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https://www.readbyqxmd.com/read/28239213/effect-of-proteolytic-modification-on-texture-and-mastication-of-heat-treated-egg-white-gels
#1
Junko Funaki, Michiko Minami, Sachie Abe, Reiko Ueda, Wakako Eto, Kenji Kugino, Mutsuko Kugino, Keiko Abe, Kiyoshi Toko, Tomiko Asakura
: Raw egg white undergoes sol-gel transition by heat treatment, which changes it to an elastic gel. Here, protease treatment to render a new texture to heated egg white gel was applied. Protease-treated gels exhibited ductile flow without obvious rupture points. Transmission electron microscopy analysis showed that in protease-treated gels, protein aggregates were distributed more homogeneously compared with that observed in the untreated control, probably because ovalbumin was digested into small peptides as revealed by SDS-PAGE...
February 2017: Journal of Food Processing and Preservation
https://www.readbyqxmd.com/read/28237311/residues-of-organochlorine-pesticides-in-surface-soil-and-raw-foods-from-rural-areas-of-the-republic-of-tajikistan
#2
Mace G Barron, Zebunisso J Ashurova, Mukhamadcho A Kukaniev, Hakbarqul K Avloev, Karim K Khaidarov, Jamshed N Jamshedov, Oygul S Rahmatullova, Sunbula S Atolikshoeva, Sakina S Mamadshova, Oksana Manzenyuk
The central Asian Republic of Tajikistan has been an area of extensive historical agricultural pesticide use as well as large scale burials of banned chlorinated insecticides. The current investigation was a four year study of legacy organochlorine pesticides in surface soil and raw foods in four rural areas of Tajikistan. Study areas included the pesticide burial sites of Konibodom and Vakhsh, and family farms of Garm and Chimbuloq villages. These areas were selected to represent a diversity of pesticide disposal histories and to allow assessment of local pesticide contamination in Tajikistan...
February 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28231135/changes-in-food-intake-in-australia-comparing-the-1995-and-2011-national-nutrition-survey-results-disaggregated-into-basic-foods
#3
Bradley Ridoutt, Danielle Baird, Kathryn Bastiaans, Gilly Hendrie, Malcolm Riley, Peerasak Sanguansri, Julie Syrette, Manny Noakes
As nations seek to address obesity and diet-related chronic disease, understanding shifts in food intake over time is an imperative. However, quantifying intake of basic foods is not straightforward because of the diversity of raw and cooked wholefoods, processed foods and mixed dishes actually consumed. In this study, data from the Australian national nutrition surveys of 1995 and 2011, each involving more than 12,000 individuals and covering more than 4500 separate foods, were coherently disaggregated into basic foods, with cooking and processing factors applied where necessary...
May 25, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231124/food-safety-impacts-from-post-harvest-processing-procedures-of-molluscan-shellfish
#4
REVIEW
George L Baker
Post-harvest Processing (PHP) methods are viable food processing methods employed to reduce human pathogens in molluscan shellfish that would normally be consumed raw, such as raw oysters on the half-shell. Efficacy of human pathogen reduction associated with PHP varies with respect to time, temperature, salinity, pressure, and process exposure. Regulatory requirements and PHP molluscan shellfish quality implications are major considerations for PHP usage. Food safety impacts associated with PHP of molluscan shellfish vary in their efficacy and may have synergistic outcomes when combined...
