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Alvarez M.S.,University of Vigo | Gomez L.,University of Vigo | Ulloa R.G.,Technological Institute of Sonora | Deive F.J.,University of Vigo | And 2 more authors.
Chemical Engineering Journal

The presence of emerging contaminants such as antibiotics is currently urging the search of new techniques to efficiently remove them from the environment. In this work, the exceptional ability of a cholinium-based ionic liquid to salt out aqueous solutions of non-ionic surfactants containing tetracycline and oxytetracycline has been demonstrated. The deep characterization of the phase diagrams has allowed implementing the process with an antibiotic-polluted effluent, reaching extraction levels higher than 96%. The viability of the proposed strategy has been checked in a urine-type effluent and real swine wastewater stream, observing that no important alterations are detected in the phase segregation capacity, and values of antibiotics removal over 70% are reached. The number of cycles that both the ionic liquid and the surfactant can be reused demonstrates the potential of the proposed process to be applied at a real swine wastewater. © 2016 Elsevier B.V. Source

Sanches-Silva A.,Instituto Nacional Of Saude Doctor Ricardo Jorge Insa | Costa H.S.,Instituto Nacional Of Saude Doctor Ricardo Jorge Insa | Losada P.P.,University of Santiago de Compostela | Sendon R.,University of Santiago de Compostela | And 4 more authors.
Nutrition Bulletin

The project 'Preparation of active packaging with antioxidant and antimicrobial activity based on astaxanthin and chitosan' (PAPAAABAC, in Spanish PEACAABAQ) brings together a multi-disciplinary team from Mexico, Spain and Portugal, with expertise in different areas of food and polymer sciences. The working programme includes optimisation of the extraction and characterisation of astaxanthin and chitosan from shrimp waste, and incorporation of these compounds into plastic (polymeric matrices), in order to obtain new packaging with antioxidant and antimicrobial properties (active packaging) and finally control-release studies which are carried out in order to determine the quantity of active compounds that should be included in the packaging. This is a 2-year project which started in 2009 and is funded by FONCYCIT (Fund for International Cooperation of Science and Technology EU-Mexico; Fondo de Cooperación Internacional de Ciencia y Tecnologia Unión Europea-Mexico) under the coordination of Professor Jaime López Cervantes from the Technological Institute of Sonora (ITSON). © 2010 The Authors. Journal compilation © 2010 British Nutrition Foundation. Source

Ruelas-Inzunza J.,Technological Institute of Mazatlan | Sanchez-Osuna K.,Technological Institute of Mazatlan | Amezcua-Martinez F.,National Autonomous University of Mexico | Spanopoulos-Zarco P.,Technological Institute of Sonora | Manzano-Luna L.,National Autonomous University of Mexico
Marine Pollution Bulletin

Baseline Hg concentration in bycatch fish from the SE Gulf of California were determined in muscle and liver of 19 species. Levels of Hg in muscle were compared with legal limits of this element in national and international legislation. Considering all fish species, mean concentrations in liver (2.458±1.997μgg-1) were significantly higher (p<0.05) than in muscle (0.993±0.670μgg-1). The sequence of averaged Hg concentrations in most ichthyofauna was liver>muscle. Highest level of Hg in muscle (2.556μgg-1) and liver (7.515μgg-1) corresponded to Diapterus peruvianus and Ophioscion strabo, respectively. Considering muscle samples, none of the species had levels of Hg above the limit (1.0μgg-1 wet weight) in the Mexican legislation; with respect to the Japanese (0.4μgg-1 wet weight) and British (0.3μgg-1 wet weight) legislations, 26.3% and 31.6% of the species respectively, were above the corresponding limits. © 2012 Elsevier Ltd. Source

Ochoa-Meza A.R.,Technological Institute of Sonora | Ibarra-Gamez C.,Technological Institute of Sonora | Hernandez-Lopez J.,Center for Biological Northwest | Gollas-Galvan T.,Center for Food Research and Development | Unzueta-Bustamante M.L.,National Institute of Fisheries and Aquaculture
Archives of Biological Sciences

Yellow head disease is caused by the yellow head virus (YHV). This important disease affects Penaus monodon farms in Thailand. In Mexico, reports of this disease in L. vannamei have been issued. This has not been officially declared by the World Organization for Animal Health (OIE). This study reports a method of reverse-transcription polymerase chain reaction for the detection of this virus in shrimp. A certified sample was analyzed with a commercial detection system for YHV. We obtained a differential sequence of genotypes that cause both YHV and gill-associated virus (GAV) by comparison with ClustalW. Primers were designed for amplification of the fragment by a TaqMan probe with which a positive standard to YHV was amplified. Tests were negative for other pathogens. A survey of shrimp farms in Mexico in 2009 showed negative results for YHV presence. These results demonstrate that the system developed in this study is a specific diagnostic method, sensitive and reproducible for detection of YHV. Source

Spanopoulos-Zarco P.,Technological Institute of Sonora | Ruelas-Inzunza J.,Technological Institute of Mazatlan | Jara-Marini M.E.,Research Center En Alimentacion sarrollo Ac | Meza-Montenegro M.,Technological Institute of Sonora
Environmental Monitoring and Assessment

With the aim of determining arsenic (As) and selenium (Se) concentrations in bycatch fishes from SW Mexico and comparing elemental concentrations with limits for human consumption set in the national and international legislation, three fish species (Diapterus peruvianus, Pseudupeneus grandisquamis, and Trachinotus kennedyi) were collected from Guerrero state during trawling operations. Additionally, As and Se levels in muscle tissue were compared with similar species from diverse areas. The order of As and Se concentrations was T. kennedyi > P. grandisquamis > D. peruvianus. In Mexico, there is no regulation of As and Se levels in fish. In comparison to the legal limit (0.1 μg g−1 wet weight) set by legislation in Venezuela, As levels in the edible portion of T. kennedyi (0.632 μg g−1 wet weight), P. grandisquamis (0.166 μg g−1 wet weight), and D. peruvianus (0.157 μg g−1 wet weight) were above this limit. In the case of Se, average concentrations in T. kennedyi (0.323 μg g−1 wet weight) were above the maximum permissible limit (0.30 μg g−1 wet weight) set in the Chilean legislation. Se concentrations in Carangoides bajad from Saudi Arabia were comparable to values in T. kennedyi (this study). In relation to As, concentrations varied in magnitude orders; the highest As concentration (range 10.35 to 23.71 μg g−1 wet weight) corresponded to Mullus barbatus from the Iberian Mediterranean. © 2015, Springer International Publishing Switzerland. Source

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