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| Registros recuperados: 30 | |
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| LEITAO,LOUIS; MAORET,JEAN-JOSÉ; BIOLLEY,JEAN-PHILIPPE. |
| We quantified the ozone impact on levels of Zea mays L. cv. Chambord mRNAs encoding C4-phosphoenolpyruvate carboxylase (C4-PEPc), ribulose-l,5-bisphosphate carboxylase/oxygenase small and large subunits (Rubisco-SSU and Rubisco-LSU, respectively) and Rubisco activase (RCA) using real-time RT-PCR. Foliar pigment content, PEPc and Rubisco protein amounts were simultaneously determined. Two experiments were performed to study the ozone response of the 5th and the 10th leaf. For each experiment, three ozone concentrations were tested in open-top chambers: non-filtered air (NF, control) and non-filtered air containing 40 (+40) and 80 nL L-1 (+80) ozone. Regarding the 5th leaf, +40 atmosphere induced a loss in pigmentation, PEPc and Rubisco activase mRNAs.... |
| Tipo: Journal article |
Palavras-chave: Carboxylase; Maize; MRNA; Ozone; Rubisco activase. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200005 |
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| Gonçalves,Alex Augusto. |
| In recent years, increasing attention has been focused on the safety of foods, and in particular on the intervention methods to reduce and eliminate human pathogens from fresh product, especially fresh seafood. Traditional technology utilizes water with or without a sanitizing agent to wash fresh seafood. Chlorine is the most widely used sanitizing agent available for fresh product, but it has a limited effect in killing bacteria on seafood surfaces. An alternative treatment is being sought to improve food safety. Many research and industrial trials are underway to validate the use of ozone in the food industry. This article intends to show a clean technology to be applied in seafood industry and to show that many studies must be done to demonstrate the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clean technology; Ozone; Seafood. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600025 |
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| Daud,Fernanda Vasquez; Ueda,Suely Mitoi Ykko; Navarini,Alessandra; Mímica,Lycia Mara Jenné. |
| The ozone is effective against most microorganisms due to its high oxidant power. Low concentrations and short-term contact are sufficient to inactivate bacteria, mold, yeast, parasites, seaweeds, protozoa and fungi. Microsporum canis is an important agent of dermatophitosis in human and animal. The aim of the current study was to assess the efficacy of ozonized oil over Microsporum canis in rabbits. Eighteen male New Zealand white rabbits, weight ranging from 2 to 3.2 kg were depilated in the cranial dorso-lateral and right caudal, and cranial and left caudal regions. The regions were inoculated with Microsporum canis, excepting the right caudal region, and were denominated TM, O, OM and M, respectively. After seven days, the treatment of lesions in TM... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungi; Microsporum; Oils; Ozone; Rabbits. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100035 |
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| Ferreira,Wallas Felippe de Souza; Alencar,Ernandes Rodrigues de; Alves,Hanna; Ribeiro,Jaqueline Lamounier; Silva,Caroline Rosa da. |
| ABSTRACT Ozonation has been proposed as an alternative for the post-harvest treatment of plant products. Therefore, the objective of this study was to evaluate the influence of the pH on the efficacy of ozonated water to control microorganisms and to determine the possible effects of ozone on the quality of stored strawberries. To evaluate the influence of pH on ozonated water in Portola variety strawberries, the strawberries were divided into six batches. Three batches were exposed to ozonated water and three batches were exposed to non-ozonized water with different pH levels and an immersion time of 5 min. The pH values used were 3.0, 6.5 and 8.7. After the ozonation, the fruits were stored in a cold chamber at 5 °C for 6 days, and analyses were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ozone; Microbiological quality; Qualitative changes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600692 |
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| HESHMATI,Ali; NAZEMI,Fatemeh. |
