The conformations of hyaluronan in aqueous solution: comparison of theory and experiment

1999 ◽  
Vol 27 (2) ◽  
pp. 121-124 ◽  
Author(s):  
J. Sheehan ◽  
A. Brass ◽  
A. Almond
Keyword(s):  
Aqueous Solution ◽  
Theory And Experiment

RETRACTED: Determination of the electrode potentials for substituted 1,2-dihydroxybenzenes in aqueous solution: Theory and experiment

2006 ◽  
Vol 774 (1-3) ◽  
pp. 107-111 ◽  
Author(s):  
Siavash Riahi ◽  
Mohamad Reza Ganjali ◽  
Abdolmajid Bayandori Moghaddam ◽  
Parviz Norouzi ◽  
Marjan Niasari
Keyword(s):  
Aqueous Solution ◽  
Solution Theory ◽  
Electrode Potentials ◽  
Theory And Experiment

Feasibility Analysis of Electrodeposited Cu-W-Co Alloys

2014 ◽  
Vol 881-883 ◽  
pp. 702-707 ◽  
Author(s):  
Yuan Hui Li ◽  
Zhong Cheng Guo ◽  
Bi Fang Huang ◽  
Hui Huang
Keyword(s):  
Aqueous Solution ◽  
Copper Alloys ◽  
Electrical Contact ◽  
Copper Matrix ◽  
Feasibility Analysis ◽  
Cobalt Ions ◽  
Contact Materials ◽  
Co Alloys ◽  
Contact Field ◽  
Theory And Experiment

Electrodeposited environmental and energy-saving electrodeposited copper alloys materials without silver element will be one of the hotspots on the exploitation of the copper matrix electrical contact field. Theoretically expression of Cu, W, Co and Cu-W-Co alloys electrodeposition possibility is thermodynamically analyzed by the potential-pH plots of Cu-H2O,Co-H2O and W-H2O at normal temperature. It is found that Cu, Co can be deposited together in Cu2+,Co2+aqueous solution. Cu-W isn’t deposited from it’s Cu2+,WO42-aqueous solution, only if Co-W induced deposition under the cobalt ions’ circumstances. So, It is possible that Cu-W-Co alloys are prepared from Cu2+,Co2+,WO42-aqueous solution by the electrodeposition in the theory and experiment, which will be new method and theory for Cu-W-Co serial contact materials’ preparation.

scholarly journals The vibrational spectrum of 1,4-dioxane in aqueous solution – theory and experiment

2016 ◽  
Vol 40 (9) ◽  
pp. 7663-7670 ◽  
Author(s):  
Piotr Borowski ◽  
Wojciech Gac ◽  
Peter Pulay ◽  
Krzysztof Woliński
Keyword(s):  
Aqueous Solution ◽  
Vibrational Spectrum ◽  
Solution Theory ◽  
Frequency Shifts ◽  
Solvation Models ◽  
Explicit Solvation ◽  
Theory And Experiment

Frequency shifts in dioxane–water mixtures were studied using conductor-like screening and explicit solvation models, showing predominance of the latter one.

scholarly journals Polyelectrolyte hydration: Theory and experiment

2008 ◽  
Vol 80 (6) ◽  
pp. 1253-1266 ◽  
Author(s):  
Vojko Vlachy
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Integral Equation ◽  
Theoretical Approach ◽  
Short Review ◽  
Integral Equation Theory ◽  
Stat Phys ◽  
Specific Effects ◽  
Polyelectrolyte Solutions ◽  
Theory And Experiment

A short review of recent theoretical and experimental advances in studies of polyelectrolyte solutions is presented. The focus is on ion-specific effects as revealed in measurements of osmotic pressure and enthalpy of dilution. We review the experimental results for two different polyelectrolyte systems: (i) salts of polyanetholesulfonic acid, and (ii) aliphatic ionenes (polycations) in aqueous solution with various counterions. A theoretical approach based on the extension of Wertheim's integral equation theory [J. Stat. Phys.35, 19 (1984)] is used to analyze the experimental data. Preliminary results, based on the all-atom simulation of model 3,3 ionene oligomers, are discussed in the light of polyelectrolyte hydration.

Structures Formed by Cryoprotective Agents Used in Freezc-Etching

1971 ◽  
Vol 29 ◽  
pp. 448-449
Author(s):  
G. G. Cocks ◽  
C. E. Cluthe
Keyword(s):  
Aqueous Solution ◽  
Polyethylene Oxide ◽  
Liquid Nitrogen Temperature ◽  
Ice Crystals ◽  
Etching Technique ◽  
Structural Constituent ◽  
Cryoprotective Agents ◽  
Quick Freezing ◽  
Freeze Etching ◽  
Fractured Surface

The freeze etching technique is potentially useful for examining dilute solutions or suspensions of macromolecular materials. Quick freezing of aqueous solutions in Freon or propane at or near liquid nitrogen temperature produces relatively large ice crystals and these crystals may damage the structures to be examined. Cryoprotective agents may reduce damage to the specimem, hut their use often results in the formation of a different set of specimem artifacts.In a study of the structure of polyethylene oxide gels glycerol and sucrose were used as cryoprotective agents. The experiments reported here show some of the structures which can appear when these cryoprotective agents are used.Figure 1 shows a fractured surface of a frozen 25% aqueous solution of sucrose. The branches of dendritic ice crystals surrounded hy ice-sucrose eutectic can be seen. When this fractured surface is etched the ice in the dendrites sublimes giving the type of structure shown in Figure 2. The ice-sucrose eutectic etches much more slowly. It is the smooth continuous structural constituent surrounding the branches of the dendrites.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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