Interactions of some amino acids and glycine peptides with aqueous sodium dodecyl sulfate and cetyltrimethylammonium bromide at T=298.15 K: a volumetric approach

2004 ◽  
Vol 36 (1) ◽  
pp. 7-16 ◽  
Author(s):  
Sreelekha K. Singh ◽  
Agnita Kundu ◽  
Nand Kishore
Keyword(s):  
Amino Acids ◽  
Sodium Dodecyl Sulfate ◽  
Cetyltrimethylammonium Bromide ◽  
Sodium Dodecyl ◽  
Aqueous Sodium ◽  
Dodecyl Sulfate ◽  
Glycine Peptides

scholarly journals Eight Gram-negative bacteria are 10 000 times more sensitive to cationic detergents than to anionic detergents

2003 ◽  
Vol 49 (12) ◽  
pp. 775-779 ◽  
Author(s):  
Soumitra Rajagopal ◽  
Nicole Eis ◽  
Kenneth W Nickerson
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Cetyltrimethylammonium Bromide ◽  
Liquid Culture ◽  
Sodium Dodecyl ◽  
Homoserine Lactone ◽  
Luria Bertani ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Cationic Detergents ◽  
Dodecyl Sulfate

In liquid culture, eight typical Gram-negative bacteria were ca. 10 000-fold more sensitive to cationic detergents than to the anionic detergent sodium dodecyl sulfate. Cetyltrimethylammonium bromide (CTAB) was inhibitory at concentrations ranging from 0.0006% to 0.01%. Four pseudomonads able to form biofilms were ca. 1000-fold more resistant to CTAB on Luria–Bertani agar plates than they were in liquid culture. A lasI mutant of Pseudomonas aerugi nosa was only able to tolerate 0.1% CTAB on Luria–Bertani agar plates but could tolerate 5% CTAB when supplemented with homoserine lactone containing culture supernatants.Key words: sodium dodecyl sulfate, cetyltrimethylammonium bromide, bacterial detergent resistance, homoserine lactones, Pseudomonas biofilms.

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