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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá. |
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Data corrente: |
26/02/2015 |
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Data da última atualização: |
20/03/2017 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ARAUJO, D. M. de F.; ANJOS, C. S. S.; PAIVA, P. M. V. de. |
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Afiliação: |
DANIEL MARCOS DE FREITAS ARAUJO, CPAF-AP; PAULO MARCELO VERAS DE PAIVA, CPAF-AP. |
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Título: |
Potencial de sequestro do carbono em solo pela incorporação de carvão das cascas de frutos da castanha-do-Brasil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE QUÍMICA, 54., 2014, Natal. Anais... Natal: CBQ, 2014. |
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Idioma: |
Português |
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Conteúdo: |
Utilizou-se um ensaio de respirometria para estimar o potencial de sequestro de carbono no solo pela incorporação de carvão das cascas de frutos da castanha-do-brasil. Os carvões produzidos a 350ºC, 450ºC e 550°C foram adicionados ao solo contendo microorganismos e paralelamente em meio abiótico, cujos frascos foram vedados para quantificação da evolução do carvão em CO2. O ensaio foi monitorado por 182 dias verificando-se taxas decrescentes de CO2, cujas curvas apresentaram formato logarítmico. Observou-se que no processo abiótico a formação de CO2 é superior quando comparada ao processo biótico, e que o carvão produzido a 550°C apresenta maior taxa de mineralização que os demais carvões. Além disso, verifica-se que todas as amostras de carvão possuem estabilidade no solo a longo prazo. |
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Palavras-Chave: |
Respirometria. |
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Thesagro: |
Castanha; Residuo orgânico. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/118910/1/CPAF-AP-2014-Potencial-sequestro-do-carbono.pdf
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Marc: |
LEADER 01409nam a2200169 a 4500
001 2009956
005 2017-03-20
008 2014 bl uuuu u00u1 u #d
100 1 $aARAUJO, D. M. de F.
245 $aPotencial de sequestro do carbono em solo pela incorporação de carvão das cascas de frutos da castanha-do-Brasil.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE QUÍMICA, 54., 2014, Natal. Anais... Natal: CBQ$c2014
520 $aUtilizou-se um ensaio de respirometria para estimar o potencial de sequestro de carbono no solo pela incorporação de carvão das cascas de frutos da castanha-do-brasil. Os carvões produzidos a 350ºC, 450ºC e 550°C foram adicionados ao solo contendo microorganismos e paralelamente em meio abiótico, cujos frascos foram vedados para quantificação da evolução do carvão em CO2. O ensaio foi monitorado por 182 dias verificando-se taxas decrescentes de CO2, cujas curvas apresentaram formato logarítmico. Observou-se que no processo abiótico a formação de CO2 é superior quando comparada ao processo biótico, e que o carvão produzido a 550°C apresenta maior taxa de mineralização que os demais carvões. Além disso, verifica-se que todas as amostras de carvão possuem estabilidade no solo a longo prazo.
650 $aCastanha
650 $aResiduo orgânico
653 $aRespirometria
700 1 $aANJOS, C. S. S.
