PubAg

Main content area

You searched for: Subject "aqueous solutions" Remove constraint Subject: "aqueous solutions"
Start Over

Search

27,198  Search Results

« Previous | 1 - 20 of 27,198 |
Number of results to display per page

Search Results

1. The hydration properties of protein stabilizer, trimethylamine-N-oxide in aqueous solutions of N-methylacetamide—The volumetric and compressibility studies between 288.15 and 308.15 K

Author:
Kaczkowska, Emilia; Wawer, Jarosław; Tyczyńska, Magdalena; Jóźwiak, Małgorzata; Boruń, Agnieszka; Krakowiak, Joanna
Source:
Thermochimica acta 2020 v.685 pp. 178535
ISSN:
0040-6031
Subject:
aqueous solutions,   etc   ; compressibility; stabilizers; temperature;     Show all 4 Subjects
Abstract:
... Apparent molar volumes, VΦ, and apparent molar isentropic compressions, KS,Φ, of the protein stabilizer, trimethylamine-N-oxide (TMAO) were determined from the densities and speed of sound measured at T = (288.15, 298.15 and 308.15) K in aqueous solutions of N-methylacetamide (NMA) at four different concentrations (2, 4, 6 and 8 mol/kg). The concentration dependencies of the calculated quantities ...
DOI:
10.1016/j.tca.2020.178535

2. Correction to: Evaluation of hydroxyapatite/poly(acrylamide-acrylic acid) for sorptive removal of strontium ions from aqueous solution

Author:
Hassan, Hisham Soliman; El-Kamash, Ahmed Mohamed; Ibrahim, Haneen Abdel-Salam
Source:
Environmental science and pollution research international 2020 v.27 no.4 pp. 4553
ISSN:
0944-1344
Subject:
aqueous solutions,   etc   ; hydroxyapatite; ions; strontium;     Show all 4 Subjects
Abstract:
... The original publication of this paper contains a mistake. ...
DOI:
10.1007/s11356-019-07386-y

3. Dilution enthalpies of LiBO2 and LiB5O8 aqueous solutions at 298.15 K and the application of ion-interaction model

Author:
Yuan, Fei; Li, Long; Guo, Yafei; Deng, Tianlong
Source:
Thermochimica acta 2020 v.685 pp. 178506
ISSN:
0040-6031
Subject:
aqueous solutions,   etc   ; borates; enthalpy; lithium; models;     Show all 5 Subjects
Abstract:
... The dilution enthalpies of LiBO₂ (aq) from 0.0398 to 0.7684 mol·kg⁻¹ and LiB₅O₈ (aq) from 0.0521 to 0.8067 mol·kg⁻¹ at 298.15 K and 101.325 kPa were investigated using the microcalorimeter BT 2.15. The apparent molar enthalpies on two lithium borates were obtained, and the diagrams of their apparent molar enthalpy against molality for LiBO₂ (aq) and LiB₅O₈ (aq) were also plotted. Considering the c ...
DOI:
10.1016/j.tca.2019.178506

4. Enthalpies of dilution of amino alcohols in aqueous solutions at 298.15 K

Author:
Romero, Carmen M.; Cruz, Yadhi P.; Perez-Casas, Silvia
Source:
Thermochimica acta 2020 v.684 pp. 178490
ISSN:
0040-6031
Subject:
aqueous solutions,   etc   ; amino alcohols; enthalpy; solutes;     Show all 4 Subjects
Abstract:
... The enthalpies of dilution of aqueous solutions of the amino alcohols: 3-amino-1-propanol, (RS)-1-amino-2-propanol, (RS)-3-amino-1,2-propanediol, and 1,3-diamino-2-propanol were measured as a function of concentration at 298.15 K using a Thermal Activity Monitor (TAM). The results of the experimental measurements were treated according to the McMillan-Mayer theory, to obtain the enthalpic homogene ...
DOI:
10.1016/j.tca.2019.178490

5. Anisole-modified hyper-cross-linked resins for efficient adsorption of aniline from aqueous solution

Author:
Zeng, Xu; Huang, Jianhan
Source:
Journal of colloid and interface science 2020 v.569 pp. 177-183
ISSN:
0021-9797
Subject:
aqueous solutions,   etc   ; adsorption; aniline; chemical reactions; oxygen; resins; surface area;     Show all 7 Subjects
Abstract:
... The development of functionalized hyper-cross-linked resins (HCLRs) with high Brunauer-Emmett-Teller (BET) surface area (SBET) is of great importance. Herein, a kind of anisole-modified HCLRs was fabricated by two successive Friedel-Crafts reactions and it was used for the adsorption of aniline from aqueous solution. The resultant HCLRs owned high SBET and plentiful oxygen (O), with the values of ...
DOI:
10.1016/j.jcis.2020.02.082

