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1. "On-off" switching of dynamically controllable self-assembly formation of double-responsive block copolymers with tunable LCSTs

Author:
Kotsuchibashi, Youhei; Ebara, Mitsuhiro; Yamamoto, Kazuya; Aoyagi, Takao
Source:
Journal of polymer science 2010 v.48 no.20 pp. 4393-4399
ISSN:
0887-624X
Subject:
acrylamides; ambient temperature; aqueous solutions; composite polymers; drug delivery systems; drugs; fluorescence; heat; hydrophobicity; light scattering; micelles; nuclear magnetic resonance spectroscopy; polymerization; scanning electron microscopy
Abstract:
... We report here a reversible self-assembly formation system using block copolymers with thermo-tunable properties. A series of double-responsive block copolymers, poly(N-isopropylacrylamide (NIPAAm))-block-poly(NIPAAm-co-N-(isobutoxymethyl)acrylamide (BMAAm)) with two lower critical solution temperatures were synthesized by one-pot atom transfer radical polymerization via sequential monomer additio ...
DOI:
10.1002/pola.24226

2. 'In-line attack' conformational effect plays a modest role in an enzyme-catalyzed RNA cleavage: a free energy simulation study

Author:
Min, Donghong; Xue, Song; Li, Hong; Yang, Wei
Source:
Nucleic acids research 2007 v.35 no.12 pp. 4001-4006
ISSN:
0305-1048
Subject:
Gibbs free energy; RNA; adenosine triphosphate; aqueous solutions; catalytic activity; energy; enzyme substrates; enzymes; oligonucleotides
Abstract:
... Since the proposal of 'in-line attack' conformation as a possibly important intermediate in RNA cleavage, its structure has been captured in various protein and RNA enzymes; these structures strengthen the belief that this conformation plays an essential role in the catalysis of RNA cleavage. As generally discussed, this intermediate structure can be involved in energy barrier reduction in two pos ...
DOI:
10.1093/nar/gkm394
PubMed:
17553832
PubMed Central:
PMC1919504

3. (1,2-DAPH2)2Ge9(OH)4O18 · 2H2O: A New Microporous Germanate Based on the Interconnection of Ge9O18 Clusters Showing Reversible Water Emission and Uptake

Author:
Dragan Pitzschke; Christian Näther; Wolfgang Bensch
Source:
Zeitschrift für Naturforschung 2014 v.58 no.2-3 pp. 205-210
ISSN:
0932-0776
Subject:
X-ray diffraction; aqueous solutions; cations; crystals; geometry; germanium; porous media; shrinkage; skeleton
Abstract:
... Treatment of germanium dioxide with a 33% aqueous solution of 1,2-diaminopropane (DAP) under solvothermal conditions leads to the formation of colourless octahedral crystals of the novel germanate (1,2-DAPH₂)₂Ge₉(OH)₄O₁₈ · 2 H₂O. The compound crystallises in the orthorhombic space group Pbca, a = 14.4155(10), b = 12.9384(9), c = 14.5417(8) Å,V =2712.2 (3) ų; Z =4. The structure consists of an ani ...
DOI:
10.1515/znb-2003-2-301

4. (2,2′-Bipyridyl)-3-3′-diol in Nafion: Stabilization of Unusual Ground and Excited States

Author:
Iyer E. Siva Subramaniam; Datta Anindya
Source:
Journal of physical chemistry 2012 v.116 no.17 pp. 5302-5307
ISSN:
1520-5207
Subject:
aqueous solutions; benzimidazole; coumarin; electrostatic interactions; fluorescent dyes; models; physical chemistry; protons; water content
Abstract:
... (2,2′-Bipyridyl)-3-3′-diol (BP(OH)₂) undergoes excited state intramolecular double proton transfer (ESIDPT). The photophysics of this molecule has been investigated, in the highly acidic water channels inside nafion membrane. The dianionic enolate form of the dye, which is formed only in alkaline conditions in neat aqueous solutions, is found to be present in its excited state in native nafion mem ...
DOI:
10.1021/jp301034v

5. (3-Aminopropyl)triethoxysilane and iron rice straw biochar composites for the sorption of Cr (VI) and Zn (II) using the extract of heavy metals contaminated soil

Author:
Isha Medha; Subhash Chandra; Kumar Raja Vanapalli; Biswajit Samal; Jayanta Bhattacharya; Bidus Kanti Das
Source:
Science of the total environment 2021 v.771 pp. 144764
ISSN:
0048-9697
Subject:
adsorption; animal and human health; aqueous solutions; biochar; environment; iron; mined soils; mitosis; polluted soils; pyrolysis; rice straw; soil fertility; sorption isotherms; toxicity
Abstract:
... Heavy metals like Cr (VI), when released into the environment, pose a serious threat to animal and human health. In this study, iron and (3-Aminopropyl)triethoxysilane (APTES) biochar composites were prepared from the biochar, which was produced through the pyrolysis of rice straw at 400 and 600 °C, using the chemical processes with an aim that the doping of pristine biochar structure with the Fe ...
DOI:
10.1016/j.scitotenv.2020.144764

6. (MeSn)4Se6, Geometrie und Schwingungsformen eines Adamantan-Gerüstes aus Zinn-Selen-Bindungen / (MeSn)4Se6, Geometry and Vibrational Modes of an Adamantane Framework Formed by Tin-Selenium Bonds

Author:
Axel Blecher; Martin Dräger; Bernd Mathiasch
Source:
Zeitschrift für Naturforschung 2014 v.36 no.11 pp. 1361-1367
ISSN:
0932-0776
Subject:
X-radiation; aqueous solutions; energy; geometry
Abstract:
... The title compound has been synthesized by reaction of MeSnBr₃ and NaHSe in aqueous solution. The X-ray structure determination showed adamantane-like molecules (Sn-Se 253(1), Sn-C 215(1) pm) arranged in a quasi hexagonal-close packing. The atomic coordinates were used for an analysis of the vibrational spectra, yielding information on the distribution of the potential energy for the normal modes ...
DOI:
10.1515/znb-1981-1103

7. +(−)Catechin raises body temperature, changes blood parameters, improves oocyte quality and reproductive performance of female mice

Author:
A.A. Mohammed; A.A. Al-Hozab
Source:
Indian journal of animal research 2020 v.54 no.5 pp. 543-548
ISSN:
0976-0555
Subject:
adverse effects; albino; anesthesia; aqueous solutions; blood composition; body temperature; catechin; females; glucose; heart rate; hypoglycemia; leukocytes; mice; oocytes; oxygen; reproductive performance
Abstract:
... The present study aimed to explore changes in physiological and reproductive performances upon supplementation of +(−) cactechin (200 vs. 2000 mg/kg BW) in mice. In addition, body temperature, heart rate, blood oxygen and glucose were explored after general anesthesia of +(−)cactechin animals. Sixty albino female mice were classified into three groups; control group (G1) versus two +(−) cactechin ...
DOI:
10.18805/ijar.B-981

8. 001 Milestones in cryobiology

Author:
Stanley Leibo
Source:
Cryobiology 2013 v.67 no.3 pp. 398
ISSN:
0011-2240
Subject:
Nematoda; aqueous solutions; calves; children; cooling; cryopreservation; cryptobiosis; crystals; drying; embryo (animal); erythrocytes; fish; freezing; glycerol; helium; humans; ice; liquids; medicine; metabolism; mice; microorganisms; nitrogen; plants (botany); roosters; snow; spermatozoa; temperature; thawing; tissues; vitrification; Germany
Abstract:
... Cryobiology is a discipline that has its origins in experiments that were published exactly 350 years ago. In 1663, Henry Power, a British physician, reported that he had used a mixture of snow and salt to freeze nematodes. When he thawed the samples three hours later, he stated that “all my little Animals made their re-appearance and danced and frisked about as lively as ever.” Over the centuries ...
DOI:
10.1016/j.cryobiol.2013.09.007

9. 038 What determines the temperature of ice crystallization?

Author:
Valeria Molinero
Source:
Cryobiology 2013 v.67 no.3 pp. 409
ISSN:
0011-2240
Subject:
aqueous solutions; climate; crystallization; density; freezing; frost; glass; ice; liquids; molecular dynamics; prediction; temperature; thermodynamics; water activity
Abstract:
... Predicting the temperature and extent of ice freezing in aqueous solutions is crucial for areas as diverse as cryobiology, the prediction of climate and materials design. It has long been recognized that the thermodynamics of liquid water controls temperature and kinetics of ice crystallization. Parameterizations of the freezing temperatures in terms of the water activity of the solution have been ...
DOI:
10.1016/j.cryobiol.2013.09.044

10. 040 Metastable vitrification of cryoprotectant solutions

Author:
Brian Wowk
Source:
Cryobiology 2013 v.67 no.3 pp. 409
ISSN:
0011-2240
Subject:
aqueous solutions; cold; cooling; cryopreservation; cryoprotectants; crystallization; freezing; ice; ice nucleation; liquids; melting point; separation; solutes; temperature; vitrification; water activity; water content
Abstract:
... Vitrification is a phenomenon in which liquids take on the physical properties of a solid while retaining the structure of a liquid on a molecular scale. When aqueous solutions vitrify, a solid state is achieved without phase separation or crystallization. Cytoplasmic vitrification is believed to occur during almost all forms of cryopreservation. Metastable vitrification is a cryopreservation proc ...
DOI:
10.1016/j.cryobiol.2013.09.046

11. 059 Role of cryopreservation in the clinical delivery of T cell based adoptive cell therapies (ACT)

Author:
Ryan D. Guest; Dominic G. Rothwell; Natalia Kirillova; Sam Mowbray; Vicky Sheard; Stephanie Gibbons; Elizabeth Acton; David Gilham; G. John Morris; Robert Hawkins
Source:
Cryobiology 2013 v.67 no.3 pp. 414
ISSN:
0011-2240
Subject:
B-cell lymphoma; T-lymphocytes; antigens; aqueous solutions; blood serum; cryopreservation; freezing; hospitals; ice nucleation; immunotherapy; in vitro fertilization; manufacturing; melanoma; melting point; metastasis; oocytes; patients; receptors; viability
Abstract:
... The development of Adoptive Cell Therapy (ACT) based immunotherapies using either naturally-occurring or genetically engineered T cells to target tumours have reached a stage where the approach is delivering clinically significant results in: [1] gene engineered T cells using either Chimeric Antigen Receptors (CAR) in B cell lymphoma or tumour specific T cell receptors in metastatic melanoma or me ...
DOI:
10.1016/j.cryobiol.2013.09.065

12. 1,1′-Dimethyl-4,4′-bipyridinium-smectites as a novel adsorbent of phenols from water through charge-transfer interactions

Author:
Tomohiko Okada; Makoto Ogawa
Source:
Chemical communications 2003 v. no.12 pp. 1378-1379
ISSN:
1364-548X
Subject:
2,4-dichlorophenol; adsorbents; adsorption; aqueous solutions; chemical reactions; color; smectite
Abstract:
... The adsorption of 2,4-dichlorophenol onto the 1,1′-dimethyl-4,4′-bipyridinium-saponite, a smectite group of clay minerals, from dilute aqueous solution occurred effectively through charge-transfer interactions and such interactions resulted in the change in the color of the 1,1′-dimethyl-4,4′-bipyridinium-saponite. ...
DOI:
10.1039/b302144k

13. 1,2,3,4-Tetrahydropyrimidine Derivative for Selective and Fast Uptake of Cadmium Ions from Aqueous Solution

Author:
Mohamed Ould M’hamed; Lotfi Khezami
Source:
Environments 2019 v.6 no.6 pp. -
ISSN:
2076-3298
Subject:
adsorption; aqueous solutions; cadmium; endothermy; entropy; equations; heavy metals; heterocyclic compounds; metal ions; milling; nuclear magnetic resonance spectroscopy; pH; sorption isotherms; toxicity
Abstract:
... The aim of this work was to evaluate the performance of a 1,2,3,4-tetrahydropyrimidine derivative as a powerful heterocyclic compound for the elimination of Cd(II) ions from aqueous solutions. The tetrahydropyrimidine derivative was prepared during 30 min of milling by planetary ball mill with a ball-to-powder mass ratio of 8:1 and a rotation speed of 750 rpm. Nuclear magnetic resonance (NMR) and ...
DOI:
10.3390/environments6060068

14. 1,2-Dithiolane-Derived Dynamic, Covalent Materials: Cooperative Self-Assembly and Reversible Cross-Linking

