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 20 of 52 for “"Food samples"”.
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Investigation of methods for logging and recording the temperature of food samples submitted for microbiological analysis
… results from the microbiological examination of foods is affected by the quality of the sample taken and the provision of effective transport systems which prevent temperature deterioration of the samples during transit. This project has investigated and evaluated the factors which affect …
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Analysis of antibiotics and PFAS as potential emerging pollutants in the water bodies and their accumulation in food samples
… Their detection in drinking water and food is one of the global concerns. Their effect in living organisms have been widely documented ranging from allergic reaction to carcinogenic effect, and in serious situations they can lead to death. In this project, the background review on the …
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Sample preparation methods and molecular based detection for the rapid isolation and identification of Listeria monocytogenes in food samples
… bacterium responsible for listeriosis, a food-borne disease, which may result in severe illness and possible death. The importance of L. monocytogenes as a food-borne pathogen has been recognized since the 1980's when a correlation between the cunsumption of contaminated foodstuffs and …
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Optimizing Immersive Technology Condition for Measuring Consumer Perception and Acceptance of Food Products
… by enabling consumers to experience tasting of food samples in different environments, thus generating more realistic perception. However, little attention has been paid to developing a standardized and optimized methodology for conducting such sensory testing in an immersive environment. A …
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Investigation of ethnic food safety : microbiological and consumer behavioral approaches
… become popular in the United States, more foodborne illnesses associated with ethnic cuisine have been observed by food safety professionals. Relatively few studies/researches have been devoted to ethnic cuisines. This study aims to explore ethnic food safety by considering microbiological …
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Effect of transport methods on recovery of bacteria from ground beef samples
… methods presently used to transport perishable food samples intended for microbiological analysis is presented. A transport system using an appropriate, pre-chilled container with dry ice as the temperature contro11ant resulted in a significant1y higher (P ~ 0.01) survival rate of Clostridium …
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Development of a novel carbohydrate-based method for the detection of norovirus from ready-to-eat foods
… of norovirus are often linked to contaminated food or water. Ready-to-eat foods are particularly prone to contamination, since they often require handling during preparation and are not usually heated before serving. Norovirus capsids have been shown to interact specifically with histo-blood …
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Sample Preparation/Concentration for Trace Analysis in GC/MS (A study of solid phase microextraction and headspace sampling)
… ®, Veltol Plus® and short chain fatty acids in food samples were analyzed by GC/MS. Since SPME is not directly applicable to solid samples, SPME associated with MAE techniques was studied for solids, primarily food samples. The efficiency of classical solvent extraction and MAE was compared. The …
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Analysis of Fats and Fat-Soluble Components in Foods Using Supercritical Fluid Extraction and Chromatographic Techniques
… for the extraction of fats from common foods using SFE and to determine by chromatographic techniques the fat-soluble components that are extracted with the fats. In this study various food samples were examined including french fries from Wendy's, McDonald's and Burger King, as well as …
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Detection of campyloabacter jejuni and campylobacter coli in high risk foods and environmental waters using the polymerase chain reaction
… for the detection of Campylobacter species in foods and environmental waters. A novel species-specific PCR was adapted into a high-throughput, colorimetric end-stage detection format (PCR ELISA). The sensitivity of detection of the PCR ELISA assay was equivalent to one genome copy and was …
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Enhanced recovery of injured and noninjured cells of Bifidobacterium species from water and dairy products
… (injured and uninjured) present in water and food samples. The objectives of this research were to develop a repair detection (RD) procedure to be used with VPI's anaerobic roll tube apparatus for improving the recovery of Bifidobacterium and to compare this method with existing enumeration …
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Integrated optical fluorescence multi-sensor system
… systems for the rapid assessment of water or food samples. Other areas, such as clinical diagnostics or forensic science also have a demand for highly multiplexed analytical systems. This thesis presents a novel 32-analyte integrated optical fluorescence-based multisensor, and its integration …
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Binding of Steroid Hormones In Vitro by Water-Insoluble Dietary Fiber
… fiber fraction obtained from composite food samples of 18 Seventh-day Adventist (SDA) nonvegetarian (NV), 20 SDA lacto-ovovegetarian (LOV), and 15 SDA vegan (V) men. Three-day dietary food records and 72-hr food composites were obtained contemporaneously from each subject. The LOV and V …
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The Analysis of Flavor Compounds in Green Tea Using Ice Concentration Linked with Extractive Stirrer (Icecles)
<p>Sample preparation of target components from food samples is one of the most difficult steps in this type of analysis. Many extraction techniques have been used for this purpose, such as liquid-liquid extraction (LLE), accelerated solvent extraction (ASE), microwave-assisted extraction (MAE), …
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CRISPR-integrated Biosensors for Human Health: Novel strategies for pathogen detection and cancer screening
… health, guiding clinical decisions, and ensuring food safety. CRISPR-based biosensors offer a promising solution due to their programmability, sensitivity, and versatility. This dissertation focuses on the development of CRISPR-integrated biosensing platforms for assessing antimicrobial …
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High resolution meltcurve PCR assay for detection of salmonella and escherichia coli O157:H7 in foods
Foodborne illnesses associated with Salmonella and Escherichia coli O157:H7 have become world-wide public-health problems. Conventional methods for the identification of foodborne pathogens are tedious, expensive, and time-consuming. Alternatively, real-time PCR (RT-PCR) as a promising method to …
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Similaridade genotípica de Salmonella enterica isolada de animais silvestres e exóticos em cativeiro em Ohio, EUA
… their environment, in Ohio, USA. A total of 319 samples, including feces (n=225), environment (n=56) and food (n=38) were collected from 31 species (common crane, cheetah, raccoon, giraffe, takin, white tailed deer, goral, white and indian rhino, llama, blue sheep, onager, wild dog, oryx, eland, …
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Characterization of Campylobacter, Salmonella, and Diarrheagenic Escherichia Coli from Food, Food Waste and Water in the Chobe Region of Botswana
… children in low- and moderate-income countries. Food, food waste, and water are all vehicles that can promote the spread of diarrheal disease-causing bacteria like Campylobacter, Salmonella enterica, and E. coli. Resistance to commonly used antibiotics is on the rise, making them difficult to …
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Approaching the Complexity of Biological Specimen: New Mass Spectrometry Concepts in Ambient Ionization and Proteomics
… are utilized to explore new concepts in food samples. First, a proof-of-concept is carried out with the liquid micro-junction surface sampling probe (LMJ-SSP), a liquid extraction-based ambient ionization probe, by replacing the tip with a 21-gauge needle. This creates the …
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