Particle-macromolecule interactions in aqueous solutions Part 1: Solution and flow behaviour of polyvinylalcohol in an aqueous medium

1978 ◽  
Vol 256 (11) ◽  
pp. 1073-1078 ◽  
Author(s):  
D. Eagland ◽  
G. C. Wardlaw ◽  
I. Thorn
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Flow Behaviour

Electrosynthesis of Organic Amalgam from Tetraethylammonium Tetrafluoroborate in Aqueous Medium

1994 ◽  
Vol 59 (11) ◽  
pp. 2375-2382 ◽  
Author(s):  
Simon Krásenský ◽  
Marie Studničková
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Anodic Oxidation ◽  
Room Temperature ◽  
Ph Value ◽  
Binary Compound ◽  
Black Precipitate ◽  
Mercury Cathode ◽  
Simultaneous Evolution

The electroreduction of neutral aqueous solutions of 0.1 - 0.5 M Et4NBF4 on a mercury cathode at room temperature at -2.8 - -2.4 V produces a black precipitate of Et4N . Hgx with simultaneous evolution of hydrogen (the pH value increases to 12). No anodic oxidation of the amalgam has been observed in the interval of 0 - 2.8 V. The composition of the precipitate, collected by filtration under nitrogen, has been determined from the decrease of Et4N+ in the solution after electrolysis and from analysis of mercury in the binary compound Et4N . Hgx. The value x = 2.9 ± 0.8 has been found.

Viscosimetric studies of chitosan nitrate and chitosan chlorhydrate in acid free NaCl aqueous solution

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Cristóbal Lárez Velásquez ◽  
Joel Sánchez Albornoz ◽  
Enrique Millán Barrios
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Intrinsic Viscosity ◽  
Free Acid ◽  
Film Formation ◽  
Stiffness Parameter ◽  
Low Ionic Strength

AbstractTwo salts of the biopolymer chitosan were prepared in aqueous medium by employing an excess of HCl or HNO3 in order to ensure neutralization of all NH2-chitosan groups. Chitosan salts were extensively dialyzed in dionised water and dried at 40 ºC until film formation. The films were characterized by thermogravimetry, FTIR and conductimetric tritration. QH+Cl− and QH+NO3− salts were viscosimetrically evaluated in free acid aqueous solutions in the presence of NaCl to control ionic strength of the medium. Unexpected high intrinsic viscosity values were obtained at low ionic strength when QH+NO3− salt were evaluated. Smidsrod´s approach was employed to estimate the stiffness parameter of both salts and B = 0.084 and 0.120 for QH+Cl− and QH+NO3−, respectively, were obtained.

scholarly journals Synthesis of Magnetic Biochar for Efficient Removal of Cr(III) Cations from the Aqueous Medium

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Liliya Frolova ◽  
Mykola Kharytonov
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Plasma Reactor ◽  
Subsequent Treatment ◽  
Adsorption Properties ◽  
Sorption Properties ◽  
Efficient Removal ◽  
Magnetic Biochar ◽  
High Sorption ◽  
Coniferous Woods

Porous biochars obtained from coniferous woods, and magnetic biochars based on them, which showed high sorption properties when extracting Cr(III) from aqueous solutions (from 0.005 to 0.0125 mol/L), were studied. The adsorption properties of the magnetic biochar are compared with the initial biochar. It has been established that the preparation of materials by the method of pyrolysis and subsequent treatment in a plasma reactor makes it possible to bring the samples under study into a number of promising adsorbents for the extraction of chromium from aqueous solutions.

Trapping of Dieldrin Lost from Aqueous Algae Cultures

1969 ◽  
Vol 52 (4) ◽  
pp. 760-764 ◽  
Author(s):  
W B Wheeler
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Short Length ◽  
Chromatographic Column ◽  
Column Packing

Abstract The treatment given to aqueous solutions containing dieldrin governed the quantity of insecticide lost by co-distillation with water. Co-distilling dieldrin may be effectively trapped on a short length of a common gas chromatographic column packing (5% DC-200 on 80–100 mesh Gas Chrom Q) and easily eluted for quantitation. Algae present in the aqueous medium reduced the loss of insecticide by this mechanism.