6. Direct measurements of the reactivity of singlet oxygen to some persistent herbicides in aqueous solutions

Author:
Pozdnyakov, Ivan P.; Parkhats, Marina V.
Source:
Chemosphere 2020 v.247 pp. 125872
ISSN:
0045-6535
Subject:
aqueous solutions,   etc   ; herbicides; luminescence; oxidants; oxidation; singlet oxygen;     Show all 6 Subjects
Abstract:
... Reactivity of the singlet oxygen (SO), which is assumed to be one of the important oxidizers in natural waters, towards to a set of persistent herbicides, was measured for the first time using time resolved luminescence technique. It was observed that rate constants of SO reactions with the majority of studied herbicides are less than 10⁶ M⁻¹s⁻¹ allowing to conclude about negligible participation ...
DOI:
10.1016/j.chemosphere.2020.125872

7. High-performance 2.6 V aqueous symmetric supercapacitor based on porous boron-doped diamond via regrowth of diamond nanoparticles

Author:
Wang, Jian; He, Zhibing; Tan, Xiulan; Wang, Tao; Liu, Lei; He, Xiaoshan; Liu, Xu Dong; Zhang, Ling; Du, Kai
Source:
Carbon 2020 v.160 pp. 71-79
ISSN:
0008-6223
Subject:
aqueous solutions,   etc   ; capacitance; carbon electrodes; electrochemical capacitors; energy; nanoparticles; vapors;     Show all 7 Subjects
Abstract:
... Having a wider potential window and higher stability than other traditional sp²-based carbon electrodes, heavily boron-doped diamond (BDD) electrode with three-dimensional porous nanostructure can considerably enhance the specific capacitance, making it one of the most promising electrode materials. In the work, we present a simple and reproducible method to create such a porous BDD film by using ...
DOI:
10.1016/j.carbon.2020.01.004

8. Thermodynamic properties and structure transition in {water + tert-butanol} and {water + tert-butanol + iso-butanol} solutions

Author:
Li, Peiran; Wang, Xue; Chen, Yaling; Yin, Tianxiang; Shen, Weiguo
Source:
Thermochimica acta 2020 v.686 pp. 178548
ISSN:
0040-6031
Subject:
aqueous solutions,   etc   ; heat; indole butyric acid; light scattering; variance;     Show all 5 Subjects
Abstract:
... Different microscopic and thermodynamic properties like the resonance light scattering intensity, microenvironment polarity, the density and heat capacity of {water + TBA} binary solution and the density of {water + TBA + IBA} ternary solution were precisely measured. Formation and structure transitions of alcohol-water aggregate in TBA aqueous solution and {water + TBA + IBA} ternary solutions at ...
DOI:
10.1016/j.tca.2020.178548

9. Covalent Surface Modification of Cellulose-Based Textiles for Oil–Water Separation Applications

Author:
Dan, Yoav; Popowski, Yanay; Buzhor, Marina; Menashe, Eti; Rachmani, Oren; Amir, Elizabeth
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.13 pp. 5456-5465
ISSN:
1520-5045
Subject:
aqueous solutions,   etc   ; ambient temperature; fabrics; hydrophobicity; oils; process design; solvents;     Show all 7 Subjects
Abstract:
... A technically simple, one-step process for the preparation of hydrophobic cellulose-based fabrics via covalent surface modification is presented. A small aliphatic molecule was grafted onto the surface of various types of fabrics under mild processing conditions (room temperature, few seconds), leading to alteration of the surface properties. The modified fabrics displayed not only hydrophobic but ...
DOI:
10.1021/acs.iecr.9b05785

10. Thermodynamics of N-Isopropylacrylamide in Water: Insight from Experiments, Simulations, and Kirkwood–Buff Analysis Teamwork

Author:
Polák, Jakub; Ondo, Daniel; Heyda, Jan
Source:
TheJournal of physical chemistry 2020 v.124 no.12 pp. 2495-2504
ISSN:
1520-5207
Subject:
aqueous solutions,   etc   ; enthalpy; models; molecular dynamics; polymers; solubility; temperature;     Show all 7 Subjects
Abstract:
... The behavior of thermoresponsive polymer poly(N-isopropylacrylamide) (PNiPAM), an essential building block in the design of smart soft materials, in aqueous solutions has attracted much interest, which contrasts with our knowledge of N-isopropylacrylamide (NiPAM) monomer. Strikingly, the physicochemical properties of aqueous NiPAM are similarly rich, and their understanding is far from being compl ...
DOI:
10.1021/acs.jpcb.0c00413

