Conductivity anomalies of aqueous carboxylic acid solutions. Dimerization or effect of solvent medium

1975 ◽  
Vol 79 (14) ◽  
pp. 1450-1455 ◽  
Author(s):  
R. B. Simpson
Keyword(s):  
Carboxylic Acid ◽  
Acid Solutions ◽  
Solvent Medium ◽  
Effect Of Solvent ◽  
Conductivity Anomalies

scholarly journals Effect of Solvent on the Hydrodynamic Properties of Collagen

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3626
Author(s):  
Katarzyna Lewandowska ◽  
Marta Szulc ◽  
Alina Sionkowska
Keyword(s):  
Acetic Acid ◽  
Sodium Chloride ◽  
Carboxylic Acid ◽  
Uv Light ◽  
Acid Solutions ◽  
Denaturation Temperature ◽  
Hydrodynamic Properties ◽  
Citrate Buffer ◽  
Effect Of Solvent ◽  
Viscosity Behavior

In this study, the effect of solvent on the hydrodynamic properties of collagen extracted from tail tendons of young rats was researched. Collagen was dissolved in various aqueous carboxylic acid solutions, including acetic acid (AA), acetic acid with the addition of sodium chloride (AA/NaCl), formic acid (FA), lactic acid (LA), citric acid (CA), and also citrate buffer at pH = 3.7 (CB). The properties of collagen solutions at a concentration of 0.45 mg/mL were characterized based on the viscometric method. The reduced viscosity, intrinsic viscosity, and Huggins coefficient of collagen solutions and effect of solvent, temperature, and UV irradiation on these properties were investigated. Collagen solutions in acetic acid, acetic acid/NaCl, and citrate buffer were irradiated with UV light up to 1 h, and the viscosity of collagen solutions was measured. It was found that the organic acids used as solvent affected viscosity behavior, denaturation temperature, and stability of collagen solutions. The lowest values of studied parameters were obtained for the collagen solutions in acetic acid with the addition of sodium chloride. Thus, the effect of various aqueous carboxylic acid solutions on collagen solutions properties and denaturation temperature can also be affected by the sodium chloride addition. The results of this research can be crucial for the preparation of collagen solutions for both cosmetic and biomedical applications.

Conditions for the formation of bayerite and gibbsite

1971 ◽  
Vol 38 (295) ◽  
pp. 358-368 ◽  
Author(s):  
W. J. Mchardy ◽  
A. P. Thomson
Keyword(s):  
Electron Microscopy ◽  
Carboxylic Acid ◽  
Electron Diffraction ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Acid Solutions ◽  
Salt Solutions ◽  
X Ray ◽  
Hydrolysis Of ◽  
Positively Charged

SummaryAluminium hydroxide gels have been prepared by the hydrolysis of amalgamated aluminium in water and by precipitation from aluminium salt solutions with an anion exchange resin in the hydroxyl form. The products crystallizing from such gels have been examined by electron microscopy and by X-ray and electron diffraction. Bayerite crystallizes as cone or pyramid-shaped particles and gibbsite as hexagonal plates or prisms. Two types of gel are postulated. The first type, pseudoboehmite, predominates in the absence of acids, is uncharged and rapidly crystallizes to bayerite; the second type, pregibbsite gel, occurs in carboxylic acid solutions, is positively charged and, in the absence of inorganic anions, crystallizes slowly to gibbsite.

scholarly journals Surface-controlled dissolution rates: a case study of nanoceria in carboxylic acid solutions

2019 ◽  
Vol 6 (5) ◽  
pp. 1478-1492 ◽  
Author(s):  
Eric A. Grulke ◽  
Matthew J. Beck ◽  
Robert A. Yokel ◽  
Jason M. Unrine ◽  
Uschi M. Graham ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Acid Solutions ◽  
Dissolution Rates ◽  
Therapeutic Applications

Nanoparticle dissolution in local milieu can affect its ecotoxicity and therapeutic applications.

Sign in / Sign up

Export Citation Format

Share Document