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4015 full-text articles. Page 1 of 95.

Local, Organic, Inexpensive And Safe: Can Large Retailers Do It All?, Henry An, Sebastien Pouliot, Richard Volpe 2016 University of Alberta

Local, Organic, Inexpensive And Safe: Can Large Retailers Do It All?, Henry An, Sebastien Pouliot, Richard Volpe

Sebastien Pouliot

One of the most important changes in the food industry in recent decades has been the increase in retailer concentration at the national level. The trade publication Progressive Grocer releases the Super 50 annually, a ranking of the 50 largest food retailers in the U.S., by receipts. In 1997 the top 5 retailers controlled 24 percent of the national market. By 2004 this figure was 46 percent and by 2010, 61 percent.1 Much of this change has been driven by waves of mergers and acquisitions (Franklin, 2001), but it is impossible to overlook the role that big box ...


Welfare Effects Of Mandatory Traceability When Firms Are Heterogeneous, Sebastien Pouliot 2016 Iowa State University

Welfare Effects Of Mandatory Traceability When Firms Are Heterogeneous, Sebastien Pouliot

Sebastien Pouliot

We develop a framework in which the cost of producing a quantity food and the cost of food safety differs across firms. We show that large firms may supply the safest food even though small firms have a cost advantage in producing safe food. The model shows that mandatory traceability can decrease the overall safety of food when small firms that supply the safest food exit the industry. Our model applies to food safety but can be applied to a wide range of issues related to regulation and product quality.


Consumer Confidence In Food Safety And The 2010 Egg Recall, Sebastien Pouliot 2016 Iowa State University

Consumer Confidence In Food Safety And The 2010 Egg Recall, Sebastien Pouliot

Sebastien Pouliot

Iowa egg producers recalled nearly 500 million eggs in August 2010. The typical effect of a recall is to cause a decline in the demand for the affected product, yielding a decrease in the price. In the case of August 2010 egg recall, the price of eggs increased in the following weeks. This essay investigates the market effects of the egg recall. I estimate a system of simultaneous equations that includes supply and demand equations for the two main segments of the US industry. This essay offers preliminary evidence of the market effects of the August 2010 egg recall and ...


Food Safety Posters For Safe Handling Of Leafy Greens, Lakshman Rajagopal, Susan W. Arendt, Angela Shaw, Catherine H. Strohbehn, Kevin L. Sauer 2016 Iowa State University

Food Safety Posters For Safe Handling Of Leafy Greens, Lakshman Rajagopal, Susan W. Arendt, Angela Shaw, Catherine H. Strohbehn, Kevin L. Sauer

Susan W. Arendt

This article describes food safety educational tools depicting safe handling of leafy greens that are available as downloadable posters to Extension educators and practitioners (www.extension.iastate.edu). Nine visual-based minimal-text colored posters in English, Chinese, and Spanish were developed for use when formally or informally educating foodservice workers about safely handling leafy greens. A three-phase methodology included the use of expert knowledge, microbial sampling, and observational study in Iowa and Kansas foodservice operations. Use of the posters was shown to have positive impacts on both microbial levels and food safety behaviors, suggesting that the posters can be useful tools ...


Bioeconomies Of Scope And The Discard Problem In Multiple-Species Fisheries, Rajesh Singh, Quinn Weninger 2016 Iowa State University

Bioeconomies Of Scope And The Discard Problem In Multiple-Species Fisheries, Rajesh Singh, Quinn Weninger

Quinn Weninger

We consider the problem of multi-species fisheries management when targeting individual species is costly and at-sea discards of fish by fishermen are unobserved by the regulator. Stock conditions, ecosystem interaction, technological specification, and relative prices under which at-sea discards are acute are identified. A dynamic model is developed to balance ecological interdependencies among multiple fish species, and scope economies implicit in a costly targeting technology. Three regulatory regimes, species-specific harvest quotas, landing taxes, and revenue quotas, are contrasted against a hypothetical sole-owner problem. An optimal plan under all regimes precludes discarding. For both very low and very high levels of ...