Author:
Zhang Xiangyi; Waymouth Robert M.
Source:
Journal of the American Chemical Society 2017 v.139 no.10 pp. 3822-3833
ISSN:
1520-5126
Subject:
aqueous solutions; composite polymers; crosslinking; ethylene oxide; gelation; hydrogels; lipoic acid; micelles; polyethylene glycol; polymerization; thiols
Abstract:
... The use of dithiolane-containing polymers to construct responsive and dynamic networks is an attractive strategy in material design. Here, we provide a detailed mechanistic study on the self-assembly and gelation behavior of a class of ABA triblock copolymers containing a central poly(ethylene oxide) block and terminal polycarbonate blocks with pendant 1,2-dithiolane functionalities. In aqueous so ...
DOI:
10.1021/jacs.7b00039

15. 1,3,5-triazine-triethylenetetramine polymer: an efficient adsorbent for removal of Cr(VI) ions from aqueous solution

Author:
Sezen Sivrikaya; Elif Cerrahoglu; Mustafa Imamoglu; Mustafa Arslan
Source:
Toxicological and environmental chemistry 2013 v.95 no.6 pp. 899-908
ISSN:
1029-0486
Subject:
adsorbents; adsorption; aqueous solutions; chromium; heat production; infrared spectroscopy; ions; pH; polymers; sorption isotherms; temperature
Abstract:
... The synthesis of 1,3,5-triazine-triethylenetetramine (TATETA), its characterization by infrared spectroscopy and elemental analysis, and its application for removal of Cr(VI) ions from aqueous solution is reported. The effects of pH, contact time, initial concentration of Cr(VI), sorbent dose, and temperature on adsorption were investigated and optimized by batch adsorption experiments. Adsorption ...
DOI:
10.1080/02772248.2013.840373

16. 1,4-Dihydroxyanthraquinone–Cu²⁺ ensemble probe for selective detection of sulfide anion in aqueous solution

Author:
Yu Wang; Huanhe Sun; Lingjie Hou; Zhuobin Shang; Zhenming Dong; Weijun Jin
Source:
Analytical methods 2013 v.5 no.20 pp. 5493-5500
ISSN:
1759-9679
Subject:
analytical methods; anions; aqueous solutions; color; copper; detection limit; ethanol; fluorescence; quinones; sulfides
Abstract:
... Based on the displacement strategy, a new and simple sulfide-selective chemosignaling system was devised using 1,4-dihydroxyanthraquinone (DHAQ)–Cu²⁺ ensemble. In aqueous solution containing 10% ethanol (HEPES buffer, pH7.4), DHAQ could give rise to a visible yellow-to-pink color change with the addition of Cu²⁺. The resulting pink solution changed to yellow upon subsequent addition of sulfide ani ...
DOI:
10.1039/c3ay40977e

17. 1,8-Naphthalimide modified [12]aneN3 compounds as selective and sensitive probes for Cu2+ ions and ATP in aqueous solution and living cells

Author:
Yong-Guang Gao; Quan Tang; You-Di Shi; Ying Zhang; Zhong-Lin Lu
Source:
Talanta 2016 v.152 pp. 438-446
ISSN:
0039-9140
Subject:
adenosine triphosphate; aqueous solutions; copper; cytotoxicity; fluorescence; fluorescent dyes; human cell lines; image analysis; metal ions; titration; water solubility
Abstract:
... A new fluorescent probe 1 featuring one 1,8-naphthalimide and two [12]aneN3 units was synthesized. In the presence of Cu²⁺ ions, the fluorescence emission of 1 was quenched by a factor of 127-fold and no interference by other metal ions was observed under physiological conditions. By means of titration and a Job's plot it was established that 1 forms a complex with Cu²⁺ ions in a 1:2 ratio. The fl ...
DOI:
10.1016/j.talanta.2016.02.040

18. 1-Butanol as a Solvent for Efficient Extraction of Polar Compounds from Aqueous Medium: Theoretical and Practical Aspects

Author:
Gerhard König; Manfred T. Reetz; Walter Thiel
Source:
Journal of physical chemistry 2018 v.122 no.27 pp. 6975-6988
ISSN:
1520-5207
Subject:
Gibbs free energy; aqueous solutions; butanol; ethyl acetate; micelles; nanomaterials; partition coefficients; polar compounds; prediction; solutes; solvents
Abstract:
... The extraction of polar molecules from aqueous solution is a challenging task in organic synthesis. 1-Butanol has been used sporadically as an eluent for polar molecules, but it is unclear which molecular features drive its efficiency. Here, we employ free energy simulations to study the partitioning of 15 solutes between water and 1-butanol. The simulations demonstrate that the high affinity of p ...
DOI:
10.1021/acs.jpcb.8b02877

19. 1-Butanol pervaporation performance and intrinsic stability of phosphonium and ammonium ionic liquid-based supported liquid membranes

Author:
Hercules R. Cascon; Santosh K. Choudhari
Source:
Journal of membrane science 2013 v.429 no. pp. 214-224
ISSN:
0376-7388
Subject:
activation energy; ambient temperature; aqueous solutions; diffusivity; hydrophobicity; ionic liquids; liquid membranes; oleyl alcohols; pervaporation; sorption; viscosity
Abstract:
... The intrinsic stabilities of simple supported liquid membranes and their pervaporative recoveries of 1-butanol from dilute aqueous solutions were investigated. Hydrophobic ammonium- and phosphonium-based room temperature ionic liquids were used as the liquid membranes. The membranes performed better than or comparably to other pervaporation membranes. 1-Butanol flux was highly positively correlate ...
DOI:
10.1016/j.memsci.2012.11.028

20. 1-Ethyl-3-methylimidazolium ethylsulfate/copper(II) as catalyst for lucigenin chemiluminescence and its application to glucose detection

Author:
S. O. Alijanpour; R. Akhoondi; M. J. Chaichi
Source:
Journal of analytical chemistry 2017 v.72 no.1 pp. 120-127
ISSN:
1061-9348
Subject:
aqueous solutions; catalysts; chemiluminescence; colorimetry; copper; enzymatic reactions; glucose; glucose oxidase; hydrogen peroxide; ionic liquids; pH; patients; solubility; spectroscopy; urine
Abstract:
... The present study reports the effect of an ionic liquid (IL), 1-ethyl-3-methylimidazolium ethylsulfate ([Emim][EtSO ₄]), on the Cu2+-catalyzed lucigenin/H₂O₂ chemiluminescence system in the range of pH 6.5‒10. At pH 8.0, the greatest enhancement on light emission is observed, related to a strong interaction between Cu²⁺ and the imidazolium ring at this pH. Furthermore, the formation of IL microdom ...
DOI:
10.1134/S1061934817010026

21. 1-methylimidazole as a novel additive for reverse osmosis membrane with high flux-rejection combinations and good stability

Author:
Yingying Liu; Wentao Yan; Zhi Wang; Huihui Wang; Song Zhao; Jixiao Wang; Peng Zhang; Xingzhong Cao
Source:
Journal of membrane science 2020 v.599 pp. 117830
ISSN:
0376-7388
Subject:
aqueous solutions; artificial membranes; carboxylic acids; cleaning; desalination; hydrolysis; organochlorine compounds; pH stability; polyamides; polymerization; reverse osmosis; sodium chloride; trimesoyl chloride
Abstract:
... A novel aqueous solution additive, 1-methylimidazole (1-MI), was applied to prepare aromatic polyamide (PA) reverse osmosis (RO) membranes with excellent performance by interfacial polymerization of trimesoyl chloride (TMC) and m-phenylenediamine. The RO membrane structure and performance were characterized in detail. The results indicated that the addition of 1-MI was beneficial to forming the me ...
DOI:
10.1016/j.memsci.2020.117830

22. 10 kg scaled-up preparation of Al/Fe-pillared clay CWPO catalysts from concentrated precursors

Author:
Helir-Joseph Muñoz; Carlos Vallejo; Carolina Blanco; Antonio Gil; Miguel-Ángel Vicente; José-Herney Ramírez; Luis-Alejandro Galeano
Source:
Green chemistry 2018 v.20 no.22 pp. 5196-5208
ISSN:
1463-9270
Subject:
aluminum; aqueous solutions; bentonite; catalysts; catalytic activity; clay; green chemistry; iron; leaching; mineralization; mixing; models; oxidation; pH; particle size; phenol; refining; surface area; temperature; toxicity; washing
Abstract:
... In this work, the significant intensification of a bentonite pillaring process was achieved by using a novel methodological approach, leading to an intercalating Al/Fe mixed oligomeric precursor, around 100 times more concentrated than usually reported. In addition, the intercalating step was achieved directly on the clay with no previous swelling of the mineral being required; this allowed the su ...
DOI:
10.1039/c8gc02445f

23. 110th Anniversary: Distribution Coefficients of Furfural and 5-Hydroxymethylfurfural in Hydrophobic Deep Eutectic Solvent + Water Systems: Experiments and Perturbed-Chain Statistical Associating Fluid Theory Predictions

Author:
Carin H. J. T. Dietz; Fausto Gallucci; Martin van Sint Annaland; Christoph Held; Maaike C. Kroon
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.10 pp. 4240-4247
ISSN:
1520-5045
Subject:
aqueous solutions; bioplastics; biorefining; furfural; hydrophobicity; hydroxymethylfurfural; prediction; process design; renewable resources; solvents; sugars; toluene
Abstract:
... Furfural (FF) and 5-hydroxymethylfurfural (HMF) are intermediates for many products, such as monomers for bioplastics, and can be obtained from various renewable resources. The isolation of these sugar-derived molecules from aqueous solutions is one of the main challenges in biorefinery processes. In the work described in this paper, the separation of FF and HMF from aqueous phases is carried out ...
DOI:
10.1021/acs.iecr.8b06234

24. 110th Anniversary: Polyamide/Metal–Organic Framework Bilayered Thin Film Composite Membranes for the Removal of Pharmaceutical Compounds from Water

Author:
Lorena Paseta; Daniel Antorán; Joaquín Coronas; Carlos Téllez
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.10 pp. 4222-4230
ISSN:
1520-5045
Subject:
aqueous solutions; diclofenac; drugs; hydrophilicity; nanocomposites; nanofiltration; polyamides; polymerization; porosity; process design; roughness; thin film composite membranes
Abstract:
... Nanofiltration can be a useful tool to remove pharmaceuticals in water sources. The performance of the most used thin film composite (TFC) membranes, typically with a thin polyamide (PA) layer, can be improved using thin film nanocomposite (TFN) membranes obtained by the introduction of a filler within the PA layer. In this work, to control the positioning of the filler two kinds of PA/metal–organ ...
DOI:
10.1021/acs.iecr.8b06017

25. 119Sn Mössbauer and Ferromagnetic Studies on Hierarchical Tin- and Nitrogen-Codoped TiO2 Microspheres with Efficient Photocatalytic Performance

Author:
Ayyakannu Sundaram Ganeshraja; Yang Minghui; Nomura Kiyoshi; Maniarasu Suresh; Veerappan Ganapathy; Liu Tao; Wang Junhu
Source:
The Journal of Physical Chemistry C 2017 v.121 no.12 pp. 6662-6673
ISSN:
1932-7455
Subject:
ambient temperature; aqueous solutions; hot water treatment; magnetic fields; microparticles; nitrogen; oxygen; photocatalysis; photovoltaic cells; physical chemistry; spectroscopy; tin; titanium dioxide
Abstract:
... Hierarchical tin-doped titania (ST) and tin- and nitrogen-codoped titania (SNT) microspheres were prepared by a hydrothermal method and nitriding treatment, in particular, SNT-enhanced visible light photocatalytic activity for the degradation of rhodamine B in aqueous solution and room-temperature ferromagnetism (RTFM). We initiated the photovoltaic study of ST and SNT microspheres to confirm the ...
DOI:
10.1021/acs.jpcc.6b12397

26. 11B—NMR- spektroskopische Untersuchungen an wäßrigen Polyboratlösungen / 11B NMR Spectroscopic Studies on Aqueous Polyborate Solutions

Author:
Ralf Janda; Gert Heller
Source:
Zeitschrift für Naturforschung B 2014 v.34 no.8 pp. 1078-1083
ISSN:
1865-7117
Subject:
ammonium; aqueous solutions; hydrolysis; nuclear magnetic resonance spectroscopy; pH; potassium; sodium; spectral analysis
Abstract:
... The ¹¹B nuclear magnetic resonance spectra of sodium, potassium and ammonium polyborates in aqueous solutions, - as a function of concentration and pH - , provide information of the hydrolysis equilibria. Two ¹¹B NMR lines are observed in aqueous solutions of Na[B₅O₆(OH)₄], K[B₅O₆(OH)₄] and NH₄[B₅O₆(OH)₄]. Only one ¹¹B NMR line is recorded in aqueous solutions of (NH₄)₂[B₄O₅(OH)₄] and Na₂[B₄O₅(OH) ...
DOI:
10.1515/znb-1979-0808

