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 20 for “"leafy greens"”.
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Mechanical harvesting of leafy greens on small farms
… small farms. The harvesting practices for salad greens from small farms is just one example of this disconnect. This thesis is a historical and design study of mechanical salad green harvesters for small farms. The designs consist of a frame with power, cutting and collection systems mounted to …
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Enhancing microbial food safety of fresh leafy greens by technology innovations and AI tools
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Improving preharvest sampling for pathogens in leafy greens through simulations and development of alternative approaches
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Growth probability of Escherichia coli O157:H7 and Listeria monocytogenes in packaged fresh-cut romaine mix at fluctuating temperatures during simulated transport, retail storage and display
… during commercial transport and retail sale of leafy greens negatively impacts both microbial safety and product quality. Consequently, the effect of fluctuating temperatures on Escherichia coli O157:H7 and Listeria monocytogenes growth in commercially bagged salad greens was assessed during …
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Effect of Electrostatic Spraying of Food-Grade Organic and Inorganic Acids, and Grape Seed Extract on Salmonella Typhimurium and Escherichia coli O157:H7 on Spinach and Iceberg Lettuce
… strategies do not completely decontaminate leafy greens such as spinach and iceberg lettuce. Therefore, more effective treatments are essential to ensure the microbial safety of the produce at the selling point. Here, a multiple hurdle approach was applied: (1) Natural antimicrobials - …
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A comparative study of conventional greens washers and a prototype system recycling wash water with a mathematical model of grit concentration in wash water
… in the food processing industry. A conventional leafy-greens washer at the Exmore Foods Company, Incorporated, Exmore, Virginia, was compared with a prototype system. Spinach and turnip greens were processed with the two systems. The quality of the product and that of the wash water from both …
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Influence of Kaempferol on Noncanonical DNA Structures and Protein Aggregation
… a naturally occurring plant flavonoid found in leafy greens such as watercress, kale, and broccoli. Interestingly, KMP has been shown to exhibit anticancer properties by interfering with various cell signaling pathways. Moreover, KMP has been shown to exhibit neuroprotective properties and …
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Effects of Food Safety Events on U.S. Romaine Lettuce Prices
Romaine lettuce and leafy greens have been at the center of food safety concerns over the last several years. More specifically, romaine lettuce has been directly linked to seven(7) foodborne illness outbreaks and resulted in five(5) recalls over the eight(8) years period of January 1, 2012, to …
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Nutritional and Bioactive Characterisation of Faba Bean (Vicia faba L.) Green Shoots as a Protein-Rich Leafy Vegetable
… Prairies, where the availability of fresh green leafy vegetables is limited outside the summer season. This thesis provides a comprehensive nutritional and biochemical characterisation of faba bean shoots (Vicia faba L.), hereafter referred to as faba greens, to investigate their potential as a …
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Investigating behaviors of zoonotic and human pathogens on plants
… of avian pathogenic E. coli (APEC) to persist on leafy greens indicating enhanced environmental fitness in these isolates and potential risks to human health. Outbreaks associated with food crops continue to occur and it is clear that different approaches are critical to enhance the safety of …
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Identification and Optimization of the Antagonistic Potential of Native Spinach Microbiota towards Escherichia coli O157:H7
Leafy greens such as spinach have been the object of several recent food-borne pathogen outbreaks. The purpose of this study was to isolate bacteria spinach epiphytic bacteria that inhibit growth of E. coli O157:H7, which we describe as antagonism. The mechanism of antagonism was investigated and …
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An Analysis of Current Standard Operating Procedures for Fresh and Fresh-Cut Produce in Retail Foodservice Operations
… in foodborne illness outbreaks associated with leafy greens due in part to the increased consumption of raw produce and the fact that pathogenic microorganisms are not killed due to the lack of a kill step such as cooking. The foodservice industry has worked with regulatory agencies diligently …
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Survival of Escherichia coli O157:H7 on cut and whole surfaces of spinach and leaf lettuce, packaged under modified atmospheric conditions
… of Escherichia coli O157:H7 have been linked to leafy greens in recent years. An overwhelming amount of lettuce and spinach on the market is sold in modified atmosphere packaging as ready to eat salad mixes. The objectives of this study were to determine the effects of modified atmosphere, …
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Investigating the effect of mutations in lipopolysaccharides (LPS) (O-antigen and Core region) of Salmonella Typhimurium on the colonisation of “microgreens”
… illnesses linked to the consumption of raw leafy greens, particularly microgreens, have significantly increased. Salmonella Typhimurium, a common foodborne pathogen, has been implicated in several outbreaks, underscoring the importance of understanding its interactions with fresh produce. …
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Molecular Characterization of Spinach (Spinacia Oleracea) Microbial Community Structure and its Interaction With Escherichia coli O157:H7 in Modified Atmosphere Conditions
Leafy greens like lettuce and spinach are a common vehicle for foodborne illness in United States. It is unknown if native plant epiphytic bacteria may play a role in the establishment of enteric pathogens on leaf surfaces. The objective of this study was to characterize the bacterial communities …
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Identification of food safety risks at Virginia farmers' markets and development of a food safety plan to help farmers market managers
… bacteria was isolated from farmers' market leafy greens, onions and tomatoes when compared to a retail grocery store (P=0.0011, P=0.0395, and P<0.0001, respectively). Additionally, one or more target pathogen was isolated from 28 farmers' market samples and 16 retail grocery store samples. …
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Farm-to-table food safety for Colorado produce crops: a web-based approach for promoting good agricultural and handling practices
… specialty crops: apples, berries, broccoli, leafy greens, melons, peaches, peppers, potatoes, squash, and tomatoes. The approach of developing technology-based training modules and educational materials allowed for improved accessibility to growers and produce consumers across the state while …
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Explore the utilization and nutrition of mungbean [Vigna radiata] for human consumption to promote in Senegal and Virginia
… The potential for mungbean to be harvested as a leafy green as well as a pulse could allow for a more balanced and nutrient-rich diet. This diversification could help combat micronutrient deficiencies while earlier harvest of the leaves could help alleviate the pressures of the "hunger season." …
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Aggregative swab sampling method for romaine lettuce show similar quality indicators and microbial profiles compared to composite tissue samples in a pilot study
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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The potential role of Vertical Plant Farms in contributing to the environmental sustainability and security of the global food system
… fresh crops such as salad leaves and microgreens. These crops have short life cycles, high commodity values and low energy density, key factors which make them the most viable crops for VPF cultivation. Capital costs, energy density and the resulting carbon intensity and production costs …