April 18, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28221957/ochratoxin-a-concentrations-in-a-variety-of-grain-based-and-non-grain-based-foods-on-the-canadian-retail-market-from-2009-to-2014
#5
Beata Kolakowski, Sarah M O'Rourke, Henri P Bietlot, Karl Kurz, Barbara Aweryn
The extent of ochratoxin A (OTA) contamination of domestically produced foods sold across Canada was determined from 2009 to 2014 with sampling and testing occurring each fiscal year. Cereal-based, fruit-based, and soy-based food samples (n = 6,857) were analyzed. Almost half of the samples (3,200; 47%) did not contain detectable concentrations of OTA. The remaining 3,657 samples contained OTA at 0.040 to 631 ng/g. Wheat, oats, milled products of other grains (such as rye and buckwheat), and to a lesser extent corn products and their derived foods were the most significant potential sources of OTA exposure for the Canadian population...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221928/rapid-identification-of-shiga-toxin-producing-escherichia-coli-o-serogroups-from-fresh-produce-and-raw-milk-enrichment-cultures-by-luminex-bead-based-suspension-array
#6
Julie A Kase, Anna Maounounen-Laasri, Andrew Lin
The U.S. Food and Drug Administration's Bacteriological Analytical Manual (BAM) Chapter 4a describes a Luminex microbead-based suspension array used to screen colonies for 11 clinically relevant Shiga toxin-producing Escherichia coli (STEC) serogroups: O26, O45, O91, O103, O104, O111, O113, O121, O128, O145, and O157. We evaluated the usefulness of this method to identify STEC-positive enrichment samples before agar plating. Twelve E. coli strains were added to three types of fresh produce (bagged baby spinach, alfalfa sprouts, and cilantro) at levels near the detection limit of the test...
September 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221920/prevalence-and-molecular-characterization-of-methicillin-resistant-staphylococcus-aureus-in-foods-of-animal-origin-turkey
#7
Belgin Siiriken, Tuba Yildirim, Akif Koray Güney, Irfan Erol, Belma Durupinar
In the present study, 175 coagulase-positive Staphylococcus (CPS) isolates recovered from samples of beef (n = 110), raw milk n = 56), and fish (n = 9) were analyzed for methicillin resistance using MIC and PCR assays. Methicillin-resistant (MR) Staphylococcus aureus (SA) isolates were then characterized using pulsed-field gel electrophoresis (PFGE). According to findings, 62 (35.4%) of the isolates (44 from beef, 9 from milk, and 9 from fish) were identified as S. aureus based on the presence of the nuc gene...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221915/nonuniformity-of-temperatures-in-microwave-steam-heating-of-lobster-tail
#8
Gregory J Fleischman
The biennial Conference for Food Protection provides a formal process for all interested parties to influence food safety guidance. At a recent conference, an issue was raised culminating in a formal request to the U.S. Food and Drug Administration to change its Food Code recommendation for safe cooking of seafood using microwave energy when steaming was also employed. The request was to treat microwave steam cooked seafood as a conventionally cooked raw animal product rather than a microwave cooked product, for which the safe cooking recommendation is more extensive owing to the complex temperature distributions in microwave heating...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221913/an-immunoassay-for-quantification-of-contamination-by-raw-meat-juice-on-food-contact-surfaces
#9
Fur-Chi Chen, Sandria Godwin, Edgar Chambers
Raw chicken products often are contaminated with Salmonella and Campylobacter , which can be transmitted from packages to contact surfaces. Raw meat juices from these packages also provide potential media for cross-contamination. There are limited quantitative data on the levels of consumer exposure to raw meat juice during shopping for and handling of chicken products. An exposure assessment is needed to quantify the levels of transmission and to assess the risk. An enzyme-linked immunosorbent assay (ELISA) was developed and validated for quantitative detection of raw meat juice on hands and various food contact surfaces...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221898/foodborne-disease-outbreaks-associated-with-organic-foods-in-the-united-states
#10
R Reid Harvey, Christine M Zakhour, L Hannah Gould
Consumer demand for organically produced foods is increasing in the United States as well as globally. Consumer perception often credits organic foods as being safer than conventionally produced foods, although organic standards do not directly address safety issues such as microbial or chemical hazards. We reviewed outbreaks reported to the Centers for Disease Control and Prevention's Foodborne Disease Outbreak Surveillance System where the implicated food was reported to be organic. Information collected for each outbreak included the year, state, number of illnesses, pathogen, and implicated food...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221891/microbial-quality-safety-and-pathogen-detection-by-using-quantitative-pcr-of-raw-salad-vegetables-sold-in-dhanbad-city-india
#11
Sujeet K Mritunjay, Vipin Kumar