27. 134 Fundamentals of ice formation during rapid cooling and warming

Author:
Matthew Warkentin; Jesse B. Hopkins; James P. Sethna; Robert E. Thorne
Source:
Cryobiology 2013 v.67 no.3 pp. 436
ISSN:
0011-2240
Subject:
aqueous solutions; cooling; cryopreservation; cryoprotectants; glass; ice; ice nucleation; models; solutes; vitrification
Abstract:
... We have examined ice formation in aqueous solutions containing common cryoprotectants during cooling and warming at rates from ∼10K/s to >10,000K/s. For all solutes tested, the critical cooling rate below which ice forms varies exponentially with solute concentration. The exponential’s characteristic concentration for each solute correlates with the solute’s Stokes radius. We have developed a simp ...
DOI:
10.1016/j.cryobiol.2013.09.140

28. 13C-Labeled Idohexopyranosyl Rings: Effects of Methyl Glycosidation and C6 Oxidation on Ring Conformational Equilibria

Author:
Bose-Basu Bidisha; Zhang Wenhui; Kennedy Jamie L. W.; Hadad Matthew J.; Carmichael Ian; Serianni Anthony S.
Source:
Journal of organic chemistry 2017 v.82 no.3 pp. 1356-1370
ISSN:
1520-6904
Subject:
aqueous solutions; chemical structure; conformational isomerization; methodology; molecular dynamics; organic chemistry; organic compounds; oxidation; pH
Abstract:
... An ensemble of JHH, JCH, and JCC values was measured in aqueous solutions of methyl α- and β-d-idohexopyranosides containing selective ¹³C-enrichment at various carbons. By comparing these J-couplings to those reported previously in the α- and β-d-idohexopyranoses, methyl glycosidation was found to affect ring conformational equilibria, with the percentages of ⁴C₁ forms based on ³JHH analysis as f ...
DOI:
10.1021/acs.joc.6b02399

29. 177Lu-DOTA-coupled minigastrin peptides: promising theranostic agents in neuroendocrine cancers

Author:
Syed Faheem Askari Rizvi; Syed Ali Raza Naqvi; Samina Roohi; Tauqir A. Sherazi; Rashid Rasheed
Source:
Molecular biology reports 2018 v.45 no.6 pp. 1759-1767
ISSN:
0301-4851
Subject:
ammonium acetate; animal models; aqueous solutions; blood serum; chromatography; filtration; gastrins; glomerular filtration rate; kidneys; liver; mixing; neoplasm cells; neoplasms; pH; patients; peptide receptors; photons; rabbits; rats; scintigraphy; shelf life; therapeutics
Abstract:
... Treatment with radionuclide labeled regulatory peptides is a promising tool in the management of patients with inoperable receptor positive neuroendocrine tumors. Peptide receptor lutetium-177 radionuclide therapy currently has gained ample attention due to high specific accumulation of regulatory peptides at tumor cell surface and promising characteristics of β- and γ-energy photons of lutetium-1 ...
DOI:
10.1007/s11033-018-4319-0

30. 1D nanofiber composites of perylene diimides for visible-light-driven hydrogen evolution from water

Author:
Shuai Chen; Daniel L. Jacobs; Jingkun Xu; Yingxuan Li; Chuanyi Wang; Ling Zang
Source:
RSC advances 2014 v.4 no.89 pp. 48486-48491
ISSN:
2046-2069
Subject:
aqueous solutions; catalysts; hydrogen production; irradiation; light; methanol; moieties; nanocomposites; nanofibers; photocatalysis; semiconductors; titanium dioxide
Abstract:
... A series of novel nanocomposite structures have been fabricated by in situ deposition of TiO₂ layers and/or a co-catalyst (Pt) on one-dimensional (1D) self-assembled nanofibers of perylene diimide derivatives (PDIs). The PDI molecules were functionalized with dodecyl and/or phenylamino groups to compare the effect of nanofiber morphology and intramolecular charge transfer on the photocatalytic per ...
DOI:
10.1039/c4ra09258a

31. 1D oriented attachment of calcite nanocrystals: formation of single-crystalline rods through collision

Author:
Mihiro Takasaki; Yuki Kimura; Tomoya Yamazaki; Yuya Oaki; Hiroaki Imai
Source:
RSC advances 2016 v.6 no.66 pp. 61346-61350
ISSN:
2046-2069
Subject:
ambient temperature; aqueous solutions; biomimetics; calcite; calcium carbonate; calcium hydroxide; carbonation; mineralization; mixing; nanocrystals; pH
Abstract:
... The oriented attachment of calcite, which is a main component of biominerals, was experimentally demonstrated in an aqueous system at ambient temperatures. Calcite nanoblocks ∼50 nm in size were prepared by carbonation of Ca(OH)₂. One-dimensional (1D) alignment of the calcite nanoblocks was induced at ambient temperatures under a basic condition (pH ∼ 12), and single-crystalline rods over 1 µm wer ...
DOI:
10.1039/c6ra09452j

32. 1D/2D constructed Bi2S3/Bi2O2CO3 direct Z-Scheme heterojunction: A versatile photocatalytic material for boosted photodegradation, photoreduction and photoelectrochemical detection of water-based contaminants

Author:
Sangeeta Adhikari; Sandip Mandal; Do-Heyoung Kim
Source:
Journal of hazardous materials 2021 v.418 pp. 126263
ISSN:
0304-3894
Subject:
absorption; aqueous solutions; catalysts; chromium; electric field; irradiation; light; oxidation; photocatalysis; photolysis; photoreduction; tetracycline; thiourea
Abstract:
... In this work, two-dimensional Bi₂O₂CO₃ disk is synthesized, followed by the growth of Bi₂S₃ over Bi₂O₂CO₃ via topotactic transformation by controlling the amount of thiourea under hydrothermal conditions. The synthesized composite catalyst is investigated for photocatalytic oxidation and reduction of tetracycline hydrochloride and hexavalent chromium under visible light irradiation. High interfaci ...
DOI:
10.1016/j.jhazmat.2021.126263

33. 1H and 15N NMR Characterization of the Amine Groups of Heparan Sulfate Related Glucosamine Monosaccharides in Aqueous Solution

Author:
Beecher Consuelo N.; Larive Cynthia K.
Source:
Analytical chemistry 2015 v.87 no.13 pp. 6842-6848
ISSN:
1520-6882
Subject:
aqueous solutions; glucosamine; heparan sulfate; heparin; monosaccharides; nitrogen; nuclear magnetic resonance spectroscopy; protons; solvents; stable isotopes; sulfates
Abstract:
... Glucosamine is an important constituent of the heterogeneous glycosaminoglycans heparin and heparan sulfate occurring in N-acetylated and N-sulfated forms, and as the unmodified amine. Though the ¹H and ¹⁵N NMR chemical shifts of N-acetyl- and N-sulfoglucosamine residues have been extensively characterized, this study provides the first direct NMR characterization of the amine groups of glucosamin ...
DOI:
10.1021/acs.analchem.5b01181

34. 1H and 2H NMR Spin–Lattice Relaxation Probing Water: PEG Molecular Dynamics in Solution

Author:
Clop Eduardo M.; Perillo María A.; Chattah Ana K.
Source:
Journal of physical chemistry 2012 v.116 no.39 pp. 11953-11958
ISSN:
1520-5207
Subject:
aqueous solutions; chemical elements; hydrogen bonding; light scattering; magnetic fields; molecular dynamics; molecular weight; nuclear magnetic resonance spectroscopy; polyethylene glycol; solutes; solvents; spectral analysis
Abstract:
... Nuclear magnetic resonance spin–lattice relaxation times (T₁) measurements were performed in aqueous solutions of poly(ethylene glycol) (PEG) of 6000 Da molecular mass to study the dynamical relation between PEG and water molecules at different solute concentrations. ¹H–T₁ experiments were carried on at a low magnetic field in the time domain (20 MHz) and at a high field (400 MHz) to obtain spectr ...
DOI:
10.1021/jp304569a

35. 2,4,6-Trichlorophenol (TCP) removal from aqueous solution using Canna indica L.: kinetic, isotherm and Thermodynamic studies

Author:
Christian Ebere Enyoh; Beniah Obinna Isiuku
Source:
Chemistry in ecology 2021 v.37 no.1 pp. 64-82
ISSN:
1029-0370
Subject:
2,4,6-trichlorophenol; Canna indica; Gibbs free energy; adsorption; aquatic plants; aqueous solutions; biosorption; ecology; hydroponics; models; pH; reaction kinetics; sorption isotherms; wastewater treatment
Abstract:
... The study evaluated the effectiveness of an aquatic plant, Canna indica to remove 2,4,6-Trichlorophenol (TCP) from aqueous solution in a hydroponic set-up. The effects of TCP initial concentration (50–250 mg/L) and solution pH (4–9) on TCP biosorption were investigated. The removal efficiency increased with days and initial concentrations. The optimum removal was obtained at pH 4.0. The equilibriu ...
DOI:
10.1080/02757540.2020.1821673

36. 2,4-Dichlorophenol removal from water using an electrochemical method improved by a composite molecularly imprinted membrane/bipolar membrane

Author:
Yaoxing Liu; Zhang Yan; Riyao Chen; Yaping Yu; Xiao Chen; Xi Zheng; Xuehong Huang
Source:
Journal of hazardous materials 2019 v.377 pp. 259-266
ISSN:
0304-3894
Subject:
2,4-dichlorophenol; adsorption; aqueous solutions; chemical oxygen demand; dechlorination; electrochemistry; electrodes; electrolytes; gas chromatography-mass spectrometry; molecular imprinting; oxidation; titanium; total organic carbon
Abstract:
... Low efficiency is often a problem in electrochemical reductive hydrodechlorination (ERHD) to remove chlorinated compounds such as 2,4-dichlorophenol (24DCP) from water. In this study, a composite molecularly imprinted membrane (MIM)/bipolar membrane (BPM) was introduced onto a palladium-coated titanium mesh electrode (BPM/MIM@Pd/Ti) to increase the concentration of 24DCP on the surface of electrod ...
DOI:
10.1016/j.jhazmat.2019.05.064

37. 2,4-Dinitrophenylhydrazine functionalized sodium dodecyl sulfate-coated magnetite nanoparticles for effective removal of Cd(II) and Ni(II) ions from water samples

Author:
Soheil Sobhanardakani; Raziyeh Zandipak
Source:
Environmental monitoring and assessment 2015 v.187 no.7 pp. 412
ISSN:
0167-6369
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; adsorbents; adsorption; aqueous solutions; cadmium; cations; magnetite; models; nanoparticles; nickel; pH; river water; sampling; scanning electron microscopy; sodium; sodium dodecyl sulfate; tap water; temperature; testing; wastewater
Abstract:
... 2,4-Dinitrophenylhydrazine immobilized on sodium dodecyl sulfate (SDS)-coated magnetite and was used for removal of Cd(II) and Ni(II) ions from aqueous solution. The prepared product was characterized by X-ray diffraction (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The size of the nanoparticles according to SEM was obtained around 20–35  ...
DOI:
10.1007/s10661-015-4635-y

38. 2,6‐Diaminopyridine and Acrylamide‐Based Copolymers with Upper Critical Solution Temperature‐type Behavior in Aqueous Solution

Author:
Asad Asadujjaman; Vahid Ahmadi; Antoine Michel Claude Franc; Annabelle Bertin
Source:
Journal of polymer science 2019 v.57 no.19 pp. 2064-2073
ISSN:
0887-624X
Subject:
acrylamides; aqueous solutions; composite polymers; deuterium; deuterium oxide; drugs; electrolytes; isotopes; light scattering; microfluidic technology; phase transition; polymerization; solvents; temperature; turbidimetry; water solubility
Abstract:
... A novel copolymer based on supramolecular motif 2,6‐diaminopyridine and water‐soluble acrylamide, poly[N‐(6‐acetamidopyridin‐2‐yl) acrylamide‐co‐acrylamide], was synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization with various monomer compositions. The thermoresponsive behavior of the copolymers was studied by turbidimetry and dynamic light scattering (DLS). The ...
DOI:
10.1002/pola.29474

39. 2-(1,2,3-Triazol-4-yl)pyridine-containing ethynylarenes as selective ‘turn-on’ fluorescent chemosensors for Ni(II)

