang, Jian; Cheng, Youdong; Peh, Shing Bo; Wang, Yuxiang; Qian, Yuhong; Dong, Jinqiao; Yuan, Daqiang; Zhao, Dan
Source:
Journal of the American Chemical Society 2018 v.140 no.20 pp. 6231-6234
ISSN:
1520-5126
Subject:
aqueous solutions,   etc   ; ligands; zirconium;     Show all 3 Subjects
Abstract:
... Metal–organic cages (MOCs) are discrete molecular assemblies formed by coordination bonds between metal nodes and organic ligands. The application of MOCs has been greatly limited due to their poor stability, especially in aqueous solutions. In this work, we thoroughly investigate the stability of several Zr-MOCs and reveal their excellent stability in aqueous solutions with acidic, neutral, and w ...
DOI:
10.1021/jacs.8b03517

8. Marangoni flow and free convection during crystallization of a salt solution droplet

Author:
Kuznetsov, G.V.; Misyura, S.Y.; Volkov, R.S.; Morozov, V.S.
Source:
Colloids and surfaces 2019 v.572 pp. 37-46
ISSN:
0927-7757
Subject:
aqueous solutions,   etc   ; convection; crystallization; crystals; droplets; evaporation; models; temperature;     Show all 8 Subjects
Abstract:
... The behavior of evaporation and crystallization of a drop of an aqueous solution of LiBr salt at the moment of rapid motion of the crystalline crust has been experimentally investigated. With the use of non-contact method of Particle Image Velocity (PIV) a technique was developed for measuring the instantaneous velocity field inside the droplet during crystallization. Data on the convection dynami ...
DOI:
10.1016/j.colsurfa.2019.03.051

9. Experimental studies on hydrogen hydrate with tetrahydrofuran by differential scanning calorimeter and in-situ Raman

Author:
Cai, Jing; Tao, Yuan-Qing; von Solms, Nicolas; Xu, Chun-Gang; Chen, Zhao-Yang; Li, Xiao-Sen
Source:
Applied energy 2019 v.243 pp. 1-9
ISSN:
0306-2619
Subject:
aqueous solutions,   etc   ; differential scanning calorimetry; hydrogen; temperature; tetrahydrofuran; thermal properties;     Show all 6 Subjects
Abstract:
... Clathrate hydrate is a kind of environment-friendly material for storing hydrogen under a certain condition of temperature and pressure. In this work, tetrahydrofuran aqueous solution with concentration of 3.0 mol% was adopted to investigate hydrogen storage process. Moreover, thermal property of hydrate was measured by high pressure differential scanning calorimeter, and mechanism of hydrate-base ...
DOI:
10.1016/j.apenergy.2019.03.179

10. Selecting the best piping arrangement for scaling-up an annular channel reactor: An experimental and computational fluid dynamics study

Author:
Moreira, Francisca C.; Bocos, Elvira; Faria, Ana G.F.; Pereira, Joana B.L.; Fonte, Cláudio P.; Santos, Ricardo J.; Lopes, José Carlos B.; Dias, Madalena M.; Sanromán, M.A.; Pazos, M.; Boaventura, Rui A.R.; Vilar, Vítor J.P.
Source:
The Science of the total environment 2019 v.667 pp. 821-832
ISSN:
0048-9697
Subject:
aqueous solutions,   etc   ; hydrodynamics; models; pipes; remediation; ultraviolet radiation; wastewater;     Show all 7 Subjects
Abstract:
... This study is focused on the selection of the best piping arrangement for a pilot scale annular channel reactor intended for the remediation of waters and wastewaters. Two annular channel reactors composed of a single UV lamp and distinct piping arrangements were considered: (i) a novel reactor with tangential inlet/outlet pipes – the FluHelik reactor, and (ii) a conventional Jets reactor. These t ...
DOI:
10.1016/j.scitotenv.2019.02.260

