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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
06/01/2014 |
Data da última atualização: |
08/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TOKAREVA, O.; MICHALCZECHEN-LACERDA, V. A.; RECH FILHO, E. L.; KAPLAN, D. L. |
Afiliação: |
OLENA TOKAREVA, TUFTS UNIVERSITY, USA; VALQUÍRIA A. MICHALCZECHEN-LACERDA, UNB; ELIBIO LEOPOLDO RECH FILHO, CENARGEN; DAVID L. KAPLAN, TUFTS UNIVERSITY, USA. |
Título: |
Recombinant DNA production of spider silk proteins. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Microbial Biotechnology, v. 6, n. 6, p. 651-663, 2013. |
Idioma: |
Inglês |
Palavras-Chave: |
Spider dragline silk. |
Thesagro: |
Aranha. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00503naa a2200169 a 4500 001 1974974 005 2023-03-08 008 2013 bl uuuu u00u1 u #d 100 1 $aTOKAREVA, O. 245 $aRecombinant DNA production of spider silk proteins.$h[electronic resource] 260 $c2013 650 $aAranha 653 $aSpider dragline silk 700 1 $aMICHALCZECHEN-LACERDA, V. A. 700 1 $aRECH FILHO, E. L. 700 1 $aKAPLAN, D. L. 773 $tMicrobial Biotechnology$gv. 6, n. 6, p. 651-663, 2013.
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Registro Completo
Biblioteca(s): |
Embrapa Agropecuária Oeste. |
Data corrente: |
18/12/2014 |
Data da última atualização: |
18/12/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SORDI, A.; DIECKOW, J.; BAYER, C.; ALBUQUERQUE, M. A.; PIVA, J. T.; ZANATTA, J. A.; TOMAZI, M.; ROSA, C. M. da; MORAES, A. de. |
Afiliação: |
ANDRÉ SORDI, Programa de Pós-Graduação em Ciência do Solo, UFPR; Jeferson Dieckow, UFPR; Cimélio Bayer, UFRGS; MÁRCIO AMARAL ALBUQUERQUE, Programa de pós-graduação em Ciência do Solo, UFPR; JONATAS THIAGO PIVA, UFSC; JOSILEIA ACORDI ZANATTA, CNPF; MICHELY TOMAZI, CPAO; CARLA MACHADO DA ROSA, UFRGS; Anibal de Moraes, UFPR. |
Título: |
Nitrous oxide emission factors for urine and dung patchesin a subtropical Brazilian pastureland. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 190, p. 94-103, 2014. |
DOI: |
http://dx.doi.org/10.1016/j.agee.2013.09.004 |
Idioma: |
Inglês |
Conteúdo: |
tCattle urine and dung (faeces) patches are nitrous oxide (N2O) sources in pasturelands with impactsin the global N2O budget, but specific information about those emissions are still missing for Braziliansubtropical and tropical regions. We conducted a sequence of 3 field-trials (summer, winter and spring,90 days each) to evaluate the N2O emission and emission factor (EF) after the deposition of 3 volumes ofcattle urine or 3 weights of dung (½, 1 and 1½ time the mean urination volume or defecation weight ofFriesian cows) on a free-drained Cambisol of a subtropical pastureland of Brazil. The N2O emission peaks(3198 g N2O-N m−2h−1after urine in summer was the highest) occurred on average 17 ± 9 days afterapplication (DAA), both for urine and dung, and dropped to the background levels 41 ± 10 DAA of urineand 49 ± 10 DAA of dung. The highest contents of NH4+-N in soil (200?250 mg N kg−1) occurred one dayafter urine application and 10?14 days later for dung (100?200 mg N kg−1). Nitrate peaks occurred from23 to 26 DAA in urine patches (∼40?50 mg N kg−1) and 19?50 DAA in dung patches (∼40?50 mg N kg−1).The N2O emission peaks for urine coincided with soil NH4+-N peak in winter but with soil NO3−-N peakin spring. For dung, the emission peak seemed to be more associated with soil NO3−-N than to NH4+-N,either in winter or spring (inorganic-N was not assessed in summer). It was not possible to concludewhether nitrification or denitrification was the dominant process in N2O production, but it seemed thatboth played relevant roles. The EF for urine, averaged across the seasons, diminished with increments inurine volume, from 0.33% in ½ volume to 0.19% in 1½ volume, possibly because urine percolated deeperinto the soil and proportionally less N remained available for N2O production in the top layer. The EFfor dung was 0.19%, 0.12% and 0.14% for ½, 1 and 1½ weight, respectively, showing no clear trend withincrement in dung weight. The lowest EFs for urine and dung occurred in winter, possibly because oflowest temperatures and soil water-filled pore space. The average EF for dung (0.15%) was lower thanthat of urine (0.26%), because urea-N of urine is more readily available for the hydrolysis than organicN forms of dung. This result suggests that these two excreta should be addressed separately in nationalgreenhouse gases inventories or communications. Our results suggest that the default 2% EF proposed inIPCC Guidelines for cattle excreta are overestimated for subtropical Brazil. MenostCattle urine and dung (faeces) patches are nitrous oxide (N2O) sources in pasturelands with