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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 20 of 38 for “"heat resistance"”.
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Studies on the Heat Resistance of Bacterial Spores
Made available in DSpace on 2014-12-05T21:45:21Z (GMT). No. of bitstreams: 1 0004463.pdf: 4614582 bytes, checksum: 42435733733b1131e8474258c7ded7d9 (MD5) Previous issue date: 1952
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Factors Affecting the Heat Resistance of Clostridium perfringens Spores
… plays an important role in this infection. The heat resistance of the spore allows the organism to survive the cooking process, grow in the cooling food, and infect the victim. Despite the occurrence of this disease and the importance of the spore to this process, little work has been performed …
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Effects of chemical treatments on the heat resistance of Bacillus coagulans 43P spores
Thesis (M.S.)--Michigan State University. Dept. of Food Science and Human Nutrition,
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Increase in heat resistance of <u>Listeria monocytogenes</u> Scott A by sublethal heat shock
… cells of Listeria monocytogenes Scott A were heat shocked in Trypticase Soy + 0.6% Yeast Extract broth at 40, 44, and 45°C for 3, 10 and 20 min at each temperature, followed by heating at 55â C for 50 minutes in order to determine an optimum heat shock response. Most heat shock temperatures …
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Heat resistance of Salmonella typhimurium and Listeria monocytogenes in suspension and in a biofilm matrix
The heat resistance was determined for Salmonella typhimurium and Listeria monocytogenes Scott A suspended in 2% UHT processed milk and in a biofilm matrix. Pure cultures at an initial concentration of 10⁵ / ml were used. Heat resistance was determined by two methods. One method was sealed …
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A Role of Intracellular Polysaccharide in the Sporulation of "Bacillus Cereus"
… with exogenous glucose were determined by the heat resistance of spores in both mutant and wild type. Dipicolinic acid levels in spores were assayed with modified Janssen reagent. Findings. A mutant of "Bacillus cereus" strain T isolated was deficient in the ability to accumulate intracellular …
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Novel PLA-based materials with improved thermomechanical properties and processability through control of morphology and stereochemistry. A study in improving toughness and processability of PLA by blending with biodegradable polymers and the two PLA enantiomers PLLA and PDLA to accelerate crystallinity and heat resistance
… containing 10% of each additive. To increase heat resistance of PLA, the material’s crystallinity has to be increased. However PLA has a relatively slow crystallisation rate making it difficult and expensive to be used in commercial applications where heat resistance is needed. For this reason …
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Use of the Gompertz equation to model non-linear survival curves and predict temperature, pH, and sodium chloride effects for Listeria monocytogenes Scott A
… cells vs. time, for bacteria exposed to heat have been reported. Factors which may affect the shape of a survival curve and the heat resistance of bacteria include temperature, pH, and NaCl concentration. Many studies have examined the effect of these factors individually, but little …
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An Intracellular Polysaccharide that Serves as a Carbon and Energy Source for Sporulation in "Bacillus Cereus" Strain T
… (PHB) accumulation and degradation, spore heat resistance, and the ability to sporulate endotrophically. Findings. The mutant strain (CH-5) demonstrated growth characteristics almost identical to those of the wild-type strain (T). Polysaccharide and PHB accumulation were very similar in …
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Synthesis, characterization, and evaluation of a heat stabilizing siloxane
<p>Siloxanes, renowned for their heat resistance and release properties, are prone to oxidize above 200°C. The goal herein is to increase siloxane bath life used in fuser roll applications at temperatures above 200°C, yielding faster production, less waste, and cost savings by keeping the bath …
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Impact of strain variability on the risk presented to chilled foods by non-proteolytic clostridium botulinum
… microbial risk assessment for minimally heated chilled foods by including information on variability of non-proteolytic Clostridium botulinum at strain level. The research on strain variability covers practical experiments as well as literature surveys and focuses on heat resistance …
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Technological processes study for high value health ingredients and foods production
… carried out to determine the antioxidative and heat resistance properties of a new antioxidant (EVS-OL) when used for high temperature frying such as is typically employed for the preparation of french fries. Results of the scientific research have been submitted for a publication and some data …
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Effects of heat and acid stress on bacterial populations of beef, and on susceptible and multi-antimicrobial resistant Salmonella isolated from beef
… hides and carcasses, and whether antimicrobial resistance provided cross-protection against low-pH or heat stress. Results of studies evaluating methods to improve microbiological quality of chilled beef carcasses, subprimal cuts, and fabrication table surfaces, suggested reduced antimicrobial …
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Lifetime Testing of Wire-Grid Polarizers with Selected Over-Coatings
… extinction, durability, angle of incidence, and heat resistance when compared to traditional organic polarizers. WGPs are found in applications such as high lumen lighting, laser devices, high lumen digital cinema projectors, LED packaging, and other integrated optical applications and are …
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Studies on Clostridium acetobutylicum P262 : sporulation induction and analysis of an oligosporogenous, solvent-deficient mutant
… at low pH values under certain conditions. The heat resistance of mature spores was determined and the optlmal temperature for spore quantification was shown to be 75·C. acetobutylicum mutants m5 06 were by transposon mutagenesis using the conjugative transposon Tn925::Tn917, not transposon …
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A technical and marketing analysis of nanocrystalline Ni-W coating for oil and gas industry applications
… including excellent corrosion, wear, and heat resistance in addition to being health and environmentally friendly. At a competitive price along with an efficient coating process, it is anticipated that this coating technology will have high impact on the functional coating industry. This …
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High fracture toughness and high modules silicone resins
… They have superior thermal stability, heat resistance, fire resistance, and still can be easily processed. Silicone resins recently have attracted much interest as low dielectric constant materials replacing silicon dioxide as interlevel dielectrics. Unfortunately, poor mechanical …
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A study on thermal conductivity of six unexplored Nigerian clays for possible refractory and insulating materials
… mineral and chemical based materials, with high heat resistance properties. Refractory manufacturing typically uses clay as the main raw material. The study aims to investigate six unexplored Nigerian clay based on the suitability of their chemical, physical, mechanical and thermal properties as …
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