| 1. |
- Kent, M., et al.
(författare)
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Composition of foods including added water using microwave dielectric spectra
- 2001
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Ingår i: Food Control. - 0956-7135 .- 1873-7129. ; 12:7, s. 467-482
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Tidskriftsartikel (refereegranskat)abstract
- The added water content of fresh and untreated pork, poultry, fish and prawns was adjusted either by dipping in polyphosphate and salt solutions of known concentrations for controlled periods, or by injection (pork) with polyphosphate and salt solutions. Mixtures were prepared from treated and untreated fish and other foods (milk and flour). Liquid uptake was determined by the weight gain of samples. The proximate composition of the samples was determined: water, fat, protein, NaCl and phosphorus (for polyphosphate content). Complex dielectric spectra of each product were measured at known temperatures and at 31 frequencies in the range 0.2-12 GHz using an automatic network analyser (ANA) and a 3.0 mm open-ended coaxial sensor. The spectra were subjected to various procedures. Principal component analysis (PCA) using the individual complex components. Regression of the composition data against the principal components to obtain prediction formulae for composition including liquid uptake (internal cross-validation). Regression of the composition data against raw spectral data and against other composition variables to obtain similar formulae. In order to design a simpler instrument, the effect on accuracy was studied of reducing the number of frequencies in the spectrum and its range. The slight loss of accuracy engendered by using only five or six frequencies was acceptable. The accuracy of the method in predicting liquid uptake and composition was good. Using one of the compositional variables in the calibration made it equivalent to accuracy obtained by proximate analysis, which was the limiting factor. Measurements on solutions of glycerol, NaCl and water with precisely known composition demonstrated that the intrinsic accuracy of the instrument was far better. A prototype instrument was built and validated using samples of prawns and herring. © 2001 Elsevier Science Ltd.
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| 2. |
- Almqvist, Viktor, et al.
(författare)
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Reliability of remote post-mortem veterinary meat inspections in pigs using augmented-reality live-stream video software
- 2021
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 125
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Tidskriftsartikel (refereegranskat)abstract
- Official meat inspections at remotely situated, small-scale slaughter houses and game handlings establishments fare associated with a relatively high cost of official control per inspected animal. By performing veterinary meat inspections via live-streamed video, this cost could be lowered. We aimed to evaluate how veterinary meat inspections at slaughter can be conducted remotely with the help of a camera-equipped non-veterinary technician on site. Specialized software and augmented reality technology were used. The remote inspection was compared to standard on-site veterinary meat inspection at a large-scale slaughter plant for pigs in Sweden during 2019. The remote and on-site inspectors recorded findings in 400 carcasses and organs arrested for further inspection. The comparison was based primarily on percentage agreement, Cohen?s kappa and prevalence- and bias-adjusted kappa (PABAK) as measures of agreement and reliability. The remote method was shown to display a high level of agreement for clear, easily distinguished findings (e.g. tail lesions, with an agreement of 92.3%, Cohen?s kappa of 0.77 and PABAK of 0.85). For more vague findings and subjective decisions, the performance was slightly lower (e.g. whether or not to condemn a carcass completely, with agreement 75.2%, Cohen?s kappa 0.32 and PABAK 0.50). Remote inspection appears to constitute a viable alternative for post-mortem meat inspection in pigs, given a sufficiently standardized method of inspection and sufficient inspection times. The performance of remote inspection probably depends on which persons use the method.
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| 3. |
- Alsanius, Beatrix
(författare)
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Cassia oil for controlling plant and human pathogens on fresh strawberries
- 2012
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 28, s. 157–162-
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Tidskriftsartikel (refereegranskat)abstract
- The inhibitory effects of cassia oil on the human pathogen Escherichia coli serotype O157:H7 and the plant pathogen Botrytis cinerea were tested in vitro at different concentrations (200-800 ppm). Cassia oil exhibited antibacterial and antifungal activity against both pathogens. Cassia oil at 400-800 ppm inhibited the growth of E. coli O157:H7 in vitro and on the surface of treated strawberries. Cassia oil also completely inhibited the growth of B. cinerea at 400-800 ppm. Spore germination and germ tube elongation of the pathogens in potato dextrose broth were strongly inhibited in the presence of 100 ppm cassia oil. Cassia oil at all concentrations reduced the percentage of decayed strawberries. Experiments on reducing the development of natural decay in strawberries gave similar results. None of the quality parameters tested (colour, total soluble solids, pH, total acidity and ascorbic acid) was affected by cassia oil treatment. Storage experiments on strawberry showed that the percentage weight loss was reduced by cassia oil treatment. Hence, cassia oil could be an alternative to synthetic chemicals for controlling human and plant pathogens on fruits such as strawberries during postharvest and storage.
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| 4. |
- Atapour, Masoud, et al.
