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1
Surendera, Babu Aruna. "Food safety communication in Nevada needs assessment /." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1433410.
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Pillsbury, Laura Anne. "Food cultures, total diet studies and risk management implications for global food policy and public health /." Connect to this title, 2008. http://scholarworks.umass.edu/theses/157/.
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Zhang, Yingchuan. "Product quality modeling and control based on vision inspection with an application to baking processes." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04082005-150621/.
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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2005.Dr. Jennifer E. Michaels, Committee Chair ; Dr. Bonnie Heck Ferri, Committee Member ; Dr. George J. Vachtsevanos, Committee Member ; Dr. Magnus Egerstedt, Committee Member ; Dr. Farrokh, Ayazi, Committee Member ; Dr. Sheldon M. Jeter, Committee Member. Vita. Includes bibliographical references.
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Leuer, Debora Kim. "A comparison study of food facility inspection scores and consumer complaints." CSUSB ScholarWorks, 1999. https://scholarworks.lib.csusb.edu/etd-project/1711.
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Siu, Wing-ho Joseph. "The privatization of food and environmental hygiene services in Hong Kong : an evaluation and future prospects /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23294930.
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Ding, Yuhua. "An integrated approach to real-time multisensory inspection with an application to food processing." Diss., Available online, Georgia Institute of Technology, 2003:, 2003. http://etd.gatech.edu/theses/available/etd-11242003-180728/unrestricted/dingyuhu200312.pdf.
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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.Vachtsevanos, George J., Committee Chair; Dorrity, J. Lewis, Committee Member; Egerstedt, Magnus, Committee Member; Heck-Ferri, Bonnie S., Committee Co-Chair; Williams, Douglas B., Committee Member; Yezzi, Anthony J., Committee Member. Includes bibliography.
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Lewis, Andrew Michael. "Using Stochastic Optimization and Real-Options Models to Value Private Sector Incentives to Invest in Food Protection Measures." Thesis, North Dakota State University, 2006. https://hdl.handle.net/10365/29905.
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Agro-terrorism has become a major concern since the September 11, 2001, terrorist attacks due to characteristics that create unique problems for managing the threat of an agro-terrorist attack. The costs of trucking delays alone were in the tens of millions of dollars. Over the last few years, the government has spent billions of dollars on biological surveillance and record keeping in preventing potential attacks. Several public and private initiatives are currently in use. Examples include 1) the bio-terrorism regulation of 2004 on maintenance of records; 2) establishment of food protection centers for research and teaching excellence; and 3) investments in emerging technology, such as radio frequency monitoring (RFEM) technology, with the potential to track shipments and provide real-time data that can be used to prevent agro-terrorism risks along food supply chains. This thesis addresses the costs and risk premiums associated with alternative tracking strategies, where and when along the milk supply chain these strategies will reduce the most risks, and what policy implications are associated with the most costeffective tracking strategy. To accomplish these objectives, stochastic optimization is used to determine the costs and risk premiums of alternative tracking strategies. Next, the realoptions method along with a portfolio of options, also referred to as the "tomato garden" framework, is used to determine where and when alternative intervention strategies should be implemented to reduce the most risks. Finally, policy implications are derived on the cost-risk tradeoffs, probability of attacks, and containment efforts if there is an attack by using game theory to determine the incentives needed to motivate participants in the milk supply chain to invest in security measures.
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Lewis, Andrew (Andrew Michael). "Using Stochastic Optimization and Real-Options Models to Value Private Sector Incentives to Invest in Food Protection Measures." Thesis, North Dakota State University, 2006. https://hdl.handle.net/10365/29905.
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Agro-terrorism has become a major concern since the September 11, 2001, terrorist attacks due to characteristics that create unique problems for managing the threat of an agro-terrorist attack. The costs of trucking delays alone were in the tens of millions of dollars. Over the last few years, the government has spent billions of dollars on biological surveillance and record keeping in preventing potential attacks. Several public and private initiatives are currently in use. Examples include 1) the bio-terrorism regulation of 2004 on maintenance of records; 2) establishment of food protection centers for research and teaching excellence; and 3) investments in emerging technology, such as radio frequency monitoring (RFEM) technology, with the potential to track shipments and provide real-time data that can be used to prevent agro-terrorism risks along food supply chains. This thesis addresses the costs and risk premiums associated with alternative tracking strategies, where and when along the milk supply chain these strategies will reduce the most risks, and what policy implications are associated with the most costeffective tracking strategy. To accomplish these objectives, stochastic optimization is used to determine the costs and risk premiums of alternative tracking strategies. Next, the realoptions method along with a portfolio of options, also referred to as the "tomato garden" framework, is used to determine where and when alternative intervention strategies should be implemented to reduce the most risks. Finally, policy implications are derived on the cost-risk tradeoffs, probability of attacks, and containment efforts if there is an attack by using game theory to determine the incentives needed to motivate participants in the milk supply chain to invest in security measures.
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Webb-Yeates, Morgan. "Food Defense Among Meat Processing and Food Service Establishments in Kentucky." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1249.
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Agroterrorism is the deliberate introduction of a plant or animal disease with thegoal of causing fear, economic instability, illness, or death. After the 2002 terroristattacks on the World Trade Center, the security of the food supply is of increasingconcern to the United States. A major incidence of agroterrorism or food tampering would have far reaching impacts on the economy and public health. The first objective of this project was to determine knowledge and concern of agroterrorism in meat processing facilities in Kentucky, and to determine knowledge and concern of food tampering and food defense in food service establishments in Warren County, Kentucky. The second objective was to determine security strategies that were being implemented by these facilities. Two separate surveys, one for meat processors and the other for food service establishments, were designed to meet these objectives. An observational study was conducted for meat processing facilities. It was found that these facilities were generally unconcerned with agroterrorism, although a reasonable amount of security implementations were in place at these facilities. A statistical comparison between restaurants and non-restaurant food service establishments, such as schools, hospitals, and hotels, was performed. Both types of food service establishments expressed little concern about a food tampering event. Non- restaurant food service establishments were slightly more concerned than restaurants about both food tampering and food defense.
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Knipschild, Klaus. "Lebensmittelsicherheit als Aufgabe des Veterinär- und Lebensmittelrechts : Risikoverwaltung im europäischen Binnenmarkt /." Baden-Baden : Nomos-Verl.-Ges, 2003. http://www.gbv.de/dms/spk/sbb/recht/toc/365072354.pdf.
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Ostertag, Alice. "GVO-Spuren und Gentechnikrecht : die rechtliche Beurteilung und Handhabung von ungewollten Spuren gentechnisch veränderter Organismen in konventionell und ökologisch erzeugten Produkten /." Baden-Baden : Nomos, 2006. http://www.gbv.de/dms/ilmenau/toc/507200535.PDF.
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Lehrke, Linda. "Determining and Evaluating Cost-Effective Food Safety Risk Reduction Strategies at Retail Meat Facilities." Thesis, North Dakota State University, 2006. https://hdl.handle.net/10365/29906.