Consumption of ready-to-eat fresh vegetables has increased worldwide, with a consequent increase in outbreaks caused by foodborne pathogens. In the Indian subcontinent, raw fresh vegetables are usually consumed without washing or other decontamination procedures, thereby leading to new food safety threats. In this study, the microbiological quality and pathogenic profile of raw salad vegetables was evaluated through standard protocols. In total, 480 samples (60 each of eight different salad vegetables) of cucumber, tomato, carrot, coriander, cabbage, beetroot, radish, and spinach were collected from different locations in Dhanbad, a city famous for its coal fields and often called the "Coal Capital of India...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221890/enhanced-control-of-listeria-monocytogenes-by-enterococcus-faecium-ke82-a-multiple-enterocin-producing-strain-in-different-milk-environments
#12
Elpiniki Vandera, Alexandra Lianou, Athanasia Kakouri, Jinbo Feng, Anna-Irini Koukkou, John Samelis
Enterococcus faecium KE82, isolated from traditional Greek Graviera cheese, was identified in pure broth cultures in vitro as a multiple enterocin-producing bacterial strain possessing the structural entA, entB, and entP enterocin genes. E. faecium KE82 was further assessed for in situ antilisterial activity in raw milk (RM) and commercially thermized milk (TM; 63°C for 30 s) in the presence of the indigenous microbiota and in sterile raw milk (SRM; 121°C for 5 min) with or without the addition of two commercial starter culture (CSC) strains Streptococcus thermophilus and Lactococcus lactis ...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221882/microbial-performance-of-food-safety-control-and-assurance-activities-in-a-fresh-produce-processing-sector-measured-using-a-microbial-assessment-scheme-and-statistical-modeling
#13
Patrick Murigu Kamau Njage, Chemutai Tonui Sawe, Cecilia Moraa Onyango, I Habib, Edmund Njeru Njagi, Marc Aerts, Geert Molenberghs
Current approaches such as inspections, audits, and end product testing cannot detect the distribution and dynamics of microbial contamination. Despite the implementation of current food safety management systems, foodborne outbreaks linked to fresh produce continue to be reported. A microbial assessment scheme and statistical modeling were used to systematically assess the microbial performance of core control and assurance activities in five Kenyan fresh produce processing and export companies. Generalized linear mixed models and correlated random-effects joint models for multivariate clustered data followed by empirical Bayes estimates enabled the analysis of the probability of contamination across critical sampling locations (CSLs) and factories as a random effect...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221849/restaurant-policies-and-practices-for-serving-raw-fish-in-minnesota
#14
Nicole Hedeen
The number of restaurants serving sushi within Minnesota is continuously increasing. The practices and protocols of serving raw fish are complex and require detailed planning to ensure that food served to patrons will not cause illness. Although the popularity of sushi is increasing, there is a lack of research on food safety issues pertaining to preparation of raw fish and sushi rice. To address this gap, the Minnesota Department of Health Environmental Health Specialists Network Food program collected descriptive data on restaurant practices and policies concerning the service of raw fish and sushi rice in 40 Minnesota restaurants...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221845/occurrence-and-dispersal-of-indicator-bacteria-on-cucumbers-grown-horizontally-or-vertically-on-various-mulch-types
#15
Shirley A Micallef, Mary Theresa Callahan, Sivaranjani Pagadala
No data exist on the impact of cultivation practices on food safety risks associated with cucumber. Cucumbers are typically grown horizontally over a mulch cover, with fruit touching the ground, but this vining plant grows well in vertical systems. To assess whether production system affects bacterial dispersal onto plants, field trials were conducted over 2 years. Cucumber cultivar 'Marketmore 76' was grown horizontally on plastic, straw, or bare ground or vertically on trellises installed on bare ground in soil previously amended with raw dairy manure...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221837/environmental-occurrence-and-antibiotic-susceptibility-profile-of-listeria-monocytogenes-at-a-slaughterhouse-raw-processing-plant-in-romania
#16
Claudia Sala, Adriana Morar, Emil Tîrziu, Ileana Nichita, Mirela Imre, Kálmán Imre
This survey was conducted to investigate the occurrence and antimicrobial susceptibility of Listeria monocytogenes isolates in the environment of a pig slaughterhouse raw processing plant complex in western Romania. A total of 97 environmental samples from food contact (n = 60) and nonfood contact (n = 37) surfaces were examined with standard methods. The susceptibility of the isolates to 17 antimicrobial agents was determined with the VITEK 2 automated system. Overall, 25 (25.8%) samples were positive for L...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28216165/isolation-and-identification-of-new-chemical-constituents-from-chinese-chive-allium-tuberosum-and-toxicological-evaluation-of-raw-and-cooked-chinese-chive
#17
Quan Gao, Xia-Bing Li, Jia Sun, Er-Dong Xia, Feng Tang, Hai-Qun Cao, Hang Xun
Chinese chive (jiu cai) is a popular vegetable in China and has a unique flavour and aroma. The molecular basis of the characteristic fragrance and nutritional properties of Chinese chive has not been previously identified. Sequential extractions in a series of solvents and high-performance liquid chromatography were used to isolate 40 compounds from Chinese chive. The compounds were identified based on high-resolution electrospray ionization mass spectra, 1D and 2D nuclear magnetic resonance techniques, and circular dichroism spectra...