Author:
Joseph A. Christensen; James T. Fletcher
Source:
Tetrahedron letters 2014 v.55 no.33 pp. 4612-4615
ISSN:
0040-4039
Subject:
aqueous solutions; chemical reactions; chemical structure; fluorescence; metal ions; nickel; pyridines
Abstract:
... A series of ethynylarene compounds containing 2-(1,2,3-triazol-4-yl)pyridine chelating units were studied as fluorescent chemosensors for metal cations in aqueous solution. Analogs possessing two chelating units bridged by either 1,4-diethynylphenyl or 2,7-diethynylnaphthyl subunits displayed large hypsochromic shifts coupled with signal intensification when exposed to increasing concentrations of ...
DOI:
10.1016/j.tetlet.2014.06.059
PubMed:
25089063
PubMed Central:
PMC4117353

40. 2-(Methylamino)ethanol for CO2 Absorption in a Bubble Reactor

Author:
Folgueira I.; Teijido I.; García-Abuín A.; Gómez-Díaz D.; Rumbo A.
Source:
Energy & Fuels 2014 v.28 no.7 pp. 4737-4745
ISSN:
1520-5029
Subject:
absorption; aqueous solutions; bicarbonates; bioreactors; carbon dioxide; gases; hydrodynamics; hydrolysis; mass transfer; nuclear magnetic resonance spectroscopy
Abstract:
... This paper deals with the study of carbon dioxide capture using 2-(methylamino)ethanol (MAE) aqueous solutions. The reaction was studied in a bubble column reactor (BCR), and the most important aspects of the process, such as the hydrodynamic behavior (bubble size distribution, gas holdup, and interfacial area) and absorption phenomena (load of carbon dioxide and mass-transfer coefficient on the l ...
DOI:
10.1021/ef500923b

41. 2-Amino-3-hydroxy-4-methylthiazoliumchlorid. Ein neues Reagens zur Bestimmunung von Nitrit. : 2-Amino-3-hydroxy-4-methylthiazolium Chloride. A New Reagent for the Detection of Nitrite

Author:
G. Entenmann; H. Herter; H. Lay
Source:
Zeitschrift für Naturforschung B 2014 v.31 no.7 pp. 981-982
ISSN:
1865-7117
Subject:
aqueous solutions; aromatic compounds; azo dyes; chlorides; color; ions; nitrites
Abstract:
... After diazotation 2-amino-3-hydroxythiazolium chlorides react with activated aromatic compounds to build azo dyes. In absence of coupling components 2-amino-3-hydroxy-4-methylthiazolium chloride gives a colour reaction with nitrite ions, which is suitable for photometric detection of nitrite in aqueous solution. ...
DOI:
10.1515/znb-1976-0716

42. 2-Aminothiazole Functionalized Polystyrene for Selective Removal of Au(III) in Aqueous Solutions

Author:
Xiong Chunhua; Zhou Suguo; Liu Xiaozheng; Jia Qian; Ma Chunan; Zheng Xuming
Source:
Industrial & Engineering Chemistry Research 2014 v.53 no.6 pp. 2441-2448
ISSN:
1520-5045
Subject:
X-ray photoelectron spectroscopy; adsorption; aqueous solutions; cadmium; chelation; chlorides; cobalt; copper; desorption; engineering; gold; infrared spectroscopy; ions; models; nickel; nitrogen; polystyrenes; sorption isotherms; sulfur; thiourea
Abstract:
... A new chelating resin, polystyrene-2-aminothiazole (PS-AT), was synthesized via one-step reaction by grafting 2-aminothiazole in a chloromethylated polystyrene polymer. Its structure was characterized by elemental analysis and infrared spectroscopy. Batch experiments were applied to investigate the adsorption properties of PS-AT for Au(III) ions. The resin exhibits an excellent selectivity for Au( ...
DOI:
10.1021/ie403502r

43. 2-D soft ferromagnet based on [Wⱽ(CN)₈]³⁻ and Cuᴵᴵ with a Tc of 34 K

Author:
Robert Podgajny; Tomasz Korzeniak; Maria Balanda; Tadeusz Wasiutynski; William Errington; Terence J. Kemp; Nathaniel W. Alcock; Barbara Sieklucka
Source:
Chemical communications 2002 v. no.10 pp. 1138-1139
ISSN:
1364-548X
Subject:
aqueous solutions; chemical reactions; copper; ferromagnetism; geometry; ions; polymers; temperature
Abstract:
... Self-assembly of [Cu(tetren)]²⁺ (tetren = tetraethylenepentamine) and [W(CN)₈]³⁻ in acidic aqueous solution yields the double-layered square grid cyanide-bridged polymer of {(tetrenH₅)₀.₈Cuᴵᴵ₄[Wⱽ(CN)₈]₄·7.2H₂O}ₙ with Cu(ii) centres of square pyramidal geometry coordinatively saturated solely by CN bridges supplied by five [W(CN)₈]³⁻ ions; it exhibits soft ferromagnetic behaviour with an ordering t ...
DOI:
10.1039/b202810g

44. 2-Hydroxypropyl-β-cyclodextrin Polymer as a Mimetic Enzyme for Mediated Synthesis of Benzaldehyde in Water

Author:
Yang Zujin; Ji Hongbing
Source:
ACS sustainable chemistry 2013 v.1 no.9 pp. 1172-1179
ISSN:
2168-0485
Subject:
aqueous solutions; benzaldehyde; biomimetics; catalysts; catalytic activity; cellulose; epichlorohydrins; oxidation; polymers; synergism
Abstract:
... 2-Hydroxypropyl-β-cyclodextrin was immobilized onto cellulose with epichlorohydrin as a cross-linker. The obtained polymer, as biomimetic catalyst, was used to mediate synthesis of benzaldehyde in aqueous solution. The functionalized mimetic enzyme played a crucial role on catalytic oxidation of cinnamaldehyde with remarkable substrate conversion and product selectivity. Synergistic effect based o ...
DOI:
10.1021/sc4001059

45. 2-O-D-glucopyranosyl-L-ascorbic acid: Properties, production, and potential application as a substitute for L-ascorbic acid

Author:
Wenbin Zhang; Qicheng Huang; Ruijin Yang; Wei Zhao; Xiao Hua
Source:
Journal of functional foods 2021 v.82 pp. 104481
ISSN:
1756-4646
Subject:
anthocyanins; antioxidants; aqueous solutions; ascorbic acid; biotransformation; financial economics; food industry; health services; humans; thermal stability; value added
Abstract:
... L-ascorbic acid (L-AA), also named as Vitamin C, is necessary for human beings due to its antioxidant and other wholesome functions. However, ascorbic acid would degrade natural pigments like anthocyanins in food systems, especially in beverages, and the stability of L-AA itself is low in aqueous solution. 2-O-D-glucopyranosyl-L-ascorbic acid (AA-2G), a kind of ascorbic acid derivative, has outsta ...
DOI:
10.1016/j.jff.2021.104481

46. 2-Phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-Oxide (PTIO•) Radical Scavenging: A New and Simple Antioxidant Assay In Vitro

Author:
Xican Li
Source:
Journal of agricultural and food chemistry 2017 v.65 no.30 pp. 6288-6297
ISSN:
0021-8561
Subject:
antioxidants; aqueous solutions; ascorbic acid; buffers; freeze drying; ionization; pH; phosphates; protons; stereospecificity; structure-activity relationships; tandem mass spectrometry; ultra-performance liquid chromatography
Abstract:
... Current in vitro antioxidant assays have several limitations, which frequently cause inconsistent results. The study develops a new antioxidant assay using the 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide radical (PTIO•). After the investigation of various factors, the experimental protocol was briefly recommended as follows: PTIO• and the sample solution were added to phosphate buffer ( ...
DOI:
10.1021/acs.jafc.7b02247

47. 226Ra, 238U and Cd adsorption kinetics and binding capacity of two cyanobacterial strains isolated from highly radioactive springs and optimal conditions for maximal removal effects in contaminated water

Author:
Fatemeh Heidari; Hossein Riahi; Mahmoud Reza Aghamiri; Farideh Zakeri; Zeinab Shariatmadari; Tomáš Hauer
Source:
International journal of phytoremediation 2018 v.20 no.4 pp. 369-377
ISSN:
1549-7879
Subject:
Chroococcidiopsis thermalis; Fourier transform infrared spectroscopy; Nostoc punctiforme; adsorbents; adsorption; aqueous solutions; binding capacity; binding sites; biomass; biosorption; cadmium; decontamination; heavy metals; hot springs; industrial effluents; models; pH; phytoremediation; radioactivity; radionuclides; radium; sorption isotherms; uranium; water pollution; water treatment
Abstract:
... Biomass-based decontamination methods are among the most interesting water treatment techniques. In this study, 2 cyanobacterial strains, Nostoc punctiforme A.S/S4 and Chroococcidiopsis thermalis S.M/S9, isolated from hot springs containing high concentrations of radium (²²⁶Ra), were studied to be associated with removal of radionuclides (²³⁸U and ²²⁶Ra) and heavy metal cadmium (Cd) from aqueous s ...
DOI:
10.1080/15226514.2017.1393392

48. 26. Freezing under pressure: A novel method for cryopreservation

Author:
Nickolas Greer
Source:
Cryobiology 2015 v.71 no.1 pp. 171-172
ISSN:
0011-2240
Subject:
ambient pressure; aqueous solutions; cryopreservation; cryoprotectants; dimethyl sulfoxide; erythrocytes; freezing; freezing point; glycerol; hemolysis; high pressure treatment; humans; hydrostatic pressure; ice; medicine; permeability; thawing; tissues; toxicity; viscosity; vitrification
Abstract:
... The ability to preserve cells, tissues, and organs with minimal damage for an extended period of time is essential for advancements in medicine and research. Current methods for cryopreservation are based on using high concentrations (up to 60% v/v) of cryoprotectants which are toxic to living cells. Moreover, complex tissues and organs have limited permeability to cryoprotectants and require a pr ...
DOI:
10.1016/j.cryobiol.2015.05.032

49. 2D porous molybdenum nitride/cobalt nitride heterojunction nanosheets with interfacial electron redistribution for effective electrocatalytic overall water splitting

Author:
Hao Guo; Aiping Wu; Ying Xie; Haijing Yan; Dongxu Wang; Lei Wang; Chungui Tian
Source:
Journal of materials chemistry A 2021 v.9 no.13 pp. 8620-8629
ISSN:
2050-7496
Subject:
aqueous solutions; catalytic activity; cobalt; dissociation; molybdenum; nanosheets; nitrides; solar collectors
Abstract:
... Binary transition metal-based nitrides are promising for overall water splitting. Morphology and heterojunction engineering is important to realize effective catalysis, but their simultaneous engineering remains a challenge. Herein, we have shown the designed synthesis of porous 2D molybdenum nitride/cobalt nitride heterojunction nanosheets (2D porous Mo₂N–CoₓN) based on controllable nitridation o ...
DOI:
10.1039/d0ta11997k

50. 2D ultrathin nanosheets of Co–Al layered double hydroxides prepared in l-asparagine solution: enhanced peroxidase-like activity and colorimetric detection of glucose

Author:
Lijian Chen; Bing Sun; Xindong Wang; Fengmin Qiao; Shiyun Ai
Source:
Journal of materials chemistry B 2013 v.1 no.17 pp. 2268-2274
ISSN:
2050-7518
Subject:
aluminum; aqueous solutions; asparagine; cobalt; colloids; color; colorimetry; enzyme substrates; fruit juices; glucose; hydrogen peroxide; hydroxides; moieties; nanosheets; oxidation; peroxidase; solvents; temperature; water solubility
Abstract:
... In this report, a novel approach for exfoliation of Co–Al layered double hydroxides (LDHs) in aqueous solution of l-asparagine was proposed. l-Asparagine is a water-soluble amino acid whose carbonyl groups would have a strong interaction with the LDH host layers and the amino groups might weaken the interlayer interactions. This simple method did not need reflux at high temperature, overcame the d ...
DOI:
10.1039/c3tb00044c

51. 2D-Metal–Organic-Framework-Nanozyme Sensor Arrays for Probing Phosphates and Their Enzymatic Hydrolysis

Author:
Li Qin; Xiaoyu Wang; Yufeng Liu; Hui Wei
Source:
Analytical chemistry 2018 v.90 no.16 pp. 9983-9989
ISSN:
1520-6882
Subject:
adenosine diphosphate; adenosine monophosphate; adenosine triphosphate; apyrase; aqueous solutions; enzymatic hydrolysis; phosphates
Abstract:
... The detection of phosphates and their enzymatic hydrolysis is of great importance because of their essential roles in various biological processes and numerous diseases. Compared with individual sensors for detecting one given phosphate at a time, sensor arrays are able to discriminate multiple phosphates simultaneously. Although nanomaterial-based sensor arrays have shown great promise for the di ...
DOI:
10.1021/acs.analchem.8b02428