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In spite of the documented success of Pathogen Reduction and Hazard Analysis and Critical Control Points (PR/HACCP) at the processing level, farm-level and retail-level application is optional. Several factors impact the gap of food safety regulations from farm to fork. This thesis focuses on the retail level. At the retail level, pathogen survival and the associated ability to cause further disease to humans even after being subjected to certain processing and packaging conditions have varying implications on the probability of sickness or death. This issue also arises over the fact that, sometimes, appropriate handling and processing instructions are not properly followed by consumers. The primary goals of the project are to develop an optimal food safety intervention strategy that incorporates risk, cost, and the value of pathogen reduction with alternative control mechanism. We wish to evaluate incentives for PR/HACCP-like planning and adherence to best management practices that promote safe food production. These incentives will be evaluated for the retail level. In addition, we will develop optimal intervention strategies for ready-to-eat meats and poultry products that incorporate risk assessment, cost of intervention, and the value of risk reduction of alternative strategies for the farm-to-table continuum. The model adopted in this study is an expansion of the stochastic optimization model developed by Nganje, Kaitibie, and Sorin (2005) to include the optimal intervention strategy at the retail ( consumer) level. These components are simulated with firm-level microbial data at the processing and retail level using stochastic optimizer software. Stochastic dominance was also used to compare across the optimal strategies and determine if there is one clear choice that is preferred. This allowed us incorporate risk preferences of firms. The scenario method was used to determine what factors would likely affect the adoption of PR/HACCP at the retail level. Finally, this thesis provides firms and policymakers a direction for future options concerning risk mitigation strategies.
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Swart, Jacobus Johannes. "The impact of the logistical process on food safety and quality for maize export in South Africa." Thesis, Cape Peninsula University of Technology, 2012. http://hdl.handle.net/20.500.11838/1235.
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To be submitted in fulfilment of the requirements for the degree
MASTER OF TECHNOLOGIAE:
In
Quality
In the Faculty of Engineering
AT THE CAPE PENINSULA UNIVERSITY OF TECHNOLOGY, 2012Over the last decades, due to the lack of safety concern and inadequate quality management in logistical process, it caused unsafe and poor quality of maize products. Thus, this study looks into the key factors that affect maize exports from South Africa in order to improve the logistical processes and reduce the risks involved in the process. The main risks associated with poor traceability and logistical chain management of maize export, as well as issues pertaining to non-conformance to the different food safety standards were explored. Data were collected a group of food business operators (FBO) (n1=127) and food business inspectors (n2=20) through a number of interviews and a self-administered questionnaire. Data were then analysed by using the SPSS-V19 programme to generate descriptive statistical results to determine the specific needs and gaps within the current system as well as providing recommendations on the specific food safety changes pertaining to the maize export industry. The results showed that there is a lack of understanding among role-players regarding FBO legislation. In the comparison of many large companies, there is only a few small role-players adhere to the legislation pertaining to food safety and traceability. This has impacted on the quality of maize products negatively. This strongly suggested that all role-players that handle maize for export must be registered for FBO codes with Department of Agriculture, Forestry and Fisheries. The study also recommended that the Perishable Products Export Control Board (PPECB) should inspect and confirm the legitimacy of the FBO codes that appears on the maize export documentation. Keywords: Quality, food safety, food business operator, maize export, logistical processes, and traceability.
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Shang, Xia. "The Effect of Food Safety and Quality on the Consumption and Price of Meat in Beijing, China." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29312.
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China's economic success has helped it become one of the largest markets in the world. As a result, the demand for agricultural commodities in China has experienced a significant increase. Increasingly affluent Chinese people are paying increasing attention to food safety and quality instead of just quantity. Understanding how meat demands and prices are related to food safety and quality in Beijing will provide guidance for industry and policymakers interested in the Chinese meat market. The purpose of this study is to develop two models to analyze meat demand and prices associated with food safety and quality respectively. First, An Almost Ideal Demand System (AIDS) is used to investigate the effects of food safety on meat consumption. To address the potential bias of zero consumption in the estimation procedures, a simulated maximum likelihood (SML) estimation is applied in the regression. Second, we analyze the
implicit price of meat with the intrinsic and extrinsic attributes using a hedonic price model. Five meat categories are regressed on several intrinsic and extrinsic attributes in the model using household survey data collected in Beijing in 2007. The key results of this research have two major outcomes. First, food safety has a significant and positive influence on meat consumption for Beijing residents. Second, the
quality-related attributes or characteristics such as meat appearance, supermarket, meat brand, and processed meat as well as demographic variables such as household head's income have a significantly positive influence on the price of meat, which suggest that the consumers in Beijing are willing to pay a price premium to guarantee the quality and safety of meat.
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Siu, Wing-ho Joseph, and 蕭永豪. "The privatization of food and environmental hygiene services in Hong Kong: an evaluation and future prospects." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31966640.
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Sweney, Jill Marie. "Combining Systems Methodologies to Reduce Allergen-Related Food Recalls." PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2373.
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The risk of poor food safety is a major focus for managers in the food manufacturing industry. Despite industry-led and regulatory efforts to improve the overall food safety of US packaged consumer foods, product recalls and market withdrawals are increasing. This is especially true for the most frequent cause for food recall: the undeclared allergen. With industry trends leaning toward adoption of third-party food safety management certifications, a popular food safety code from the Safe Quality Foods Institute is evaluated using Systems Analysis. Three changes to the food safety code are proposed to address three of the top causes for an allergen-related recall in the United States. In practice, the SQF code should make better use of control theory to reduce delays in production monitoring activities, should make better use of purposeful action in the implementation of a HACCP plan to ensure continuing validity of the plan, and SQFI needs to consider adding an organizational assessment for food safety culture.
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侯米蘭. "關於中國內地食品安全法律制度若干問題的研究: 由安徽阜陽劣質奶粉事件引發的幾點思考." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1643266.
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王欣. "中國食品安全管理中政府監管的缺失分析 : 以三鹿事件為例." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2555529.
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Gu, Youyang. "Food adulteration detection using neural networks." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106015.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 99-100).
In food safety and regulation, there is a need for an automated system to be able to make predictions on which adulterants (unauthorized substances in food) are likely to appear in which food products. For example, we would like to know that it is plausible for Sudan I, an illegal red dye, to adulter "strawberry ice cream", but not "bread". In this work, we show a novel application of deep neural networks in solving this task. We leverage data sources of commercial food products, hierarchical properties of substances, and documented cases of adulterations to characterize ingredients and adulterants. Taking inspiration from natural language processing, we show the use of recurrent neural networks to generate vector representations of ingredients from Wikipedia text and make predictions. Finally, we use these representations to develop a sequential method that has the capability to improve prediction accuracy as new observations are introduced. The results outline a promising direction in the use of machine learning techniques to aid in the detection of adulterants in food.
by Youyang Gu.
M. Eng.
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Scordino, Monica. "Food control: quality assurance and protection against adulteration techniques." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/1154.
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The quality assessment of agro-food typical of the member states is one of the primary objectives of economic policy and agriculture in the EU. The check on overall quality, according to the specifications and typical products, however, is subject to information gaps that are subject to continuous development of methods of analysis. This has resulted in multiple attempts at adulteration and counterfeiting, which allowed the use of poor quality products and / or different geographical origin and / or non-typical tree species, with consequences for consumers, local producers on "honest" on the preservation of local ecotypes. In this context, this research is a meaningful goal to promote local quality products and protection from the illegal adulteration techniques, providing analytical parameter control from the local reference for the consumer protection.
This PhD research was conducted almost entirely in agreement with the laboratory of Catania of Central Inspectorate Department of Protection and Prevention of Fraud quality of food products (ICQRF), considering its growing interest in organic production controls, as well as typical products of denomination of protected and controlled origin, determined by the new supervisory functions assigned to it by the rules mentioned above. In this context, this research has the meaningful objective of health-promoting typical quality products and protection against illegal adulteration techniques, providing analytical control parameter for the protection of the consumer.