700 1 $aPAIVA, P. M. V. de
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Rondônia. |
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Data corrente: |
03/06/2019 |
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Data da última atualização: |
06/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SIQUEIRA, L. G. B.; ARASHIRO, E. K.; GHETTI, A. M.; SOUZA, E. D.; FERES, L. F.; PFEIFER, L. F. M.; FONSECA, J. F. da; VIANA, J. H. M. |
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Afiliação: |
LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL; EDUARDO K. ARASHIRO, UFF; ALBERTO M. GHETTI, UFF; ELIZA D. SOUZA; LUIZ F. FERES, UNIFENAS; LUIZ FRANCISCO MACHADO PFEIFER, CPAF-RO; JEFERSON FERREIRA DA FONSECA, CNPC; JOAO HENRIQUE MOREIRA VIANA, Cenargen. |
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Título: |
Vascular and morphological features of the corpus luteum 12 to 20 days after timed artificial insemination in dairy cattle. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 102, n. 6, p. 5612-5626, 2019. |
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DOI: |
https://doi.org/10.3168/jds.2018-15853 |
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Idioma: |
Inglês |
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Conteúdo: |
Our objective was to retrospectively compare pregnant versus nonpregnant cattle in terms of vascular and morphometric changes in corpora lutea between d 12 and 20 following timed artificial insemination (TAI). Crossbred (Gir × Holstein) lactating dairy cows (n = 136) and heifers (n = 111) were bred after synchronizing ovulations using an estradiol plus progesterone (P4)-based protocol. Corpus luteum (CL) characteristics (area, echotexture, blood flow) were recorded at 48-h intervals from d 12 to 20 following TAI using an ultrasound equipped with color Doppler. Blood samples were collected to determine CL function (plasma P4). Pregnancy diagnosis was performed at d 30. Quantitative assessment of colored pixels within the CL was performed using ImageJ software (National Institutes of Health, Bethesda, MD) and echotexture was quantified using custom software. Continuous variables such as luteal tissue area (LTA), CL blood flow (CLBF), adjusted CLBF (ratio LTA:CLBF), mean pixel value (MPV), pixel heterogeneity (HETER), and plasma P4 were analyzed retrospectively as repeated measures (d 12 to 20) in pregnant versus nonpregnant females using PROC MIXED (SAS Institute Inc., Cary, NC). Main effects were pregnancy status, day of cycle, and their interaction. Further analyses used only data from d 16, because this was the earliest time point of deviation between CLBF of pregnant and nonpregnant animals. We created quartiles for each variable and calculated the risk of pregnancy within quartile. Differences were determined using the chi-squared test. Plasma P4 was significantly higher in prospective pregnant versus nonpregnant cattle on d 18 and 20, whereas LTA differed only on d 20. On d 16, CLBF and adjusted CLBF diverged between pregnant and nonpregnant, followed by a progressive reduction in the latter until d 20. Mean pixel value was not affected by pregnancy status, but HETER was lower on d 20 in pregnant than in nonpregnant cattle. Likelihood of pregnancy increased from quartile (Q)1 (lowest values) to Q4 (highest) of CLBF (Q4 vs. Q1, odds ratio = 32.8, 95% confidence interval: 9.6 to 112.1) and adjusted CLBF [Q4 vs. Q1, odds ratio = 25.4, 95% confidence interval: 8.1 to 80.4), whereas a lower risk of pregnancy was observed only for animals within Q1 of plasma P4 [Q4 vs. Q1, odds ratio = 3.1, 95% confidence interval: 1.3 to 7.2). Day 16 quartiles of LTA, MPV, and HETER did not affect odds of pregnancy. In conclusion, we identified distinct CLBF patterns as early as 16 d after TAI and confirmed that CL function is lost by a reduction in blood flow, which precedes physical regression. MenosOur objective was to retrospectively compare pregnant versus nonpregnant cattle in terms of vascular and morphometric changes in corpora lutea between d 12 and 20 following timed artificial insemination (TAI). Crossbred (Gir × Holstein) lactating dairy cows (n = 136) and heifers (n = 111) were bred after synchronizing ovulations using an estradiol plus progesterone (P4)-based protocol. Corpus luteum (CL) characteristics (area, echotexture, blood flow) were recorded at 48-h intervals from d 12 to 20 following TAI using an ultrasound equipped with color Doppler. Blood samples were collected to determine CL function (plasma P4). Pregnancy diagnosis was performed at d 30. Quantitative assessment of colored pixels within the CL was performed using ImageJ software (National Institutes of Health, Bethesda, MD) and echotexture was quantified using custom software. Continuous variables such as luteal tissue area (LTA), CL blood flow (CLBF), adjusted CLBF (ratio LTA:CLBF), mean pixel value (MPV), pixel heterogeneity (HETER), and plasma P4 were analyzed retrospectively as repeated measures (d 12 to 20) in pregnant versus nonpregnant females using PROC MIXED (SAS Institute Inc., Cary, NC). Main effects were pregnancy status, day of cycle, and their interaction. Further analyses used only data from d 16, because this was the earliest time point of deviation between CLBF of pregnant and nonpregnant animals. We created quartiles for each variable and calculated the risk of pregnancy within... Mostrar Tudo |
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Palavras-Chave: |
Doppler. |
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Thesaurus NAL: |
Blood flow; Luteolysis; Ultrasonography. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03450naa a2200265 a 4500
001 2117874
005 2024-02-06
008 2019 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.3168/jds.2018-15853$2DOI
100 1 $aSIQUEIRA, L. G. B.