Processing Feed Ingredients From Blends Of Soybean Meal, Whole Blood, And Red Blood Cells, Linfeng Wang, Rolando A. Flores, Lawrence A. Johnson 2016 Kansas State University

Processing Feed Ingredients From Blends Of Soybean Meal, Whole Blood, And Red Blood Cells, Linfeng Wang, Rolando A. Flores, Lawrence A. Johnson

Lawrence A. Johnson

Fish meal is a high quality, but expensive and scarce, feed ingredient used in fish and poultry feeds. Blood meal, a slaughterhouse by-product, and soybean meal are high quality protein sources successfully used to partially replace fish meal in animal diets; however, the dehydration cost for blood meal makes it as expensive as fish meal. In this study, feed ingredients were developed using soybean meal and pork blood. Whole blood and red blood cells were mixed with soybean meal and processed under different conditions. The methods evaluated were mixing and then drying at temperatures of 50, 70, 90, and 110 ...


Atlantis Program Allows Eu, Us Students To Focus On Biorenewable Resources, Howell Medders, Andrew Proctor, Lawrence A. Johnson, Ronald L. Madl, D. Raj Raman 2016 University of Arkansas

Atlantis Program Allows Eu, Us Students To Focus On Biorenewable Resources, Howell Medders, Andrew Proctor, Lawrence A. Johnson, Ronald L. Madl, D. Raj Raman

Lawrence A. Johnson

EU-US Atlantis is an umbrella program for a variety of inno­ vative educational opportunities for students and faculty to study and conduct research abroad and for curriculum development. The Integral Valorization of Bio-Production (IVBP) program, funded for 2008-2012, provides financial assistance for US students to study in Europe and for EU students to study in the United States.


Soybean Oil Ester Fuel Blends, Lawrence A. Johnson, Earl G. Hammond 2016 Iowa State University

Soybean Oil Ester Fuel Blends, Lawrence A. Johnson, Earl G. Hammond

Lawrence A. Johnson

A method is provided to reduce the crystallization temperature of a fatty acid oil ester-petroleum distillate fuel blend. The method comprises combining a petroleum distillate with an amount of an ester of a branched chain (C3 -C5) alcohol of a fatty acid, wherein the amount utilized is effective to lower the crystallization onset point of the blend by about 8°-20° C. Blowy that of a blend comprising the same amount of a methyl or ethyl ester.


Starch-Thickened Acidic Foodstuffs And Method Of Preparation, Pamela J. White, Linda M. Pollak, Lawrence A. Johnson 2016 Iowa State University

Starch-Thickened Acidic Foodstuffs And Method Of Preparation, Pamela J. White, Linda M. Pollak, Lawrence A. Johnson

Lawrence A. Johnson

Starch-thickened acidic foodstuffs are provided in which the starch used as a thickener comprises sugary-2 starch obtaining from sugary-2 genotype maize seeds. Sugary-2 starch can be effectively used as a thickener in foodstuffs having a pH of 2.0 to 5.5.


Simplified Process For Soybean Glycinin And Â-Conglycinin Fractionation, Shaowen Wu, Patricia A. Murphy, Lawrence A. Johnson, Mark A. Reuber, Alfred R. Fratzke 2016 Iowa State University

Simplified Process For Soybean Glycinin And Â-Conglycinin Fractionation, Shaowen Wu, Patricia A. Murphy, Lawrence A. Johnson, Mark A. Reuber, Alfred R. Fratzke

Lawrence A. Johnson

A simplification of the pilot-plant scale modified Nagano method yielding two protein fractions, glycinin and â-conglycinin, by pH adjustment and ultrafiltration membrane separation was developed and compared with our pilot-plant-scale modified Nagano procedure and with a soy protein isolate pilot-plant procedure as our reference process. Two protein fractions, glycinin and â-conglycinin, were produced from our simplified process and compared to the three protein fractions, glycinin, â-conglycinin, and an intermediate protein mixture, produced with the modified Nagano method. The pilot-plant yields of glycinin, â-conglycinin, and intermediate mixture fractions from the modified Nagano method were 9.4, 10.3, and 4.8 ...