The work has developed on several fronts, deepening different research topics as individual cases of study:
- Characterization of Sicilian peach cultivars with different ripening stages.
- Evaluation of bioactive compounds of chinotto extract used in the preparation of commercial soft drinks.
- Development of an analytical method for evaluating the adulteration of saffron with the less valuable spices.
- Detection of illegal use of short-chain aliphatic amines in the wax coating for fruit for consumption.
- Characterization of dansyl-biogenic amines by HPLC-UV-ESI/MS.
The analytical results of this PhD thesis have been the subject of communications from different conferences have produced many scientific papers and are currently applied at the ICQRF Laboratory of Catania in food official controls.
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Hossain, Rakia. "Safe Food in Bangladesh: Perception and Influences on Safe Food Purchasing." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/395524.
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Unsafe food is a global concern as it causes significant health risks to a large number of people. It has many and varied short and long-term health impacts such as salmonellosis, shigellosis, typhoid fever and even cancer. Therefore, safe food is the central concern for all stakeholders in the food system from producers to the marketplace to the household where the food is finally consumed. As an end point of the food safety chain, consumers demonstrate various strategies to ensure safe food from purchasing to consumption. Consumers’ food purchasing behaviour is greatly influenced by culture, economy, psychology and lifestyle. Therefore, understanding consumer attitude towards safe food is an important aspect for ensuring safe food and reducing foodborne illnesses in a community.
In developing countries like Bangladesh, food contamination and the food adulteration situation are widely known public health issues as well as concerns of growing importance in recent times. However, very little is known about consumer safe food purchasing behaviour in Bangladesh. Hence, this current research attempts to explore primary household food purchasers’ (PHFP) perception of safe food, their information sources of safe food knowledge and application of this knowledge when purchasing safe foods. To evaluate these, the current study applied a mixed method approach where quantitative surveys and qualitative focus group discussions were used as data collection methods. The findings of the study revealed that the primary household food purchaser (PHFP) was more concerned about the usage of chemicals in food and they reported considering chemical food hazards during food purchasing. Among other safe food purchasing factors freshness was found as one of the most important factors. Besides freshness, the PHFP considered appearance, taste, colour, seasonality, origin of the product and expiry date, as features to guide safe food purchasing. More than 50% of the PHFP reported that` safe food has not been diminished in the last five years in Bangladesh. Most of the PHFP relied on friends and family members as their information sources for safe food purchasing. Regardless of their perception, the PHFP showed much concern about safe food, hence, further planning and implementation of food safety related programs, as well as better education about safe food can help to mitigate these issues in this community. A number of recommendations were provided to inform future food safety related programs and additional research that aims to reduce foodborne illnesses in this community.Thesis (Masters)
Master of Medical Research (MMedRes)
School of Medical Science
Griffith Health
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Narayanan, Deepak. "Building and processing a dataset containing articles related to food adulteration." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100641.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2015.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (page 69).
In this thesis, I explored the problem of building a dataset containing news articles related to adulteration, and curating this dataset in an automated fashion. In particular, we looked at food-adulterant co-existence detection, query reforumulation, and entity extraction and text deduplication. All proposed algorithms were implemented in Python, and performance was evaluated on multiple datasets. Methods described in this thesis can be generalized to other applications as well.
by Deepak Narayanan.
M. Eng.
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September, Danwille Jacqwin Franco. "Detection and quantification of spice adulteration by near infrared hyperspectral imaging." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6624.
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Thesis (MSc Food Sc)--University of Stellenbosch, 2011.ENGLISH ABSTRACT: Near infrared hyperspectral imaging (NIR HSI) in conjunction with multivariate image analysis was evaluated for the detection of millet and buckwheat flour in ground black pepper. Additionally, midinfrared (MIR) spectroscopy was used for the quantification of millet and buckwheat flour in ground black pepper. These techniques were applied as they allow non-destructive, invasive and rapid analysis. Black pepper and adulterant (either millet or buckwheat flour) mixtures were made in 5% (w/w) increments spanning the range 0-100% (w/w). The mixtures were transferred to eppendorf tube holders and imaged with a sisuChema short wave infrared (SWIR) pushbroom imaging system across the spectral range of 1000–2498 nm. Principal component analysis (PCA) was applied to pseudo-absorbance images for the removal of unwanted data (e.g. background, shading effects and bad pixels). PCA was subsequently applied to the ‘cleaned’ data. An adulterant concentration related gradient was observed in principal component one (PC1) and a difference between black pepper adulterated with buckwheat and millet was noted in PC4. Four absorption peaks (1461, 2241, 2303 and 2347 nm) were identified in the loading line plot of PC1 that are associated with protein and oil. The loading line plot of PC4 revealed absorption peaks at 1955, 1999, 2136 and 2303 nm, that are related to protein and oil. Partial least squares discriminant analysis (PLS-DA) was applied to NIR HSI images for discrimination between black pepper adulterated with varying amounts of adulterant (millet or buckwheat). The model created with millet adulterated black pepper samples had a classification accuracy of 77%; a classification accuracy of 70% was obtained for the buckwheat adulterated black pepper samples. An average spectrum was calculated for each sample in the NIR HSI images and the resultant spectra were used for the quantification of adulterant (millet or buckwheat) in ground black pepper. All samples were also analysed using an attenuated total reflectance (ATR) Fourier transform (FT) – infrared (IR) instrument and MIR spectra were collected between 576 and 3999 cm-1. PLS regression was employed. NIR based predictions (r2 = 0.99, RMSEP = 3.02% (w/w), PLS factor = 4) were more accurate than MIR based predictions (r2 = 0.56, RMSEP = 19.94% (w/w), PLS factors = 7). Preprocessed NIR spectra revealed adulterant specific absorption bands (1743, 2112 and 2167 nm) whereas preprocessed MIR spectra revealed a buckwheat specific signal at 1574 cm-1. NIR HSI has great promise for both the qualitative and quantitative analysis of powdered food products. Our study signals the beginning of incorporating hyperspectral imaging in the analysis of powdered food substances and results can be improved with advances in instrumental development and better sample preparation.
