|
|
|
| Registros recuperados: 34 | |
|
| |
|
| |
|
|
| Machado, Aline Belem; Caprara, Juliana Foresti; Franceschi, Itiane Diehl de; Linden, Rafael; Berlese, Daiane Bolzan; Feksa, Luciane Rosa. |
| Hexavalent chromium [Cr (VI)] is a metal utilized in different industries and consequently disposed in the environment. It is a toxic substance and its reduction to trivalent Cr [Cr (III)] generates intermediates, which are responsible for the oxidation of molecules, and cause the oxidative stress. Therefore, the aim of this study was to evaluate if Cr (VI) could induce oxidative stress in Wistar rats. In this study, Wistar rats were chronically exposed to 25 and 50 ppm of potassium dichromate in drinking water for 30 days. The levels of Cr were evaluated in the blood and tissues (liver, kidneys, and lungs). Oxidative stress was determined in the liver, kidneys, and lungs and was evaluated by DFCH, TBA-RS and carbonyl test. Antioxidant enzymes were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioquímica; Meio Ambiente; Contaminação metais pesados Antioxidant enzymes; Environmental contamination; Hexavalent chromium; Oxidative stress. Bioquímica. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43771 |
| |
|
|
| LUVIZOTTO,DANICE M.; ARAUJO,JULIANA E.; SILVA,MICHELE DE CÁSSIA P.; DIAS,ARMANDO C. F.; KRAFT,BEATE; TEGETMEYE,HALINA; STROUS,MARC; ANDREOTE,FERNANDO D.. |
| Abstract Mangroves are ecosystems located in the transition zone between land and sea, characterized by periodic flooding that confer to its unique characteristics. Little is known about the transformation of nutrients that occur during the organic matter degradation in this system. In this study, we monitor the nitrogen transformations in soils from three mangroves with distinct levels of contamination using labeled 15NO3-. We also screened the mangroves metagenomes for the presence of genes that encode enzymes involved in denitrification (nirS, nirK, nosZ, norB and narG), anaerobic oxidation of ammonia (anammox) (hh, hao and hzo) and dissimilatory nitrate reduction to ammonium (DNRA) (nrfA). The transformations of 15NO3- indicated the balance of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: N cycling; Anaerobiosis; Metagenome; Environmental contamination. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200503 |
| |
|
|
| Cintra,A.P.R.; Andrade,M.C.G.; Lazarini,M.M.; Assis,D.C.S.; Silva,G.R.; Menezes,L.D.M.; Ornellas,C.B.D.; Figueiredo,T.C.; Cançado,S.V.. |
| ABSTRACT The temperature control in the processing room is one of the major factors associated with the production of safe food with a satisfactory microbiological quality. A total of 288 samples of skinless chicken breast meat were placed in a cutting room, subjected to four different temperatures (12ºC, 14ºC, 16ºC and 18ºC) and collected to evaluate the influence of the room temperature on the microbiological quality during the cutting and boning of chicken breasts. Aerobic mesophilic microorganisms were counted to evaluate the environmental contamination. In addition, coliforms at 35ºC and 45ºC and Staphylococcus spp. were counted, and an analysis for the presence of staphylococcal enterotoxins and Salmonella spp. was performed to determine the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbiological quality; Environmental contamination; Chicken breast meat; Cutting room temperature. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000300814 |
| |
|
|
| Brunetto,Gustavo; Comin,Jucinei Jose; Miotto,Alcione; Moraes,Marcel Pires de; Sete,Paula Beatriz; Schmitt,Djalma Eugênio; Gatiboni,Luciano Colpo; Melo,George Wellington Bastos de; Morais,Gildean Portela. |
| ABSTRACT The purpose of this study was to evaluate Cu and Zn migration and fractions in sandy soil of vineyards. In Urussanga (SC), Brazil, soil samples were collected from a 4-year-old and 15-yearold vineyard, and from a forested area. In the soils, the chemical characteristics of Cu and Zn were analyzed by the EDTA method, which determines the fraction available in soil; 3050B method of the USEPA for total concentrations, which represents the pseudo-soil contents in the soil; and chemical fractionation, which estimates soluble fraction, exchangeable fraction, fraction associated with clay minerals, fraction associated with organic matter and residual fraction. The results show that there is accumulation of Cu and Zn in sandy soils cultivated with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Availability; Chemical fractionation; Toxicity; Environmental contamination; Vitisvinifera. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100141 |
| |
|
|
| Brunetto,Gustavo; Benedet,Lucas; Ambrosini,Vítor Gabriel; Comin,Jucinei Jose; Melo,George Wellington Bastos de; Santos,Matheus Ademir dos; Lourenzi,Cledimar Rogério; Loss,Arcangelo; Belli Filho,Paulo; Schmitt,Djalma Eugênio; Couto,Rafael. |
| ABSTRACT The present study aimed to evaluate the accumulation and distribution of Cu and Zn fractions in the profile of an Inceptisol by application of fungicides with a previous history of apple cultivation in southern Brazil. Stratified soil samples (0.0 – 0.025 m, 0.025 –0.050 m, 0.05 – 0.10 m, 0.10 – 0.15 m, 0.15 – 0.20 m and 0.20 – 0.40 m depth) were collected in two apple orchards (8 years old and 18 years old), and in a native pasture area adjacent to the orchards. The soil was subjected to analysis of physical and chemical properties and to chemical fractionation of Cu and Zn. The fractions of soluble, exchangeable, organic, residual and total Cu and Zn accumulated in the topsoil (0.0 – 0.025 m) of the orchards, being higher in the orchard... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus domestica; Trace elements; Toxicity; Environmental contamination. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200333 |
