Abstract:
A process for measuring total microbiological content in an aqueous medium includes adding a fluorescent dye to the aqueous medium, measuring the fluorescent signal in the aqueous medium to obtain a baseline fluorescent signal, releasing intracellular content of the microbiological matter into the aqueous medium by Iysing the microbiological matter, measuring the fluorescent signal in the aqueous medium with the released intracellular content of the microbiological matter to obtain a second fluorescent signal, subtracting the baseline signal from the second fluorescent signal to obtain a net fluorescent signal and equating the net fluorescent signal with a microbiological content. Systems for measuring total microbiological content and methods for measuring biofilm and adjusting for background noise are also provided.
Abstract:
Disclosed is a method of preparing a catalyst and a resultant coated substrate. An example method for preparing a catalyst includes dissolving a precursor salt in water to create a dissolved precursor salt. In addition, the method includes adding an ultra-violet sensitizer to the dissolved precursor salt to create a photo emulsion and mixing the photo emulsion with at least one of a surfactant or a stabilizer to create a modified photo emulsion. Further, the modified photo emulsion is applied to a substrate to create a coated substrate, and then the coated substrate is exposed to ultra-violet light. Further, the example method comprises washing the coated substrate after exposing the coated substrate to ultra-violet light and drying the coated substrate after washing the coated substrate.
Abstract:
A method has been found for the inhibition of microbial biofilm on surfaces in contact with systems, such as aqueous systems. In accordance with the method, an effective amount of a modified starch polymer is fed to the system water. The modified starch polymer may be a cationic quaternary ammonium starch.
Abstract:
A process has been found which increases the efficiency and effectiveness of introducing antimicrobial compounds into complex biofilm matrices through the use of liposome carriers, thereby removing the biofouling in industrial water bearing systems, including piping, heat exchanges, condensers, filtration systems and fluid storage tanks. According to one embodiment of the invention, antimicrobial compound containing liposomes are added to water systems prone to biofouling and biofilm formation. The liposomes, being similar in composition to microbial membranes or cells, are readily incorporated into the existing biofilm. Once the antimicrobial compound containing liposomes become entrained with the biofilm matrix, the decomposition or programmed disintegration of the liposome proceeds. Thereafter, the biocidal aqueous core is released to react directly with the biofilm encased microorganisms. Upon the death of the organisms, the polysaccharide/protein matrix decomposes and thereby results in reduced fouling of the water bearing system, resulting in increased heat transfer, increased flux, less deposit of colloidal and particulate solids and dissolved organics on the surface of the microfiltration membrane, thereby reducing the frequency and duration of the membrane cleaning and ultimate replacement.
Abstract:
A method has been found for the removal of microbial biofilm on surfaces in contact with systems, including but not limited to aqueous systems, which comprises adding to the aqueous system an effective amount of a polyalkyleneoxide polysiloxane surfactant to substantially remove microbial biofilm, from surfaces in aquatic systems, while presenting minimal danger to non-target aquatic organisms at discharge due to their very low discharge concentrations.
Abstract:
The invention relates to a method of producing an item comprising providing a substrate, treating at least a surface section of said substrate by applying at least one primer layer, the total thickness of the at least one primer layer being up to 200 nm; and overmolding an elastomer onto and/or into the primer treated substrate. The item produced according to the invention comprises a very strong interfacial bonding between the substrate and the overmolded layer. The substrate and the elastomer form a very strong and durable bonding to each other, even when the materials differs in hardness and/or stiffness. The method can be used with silicone as overmolded elastomer.
Abstract:
An improved stabilized biocidal delivery system has been found which increases the efficiency and effectiveness of introducing antimicrobial compounds into complex bio-film matrices through the use of liposome emulsion in an ethoxylated compound, thereby removing the bio-fouling in industrial water bearing systems, including piping, heat exchangers, condensers, filtration systems and fluid storage tanks. The liposome emulsion is comprised of a vesicle encapsulated biocide that is stabilized against chemical and heat degradation over longer periods of time than previously possible through the incorporation of one or more stabilizer compounds.
Abstract:
A method has been found for the inhibition of microbial biofilm on surfaces in contact with systems, such as aqueous systems. In accordance with the method, an effective amount of a modified starch polymer is fed to the system water. The modified starch polymer may be a cationic quaternary ammonium starch.
Abstract:
A method has been found for the inhibition of microbial biofilm on surfaces in contact with systems, such as aqueous systems. In accordance with the method, an effective amount of a modified tannin biofilm control agent is fed to the system water. The modified tannin biofilm control agent comprises a reaction product of an amine, an aldehyde and tannin and provides a good environmental profile.
Abstract:
A method has been found for the removal of microbial biofilm on surfaces in contact with systems, including but not limited to aqueous systems, which comprises adding to the aqueous system an effective amount of a polyethyleneimine surfactant to substantially remove microbial biofilm, from surfaces in aquatic systems, while presenting minimal danger to non-target aquatic organisms at discharge due to their very low discharge concentrations.