52. 2′-Oxoethyl Flavin Revisited

Author:
Jiří Svoboda; Burkhard König; Keyarash Sadeghian; Martin Schützb
Source:
Zeitschrift für Naturforschung 2014 v.63 no.1 pp. 47-54
ISSN:
0932-0776
Subject:
Lewis bases; aldehydes; amination; aqueous solutions; hydrogen bonding; mathematical theory; moieties; nuclear magnetic resonance spectroscopy; riboflavin; solubility; solvents
Abstract:
... The present work investigates the possibility of using 2'-oxoethyl flavin (2) as a starting material for the construction of more complicated flavin-based molecules. 2'-Oxoethyl flavin (2), prepared by oxidative degradation of commercially available riboflavin 1, is however a rather untypical aldehyde. It prefers the hydrated gem-diol form 4 in aqueous solution. Ab initio electronic structure calc ...
DOI:
10.1515/znb-2008-0107

53. 3-Aminophenyl boronic acid-functionalized CuInS2 quantum dots as a near-infrared fluorescence probe for the determination of dopamine

Author:
Siyu Liu; Fanping Shi; Xiaojun Zhao; Lu Chen; Xingguang Su
Source:
Biosensors & bioelectronics 2013 v.47 pp. 379-384
ISSN:
0956-5663
Subject:
aqueous solutions; biosensors; blood serum; catechol; dopamine; esters; fluorescence; humans; hydroquinone; phenol; pyrogallol; quantum dots; resorcinol
Abstract:
... Water-soluble CuInS2 ternary quantum dots (QDs) capped by mercaptopropionic acid were directly synthesized in aqueous solution. Consequently, the CuInS2 QDs were covalently linked to 3-aminophenyl boronic acid molecules to form the 3-aminophenyl boronic acid-functionalized CuInS2 QDs (F-CuInS2 QDs). The F-CuInS2 QDs had a fairly symmetric fluorescence emission centered at 736nm that was in the nea ...
DOI:
10.1016/j.bios.2013.03.055

54. 3-Aminopropyltriethoxysilane-functionalized manganese doped ZnS quantum dots for room-temperature phosphorescence sensing ultratrace 2,4,6-trinitrotoluene in aqueous solution

Author:
Ya-qin Wang; Wen-sheng Zou
Source:
Talanta 2011 v.85 no.1 pp. 469-475
ISSN:
0039-9140
Subject:
aqueous solutions; coatings; colloids; color; detection limit; fluorescence; light scattering; manganese; nanocrystals; nanoparticles; oxidation; phosphorescence; quantum dots; silica; sulfides; trinitrotoluene; zinc
Abstract:
... New strategies for silica coating of inorganic nanoparticles became a research hotspot for enhancing the mechanical stability of colloidal particles and protecting colloidal particles against oxidation and agglomeration, and so on. In this paper, 3-aminopropyltriethoxysilane (APTES)-functionalized Mn doped (AF MnD) ZnS QDs was prepared to be firsyly through the use of silane coupling agents to for ...
DOI:
10.1016/j.talanta.2011.04.014

55. 3-D self-assembly of flower-like particles via microwave irradiation for water treatment

Author:
Youngsoo Jung; You-Hwan Son; Jung-Kun Lee
Source:
RSC advances 2012 v.2 no.13 pp. 5877-5884
ISSN:
2046-2069
Subject:
aqueous solutions; ethylene glycol; ferric chloride; ferric oxide; hydrogen sulfide; ions; iron; microwave radiation; microwave treatment; nanoparticles; raw materials; sulfur; surface area; temperature; thermodynamics; toxic substances; toxicity; urea; water treatment
Abstract:
... Three-dimensional (3-D) flower-like shape (FLS) Fe₃O₄ and Fe particles were successfully synthesized using FLS precursor particles that are prepared through a facile microwave-assisted reaction. The mechanism underlying the self-assembly process and shape evolution of FLS particles was systematically investigated by changing reaction parameters such as reaction temperature, reaction time and react ...
DOI:
10.1039/c2ra20500a

56. 3-Miktoarm Star Terpolymers via Janus Polymerization: One-Step Synthesis and Self-Assembly

Author:
Yao Li; Moritz von der Lühe; Felix H. Schacher; Jun Ling
Source:
Macromolecules 2018 v.51 no.13 pp. 4938-4944
ISSN:
1520-5835
Subject:
aqueous solutions; biodegradability; catalysts; crystallization; drugs; epoxides; gene transfer; hydrophilicity; hydrophobicity; lutetium; nanorods; permeability; polyethylene glycol; polymerization
Abstract:
... Janus polymerization combines cationic and anionic polymerizations into the two ends of a single growing chain and presents a novel pathway to produce topologically defined polymers. In this contribution, we report a one-step synthesis of 3-miktoarm star terpolymers of poly(ethylene glycol)-star-poly(ε-caprolactone)-star-poly(ε-caprolactone-co-tetrahydrofuran) (PEG-star-PCL-star-P(CL-co-THF)) via ...
DOI:
10.1021/acs.macromol.8b00949

57. 3-Monochloropropane-1,2-diol Monoesters Food Contaminant Analysis in Palm Oil-Based Food Samples Using C18-Dispersive Solid-Phase Extraction Coupled with GC-FID

Author:
Nur Hasanah Mohd Jumali; Shangeetha Ganesan; Noorfatimah Yahaya; Mazidatulakmam Miskam
Source:
Food analytical methods 2021 v.14 no.10 pp. 2101-2110
ISSN:
1936-9751
Subject:
alpha-chlorohydrin; aqueous solutions; chemical species; detection limit; ethyl acetate; flame ionization; food contamination; solid phase extraction; solvents; sorbents; standard deviation
Abstract:
... 3-Monochloropropane-1,2-diol (3-MCPD) monoesters are a form of 3-MCPD esters known as potential food contaminant that may occur in a variety of food samples. A dispersive solid-phase extraction (dSPE) was developed to provide clean-up and pre-concentration in the determination of 1-palmitoyl-3-MCPD and 1-oleoyl-3-MCPD prior to gas chromatography-flame ionization detector analysis (GC-FID). Dispers ...
DOI:
10.1007/s12161-021-02040-1

58. 3-Picolyl Azide Adenine Dinucleotide as a Probe of Femtosecond to Picosecond Enzyme Dynamics

Author:
Dutta Samrat; Li Yun-Liang; Rock William; Houtman Jon C. D.; Kohen Amnon; Cheatum Christopher M.
Source:
Journal of physical chemistry 2012 v.116 no.1 pp. 542-548
ISSN:
1520-5207
Subject:
absorption; active sites; adenine; aqueous solutions; formate dehydrogenase; hydrogen bonding; infrared spectroscopy
Abstract:
... Functionally relevant femtosecond to picosecond dynamics in enzyme active sites can be difficult to measure because of a lack of spectroscopic probes that can be located in the active site without altering the behavior of the enzyme. We have developed a new NAD⁺ analog 3-Picolyl Azide Adenine Dinucleotide (PAAD⁺), which has the potential to be a general spectroscopic probe for NAD-dependent enzyme ...
DOI:
10.1021/jp208677u
PubMed:
22126535
PubMed Central:
PMC3260785

59. 3-mercaptopropyltrimethoxysilane-Modified Multi-walled Carbon Nanotubes as a New Functional Adsorbent for Flow Injection Extraction of Pb(II) from Water and Sediment Samples

Author:
Bruna Fabrin Somera; Marcela Zanetti Corazza; Maria Josefa Santos Yabe; Mariana Gava Segatelli; Evgeny Galunin; César Ricardo Teixeira Tarley
Source:
Water, air, and soil pollution 2012 v.223 no.9 pp. 6069-6081
ISSN:
0049-6979
Subject:
Fourier transform infrared spectroscopy; adsorption; aqueous solutions; atomic absorption spectrometry; buffers; carbon nanotubes; detection limit; energy; pH; scanning electron microscopy; sediments; solid phase extraction
Abstract:
... In the present study, a novel synthesized adsorbent material based on 3-mercaptopropyltrimethoxysilane-functionalized multi-walled carbon nanotubes was used to increase the Pb²⁺ adsorption from aqueous solutions in a flow injection solid-phase extraction system coupled to flame atomic absorption spectrometry. Spectroscopic and microscopic techniques (Fourier transform infrared spectroscopy, energy ...
DOI:
10.1007/s11270-012-1341-z

60. 31P NMR Phospholipid Profiling of Soybean Emulsion Recovered from Aqueous Extraction

Author:
Yao, Linxing; Jung, Stephanie
Source:
Journal of agricultural and food chemistry 2010 v.58 no.8 pp. 4866–4872
ISSN:
0021-8561
Subject:
phospholipids; soybean products; emulsions; food analysis; food composition; model food systems; aqueous solutions; vegetable extracts; lipid content; nuclear magnetic resonance spectroscopy; phosphorus; enzymatic treatment
Abstract:
... The quantity and composition of phospholipids in full-fat soybean flour, flakes, and extruded flakes and in the cream fraction recovered after aqueous extraction (AEP) and enzyme-assisted aqueous extraction (EAEP) of these substrates were studied with 31P NMR. Extruded flakes had significantly more phosphatidic acid (PA) than flakes and flour prior to aqueous extraction. The PA content of the crea ...
DOI:
10.1021/jf9041358
PubMed:
20329795

61. 3D Channel-structured graphene as efficient electrodes for capacitive deionization

Author:
Liang Chang; Yun Hang Hu
Source:
Journal of colloid and interface science 2019 v.538 pp. 420-425
ISSN:
0021-9797
Subject:
adsorption; aqueous solutions; carbon monoxide; deionization; electrodes; graphene; heat production; liquids; moieties; oxygen; potassium; recycling; sodium chloride; surface area
Abstract:
... Capacitive deionization (CDI), which is one of up-and-coming water treatment technologies, is based on ion electrostatic adsorption on electrode surface. Herein, three-dimensional channel-structured graphene (CSG), which was synthesized via exothermic reaction between liquid potassium and carbon monoxide gas, was demonstrated as an efficient electrode material for CDI. Namely, the CSG electrode ex ...
DOI:
10.1016/j.jcis.2018.11.105

62. 3D Coral-Like Ni₃S₂ on Ni Foam as a Bifunctional Electrocatalyst for Overall Water Splitting

Author:
Jianfang Zhang; Yang Li; Tianyu Zhu; Yan Wang; Jiewu Cui; Jingjie Wu; Hui Xu; Xia Shu; Yongqiang Qin; Hongmei Zheng; Pulickel M. Ajayan; Yong Zhang; Yucheng Wu
Source:
ACS applied materials & interfaces 2018 v.10 no.37 pp. 31330-31339
ISSN:
1944-8252
Subject:
aqueous solutions; ions; hydrogen production; electrodes; durability; electrochemistry; thiourea; foams; nickel; oxidation; oxygen production
Abstract:
... High-performance noble metal-free electrocatalysts are extremely desired for overall water splitting, but there are huge challenges. Herein, we report a novel one-step electrochemical anodic oxidation and cathodic deposition strategy to in situ fabricate three-dimensional coral-like Ni₃S₂ on Ni foam (NF) for electrocatalytic overall water splitting. In a typical two-electrode cell, NF acts as both ...
DOI:
10.1021/acsami.8b09361

63. 3D Culture of Adipose-Tissue-Derived Stem Cells Mainly Leads to Chondrogenesis in Poly(ethylene glycol)-Poly(l-alanine) Diblock Copolymer Thermogel

Author:
Yeon Bora; Park Min Hee; Moon Hyo Jung; Kim Seung-Jin; Cheon Young Woo; Jeong Byeongmoon
Source:
Biomacromolecules 2013 v.14 no.9 pp. 3256-3266
ISSN:
1526-4602
Subject:
alanine; aqueous solutions; biomarkers; chondrogenesis; collagen; composite polymers; hydrogels; in vitro studies; in vivo studies; molecular weight; muscle development; polyethylene glycol; polypeptides; stem cells; temperature; tissue engineering; tubulin
Abstract:
... Poly(ethylene glycol)-b-poly(l-alanine) (PEG-L-PA)s with L-PA molecular weights of 620, 1100, and 2480 Da and a fixed molecular weight of PEG at 5000 Da were synthesized to compare the thermosensitive behavior, and to investigate their potential as a three-dimensional (3D) culture matrix of adipose-tissue-derived stem cells (ADSCs). The sol-to-gel transition temperature and the concentration range ...
DOI:
10.1021/bm400868j

64. 3D MoS2 Composition Aerogels as Chemosensors and Adsorbents for Colorimetric Detection and High-Capacity Adsorption of Hg2+

