To determine whether some bacteria are more susceptible
than others to quaternary ammonium compounds, the following bacteria
were grown on agar slants containing various concentrations of
alkyl dimethyl ethyl benzyl ammonium chloride (ADEBAC), and alkyl
dimethyl benzyl ammonium chloride (ADBAC): Aerobacter aerogenes
12658, Alcaligenes metalcaligenes, Brevibacterium linens, Chromobacterium
lividum, Escherichia...
Quaternary Ammonium Compounds, Qams, are an important class of
chemicals which present interesting challenges to analysts. This thesis
reports results of investigations on uses of ion-pairing techniques for
separations and detection of Qams. Special apparatus for post-column
solvent extraction of liquid chromatographic eluates was developed as
part of this work....
Inflorescence necrosis (IN) is a recently described disorder in grapes
characterized by partial or complete deterioration of the pedicel and rachis near
bloom. Elevated levels of ammonium in the rachis are associated with the
incidence of IN and hypothesized as the cause of the disorder. An incubation
system with single-node...
The work presented in this thesis is concerned with the
effect of several antibiotics and quaternary ammonium
sanitizers upon growth of lactic acid bacteria. Section I
reports the purification of beta-lactamase from Lactococcus
cremoris PR-108, by ion exchange chromatography, using the
chromogenic substrate pyridine-2-azo-p-dimethylaniline
(PADAC) as the enzymatic indicator. Section...