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Experimental Study of the Influence of Ar/H 2 Microwave Discharges on Lipid A
Author(s) -
Kylián Ondřej,
Hasiwa Marina,
Gilliland Douglas,
Rossi François
Publication year - 2008
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.200700093
Subject(s) - microwave , human decontamination , chemistry , analytical chemistry (journal) , materials science , organic chemistry , waste management , physics , quantum mechanics , engineering
This paper discusses the influence of microwave discharge plasmas on Lipid A, one of the most problematic compounds from the point of view of conventional decontamination methods. The effect of microwave discharges produced in different Ar/H 2 mixtures on Lipid A films has been studied by means of both biological tests and materials characterisation methods (FT‐IR and ToF‐SIMS spectroscopy) in order to identify the main mechanisms leading to the suppression of their pyrogenicity. From the results obtained, it is concluded that most probably chemical modifications, namely the removal of long carboxylic acid chains and mineralisation of the organo‐phosphate group, are responsible for Lipid A depyrogenation.