Author:
Zhi Lihua; Zuo Wei; Chen Fengjuan; Wang Baodui
Source:
ACS sustainable chemistry 2016 v.4 no.6 pp. 3398-3408
ISSN:
2168-0485
Subject:
adsorbents; adsorption; aqueous solutions; colorimetry; desorption; feedstocks; gold; graphene oxide; iron oxides; magnetic separation; mercury; nanogold; nanoparticles; nanosheets; porous media; profits and margins; public health; remediation; water pollution
Abstract:
... Precise detection and effectively eliminating mercury pollution in aqueous solutions remains an onerous task for protecting the public health and environment. In this paper, porous MoS₂ composite aerogel-supported Au nanoparticles with strong mercury affinity have been fabricated to deal with this problem. Such composite aerogels are fabricated using graphene oxide (GO)-doped MoS₂ sheets as the fe ...
DOI:
10.1021/acssuschemeng.6b00409

65. 3D Silver Nanoparticles Decorated Zinc Oxide/Silicon Heterostructured Nanomace Arrays as High-Performance Surface-Enhanced Raman Scattering Substrates

Author:
Huang Jian; Chen Feng; Zhang Qing; Zhan Yonghua; Ma Dayan; Xu Kewei; Zhao Yongxi
Source:
ACS applied materials 2015 v.7 no.10 pp. 5725-5735
ISSN:
1944-8252
Subject:
Raman spectroscopy; aqueous solutions; detection limit; food inspection; melamine; milk; nanorods; nanosilver; silicon; zinc oxide
Abstract:
... Three-dimensional (3D) hierarchical nanostructures have been considered as one of the most promising surface-enhanced Raman spectroscopy (SERS) substrates because of the ordered arrangement of high-density hotspots along the third dimension direction. Herein, we reported a unique 3D nanostructure for SERS detection based on silver nanoparticles (AgNPs) decorated zinc oxide/silicon (ZnO/Si) heteros ...
DOI:
10.1021/am507857x

66. 3D Structure of Lamellar Domains in a Surfactant Solution below the Krafft Temperature

Author:
Kawabata Youhei; Yashima Hirohito; Kato Tadashi
Source:
Journal of physical chemistry 2012 v.116 no.5 pp. 1593-1597
ISSN:
1520-5207
Subject:
aqueous solutions; confocal microscopy; nonionic surfactants; physical chemistry; temperature
Abstract:
... We have studied the 3D structure of lamellar domains in aqueous solutions of nonionic surfactant C₁₆E₆ and C₁₆E₇ below the Krafft temperature by means of confocal microscopy. A new morphology of lamellar domains has been found in the C₁₆E₆ system, which is the network of lamellar domains. In the C₁₆E₇ system, we have confirmed that the spherical vesicles have a hollow including excess water. Furth ...
DOI:
10.1021/jp210406p

67. 3D ZnO modified biochar-based hydrogels for removing U(VI) in aqueous solution

Author:
Yu Guo; Xiaoyang Liu; Shuibo Xie; Haiyan Liu; Chenxu Wang; Lingzhi Wang
Source:
Colloids and surfaces 2022 v.642 pp. 128606
ISSN:
0927-7757
Subject:
adsorption; aqueous solutions; biochar; chelation; hydrogels; ion exchange; pH; sorption isotherms; thermal stability; uranium
Abstract:
... A novel three dimensional ZnO modified biochar-based hydrogel (ZBCG) was fabricated and employed for removing U(VI) in aqueous solution. The ZBCG hydrogel, the successful loading of ZnO modified biochar (ZBC) confirmed by SEM and FTIR, has showed a well mechanical characteristics, thermal stability, anti-swelling property and adsorption performance for U(VI) than pure hydrogels (BG). At T = 40 ℃, ...
DOI:
10.1016/j.colsurfa.2022.128606

68. 3D flower-like ZnFe-ZIF derived hierarchical Fe, N-Codoped carbon architecture for enhanced oxygen reduction in both alkaline and acidic media, and zinc-air battery performance

Author:
Zhiwei Zhang; Huihui Jin; Jiawei Zhu; Wenqiang Li; Chengtian Zhang; Jiahuan Zhao; Feng Luo; Zhigang Sun; Shichun Mu
Source:
Carbon 2020 v.161 pp. 502-509
ISSN:
0008-6223
Subject:
active sites; aqueous solutions; batteries; carbon; carbon nanotubes; catalysts; coordination polymers; electrochemistry; energy density; fuel cells; imidazole; iron; methanol; moieties; oxygen; platinum; pyrolysis
Abstract:
... Developing highly efficient and durable noble-metal-free electrocatalysts towards oxygen reduction reaction (ORR) is desperately urgent for realizing widespread application of fuel cells and metal-air batteries. Recently, great importance has been attached to metal-organic framework (MOF)-derived carbon-based materials due to the low cost and excellent performance. Herein, a novel zeolitic imidazo ...
DOI:
10.1016/j.carbon.2020.01.108

69. 3D hierarchical SnO₂@Ni(OH)₂ core–shell nanowire arrays on carbon cloth for energy storage application

Author:
Qingqing Ke; Cao Guan; Minrui Zheng; Yating Hu; Kuan-hung Ho; John Wang
Source:
Journal of materials chemistry A 2015 v.3 no.18 pp. 9538-9542
ISSN:
2050-7496
Subject:
aqueous solutions; capacitance; carbon; electrodes; energy; nanocomposites; nanowires; nickel; potassium hydroxide; tin dioxide
Abstract:
... A judicious combination of conducting materials with selected transition metal hydroxides to form core–shell nanostructures has attracted great attention owing to the underlying synergistic effect for energy storage. In this work, we fabricate a novel 3D nanostructure consisting of Ni(OH)₂ ultrathin nanoflakes directly anchored on SnO₂ nanowire arrays by a facile solution-based method, which utili ...
DOI:
10.1039/c5ta01133g

70. 3D hierarchical flower-like nickel ferrite/manganese dioxide toward lead (II) removal from aqueous water

Author:
Bo Xiang; Dong Ling; Han Lou; Hongbo Gu
Source:
Journal of hazardous materials 2017 v.325 pp. 178-188
ISSN:
0304-3894
Subject:
absorbents; adsorbents; adsorption; aqueous solutions; ferrimagnetic materials; heavy metals; ions; lead; magnetism; manganese dioxide; models; nanocomposites; nickel; pH; sorption isotherms
Abstract:
... A functionalized magnetic nickel ferrite/manganese dioxide (NiFe2O4/MnO2) with 3D hierarchical flower-like and core–shell structure was synthesized by a facile hydrothermal approach and applied for the removal of Pb(II) ions from aqueous solutions. Batch adsorption experiments were conducted to study the effect of solution pH, initial Pb(II) concentration, and dose of absorbents on the Pb(II) remo ...
DOI:
10.1016/j.jhazmat.2016.11.011

71. 3D interconnected networks of a ternary hierarchical carbon nanofiber/MnO₂/Ni(OH)₂ architecture as integrated electrodes for all-solid-state supercapacitors

Author:
Dan Zhou; Hao Niu; Huiming Lin; Xue Yang; He Jiang; Ting Zhang; Qian Wang; Fengyu Qu
Source:
RSC advances 2016 v.6 no.76 pp. 71882-71892
ISSN:
2046-2069
Subject:
aqueous solutions; capacitance; carbon; electrodes; electronics; energy density; nanosheets; nickel; potassium hydroxide
Abstract:
... We demonstrate the design and fabrication of hierarchical Ni(OH)₂ nanosheets vertically grown on a porous carbon nanofiber/MnO₂ composite (CF/MnO₂) to form three dimensional interconnected networks via a facile hydrothermal process for supercapacitor applications. The obtained CF/MnO₂/Ni(OH)₂ electrode exhibits high specific capacitance (2079 F g⁻¹ at 0.5 A g⁻¹ in 6 M KOH aqueous solution), render ...
DOI:
10.1039/c6ra13902g

72. 3D interpenetrating networks of MnO2/Carbon-CNTs composites derived from ZIF-67 MOF and their application to supercapacitors

Author:
Xiang Zheng; Xiaowei Liu; Xiaopan Yang; Yangyang Wang; Xuehua Liu; Aiping Fu; Peizhi Guo; Hongliang Li
Source:
Colloids and surfaces 2021 v.623 pp. 126686
ISSN:
0927-7757
Subject:
aqueous solutions; capacitance; carbon; carbon nanotubes; cobalt; electrical conductivity; electrochemical capacitors; electrochemistry; electrodes; electrolytes; energy; nanocrystals; surface area
Abstract:
... 3D interpenetrating networks of carbon modified MnO₂ nanocrystals being connected by carbon nanotubes (MnO₂/Carbon-CNTs) have been prepared using cobalt modified Carbon-CNTs, which is derived from CNTs joined ZIF-67 MOF crystals, as sacrificial template. Due to the coexistence of amorphous carbon and carbon nanotubes (CNTs) and their diversity upon oxidization, the CNTs can be remained preferentia ...
DOI:
10.1016/j.colsurfa.2021.126686

73. 3D porous and 3D interpenetrating triple framework structures constructed by aurophilicity-coordination interplay in {Mn[Au(CN)₂]₂(H₂O)₂}ₙ and {KFe[Au(CN)₂]₃}ₙ

Author:
Wen Dong; Li-Na Zhu; Ya-Qiu Sun; Mao Liang; Zhan-Quan Liu; Dai-Zheng Liao; Zong-Hui Jiang; Shi-Ping Yan; Peng Cheng
Source:
Chemical communications 2003 v. no.20 pp. 2544-2545
ISSN:
1364-548X
Subject:
aqueous solutions; chemical reactions; coordination polymers; gold; luminescence; manganese; porous media
Abstract:
... Two cyano-bridged heterobimetallic coordination polymers {Mn[Au(CN)₂]₂(H₂O)₂}ₙ (1) and {KFe[Au(CN)₂]₃}ₙ (2), have been synthesized from [Au(CN)₂]⁻ building blocks and structurally characterized. In both complexes aurophilicity play an important role in determining the 3D open microporous framework and the interpenetrating triple framework for 1 and 2, respectively. Both aqueous solutions of 1 and ...
DOI:
10.1039/b306026h

74. 3D printed sandwich materials filled with hydrogels for extremely low heat release rate

Author:
Laura Geoffroy; Anne-lise Davesne; Séverine Bellayer; Florent Blanchard; Elodie Richard; Fabienne Samyn; Maude Jimenez; Serge Bourbigot
Source:
Polymer degradation and stability 2020 v.179 pp. 109269
ISSN:
0141-3910
Subject:
X-ray diffraction; agar; alginates; aluminum; aqueous solutions; calorimeters; confocal microscopy; degradation; flame retardants; heat transfer; hydrogels; liquids; porosity; potassium carbonate; three-dimensional printing; vermiculite
Abstract:
... Additive manufacturing is a powerful tool to design materials with original properties. An innovative design of poly (Ethylene Vinyl Acetate) (EVA) containing 30 wt.-% of Aluminum TriHydroxide (ATH) was reported in a previous paper and liquids (water or potassium carbonate aqueous solution) were incorporated in the 3D printed structure. These multi-materials showing interesting properties, but sta ...
DOI:
10.1016/j.polymdegradstab.2020.109269

75. 3D printing of a tough double-network hydrogel and its use as a scaffold to construct a tissue-like hydrogel composite

Author:
Cong Du; Jian Hu; Xinyu Wu; Huimin Shi; Hai Chao Yu; Jin Qian; Jun Yin; Changyou Gao; Zi Liang Wu; Qiang Zheng
Source:
Journal of materials chemistry B 2022 v.10 no.3 pp. 468-476
ISSN:
2050-7518
Subject:
acrylamides; aqueous solutions; biomimetics; cartilage; chlorides; chondrocytes; fibrin; hydrogels; modulus of elasticity; sulfates; three-dimensional printing; viability
Abstract:
... To mimic biological tissues with high toughness such as cartilage, it is highly desired to fabricate stable and tough hydrogels with intricate shapes to act as a structural support. Extrusion-based 3D printing is a promising method to fabricate 3D scaffolds with various architectures; however, printing tough hydrogel structures with high fidelity and resolution is still a challenge. In this work, ...
DOI:
10.1039/d1tb02465e

76. 3D printing of high-strength chitosan hydrogel scaffolds without any organic solvents