(författare)
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Metal release from stainless steel 316L in whey protein - And simulated milk solutions under static and stirring conditions
- 2019
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Ingår i: Food Control. - : ELSEVIER SCI LTD. - 0956-7135 .- 1873-7129. ; 101, s. 163-172
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Tidskriftsartikel (refereegranskat)abstract
- Stainless steel is an important transport and processing contact material for bovine milk and dairy products. Release (migration) of metals, ions, complexes or wear debris/particles, and metal-induced protein aggregation in such environments are hence important to consider both from a corrosion and food safety perspective. This study aims on investigating the release of iron (Fe), chromium (Cr), and nickel (Ni) from AISI 316L stainless steel in contact with whey protein solutions relevant for protein drinks, and on how the whey proteins are influenced by stirring with a magnetic stir bar and metal release. Mechanistic insight is gained by parallel investigations of metal release from two reference non-protein containing solutions, a metal-complexing (citrate-containing) simulated milk solution (SMS) and a low complexing phosphate buffered saline solution (PBS). All immersion exposures were conducted at pH 6.8 for 0.5, 4, 24 and 48 hat room temperature at static and stirring conditions. All solutions and samples were investigated using different chemical, spectroscopic, microscopic, and electrochemical methods. Significantly higher amounts of Fe, Cr, and Ni were released into the whey protein solution (80 g/L) as compared to SMS and PBS. Strong enrichment of Cr in the surface oxide and reduction of the surface oxide thickness were associated with a higher amount of Ni release in the metal-complexing solutions (SMS and whey protein) compared with PBS. Stirring conditions resulted in higher amounts of metal release, enrichment of Cr in the surface oxide, and clear signs of wear of the 316L surface in all solutions compared to static conditions. The wear mechanism in the whey protein solution was different as compared to corresponding processes in SMS and PBS, involving an etching-like process and larger-sized wear debris. Electrochemical measurements at static conditions confirmed observed differences between the solutions, with the lowest corrosion resistance observed for coupons exposed in the whey protein solution, followed by SMS and PBS. Released metals in solution from the 316L coupons in contact with the whey protein solution resulted in enhanced rates of protein aggregation and precipitation of protein aggregates from solution. Further studies should be made to investigate other relevant test conditions and assess toxicological risks.
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| 5. |
- Barimah, Alberta Osei, et al.
(författare)
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Sensitive label-free Cu2O/Ag fused chemometrics SERS sensor for rapid detection of total arsenic in tea
- 2021
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Ingår i: Food Control. - : Elsevier. - 0956-7135 .- 1873-7129. ; 130
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Tidskriftsartikel (refereegranskat)abstract
- Arsenic (As) is one of the toxic, persistent, and lethal heavy metalloids and requires rapid, less costly, and sensitive detection methods. This study proposed a label-free cuprous oxide/silver (Cu2O/Ag) surface-enhanced Raman scattering (SERS) nanoprobe to detect total As in tea. Different total As spiked tea concentrations were mixed with the Cu2O/Ag SERS nanoprobe for the SERS detection. Quantitative models were established for predicting the total As in tea by comparatively applying chemometric algorithms. Amongst the algorithms, competitive adaptive reweighted sampling partial least squares (CARS-PLS) optimized the most effective spectral variables to predict the total As in tea efficiently. The CARS-PLS gave the highest correlation coefficient value (R-p = 0.9935), very low root means square error (RMSEP = 0.0496 mu g g(-1)) in the prediction set and recorded the highest RPD value of 8.819. The proposed nanoprobe achieved a lower detection limit (0.00561 mu g g(-1)), excellent selectivity, satisfactory reproducibility, and stability. No significant difference was recorded when the performance of the Cu2O/Ag total As SERS sensor was compared with the inductively coupled plasma mass spectrometry (ICP-MS) method. Therefore, this developed Cu2O/Ag coupled chemometrics SERS sensing method could be used to efficiently determine, quantify, and predict total As in tea to promote monitoring of heavy metal contaminants.
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| 6. |
- Basu, Santanu
(författare)
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Predictive microbial growth modelling for an effective shelf-life extension strategy of Chhana (Indian cottage cheese)
- 2023
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 149
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Tidskriftsartikel (refereegranskat)abstract
- This study aims towards understanding microbial growth dynamics in Chhana (Indian cottage cheese) using three different primary models (viz., Logistic, Gompertz, and Barayni) for development of secondary models and relating it with the intrinsic chemical compositional properties of the samples under different storage conditions. For this purpose, Chhana was prepared in a commercial setup and shelf-life studies were performed in isothermal conditions 8 degrees C (with/without im-mersion in whey), 20 degrees C, 37 degrees C and dynamic refrigerated (8 degrees C) condition with immersion in whey. Immersion in whey was effective for extending the shelf life of Chhana. Barayni model was found better than the other models (0.94 0.99). Despite high correlation values all three models presented their own limitations which was then successfully overcome by novel application of three phased linearized growth model. Differential secondary models were successfully developed, and goodness of fit was evaluated with RMSE (0.032-0.084), and prediction rates achieved as high as 96.2%. The developed methods of data analysis and methods of modelling wild microbial population presented in this research would be beneficial in developing valuable insights for estimation/prediction of product shelf-life in a real-life industrial situation.
