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Registros recuperados: 26
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Bioaccumulation of trace elements in pelagic fish from the Western Indian Ocean ArchiMer
Kojadinovic, Jessica; Potier, Michel; Le Corre, Matthieu; Cosson, Richard P.; Bustamante, Paco.
Trace elements were analyzed in fish of commercial interest to determine their importance in marine systems of the Western Indian Ocean and their bioaccumulation patterns. The results are equivalent or lower than levels reported in ichthyofauna worldwide. Certain values of muscular Cd, Hg, Pb and Zn were, however, above thresholds for human consumption. Levels varied among tissues, species and fish length, but were seldom influenced by the nutritional condition of the fish, its gender and its reproductive status. Correlations between hepatic Hg and Se levels in Swordfish (r(2) = 0.747) and Yellowfin Tunas (r(2) = 0.226), and among metallothionein linking metals imply the existence of detoxification processes in these species. Level differences between fish...
Tipo: Text Palavras-chave: Guidelines; Detoxification; Contamination; Fish; Metals.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2490.pdf
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Contribution d'un film bacterien a la culture intensive de Daphnia magna ArchiMer
Langis, R; Proulx, D; Lanoue De La, J; Couture, P.
Laboratory scale experiments show that can increase of the biofilm in cultivation tanks improves significantly the productivity of Daphnia
Tipo: Text Palavras-chave: Daphnia magna; Branchiopoda; Bacteria; Detoxification; Nutrition; Interspecific relationships.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1411.pdf
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Copper in plants Braz. J. Plant Physiol.
Yruela,Inmaculada.
Copper is an essential metal for normal plant growth and development, although it is also potentially toxic. Copper participates in numerous physiological processes and is an essential cofactor for many metalloproteins, however, problems arise when excess copper is present in cells. Excess copper inhibits plant growth and impairs important cellular processes (i.e., photosynthetic electron transport). Since copper is both an essential cofactor and a toxic element, involving a complex network of metal trafficking pathways, different strategies have evolved in plants to appropriately regulate its homeostasis as a function of the environmental copper level. Such strategies must prevent accumulation of the metal in the freely reactive form (metal detoxification...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Copper homeostasis; Copper transporters; Detoxification; Metalloproteins; Toxicity.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100012
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De novo transcriptome assembly of the lobster cockroach Nauphoeta cinerea (Blaberidae) Genet. Mol. Biol.
Segatto,Ana Lúcia Anversa; Diesel,José Francisco; Loreto,Elgion Lucio Silva; da Rocha,João Batista Teixeira.
Abstract The use of Drosophila as a scientific model is well established, but the use of cockroaches as experimental organisms has been increasing, mainly in toxicology research. Nauphoeta cinerea is one of the species that has been studied, and among its advantages is its easy laboratory maintenance. However, a limited amount of genetic data about N. cinerea is available, impeding gene identification and expression analyses, genetic manipulation, and a deeper understanding of its functional biology. Here we describe the N. cinerea fat body and head transcriptome, in order to provide a database of genetic sequences to better understand the metabolic role of these tissues, and describe detoxification and stress response genes. After removing low-quality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nauphoeta cinerea; Transcriptome assembly; Fat body; Detoxification.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000400713
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Decolorization of different textile dyes by Penicillium simplicissimum and toxicity evaluation after fungal treatment BJM
Bergsten-Torralba,L.R.; Nishikawa,M.M.; Baptista,D.F.; Magalhães,D.P.; Silva,M. da.
The objective of this study was to investigate the capacity of decolorization and detoxification of the textile dyes Reactive Red 198 (RR198), Reactive Blue 214 (RB214), Reactive Blue 21 (RB21) and the mixture of the three dyes (MXD) by Penicillium simplicissimum INCQS 40211. The dye RB21, a phthalocyanine, was totally decolorized in 2 days, and the others, the monoazo RR198, the diazo RB214 and MXD were decolorized after 7 days by P. simplicissimum. Initially the dye decolorization involved dye adsorption by the biomass followed by degradation. The acute toxicity after fungal treatment was monitored with the microcrustacean Daphnia pulex and measured through Effective Concentration 50% (EC50). P. simplicissimum reduced efficiently the toxicity of RB21...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fungi; Textile dyes; Decolorization; Detoxification.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400011
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Degradation and detoxification of three textile Azo dyes by mixed fungal cultures from semi-arid region of Brazilian Northeast BABT
Nascimento,Carlos; Magalhães,Danielly de Paiva; Brandão,Martha; Santos,André Batouli; Chame,Marcia; Baptista,Darcílio; Nishikawa,Marília; Silva,Manuela da.
