PromotingSynechocystissp. PCC 6803 Harvesting by Cationic Surfactants: Alkyl-Chain Length and Dose Control for the Release of Extracellular Polymeric Substances and Biomass Aggregation

2018 ◽  
Vol 7 (2) ◽  
pp. 2127-2133 ◽  
Author(s):  
Yun Zhou ◽  
YenJung Sean Lai ◽  
Everett Eustance ◽  
Bruce E. Rittmann
Keyword(s):  
Chain Length ◽  
Cationic Surfactants ◽  
Extracellular Polymeric Substances ◽  
Alkyl Chain ◽  
Alkyl Chain Length ◽  
Dose Control ◽  
Pcc 6803

scholarly journals Influence of surfactant alkyl length in functionalizing sol–gel derived microporous cobalt oxide silica

RSC Advances ◽  
2014 ◽  
Vol 4 (76) ◽  
pp. 40181-40187 ◽  
Author(s):  
Gianni Olguin ◽  
Christelle Yacou ◽  
Simon Smart ◽  
João C. Diniz da Costa
Keyword(s):  
Cobalt Oxide ◽  
Chain Length ◽  
Oxidation State ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Sol Gel ◽  
Alkyl Chain Length ◽  
Pore Morphology ◽  
Silica Materials ◽  
Alkyl Length

The size or alkyl chain length of cationic surfactants can be used to tailor both the pore morphology and the functionality or oxidation state of cobalt in silica materials.

The effect of alkyl chain length of a polysoap on the surface activity of its complexes with cationic surfactants

1997 ◽  
Vol 7 (4) ◽  
pp. 149-151 ◽  
Author(s):  
Valery G. Babak ◽  
Marguerite Rinaudo ◽  
Jacques Desbrières ◽  
Galina A. Vikhoreva ◽  
Marie-Caroline Michalski
Keyword(s):  
Chain Length ◽  
Surface Activity ◽  
Cationic Surfactants ◽  
Alkyl Chain ◽  
Alkyl Chain Length

scholarly journals Silver Nanoparticles Stabilized with Phosphorus-Containing Heterocyclic Surfactants: Synthesis, Physico-Chemical Properties, and Biological Activity Determination

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1883
Author(s):  
Martin Pisárčik ◽  
Miloš Lukáč ◽  
Josef Jampílek ◽  
František Bilka ◽  
Andrea Bilková ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Biological Activity ◽  
Zeta Potential ◽  
Chain Length ◽  
Alkyl Chain ◽  
Chemical Properties ◽  
Alkyl Chain Length ◽  
Microbial Pathogens ◽  
Physico Chemical ◽  
Phosphorus Containing

Phosphorus-containing heterocyclic cationic surfactants alkyldimethylphenylphospholium bromides with the alkyl chain length 14 to 18 carbon atoms were used for the stabilization of silver nanodispersions. Zeta potential of silver nanodispersions ranges from +35 to +70 mV, which indicates the formation of stable silver nanoparticles (AgNPs). Long-chain heptadecyl and octadecyl homologs of the surfactants series provided the most intensive stabilizing effect to AgNPs, resulting in high positive zeta potential values and smaller diameter of AgNPs in the range 50–60 nm. A comparison with non-heterocyclic alkyltrimethylphosphonium surfactants of the same alkyl chain length showed better stability and more positive zeta potential values for silver nanodispersions stabilized with heterocyclic phospholium surfactants. Investigations of biological activity of phospholium-capped AgNPs are represented by the studies of antimicrobial activity and cytotoxicity. While cytotoxicity results revealed an increased level of HepG2 cell growth inhibition as compared with the cytotoxicity level of silver-free surfactant solutions, no enhanced antimicrobial action of phospholium-capped AgNPs against microbial pathogens was observed. The comparison of cytotoxicity of AgNPs stabilized with various non-heterocyclic ammonium and phosphonium surfactants shows that AgNPs capped with heterocyclic alkyldimethylphenylphospholium and non-heterocyclic triphenyl-substituted phosphonium surfactants have the highest cytotoxicity among silver nanodispersions stabilized by the series of ammonium and phosphonium surfactants.

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