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Formation Of Bioactive-Carrier Hollow Solid Lipid Micro- And Nanoparticles, Junsi Yang Dec 2016

Formation Of Bioactive-Carrier Hollow Solid Lipid Micro- And Nanoparticles, Junsi Yang

Dissertations, Theses, & Student Research in Food Science and Technology

In recent years, bioactive lipids (e.g., carotenoids, phytosterols, and tocopherols) have attracted a lot of interest to develop health and wellness promoting foods and beverages. However, bioactive lipids are water-insoluble and degrade easily during processing and storage, making their addition into foods and beverages challenging.

The main objective of this thesis was to develop a novel green process to form bioactive lipid-carrier hollow solid lipid micro- and nanoparticles using supercritical carbon dioxide (SC-CO2). Specific objectives were to develop hollow solid lipid micro- and nanoparticles using SC-CO2 technology, and to load the hollow solid lipid micro- and nanoparticles ...


Edible Insects As A Source Of Food Allergens, Lee Palmer Dec 2016

Edible Insects As A Source Of Food Allergens, Lee Palmer

Dissertations, Theses, & Student Research in Food Science and Technology

Increasing global population increasingly limited by resources has spurred interest in novel food sources. Insects may be an alternative food source in the near future, but consideration of insects as a food requires scrutiny due to risk of allergens. Currently, the insect Dactylopius coccus, known as cochineal, is used to produce carmine, a natural red pigment used in food, which has caused allergic reactions. This study investigated allergens of cochineal focusing on purification from the pigment. Mass spectrometry identified a previously described major allergen of cochineal and a tropomyosin, although further work is required.

Tropomyosin is a major cross-reactive allergen ...


Risk Assessment And Research Synthesis Methodologies In Food Safety: Two Effective Tools To Provide Scientific Evidence Into The Decision Making Process., Juan E. Ortuzar Dec 2016

Risk Assessment And Research Synthesis Methodologies In Food Safety: Two Effective Tools To Provide Scientific Evidence Into The Decision Making Process., Juan E. Ortuzar

Dissertations, Theses, & Student Research in Food Science and Technology

The food supply chain is a complex and diverse system. Some food products need minimum processing to reach the consumers, while others involve several different processes, countries and suppliers, can take several months to be on the table of the end consumer. Regarding food safety, the public health of consumers is at stake and the consequences of outbreaks could prove disastrous. This has been recognized as a matter of global importance for the food industry and authorities around the world since several efforts to improve quality, safety and trade of food have arisen since the early 1960s. The birth of ...


Studies On Asparagine In Nebraska Wheat And Other Grains, Sviatoslav Navrotskyi Oct 2016

Studies On Asparagine In Nebraska Wheat And Other Grains, Sviatoslav Navrotskyi

Dissertations, Theses, & Student Research in Food Science and Technology

Understanding of the contribution of environmental and genetic factors on the chemical composition of different grains is a critical issue in the area of food safety of cereal products. Numerous studies have reported that asparagine can form acrylamide, a toxic and potentially carcinogenic precursor compound, during a Milliard reaction. Therefore, studying the environmental and genetic effects that contribute to accumulation of asparagine in wheat and proso millet lines, which were grown in the state of Nebraska, is important for supporting breeding programs aimed at providing safer crops for consumers. In the realm of reduction of the asparagine concentration in wheat-based ...


Matrix Effects On The Detection Of Milk And Peanut Residues By Enzyme-Linked Immunosorbent Assays (Elisa), Abigail S. Burrows Aug 2016

Matrix Effects On The Detection Of Milk And Peanut Residues By Enzyme-Linked Immunosorbent Assays (Elisa), Abigail S. Burrows

Dissertations, Theses, & Student Research in Food Science and Technology

Food matrices are complex systems of lipids, carbohydrates, and proteins in which interactions between matrix components and allergenic proteins are known to have negative effects on the recovery of allergens when analyzed by ELISA. The purpose of this study was to first evaluate the recovery of milk and peanut residues from multiple food matrices and mixes and to secondly evaluate the use of a modified extraction protocol, sequential extractions, on the recovery of milk and peanut allergens.

Pastry dough matrices and pastry dough mixes incurred with milk were prepared at varying concentrations of flour and evaluated for recovery of NFDM ...


From Milpas To The Market: A Study On The Use Of Metal Silos For Safer And Better Storage Of Guatemalan Maize, José Rodrigo Mendoza Jul 2016

From Milpas To The Market: A Study On The Use Of Metal Silos For Safer And Better Storage Of Guatemalan Maize, José Rodrigo Mendoza

Dissertations, Theses, & Student Research in Food Science and Technology

This project aimed to implement the use of metal silos to improve quality and safety of maize consumed by inhabitants of the highlands of Guatemala. This manuscript includes a literature review of the maize production chain in Guatemala, a survey about agricultural practices used in the region of study, as well as a characterization of the analyzed maize regarding its mycoflora, nutritional composition, and insect infestation. To better understand the current situation regarding agricultural practices and maize consumption, a survey was carried out. Sample consisted of 280 families representing 14 rural communities distributed in the townships of Todos Santos and ...