AFRIKAANSE OPSOMMING: Die gebruik van naby infrarooi hiperspektrale beelding (NIR HB) tesame met veelvoudige beeldanalise is ondersoek vir die opsporing van stysel-verwante produkte (giers en bokwiet) in gemaalde swart pepper. Middel-infrarooi (MIR) spektroskopie is addisioneel gebruik vir die kwantifisering van hierdie stysel-verwante produkte in swart pepper. Albei hierdie tegnieke is toegepas aangesien dit deurdringend van aard is en dit bied nie-destruktiewe sowel as spoedige analise. Swart pepper en vervalsingsmiddel (giers of bokwiet) mengsels is uitgevoer in 5% (m/m) inkremente tussen 0 en 100% (m/m). Eppendorfbuishouers is met die mengsels gevul en hiperspektrale beelde is verkry deur die gebruik van ‘n sisuChema SWIR (kortgolf infrarooi) kamera met ‘n spektrale reikwydte van 1000–2498 nm. Hoofkomponent-analise (HK) is toegepas op pseudo-absorbansie beelde vir die verwydering van ongewenste data (bv. agtergrond, skadu en dooie piksels). Hoofkomponent-analise is vervolgens toegepas op die ‘skoon’ data. Hoofkomponent (HK) een (HK1) het die aanwesigheid van ‘n vervalsingsmiddel konsentrasie verwante gradient getoon terwyl HK4 ‘n verskil getoon het tussen swart pepper vervals met giers en bokwiet. Vier absorpsiepieke (1461, 2241, 2303 en 2347 nm) was geïdentifiseer binne die HK lading stip van HK1 wat met proteïen en olie geassosieer kon word. Die HK lading stip van HK4 het absorpsipieke by 1955, 1999, 2136 en 2303 nm aangedui wat verband hou met proteïen en olie. Parsiële kleinste waarde diskriminant-analise (PKW-DA) is toegepas op die hiperspektrale beelde vir die moontlike onderskeiding tussen swart pepper vervals met verskeie hoeveelhede vervalsingsmiddel (giers of bokwiet). ‘n Klassifikasie koers van 77% is verkry vir die model ontwikkel met giers vervalsde swart pepper terwyl die model ontwikkel met bokwiet vervalsde swarte pepper ‘n klassifikasie koers van 70% bereik het. ‘n Gemiddelde spektrum is bereken vir elke monster in die hiperspektrale beelde en die resulterende spektra is gebruik vir die kwantifisering van vervalsingsmiddels (giers of bokwiet) in gemaalde swart pepper. ‘n ATR FT-IR instrument met spektrale reikwydte van 576-3999 cm-1 is additioneel gebruik vir die analise van alle monsters. Parsiële kleinste waarde regressie is gebruik vir kwantifikasie doeleindes. NIR gebasseerde voorspellings (r2 = 0.99, RMSEP = 3.02% (m/m), PLS faktore = 4) was meer akkuraat as die MIR gebasseerde voorspellings (r2 = 0.56, RMSEP = 19.94% (m/m), PLS faktore = 7). Vooraf behandelde NIR spektra het vervalsingsmiddel verwante absorpsiepieke (1743, 2112 en 2167 nm) aangetoon terwyl vooraf behandelde MIR spektra ‘n bokwiet verwante absorpsiepiek by 1574 cm-1 aangedui het. NIR HB toon goeie potensiaal vir beide kwalitatiewe en kwantitatiewe analise van gepoeierde voedsel produkte. Ons studie kan gesien word as die begin van die inkorporasie van hiperspektrale beelding in die analise van gepoeierde voedsel material en verbeterde resulte kan verkry word deur die vordering in instrumentasie ontwikkeling en verbeterde monstervoorbereiding.
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Kulas, Megan. "Policy responses to reduce the opportunity for horsemeat adulteration fraud: the case of the European Union." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/18243.
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Master of ScienceDepartment of Diagnostic Medicine/Pathobiology
Justin Kastner
Food production is changing in response to an expanding global population. The ability to distribute and process ingredients amongst many individuals and countries has brought economic benefits while also creating new problems. By increasing the complexity of the supply chain, the food industry has birthed new dynamics, thus creating new opportunities for contamination, fraud, and other threats. One threat dynamic is the varying levels of food safety and quality control at different nodes along a supply chain. Contaminations pinpoint weaknesses of a supply chain, and such weaknesses could be exploited for harm. One way foods are intentionally contaminated is through food fraud. Food fraud involves substitution, mislabeling, dilution, and other means of criminal deception. Routine testing by an independent science-based group led to the discovery of one the largest scales of substitution and mislabeling in history—the 2013 adulteration of beef products with horsemeat. Commonly referred to as the horsemeat scandal of 2013, this important event in the history of the global food system affected several regions, hundreds of products, and thousands of retailers and consumers. To date, this scandal was one of the largest incidents of food fraud. Mostly based in the European Union, the horsemeat scandal prompted the European Commission to take regulatory action. The European Union’s policy response included the creation of a five-point plan that addresses the different facets associated with the scandal. The five-point plan sought to strengthen food fraud prevention; testing programs; horse passports; official control, implementation, penalties; and origin labelling. The five-point plan is intended to decrease the fraud opportunity for the adulteration of beef with horsemeat. According to the crime triangle, a concept frequently cited in the field of criminology, fraud opportunity has three main elements: the victims, the fraudsters, and the guardian and hurdle gaps. When any of these elements change, the opportunity for a fraudster to commit a crime also changes. The research question of this thesis explores the policy responses of the European Commission. The Commission’s five-point plan targets the three elements of fraud opportunity; therefore, future fraud opportunity for the adulteration of beef products with horsemeat will theoretically decrease.
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Mendenhall, Ivan Von. "Rapid Determination of Milk Components and Detection of Adulteration Using Fourier Transform Infrared Technology." DigitalCommons@USU, 1991. https://digitalcommons.usu.edu/etd/5367.
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Absorption bands responding to changes in fat, protein, and lactose concentrations in milk were determined. The effects of milk fat variation and lipolysis on the infrared spectrum were studied.
Absorbances from 1283 to 1100 cm-1 correlated with fat, protein, and lactose concentration and showed a low response to milk fat variation and lipolysis. A Fourier transform infrared spectrometer equipped with an attenuated total internal reflectance cell was calibrated using these absorption band s, partial least squares statistics, and milk samples from herds in Minnesota. When the fat, protein, and lactose concentrations in these samples were predicted, the standard deviations of difference (reference - infrared) were .22, .06, and .02% . When the fat, protein, and lactose concentrations in a separate set of samples from herds in California were predicted, the standard deviations of difference were 1.23, .10, and .07%. Substitution of a 15 μm pathlength transmission cell for the attenuated total internal reflectance cell changed the standard deviations of difference to .07, .11, and .06% in the calibration (Minnesota) samples and .09, .10, and .16% in the validation (California) samples.
Infrared spectroscopy was used to measure whey powder in an adulterated sample of nonfat dry milk. Mixtures of nonfat dry milk containing whey powder at various concentrations were analyzed using absorption bands between 1400 and 1200 cm-1 in the infrared spectrum. There was a strong correlation (r > .99) between predicted and measured concentrations of whey powder in adulterated samples. Accuracy was not affected by processing conditions , source of nonfat dry milk, and origin of whey powder.
A rapid method for detecting soybean oil in process cheese was developed. The infrared spectrum of each sample was collected using an accessory designed for analysis of solid samples. A linear relationship fit (= .98) when the ratio of absorbance at 2957 and 2852 cm-1 was plotted versus percent adulteration.
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Di, Anibal Carolina Vanesa. "Determination of banned sudan dyes in culinary spices through spectroscopic techniques and multivariate analysis." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/52794.
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La presente tesis esta focalizada en el desarrollo de métodos analíticos para determinar la adulteración de especias culinarias con colorantes Sudan I, II, III y IV. Estos colorantes están prohibidos como aditivos para uso alimentario por la legislación europea ya que son carcinógenos. Las metodologías analíticas desarrolladas están basadas en el uso de técnicas espectroscópicas como UV-visible, Resonancia Magnética de protón y Raman junto con tratamiento multivariante de los datos obtenidos. En relación al análisis multivariante, como principal objetivo se planteó el establecimiento de modelos de clasificación y posteriormente se utilizaron diversas herramientas quimiométricas con el objetivo de mejorar los resultados de clasificación: análisis exploratorio de datos, métodos de selección de variables y procesamiento de espectros, estrategias de fusión de datos y métodos de transferencia (estandarización).This thesis is focused at developing multivariate analytical screening methodologies for determining the adulteration of culinary spices with Sudan I, II, III and IV dyes. Such dyes are prohibited to be used as additive in foods according to the European legislation because they are Class 3 carcinogens. The proposed methodologies are based on the use of spectroscopic techniques such as UV-Visible, 1H-NMR and Raman along with multivariate data treatment. The applied chemometric tools include the establishment and application of supervised classification techniques combined with exploratory data analysis, data processing and variable selection techniques to extract the maximum possible information from the spectral data. Otherwise some strategies to improve the classification have been evaluated such as data fusion strategies and multivariate transfer (standardization) methods.