impactsin the global N2O budget, but specific information about those emissions are still missing for Braziliansubtropical and tropical regions. We conducted a sequence of 3 field-trials (summer, winter and spring,90 days each) to evaluate the N2O emission and emission factor (EF) after the deposition of 3 volumes ofcattle urine or 3 weights of dung (½, 1 and 1½ time the mean urination volume or defecation weight ofFriesian cows) on a free-drained Cambisol of a subtropical pastureland of Brazil. The N2O emission peaks(3198 g N2O-N m−2h−1after urine in summer was the highest) occurred on average 17 ± 9 days afterapplication (DAA), both for urine and dung, and dropped to the background levels 41 ± 10 DAA of urineand 49 ± 10 DAA of dung. The highest contents of NH4+-N in soil (200?250 mg N kg−1) occurred one dayafter urine application and 10?14 days later for dung (100?200 mg N kg−1). Nitrate peaks occurred from23 to 26 DAA in urine patches (∼40?50 mg N kg−1) and 19?50 DAA in dung patches (∼40?50 mg N kg−1).The N2O emission peaks for urine coincided with soil NH4+-N peak in winter but with soil NO3−-N peakin spring. For dung, the emission peak seemed to be more associated with soil NO3−-N than to NH4+-N,either in winter or spring (inorganic-N was not assessed in summer). It was not possible to concludewhether nitrification or d... Mostrar Tudo |
Palavras-Chave: |
Fator de emissão; Óxido nitroso; Volume de urina. |
Thesagro: |
Gado; Nitrato; Pastagem. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03449naa a2200301 a 4500 001 2003235 005 2014-12-18 008 2014 bl --- 0-- u #d 024 7 $ahttp://dx.doi.org/10.1016/j.agee.2013.09.004$2DOI 100 1 $aSORDI, A. 245 $aNitrous oxide emission factors for urine and dung patchesin a subtropical Brazilian pastureland.$h[electronic resource] 260 $c2014 520 $atCattle urine and dung (faeces) patches are nitrous oxide (N2O) sources in pasturelands with impactsin the global N2O budget, but specific information about those emissions are still missing for Braziliansubtropical and tropical regions. We conducted a sequence of 3 field-trials (summer, winter and spring,90 days each) to evaluate the N2O emission and emission factor (EF) after the deposition of 3 volumes ofcattle urine or 3 weights of dung (½, 1 and 1½ time the mean urination volume or defecation weight ofFriesian cows) on a free-drained Cambisol of a subtropical pastureland of Brazil. The N2O emission peaks(3198 g N2O-N m−2h−1after urine in summer was the highest) occurred on average 17 ± 9 days afterapplication (DAA), both for urine and dung, and dropped to the background levels 41 ± 10 DAA of urineand 49 ± 10 DAA of dung. The highest contents of NH4+-N in soil (200?250 mg N kg−1) occurred one dayafter urine application and 10?14 days later for dung (100?200 mg N kg−1). Nitrate peaks occurred from23 to 26 DAA in urine patches (∼40?50 mg N kg−1) and 19?50 DAA in dung patches (∼40?50 mg N kg−1).The N2O emission peaks for urine coincided with soil NH4+-N peak in winter but with soil NO3−-N peakin spring. For dung, the emission peak seemed to be more associated with soil NO3−-N than to NH4+-N,either in winter or spring (inorganic-N was not assessed in summer). It was not possible to concludewhether nitrification or denitrification was the dominant process in N2O production, but it seemed thatboth played relevant roles. The EF for urine, averaged across the seasons, diminished with increments inurine volume, from 0.33% in ½ volume to 0.19% in 1½ volume, possibly because urine percolated deeperinto the soil and proportionally less N remained available for N2O production in the top layer. The EFfor dung was 0.19%, 0.12% and 0.14% for ½, 1 and 1½ weight, respectively, showing no clear trend withincrement in dung weight. The lowest EFs for urine and dung occurred in winter, possibly because oflowest temperatures and soil water-filled pore space. The average EF for dung (0.15%) was lower thanthat of urine (0.26%), because urea-N of urine is more readily available for the hydrolysis than organicN forms of dung. This result suggests that these two excreta should be addressed separately in nationalgreenhouse gases inventories or communications. Our results suggest that the default 2% EF proposed inIPCC Guidelines for cattle excreta are overestimated for subtropical Brazil. 650 $aGado 650 $aNitrato 650 $aPastagem 653 $aFator de emissão 653 $aÓxido nitroso 653 $aVolume de urina 700 1 $aDIECKOW, J. 700 1 $aBAYER, C. 700 1 $aALBUQUERQUE, M. A. 700 1 $aPIVA, J. T. 700 1 $aZANATTA, J. A. 700 1 $aTOMAZI, M. 700 1 $aROSA, C. M. da 700 1 $aMORAES, A. de 773 $tAgriculture, Ecosystems and Environment$gv. 190, p. 94-103, 2014.
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