Synthesis and thermoresponsive properties of OEGylated polypeptide with a LCST at body temperature in water and with a UCST in alcohol or ethanol/water solvent mixture

2017 ◽  
Vol 56 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Chenglong Ge ◽  
Wenjun Liu ◽  
Ying Ling ◽  
Haoyu Tang
Keyword(s):  
Body Temperature ◽  
Solvent Mixture ◽  
Water Solvent

scholarly journals Evaluation of Acidity Constants and Evolution of Electronic Features of Phenol Derivatives in Different Compositions of Methanol/Water Mixture

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Mahmood Sanchooli
Keyword(s):  
Binary Mixture ◽  
Solvent Mixture ◽  
Solvent Mixtures ◽  
Water Mixture ◽  
Quantum Chemical Descriptors ◽  
Acidity Constants ◽  
Reaction Field ◽  
Phenol Derivatives ◽  
Orbital Energies ◽  
Water Solvent

This work was devoted to evaluation of acidity constants of 28 phenol derivatives in 11 different compositions of methanol/water solvent mixtures. The Onsager reaction field model was applied to any molecule of phenol derivatives dissolved in binary mixture of methanol/water, and the quantum chemical descriptors of the solute were calculated. Multiple linear regression was used to perform the reliable QSPR models in order to predict the acidity constants of the solutes. It was explored that the solvation of phenol derivatives in solvent of binary mixture of methanol/water shows a different behavior as the composition of methanol varies. Four different mechanisms proposed for solvation in 0–100 volume percent of methanol solvent. It was seen that the dipole-dipole interactions increase as the amount of methanol increases in solvent mixture, which implies the contribution of highly negative oxygens of methanol on hydrogen bondings between solute and solvent cavity. The orbital energies are a major electronic descriptor on solvation processes. This proposes that the charge exchange between frontier orbital energies of anions and the solvent molecules is the major event occurring in solution in order to stabilize the produced anions.

Solubility and Density of Potassium Iodide in a Binary Propan-1-ol−Water Solvent Mixture at (298.15, 303.15, 308.15, and 313.15) K

2010 ◽  
Vol 55 (3) ◽  
pp. 1314-1316 ◽  
Author(s):  
Ramesh R. Pawar ◽  
Sambhaji M. Golait ◽  
Mehdi Hasan ◽  
Arun B. Sawant
Keyword(s):  
Potassium Iodide ◽  
Solvent Mixture ◽  
Water Solvent

A Method for the Determination of Cadmium in Plant Material by Atomic Absorption Spectroscopy

1976 ◽  
Vol 30 (6) ◽  
pp. 607-610 ◽  
Author(s):  
Duane R. Boline ◽  
W. G. Schrenk
Keyword(s):  
Atomic Absorption ◽  
Plant Material ◽  
Preliminary Investigation ◽  
Colorimetric Method ◽  
Solvent Mixture ◽  
Operating Conditions ◽  
Water Solvent ◽  
Alcohol Water ◽  
Other Substances ◽  
Significant Interference

A method for determining cadmium in plant material by direct aspiration of a solution of the ashed sample in an alcohol-water solvent mixture was investigated. The method was applied to samples containing 0.35 to 3.10 µg of Cd per g. Operating conditions for using an acetylene-air flame were established and flame interference effects minimized; no significant interference was noted from other elements present in plants. Wet and dry ashing procedures provided comparable results. The recovery of added cadmium ranged from 87 to 104%, most values being near 100%. Comparing the AOAC and atomic absorption methods indicated that the atomic absorption method is as reliable and accurate as the official AOAC colorimetric method. Furthermore, it is simpler and faster. A preliminary investigation of the feasibility of using an electrically heated tantalum boat for this type of analysis indicated significant interference by other substances in the sample. Further study of the heated vaporization technique is needed.

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