The audio frequency conductances of magnesium, manganese II, and barium malonates in aqueous medium at 25 °C

1990 ◽  
Vol 68 (5) ◽  
pp. 770-773 ◽  
Author(s):  
Anis A. Al-Najar ◽  
Awatif M. Ibrahim
Keyword(s):  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Audio Frequency ◽  
Parameter Equation ◽  
Conductance Data

The conductance of aqueous solutions of magnesium, manganese II, and barium malonates has been measured at 1.59 kHz, using a conventional audio frequency bridge. Conductance data were evaluated using different modern theoretical conductance equations, each a three-parameter equation in KA, Λ0, and a. These are the complete and expanded forms of both the Fuoss–Hsia (F/H) and Pitts (P) equations and the Lee–Wheaton (L/W) equation. Our results show that the Lee–Wheaton equation is the most satisfactory. Keywords: conductance, aqueous medium, magnesium malonate, manganese malonate, barium malonate.

Non-Newtonian flow behaviour of gellan gum aqueous solutions

1999 ◽  
Vol 277 (8) ◽  
pp. 727-734 ◽  
Author(s):  
E. Miyoshi ◽  
K. Nishinari
Keyword(s):  
Aqueous Solutions ◽  
Gellan Gum ◽  
Flow Behaviour ◽  
Newtonian Flow

A red-emitting fluorescent probe for the detection of Hg2+ in aqueous medium, living cells and organisms with a large Stokes shift

2018 ◽  
Vol 16 (27) ◽  
pp. 5036-5042 ◽  
Author(s):  
Lei Yang ◽  
Yuanan Su ◽  
Yani Geng ◽  
Haiqing Xiong ◽  
Jinliang Han ◽  
...  
Keyword(s):  
Detection Limit ◽  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Fluorescent Probe ◽  
Stokes Shift ◽  
Living Cells ◽  
Selective Detection ◽  
Red Emission ◽  
Large Stokes Shift ◽  
Low Detection Limit

A vinethene-based fluorescent probe has been developed for the sensitive and selective detection of Hg2+ with a low detection limit, a red emission and a large Stokes shift. The probe has been successfully applied to detect Hg2+ in aqueous solutions, living cells and organisms.

scholarly journals Intrinsic Viscosity and Flow Behaviour of Arabic Gum Aqueous Solutions

2008 ◽  
Vol 11 (4) ◽  
pp. 773-780 ◽  
Author(s):  
Diego Gómez-Díaz ◽  
José M. Navaza ◽  
L.C. Quintáns-Riveiro
Keyword(s):  
Aqueous Solutions ◽  
Intrinsic Viscosity ◽  
Flow Behaviour ◽  
Arabic Gum

Self-aggregation of Methylene Blue in aqueous medium and aqueous solutions of Bu4NBr and urea

2000 ◽  
Vol 2 (19) ◽  
pp. 4313-4317 ◽  
Author(s):  
Kesharsingh Patil ◽  
Rajesh Pawar ◽  
Pandurang Talap
Keyword(s):  
Methylene Blue ◽  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Self Aggregation

Unprecedented self-assembled architectures of surface-active ionic liquids in aqueous medium

2018 ◽  
Vol 54 (19) ◽  
pp. 2432-2435 ◽  
Author(s):  
Gurbir Singh ◽  
Manvir Kaur ◽  
Markus Drechsler ◽  
Tejwant Singh Kang
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Aqueous Medium ◽  
Self Assembly ◽  
First Report ◽  
Low Concentrations ◽  
Surface Active ◽  
Self Assembled

A first report on bilayer architectures from self-assembly of SAILs without any additive in aqueous solutions at very low concentrations.

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