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Woodbury, Simon Edward. "Application of gas chromatography combustion-isotope ratio mass spectrometry to the detection of adulteration of vegetable oils." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246268.
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Chetima, Mai Moussa. "Auto-tuning mechanisms for vision-based food inspection systems." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28343.
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Machine vision solutions are becoming a standard for quality inspection in several manufacturing industries. In the processed-food industry where the appearance attributes of the product are essential to customer's satisfaction, visual inspection can be reliably achieved with machine vision. But such systems often involve the extraction of a larger number of features than those actually needed to ensure proper quality control, making the process less efficient and difficult to tune. This work experiments with several machine learning techniques in order to automate the initial tuning of a real-time vision-based food inspection system or to improve its performance. The impact of feature selection techniques on machine learning is also assessed. Identifying and removing as much irrelevant and redundant information as possible for a given learning scheme reduces the dimensionality of the data and allows classification algorithms to operate faster. In some cases, accuracy on classification can even be improved. The effect of filter-based and wrapper-based feature selectors is experimentally evaluated on different bakery products to identify the best performing approaches when combined with three fundamentally different machine learning strategies.
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Menevseoglu, Ahmed. "METABOLOMICS APPROACH FOR AUTHENTICATION OF PISCO AND DETECTION OF CONTAMINANTS." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574841283680933.
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Amza, Catalin Gheorghe. "Intelligent X-ray imaging inspection system for the food industry." Thesis, De Montfort University, 2002. http://hdl.handle.net/2086/10731.
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The inspection process of a product is an important stage of a modern production factory. This research presents a generic X-ray imaging inspection system with application for the detection of foreign bodies in a meat product for the food industry. The most important modules in the system are the image processing module and the high-level detection system. This research discusses the use of neural networks for image processing and fuzzy-logic for the detection of potential foreign bodies found in x-ray images of chicken breast meat after the de-boning process. The meat product is passed under a solid-state x-ray sensor that acquires a dual-band two-dimensional image of the meat (a low- and a high energy image). A series of image processing operations are applied to the acquired image (pre-processing, noise removal, contrast enhancement). The most important step of the image processing is the segmentation of the image into meaningful objects. The segmentation task is a difficult one due to the lack of clarity of the acquired X-ray images and the resulting segmented image represents not only correctly identified foreign bodies but also areas caused by overlapping muscle regions in the meat which appear very similar to foreign bodies in the resulting x-ray image. A Hopfield neural network architecture was proposed for the segmentation of a X-ray dual-band image. A number of image processing measurements were made on each object (geometrical and grey-level based statistical features) and these features were used as the input into a fuzzy logic based high-level detection system whose function was to differentiate between bones and non-bone segmented regions. The results show that system's performance is considerably improved over non-fuzzy or crisp methods. Possible noise affecting the system is also investigated. The proposed system proved to be robust and flexible while achieving a high level of performance. Furthermore, it is possible to use the same approach when analysing images from other applications areas from the automotive industry to medicine.
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Mandarino, Pam. "Temporary Restaurant Closures and Food Handling Violations: Inspection Reports in British Columbia." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/3800.
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Unsafe food handling practices are implicated in many restaurant-associated foodborne disease outbreaks. Factors that contribute to unsafe food handling in restaurants include inadequate food safety knowledge, employees who perceive that safe food handling is not under their control, and restaurant cultures that do not prioritize food safety. The purpose of this study was to determine whether temporary restaurant closures were associated with reduced food handling violations after closure in restaurants from the Vancouver Coastal Health Authority and the Fraser Health Authority, in British Columbia, Canada. The theoretical foundations used were the health action process approach and the theory of planned behavior. Mixed-effects Poisson regression analyses showed that the typical restaurant had an estimated 16% increase in the average number of overall food handling violations per inspection after temporary closure, compared with before closure. Restaurant- and employee-related factors responsible for unsafe food handling practices likely result in the continuation of unsafe food handling practices, despite temporary restaurant closures. This study may contribute to positive social change by challenging the assumption that temporary restaurant closures motivate food handlers to improve their food handling practices. To protect the public's health, additional interventions must follow temporary restaurant closures for reasons such as insanitary conditions and improper food handling. Suggested interventions include the provision of targeted learning resources to restaurant managers, the issuing of directives requiring food handlers to attend recognized food safety training courses, and environmental health managers requiring a reduction in problematic menu items.
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Kelly, Simon Douglas. "The development of continuous-flow isotope ratio mass spectrometry methods and their application to the detection of food adulteration." Thesis, University of East Anglia, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251500.
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Prachárová, Adriana. "Stanovení autenticity potravinářských výrobků s ovocnou složkou." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449765.
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The aim of this thesis was to determine the authenticity of fruit food for infants using molecular and instrumental methods. In the experimental part, plant DNA isolations from fruit leaves (peaches, apricots, plums and apples) and bananas were performed. Further, DNA was isolated also from five commercial products, and from model mixtures that were prepared in terms of content identical to the commercial mixtures. The isolated DNA was characterized and verified by qPCR with plant DNA-specific ITS2 primers. Three triple primer pairs were selected, and their specificity was evaluated when performing multiplex PCR. This method makes it possible to detect more types of fruit in one reaction, reducing the economic and time requirements for detection. As none of the selected primer pairs were sufficiently specific for the apricot, the evidence from the plum and peach was further realized using duplex PCR. High resolution melting curve analysis was used for better DNA type recognition. Subsequently, agarose gel electrophoresis was performed to analyse the fragment lengths. Furthermore, experiments have been made to identify some specific phenolic substances in commercial and model fruit mixtures by HPLC. Since phenolic substances are degradable under unsuitable storage conditions, the presence of individual compounds was not detected by this method.
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COPPOLA, CHIARA. "SEAFOOD INSPECTION: CURRENT ISSUES." Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/784026.
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The thesis focuses on quality and safety aspects of different types of seafood by using a multidisciplinary approach, combining different types of analyses (behavioural studies, haemolymph analyses, microbiological and chemical-physical analyses) and regulatory aspects. The thesis consists of a collection of scientific papers and laboratory activities that report the main studies of my PhD research. In the first study the evaluation of the stress level during lobster commercialization was evaluated by analysing eight different haemolymph parameters. The second study faced the potential application of a new Loop-mediated isothermal amplification (LAMP) assay for the detection of Anisakis spp. in seafood products. The third study shows the preliminary results of an ongoing investigation that aims at developing a method suitable for the extraction of microplastics from mussels. The fourth study compared the chemical composition in fish roe products from different species in order to achieve a deeper knowledge of the chemical and microbiological composition of fish roe products collected on the Italian market.
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Smith, Alexander E. "Non-destructive online x-ray inspection of food products : new methods and techniques." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432276.
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Jackowiak, Jan. "Antemortem inspection of pigs on-farm : impact on food safety and animal welfare." Title page, table of contents and introduction only, 2000. http://web4.library.adelaide.edu.au/theses/09ANM/09anmj12.pdf.
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Copy of author's previously published artice inserted. Bibliography: leaves 94-105. Antemortem inspection is a visual health check that has always been done at the abattoir before slaughter to separate pigs that are suffering or that may not be completely suitable for human consumption... The adoption of hazard analysis and critical control point quality assurance systems by the Australian Pig Industry has provided a framework for performance of antemortem inspection on-farm. Producers in three states (Victoria, Queensland and South Australia) were trained to conduct antemortem inspection on-farm, and their efficiency evaluated against antemortem inspection conducted at the abattoir.