11. First Investigations on the Removal of Tungsten Species from Water Using Multi-walled Carbon Nanotubes

Author:
Ihsanullah, Ihsanullah; Sajid, Muhammad; Kabeer, Muhamed; Shemsi, Ahsan Mushir; Atieh, Muataz Ali
Source:
Water, air, and soil pollution 2020 v.231 no.3 pp. 119
ISSN:
0049-6979
Subject:
aqueous solutions,   etc   ; adsorbents; adsorption; carbon nanotubes; models; pH; tungsten;     Show all 7 Subjects
Abstract:
... A first study on the adsorptive removal of tungsten species from the aqueous phase by using the multi-walled carbon nanotubes (MWCNTs) is reported. The MWCNTs were employed for the uptake of tungsten species at pH 6 in batch experiments. It was observed that 100% of tungsten species were removed in 2 h, by employing 75 mg of MWCNTs from the aqueous solution containing 10 ppm of tungsten. Adsorptio ...
DOI:
10.1007/s11270-020-04485-2

12. Water Compatible Hypophosphites-d₂ Reagents: Deuteration Reaction via Deutero-deiodination in Aqueous Solution

Author:
Song, Zejin; Zeng, Jing; Li, Ting; Zhao, Xiang; Fang, Jing; Meng, Lingkui; Wan, Qian
Source:
Organic letters 2020 v.22 no.5 pp. 1736-1741
ISSN:
1523-7052
Subject:
aqueous solutions,   etc   ; chemical reactions; chemical structure; organoiodine compounds; pH; solvents;     Show all 6 Subjects
Abstract:
... Contrary to conventional deuteration approaches which typically entail deuterated solvents and/or moisture exclusion, an unprecedented deutero-deiodination reaction attainable in aqueous (H₂O) solution is presented herein. By utilizing the stability of inorganic deuterated calcium/sodium hypophosphites against wayward H/D isotopic exchange within pH 2.5–11.7, these shelf-stable, nontoxic, cost-eff ...
DOI:
10.1021/acs.orglett.0c00001

13. Halide-induced dissolution of lead(IV) oxide in frozen solution

Author:
Menachery, Sunil Paul M.; Menacherry, Sunil Paul M.; Min, Dae Wi; Jeong, Daun; Aravindakumar, Charuvila T.; Lee, Woojin; Choi, Wonyong
Source:
Journal of hazardous materials 2020 v.384 pp. 121298
ISSN:
0304-3894
Subject:
aqueous solutions,   etc   ; chlorides; free radicals; ice; ions; lead; pH;     Show all 7 Subjects
Abstract:
... The dark dissolution behavior of plattnerite (ß-PbO₂) was investigated in frozen solutions containing halide ions and compared with those in aqueous solution. The amount of dissolved lead in the frozen solutions varied depending on the solution pH and the kind and concentration of halide ions. The presence of bromide and iodide ions enhanced the dissolution of lead in the aqueous phase, whereas th ...
DOI:
10.1016/j.jhazmat.2019.121298

14. Hydrogen Bond Dynamics in the Solvation Shell on Proton Transfer in Aqueous Solution

Author:
Zeng, Yonghui; Li, Ailin; Yan, Tianying
Source:
TheJournal of physical chemistry 2020 v.124 no.9 pp. 1817-1823
ISSN:
1520-5207
Subject:
aqueous solutions,   etc   ; hydrogen bonding; ligands; models; molecular dynamics; solvation;     Show all 6 Subjects
Abstract:
... Molecular dynamics (MD) simulations based on the multistate empirical valence bond model have been performed to study the proton transfer (PT) process in aqueous solution. This study focuses on the details of the hydrogen bond (HB) dynamics in the solvation shells of an excess proton accompanied by PT events. The HB dynamics analyses show that the three water molecules in the first solvation shell ...
DOI:
10.1021/acs.jpcb.0c00990

15. A study of Cr(VI) and NH4+adsorption using greensand (glauconite) as a low‐cost adsorbent from aqueous solutions

Author:
Naghipour, Dariush; Taghavi, Kamran; Ashournia, Mehdi; Jaafari, Jalil; Arjmand Movarrekh, Ramin
Source:
Water and environment journal 2020 v.34 no.1 pp. 45-56
ISSN:
1747-6585
Subject:
aqueous solutions,   etc   ; adsorbents; adsorption; ammonium; chromium; models; pH; sorption isotherms;     Show all 8 Subjects
Abstract:
... This paper investigates the removal of Cr(VI) and NH⁴⁺ from aqueous solutions using greensand (glauconite). The effects of adsorbent dosage, contact time, initial Cr(VI) and NH⁴⁺ concentrations, and pH were investigated in batch experiments. The results show that these parameters influenced Cr(VI) and NH⁴⁺ removal using glauconite considerably. Pseudo‐first‐order, pseudo‐second‐order and intrapart ...
DOI:
10.1111/wej.12440

16. Enhanced Adsorption of Doxycycline Hydrochloride (DCH) from Water on Zeolitic Imidazolate Framework-8 Modified by Cu2+ (Cu–ZIF-8)