| |
|
|
| Couto,Rafael da Rosa; Ferreira,Paulo Ademar Avelar; Ceretta,Carlos Alberto; Lourenzi,Cledimar Rogério; Facco,Daniela Basso; Tassinari,Adriele; Piccin,Rogério; Conti,Lessandro De; Gatiboni,Luciano Colpo; Schapanski,Denis; Brunetto,Gustavo. |
| ABSTRACT Applications for long periods of organic animal waste as a source of nutrients to crops can contaminate the soil and the surface and subsurface waters. This study aimed to evaluate how the utilization of organic waste, after successive applications, affects P fractions in the soil and consequently environmental contamination. In an experiment conducted for 8 years, totaling 12 applications with pig slurry manure (PSM), liquid cattle manure (LCM), swine deep bedding (SDB), and mineral fertilizer (NPK), 460; 505; 1.111; and 535 kg P∙ha−1 were added to the soil through PSM, LCM, SDB, and NPK, respectively. In September 2012, soil samples were collected in the layers 0.0 – 0.04; 0.04 – 0.08; 0.08 – 0.12; 0.12 – 0.16; 0.16 – 0.20 m, prepared and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal manure; Availability; P fractionation; Environmental contamination. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100155 |
| |
|
| |
|
|
| Frade,Verônica Maria Fadário; Dias,Meriellen; Teixeira,Antonio Carlos Silva Costa; Palma,Mauri Sergio Alves. |
| Over the past few decades, a high number of pharmaceuticals have been detected in surface, ground and drinking waters. This contamination comes from domestic sewage, livestock, hospitals and chemical-pharmaceutical industries. Typical examples of these pollutants are the fluoroquinolones - powerful antibiotics used in human and veterinary medicine. The presence of fluoroquinolones in the environment can pose a serious threat to the ecosystem and to human health due to their high consumption globally: in 1998, around 120 tons were produced. Even at low environmental concentrations, antibiotics stimulate bacterial resistance. The consequences of the presence of fluoroquinolones in the environment are not fully understood, but are known to be toxic to plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fluoroquinolones/waste/environmental impact; Fluoroquinolones/waste/environmental contamination; Environmental contamination; Advanced oxidation processes/wastewater treatment. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502014000100004 |
| |
|
| |
|
|
| Bellan,Natalia; Pinto,Terezinha de Jesus Andreoli; Kaneko,Telma Mary; Moretto,Lauro Domingos; Santos Junior,Nelson dos. |
| Expired or unused medication at people's homes is normally disposed of in normal garbage, sewage system or, in certain cases, returned to the public health system. There is still no specific legislation regarding this leftover medication to regulate and orient the handling and correct disposal of medication waste. However, there is defined regulation regarding health services' solid waste. This article has the objective of discussing management models for the disposal of medication waste and the recommendations made by pertinent national and international legislation. By means of literature reviews, the management structure for medication waste of international legislation and the regulations regarding the environment, as well as the national legislation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Medications/disposal; Medications/solid waste; Medications/disposal; Sanitary risk; Environmental contamination; National Solid Waste Policy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502012000300018 |
| |
|
|
| Mafra,Maria Sueli Heberle; Lunardi,Willian Galdino; Siegloch,Ana Emilia; Rech,Ângela Fonseca; Rech,Tássio Dresch; Campos,Mari Lucia; Kempka,Aniela Pinto; Werner,Simone Silmara. |
| ABSTRACT: Urban environments are contaminated in many ways with persistent organic and inorganic pollutants as a result of anthropogenic activities, endangering human health and natural resources. The objective of the present study was to evaluate the soil contamination by cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn) in 10 vegetable gardens of urban schools located near or on Botucatu sandstone outcrops of Guarani Aquifer in the urban areas of Lages, Santa Catarina, Brazil. In each garden, three soil samples at each position (in the soil immediately outside and the soil in the garden) were collected at a depth of 0-20 cm. The ISO 11466 method was used to extract the metals. Inductively coupled plasma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmentally sensitive areas; Urban gardens; Environmental contamination. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300252 |
| |
|
|
| Marques,Rosângela Francisca de Paula Vitor; Silva,Antônio Marciano da; Rodrigues,Luciano dos Santos; Coelho,Gilberto. |
| The environmental impact of three different urban solid waste facilities (USWF) on the quality of the surface water. The studied areas were the Campo Belo sanitary landfill (Varões River), the controlled landfill of Santo Antônio do Amparo (Fabiano River), and the closed dump of Elói Mendes (Mutuca River), which are cities located in southern Minas Gerais state, Brazil were evaluated. At each sampling point water samples were collected at five occasions in the raining season (October - March) and in the dry season (April - June) at three sampling points: (P1) upstream the solid waste facility, (P2) downstream nearby the point of influx from the sewage treatment plant in the sanitary landfill, or at the drainage point from the surface flow of the dump and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental contamination; Water quality index; Sanitary landfill; Controlled landfill; Dump. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600010 |
| |
| Registros recuperados: 34 | |
|
|
|