The aim of this work was to study the degradation and detoxification of three textile azo dyes (Reactive Red 198, Reactive Red 141 and Reactive Blue 214) by mixed fungal cultures from semi-arid region of Brazilian Northeast. Sediment samples of twenty water reservoirs in the surroundings of Serra da Capivara National Park, area of environmental preservation in the caatinga in the State of Piauí, with semi-arid climate, were evaluated in order to select the consortia of fungi capable to degrade and detoxify these dyes. The mixed fungal culture from Caldeirão Escuridão (CE) reservoir was the most efficient in the degradation and detoxification of the dyes tested.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fungi; Mycoremediation; Azo dyes; Degradation; Detoxification.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300024
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Detoxification enhancement in the gymnodimine-contaminated grooved carpet shell, Ruditapes decussatus (Linne) ArchiMer
Medhioub, Walid; Gueguen, Marielle; Lassus, Patrick; Bardouil, Michele; Truquet, Philippe; Sibat, Manoella; Nejib, Medhioub; Philippe, Soudant; Mejdeddine, Kraiem; Amzil, Zouher.
In the Gulf of Gabes (Tunisia, Eastern Mediterranean sea), the grooved carpet shell Ruditapes decussatus has been seen to contain persistent levels of gymnodimine (GYM) for several years. The present experimental work represents the first attempt to assess detoxification kinetics of fast-acting toxins (FAT) in marine molluscs fed specific diets of non-toxic algae (Isochrysis galbana). To find an optimal detoxification method, two experiments were performed in which clams were first fed the toxic dinoflagellate Karenia selliformis to artificially contaminate them with GYM, thus simulating the effect of natural toxic episodes. As a second step, the same clams were fed a non-toxic algae, I. galbana. to speed up the detoxification process. Changes in toxin...
Tipo: Text Palavras-chave: Ruditapes decussates; Grooved carpet shell; Karenia selliformis; Gymnodimine; Toxicity; Detoxification.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/2010/publication-7488.pdf
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Detoxification of Pacific oyster Crassostrea gigas fed on diets of Skeletonema costatum with and without silt, following PSP contamination by Alexandrium minutum ArchiMer
Gueguen, Marielle; Bardouil, Michele; Baron, Regis; Lassus, Patrick; Truquet, Philippe; Massardier, Julie; Amzil, Zouher.
Contamination of shellfish by paralytic shellfish poisoning ( PSP) toxins poses an economic threat to shellfish farmers. As contaminated shellfish cannot be harvested for long periods of time, it would be very useful to develop processes to optimise and shorten their detoxification. In this study, Pacific oysters Crassostrea gigas were first experimentally contaminated over a period of 13 days with a continuous flow of toxic Alexandrium minutum cultures at concentrations ranging from 150 to 200 cell ml(-1) ( toxin content after 13 days of contamination 438 mu g STX equiv. 100 g(-1) wet weight). Then, two different detoxification treatments were tested and showed detoxification rates greater than those observed in coastal environments. The first treatment...
Tipo: Text Palavras-chave: Alexandrium minutum; Crassostrea gigas; Detoxification; Inorganic matter; Organic matter; PSP; Paralytic shellfish poisoning.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-3896.pdf
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Effect of caffeine and tannins on cultivation and fructification of Pleurotus on coffee husks BJM
Fan,Leifa; Soccol,Andréa Thomaz; Pandey,Ashok; Vandenberghe,Luciana Porto de Souza; Soccol,Carlos Ricardo.