| Abstract Dichlorvos (DDVP) is one of the most consumption chlorinated organophosphate insecticide used on tomato. The knowledge about the influence of postharvest household processes on the levels of DDVP residues in vegetables is required to estimate dietary exposure. In this study, the removal of sprayed dichlorvos (DDVP) on tomato by washing with tap, ozonated water (in dosages of 2, 4 and 6 mg ozone/L), a commercial detergent solution (in concentration of 1, 2 and 3%) and ultrasonic cleaner (with power of 100, 200 and 300 W) was investigated. DDVP residue was determined by gas chromatography with electron capture detector. Washing processes led to the significant reduction of DDVP. The gradual increase in the percentage of the removal was observed due... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dichlorvos; Pesticide; Ozone; Ultrasonic; Tomato. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000300441 |
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| BASTOS,Renan Gomes; OLIVER,Josidel Conceição; GERMANO,Jaqueline de Lima; FERNANDES,Gislene Regina; VEIGA,Sandra Maria Oliveira Morais. |
| Abstract Washing and sanitization are considered particularly critical steps for the microbiological quality of fruits. At this stage, it is important to select the sanitizer which must have microbiological effectiveness. In the literature, there is a great interest on alternative sanitizers for microbiological quality control of food. This study aimed at verifying the effectiveness of sodium hypochlorite, ozone, ultrasound and citric acid as well as associations of ultrasound to the other techniques mentioned above in the microbiological quality control of strawberries cv. Oso Grande. In these trials, the fruits were initially subjected to artificial contamination by a strain of Escherichia coli ATCC 25922 and thereafter part of them was reserved as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sanitization; Strawberries; Citric acid; Ultrasound; Ozone. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000600470 |
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| Sexto Monroy, Benjamin. |
| En el presente trabajo se implementa la modelación de valores extremos con la metodolog ía "block maxima", específicamente en niveles m áximos diarios de ozono de la estaci ón Pedregal de la Cd. de M éxico de los años 2001 a 2008, usando la distribución Dagum que es de cola pesada y es usada generalmente como distribuci ón de ingreso, pero tiene un antecedente en el campo meteorol ógico, donde fue usado para modelar la cantidad de precipitaci ón pluvial. Una visualizaci ón general de los datos, hecha gr áficamente, revela una tendencia a la baja de los niveles m áximos diarios de ozono, por lo cual se decide realizar el an álisis por año. Mediante la prueba de Kolmogorov-Smirnov se prueba si las observaciones de cada año siguen la distribución Dagum. El... |
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Palavras-chave: Tendencia; Ozono; Valor Extremo; VGAM; Trends; Ozone; Extreme Value; Maestría; Estadística. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/364 |
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| Reyes Cervantes, Hortensia Josefina. |
| En este traba jo se proponen dos metodolog´ıas estad´ısticas de an´alisis basada en la teor´ıa de valores extremos para modelar tendencias de contaminaci´ on, aplic´andose en el caso particular de la contaminaci´on ambiental de la Ciudad de M´exico. En la pri- mera metodolog´ıa, suponiendo que los datos de medici´on de ozono se pueden modelar de acuerdo a un modelo param´etrico, pues existen las condiciones de regularidad para la funci´on GVE, se pueden aplicar resultados de la teor´ıa asint´otica para investigar si hay condiciones para que los par´ametros estimados tengan distribuci´on normal y se pueda estimar la funci´on cuantil de la distribuci´on GVE. Para la funci´on cuantil a diferentes niveles, en este caso para p = 0.05, se obtiene la... |
| Tipo: Tesis |
Palavras-chave: Teor´ıa de valores extremos; Ozono troposf´erico; Excedencias; Ozono Theory of extreme values; Tropospheric ozone; Exceedances; Ozone. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1054 |
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| Sexto Monroy, Benjamín. |
