Interaction of poly(L-glutamic acid) with cationic surfactants carrying different head groups

1988 ◽  
Vol 266 (3) ◽  
pp. 248-253 ◽  
Author(s):  
H. Maeda ◽  
K. Fujio ◽  
S. Ikeda
Keyword(s):  
Glutamic Acid ◽  
Cationic Surfactants ◽  
Head Groups

Micellization Behaviour of Cationic Surfactants in the Presence of Food Additives: Conductance and Spectroscopic Investigations

2020 ◽  
Vol 10 ◽  
Author(s):  
Sonika Arti ◽  
Neha Aggarwal
Keyword(s):  
Glutamic Acid ◽  
Cationic Surfactants ◽  
Hydrophobic Interactions ◽  
Food Additives ◽  
Specific Conductance ◽  
Food Additive ◽  
Nmr Studies ◽  
Degree Of Ionization ◽  
Increase With Increase ◽  
Micellization Process

Aim: The micellization behavior of cationic surfactants have been studied in the presence of food additives. Objectives: Micellization behaviour of cationic surfactants, cetyltrimethylammonium bromide (CTAB) and tetradecyltrimethylammonium bromide (TTAB) has been studied in water and in various concentrations of salts (food additives) L-glutamic acid, sodium propionate, sodium citrate tribasic dihydrate and disodium tartrate dihydrate at (298.15, 308.15 and 318.15) K. Methods: Two methods used in the present study are specific conductance measurements and spectroscopy (NMR) studies. Results: From the specific conductance(κ), various parameters such as critical micelle concentration (CMC), degree of ionization of micelle (α), standard Gibbs free energy (ΔGom), enthalpy (ΔHom), and entropy (ΔSom) of micellization have also been calculated. Thermodynamic parameters related to the micellization process were also analyzed through NMR studies. Conclusion: The CMC values are influenced by the presence of food additive. The magnitude of CMC values increase with increase in concentration of food additive. In all the cases, enthalpy of micellization, ∆Hom values are found to be negative whereas entropy of micellization, ∆S om values are positive which indicate that hydrophobic interactions play a major role in the micellization process. Also, NMR studies reveal that tartrate and citrate are more hydrated than glutamic acid and propionate, resulting in more downfield shift.

scholarly journals The effect of surfactant structure on ribonuclease A–surfactant interactions

1973 ◽  
Vol 135 (3) ◽  
pp. 547-549 ◽  
Author(s):  
Cecilia Blinkhorn ◽  
Malcolm N. Jones
Keyword(s):  
Anionic Surfactant ◽  
Cationic Surfactants ◽  
Ribonuclease A ◽  
Enzymic Activity ◽  
Head Groups ◽  
Surfactant Interactions ◽  
Dodecylamine Hydrochloride

The enzymic activity of ribonuclease A was measured in the presence of several surfactants at pH7.2. Cationic surfactants with trimethylammonium and pyridinium head groups do not deactivate or denature the enzyme, whereas n-dodecylamine hydrochloride, like the anionic surfactant sodium n-dodecyl sulphate, deactivates and denatures ribonuclease A.

Comb-Like Ionic Complexes of Cationic Surfactants with Bacterial Poly(γ -glutamic acid) of Racemic Composition

2005 ◽  
Vol 5 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Monserrat García-Alvarez ◽  
José Alvarez ◽  
Abdelilah Alla ◽  
Antxon Martínez de Ilarduya ◽  
Concepción Herranz ◽  
...  
Keyword(s):  
Glutamic Acid ◽  
Cationic Surfactants ◽  
Ionic Complexes

Mixtures of anionic and cationic surfactants with single and twin head groups: Solubilization and adsolubilization of styrene and ethylcyclohexane

2006 ◽  
Vol 9 (1) ◽  
pp. 29-37 ◽  
Author(s):  
A. Fuangswasdi ◽  
A. Charoensaeng ◽  
D. A. Sabatini ◽  
J. F. Scamehorn ◽  
E. J. Acosta ◽  
...  
Keyword(s):  
Cationic Surfactants ◽  
Head Groups ◽  
Anionic And Cationic Surfactants

Contrasting effect of 1-butanol and 1, 4-butanediol on the triggered micellar self-assemblies of C16-type cationic surfactants

2021 ◽  
Author(s):  
Vinod Kumar ◽  
Rajni Verma ◽  
Dwarkesh Satodia ◽  
Debes Ray ◽  
Ketan Kuperkar ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Cetylpyridinium Bromide ◽  
Quaternary Salts ◽  
Head Groups ◽  
Contrasting Effect ◽  
Cetyltrimethylammonium Tosylate

Self-assembly in aqueous solutions of three quaternary salts based C16-type cationic surfactant with different polar head groups and identical carbon alkyl chain viz., cetylpyridinium bromide (CPB), cetyltrimethylammonium tosylate (CTAT), and...

Mixtures of anionic and cationic surfactants with single and twin head groups: Adsorption and precipitation studies

2006 ◽  
Vol 9 (1) ◽  
pp. 21-28 ◽  
Author(s):  
A. Fuangswasdi ◽  
A. Charoensaeng ◽  
D. A. Sabatini ◽  
J. F. Scamehorn ◽  
E. J. Acosta ◽  
...  
Keyword(s):  
Cationic Surfactants ◽  
Head Groups ◽  
Anionic And Cationic Surfactants
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