245 $aVascular and morphological features of the corpus luteum 12 to 20 days after timed artificial insemination in dairy cattle.$h[electronic resource]
260 $c2019
520 $aOur objective was to retrospectively compare pregnant versus nonpregnant cattle in terms of vascular and morphometric changes in corpora lutea between d 12 and 20 following timed artificial insemination (TAI). Crossbred (Gir × Holstein) lactating dairy cows (n = 136) and heifers (n = 111) were bred after synchronizing ovulations using an estradiol plus progesterone (P4)-based protocol. Corpus luteum (CL) characteristics (area, echotexture, blood flow) were recorded at 48-h intervals from d 12 to 20 following TAI using an ultrasound equipped with color Doppler. Blood samples were collected to determine CL function (plasma P4). Pregnancy diagnosis was performed at d 30. Quantitative assessment of colored pixels within the CL was performed using ImageJ software (National Institutes of Health, Bethesda, MD) and echotexture was quantified using custom software. Continuous variables such as luteal tissue area (LTA), CL blood flow (CLBF), adjusted CLBF (ratio LTA:CLBF), mean pixel value (MPV), pixel heterogeneity (HETER), and plasma P4 were analyzed retrospectively as repeated measures (d 12 to 20) in pregnant versus nonpregnant females using PROC MIXED (SAS Institute Inc., Cary, NC). Main effects were pregnancy status, day of cycle, and their interaction. Further analyses used only data from d 16, because this was the earliest time point of deviation between CLBF of pregnant and nonpregnant animals. We created quartiles for each variable and calculated the risk of pregnancy within quartile. Differences were determined using the chi-squared test. Plasma P4 was significantly higher in prospective pregnant versus nonpregnant cattle on d 18 and 20, whereas LTA differed only on d 20. On d 16, CLBF and adjusted CLBF diverged between pregnant and nonpregnant, followed by a progressive reduction in the latter until d 20. Mean pixel value was not affected by pregnancy status, but HETER was lower on d 20 in pregnant than in nonpregnant cattle. Likelihood of pregnancy increased from quartile (Q)1 (lowest values) to Q4 (highest) of CLBF (Q4 vs. Q1, odds ratio = 32.8, 95% confidence interval: 9.6 to 112.1) and adjusted CLBF [Q4 vs. Q1, odds ratio = 25.4, 95% confidence interval: 8.1 to 80.4), whereas a lower risk of pregnancy was observed only for animals within Q1 of plasma P4 [Q4 vs. Q1, odds ratio = 3.1, 95% confidence interval: 1.3 to 7.2). Day 16 quartiles of LTA, MPV, and HETER did not affect odds of pregnancy. In conclusion, we identified distinct CLBF patterns as early as 16 d after TAI and confirmed that CL function is lost by a reduction in blood flow, which precedes physical regression.
650 $aBlood flow
650 $aLuteolysis
650 $aUltrasonography
653 $aDoppler
700 1 $aARASHIRO, E. K.
700 1 $aGHETTI, A. M.
700 1 $aSOUZA, E. D.
700 1 $aFERES, L. F.
700 1 $aPFEIFER, L. F. M.
700 1 $aFONSECA, J. F. da
700 1 $aVIANA, J. H. M.
773 $tJournal of Dairy Science$gv. 102, n. 6, p. 5612-5626, 2019.
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