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Sousa, Emanuel Moniz. "Desenvolvimento de uma ferramenta de avaliação do risco para estabelecimentos de restauração." Master's thesis, ISA, 2013. http://hdl.handle.net/10400.5/6674.
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Mestrado em Engenharia Alimentar - Qualidade e Segurança Alimentar - Instituto Superior de AgronomiaThis study aimed to obtain a risk assessment tool, for services, quick to apply, analyze, and allowed to establish, by based way, the frequency of supervision actions by the responsible entity, allowing a greater action of the entities nearest the establishments whose risk is higher depending on the classification obtained in the end. Thus, developed a checklist that the result is crossed with the estimated risk for the activity in order to obtain the level of risk of the establishment and therefore the periodicity proper for the inspections. Results are introduced through a summary table and a radar chart, thereby facilitating analysis. Tool was tested in three food services, and proved to be effective because it was quick to apply and get the whole reality of the establishment. In general, the three food services obtained a good rating, and the higher risk nonconformities detected were the absence of any documentation associated with the process control in the unit A, some flaws in the physical facilities of the unit B and the absence of integrated pest control in the unit C.
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Jarvis, Rocky N. "The design of a qualification training guide for United States Department of Agriculture, Food Safety Inspection Service." Online version, 2004. http://www.uwstout.edu/lib/thesis/2004/2004jarvisr.pdf.
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Garcia-Amoedo, Luis Henrique. "Geléia real: análises físico-químicas e químicas úteis para a caracterização e detecção da autenticidade ou adulteração do produto." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-08062017-124034/.
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A geléia real é um dos principais produtos da colméia que serve como alimento para as larvas em desenvolvimento, assim como para a abelha rainha por toda a sua vida. Tem sido utilizada pelas pessoas como um complemento alimentar devido às suas propriedades revitalizantes. O principal objetivo deste trabalho foi estabelecer as análises físico-químicas e químicas que poderão ser usadas para a caracterização da geléia real e detecção de sua autenticidade ou adulteração, enfatizando-se a determinação do ácido 10-hidroxi-trans-2-decenóico (10-HDA). A proposta do trabalho está justificada pela falta de legislação com relação a padrões de identidade e qualidade da geléia real e derivados. Foram determinados emalostras puras e adulteradas (com clara de ovo, água potável, iogurte natural, pasta de amido e uma mistura de leite condensado com própolis) os teores de umidade, cinzas, Iípides, proteínas, carboidratos, 10-HDA, pH, acidez titulável, reação com lugol e teste de solubilidade em meio alcalino. Como análises complementares foram determinados os teores das vitaminas B6 , A, pró-vitamina A (β-caroteno) e vitamina E nas amostras puras. Considerando-se os resultados obtidos preconizou-se as determinações de umidade, cinzas, lípides, proteínas, carboidratos, 10-HDA e teste de solubilidade em meio alcalino como os principais itens a serem observados.Royal jelly is one of the most important products from beehive, which is used by growing up larves like food, and also for the queen bee for her entire life. It has being used by people as a complement because of the revitalizing properties. The main objective of this work was to establish the physicalchemical and chemical analysis, which could be used for characterization of the adulteration of royal jelly, mainly the 10-hidroxy-trans-2-decenoic acid (10-HDA). The purpose of this study is justified by the lack of legislation concerning the quality and identity standards of royal jelly and derivatives. There were determined in pure and adulterated samples (with condensed milk, water, yogurt, starch, egg white) the analysis of moisture, ash, lipids, proteins, carbohydrates, 10-HDA, pH, titrate acidity, iodine reaction, solubilíty test in alkaline solution. For complementary tests It was determined the values of vitamin B6 , A, provitamin A, and E in pure samples. Considering the obtained results it was suggested the use of moisture content, ash, lipids, proteins, carbohydrates, 10-HDA and solubility in alkaline solution, as the main items to be observed.
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Zhu, Bin. "Novel statistical pattern recognition and 3D machine vision technologies for automated food quality inspection." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8912.
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Thesis (Ph. D.) -- University of Maryland, College Park, 2008.Thesis research directed by: Fischell Dept. of Bioengineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Samb, Amadou. "Predictors of Compliance with the Food Safety and Inspection Service's Listeria Rule, 2012-2015." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/4097.
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Since 1987, the Food Safety and Inspection Service (FSIS) has implemented a zero-tolerance policy for Listeria monocytogenes (Lm) in ready-to-eat (RTE) meat and poultry products, which culminated with the implementation of the Listeria rule in 2003. While researchers have extensively examined human listeriosis and its causative agent, Lm, there remained a significant gap in the current literature regarding how, singly or in combination, establishment size, RTE product type, Listeria alternative used, and FSIS district of production predict compliance with the Listeria rule. Therefore, the purpose of this quantitative study was to investigate the relationship between establishment size, RTE product type, Listeria alternative used, FSIS district of production, and compliance with the Listeria rule. The deterrence theory was used to explain the relationships and associations between variables. Archival Lm sampling data collected between 2012 and 2015 by FSIS was used to analyze the relationships. Chi-square tests showed no significant statistical relationship between establishment size, Listeria alternative used, FSIS district, and compliance, but they did show a significant association between compliance, RTE salt-cured products, and fully cooked products. Additionally, logistic regression analysis showed that the odds of an Lm-positive sample was higher for salt-cured products than for fully-cooked products. This study's findings indicate the need for a reevaluation of FSIS Listeria prevention policy, with a focus on salt-cured products. These results can influence positive social change if used in a targeted public health outreach/education program that focuses on the food safety risks associated with salt-cured products.
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Filion, Katie. "Designing a national restaurant inspection disclosure system for New Zealand." Thesis, Kansas State University, 2010. http://hdl.handle.net/2097/6957.
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Master of ScienceDepartment of Diagnostic Medicine/Pathobiology
Douglas A. Powell
The World Health Organization estimates that up to 30% of individuals in developed countries become ill from food or water each year, with up to 70% of these illnesses estimated to be linked to food service. Restaurant inspections aim to prevent restaurant-associated foodborne outbreaks while enhancing consumer confidence in the safety of food prepared in these establishments. Inspection disclosure systems have been developed as a tool for consumers and incentive for foodservice operators. Disclsosure systems are common in developed countries; however, they are inconsistent. Previous research has not determined the best format to disclose inspection results to the public while providing incentives for operators. This research aimed to develop a consistent, compelling and trusted disclosure system for New Zealand. The research evaluated existing disclosure systems operating internationally and nationally. The national review interviewed with Environmental Health Officers (EHOs)(n=8), operators (n=109) and consumers (n=244), and findings were used for card designs. Cards were evaluated internally (n=43), then by 11 focus groups (n=68). Two cards, letter and gauge, were introduced to food premises (n=371) in six districts for three months for evaluation. Operators (n=269) and consumers (n=991) were interviewed to determine which design best communicated inspection results. The majority of operators indicated they had not received consumer feedback about the card, and half felt the card was something consumers would use. Less than half of consumers indicated they noticed cards prior to entering a premises; from these data it appeared the letter attracted more initial attention (78% of respondents) than the gauge (45%). Consumers indicated card placement was an important factor in noticing cards. Nearly all interviewed consumers indicated they expected cards at restaurants, take-aways and fish n’ chips shops. When asked which card they preferred, 58% (n=38) of operators with the gauge preferred the letter; and 79% (n=47) of operators with the letter preferred the letter. Consumer preference was for the letter, with 88% (n=133) of those in gauge districts preferring the letter, and 72% (n=161) of those in letter districts preferring the letter. Based on these data the letter card was recommended for a national inspection disclosure system for New Zealand.