Techno-Economic Analysis Of Integrated Enzyme Assisted Aqueous Extraction Of Soybean Oil, Ming-Hsun Cheng, Weitao Zhang, Kurt A. Rosentrater, Jasreen J. K. Sekhon, Tong Wang, Stephanie Jung, Lawrence A. Johnson 2016 Iowa State University

Techno-Economic Analysis Of Integrated Enzyme Assisted Aqueous Extraction Of Soybean Oil, Ming-Hsun Cheng, Weitao Zhang, Kurt A. Rosentrater, Jasreen J. K. Sekhon, Tong Wang, Stephanie Jung, Lawrence A. Johnson

Lawrence A. Johnson

Aqueous oil extraction is a process which replace organic solvent, hexane is most used in solvent extraction, with water. Comparing to typical solvent extraction and expelling processes, the aqueous extraction has higher oil yield (over 80%) than expelling process and that is exempt the issues resulted from chemical loading and remaining. The enzyme was used to improve the breakdown of cell and release free oil. The enzyme assisted aqueous extraction process (EAEP) includes dehulling, flaking, extraction and demulsification processes. SuperPro Designer was used to conduct the techno-economic analysis (TEA) of the extraction process. The total capital investment, operation cost and ...


Enzyme-Assisted De-Emulsification Of Aqueous Lipid Extracts, Christopher Penet, Peter Birschbach, Buddhi P. Lamsal, Lawrence A. Johnson, Stephanie E. Glatz, Charles E. Glatz, Cheng Zhang, Jianping Wu 2016 Iowa State University

Enzyme-Assisted De-Emulsification Of Aqueous Lipid Extracts, Christopher Penet, Peter Birschbach, Buddhi P. Lamsal, Lawrence A. Johnson, Stephanie E. Glatz, Charles E. Glatz, Cheng Zhang, Jianping Wu

Lawrence A. Johnson

Compositions and processes for destabilizing an oil-in-water emulsion resulting from the aqueous solvent extraction of plant oils are disclosed. The processes comprise the use of one or more enzyme activities including phospholipase and protease activity. The processes are useful for improving the extraction of oil from oilseeds, as well as for obtaining more desirable proteins from those oilseeds.


European Food-Safety Concerns: From Farm To Market, D. Burden, Lawrence A. Johnson 2016 Iowa State University

European Food-Safety Concerns: From Farm To Market, D. Burden, Lawrence A. Johnson

Lawrence A. Johnson

In May of this year, 14 students from Iowa State University (ISU) had the opportunity to visit England and Scotland to examine food-safety issues, with emphasis on increasing the exposure to and understanding of European food-safety concerns, farming practices,the regulatory environment,research activities, and consumer attitudes.


Economic-Engineering Assessment Of Sequential Extraction Processing Of Corn, Dongil Chang, Mila P. Hojilla-Evangelista, Lawrence A. Johnson, Deland J. Myers 2016 Chungnam National University

Economic-Engineering Assessment Of Sequential Extraction Processing Of Corn, Dongil Chang, Mila P. Hojilla-Evangelista, Lawrence A. Johnson, Deland J. Myers

Lawrence A. Johnson

A simulation model, termed SIMSEP for simulating the Sequential Extraction Process (SEP), was developed to assess the economic and engineering feasibilities of SEP, an innovative approach to processing corn into ethanol, edible oil, industrial and edible proteins, andfeed ingredients. SEP is designed to produce a new mix of value-added coproducts that could improve the profitability of processing corn and corn-derived ethanol. Simulations were carried out for various system variables to examine their effects on profitability. Results showed that SEP is economically and technically feasible. Estimates for return on investment for a proposed plant are attractive under many likely market situations ...


