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| Registros recuperados: 2.860 | |
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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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| Dibble,Eric David; Thomaz,Sidinei Magela. |
| We used a computerized approach to measure spatial complexity for the structural habitat provided by eight aquatic plant species collected from backwater lagoons located in the Upper Paraná River floodplain, Brazil. The plant species were: Cabomba furcata Schult. and Schult.f., Eichhornia azurea (Sw.) Kunth (stems and roots), Eichhornia crassipes (Mart.) Solms, Egeria najas Planchon, Heteranthera cf. zosterifolia, Potamogeton cf pusillus, Utricularia foliosa L., and Nymphaea amazonum Mart. and Zucc. The upper 0.5 m length of the terminal stems was quantified for complexity. Mean frequency and length of the interstices were significantly different among plant species. Spatial complexity varied (F = 17.30; p < 0.0001) among the different plant species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic plant structure; Spatial complexity; Architecture; Habitat heterogeneity. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400010 |
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| Taniguchi,Glória Massae; Bicudo,Denise de Campos; Sennab,Pedro Américo Cabral. |
| The present study aimed to analyse the abiotic characteristics spatial variability in the littoral-limnetic gradient of the Diogo Pond, Mogi-Guaçu River floodplain, as well as evaluating the hydrological influence on the spatial gradient. During the hydrological cycle, four field trips (high water, flood, low water, and drought) were carried out at three sampling stations: littoral, interface, and limnetic region. Analysis of physical and chemical variables allowed to conclude that the time scale established by the hydrological cycle was the main forcing function over the limnological variability of the Diogo Pond. The relative spatial scale related to littoral-limnetic gradient contributed secondarily to the abiotic variability. Littoral was characterized... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxbow lake; Littoral-limnetic gradient; Physical and chemical features. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600016 |
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| Manzoli,José Eduardo; Carvalho,Valdir de Souza; Cerqueira,Eliomar Jacinto Gomes de. |
| Irradiation of samples in peculiar experimental apparatus, subject to radiation spread, requires a special evaluation of absorbed dose implanted to the sample. Indirect calibration of the irradiation source, obtained in a different apparatus, and the spread, usually of very difficult theoretical evaluation, can cause very serious measurement errors, sometimes reaching 50%. In this work, the procedure for dose evaluation in an apparatus for beta irradiation of samples, usually biological ones,is presented, making use of calibration curves, obtained by irradiation in advance of thermoluminescent detectors in air, and so irradiating them in the same position of the sample. An application in blood sample irradiation is also presented. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beta irradiation; Beta dosimetry; Thermoluminescence; Biological irradiation. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000200008 |
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| Miyazawa,Mário; Oliveira,Edson L. de; Parra,Mauro S.; Yamashita,Miyuki. |
| Toxicity and uptake of heavy metals of sewage sludge by beans (Phaseolus vulgaris L.) were evaluated in green house experiments. Treatments consisted of 1,0 ; 2,0 and 5,0% (m/m) of dry sewage sludge, collected from Londrina (Bom Retiro and ETE-Sul) and Curitiba (ETE-Belém and RALF). Bean ( variety IAPAR 57) was sown three times at 0, 120 and 240 days after the treatments have been applied. Contents of Cd, Cr, Co, Cu, Ni, and Pb in bean tissues cultivated with 5,0% (m/m) of all sewage sludge were similar to the control and Ba contents were reduced by increasing the quantity of sewage sludge in the soil. The Zn content in tissue bean incresed from 86 mg kg-1 of control to 462 mg kg-1 by applying 5% (m/m) of sewage sludge in soil, but plant beans did not show... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris L.; Heavy metal; Metal toxicity; Metal fractionation. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100012 |
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| Pinho,Kátia Elisa Prus; Pinho,Antonio Carlos; Pisani,Julio Cesar; Goedert,Carlos Alberto; Gusso,Andreia Magri; Gewehr,Pedro Miguel. |
| Abstract This works aims to assess images obtained with administration of açai juice as compared to a manufactured standard iron oxide-based contrast employed as negative oral agents in Magnetic Resonance Cholangiopancreatography (MRCP), employing qualitative and quantitative evaluation. The research was developed with 64 patients submitted to MRCP exams (on 2 days) in a clinic of Curitiba city (Brazil). First (day 1), a manufactured iron oxide-based contrast (A) was offered and later (day 2), açai juice (contrast B) was given to patients. Radiologists (R1 and R2) evaluated the images, classifying them by a score (1-4). In order to have a quantitative assessment, Image J free software was employed generating plots of gray levels against distance of a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Açai contrast agent; Iron oxide contrast; Magnetic resonance cholangiopancreatography; Image quality; Image J. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100600 |
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| Frydman,Jacques Natan Grinapel; Fonseca,Adenilson de Souza da; Rocha,Vanessa Câmara da; Benarroz,Monica Oliveira; Rocha,Gabrielle de Souza; Pereira,Marcia de Oliveira; Pereira,Mario José; Medeiros,Aldo Cunha; Bernardo-Filho,Mario. |
| This work evaluated the effect of in vitro and in vivo treatment with ASA on the morphology of the red blood cells. Blood samples or Wistar rats were treated with ASA for one hour. Blood samples or animals treated with saline were used as control group. Blood smears were prepared, fixed, stained and the qualitative and quantitative morphology of red blood cells were evaluated under optical microscopy. Data showed that the in vitro treatment for one hour with ASA at higher dose used significantly (p<0.05) modified the perimeter/area ratio of the red blood cells. No morphological alterations were obtained with the in vivo treatment. ASA use at highest doses could interfere on shape of red blood cells. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acetylsalicylic Acid; Blood Cells; Morphology. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300010 |
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| Amaral,Adriana; Takaki,Massanori. |
| The germination of achenes of Bidens pilosa L. was analyzed during the life span of the mother plant. Decrease in the range of achene size was monitored until the senescence of the mother plant when the shortest achenes were harvested. The analysis of the germination percentage confirmed the presence of two distinct classes, formerly defined as short and long ones. Because length can not be used for the separation of those classes, the morphological characteristics of the tegument, specially of the ornament must be used for separation of the achenes with verrucose tegument (formerly named as short achenes) and achenes without ornament of the tegument (formerly named as long achenes). The achenes with verrucose tegument presented dormancy and light... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bidens pilosa; Seed dimorphism; Phytochrome; Seed germination. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000100002 |
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| Registros recuperados: 2.860 | |
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