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| Registros recuperados: 125 | |
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| Rocha,Tatiane Martins; Andrade,Maria Auxiliadora; Souza,Eliete Silva e; Stringhini,José Henrique; Café,Marcos Barcellos; Rezende,Cíntia Silva Minafra e; Pôrto,Regiani Nascimento Gagno. |
| An experiment with 630 one-day-old chicks experimentally inoculated with Salmonella Typhimurium was performed to evaluate the effects of an organic acid blend (benzoic, fumaric and 2-hydroxi-4-methylltio-butanoic - HMTBa) on intestinal health and performance. The experimental challenge with Salmonella Typhimurium occurred in two different routes of administration: via crop on the first day after hatching, and via feed, offered from seven to 14 days of age. These groups were treated with organic acids in a 3 × 2 (agent versus acid) factorial arrangement. Chicks treated with organic acids had higher weight gain, mean live weight and better feed conversion at 14 days of age, and higher weight gain at 28 days of age. Chicks treated with organic acids... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Contamination; Control feed; Conversion; Salmonellosis. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200023 |
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| Acevedo,Ana María; Rodríguez,Edisleidy; Uffo,Odalys; Relova,Damarys; Noda,Julia; Díaz de Arce,Heidy. |
| Avian leukosis viruses (ALV) provoke a variety of trasmissible bening and malign tumoral diseases affecting birds. Chickens are affected by six subgroups of ALV designs A, B, C, D, E and J of more recent world dissemination. These viruses are potential contaminants of live vaccines used in poultry. In order to research the presence of DNA from ALVs as contaminants of viral commercial vaccines to be used in poultry, different Marek´s disease vaccines were screened by a reported polymerase chain reaction (PCR) assay designed to detect all subgroups of ALVs. DNA samples extracted from seven vaccines were submitted to PCR using primers for a conserved region of env gene of HPRS-103. ALV sequences were detected in seven samples (100%). The methodology employed... |
| Tipo: Journal article |
Palavras-chave: Avian leukosis virus (ALV); Polymerase chain reaction (PCR); Vaccine; Contamination; Poultry. |
| Ano: 2009 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2009000100011 |
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| Guerra,Fernando; Trevizam,Anderson Ricardo; Muraoka,Takashi; Marcante,Nericlenes Chaves; Canniatti-Brazaca,Solange Guidolin. |
| Ingestion of vegetables containing heavy metals is one of the main ways in which these elements enter the human body. Once entered, heavy metals are deposited in bone and fat tissues, overlapping noble minerals. Slowly released into the body, heavy metals can cause an array of diseases. This study aimed to investigate the concentrations of cadmium, nickel, lead, cobalt and chromium in the most frequently consumed foodstuff in the São Paulo State, Brazil and to compare the heavy metal contents with the permissible limits established by the Brazilian legislation. A value of intake of heavy metals in human diets was also calculated to estimate the risk to human health. Vegetable samples were collected at the São Paulo General Warehousing and Centers Company,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contamination; Food chain; Potentially toxic element; Daily intake; Consumption habit. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000100008 |
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| Santos,Fabiana Soares dos; Magalhães,Márcio Osvaldo Lima; Mazur,Nelson; Amaral Sobrinho,Nelson Moura Brasil do. |
| Phytostabilisation of a contaminated soil with heavy metals is considered a very appropriate technology to reduce erosion and dispersion of contaminants. A greenhouse study was conducted to evaluate the effects of both chemical amendments (calcium silicate and brewery sludge), and phytoremediation using the grass Brachiaria decumbens, on an industrial residue contaminated with Zn and Cd (industrial residue). Industrial residue samples placed into 30 L containers were amended with 20% brewery sludge, calcium silicate (2%, 3%), and 20% of brewery sludge + calcium silicate (2.5%, 4%), and were compared to the control treatment (non-amended residue). After pH stabilization, B. decumbens plants were grown on all treatments in order to evaluate the ability of... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Phytoremediation; Inertization; Contamination; Heavy metals. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500008 |