February 20, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28213017/inactivation-of-salmonella-spp-pathogenic-escherichia-coli-staphylococcus-spp-or-listeria-monocytogenes-in-chicken-purge-or-skin-using-a-405-nm-led-array
#18
Christopher Sommers, Nereus W Gunther, Shiowshuh Sheen
Raw poultry are sometimes contaminated with foodborne pathogens, which can lead to illness in humans. In recent years research has focused on a variety of light technologies to decontaminate food and food contact surfaces during meat and poultry processing. In this study we evaluated the ability of 405-nm light generated from an LED array to inactivate multi-isolate cocktails of either Salmonella spp., pathogenic Escherichia coli, Staphylococcus spp., or Listeria monocytogenes suspended in chicken purge or skin...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28208613/structure-antioxidative-and-anti-inflammatory-activity-relationships-of-purpurin-and-related-anthraquinones-in-chemical-and-cell-assays
#19
Woo Nam, Sung Phil Kim, Seok Hyun Nam, Mendel Friedman
Anthraquinone (9,10-anthraquinone) and several hydroxy derivatives, including purpurin (1,2,4-trihydroxyanthraquinone), anthrarufin (1,5-dihydroxyanthraquinone), and chrysazin (1,8-dihydroxyanthraquinone), were evaluated for antioxidative and anti-inflammatory activities in chemical assays and mammalian cells (murine macrophage RAW 264.7 cells). Several tests were used to assess their activities: 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical; ABTS radical cation; hydrogen peroxide scavenging; reduction of potassium ferricyanide; chelation of ferrous ions; inhibition of lipid peroxidation; inhibition of nitric oxide generation; scavenging of the intracellular hydroxyl radical; expression of NLRP3 polypeptide for inflammasome assembly; and quantitation of proinflammatory cytokine interleukin 1β (IL-1β) for inflammasome activation...
February 10, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28207311/prevalence-of-salmonella-in-cashews-hazelnuts-macadamia-nuts-pecans-pine-nuts-and-walnuts-in-the-united-states
#20
Guodong Zhang, Lijun Hu, David Melka, Hua Wang, Anna Laasri, Eric W Brown, Errol Strain, Marc Allard, Vincent K Bunning, Steven M Musser, Rhoma Johnson, Sofia M Santillana Farakos, Virginia N Scott, Régis Pouillot, Jane M Van Doren, Thomas S Hammack
Nuts have been identified as a vector for salmonellosis. The objective of this project was to estimate the prevalence and contamination level of Salmonella in raw tree nuts (cashews, pecans, hazelnuts, macadamia nuts, pine nuts, and walnuts) at retail markets in the United States. A total of 3,656 samples of six types of tree nuts were collected from different types of retail stores and markets nationwide between October 2014 and October 2015. These samples were analyzed using a modified version of the Salmonella culture method from the U...
February 16, 2017: Journal of Food Protection
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