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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.


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.


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 ...


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 ...


A Three-Year Level Study Of The Profitability Of Corn And Soybean Production, Todd D. Davis, william m. edwards 2016 Iowa State University

A Three-Year Level Study Of The Profitability Of Corn And Soybean Production, Todd D. Davis, William M. Edwards

william edwards

Crop producers face many decisions each year about the quantity and quality of inputs to use, the purchasing of these inputs, and the timing of production operations. Because their time for gathering and analyzing information on which to base management decisions is limited, they need to know which decision, areas have the greatest impact on profitability. A set of detailed and accurate records of production, costs, and returns from a group of producers growing corn and soybeans in Iowa over a three-year period was.available from Iowa State University Extension. This information was used to assess the relative importance of ...


Estimated Costs Of Production For Winter Canola In Iowa, Rafael A. Martinez-Feria, Keri Jacobs, Mary H. Wiedenhoeft 2016 Iowa State University

Estimated Costs Of Production For Winter Canola In Iowa, Rafael A. Martinez-Feria, Keri Jacobs, Mary H. Wiedenhoeft

Ag Decision Maker

Canola is a productive crop commonly grown in regions outside the Midwestern Corn Belt for its high-quality, edible oil. The oilseed is traded in global commodity markets and its price has seen significant increases during the last decade, primarily due to a steady domestic demand for vegetable oil and strengthening international demand for Canadian canola (1). Findings from our field studies indicate that winter varieties of canola planted in early fall in Iowa (mid-August to early-Sept) have the potential to overwinter and be harvested in mid-July (2). For producers who wish to incorporate alternative crops into their rotation, winter canola ...


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 2016 University of Nebraska-Lincoln

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

Dissertations & Theses 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 2016 University of Nebraska-Lincoln

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

Dissertations & Theses 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 ...


Psychological Aspects Of Slaughter: Reactions Of College Students To Killing And Butchering Cattle And Hogs, Harold A. Herzog Jr., Sandy McGee 2016 Mars Hill College

Psychological Aspects Of Slaughter: Reactions Of College Students To Killing And Butchering Cattle And Hogs, Harold A. Herzog Jr., Sandy Mcgee

Harold Herzog

This study examined the reactions of college students involved in slaughtering cattle and hogs as part of their jobs on a college work crew. The 27 students were surveyed on attitudes containing items toward slaughtering animals and toward different uses of animals. Nineteen were later interviewed. Some aspects of slaughtering were reported to be more bothersome than others. There was a relationship between the amount of experience of the subjects in slaughtering and also their general attitudes toward various uses of animals and their responses to several of the items on the questionnaire. The perceived benefits of the slaughtering experience ...


Improving Agricultural Workers Food Safety Knowledge Through An Online Curriculum, Angela M. Shaw, John Dzubak, Catherine Strohbehn, Linda Naeve 2016 Iowa State University

Improving Agricultural Workers Food Safety Knowledge Through An Online Curriculum, Angela M. Shaw, John Dzubak, Catherine Strohbehn, Linda Naeve

Professional Agricultural Workers Journal

Abstract

A one-hour online food safety curriculum was developed to inform university farm workers on food safety hazards associated with production and harvesting of fresh produce. The farm curriculum consists of five sections (food safety importance, pre-harvest hazards, post-harvest hazards, personal hygiene, and regulations). Engagement activities and a user manual were developed to support the curriculum. Curriculum content was validated by an expert panel and a convenience panel of farm workers. The developed curriculum was piloted at two land grant universities (n=50). Multiple-choice quizzes were used to assess knowledge changes in each of the sections. Results indicated significant knowledge ...


Genetic Haplotypes And Family History Of Alzheimer’S Disease Modify Homocysteine And Influence Neurovascular Pathology, Joe Webb 2016 Iowa State University

Genetic Haplotypes And Family History Of Alzheimer’S Disease Modify Homocysteine And Influence Neurovascular Pathology, Joe Webb

Honors Projects and Posters

Objective: To delineate novel relationships between Alzheimer disease (AD) factors, such as Translocase of the Outer Mitochondrial Membrane - kD 40 (TOMM40) genotype, AD family history (FH), vascular risk factors, and vascular neuropathology Methods: We performed linear mixed model regression on imaging and biomarker data from the Alzheimer’s Disease Neuroimaging Initiative (ADNI) cohort. Among 210 healthy adults with 1 or 2 Apolipoprotein ε4 (APOE4) alleles, we stratified by TOMM40 genotypes S/L, L/L, L/VL. Main effects and interactions between TOMM40 and FH were conducted on white matter hyperintensities (WMH), infarctions, and total intracranial volume. Vascular risk factors homocysteine ...


Food Safety Management Practices Of Small And Medium Sized Food Industry Enterprizes In Tanzania, Bright Barestus Kahindi 2016 Western Kentucky University

Food Safety Management Practices Of Small And Medium Sized Food Industry Enterprizes In Tanzania, Bright Barestus Kahindi

Masters Theses & Specialist Projects

The study aimed to investigate the food safety practices of HACCP and ISO2200 in food establishments in Tanzania, focused on knowledge (awareness) and management practices of food safety systems. The research randomly surveyed 200 food establishments from three regions in the country; only 113 managers completed the survey. Research conducted face-to-face by questioning knowledge (employees and managers), management practices (ISO 22000, HACCP and prerequisites programs, GMP and SSOP), and demographic information. Employees indicated to have more knowledge on the use of GMP (64.3 %) than HACCP (22.9%) and ISO22000 (15.4%) and training of employees was GMP (73.9 ...


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