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| Oliveira, Janiffe Peres de; Scherwinski-Pereira, Jonny Everson. |
| The objective of this work was to characterize the biochemically systemic bacterial isolated from banana plants, to evaluate the bacterial sensitivity to antibiotics, and to determine the phytotoxicity of banana shoots during in vitro proliferation. Systemic bacteria belonging to the Klebsiella and Aeromonas genera were isolated from the “Maravilha” (FHIA 01 AAAB), “Preciosa” (PV 4285 AAAB) and “Thap Maeo” (AAB) varieties and were then characterized. Tests of shoot sensitivity to antibiotics were performed, and the minimum inhibitory concentration (MIC) and phytotoxic effects of selected antibiotics to plants were determined. Among the 20 antibiotics evaluated, the strains showed sensitivity to cefaclor, cefalexin, cefalotin, nalidixic acid,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ciências agrárias Musa spp.; Micropropagação; Contaminação; Controle microbiano. Produção de mudas Musa spp.; Micropropagation; Contamination; Endophytic microorganisms; Antimicrobial control. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27689 |
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| Orsi, Ricardo Oliveira; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Barreto, Lidia Maria Ruv Carelli; Universidade de Taubaté; Gomes, Silvia Maria Alves; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Kadri, Samir Moura; Universidade Estadual Paulista “Júlio de Mesquita Filho”. |
| The increasing demand for propolis has caused a raise in its production. However, an increasingly pesticide-dependent agriculture is a great concern with regard to bees, their produce and environmental contamination. Current analysis evaluates the presence of pesticides (organochlorines, organophosphates, pyrethroids, carbamates, herbicides, fungicides and acaricides) in samples of propolis from the state of São Paulo, Brazil. Beekeepers from several localities in the state provided samples of propolis (50), which were collected, stored in non-toxic plastic bags and maintained in a freezer for analyses. Possible pesticide residues were examined by gas chromatography method but no pesticide residues were detected in the examined propolis samples. Propolis... |
| Tipo: Pesquisa de campo; análise laboratorial |
Palavras-chave: 5.04.00.00-2; 5.07.01.05-3; 4.06.00.00-9 environmental; Apis mellifera; Agrochemicals; Contamination environmental; Apis mellifera; Agrochemicals; Contamination. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15859 |
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| Vidigal, Tiago Mateus Andrade; Landivar, Elaine Eloiza Cortellini. |
| Consuming raw food like lettuce may carry protozoa cysts and helminth eggs, causing parasitic infections. Therefore, the parasitological analysis of this type of food it’s important for public health because it provides data on the hygiene conditions in which these vegetables were produced, transported, processed and handled until the ingestion. This study aimed to evaluate the occurrence of parasitic structures in samples of lettuce (Lactuca sativa) sold in self-service restaurants in São Miguel do Oeste, Santa Catarina State, Brazil. The samples were randomly collected in 20 locations in duplicate, prepared according to the method of Hoffman, Pons, and Janer (1934) and analyzed with an optical light microscopy. The parasitic structures found were Cysts... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protozoa; Helminths; Contamination; Food; Vegetables.. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/35027 |
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| FERREIRA,ALDO PACHECO. |
| Livers from 108 birds found prostrate or dead in Ilha Grande Bay between 2005 and 2010 were analyzed for 16 PCB congeners (IUPAC numbers 8, 18, 28, 31, 52, 77, 101, 118, 126, 128, 138, 149, 153, 169, 170, and 180). The species analyzed were Egretta caerulea(Linnaeus 1758), Nycticorax nycticorax (Linnaeus 1758),Egretta thula (Molina 1782), and Ardea cocoi(Linnaeus 1766). The analysis were performed using Origin software (7.5, 2004) with a significant level of p<0.05. Data were checked for adherence to the standard assumptions of parametric tests using the Kolmogorov-Smirnov test for normality and the Levene's test for homogeneity of variances. This has revealed differences in concentration for some congeners. Results indicate relatively low PCBs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contamination; Ilha Grande Bay; Polychlorinated biphenyl; Risk to environment and health; Aquatic birds. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401379 |