Novel Corn Degerming Ethanol Fermentation Processes, Hui Wang, Tong Wang, Lawrence A. Johnson 2016 Iowa State University

Novel Corn Degerming Ethanol Fermentation Processes, Hui Wang, Tong Wang, Lawrence A. Johnson

Lawrence A. Johnson

The invention presents novel corn fermentation processes that remove the oil-rich fraction either during or after fermentation instead of before fermentation as usual. Besides recovery of high value oil-rich fraction of the corn, the processes also produce other value-added co-products such as that with high fiber or high protein but low oil contents.


Environmental Impact Analysis Of Soybean Oil Production From Expelling, Hexane Extraction And Enzyme Assisted Aqueous Extraction, Ming-Hsun Cheng, Weitao Zhang, Kurt A. Rosentrater, Jasreen J. K. Sekhon, Tong Wang, Stéphanie Jung, Lawrence A. Johnson 2016 Iowa State University

Environmental Impact Analysis Of Soybean Oil Production From Expelling, Hexane Extraction And Enzyme Assisted Aqueous Extraction, Ming-Hsun Cheng, Weitao Zhang, Kurt A. Rosentrater, Jasreen J. K. Sekhon, Tong Wang, Stéphanie Jung, Lawrence A. Johnson

Lawrence A. Johnson

In the industry, expelling and hexane extraction are the two typical processes for soybean oil production. However, the low efficiency and hazardous chemical problem are the main issues for these two processes respectively. Enzyme assisted aqueous extraction process (EAEP) is applied to increase the efficiency without using organic solvent, which is replaced by water. The environmental impact analysis of these three processes are based on their mass flows, energy consumption and global warming potential. For mass flows, the environmental impact indices were calculated based on mass balance of input and output components. Energy consumption was used to evaluate the carbon ...


Seminar In India Well Attended, Lawrence A. Johnson 2016 Iowa State University

Seminar In India Well Attended, Lawrence A. Johnson

Lawrence A. Johnson

The India Section of the AOCS held a one­ day seminar February 21 on "Emerging Technologies in the Oils and Fats Industry." Approximately 70 industry, government, and academic professionals from across India were in attendance, as were AOCS Vice President Larry Johnson, Executive Vice President Jean Wills,and Membership Director Kathy Atchley.


Process For Producing Improved Soy Protein Concentrate From Genetically-Modified Soybeans, Lawrence A. Johnson 2016 Iowa State University

Process For Producing Improved Soy Protein Concentrate From Genetically-Modified Soybeans, Lawrence A. Johnson

Lawrence A. Johnson

The present invention provides an economical method to produce an improved soy protein concentrate from soybeans which have been genetically-modified to reduce or eliminate the raffinose, stachyose and lipoxygenase content and associated off-flavors. The improved soy protein concentrate is highly functional, has good palatability and high retention of vitamins, minerals and isoflavones, little or no indigestible oligosaccharides, and is low in fiber such that it can be used in place of soy protein isolates in many applications. Further, the low processing costs of the present invention result in an economical product which offers a superior alternative for lower value uses ...


Effects Of Salt And Nitrite Concentration On The Shelf Life Of Deli-Style Ham, Regan E. Stanley 2016 University of Nebraska - Lincoln

Effects Of Salt And Nitrite Concentration On The Shelf Life Of Deli-Style Ham, Regan E. Stanley

Theses and Dissertations in Animal Science

Deli-style hams were manufactured to measure the effects of salt and nitrite concentration on shelf life and physicochemical characteristics. Three replications of deli-style ham treatments were manufactured in a 3 x 4 factorial arrangement of salt concentration (0.7%, 1.4%, or 2.1%, meat block basis) and nitrite concentration and source (0 ppm, 100 ppm or 200 ppm sodium nitrite, SN, or 100 ppm sodium nitrite equivalent from pre-converted celery juice powder, CP; Veg Stable 506, Florida Food Products). Salt concentration, water activity, cook yield, and texture profile analysis (TPA) were measured on w 0. Color, pH, residual nitrite ...


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

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

Dissertations & Theses 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 ...


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