Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Bacterial Contaminants"”.
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Controlling bacterial contaminants in sugarcane ethanol fermentations
… from the feedstock and environment are important bacterial contaminants. Further studies focused on process optimization and validated the use of antibiotics and acid treatment to reduce ethanol losses due to bacterial contamination. Monensin, penicillin and virginiamycin have been shown to reduce …
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Biological Strategies and Mathematical Approaches for Limiting Bacterial Contaminants and Chemical pollutants In Bioethanol Fermentations
<p>During the most recent decades increased interest in fuel from biomass in the United States and worldwide has emerged each time petroleum derived-gasoline registered well publicized spikes in price. The willingness of the U.S. government to face the issues of more heavily high-priced foreign oil …
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Engineering antimicrobial strains of saccharomyces cerevisiae as industrial platform for non-sterile bioprocesses
… especially during the fermentation stage. Bacterial contaminants compete with yeast for fermentable sugars and nutrients, which obstructs starch to ethanol conversion. This leads to a reduction in ethanol yield. At large production scales, prior sterilization of the feedstocks is …
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A Comparative Study of Two Methods of Obtaining Midstream Urine Specimens
… cent more often, (2) contained less than 10,000 bacterial contaminants per milliliter of urine nine per cent more often, (3) contained 10,000 to 100,000 bacterial contaminants per milliliter of urine forty-one per cent less often, (4) had a maximum contamination of 25,000, as compared with over …
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Investigations of achromobacter xylosoxidans and ralstonia pickettii in porcine semen extension systems
… motility and potential reproductive capacity. Bacterial contamination in porcine semen is a widespread problem in semen collection facilities and routinely testing is essential to determine which organisms are present and the effectiveness of the antimicrobial in the semen diluents (extender). …
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Formation of Bacterial Biofilms on Spiral Wound Reverse Osmosis Whey Concentration Membranes
… In addition to the deposition of organic matter, bacterial biofilms may also act as membrane fouling agents. The present investigation was conducted to study the development of bacterial biofilms on spiral wound, reverse osmosis (RO) whey concentration membranes employing both cultural and …
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In vitro model development for novel prevention measures against foodborne pathogens
… to answer questions of the interaction between bacterial contaminants, antimicrobial measures, and their food environment. As described in Chapter 3, we initially validated the model by assessing the antilisterial efficacy of the food-grade bacteriocin nisin, as well as ferulic acid. Both …