The objective of this work was to study the effect of caffeine and tannins on Pleurotus sp. cultivation and to evaluate the feasibility of using coffee husks as substrate for mushroom cultivation. Eight strains of P. ostreatus and two strains of P. sajor-caju were screened on a medium prepared from agar extract of coffee husk. Based on best mycelial growth and biomass production, the strain P. ostreatus LPB 09 was selected for detailed studies. With the increase of caffeine concentration, the mycelial growth and the biomass production decreased, and no growth was observed when concentration of caffeine was 2500 mg/L. Furthermore, Pleurotus did not degrade the caffeine, but absorbed it. Tannin under 100 mg/L in the medium stimulated the growth of mycelia,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cultivation; Pleurotus; Caffeine; Tannin; Detoxification.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400003
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Etude de l’impact de l’alimentation sur la detoxification de la palourde <Ruditapes decussatus> contaminée in-situ par les gymnodimines (lagune de Boughrara, sud de la Tunisie) OceanDocs
Medhioub, W.; Amzil, Z.; Sudant, Ph.; Hamza, A.; Medhioub, M.N.; Kraiem, M.M.; Lassus, P..
Depuis 1994 la prolifération de la micro algue toxique, Karenia selliformis, productrice de la gymnodimine (GYM), dans le golfe de Gabes (Sud de la Tunisie) contamine fréquemment les sites de production de la palourde Ruditapes decussatus et, d’une façon continue la lagune de Boughrara, entrainant ainsi l’arrêt de la commercialisation de cette espèce. La contamination des mollusques bivalves par les phycotoxines est un problème mondial qui nécessite d’apporter une solution. C’est dans ce cadre que s’inscrit ce travail qui a pour objectif l’étude de l’impact de l’alimentation à base de la microalgue fourrage Isochrysis galbana Tahitian clone (T.Iso) sur la cinétique de détoxification de la palourde contaminée naturellement. Les analyses de la toxine ont été...
Tipo: Journal Contribution Palavras-chave: Detoxification.
Ano: 2013 URL: http://hdl.handle.net/1834/5901
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Genotoxicity and activation of cellular defenses in transplanted zebra mussels Dreissena polymorpha along the Seine river ArchiMer
Chatel, Annelle; Faucet-marquis, Virginie; Gourlay-france, Catherine; Pfohl-leszkowicz, Annie; Hubert, Francoise.
The aim of the present study was to confirm the relevance of studying DNA adduct formation in a field study. In that context, freshwater mussels Dreissena polymorpha, collected in a reference station, were transplanted in different sites with a pollution gradient. After one and two months, mussels were collected and DNA adduct formation was analyzed using the 32P post labelling technique on both gills and digestive glands. In addition, the expression of genes involved in the detoxification system (catalase (CAT), superoxide dismutase (SOD), glutathione S-transferase (GST), HSP70, aryl hydrocarbon receptor (AHR), P glycoprotein (PgP), metallothionein (MT)) was assessed by RT-PCR. DNA adducts were observed at amount comparable to data from literature....
Tipo: Text Palavras-chave: Biomarker; Pollution; DNA adducts; Detoxification; Dreissena polymorpha; RT-PCR.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00195/30639/32450.pdf
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Immunization with native and cobalt 60-irradiated Crotalus durissus terrificus venom in swiss mice: assessment of the neutralizing potency of antisera J. Venom. Anim. Toxins incl. Trop. Dis.
Ferreira Junior,R. S.; Nascimento,N.; Martinez,J. C.; Alves,J. B.; Meira,D. A.; Barraviera,B..
ELISA was used to evaluate, follow, and compare the humoral immune response of Swiss mice during hyperimmunization with natural and Cobalt 60-irradiated (60Co) Crotalus durissus terrificus venom. Potency and neutralization were evaluated by in vitro challenges. After hyperimmunization, immunity was observed by "in vivo" challenge and the side effects were assessed. The animals immunization with one LD50 of the venom was on days one, 15, 21, 30, and 45, when blood samples were collected; the challenges occurred on the 60th day. Results showed that ELISA was efficient in evaluating, following, and comparing mouse immune response during hyperimmunization. Serum titers produced with natural venom were similar to those produced with irradiated venom....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hyperimmunization; Irradiation; Crotalus durissus terrificus; ELISA; Serum neutralization; Detoxification.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000300008
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Immunological assessment of mice hyperimmunized with native and Cobalt-60-irradiated Bothrops venoms J. Venom. Anim. Toxins incl. Trop. Dis.
