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Biblioteca(s):  Embrapa Meio Ambiente.
Data corrente:  13/04/2015
Data da última atualização:  13/04/2015
Tipo da produção científica:  Artigo em Periódico Indexado
Autoria:  SOARES, J. R; CANTARELLA, H.; VARGAS, V. P; CARMO, J. B. do; MARTINS, A. A; SOUSA, R. de M.; ANDRADE, C. A. de.
Afiliação:  JOHNNY RODRIGUES SOARES, IAC; HEITOR CANTARELLA, IAC; VITOR PAULO VARGAS, IAC; JANAINA BRAGA DO CARMO, IAC; ACACIO AGOSTINHO MARTINS, IAC; RAFAEL DE MELO SOUSA, IAC; CRISTIANO ALBERTO DE ANDRADE, CNPMA.
Título:  Enhanced-efficiency fertilizers in nitrous oxide emissions from urea applied to sugarcane.
Ano de publicação:  2015
Fonte/Imprenta:  Journal of Environmental Quality, Madison, v. 44. n. 2, p. 423-430, 2015.
Idioma:  Inglês
Conteúdo:  Abstract: The environmental benefits of producing biofuels from sugarcane have been questioned due to greenhouse gas emissions during the biomass production stage, especially nitrous oxide (N2O) associated with nitrogen (N) fertilization. The objective of this work was to evaluate the use of nitrification inhibitors (NIs) dicyandiamide (DCD) and 3,4 dimethylpyrazole phosphate (DMPP) and a controlled-release fertilizer (CRF) to reduce N2O emissions from urea, applied at a rate of 120 kg ha?1 of N. Two field experiments in ratoon cycle sugarcane were performed in Brazil. The treatments were (i) no N (control), (ii) urea, (iii) urea+DCD, (iv) urea+DMPP, and (v) CRF. Measurements of N2O fluxes were performed using static chambers with four replications. The measurements were conducted three times per week during the first 3 mo and biweekly afterward for a total of 217 and 382 d in the first and second seasons, respectively. The cumulative N2O?N emissions in the first ratoon cycle were 1098 g ha?1 in the control treatment and 1924 g ha?1 with urea (0.7% of the total N applied). Addition of NIs to urea reduced N2O emissions by more than 90%, which did not differ from those of the plots without N. The CRF treatment showed N2O emissions no different from those of urea. The results were similar in the second ratoon: the treatment with urea showed N2O emissions of 0.75% of N applied N. Application of NIs resulted in a strong reduction in N2O emissions, but CRF increased emissions comp... Mostrar Tudo
Palavras-Chave:  Óxido nítrico.
Thesagro:  Cana de açúcar; Fertilizante; Impacto ambiental; Ureia.
Thesaurus Nal:  Environmental impact; Greenhouse effect; Nitrogen fertilizers; Nitrous oxide; Sugarcane; Urea.
Categoria do assunto:  P Recursos Naturais, Ciências Ambientais e da Terra
URL:  https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/1013414/1/2014AP65.pdf
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Meio Ambiente (CNPMA)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPMA14058 - 1UPCAP - DD
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Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br.

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Biblioteca(s):  Embrapa Instrumentação.
Data corrente:  25/09/2023
Data da última atualização:  25/09/2023
Tipo da produção científica:  Artigo em Periódico Indexado
Circulação/Nível:  A - 1
Autoria:  GRIZZO, A.; SANTOS, D. M. dos; COSTA, V. P. V. da; LOPES, R. G.; INADA, N. M.; CORREA, D. S.; CAMPANA-FILHO, S. P.
Afiliação:  Sao Carlos Institute of Chemistry/University of Sao Paulo; Nanotechnology National Laboratory for Agriculture (LNNA); Center for Exact Sciences and Technology, Federal University of Sao Carlos (UFSCar); Sao Carlos Institute of Physics/University of Sao Paulo; Sao Carlos Institute of Physics/University of Sao Paulo; DANIEL SOUZA CORREA, CNPDIA; CAMPANA-FILHO, S. P., Sao Carlos Institute of Chemistry/University of Sao Paulo.
Título:  Multifunctional bilayer membranes composed of poly(lactic acid), beta-chitin whiskers and silver nanoparticles for wound dressing applications.
Ano de publicação:  2023
Fonte/Imprenta:  International Journal of Biological Macromolecules, v. 251, 126314, 2023.
ISSN:  0141-8130
DOI:  https://doi.org/10.1016/j.ijbiomac.2023.126314
Idioma:  Inglês
Conteúdo:  Nanomaterial-based wound dressings have been extensively studied for the treatment of both minor and lifethreatening tissue injuries. These wound dressings must possess several crucial characteristics, such as tissue compatibility, non-toxicity, appropriate biodegradability to facilitate wound healing, effective antibacterial activity to prevent infection, and adequate physical and mechanical strength to withstand repetitive dynamic forces that could potentially disrupt the healing process. Nevertheless, the development of nanostructured wound dressings that incorporate various functional micro- and nanomaterials in distinct architectures, each serving specific purposes, presents significant challenges. In this study, we successfully developed a novel multifunctional wound dressing based on poly(lactic acid) (PLA) fibrous membranes produced by solution-blow spinning (SBS) and electrospinning. The PLA-based membranes underwent surface modifications aimed at tailoring their properties for utilization as effective wound dressing platforms. Initially, beta-chitin whiskers were deposited onto the membrane surface through filtration, imparting hydrophilic character. Afterward, silver nanoparticles (AgNPs) were incorporated onto the beta-chitin layer using a spray deposition method, resulting in platforms with antimicrobial properties against both Staphylococcus aureus and Escherichia coli. Cytotoxicity studies demonstrated the biocompatibility of the membranes with the neonatal hu... Mostrar Tudo
Palavras-Chave:  Beta-chitin whiskers; Biocompatible material; Electrospun nanofibers; Natural polymer; Solution blow spinning; Wound dressing.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Instrumentação (CNPDIA)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status
CNPDIA18277 - 1UPCAP - DDPROCI.23/872023/92
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