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Registros recuperados: 11
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Assessment of the impact of formalin treatment on the quality and shelf life of mango CIGR Journal
Shiraj-Um-Monira, Syeeda.
This study was conducted to observe the effect of formalin application on the post-harvest quality and shelf life of mango. Mango samples were treated with different concentrations of formalin solutions (10, 100 and 1000 ppm) in two different modes (dipping and spraying) and stored for seven days at ambient condition. Physical characteristics, such as weight loss, color, texture and shrinkage and residual formalin content were observed at every alternate day during storage period. Formalin treatment (dipping and spraying) did not bring up any positive effect in increasing the shelf life of mango. Rather treated with higher concentration of formalin solution (10 ppm<100 ppm<1000 ppm) caused internal and external deterioration. Residual formalin...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Post harvest technology Formalin; Adulteration; Post-harvest quality; Shelf-life; Mango.
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5118
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Brazilian ground beef authentication by multiplex polymerase chain reaction Ciência Rural
Oliveira,Andrey Carlos do Sacramento de; Pedroso,Silvia Cristina da Silva; Cardilli,Diogo José; Leite,Fábio Pereira Leivas; Ferreira,Gabrielle Virgínia Lopes; Silva,Andréia Silva da; Roos,Talita Bandeira; Moraes,Carina Martins de; Sousa,Roberta Sales; Monteiro,Roseli do Socorro Dias.
ABSTRACT: The aim of the present study was to assess the efficacy ofmultiplex PCR in detecting the adulterationof commercially available ground beefvia addition and/orsubstitution ofground buffalo meat. Experimentally adulterated ground beefsamples were prepared in triplicate, and dilutions of DNA from Bos taurus and Bubalusbubalis were prepared to determine the detection limit of the method. Concurrently, 91 ground meatsamples sold as “ground beef” were collected from differentstores in northern Brazil andanalyzed bymultiplex PCR. Buffalo DNA was detected in 17.5% of the collected ground meat samples.Our results showed that multiplex PCR is an efficient method for detectingthe incorporation of groundbuffalo meatatpercentages ranging from 10 to 100% and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Species identification; Bos taurus; Bubalusbubalis; DNA; Adulteration.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200652
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Carbon isotope analysis in apple nectar beverages Ciênc. Tecnol. Aliment.
Figueira,Ricardo; Venturini Filho,Waldemar Gastoni; Ducatti,Carlos.
The aims of this study were to use the isotope analysis method to quantify the carbon of C3 photosynthetic cycle in commercial apple nectars and to determine the legal limit to identify the beverages that do not conform to the safety standards established by the Brazilian Ministry of Agriculture, Livestock and Food Supply. These beverages (apple nectars) were produced in the laboratory according to the Brazilian legislation. Adulterated nectars were also produced with an amount of pulp juice below the permitted threshold limit value. The δ13C values of the apple nectars and their fractions (pulp and purified sugar) were measured to quantify the C3 source percentage. In order to demonstrate the existence of adulteration, the values found were compared to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Legislation; Adulteration; IRMS.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000100006
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Electrophoretic analisys to detect and quantify additional whey in milk and dairy beverages Ciênc. Tecnol. Aliment.
SOUZA,Elizabeth Maria Talá de; ARRUDA,Sandra Fernandes; BRANDÃO,Patrícia Oliveira; SIQUEIRA,Egle Machado de Almeida.
Polyacrylamide gel electrophoresis, SDS-PAGE system, was adjusted to detect the presence of additional whey in dairy beverages distributed in a Brazilian Government School Meals Program. Aqueous solutions of samples in 8 M urea were submitted to a polyacrylamide gel gradient (10% to 18%). Gel scans from electrophoresis patterns of previously adulterated milk samples showed that caseins peak areas decreased while peak areas of beta -lactoglobulin plus alpha -lactalbumin increased as the percentage of raw milk powder replaced by whey powder increased. The relative densitometer areas of caseins or beta -lactoglobulin plus alpha -lactalbumin plotted against the percentage of whey added to the raw milk showed a linear correlation coefficient square higher than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Whey; Proteins; Casein; Adulteration.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000300007
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Evaluation of cheese authenticity and proteolysis by HPLC and urea-polyacrylamide gel electrophoresis IPB - Escola Superior Agrária
Veloso, Ana C.A.; Peres, António M.; Mendonça, Álvaro; Teixeira, Natércia; Ferreira, Isabel M.P.L.V.O..
Chromatographic and electrophoretic methods have been established as useful tools in characterising cheese ripening and in the detection of milk adulteration. The purpose of this work was to evaluate casein proteolysis of cheeses made from bovine, ovine or mixtures of bovine and ovine milks, as well as ovine cheese authenticity, for 30 days of ripening by HPLC and urea–polyacrylamide gel electrophoresis. Complementary information was obtained by both techniques when applied to the study of casein proteolysis during 30 days of ripening of ovine milk cheeses, ovine milk cheeses with 10% and 20% of bovine milk and bovine milk cheeses, manufactured according to the traditional Terrincho technology. For ovine cheeses, a-casein was the fraction that showed the...
Tipo: Article Palavras-chave: Cheese; Caseins; Proteolysis; Adulteration; HPLC; Urea–PAGE.
Ano: 2004 URL: http://hdl.handle.net/10198/3230
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Food Safety and Imports: An Analysis of FDA Food-Related Import Refusal Reports AgEcon
Buzby, Jean C.; Unnevehr, Laurian J.; Roberts, Donna.