Evaluation Of Qualitative Food Allergen Detection Methods And Cleaning Validation Approaches, Rachel C. Courtney May 2016

Evaluation Of Qualitative Food Allergen Detection Methods And Cleaning Validation Approaches, Rachel C. Courtney

Dissertations, Theses, & Student Research in Food Science and Technology

Allergen control plans are increasingly used by the food industry to prevent allergen cross-contact and validation of these plans involves methods to detect allergen protein residues. A commonly used rapid allergen detection method is lateral flow devices, although research about their validation is lacking. The objective of this research was to investigate lateral flow devices, their specificity and sensitivity to milk proteins and milk-derived ingredients, swabbing conditions, and applications in cleaning validation.

Several lateral flow devices advertised to detect total milk did not detect whey proteins or whey-derived ingredients. The overload level of the kits was highly variable (ranging from ...


Feasibility, Safety, Economic And Environmental Implications Of Whey-Recovered Water For Cleaning-In Place Systems: A Case Study On Water Conservation For The Dairy Industry, Yulie E. Meneses-GonzáLez May 2016

Feasibility, Safety, Economic And Environmental Implications Of Whey-Recovered Water For Cleaning-In Place Systems: A Case Study On Water Conservation For The Dairy Industry, Yulie E. Meneses-GonzáLez

Dissertations, Theses, & Student Research in Food Science and Technology

Several countries around the world are facing the challenge of producing food with limited water resources for a growing population. This reality is forcing all sectors involved in the food supply chain to look for water conservation strategies that contribute to assure global food security. Besides water consumption, the food industry has to deal with wastewater generation; therefore, water reconditioning and reuse is an attractive solution to address both issues. The goal of this research was to demonstrate that high quality water can be recovered from whey, a by-product of the cheese making process, and reused in cleaning-in place (CIP ...


Improving The Utilization Of Dry Edible Beans In A Ready-To-Eat Snack Product By Extrusion Cooking, Franklin Sumargo Apr 2016

Improving The Utilization Of Dry Edible Beans In A Ready-To-Eat Snack Product By Extrusion Cooking, Franklin Sumargo

Dissertations, Theses, & Student Research in Food Science and Technology

The growing snacking habit and steady increasing demand for healthy snacks have drastically changed the ready-to-eat snack market in recent years. While the current healthy, ready-to-eat snack products are still dominated by whole cereal grains, legumes, especially dry edible beans, have a high potential to emerge in nutritional, novel food. Dry edible beans (Phaseolus Vulgaris L) are not only economically valuable but also nutritionally important, since they are important sources of proteins, B vitamins, mineral elements, and soluble dietary fibers even when compared to whole grain cereals. Recent studies have shown extrusion processing is not only effective at producing an ...


Characterization Of Extraction Methods To Recover Phenolic-Rich Extracts From Pinto Beans (Baja) That Inhibit Alpha-Amylase And Alpha-Glucosidase Using Response Surface Approaches, Mohammed Alrugaibah Apr 2016

Characterization Of Extraction Methods To Recover Phenolic-Rich Extracts From Pinto Beans (Baja) That Inhibit Alpha-Amylase And Alpha-Glucosidase Using Response Surface Approaches, Mohammed Alrugaibah

Dissertations, Theses, & Student Research in Food Science and Technology

Pinto beans contain high levels of diverse phenols, known mainly for their potent antioxidative properties. However, reports have shown that phenols can inhibit the carbohydrate–hydrolysis enzymes, alpha-amylase and alpha-glucosidase, thereby retarding glucose absorption. Still, a severe gap in knowledge exists on the ability of pinto beans to inhibit these enzymes. Therefore, the objective of this project was to determine the ability of phenolic rich extracts obtained from pinto beans (BaJa) to inhibit alpha-amylase and alpha-glucosidase. The hypothesis was that pinto beans would be able to inhibit these enzymes due to the presence of high levels of chemically diverse phenols ...


Studies Of Debaryomyces Hansenii Killer Toxin And Its Effect On Pathogenic Bloodstream Candida Isolates, Rhaisa A. Crespo Ramírez Apr 2016

Studies Of Debaryomyces Hansenii Killer Toxin And Its Effect On Pathogenic Bloodstream Candida Isolates, Rhaisa A. Crespo Ramírez

Dissertations, Theses, & Student Research in Food Science and Technology

Candida species are normal commensal organisms found in the skin, mouth, and gastrointestinal and genitourinary tracts of humans. Candida albicans is a normal component of the gut flora, and the oral and genital cavities. However, this organism is an opportunistic pathogen and it is one of the most frequently isolated species from patients with nosocomial fungal infections. Candida infections have grown in recent years due to antimycotics resistance and the extensive use of antibiotics. This has pushed scientists to look for alternative therapeutic agents to treat fungal infections.

Yeasts can produce toxic proteins called “mycocins” or “killer toxins” that can ...