|
|
|
|
|
| Santos,Éder José dos; Santos,Arlene Bispo dos; Herrmann,Amanda Beatriz; Kulik,Suzete; Baika,Loana Mara; Tormen,Luciano; Curtius,Adilson José. |
| An on-line method for Cd and Pb pre-concentration and simultaneous determination in acid digested seafood by inductively coupled plasma optical emission spectrometry (ICP OES) was developed. The on-line pre-concentration was based on the complex formation of the analytes with the ammonium salt of O,O-diethyldithiophosphate (DDTP) and using the Amberlite XAD-4 resin as a solid support in a homemade column. Different conditions of the flow injection system, such as solutions flow rates, nebulizer pressure and eluent concentration were optimized. Three certified reference materials of lobster hepatopancreas, dogfish liver and fish protein, three samples of fish muscle and three samples of shrimp were digested with HNO3, H2O2 and H2SO4 in a microwave system... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cd; Pb; ICP OES; Diethyldithiophosphate; XAD-4; Seafood; Solid phase extraction. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000100017 |
| |
|
|
| ROQUE, M. R. de A.; FERRACINI, V. L.; MELO, I. S. de. |
| O diuron 3-(3-4-diclorofenil) 1,1-dimetilureia é um herbicida comercializado em vários países, entre eles Brasil e Estados Unidos. Este trabalho avaliou a degradação deste herbicida, em meio de cultura. Para quantificar a degradação foi utilizado um método de extração em fase solida (SPE). A taxa de recuperação do diuron em SPE foi de 84,5%. Uma linguagem de Acinetobacter baumannii (D12-12) apresentou os melhores resultados, com uma taxa de degradação de 14,4% e 13% na concentração de 20 e 40 ug ml-1, respectivamente. A linhagem D16-12 de Acinetobacter baumannii apresentou proporcionalidade na taxa de degradação em funcao da concentração do diuron.. |
| Tipo: Folhetos |
Palavras-chave: Degradação química; Herbicida; Análise química; Extração; Bactéria; Herbicides; Chemical degradation; Acinetobacter baumannii; Solid phase extraction. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/13141 |
| |
|
| |
|
| |
|
|
| Jauffrais, Thierry; Kilcoyne, Jane; Sechet, Veronique; Herrenknecht, Christine; Truquet, Philippe; Herve, Fabienne; Berard, Jean-baptiste; Nulty, Ciara; Taylor, Sarah; Tillmann, Urban; Miles, Christopher O.; Hess, Philipp. |
| Azaspiracid (AZA) poisoning has been reported following consumption of contaminated shellfish, and is of human health concern. Hence, it is important to have sustainable amounts of the causative toxins available for toxicological studies and for instrument calibration in monitoring programs, without having to rely on natural toxin events. Continuous pilot scale culturing was carried out to evaluate the feasibility of AZA production using Azadinium spinosum cultures. Algae were harvested using tangential flow filtration or continuous centrifugation. AZAs were extracted using solid phase extraction (SPE) procedures, and subsequently purified. When coupling two stirred photobioreactors in series, cell concentrations reached 190,000 and 210,000 cell·mL−1 at... |
| Tipo: Text |
Palavras-chave: Solid phase extraction; Photobioreactor; Chemostat; Dinoflagellate; Micro-algae; LC-MS/MS; Tangential flow filtration; Azaspiracid; HP-20. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00088/19875/17526.pdf |
| |
|
|
| Tanniou, A.; Vandanjon, L.; Incera, M.; Serrano Leon, Esteban; Husa, V.; Le Grand, Jacqueline; Nicolas, Jean-louis; Poupart, N.; Kervarec, N.; Engelen, A.; Walsh, R.; Guerard, F.; Bourgougnon, N.; Stiger-pouvreau, Valerie. |
| Sargassum muticum, an invasive brown macroalga presently distributed along European Atlantic coasts from southern Portugal to the south coast of Norway, was studied on a large geographical scale for its production of phenolic compounds with potential industrial applications and their chemical and biological activities. S. muticum can produce high biomass in Europe, which could be exploited to supply such compounds. S. muticum was collected in Portugal, Spain, France, Ireland and Norway (three sites/country) to examine the effect of the latitudinal cline and related environmental factors. Assays focused particularly on polyphenols and their activities. Crude acetone–water extracts were purified using solid phase extraction (SPE) and antioxidant and... |
| Tipo: Text |
Palavras-chave: Antioxidant activities; Antibacterial activities; Latitudinal gradient; Phenolic compounds; Solid phase extraction; Sargassum muticum. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28221/32175.pdf |
| |
|
|
|