Ferreira Junior,R. S.; Nascimento,N.; Martinez,J. C.; Alves,J. B.; Meira,D. A.; Barraviera,B..
ELISA was used to evaluate, accompany, and compare the humoral immune response of Swiss mice during hyperimmunization with native and Cobalt-60-irradiated (60Co) venoms of Bothrops jararaca, Bothrops jararacussu and Bothrops moojeni. Potency and neutralization were evaluated by in vitro challenges. After hyperimmunization, immunity was observed by in vivo challenge, and the side effects were assessed. The animals immunization with one LD50 of each venom occurred on days 1, 15, 21, 30, and 45, when blood samples were collected; challenges happened on the 60th day. Results showed that ELISA was efficient in evaluating, accompanying and comparing mouse immune response during hyperimmunization. Serum titers produced with natural venom were similar to those...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Venom; Irradiation; Bothrops; ELISA; Serum production; Detoxification.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000400006
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Improving detoxification Efficiency of PSP-contaminated oysters (Crassostrea gigas Thunberg) ArchiMer
Lassus, Patrick; Bardouil, Michele; Baron, Regis; Berard, Jean-baptiste; Masselin, Pierre; Truquet, Philippe; Pitrat, Jp.
Shellfish production, and production of marine bivalve molluscs in particular, is the main form of marine aquaculture in the European Union, with a production estimated at 1,200,000 tons in 1999 (Food and Agricultural Organization). Moreover, aquaculture production is rapidly expanding throughout Europe and is becoming a major economic resource in developing areas such as Northern Greece, Ireland, and northwestern Spain. These shellfish, mainly mussels, oysters, and clams, are produced in a natural environment. Due to variations in their environment, these otherwise edible species may however become unsafe for human consumption. Potential problems are amplified due to the nature of shellfish themselves: as they are filter feeders, they consume large...
Tipo: Text Palavras-chave: Detoxification; PSP toxin; Toxic algae; Bioaccumulation; Contaminant; Clam; Mussel; Oyster; Shellfish culture.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-2271.pdf
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Intake, digestibility and nitrogen balance in sheep fed diets containing detoxified castor cake Rev. Ciênc. Agron.
Furtado,Rafael Nogueira; Pompeu,Roberto Cláudio Fernandes Franco; Cândido,Magno José Duarte; Pereira,Elzânia Sales; Lopes,Marcos Neves; Rogério,Marcos Cláudio Pinheiro.
ABSTRACT The effect of substituting soybean meal (SM) with four levels (0, 33, 67 and 100%) of detoxified castor cake (DCC) on intake, nutrient digestibility and nitrogen balance was evaluated in uncastrated, male, crossbred sheep in a randomised complete block design with four treatments and five replications. There was a decreasing linear effect from the levels of substitution on dry matter (DM), organic matter (OM) and crude protein (CP) intake, total carbohydrates (TC), non-fibrous carbohydrates (NFC) and total digestible nutrients (TDN), and on DM, OM and TC digestibility, for reductions of 2.04, 1.70, 0.35, 1.56, 1.89 and 1.67 g dia-1 and 0.34, 0.53 and 0.51 g kg-1 DM respectively, for each 1% SM substituted with DCC. DMI and NDFap expressed, in %BW...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Detoxification; Ricin; Ricinus communis; Nutritional value..
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100412
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Lead toxicity in plants Braz. J. Plant Physiol.
Sharma,Pallavi; Dubey,Rama Shanker.
Contamination of soils by heavy metals is of widespread occurrence as a result of human, agricultural and industrial activities. Among heavy metals, lead is a potential pollutant that readily accumulates in soils and sediments. Although lead is not an essential element for plants, it gets easily absorbed and accumulated in different plant parts. Uptake of Pb in plants is regulated by pH, particle size and cation exchange capacity of the soils as well as by root exudation and other physico-chemical parameters. Excess Pb causes a number of toxicity symptoms in plants e.g. stunted growth, chlorosis and blackening of root system. Pb inhibits photosynthesis, upsets mineral nutrition and water balance, changes hormonal status and affects membrane structure and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant defense system; Detoxification; Lead; Osmolytes; Toxicity; Phytochelatin; Phytoremediation; Rhizofiltration; Tolerance.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202005000100004
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Modélisation de la détoxication de mollusques bivalves contenant des phycotoxines paralysantes ou diarrhéiques ArchiMer
Gueguen, Marielle.