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| 7. |
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| 8. |
- Bosona, Techane, et al.
(författare)
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Food traceability as an integral part of logistics management in food and agricultural supply chain
- 2013
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 33, s. 32-48
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Tidskriftsartikel (refereegranskat)abstract
- The contemporary food supply chain (FSC) should adequately provide information that consumers and other concerned bodies need to know such as variety of the food attributes, country of origin, animal welfare, and genetic engineering related issues. For this, effective food traceability system (FTS) is important. The objective of this study was to conduct a comprehensive literature review on food traceability issues. About 74 studies, mainly focusing on food traceability issues and published during 2000–2013, were reviewed. Based on the review results, the definition, driving forces, barriers in developing and implementing FTSs, benefits, traceability technologies, improvements, and performances of FTSs have been identified and discussed. Considering FTS as an integral part of logistics management, new conceptual definition of FTS has been provided. This review has pointed out that the issue of developing effective and full chain FTS is quite complex in nature as it requires a deeper understanding of real processes from different perspectives such as economic, legal, technological, and social issues. Therefore, future researches (recommended here) on traceability should focus on: integration of traceability activities with food logistics activities; technological aspects of FTSs; the linkage between traceability system and food production units; standardization of data capturing and information exchange; awareness creation strategies; continuity of information flow and effective communication of traceability information to consumers and other stakeholders; the linkage between different drivers of FTS; improvement strategies of FTS; and development of performance evaluation frameworks for FTSs.
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| 9. |
- Concina, Isabella, et al.
(författare)
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Early detection of microbial contamination in processed tomatoes by electronic nose
- 2009
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 20:10, s. 873-880
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Tidskriftsartikel (refereegranskat)abstract
- Microbial contamination can easily affect processed tomato, thus determining both organoleptic adulterations and potential health risks for customers. Innovative techniques for a rapid and reliable diagnose of spoilage, such as electronic nose technology, are highly requested in order to guarantee food safety and to improve production. In this work canned peeled tomatoes were artificially spoiled with different kinds of microbial flora and then were analyzed by means of an electronic nose based on thin film metal oxide gas sensors. Preliminary analyses by dynamic-headspace gas chromatographic-mass spectrometry showed significant differences in the semi-quantitative volatile compounds profile of spoiled tomato samples just after few hours from contamination, thus suggesting to employ the electronic nose for an early diagnose of microbial presence. The electronic nose was indeed able to reveal contamination, even at early stages depending on the type of contaminant (e.g. for Saccharomyces cerevisiae and Escherichia coli), and to recognize spoiled tomato samples with good classification performances.
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| 10. |
- Ekner, Holly, et al.
(författare)
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Determination of polycyclic aromatic hydrocarbons in commercial olive oils by HPLC/GC/MS – Occurrence, composition and sources
- 2022
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Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 132
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Tidskriftsartikel (refereegranskat)abstract
- Polycyclic aromatic hydrocarbons (PAHs) are a large class of organic compounds produced from incomplete combustion. Many PAHs are mutagenic and some are carcinogenic and pose a health risk to humans. Dietary intake of PAHs is a major route of exposure, where fats and edible oils are important contributors to overall dietary PAH exposure. Composed of hundreds of individual compounds as a complex mixture, only 16 PAHs are typically monitored in food and the environment.In this present study we analyzed 16 commercial olive oil samples from different countries of origin and type (virgin or refined oil) for their content of 45 PAHs using a high-performance liquid chromatograph coupled to a gas chromatograph with a mass spectrometric detector. The content of the 45 PAHs varied between 9.17–94.7 μg/kg (median: 30.1 μg/kg) in the different olive oil samples. Only one sample didn't meet the regulatory threshold levels for PAHs.The compositional profile of PAHs across the olive oil samples showed a high abundance of PAHs of lower molecular weights, and a large contribution of alkylated PAHs regardless of olive oil type. Direct contact with diesel exhaust emissions from mechanical harvesters has previously shown to affect PAH levels in olive oils. Using diagnostic PAH ratios, biomass/coal combustion and/or petroleum/fossil fuel combustion were indicated as important sources. Source apportionment by positive matrix factorization revealed diesel exhaust emission and biomass combustion as the two major sources of PAHs followed by traffic emissions. This suggests that air quality may have a considerable impact on pollution levels in olive oils and thus indirectly affect dietary exposure.
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