11. Adsorption of arsenic (V) from aqueous solution using modified saxaul ash: isotherm and thermodynamic study

Author:
Rahdar, Somayeh; Taghavi, Mahmoud; Khaksefidi, Razieh; Ahmadi, Shahin
Source:
Applied water science 2019 v.9 no.4 pp. 87
ISSN:
2190-5487
Subject:
aqueous solutions,   etc   ; adsorbents; adsorption; arsenic; pH; sorption isotherms; temperature; thermodynamics;     Show all 8 Subjects
Abstract:
... Recently, arsenic-contaminated water has become a big concern. Therefore, the present study aimed to absorb arsenic from the aqueous solution using modified saxaul tree ash. Arsenic adsorption process was performed in vitro by investigating the effect of various parameters such as pH, contact time, arsenic concentrations, temperature and adsorbent dosage on the adsorption efficiency. Isotherms, ki ...
DOI:
10.1007/s13201-019-0974-0

12. Partial molar volumes and isentropic compressions of sugar alcohols in aqueous solutions from 15 °C to 40 °C at atmospheric pressure

Author:
Bernal, Pedro; Brown, Shanica; Mera, Mariela; Bouchibti, Yasmine
Source:
Food chemistry 2019 v.280 pp. 164-174
ISSN:
0308-8146
Subject:
aqueous solutions,   etc   ; atmospheric pressure; erythritol; maltitol; sorbitol; sweetness; temperature; xylitol;     Show all 8 Subjects
Abstract:
... Densities and sound speeds of aqueous solutions of Erythritol, Xylitol, Sorbitol, and Maltitol were measured at 15 °C, 25 °C, 40 °C, and 45 °C using a density and sound velocity meter (DSA 5000M). The results were used to calculate the apparent and standard molar volumes and compressions, the specific volumes and compressions, as well as the hydration numbers and their temperature dependence. The ...
DOI:
10.1016/j.foodchem.2018.11.120

13. Carboxyl-functionalized lotus seedpod: A highly efficient and reusable agricultural waste-based adsorbent for removal of toxic Pb2+ ions from aqueous solution

Author:
Liu, Yan; Gao, Qiang; Pu, Song; Wang, Hongquan; Xia, Kaisheng; Han, Bo; Zhou, Chenggang
Source:
Colloids and surfaces 2019 v.568 pp. 391-401
ISSN:
0927-7757
Subject:
aqueous solutions,   etc   ; adsorbents; adsorption; agricultural wastes; ions; lead; moieties; toxicity;     Show all 8 Subjects
Abstract:
... Converting agricultural wastes into efficient adsorbents is a promising pathway that helps mitigate environmental problems and reduce the waste of natural resource. Herein, agriculturally wasted lotus seedpod (LSP) was functionalized with carboxyl groups for the first time through a simple chemical modification and developed as a novel adsorbent for removal of Pb2+ ions from aqueous solution. Comp ...
DOI:
10.1016/j.colsurfa.2019.02.017

14. Effect of polyaluminum chloride on coal flotation performance with different reagent addition regimes

Author:
Liang, Long; Tian, Feng; Wang, Liguang; Xie, Guangyuan
Source:
Powder technology 2019 v.349 pp. 84-91
ISSN:
0032-5910
Subject:
aqueous solutions,   etc   ; coal; kaolinite; particle size distribution; powders; probability; reflectance;     Show all 7 Subjects
Abstract:
... The flotation tests of an artificial mixture of coal (250–125 μm) and kaolinite (−100 μm) were conducted with two different reagent addition regimes to improve understanding of the effect of polyaluminum chloride (PAC) on coal flotation with n-dodecane as collector. The flotation results suggested that improved separation efficiency with reduced kaolinite entrainment could be achieved by addition ...
DOI:
10.1016/j.powtec.2019.03.032

15. Adsorption of Cd (II) on chitosan–silica hybrid aerogel from aqueous solution

Author:
Ebisike, Kelechi; Okoronkwo, Afamefuna Elvis; Alaneme, Kenneth Kanayo
Source:
Environmental technology & innovation 2019 v.14 pp. 100337
ISSN:
2352-1864
Subject:
aqueous solutions,   etc   ; adsorption; aerogels; cadmium; kinetics; pH; sorption isotherms;     Show all 7 Subjects
Abstract:
... Chitosan–silica hybrid aerogel was applied in aqueous solution for Cd2+ removal. The resulting aerogel was subjected to pH, contact time, and metal recovery studies. Data obtained was subjected to kinetic and isotherm studies. The optimum conditions for Cd2+ adsorption was established to be at a pH of 3 and contact time of 180 min. Pseudo second order kinetic model with R2 value above 0.9 was best ...
DOI:
10.1016/j.eti.2019.100337

