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11.
Porto Rafael Silveira Pinheiro Rafael Silvio Bonilha Rath Susanne 《Environmental science and pollution research international》2021,28(42):59040-59049
Environmental Science and Pollution Research - Benzimidazoles are anthelmintics frequently used in sheep farming due to the high susceptibility of these animals to parasitic diseases. Sheep excreta... 相似文献
12.
Renata de Lima Anderson do Espirito Santo Pereira Raquel Martins Porto Leonardo Fernandes Fraceto 《Journal of Polymers and the Environment》2011,19(1):196-202
This work reports on an analysis of the cyto- and genotoxicity of poly(lactide-co-glycolide) polymer nanoparticles, in an
attempt to evaluate their mutagenic effects. Fibroblast (3T3) and human lymphocyte cell cultures were exposed to solutions
containing three different concentrations of nanoparticles (5.4, 54 and 540 μg/mL, polymer mass/volume of solution). The nanoparticles
were characterized in terms of their hydrodynamic diameters, zeta potentials and polydispersity indices. The morphology of
the particles was determined by atomic force microscopy. The PLGA nanospheres presented a size of 95 nm, a zeta potential
of −20 mV and a spherical morphology. Cellular viability assays using fibroblast cells showed no significant alterations compared
with the negative control. A cytogenetic analysis of human lymphocyte cells showed no significant changes in the mitotic index
in relation to the control, indicating that in the concentration range tested, the particles used in the experimental models
did not present cyto- or genotoxicity. For the tests conducted in this work we can conclude that biodegradable and biocompatible
PLGA nanospheres are not toxic in the cell cultures tested (fibroblast and lymphocyte cells) and in the range of concentrations
employed. The results provide new information concerning the toxic effects of particles produced using PLGA. 相似文献
13.
Anjos Charlene S. Lima Rafaely N. Porto André L. M. 《Environmental science and pollution research international》2021,28(28):37082-37109
Environmental Science and Pollution Research - Neonicotinoids are a class of pesticides widely used in different phases of agricultural crops. Similar to other classes of pesticides, they can... 相似文献
14.
Rodrigues Izabella Almirante Porto Tiburcio Alves Roberta Vianna Guimarães Maria José de Oliveira Cavalcanti Gomes Thiago Santiago Pacheco Elen Beatriz Acordi Vasques 《Environment, Development and Sustainability》2022,24(8):9705-9730
Environment, Development and Sustainability - This review aimed to analyze plastic lumber manufacturing in Brazil, a country with a large amount of natural wood, and devise strategies to boost... 相似文献
15.
Using Fallout Lead-210 Measurements to Estimate Soil Erosion in Three Small Catchments in Southern Italy 总被引:1,自引:0,他引:1
Paolo Porto Des E. Walling Giovanni Callegari Francesco Catona 《Water, Air, & Soil Pollution: Focus》2006,6(5-6):657-667
Soil erosion and associated off-site environmental impacts have attracted increasing attention in recent decades, and there
is a growing need for reliable information on rates of soil loss. The potential for using 137Cs fallout to quantify rates and patterns of soil redistribution over medium-term timescales (ca. 45 years) has been successfully
demonstrated in a wide range of environments around the world. The similar behaviour of fallout 210Pb in soils offers potential for its use as an alternative to 137Cs, in areas where 137Cs inventories are low or are complicated by additional fallout from the Chernobyl accident. There have, however, to date
been few attempts to validate the use of fallout 210Pb measurements for assessing erosion rates. This paper reports an attempt to explore the use of fallout 210Pb to estimate rates of water-induced soil erosion on uncultivated land. It focuses on three small forest/rangeland catchments
located in Calabria, southern Italy, for which measurements of sediment output are available. Comparison of the estimates
of net soil loss from the catchments derived from 210Pb measurements with the measured sediment output, confirmed the validity of the 210Pb approach. The soil redistribution rates estimated using 210Pb measurements were also consistent with equivalent estimates obtained for the same study catchments using 137Cs measurements. 相似文献
16.