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| Arantes,Fábio P.; Savassi,Lourenço A.; Santos,Hélio B.; Gomes,Marcos V.T.; Bazzoli,Nilo. |
| The increasing amounts of heavy metals entering aquatic environments can result in high accumulation levels of these contaminants in fish and their consumers, which pose a serious risk to ecosystems and human health. We investigated the concentrations of mercury (Hg), cadmium (Cd), zinc (Zn), chromium (Cr), and lead (Pb) in muscle, liver, and spleen tissues of Pseudoplatystoma corruscans specimens collected from two sites on the Paraopeba River, Brazil. The level of heavy metals concentrations in the tissues was often higher in viscera (i.e. liver and spleen) than in muscle, and thus, the viscera should not be considered for human consumption. Correlations between metal concentrations and fish size were not significant. Although the levels of muscle... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contamination; Freshwater fish; Heavy metal; Human health. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100137 |
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| Milaneze,H.S.; Silva,L.S.; Kottwitz,L.B.M.; Zambom,M.A.; Fonseca,L.M.; Guimarães,A.T.B.; Pozza,M.S.S.. |
| ABSTRACT The aim was to evaluate the microbiological, chemical- physical, and shelf-life quality of milk samples after pasteurization (HTST) for 10 days or ultra-high temperature (UHT) treatment for 120 days. Raw milk counts of mesophilic aerobic microorganisms, Staphylococcus spp. and thermotolerant coliforms before HTST and UHT processing were 6.73 and 7.77; 2.84 and 4.30, and 4.68 and 4.37log10, respectively. Pseudomonas spp. were found in raw milk samples. No presence of any other microorganisms studied was detected and no microbial inhibitor was found. Processed samples met microbiological legal requirements. However, aerobic mesophilic counts for HTST pasteurized milk samples stored for 5 and 10 days increased to values comparable to those in raw... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Contamination; Caseinomacropeptide; Heat treatment. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501625 |
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| Santos,Isaac Rodrigues; Costa,Ronaldo Cataldo; Freitas,Ubiratan; Fillmann,Gilberto. |
| The hypothesis that effluents treated through activated sludge process cause changes in nutrient biogeochemistry of receiving water bodies was investigated in Vieira creek, southern Brazil. Dissolved oxygen, suspended matter, and pH did not vary among the sampling stations. Nutrient, biochemical oxygen demand, and conductivity values were significantly higher downstream from the Wastewater Treatment Plant (WWTP) effluents. Further downstream, nitrate concentrations were higher due to ammonium nitrification, organic matter remineralization and/or the occurrence of unidentified sources. Per capita nutrient emission factors were estimated to be 0.16 kg P.yr-1 and 4.14 kg N.yr-1. Under pristine conditions, low N:P ratios were observed, which were significantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Activated sludge; Nutrients; Contamination; Coastal zone; Biogeochemistry; Eutrophication. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100019 |
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| Cesar,Augusto; Abessa,Denis Moledo de Souza; Pereira,Camilo Dias Seabra; Santos,Aldo Ramos; Fernández,Nuria; Choueri,Rodrigo Brasil; DelValls,Tomas Angel. |
| In this work, multivariate and numeric methods were used to integrate the chemical and ecotoxicological data obtained for the sediments from the Santos Estuarine System, and for the vicinity of the discharges of the Submarine Sewage Outfall of Santos, in order to establish more accurately the environmental risks, identify the priority areas and thus provide guidance to control the programs and public policies. For both the datasets, the concentrations which exceeded numeric sediment guidelines tended to be associated to toxicity. For the estuary, this trend was corroborated by the correlations between the toxicity and Cu and PAHs levels, whereas for the sewage outfall region, this was observed through the correlation between the toxicity and Hg contents.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sediment; Contamination; Toxicity; Tiburonella viscana; Environmental risk assessment. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100028 |
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| Registros recuperados: 125 | |
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