| En el presente trabajo se implementa la modelación de valores extremos con la metodolog ía "block maxima", específicamente en niveles m áximos diarios de ozono de la estaci ón Pedregal de la Cd. de M éxico de los años 2001 a 2008, usando la distribución Dagum que es de cola pesada y es usada generalmente como distribuci ón de ingreso, pero tiene un antecedente en el campo meteorol ógico, donde fue usado para modelar la cantidad de precipitaci ón pluvial. Una visualizaci ón general de los datos, hecha gr áficamente, revela una tendencia a la baja de los niveles m áximos diarios de ozono, por lo cual se decide realizar el an álisis por año. Mediante la prueba de Kolmogorov-Smirnov se prueba si las observaciones de cada año siguen la distribución Dagum. El... |
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Palavras-chave: Tendencia; Ozono; Valor Extremo; VGAM; Trends; Ozone; Extreme Value; Maestría; Estadística. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/364 |
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| FREITAS-SILVA, O.; CASTRO, I. M. de; TROBETE, F. M.; ASCHERI, J. L. R.; DIREITO, G. M.; PORTO, Y. D.. |
| O presente trabalho estudou o efeito da aplicação de ozônio gasoso sobre a degradação das aflatoxinas AFB1, AFB2, AFG1 e AFG2 em milho, em três diferentes condições experimentais, de modo a se avaliar a viabilidade de um sistema-protótipo proposto para ozonização. A ozonização gasosa mostrou-se uma tecnologia não térmica eficaz para reduzir a contaminação por aflatoxinas em milho triturado. Os tratamentos com ozonização mais drásticos, ou seja, aqueles com maior concentração de ozônio, maior tempo de exposição e menor massa de grãos, apresentaram melhores resultados na redução da contaminação por aflatoxinas totais, alcançando valores próximos a 45%. Portanto, o sistema de ozonização proposto mostrou-se eficaz nas condições estudadas, podendo servir de... |
| Tipo: Folhetos |
Palavras-chave: Descontaminação de micotoxinas; Aflatoxin decontamination; Ozônio; Zea Mays; Tecnologia de Alimento; Grão; Produto de Origem Vegetal; Ozone; Food technology; Vegetable products; Grains. |
| Ano: 2019 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1110442 |
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| Li, Xian; Blancheton, Jean-paul; Liu, Ying; Triplet, Sebastien; Michaud, Luigi. |
| The direct impact of oxidation–reduction potential (ORP) on fish welfare and water quality in marine recirculating aquaculture systems (RAS) is poorly documented. In this study, the effects of the fish size (S1, S2, S3) and ORP level (normal, four successive levels) on the performance of European sea bass (Dicentrarchus labrax) were investigated. Three size fish were distributed into two RAS (RAS and RAS O3). Ozone was injected into RAS O3 to increase the ORP level. The ORP was stabilized to four successive levels: 260–300, 300–320, 320–350, and 300–320 mV in fish tanks during four periods (P1–4). At the last day of each period, the hematological parameters, plasma protein and mortality of sea bass were analyzed. Two-way ANOVA revealed that several... |
| Tipo: Text |
Palavras-chave: ORP; Performance; European sea bass; RAS; Ozone. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28201/26502.pdf |
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| Leonard, Noemie. |
| Recirculation of the water of fish rearing systems requires a biological treatment based on the nitrifying activity of autotrophic bacteria. In parallel heterotrophic bacterial populations utilise the organic substrate, produced by the fish, to grow. Opposite to the autotrophic populations, the heterotrophic bacteria (1) have a quick growth and (2) might contain fish pathogenic strains. The main aim was to characterise the heterotrophic bacteria populations ?.nd to understand (1) which parameters do control the dynamics of their populations and (2) their influence on the quality of the recirculating water. In a rearing system, the heterotrophic bacterial populations are stable in number and in genus, for a given operating mode. The bacteria are either... |
| Tipo: Text |
Palavras-chave: Carbon; Gills; Bacterium; Humics substances; Fish; Ozone; Aquiculture; Carbone; Branchies; Bacterie; Substances humiques; Poisson; Ozone; Aquaculture. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/these-1728.pdf |
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| Registros recuperados: 30 | |
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