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Damario, Natália 1988. "Estudo de adulteração de queijos = espectrometria de massas por uma abordagem inovadora." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312429.
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Orientador: Rodrigo Ramos CatharinoTexto em português e inglês
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: O alto consumo global de queijos e a flutuação de disponibilidade e preço destes produtos lácteos os tornam alvos de fraudes. Uma das mais comuns é a adulteração de leites de alto valor agregado, como os de cabra e ovelha, com o então menos valioso leite de vaca, posteriormente vendido como matéria-prima para a indústria de queijo. Esta prática cria a necessidade de técnicas sensíveis para avaliar a autenticidade de queijos, incentivando o desenvolvimento e melhoria de métodos analíticos. Neste caminho, nós trazemos esta abordagem empregando a Direct Imprinting in Glass Surface Mass Spectrometry (DIGS-MS) para análise qualitativa de queijo em um instrumento MALDI. Esse método inclui uma preparação de amostra simples e eficaz além de rápida aquisição e interpretação de dados. A abordagem comprovou identificar prontamente lipídios de massas grandes em diferentes tipos de queijo, que podem ser associados a marcadores de qualidade. Também representa um potencial para controlar não só o produto final, mas também etapas produtivas, através da integração de dados estatísticos e analíticos, resultando em uma combinação poderosa para a discriminação de amostras com base no perfil lipídico. A ausência do efeito de matriz em toda cadeia analítica garante maior limpeza de sinal de espectros de massa e simplifica o processo
Abstract: High global consumption of cheeses and their availability and price fluctuations make these foodstuffs targets for frauds. One of the most common is the adulteration of highly priced milk (goat and sheep) with less valuable cow milk, which is sold as raw material for cheese industry. This creates the need for sensitive techniques to assess cheese authenticity by encouraging the development and improvement of analytical methods. In this path, we bring this approach employing Direct Imprinting in Glass Surface Mass Spectrometry (DIGS-MS) for qualitative cheese analysis in a MALDI instrument. This method includes simple and effective sample preparation and fast data acquisition and interpretation. It has proven to readily identify higher mass lipids in different types of cheese, which can be associated as quality markers. This can also represent potential to control not only the final product, but also productive stages, by integrating analytical and statistical data, resulting in a powerful combination for sample discrimination based on lipid profiles. The absence of matrix effect in the whole analytical chain ensures greater signal cleanliness of mass spectra and simplifies the process
Mestrado
Ciencias Biomedicas
Mestra em Ciências Médicas
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Martins, Joana Guerreiro. "Classificação de subprodutos e o seu impacto económico num matadouro de ruminantes." Master's thesis, ISA/UL, 2015. http://hdl.handle.net/10400.5/11117.
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Mestrado em Engenharia Alimentar - Processamento e Conservação de Alimentos - Instituto Superior de AgronomiaFood safety consumer concern is increasing, which led to the implementation of stricter hygiene rules which are applicable to animal products. In this scenario, slaughterhouses and sanitary inspection plays a critical role, since they allow to identify and minimize the specific hazards for human health. Through the assurance of animal well-being and through the ante and post-mortem inspection, it is possible to guarantee that products of animal origin reach the consumer in a safe way. Mainly goals of this thesis were the classification and quantification of the animal origin by-products obtained during health inspection and slaughter operations, as well as the assessment of the economic impact of these products for the slaughterhouse. A record was made for the weights of the by-products obtained monthly through the slaughtered species in Mafra´s Regional Slaughterhouse, bovine, equine, ovine and caprine, during the internship period from February to July 2015. During this period, it was possible to determine that, from the by-products produced over these months, more than 50% were of category 3 by-products. The amount of category 1 by-products produced varied between 31 000 kg and 45 000 kg, the amount of category 2 by-products varied between 28 000 kg and 36 000 kg and the amount of category 3 by-products varied between 67 000 kg and 86 000 kg. Economically, despite of animal origin by-products being considered just a “complementary” service, the income of category 3 by-products generates a value of 41 709 € which covers the cost associated with the elimination of category 1 and 2 by-products (37 517 €).
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Cassoli, Laerte Dagher. "Validação da metodologia de infravermelho com transformada de Fourier para identificação de adulteração em leite cru." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-20102010-165655/.
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Objetivou-se avaliar a utilização da metodologia de infravermelho com transformada de Fourier (IVTF) na identificação de adulteração em leite cru. O objetivo no primeiro estudo foio de desenvolver calibração para identificação de adulteração através da comparação do espectro de leite adulterado com um espectro de referência para leite cru. Para construção do espectro referência foram coletadas 800 amostras de diferentes fazendas localizadas na região de estudo no período de agosto de 2009 a março de 2010. Através da análise de componentes principais, foram desenvolvidas oito calibrações com diferentes números de fatores (componentes principais). Para validação das diferentes calibrações, foram coletadas outras 100 amostras da mesma região de estudo. As amostras foram adulteradas com três diferentes adulterantes geralmente utilizados na adulteração do leite cru sendo eles: bicarbonato de sódio (BS), citrato de sódio (CS) e soro de queijo (SO). Para cada adulterante foram utilizadas três diferentes concentrações (BS: 0,05, 0,10 e 0,25 %; CS: 0,025, 0,050 e 0,075% e SO: 5, 10 e 20%). Para avaliação do desempenho das calibrações foram calculadas a especificidade e a sensibilidade para cada adulterante e respectivas concentrações. A especificidade foi de 92,9% na calibração com 12 fatores. Já a sensibilidade variou em função do adulterante, concentração e número de fatores. Todas as amostras adulteradas com bicarbonato foram identificadas corretamente com modelos de 10 fatores e na concentração mais baixa (0,05%). Já para o citrato, somente amostras com concentração de 0,075% foram identificadas em 93,9% dos casos para o modelo de 18 fatores. Amostras adulteradas com soro, mesmo na concentração mais alta (20%) puderam ser identificadas em menos de 47,1% dos casos, talvez pelo tratamento espectral realizado pelo software ASM em que parte do espectro não é considerado na construção das calibrações. A comparação espectral mostrou-se uma técnica interessante para identificação de leite adulterado e que também poderia antecipar a descoberta de novos adulterantes. Já no segundo estudo o objetivo foi desenvolver calibrações para determinação da concentração dos adulterantes bicarbonato de sódio, citrato de sódio e soro de queijo. Para desenvolvimento das calibrações foram utilizadas as amostras adulteradas do primeiro estudo e, para validação, foram coletadas outras 60 amostras que foram novamente adulteradas. O desempenho de cada calibração foi avaliado através da acurácia (Se), limite de detecção (LD) e coeficiente de determinação (R2). Todas as calibrações apresentaram R2 superior a 0,91 com LD de 0,015%, 0,017% e 3,9% para BS, CS e SO, respectivamente. Já a acurácia foi de 0,005%, 0,009 % e 2,26% para BS, CS e SO, respectivamente. Através dos resultados obtidos neste estudo, conclui-se que a metodologia de IVTF pode ser utilizada para determinação da concentração de bicarbonato de sódio, citrato de sódio e soro de queijo em leite cru. Associada à equipamentos automatizados, é uma opção viável no monitoramento destes adulterantes, tendo o baixo custo operacional e alto desempenho analítico como características adicionais.The objective of this research was to evaluate the use of the methodology of Fourier Transform Infrared (FTIR) in identifying adulteration in raw milk. The objective of the first study was to develop scales to identify contamination by comparing the spectrum of adulterated milk with a reference spectrum for raw milk. To build the reference spectrum, 800 samples were collected from different farms located in the study area from August 2009 to March 2010. Through the analysis of principal components, eight