The purpose of this study is to implement models to describe detoxification kinetics of Pacific oysters Crassostrea gigas and Blue mussels Mytilus edulis containing paralytic and diarrheic phycotoxins respectively. First, experimental trials made it possible to complement data from the literature regarding the understanding of processes involved in mollusc detoxification. In particular, they pointed out a difference in the mollusc capacity to degrade cellwalls of phycotoxin-producing dinoflagellates, according to their en cystement capacities. It was observed that paralytic phycotoxins reached the various oyster tissues whereas diarrheic toxins were mainly sequestred in the digestive gland of mussels. The latter seem to be retained by lysosomes localized...
Tipo: Text Palavras-chave: Modélisation; Mytilus edulis; Crassostrea gigas; Phycotoxines; Détoxication; Acide okadaïque; Toxines paralysantes; Modelling; Mytilus edulis; Crassostrea gigas; Phycotoxins; Detoxification; Okadaix acid; Paralytic toxin.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00003/11473/8032.pdf
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Mycotoxin in mold corn, detoxification and utilization of mold corn in chick rations Thai Agricultural
Prateap Rachapaetayakom; Ankana Hanbranchong; Suporn Sukhupanyaraxa.
4 tables
Palavras-chave: Corn; Maize; Chickens; Mycotoxin; Mold corn; Detoxification; Rations; Ingredients; Feeds; Growth; ข้าวโพด; สารพิษจากเชื้อรา; การทำลายสารพิษ; สูตรอาหาร; ลูกไก่.
Ano: 1977 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3943
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Selectivity of Iodosulfuron-Methyl to Oat Cultivars Planta Daninha
QUEIROZ,,A.R.S.; VIDAL,,R.A.; NAVA,,I.C.; PACHECO,,M.T.; FEDERIZZI,,L.C.; XAVIER,E..
ABSTRACT Weeds are among the main constraints to high grain yield on hexaploid oat (Avena sativa), but there are few herbicides registered for weed control on this cereal crop. The objectives of this study were to evaluate the impact of the iodosulfuron-methyl on grain yield of elite oat cultivars and investigate the mechanism of oat tolerance to this herbicide. A field experiment conducted in 2012 demonstrated there was no difference on grain yield between cultivars URS Guará and URS Guria, when iodosulfuron-methyl was used up to 4.5 g ha-1. Likewise, experiments from 2013 have demonstrated that iodosulfuron-methyl, at 5 g ha-1, did not affect the oat grain yield of the genotype UFRGS 14, but affected it on the cultivars URS Guará and URS Guria. In 2014,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avena sativa; Detoxification; Tolerance; Acetolactate synthase inhibitor.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100227
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Subcellular distribution of Ag, Cd, Co, Cu, Fe, Mn, Ph, and Zn in the digestive gland of the common cuttlefish Sepia officinalis ArchiMer
Bustamante, Paco; Bertrand, M; Boucaud Camou, E; Miramand, Pierre.
The subcellular fractionation of the digestive gland cells of the common cuttlefish Sepia officinalis was performed to investigate the distribution of metals between organelles and cytosol and the different cytosolic fractions separated by gel-filtration chromatography. Total metal concentrations vary over 3 orders of magnitude, ranging from dwt for Pb to dwt for Zn. With the exception of Cd, Co, and Cu, metals were mostly bound to the organelles. Whereas no specific organelle compartment was found for Mn, Ph, and Zn, Fe was mainly associated with nucleus, brown body, and "boule" fraction (i.e., 52%) and 44% of the total Ag was contained in the lysosomal and mitochondria enriched fraction. The link of metals with hydrosoluble proteins in the cytosolic...
Tipo: Text Palavras-chave: Sepia officinalis; Chromatography; Metallothionein; Detoxification; Trace element; Metal; Cephalopod.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2532.pdf
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