Author:
Luyu Zhou; Hamed Ramezani; Miao Sun; Mingjun Xie; Jing Nie; Shang Lv; Jie Cai; Jianzhong Fu; Yong He
Source:
Biomaterials science 2020 v.8 no.18 pp. 5020-5028
ISSN:
2047-4849
Subject:
aqueous solutions; biocompatibility; biocompatible materials; biodegradability; cell culture; chitosan; compression strength; gelation; hydrogels; rheological properties; temperature; toxicity
Abstract:
... 3D printing of chitosan hydrogels has attracted wide interest because of their excellent biocompatibility, antibacterial activities, biodegradability, zero toxicity and low cost. However, chitosan inks are often involved in toxic and organic solvents. Moreover, the recently reported 3D-printed chitosan scaffolds lack enough strength, thus limiting their use in tissue engineering. Here, we reported ...
DOI:
10.1039/d0bm00896f

77. 3D reticulated carbon nitride materials high-uniformly capture 0D black phosphorus as 3D/0D composites for stable and efficient photocatalytic hydrogen evolution

Author:
Ting Song; Gongchang Zeng; Piyong Zhang; Tingting Wang; Atif Ali; Shaobin Huang; Heping Zeng
Source:
Journal of materials chemistry A 2019 v.7 no.2 pp. 503-512
ISSN:
2050-7496
Subject:
active sites; aqueous solutions; carbon nitride; hydrogen production; manufacturing; phosphorus; photocatalysis; quantum dots; redox reactions; semiconductors
Abstract:
... Black phosphorus has recently emerged as an excellent 2D semiconductor with high charge-carrier mobility and wide tunable bandgap for photocatalysis. In this research, a simple method was developed to manufacture reticulated carbon nitride materials (CN-4N). Utilizing the self-capturing property of CN-4N to capture black phosphorus quantum dots (BQ) uniformly dispersed in aqueous solution, BQ were ...
DOI:
10.1039/c8ta09647c

78. 3D silk fibroin scaffold incorporating titanium dioxide (TiO2) nanoparticle (NPs) for tissue engineering

Author:
Jung-Ho Kim; Faheem A. Sheikh; Hyung Woo Ju; Hyun Jung Park; Bo Mi Moon; Ok Joo Lee; Chan Hum Park
Source:
International journal of biological macromolecules 2014 v.68 pp. 158-168
ISSN:
0141-8130
Subject:
X-ray diffraction; aqueous solutions; cytotoxicity; fibroblasts; fibroins; mechanical properties; nanoparticles; osteoblasts; porosity; silk; tissue engineering; titanium dioxide
Abstract:
... The present study deals with fabrication of scaffolds composing of silk fibroin and TiO2 NPs fabricated using a salt-leaching process. At first instance, the TiO2 NPs were prepared by using sol–gel synthesis, affording to have average diameter of 77±21μm. Furthermore, the aqueous solutions of silk fibroin were mixed with 0.2%, 2.0% and 4.0% of TiO2 NPs and salt-leaching process was introduced whic ...
DOI:
10.1016/j.ijbiomac.2014.04.045

79. 4(5)-Methylbenzotriazole: a review of the life-cycle of an emerging contaminant

Author:
Nicholas M. Dummer
Source:
Re/views in environmental science and bio/technology 2014 v.13 no.1 pp. 53-61
ISSN:
1569-1705
Subject:
aqueous solutions; biodegradability; corrosion; isomers; long term effects; metals; pollutants; water supply; water treatment
Abstract:
... 4(5)-Methylbenzotriazole (MeBT), also known as tolyltriazole is a widely used compound that effectively prevents the corrosion of many metals in acidic and saline aqueous solutions. This review summarizes the current body of knowledge related to MeBT including its uses, corrosion inhibition capabilities, chemical and toxicological properties, occurrence in the environment, and treatment and remova ...
DOI:
10.1007/s11157-013-9318-y

80. 4,4′,5,5′-Tetraamino-3,3′-azo-bis-1,2,4-triazole and the electrosynthesis of high-performing insensitive energetic materials

Author:
Joseph R. Yount; Matthias Zeller; Edward F. C. Byrd; Davin G. Piercey
Source:
Journal of materials chemistry A 2020 v.8 no.37 pp. 19337-19347
ISSN:
2050-7496
Subject:
aqueous solutions; electrochemistry; electrosynthesis; friction; oxidation; thermal stability; toxicity
Abstract:
... Herein, we have demonstrated that electrochemical synthesis of high-performing, insensitive energetic materials in an environmentally friendly manner is possible in a single step from readily available precursors using a synthetic transformation not possible by traditional chemical methods. The electrochemical oxidation of 3,4,5-triamino-1,2,4-triazole in aqueous solution yielded a remarkably stab ...
DOI:
10.1039/d0ta05360k

81. 4,4′-Fluoresceinoxy bisphthalonitrile (FPN)-incorporated polycaprolactone electrospun membranes: a portable sensor strip for detection of Fe3+ ions

Author:
K. K. Rijin; P. Sagitha; G. S. Amitha; Suni Vasudevan; A. Sujith
Source:
Journal of materials science 2019 v.54 no.20 pp. 13433-13444
ISSN:
0022-2461
Subject:
aqueous solutions; contact angle; detection limit; fluorescence emission spectroscopy; infrared spectroscopy; ions; iron; lactones; nanofibers; polymers; scanning electron microscopy; strength (mechanics)
Abstract:
... 4,4′-Fluoresceinoxy bisphthalonitrile (FPN) fluorophore-incorporated electrospun nanofibrous sensor strips have been fabricated for selective detection of Fe³⁺ ions in aqueous solutions. Polycaprolactone (PCL) was used as the primary polymer matrix. PCL/FPN nanofibrous membranes were prepared by solution electrospinning technique. Fibrous morphology was evaluated using scanning electron microscopy ...
DOI:
10.1007/s10853-019-03829-6

82. 4-(2-Pyridylazo)-resorcinol Functionalized Thermosensitive Ionic Microgels for Optical Detection of Heavy Metal Ions at Nanomolar Level

Author:
Zhou Xianjing; Nie Jingjing; Du Binyang
Source:
ACS Applied Materials & Interfaces 2015 v.7 no.39 pp. 21966-21974
ISSN:
1944-8252
Subject:
aqueous solutions; chelation; color; colorimetry; copper; drinking water; heavy metals; lead; manganese; metal ions; nickel; nitrogen; pH; zinc
Abstract:
... 4-(2-Pyridylazo)-resorcinol (PAR) functionalized thermosensitive ionic microgels (PAR-MG) were synthesized by a one-pot quaternization method. The PAR-MG microgels were spherical in shape with radius of ca. 166.0 nm and narrow size distribution and exhibited thermo-sensitivity in aqueous solution. The PAR-MG microgels could optically detect trace heavy metal ions, such as Cu²⁺, Mn²⁺, Pb²⁺, Zn²⁺, a ...
DOI:
10.1021/acsami.5b06653

83. 4-Ethylphenol and 4-ethylguaiacol depletion in wine using esterified cellulose

Author:
R. Larcher; C. Puecher; S. Rohregger; M. Malacarne; G. Nicolini
Source:
Food chemistry 2012 v.132 no.4 pp. 2126-2130
ISSN:
0308-8146
Subject:
Food and Drug Administration; aqueous solutions; cellulose; cellulose acetate; color; ethanol; filtration; flavanols; off flavors; pH; proanthocyanidins; propionates; red wines
Abstract:
... The ability of cellulose acetate, cellulose acetate propionate (CAP), cellulose acetate butyrate and cellulose propionate (CP) fibres to reduce 4-ethylphenol and 4-ethylguaiacol, causing the off-flavour named “Brett character”, was studied. CAP and CP performed best in a preliminary comparative test. The former was chosen because of its more favourable FDA classification for food contact substance ...
DOI:
10.1016/j.foodchem.2011.12.012

84. 4-Hydroxyphenacyl Ammonium Salts: A Photoremovable Protecting Group for Amines in Aqueous Solutions

Author:
Bownik Iwona; Šebej Peter; Literák Jaromír; Heger Dominik; Šimek Zdeněk; Givens Richard S.; Klán Petr
Source:
Journal of organic chemistry 2015 v.80 no.19 pp. 9713-9721
ISSN:
1520-6904
Subject:
acids; amino acids; ammonia; ammonium; ammonium salts; aqueous solutions; chemical reactions; irradiation; moieties; organic chemistry; pH; secondary amines
Abstract:
... Irradiation of N-protected p-hydroxyphenacyl (pHP) ammonium caged derivatives at 313 nm releases primary and secondary amines or ammonia in nearly quantitative yields via the photo-Favorskii reaction when conducted in acidic or neutral aqueous buffered media. The reaction efficiencies are strongly dependent on the pH with the most efficient and highest yields obtained when the pH of the media main ...
DOI:
10.1021/acs.joc.5b01770

85. 4-Mercaptophenyldiphenylphosphine as linker to immobilize Pd onto the surface of magnetite nanoparticles. Excellent catalytic efficiency of the system after partial linker removal

Author:
A. Guarnizo; I. Angurell; M. D. Rossell; J. Llorca; G. Muller; M. Seco; O. Rossell
Source:
RSC advances 2015 v.5 no.111 pp. 91340-91348
ISSN:
2046-2069
Subject:
aqueous solutions; catalysts; catalytic activity; hydrogen peroxide; hydrogenation; magnetite; nanocomposites; nanoparticles; p-nitrophenol; palladium; styrene; transmission electron microscopy
Abstract:
... The molecule 4-mercaptophenyldiphenylphosphine (Sdp) has been synthesized for use as a linker to immobilize Pd nanoparticles onto the surface of magnetite nanoparticles. The high loading shown by Sdp was attributed to the presence of one only anchoring (S) atom. The treatment of the resulting nanoparticles after Pd deposition with an aqueous solution of hydrogen peroxide permitted the removal of a ...
DOI:
10.1039/c5ra18953e

86. 4-Nitrophenol removal from aqueous solutions by emulsion liquid membranes using type I facilitation

Author:
G. León; M. A. Guzmán; B. Miguel
Source:
Environmental technology 2013 v.34 no.15 pp. 2309-2315
ISSN:
1479-487X
Subject:
aqueous solutions; emulsifying; emulsions; environmental technology; kerosene; liquid membranes; manufacturing; mixing; p-nitrophenol; permeability; pollutants; sodium hydroxide; surfactants
Abstract:
... Nitrophenols are common organic pollutants that enter the environment during the manufacture and processing of a variety of industrial products. The removal of 4-nitrophenol (4NP) from aqueous solutions by emulsion liquid membranes using the type I facilitated transport mechanism is investigated in this paper. The liquid membrane consisted of kerosene as the organic diluent, sorbitan monooleate as ...
DOI:
10.1080/09593330.2013.767277

87. 4-Sulfonatocalix[6]arene-Induced Aggregation of Ionic Liquids

Author:
Wintgens Véronique; Le Coeur Clémence; Amiel Catherine; Guigner Jean-Michel; Harangozó József G.; Miskolczy Zsombor; Biczók László
Source:
Langmuir 2013 v.29 no.25 pp. 7682-7688
ISSN:
1520-5827
Subject:
aqueous solutions; aromatic hydrocarbons; ionic liquids; nanoparticles; neutrons; stoichiometry
Abstract:
... The interaction of 4-sulfonatocalix[6]arene (SCX6) macrocycle with 1-alkyl-3-methylimidazolium type of ionic liquids possessing dodecyl, tetradecyl, or hexadecyl substituent was studied in aqueous solution at 298 K. Host–guest complexation promoted the spontaneous self-assembly into nanoparticles of 7:1 ionic liquid:SCX6 stoichiometry. Positively charged and stable nanoparticles were produced in s ...
DOI:
10.1021/la401185p

88. 4-Sulfonatocalixarene-induced nanoparticle formation of methylimidazolium-conjugated dextrans: Utilization for drug encapsulation

Author:
Véronique Wintgens; Jean-Michel Guigner; Zsombor Miskolczy; Catherine Amiel; László Biczók
Source:
Carbohydrate polymers 2019 v.223 pp. 115071
ISSN:
0144-8617
Subject:
alkaloids; aqueous solutions; aromatic hydrocarbons; dextran; drugs; encapsulation; imidazoles; light scattering; mixing ratio; molecular weight; nanoparticles; pH; polymers; stoichiometry; transmission electron microscopy; zeta potential
Abstract:
... Methylimidazolium side groups were grafted via ether linkage to dextran and the self-assembly of these polymers with 4-sulfonato-calix[n]arenes (SCXn) was studied in aqueous solutions. Dynamic light scattering and zeta potential measurements revealed the mixing ratio ranges of the constituents where stable nanoparticles could be created. The macrocycle size of SCXn and the molecular mass of the po ...
DOI:
10.1016/j.carbpol.2019.115071

89. 4-[18F]Fluoro-N-methyl-N-(propyl-2-yn-1-yl)benzenesulfonamide ([18F]F-SA): a versatile building block for labeling of peptides, proteins and oligonucleotides with fluorine-18 via Cu(I)-mediated click chemistry