16. Developing chemically modified redox-responsive proteins as smart therapeutics

Author:
TangQ. Tang and J. X. Wang contributed equally., Qiao; Wang, Jianxue; Jiang, Ying; Zhang, Meining; Chang, Jin; Xu, Qiaobing; Mao, Lanqun; Wang, Ming
Source:
Chemical communications 2019 v.55 no.35 pp. 5163-5166
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; chemical reactions; glutathione; ligands; neoplasms; proteins; ribonucleases; therapeutics;     Show all 8 Subjects
Abstract:
... The conditional control of protein function in response to the physiological changes of diseased cells is essential to develop smart protein therapeutics. Herein, we report a redox-responsive chemical modification of a protein by conjugating an intracellular glutathione (GSH)-cleavable ligand, NSA, onto a protein residue. We demonstrated that the NSA conjugation of Ribonuclease A (RNase A) enabled ...
DOI:
10.1039/c9cc00519f

17. Fabrication of superhydrophobic aluminum surface by droplet etching and chemical modification

Author:
Zhang, Xin; Zhao, Jing; Mo, Jiliang; Sun, Ruoyu; Li, Zhen; Guo, Zhiguang
Source:
Colloids and surfaces 2019 v.567 pp. 205-212
ISSN:
0927-7757
Subject:
aqueous solutions,   etc   ; aluminum; colloids; droplets; hydrophobicity; thermal stability;     Show all 6 Subjects
Abstract:
... The development of techniques to fabricate superhydrophobic aluminum surfaces is rapidly maturing, yet the problems of high loss of material and complex preparation still persist. To address this, a simple method that combines droplet etching and chemical modification was used to fabricate a superhydrophobic aluminum surface, with a contact angle of 156° and a sliding angle of 5°. Compared with th ...
DOI:
10.1016/j.colsurfa.2019.01.046

18. Soft ionic liquid multi-point touch sensor

Author:
Fastier-Wooller, Jarred; Dinh, Toan; Dau, Van Thanh; Dao, Dzung Viet
Source:
RSC advances 2019 v.9 no.19 pp. 10733-10738
ISSN:
2046-2069
Subject:
aqueous solutions,   etc   ; anions; cations; electronic equipment; humans; ionic liquids; temperature;     Show all 7 Subjects
Abstract:
... The development of electronic skin (e-skin) and soft tactile sensing has recently attracted great interest. Here we report for the first time on a novel ionic liquid (IL) based soft pressure sensor with multi-point touch detection capability using 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]⁺[BF₄]⁻) as a highly conductive sensing medium. The sensing mechanism is attributed to the repopula ...
DOI:
10.1039/c9ra00322c

19. Isotopic substitution affects excited state branching in a DNA duplex in aqueous solution

Author:
ZhangAuthors contributed equally to this work., Yuyuan; de La Harpe, Kimberly; Kohl, Forrest R.; Kohler, Bern
Source:
Chemical communications 2019 v.55 no.29 pp. 4174-4177
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; DNA; chemical reactions; deuterium oxide; solvents;     Show all 5 Subjects
Abstract:
... Changing the solvent from H₂O to D₂O dramatically affects the branching of the initial excited electronic states in an alternating G·C DNA duplex into two distinct decay channels. The slower, multisite PCET channel that deactivates more than half of all excited states in D₂O becomes six times weaker in H₂O. ...
DOI:
10.1039/c9cc01105f

20. Electrochemically-derived graphene oxide membranes with high stability and superior ionic sieving

Author:
Yu, Pei; Xiong, Zhiyuan; Zhan, Hualin; Xie, Ke; Zhong, Yu Lin; Simon, George P.; Li, Dan
Source:
Chemical communications 2019 v.55 no.28 pp. 4075-4078
ISSN:
1364-548X
Subject:
aqueous solutions,   etc   ; chemical reactions; chemical structure; graphene oxide; sieving;     Show all 5 Subjects
Abstract:
... Crosslinker-free electrochemically-derived graphene oxide membranes are found to be extraordinarily stable in aqueous solutions and exhibit superior ionic sieving performance because of their unique chemical structure. ...
DOI:
10.1039/c8cc09970g