scholarly journals Effect of pH on the Conformation of Inclusion Complexes between β-Lactam Antibiotics and β-Cyclodextrins in Aqueous Solution

2010 ◽  
Vol 67 (3) ◽  
pp. 192-197 ◽  
Author(s):  
Miho YUKAWA ◽  
Hanae MORIWAKI ◽  
Taichi MURAKAMI ◽  
Hirohito IKEDA ◽  
Yukiko IWASE ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Inclusion Complexes ◽  
Effect Of Ph

scholarly journals Effect of pH on Biosorption Ion Cd(II) in Solutions using Lengkuas Merah (Alpinia Gralanga)

2018 ◽  
Vol 1 (1) ◽  
pp. 31
Author(s):  
Ahmad Faris Fauzi ◽  
Lisa Utami
Keyword(s):  
Waste Water ◽  
Aqueous Solution ◽  
Low Cost ◽  
Effect Of Ph ◽  
Biosorption Capacity ◽  
Optimum Ph

The biosorption characteristic of Cd(II) ions from aqueous solution using Lengkuas Merah (Alpinia Gralanga) were investigated as a function of pH. The maximum biosorption capacity of a Lengkuas Merah (Alpinia Gralanga) for Cd(II) was found to be 18,37 mg/L and 91,85% at optimum pH was 10. At pH 2 to 10 the biosorption of Cd ions tends to increase. The result showed that the lengkuas merah  can be evaluated as an alternative biosorbent to treatment waste water containing Cd(II). A Lengkuas Merah is low cost and has considerable high biosorption capacity.

Evaluation of the phase solubility of inclusion complexes of diisopropylphenol (INN) with hydroxypropyl-β-cyclodextrin

2021 ◽  
pp. 27-32
Author(s):  
Olga Mikhailovna Balakhonova ◽  
Viktoriya Sergeevna Tyukova ◽  
Stanislav Anatolievich Kedik
Keyword(s):  
Aqueous Solution ◽  
Inclusion Complex ◽  
Inclusion Complexes ◽  
Tween 80 ◽  
Phase Solubility ◽  
Cyclodextrin Inclusion ◽  
Solubility Method ◽  
Cyclodextrin Inclusion Complex ◽  
The Stability ◽  
Solubility Profiles

The paper presents the results of a study of the stability of aqueous solutions of inclusion complexes of hydroxypropyl-β-cyclodextrin with diisopropylphenol in various systems by the Higuchi-Connors phase solubility method. The phase solubility profiles for each system corresponding to the AN type are determined graphically, and the stability constants of the resulting inclusion complexes are calculated. An aqueous solution containing 0.2 % Tween 80 and 0.2 % mannitol was selected as the optimal condition for obtaining the hydroxypropyl-β-cyclodextrin inclusion complex with diisopropylphenol.

New insights into the effect of pH on the mechanism of ofloxacin electrochemical detection in aqueous solution

2019 ◽  
Vol 21 (29) ◽  
pp. 16282-16287 ◽  
Author(s):  
Ting Liu ◽  
Qiang Xue ◽  
Jianbo Jia ◽  
Fei Liu ◽  
Shengzhang Zou ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Detection ◽  
Practical Application ◽  
Effect Of Ph ◽  
Optimal Ph

We first found that identifying the protonation status and polarity of the target pollutant helped to rapidly find an optimal pH condition for its electrochemical detection, which promoted practical application.

THE DISSOCIATION OF α- AND β-LIPOVITELLIN IN AQUEOUS SOLUTION: PART I. EFFECT OF pH, TEMPERATURE, AND OTHER FACTORS

1962 ◽  
Vol 40 (3) ◽  
pp. 363-372 ◽  
Author(s):  
R. W. Burley ◽  
W. H. Cook
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Aqueous Solutions ◽  
Thermodynamic Data ◽  
Equilibrium Constants ◽  
Effect Of Ph ◽  
Reversible Dissociation ◽  
Lipoprotein Concentration ◽  
Irreversible Aggregation ◽  
Increasing Temperature

The effect of pH, temperature, ionic strength, and lipoprotein concentration on the reversible dissociation of α- and β-lipovitellin in aqueous solutions above pH 6 has been examined by ultracentrifugal measurements. Under otherwise similar conditions α- and β-lipovitellin are 50% dissociated at pH 10.5 and 7.8, respectively. Both lipovitellins undergo an irreversible aggregation above about pH 11; β-lipovitellin is sometimes converted to a non-dissociable form upon aging. Dissociation of both lipovitellins decreases with increasing ionic strength and increasing temperature. Although the ultracentrifugal method has limitations, provisional equilibrium constants and thermodynamic data were obtained from it that are comparable with those obtained for certain protein systems.

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