Author:
Theres Ramenda; Jörg Steinbach; Frank Wuest
Source:
Amino acids 2013 v.44 no.4 pp. 1167-1180
ISSN:
0939-4451
Subject:
alkynes; aqueous solutions; azides; biopolymers; chemical bonding; copper; cycloaddition reactions; electrons; lipophilicity; models; oligonucleotides; phosphopeptides; proteins; radiolabeling
Abstract:
... Cu(I)-mediated [3+2]cycloaddition between azides and alkynes has evolved into a valuable bioconjugation tool in radiopharmaceutical chemistry. We have developed a simple, convenient and reliable radiosynthesis of 4-[¹⁸F]fluoro-N-methyl-N-(propyl-2-yn-1-yl)benzenesulfonamide ([ ¹⁸ F]F-SA) as a novel aromatic sulfonamide-based click chemistry building block. [ ¹⁸ F]F-SA could be prepared in a remote ...
DOI:
10.1007/s00726-012-1450-4

90. 4‐hydroxythiophenol grafted PS‐b‐PAA block copolymers: Preparation and formation of porous and bowl‐shaped assemblies

Author:
Wenting Li; Na Li; Jiaxu Zhao; Xiaokai Zhang; Xue Li
Source:
Journal of polymer science 2016 v.54 no.16 pp. 1551-1557
ISSN:
0887-6266
Subject:
aqueous solutions; composite polymers; esterification
Abstract:
... 4‐Hydroxythiophenol (HTP) grafted poly(styrene‐b‐acrylic acid) (PS‐b‐PAA) block copolymers (BCPs) (PS‐b‐PAA‐g‐HTP) was synthesized using the esterification reaction between the carboxyl groups and hydroxyl groups. Self‐assembly behavior of the graft copolymer in 1,4‐dioxane/water was investigated. Assemblies of different morphologies, porous, and bowl‐shaped structures, could be easily prepared. A ...
DOI:
10.1002/polb.24067

91. 5,5-Dimethyl-2-pyrrolidone-N-oxyl formation in electron spin resonance studies of electrolyzed NaCl solution using 5,5-dimethyl-1-pyrroline-N-oxide as a spin trapping agent

Author:
Stan, S.D.; Daeschel, M.A.
Source:
Journal of agricultural and food chemistry 2005 v.53 no.12 pp. 4906-4910
ISSN:
0021-8561
Subject:
oxygen; free radicals; sodium chloride; aqueous solutions; heterocyclic nitrogen compounds; oxidation; sodium citrate; chlorine dioxide; electron paramagnetic resonance spectroscopy; disinfectants; disinfection
Abstract:
... Electrolyzed oxidizing (EO) water has recently generated much interest as a disinfectant in the food industry. 5,5-Dimethyl-1-pyrroline-N-oxide (DMPO) is a spin trapping agent widely used in the electron spin resonance (ESR) characterization of oxygen-centered free radicals. The reaction between electrolyzed water, collected from the anode side of a two-chamber electrolyzer, and DMPO was investiga ...
DOI:
10.1021/jf047918k

92. 5-Aminolevulinic acid moderates environmental stress-induced bunch wilting and stress markers in date palm

Author:
Majid Alikhani-Koupaei; Reza Fatahi; Zabihollah Zamani; Saeedeh Salimi
Source:
Acta physiologiae plantarum 2018 v.40 no.8 pp. 159
ISSN:
0137-5881
Subject:
Phoenix dactylifera; aminolevulinic acid; aqueous solutions; biosynthesis; catalase; chlorophyll; climatic factors; elicitors; enzyme activity; foliar application; fruit set; fruits; hydrogen peroxide; leaves; peroxidase; proline; relative humidity; stress tolerance; superoxide dismutase; temperature; trees; wilting; Iran
Abstract:
... Bunch wilting, a disorder of date palm (Phoenix dactylifera L.) and caused by climatic factors (low relative humidity along with high temperatures), critically damages its production in Iran. In this study, the effects of 5-aminolevulinic acid (5-ALA) as precursor of chlorophyll and elicitor of antioxidants applied to be involve directly or indirectly in stress tolerance mechanisms, bunch wilting ...
DOI:
10.1007/s11738-018-2720-x

93. 5-Selenocyanato and 5-trifluoromethanesulfonyl derivatives of 2′-deoxyuridine: synthesis, radiation and computational chemistry as well as cytotoxicity

Author:
Samanta Makurat; Magdalena Zdrowowicz; Lidia Chomicz-Mańka; Witold Kozak; Illia E. Serdiuk; Paweł Wityk; Alicja Kawecka; Marta Sosnowska; Janusz Rak
Source:
RSC advances 2018 v.8 no.38 pp. 21378-21388
ISSN:
2046-2069
Subject:
X-radiation; acidity; aqueous solutions; cell lines; chemical bonding; cytotoxicity; deprotonation; dissociation; hydroxyl radicals; nuclear magnetic resonance spectroscopy; prediction; radiolysis; thermodynamics
Abstract:
... 5-Selenocyanato-2′-deoxyuridine (SeCNdU) and 5-trifluoromethanesulfonyl-2′-deoxyuridine (OTfdU) have been synthesized and their structures have been confirmed with NMR and MS methods. Both compounds undergo dissociative electron attachment (DEA) when irradiated with X-rays in an aqueous solution containing a hydroxyl radical scavenger. The DEA yield of SeCNdU significantly exceeds that of 5-bromo- ...
DOI:
10.1039/c8ra03172j

94. 5-Sulfosalicylic acid as an acid hydrotrope for the rapid and green fractionation of woody biomass

Author:
Qiaolong Zhai; Shuangmei Han; Chung-Yun Hse; Jianchun Jiang; Junming Xu
Source:
Industrial crops and products 2022 v.177 pp. 114435
ISSN:
0926-6690
Subject:
Populus; aqueous solutions; catalysts; cellulose; density functional theory; enzymatic hydrolysis; fractionation; glucose; hemicellulose; hydrogen bonding; lignin; saccharification; solvents; woody biomass
Abstract:
... This study reported that 5-sulfosalicylic acid (5-SSA), a solid acid with hydrotropic properties, could efficiently and rapidly fractionate poplar biomass in an aqueous solution at mild conditions. The experimental results showed that 5-SSA-treatment could deconstruct the biomass recalcitrant intercellular structure and has excellent potential in lignin and hemicellulose dissolution and glucose re ...
DOI:
10.1016/j.indcrop.2021.114435

95. 6-(2-Formyl-5-methyl-1H-pyrrol-1-yl)hexanoic Acid as a Novel Retronasal Burnt Aroma Compound in Soy Sauce Aroma-Type Chinese Baijiu

Author:
Tengfei Zhao; Derang Ni; Guangyuan Hu; Li Wang; Shuang Chen; Yan Xu
Source:
Journal of agricultural and food chemistry 2019 v.67 no.28 pp. 7916-7925
ISSN:
1520-5118
Subject:
additive effect; aqueous solutions; ethanol; hexanoic acid; high performance liquid chromatography; mass spectrometry; nuclear magnetic resonance spectroscopy; odor compounds; odors; pyrazines; quantitative analysis; sensory evaluation; soy sauce; taste
Abstract:
... Two-step high-performance liquid chromatography (HPLC) separation in combination with taste dilution analysis was used to screen the retronasal burnt aroma compounds in soy sauce aroma-type Chinese Baijiu (Chinese traditional liquor). A major retronasal burnt aroma region was purified by Sephadex LH-20 column chromatography and HPLC separation from the soy sauce aroma-type Baijiu sample. A novel r ...
DOI:
10.1021/acs.jafc.9b02095

96. 6-Aminocaproic acid as a linker to improve near-infrared fluorescence imaging and photothermal cancer therapy of PEGylated indocyanine green

Author:
Qiang Hu; Kesi Wang; Liyan Qiu
Source:
Colloids and surfaces 2021 v.197 pp. 111372
ISSN:
0927-7765
Subject:
aqueous solutions; cancer therapy; fluorescence; hydrophobicity; irradiation; micelles; neoplasms; photothermotherapy; precision medicine; xenotransplantation
Abstract:
... Clinical extensive application of indocyanine green (ICG) is limited by several drawbacks such as poor bioenvironmental stability, aggregate propensity, and rapid elimination from the body, etc. In this study, we construct a novel amphiphilic mPEG-ACA-ICG conjugate by modifying synthetic heptamethine cyanine derivative ICG-COOH with a hydrophobic linker 6-aminocaproic acid (ACA) and amino-terminal ...
DOI:
10.1016/j.colsurfb.2020.111372

97. 7-N-Acetylcysteine-pyrrole conjugate—A potent DNA reactive metabolite of pyrrolizidine alkaloids

Author:
Xiaobo He; Liang Ma; Qingsu Xia; Peter P. Fu
Source:
Yàowù shípǐn fēnxī 2016 v.24 no.4 pp. 682-694
ISSN:
1021-9498
Subject:
DNA; acetylcysteine; aqueous solutions; calves; cytotoxicity; drugs; enzymatic hydrolysis; genotoxicity; humans; liver microsomes; metabolism; metabolites; monocrotaline; poisonous plants; proteins; rats; riddelliine; thymus gland; wildlife
Abstract:
... Plants containing pyrrolizidine alkaloids (PAs) are widespread throughout the world and are the most common poisonous plants affecting livestock, wildlife, and humans. PAs require metabolic activation to form reactive dehydropyrrolizidine alkaloids (dehydro-PAs) that are capable of alkylating cellular DNA and proteins, form (±)-6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizine (DHP)-DNA and DHP ...
DOI:
10.1016/j.jfda.2016.08.001

98. 7-cysteine-pyrrole conjugate: A new potential DNA reactive metabolite of pyrrolizidine alkaloids

Author:
Xiaobo He; Qingsu Xia; Liang Ma; Peter P. Fu
Source:
Journal of environmental science and health 2016 v.34 no.1 pp. 57-76
ISSN:
1532-4095
Subject:
DNA adducts; aqueous solutions; calves; cytotoxicity; genotoxicity; humans; liver microsomes; liver neoplasms; metabolism; metabolites; monocrotaline; rats; riddelliine; thymus gland
Abstract:
... Pyrrolizidine alkaloids (PAs) require metabolic activation to exert cytotoxicity, genotoxicity, and tumorigenicity. We previously reported that (±)-6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizine (DHP)-derived DNA adducts are responsible for PA-induced liver tumor formation in rats. In this study, we determined that metabolism of riddelliine and monocrotaline by human or rat liver microsomes ...
DOI:
10.1080/10590501.2015.1135593

99. 8-Hydroxyquinoline-5-sulfonic acid as the modifier for the determination of trace elements in cereals by slurry sampling electrothermal vaporization ICP-MS

Author:
Shih-Yi Huang; Shiuh-Jen Jiang
Source:
Analytical methods 2010 v.2 no.9 pp. 1310-1315
ISSN:
1759-9679
Subject:
aqueous solutions; atomic absorption spectrometry; atomization; cadmium; chromium; cobalt; copper; detection limit; ions; lead; markets; mercury; methane; nickel; rice flour; slurries; ultrasonics; vanadium; volatilization; wheat flour; zinc
Abstract:
... Ultrasonic slurry sampling electrothermal vaporization inductively coupled plasma mass spectrometry (USS-ETV-ICP-MS) has been applied to determine V, Cr, Co, Ni, Cu, Zn, Se, Cd, Hg and Pb in cereal samples. 8-hydroxyquinoline-5-sulfonic acid (8-HQ-5-SA) was used as the modifier to increase the volatility of the elements studied which makes the quantification possible using external calibration. Th ...
DOI:
10.1039/c0ay00367k

100. 8-Hydroxyqunoline adsorption from aqueous solution using powdered orange peel: kinetic and isotherm study

Author:
Khalid Siraj; Dema Deso; Demelash Jado; Girma Selale
Source:
Acta Universitatis Sapientiae. Agriculture and environment 2015 v.7 no.1 pp. 36-46
ISSN:
2068-2964
Subject:
8-hydroxyquinoline; adsorbents; adsorption; aqueous solutions; heat production; kinetics; models; orange peels; particle size; sorption isotherms
Abstract:
... Adsorption of 8-hydroxyquinoline (8HQ) on powdered orange peel (POP), a locally available adsorbent, has been studied. Experiment was performed on different 8HQ concentration, particle size, and adsorbent dosage. The Langmuir and Freundlich adsorption isotherm model has been tested. The obtained results best fitted the Langmuir model, suggesting monolayer adsorption of 8HQ on POP. The kinetic stud ...
DOI:
10.1515/ausae-2015-0003