This report examines U.S. Food and Drug Administration (FDA) data on refusals of food offered for importation into the United States from 1998 to 2004. Although the data do not necessarily reflect the distribution of risk in foods, the study found that import refusals highlight food safety problems that appear to recur in trade and where the FDA has focused its import alerts, examinations (e.g., sampling), and other monitoring efforts. The data show some food industries and types of violations are consistent sources of problems both over time and in comparison with previous studies of more limited data. The three food industry groups with the most violations were vegetables (20.6 percent of total violations), fishery and seafood (20.1 percent), and fruits...
Tipo: Report Palavras-chave: Adulteration; Food imports; Food and Drug Administration (FDA); Food safety; Misbranding; Labeling; Refusal; Shipment; Violation; Food Consumption/Nutrition/Food Safety; International Relations/Trade.
Ano: 2008 URL: http://purl.umn.edu/58626
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Isotope analysis (δ13C) of pulpy whole apple juice Ciênc. Tecnol. Aliment.
Figueira,Ricardo; Venturini Filho,Waldemar Gastoni; Ducatti,Carlos; Nogueira,Andressa Milene Parente.
The objectives of this study were to develop the method of isotope analysis to quantify the carbon of C3 photosynthetic cycle in pulpy whole apple juice and to measure the legal limits based on Brazilian legislation in order to identify the beverages that do not conform to the Ministry of Agriculture, Livestock and Food Supply (MAPA). This beverage was produced in a laboratory according to the Brazilian law. Pulpy juices adulterated by the addition of sugarcane were also produced. The isotope analyses measured the relative isotope enrichment of the juices, their pulpy fractions (internal standard) and purified sugar. From those results, the quantity of C3 source was estimated by means of the isotope dilution equation. To determine the existence of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Internal standard; Isotope; Carbon; IRMS; Adulteration; Quality.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000300017
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Molecular detection of adulteration in commercial buffalo meat products by multiplex PCR assay Ciênc. Tecnol. Aliment.
WANG,Lanping; HANG,Xinru; GENG,Rongqing.
Abstract Authentication of commercial buffalo meat products has become a market concern. This study intended to develop and validate a highly species-specific multiplex PCR assay for authentication of buffalo meat products. Four pairs of species-specific primers were used to target mitochondrial cytochrome oxidase I (COI) gene. The assay generated the expected PCR products of 313, 255, 294 and 177 bp for buffalo meat, cattle meat, pork meat and duck meat, respectively. The multiplex PCR assay was sensitive enough to detect 1 pg pure DNA and 0.1% (w/w) adulterated meat under mixed matrices. Market survey revealed about 35.3% of buffalo meat products are adulterated with cattle meat, pork meat or duck meat in China. The adulteration was found in all food...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Buffalo meat; Commercial fraud; Adulteration; Multiplex PCR; Cytochrome oxidase I gene.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000200344
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Results from portable and of low cost equipment developed for detection of milk adulterations Ciênc. Tecnol. Aliment.
NASCIMENTO,Wesley William Gonçalves; SOUZA,Mariane Parma Ferreira de; VALENTE,Ana Carolina Menezes Mendonça; ANJOS,Virgílio de Carvalho dos; FURTADO,Marco Antônio Moreira; BELL,Maria José Valenzuela.
Abstract This work presents the results of a device, MilkTech, developed to detect milk tampering, based on electrical measurements. The device indicates possible frauds by water, sodium chloride, caustic soda, ethyl alcohol and sodium bicarbonate. The advantages in relation to traditional methods are portability, low cost and detection of mixed frauds. The experiments were conducted in dairy plants at Governador Valadares, in Brazil. The results were compared with cryoscopy and chloride tests. It is demonstrated there is high correlation between MilkTech and Cryoscopy. For instance, the detection limit of the equipment for water addition with the set of analyzed data was 0.78% with precision of 1.1%. Adulterations with sodium chloride, caustic soda, ethyl...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Milk; Adulteration; Quality control.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000700038
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Stigmastadiene and specific extitntion (270 nm) to evaluate the presence of refined oils in virgin olive oil commercialized in Brazil Ciênc. Tecnol. Aliment.
Aued-Pimentel,Sabria; Silva,Simone Alves Da; Takemoto,Emy; Cano,Cristiane Bonaldi.
The increased marketing of olive oil in Brazil has intensified legal requirements to ensure regulation of this product. The measurement of the specific extinction at 270 nm (E 270) and content of stigmastadiene can be used to assess the presence of refined oils in virgin olive oil. During the vegetable oil refining process, compounds with conjugated double bonds are generated from unsaturated fatty acids that absorb at 270 nm and sterols, such as stigmasta-3,5-diene. To compare these parameters, seven samples of extra virgin olive oil and three samples of olive oil (blend of virgin and refined) were analyzed. Among the samples analyzed, four extra virgin samples had levels of stigmastadiene and E 270 higher than expected, among which two were adulterated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adulteration; Quality control; Legislation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000300015
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Supply Chain Issues in China’s Milk Adulteration Incident AgEcon
Gale, H. Frederick, Jr.; Hu, Dinghuan.
China’s melamine milk adulteration crisis highlights the challenges that arise as large well-capitalized companies procure raw materials from a diffused supply chain of scattered small farmers and milk collection stations. As milk prices climbed sharply in 2007 and companies branched out into new territories, intense competition for raw milk supplies strengthened incentives to water down and adulterate milk. Effective food safety measures must account for incentives, the distribution of market power in the supply chain and market dynamics.
Tipo: Conference Paper or Presentation Palavras-chave: China; Milk; Dairy industry; Food safety; Adulteration; Market structure; Supply chain; Agribusiness; Food Consumption/Nutrition/Food Safety; Industrial Organization; Livestock Production/Industries.
Ano: 2009 URL: http://purl.umn.edu/51613
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