Author:
Zhang, Jingli; Liu, Kexin
Source:
Water, air, and soil pollution 2020 v.231 no.2 pp. 91
ISSN:
0049-6979
Subject:
aqueous solutions,   etc   ; adsorption; copper; cupric nitrate; doxycycline; ethanol; porous media;     Show all 7 Subjects
Abstract:
... In this study, Cu-ZIF-8, zeolitic imidazolate framework-8 surface modified by Cu²⁺, was synthesized easily in one-pot method with Cu(NO₃)₂·3H₂O addition in ZIF-8 crystal preparation. The Cu-ZIF-8 as-synthesized turned to light pink from white ZIF-8. The Cu-ZIF-8 particles were in good crystal morphology with the uniform size of approximately 400 nm, and Cu-ZIF-8 was a typical microporous material. ...
DOI:
10.1007/s11270-020-4455-8

17. Thermal stability and specific heats of coordinating ionic liquids

Author:
Monteiro, Bernardo; Maria, Leonor; Cruz, Adelaide; Carretas, José M.; Marçalo, Joaquim; Leal, João P.
Source:
Thermochimica acta 2020 v.684 pp. 178482
ISSN:
0040-6031
Subject:
aqueous solutions,   etc   ; ionic liquids; metals; specific heat; temperature; thermal stability;     Show all 6 Subjects
Abstract:
... Ionic liquids (ILs) have been revealed as promising solvents, namelly for the selective extraction of metals from aqueous solutions. ILs extractive properties can be trimmed but to do that in a programmed and educated way it is necessary to know their basic properties. The range of temperature in which they can be used as solvents as well as their specific heat, necessary to perform thermodynamic ...
DOI:
10.1016/j.tca.2019.178482

18. Dynamic Properties of the Photosensory Domain of Deinococcus radiodurans Bacteriophytochrome

Author:
Battocchio, Giovanni; González, Ronald; Rao, Aditya G.; Schapiro, Igor; Mroginski, Maria Andrea
Source:
TheJournal of physical chemistry 2020 v.124 no.9 pp. 1740-1750
ISSN:
1520-5207
Subject:
aqueous solutions,   etc   ; Deinococcus radiodurans; molecular dynamics; photoreceptors; phytochrome; spectral analysis;     Show all 6 Subjects
Abstract:
... Phytochromes are biological photoreceptors found in all kingdoms of life. Numerous physicochemical and spectroscopic studies of phytochromes have been carried out for many decades, both experimentally and computationally, with the main focus on the photoconversion mechanism involving a tetrapyrrole chromophore. In this computational work, we concentrate on the long-scale dynamic motion of the phot ...
DOI:
10.1021/acs.jpcb.0c00612

19. Aqueous solution synthesis of Na₃SbS₄–Na₂WS₄ superionic conductors

Author:
Yubuchi, So; Ito, Akane; Masuzawa, Naoki; Sakuda, Atsushi; Hayashi, Akitoshi; Tatsumisago, Masahiro
Source:
Journal of materials chemistry A 2020 v.8 no.4 pp. 1947-1954
ISSN:
2050-7496
Subject:
aqueous solutions,   etc   ; antimony; batteries; electrolytes; sodium; sulfides; tungsten;     Show all 7 Subjects
Abstract:
... We report a route for the synthesis of Na₃SbS₄–Na₂WS₄ superionic conductors from aqueous solution. Na₃SbS₄–Na₂WS₄ has the highest high sodium-ion conductivity (4.28 mS cm⁻¹ at 25 °C) of reported sulfide-based solid electrolytes prepared via liquid-phase methods. The antimony in Na₃SbS₄ is replaced by tungsten in a higher valence state, which is charge-compensated by sodium vacancies in the form Na ...
DOI:
10.1039/c9ta02246e

20. Quantitative SERS Assay on a Single Chip Enabled by Electrochemically Assisted Regeneration: A Method for Detection of Melamine in Milk

Author:
Viehrig, Marlitt; Rajendran, Sriram T.; Sanger, Kuldeep; Schmidt, Michael S.; Alstrøm, Tommy S.; Rindzevicius, Tomas; Zór, Kinga; Boisen, Anja
Source:
Analytical chemistry 2020 v.92 no.6 pp. 4317-4325
ISSN:
1520-6882
Subject:
aqueous solutions,   etc   ; Raman spectroscopy; detection limit; electrochemistry; melamine; milk;     Show all 6 Subjects
Abstract:
... Reusability of sensors is relevant when aiming to decrease variation between measurements, as well as cost and time of analysis. We present an electrochemically assisted surface-enhanced Raman spectroscopy (SERS) platform with the capability to reverse the analyte–surface interaction, without damaging the SERS substrate, allowing for efficient sensor reuse. The platform was used in combination wit ...
DOI:
10.1021/acs.analchem.9b05060