Complex coacervation of hyaluronic acid and chitosan: effects of pH, ionic strength, charge density, chain length and the charge ratio

Soft Matter ◽  
2015 ◽  
Vol 11 (44) ◽  
pp. 8605-8612 ◽  
Author(s):  
A. B. Kayitmazer ◽  
A. F. Koksal ◽  
E. Kilic Iyilik
Keyword(s):  
Hyaluronic Acid ◽  
Ionic Strength ◽  
Charge Density ◽  
Chain Length ◽  
Charge Ratio ◽  
Complex Coacervation ◽  
Zeta Potentials ◽  
Interpolyelectrolyte Complexes ◽  
Effects Of Ph

Hyaluronic acid/chitosan interpolyelectrolyte complexes form the first example of coacervates from semiflexible polyelectrolytes. Interestingly, these coacervates form at charge ratios different than 1 : 1 and zeta potentials far away from zero.

Effects of pH and ionic strength on the cation exchange capacity of soils with variable charge

Soil Research ◽  
1981 ◽  
Vol 19 (1) ◽  
pp. 93 ◽  
Author(s):  
GP Gillman
Keyword(s):  
Ionic Strength ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Surface Soils ◽  
Ph Values ◽  
Variable Charge ◽  
Effects Of Ph ◽  
Variable Charge Soils

The cation exchange capacity of six surface soils from north Queensland and Hawaii has been measured over a range of pH values (4-6) and ionic strength values (0.003-0.05). The results show that for variable charge soils, modest changes in electrolyte ionic strength are as important in their effect on caton exchange capacity as are changes in pH values.

Evaluation of effects of pH and ionic strength on colloidal stability of IgG solutions by PEG-induced liquid-liquid phase separation

2016 ◽  
Vol 145 (18) ◽  
pp. 185101 ◽  
Author(s):  
Ronald W. Thompson ◽  
Ramil F. Latypov ◽  
Ying Wang ◽  
Aleksey Lomakin ◽  
Julie A. Meyer ◽  
...  
Keyword(s):  
Phase Separation ◽  
Ionic Strength ◽  
Liquid Phase ◽  
Colloidal Stability ◽  
Liquid Phase Separation ◽  
Effects Of Ph ◽  
Liquid Liquid Phase Separation

Effects of pH, aluminium, and soft water on larvae of the amphibians Bufo bufo and Triturus vulgaris

2006 ◽  
Vol 84 (11) ◽  
pp. 1668-1677 ◽  
Author(s):  
Jon K. Skei ◽  
Dag Dolmen
Keyword(s):  
Ionic Strength ◽  
High Mortality ◽  
Bufo Bufo ◽  
Soft Water ◽  
Internal Environment ◽  
Triturus Vulgaris ◽  
Effects Of Ph ◽  
Low Ionic Strength

Larval Bufo bufo (L., 1758) and Triturus vulgaris (L., 1758) were exposed to soft water (0.5 mg·L–1 Ca2+) experimentally acidified to pH 3.9 to 5.9 and total aluminium concentrations of <10, 150, and 300 µg·L–1. Below pH 4.5 both species experienced increased mortality. The LC50 (168 h) for <10 and 150 µg·L–1 Al was pH 4.3 and 4.1 for B. bufo and 4.2 and 4.1 for T. vulgaris. However, Al3+ increased the survival of both species, which may be due to the contribution of Al3+ to the ionic strength. No B. bufo larvae died at pH >4.5, whereas T. vulgaris at higher Al concentrations suffered relatively high mortality at pH 5.1–5.9, where Al occurs mainly as Al(OH)2+ and Al(OH)2+. Unlike external gills (T. vulgaris), internal gills (B. bufo) have their own internal environment and are probably better protected against the presence of these toxic Al species in the water. These Al species thus seem to be toxic to T. vulgaris larvae but not to B. bufo. Chloride was seen to be important for survival in water of low ionic strength, since the survival of T. vulgaris larvae, particularly at low Al concentration, increased at pH levels down to pH 4.3 when the water was acidified with HCl.

Effects of chain length and hydrophobicity/charge ratio of AMP on its antimicrobial activity

2017 ◽  
Vol 60 (3) ◽  
pp. 385-395 ◽  
Author(s):  
Qiuhong Yu ◽  
Zhengxi Zhang ◽  
Jianbo Sun ◽  
Yuqiong Xia ◽  
Quan Du ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chain Length ◽  
Charge Ratio

Proximal Adsorption at Glass Surfaces:  Ionic Strength, pH, Chain Length Effects

Langmuir ◽  
2004 ◽  
Vol 20 (2) ◽  
pp. 378-388 ◽  
Author(s):  
William J. Lokar ◽  
William A. Ducker
Keyword(s):  
Ionic Strength ◽  
Chain Length ◽  
Glass Surfaces ◽  
Length Effects
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