Institution
Sao Paulo State University
Education•São Paulo, Brazil•
About: Sao Paulo State University is a education organization based out in São Paulo, Brazil. It is known for research contribution in the topics: Population & Context (language use). The organization has 55715 authors who have published 100436 publications receiving 1375332 citations.
Papers published on a yearly basis
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TL;DR: In this paper, the use of polysaccharides in the form of micro-and nanoparticles, beads and hydrogels is discussed, and the main points are: (1) slow release formulations minimize environmental impact by reducing agrochemical leaching, volatilization and degradation.
Abstract: Agrochemicals are used to improve the production of crops. Conventional formulations of agrochemicals can contaminate the environment, in particular in the case of intensive cropping. Hence, there is a need for controlled-release formulations of agrochemicals such as polysaccharides to reduce pollution and health hazards. Natural polysaccharides are hydrophilic, biodegradable polymers. This article reviews the use of polysaccharides in the form of micro- and nanoparticles, beads and hydrogels. The main points are: (1) slow release formulations minimize environmental impact by reducing agrochemical leaching, volatilization and degradation. For example, 50 % of the encapsulated insecticide chlorpyrifos is released in 5 days, whereas free chlorpyrifos is released in 1 day. (2) Slow release formulations increase the water-holding capacity of soil. (3) Slow release formulations better control weeds in the long run. (4) Polymer-clay formulations store ionic plant nutrients. (5) Polymer hydrogel formulations reduce compaction, erosion, and water run-off. They increase soil permeability and aeration, infiltration rates, and microbial activity, and, in turn, plant performance. In conclusion, polysaccharide formulations can be used for safer use of agrochemicals.
219 citations
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TL;DR: In this paper, the synthesis and characterization of superparamagnetic iron oxide (SPIO) nanoparticles grafted with three different alkoxysilanes (APTES), 3-aminopropyl-ethyl-diethoxysilicane (APDES), and 3-amino-polymorphic-diabetic-diethy-ethoxysile (APES) were addressed.
219 citations
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TL;DR: Although the pulp healing with calcium hydroxide was slower than that of MTA, both materials were successful for pulp capping in human teeth and a lower response of CH30 was observed for the dentin bridge formation when compared with MTA30 and MTA60 groups.
219 citations
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TL;DR: In this article, a survey of Brazilian firms with ISO 14001 certification was conducted to analyze the relationship between green training and green supply chains, and the results indicated that green training is positively correlated with the adoption of green supply chain practices in green purchasing and cooperation with customers.
218 citations
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Universidade Federal de Minas Gerais1, Stanford University2, University of British Columbia3, Sao Paulo State University4, University of Brasília5, Pontifícia Universidade Católica de Minas Gerais6, Federal University of São Carlos7, Universidade Federal de Ouro Preto8, Empresa Brasileira de Pesquisa Agropecuária9
TL;DR: In this article, the authors review the ecological and socio-economic impacts of the catastrophic dam failure in Mariana, Brazil, and propose spatially explicit long-term monitoring frameworks and priority mitigation measures to cope with acute and chronic risks.
Abstract: We review the ecological and socio-economic impacts of the catastrophic dam failure in Mariana, Brazil. Tailing management practices by Samarco mining company ultimately caused a dam breach that abruptly discharged between 55 and 62 million m3 of tailings into the Doce River watershed. On November 5th, 2015, a tsunami of slurry engulfed the small district of Bento Rodrigues, loading the Doce River and its estuary with toxic tailings along a 663.2 km trajectory, extending impacts to the Atlantic coast. Acute ecological impacts will adversely affect livelihoods of more than 1 million people in 41 riparian municipalities by reducing local access to fisheries resources, clean water, crop production sites, hydroelectric power generation and raw materials. The threats to riverine human communities are particularly critical for the disadvantaged populations from remote areas that rely on subsistence agriculture and fisheries, and are uniquely vulnerable to long-term heavy metal exposure. At the landscape scale, we predict multiple negative impacts, ranging from alterations of the genetic diversity of fish populations to long-term vegetation loss and poor regeneration in contaminated areas. Consequently, compromised soil stability and runoff control will increase the risk of further geomorphologic disturbance, including landslides, bank failure and mass movements. We propose spatially explicit long-term monitoring frameworks and priority mitigation measures to cope with acute and chronic risks. We posit that, from a national perspective, disastrous impacts like that of Doce River may become more frequent, given the recent regulatory changes that undermine both institutional governance structures and enforcement of environmental regulation.
218 citations
Authors
Showing all 56201 results
Name | H-index | Papers | Citations |
---|---|---|---|
Russel J. Reiter | 169 | 1646 | 121010 |
Tobin J. Marks | 159 | 1621 | 111604 |
Joseph T. Hupp | 141 | 731 | 82647 |
Luca Lista | 140 | 2044 | 110645 |
Sergio F Novaes | 138 | 1559 | 101941 |
Wagner Carvalho | 135 | 1395 | 94184 |
Alberto Santoro | 135 | 1576 | 100629 |
Andre Sznajder | 134 | 1464 | 98242 |
Luiz Mundim | 133 | 1413 | 89792 |
Eduardo De Moraes Gregores | 133 | 1454 | 92464 |
Helio Nogima | 132 | 1274 | 84368 |
Pedro G Mercadante | 129 | 1331 | 86378 |
D. De Jesus Damiao | 128 | 1162 | 82707 |
Sandra S. Padula | 128 | 1131 | 77174 |
Sudha Ahuja | 127 | 1016 | 75739 |