scales with different numbers of factors (principal components) were developed. To validate the different calibrations, other 100 samples were collected from the same region of study. The samples were adulterated with three different adulterants commonly used in the adulteration of raw milk: sodium bicarbonate (SB), sodium citrate (SC) and whey (W). Each adulterant was used at three different concentrations (SB: 0.05, 0.10 and 0.25%; SC: 0.025, 0.050 and 0.075% and W: 5, 10 and 20%). To evaluate the performance of the calibrations, the specificity and sensitivity for each adulterant and its concentration were calculated. The specificity was 92.9% in the calibration with 12 factors. Sensitivity varied according to the adulterant, concentration and number of factors. All samples adulterated with bicarbonate were accurately identified in the 10-factor model and at the lowest concentration (0.05%). As for citrate, only samples at a concentration of 0.075% were identified in 93.9% of cases for the 18-factor model. Samples adulterated with whey, even at the highest concentration (20%) were identified in less than 47.1% of cases, which maybe attributed to the fact that part of the spectrum is not consideredin the spectral processing performed by ASM software. The spectral comparison proved to be an interesting technique for the identification of adulterated milk and that could also be used to discover new adulterants. In the second study, the aim was to develop calibrations for determining the concentration of sodium bicarbonate, sodium citrate and whey used as raw milk adulterants. To develop the calibrations, adulterated samples of the first study were used and, for validation, other 60 samples were collected and adulterated. The performance of each calibration was evaluated regarding accuracy (Se), detection limit (DL) and determination coefficient (R2). All calibrations presented R2 higher than 0.91 with DL of 0.015%, 0.017% and 3.9% for SB, SC and W, respectively. Accuracy was 0.005%, 0.009% and 2.26% for SB, SC and W, respectively. Results show that the FTIR methodology can be used for determining the concentration of sodium bicarbonate, sodium citrate and whey in raw milk. Associated with automated equipment, it is a feasible option for monitoring these adulterants, presenting low operational costs and high analytical performance as additional features.
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Alsaleh, Sultan Abdullah. "Investigating Riyadh's public health inspectors' ability to conduct risk-based food inspection, and their professional needs: A mixed-methods research study." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208321/1/Sultan%20Abdullah%20R_Alsaleh_Thesis.pdf.
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Globally, the responsibilities of Food Safety Inspectors have dramatically evolved in recent times. The major change is the shift from a diagnostic and traditional food safety assessment role to a proactive and risk-based evaluation, resulting in better protection from foodborne illnesses. The aim of this study was to investigate the knowledge and skills required by food inspectors in Riyadh, Saudi Arabia, that will enable continuous improvement to food safety inspection practices by using proactive and risk-based evaluation methods. The result being that the implementation of more effective food inspection practices will result in the provision of safer food for consumers.
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Willmott, Peter W. T. "Two case studies in strategic decision making and organizational performance : the Canadian Food Inspection Agency and the Food Standards Agency (U.K.) : a comparative analysis." Thesis, University of Lincoln, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427517.
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Johansson, M. Annette. "Immunosensor methods for drug residue control of food : assay design and sample matrix effects /." Uppsala : Dept. of Microbiology, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a457.pdf.
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Early, Chrystal S. "Community Risk Factors and Health Inspection Violations in Mississippi Delta Census Tracts." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7634.
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A concerning public health issue in America is about food deserts urban and rural communities that lack grocery retailers that offer affordable, nutritious, and diverse foods. Empirical evidence has shown significant associations between neighborhood disadvantage/disorder risk factors of high poverty and high percentages of ethnic minority residents with presence/ absence of healthy food retailers in food deserts. The purpose of this quantitative correlational study, framed by the disparities in food safety conceptual model, was to examine if county-level poverty, number of African American residents, number of elderly (i.e., age 65 or older) residents, vehicle ownership, and crime rates were significantly associated with presence/absence of healthy food retail environments in a stratified random sample of 160 Mississippi Delta Region counties. Variables were measured using SPSS 25.0 data set from federal sources. Data were analyzed using binary logistic regression. Findings indicated that the percentage of households below poverty level was significantly associated with absence of healthy food retailers, (Wald X2 = 7.62, p = .006). Logistic regression findings further showed that the county percentage of households with at least one vehicle was significantly associated with the presence of healthy food retailers, (Wald X2= 8.75, p = .003). As a result of this study, residents of the Mississippi Delta Region (MDR) may begin to petition their local, county, and state governments to enhance access to healthy foods, and in turn, such government institutions may develop programs and initiatives that help to make healthy foods affordable.
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Jönsson, Gustav, and Hanna Lindhé. "Egenkontroll i livsmedelsbranschen utifrån verksamheternas perspektiv : en kvalitativ studie." Thesis, Högskolan Kristianstad, Sektionen för lärande och miljö, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-13194.
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Verksamhetsutövare inom livsmedelsbranschen har ett ansvarar för att den mat som producerats är säker. År 2009 gjordes ändringar i den svenska livsmedelslagen där bland annat kraven försvann på att verksamhetsutövare måste ha skriftliga rutiner och dokumentation (Lindblad, Westöö, Lindqvist, Hjertqvist & Andersson, 2009). Oavsett om verksamhetsutövarna har skriftliga rutiner och dokumentation eller inte måste de kunna bevisa att de har tillräcklig kunskap för att arbeta med livsmedelshantering. Genom ett fungerande system för egenkontroll, alltså en egen kontroll av verksamheten, skapas säkra livsmedel och risken för matförgiftning minskar (Israelsson, 2006). Syftet med denna studie är att undersöka verksamhetsutövarna inom livsmedelsbranschens uppfattning om egenkontroll. Denna studie bygger på kvalitativa semi-strukturerade intervjuer med sex stycken verksamhetsutövare inom livsmedelsbranschen och en livsmedelsinspektör. Urvalet av respondenter till studien begränsades till en kommun i södra Sverige. Samtliga intervjuer spelades in och transkriberades sedan ordagrant för analysering. Respondenterna i studien såg positivt på förändringen i dagens lagstiftning, men många hade ändå valt att ha kvar sina gamla egenkontrollprogram. De såg det som en säkerhet och trygghet i att kunna gå tillbaka till den och luta sig mot de rutiner som fanns nedskrivna.Food businesses are responsible to ensure that the food they produce is safe. In 2009 changes were made to the Swedish laws on food safety, with one of the resulting changes being that the previous requirements of having written procedures and documentation disappeared (Lindblad, Westöö, Lindqvist, Hjertqvist & Andersson, 2009). However, whether a business has written procedures and documentation or not, it must still be able to prove that it and its employees have enough knowledge to safely work with food. Through a functioning system of self-monitoring, the risk of food poisoning decreases (Israelsson, 2006). The aim of this study is to investigate the food business' opinion regarding the self-monitoring system. This study is based on qualitative semi-structured interviews with six operators within the food business as well as one food inspector. The respondents to the study were geographically limited to southern Sweden. All the interviews were recorded and transcribed verbatim for analysis. The respondents in this study were positive to the change in current law, but many still chosen to retain their old self-monitoring system. They saw it as a safety measure as well as being beneficial when it comes to going back and look at the documented routines.