Denise Barguil Nepomuceno Denise Vaz Lima Mariel Osório Silva Jhonatas Cley Santos Porto Mitra Mobin 《Environmental monitoring and assessment》2018,190(10):608
This quantitative and qualitative study aimed to evaluate the level of fungal contamination in computer keyboards from an Integrated Health Center (IHC) at Piauí, Brazil, and to evaluate the efficacy of 50% sodium bicarbonate and 50% alcoholic vinegar solutions to eliminate these microorganisms. Ten keyboards from six sectors of the IHC were chosen randomly, and the collection was performed in three situations: (i) before of disinfection, (ii) after disinfection with solution of sodium bicarbonate, and (iii) after disinfection with solution of alcoholic vinegar. Samples were inoculated in Petri dishes with dextrose agar potato plus chloramphenicol and incubated at room temperature for 72 h. All keyboards were contaminated with opportunistic fungi, with Cladosporium cladosporioides (29.4%) being the most frequent species, followed by Curvularia lunata (17.6%) and Aspergillus niger, Alternaria alternata, and Curvularia clavata with 11.8% each. The two solutions were proven to be efficient in eliminating fungal contamination; however, the sodium bicarbonate solution caused esthetic damages in keyboards. In addition, this study is the first report of the antifungal activity of alcoholic vinegar in filamentous fungi. Based on our findings, we suggest a daily disinfection of keyboards with a 50% vinegar solution plus adequate hygiene from the hands of professionals before and after the use of the computer and its annexes, as key actions to reduce nosocomial infections, particularly in economically disadvantaged countries. 相似文献
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18.
In recent years, improvements in point-source depuration technologies have highlighted the problems regarding agricultural
nonpoint (diffuse) sources, and this issue has become highly relevant from the environmental point of view. The considerable
extension of the areas responsible for this kind of pollution, together with the scarcity of funds available to local managers,
make minimizing the impacts of nonpoint sources on a whole basin a virtually impossible task. This article presents the results
of a study intended to pinpoint those agricultural areas, within a basin, that contribute most to water pollution, so that
operations aimed at preventing and/or reducing this kind of pollution can be focused on them. With this aim, an innovative
approach is presented that integrates a field-scale management model, a simple regression model, and a geographic information
system (GIS). The Lake Vico basin, where recent studies highlighted a considerable increase in the trophic state, mainly caused
by phosphorus (P) compounds deriving principally from the intensive cultivation of hazelnut trees in the lake basin, was chosen
as the study site. Using the management model Groundwater Loading Effects of Agricultural Management Systems (GLEAMS), the
consequences, in terms of sediment yield and phosphorus export, of hazelnut tree cultivation were estimated on different areas
of the basin with and without the application of a best management practice (BMP) that consists of growing meadow under the
trees. The GLEAMS results were successively extended to basin scale thanks to the application of a purposely designed regression
model and of a GIS.
The main conclusions can be summarized as follows: The effectiveness of the above-mentioned BMP is always greater for erosion
reduction than for particulate P reduction, whatever the slope value considered; moreover, the effectiveness with reference
to both particulate P and sediment yield production decreases as the slope increases. The proposed approach, being completely
distributed, represents a considerable step ahead compared to the semidistributed or lumped approaches, which are traditionally
employed in research into tools to support the decision-making process for land-use planning aimed at water pollution control. 相似文献
19.
The aim of this study was to assess the value of ultrasonographic evaluation in predicting abnormal karyotypes in fetuses with omphalocele. Forty fetuses with antenatally diagnosed omphalocele and available karyotype results were reviewed. Ultrasound evaluation included herniation contents and size, and the detection of other anomalies. Nine of 40 consecutive fetuses had abnormal karyotypes: trisomy 18 (n = 5), trisomy 13 (n = 3), 47,XXX (n = 1). Only 1/25 with an extracorporeal liver versus 8/15 with an intracorporeal liver had abnormal chromosomes [P = 0·0006, RR = 0·14 (0·02 < RR <0·9)]. Small defects (<3 cm) were associated with abnormal karyotypes [P = 0·01, RR = 4·7 (1·4<RR <15·6)]. Finding concurrent malformations was highly associated with chromosomal anomalies [P = 0·00004, RR = 4·4 (2·3 < RR < 8·5)]. The presence of associated malformations, an intracorporeal liver, and a small herniation size are highly suggestive of an associated abnormal karyotype. 相似文献
20.
Diogo Ferreira da Rocha Marcelo Firpo Porto Tania Pacheco Jean Pierre Leroy 《Sustainability Science》2018,13(3):709-719
This article discusses the experience of the map of conflicts related to environmental injustices and health in Brazil and its potential contribution to international movements for environmental justice. Inventories and maps of environmental injustices are important instruments of struggle against injustice and racism, since they increase the visibility of populations, whose lives are threatened. The Brazilian map is published online since 2010 and was an initiative of FIOCRUZ, a public health and academic institution, and the NGO FASE, in cooperation with the Brazilian Network of Environmental Injustice (RBJA), created in 2001. Environmental justice arised in Brazil as a field of reflection and mobilization, and as a rallying point to identify the struggle of several groups and entities, such as rural and urban grassroots movements, indigenous peoples, traditional populations, and peasants affected by different hazards and risks, as well as environmentalists, trade unions, and scientists. Currently, the map has 570 emblematic environmental conflicts in all regions of Brazil. Many economic activities are causing the conflicts such as mining expansion, oil and gas extractions, infrastructure (roads, mega-dams), agribusiness, and pesticide pollution, often with the support of governmental institutions. 相似文献