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| Registros recuperados: 41 | |
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| SÁNCHEZ-REINOSO,Alefsi David; ÁVILA-PEDRAZA,Edgar Alvaro; RESTREPO-DÍAZ,Hermann. |
| ABSTRACT The objective of this review is to show how biochar (BC) can be obtained and its effects on the physicochemical properties of soils and physiological behavior of cultivated plants. Biochar is a product rich in carbon that comes from the pyrolysis of biomass, generally of vegetable origin. It is obtained by the decomposition of organic matter exposed to temperatures between 200-900 °C in an atmosphere with low oxygen availability (pyrolysis), which can be slow, intermediate or fast. BC can contain varying levels of elements such as: carbon, nitrogen, oxygen, hydrogen, and sulfur. The primary sources to produce biochar are the forest, agroindustrial, and manure residues. BC quality and physical-chemical characteristics will depend on the type of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon capture; Mineralization; Plant nutrition; Pyrolysis. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200327 |
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| Gimenes, Karen Zauner; Universidade Federal de São Carlos; Leite-Rossi, Luciene Aparecida; Universidade Federal de São Carlos; Cunha-Santino, Marcela Bianchessi; Universidade Federal de São Carlos; Bianchini Junior, Irineu; Universidade Federal de São Carlos; Trivinho-Strixino, Susana; Universidade Federal de São Carlos. |
| The aim of this study is to evaluate the kinetics of aerobic decomposition of Saccharum officinarum and Talauma ovata leaves. For each species, decomposition chambers (leaves and water) were set up, which were maintained under controlled conditions. Each sampling day (1, 7, 15, 30, 39, 58, 72 and 90 days), the concentrations of total organic carbon, pH and electrical conductivity (EC) were determined in the dissolved fraction, while the mass and cell wall fractions (CWF) were determined in the particulate fraction. The pH stabilization of the chambers with T. ovata and S. officinarum leaves occurred in alkaline (ca. 8 - 8.5) and close to the neutrality (ca. 7 - 7.5) environment, respectively. The EC values were on average 1.6 times higher in incubations... |
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Palavras-chave: 2.05.00.00-9 riparian zone; Mass loss; Mineralization; Dissolved organic carbon; Particulate organic carbon 2.05.00.00-9. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9396 |
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| Li,K.Q.; Jia,S.S.; Ma,M.; Shen,H.Z.; Xu,L.; Liu,G.P.; Huang,S.Y.; Zhang,D.S.. |
| Fluoride, which is often added to toothpaste or mouthwash in order to protect teeth from decay, may be a novel therapeutic approach for acceleration of periodontal regeneration. Therefore, we investigated the effects of fluoride on proliferation and mineralization in human periodontal ligament cells in vitro. The periodontal ligament cells were stimulated with various concentrations of NaF added into osteogenic inductive medium. Immunohistochemistry of cell identification, cell proliferation, alkaline phosphatase (ALP) activity assay, Alizarin red S staining and quantitative real-time-polymerase chain reaction (RT-PCR) were performed. Moderate concentrations of NaF (50-500 μmol/L) had pro-proliferation effects, while 500 μmol/L had the best effects. ALP... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fluoride; Periodontitis; Periodontal ligament cells; Mineralization. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000800601 |
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| Yin,Xiaoxue; Chen,Zhongqiang; Liu,Zhongjun; Song,Chunli. |
| Tissue transglutaminase (type II, TG2) has long been postulated to directly promote skeletal matrix calcification and play an important role in ossification. However, limited information is available on the expression, function and modulating mechanism of TG2 during osteoblast differentiation and mineralization. To address these issues, we cultured the well-established human osteosarcoma cell line SAOS-2 with osteo-inductive conditioned medium and set up three time points (culture days 4, 7, and 14) to represent different stages of SAOS-2 differentiation. Osteoblast markers, mineralization, as well as TG2 expression and activity, were then assayed in each stage. Furthermore, we inhibited TG activity with cystamine and then checked SAOS-2 differentiation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transglutaminase; Osteoblast; Differentiation; Mineralization; Bone morphogenetic protein-2 (BMP-2). |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000800002 |
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| Pereira,Natanael Santiago; Soares,Ismail; Miranda,Fábio Rodrigues de. |
| ABSTRACT: The use of leguminous green manure can be an alternative for the region agricultural systems due to its ability to incorporate significant amounts of nutrients into the soil through decomposition and nutrient release from biomass. This study aimed to evaluate the decomposition rates and nutrient release of six leguminous green manure species ( Crotalaria juncea , Canavalia ensiformes , Cajanus cajan , Crotalaria spectabilis , Dolichos lablab and Mucuna deeringiana ) in an area of the Jaguaribe-Apodi agricultural region, Brazil. Experiment was carried out under field conditions in a randomized block design with five replications. Decomposition and nutrient release from leguminous biomass were monitored by sampling at 30, 60, 90, 120, 150 and 180... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mineralization; Nutrient cycling; Plant residues. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600970 |
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| Córdova Ballona, Georgina. |
| El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos... |
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Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/100 |
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| Córdova Ballona, Georgina. |
| El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos... |
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Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/100 |
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| PARRON, L. M.; BUSTAMANTE, M. M. da C.; PRADO, C. L. C.. |
| RESUMO: A disponibilidade de nitrogênio (N) inorgânico para as plantas, geralmente, depende da taxa de mineralização da matéria orgânica. A biomassa microbiana, além de indicadora da qualidade do solo, está relacionada à disponibilização de nutrientes. Este trabalho objetivou determinar as taxas de mineralização líquida de N e o carbono da biomassa microbiana (CBM) em solos, em um gradiente topográfico de Mata de Galeria no Distrito Federal, por 12 meses. O gradiente comporta três comunidades florísticas: úmida (margem do córrego), intermediária e seca (borda da mata), nas quais a produção líquida de N inorgânico foi 81,5; 29,2 e 25,3 kg N ha (elevado a -1) ano (elevado a -1), respectivamente. A quantidade de N-NO3- disponível na comunidade úmida foi 0,69... |
| Tipo: Folhetos |
Palavras-chave: Microbial flora; Biomassa; Cerrado; Mineralização; Microbiologia do Solo; Nitrificação; Nitrogênio; População Microbiana; Solo; Umidade do Solo; Biomass; Nitrification; Mineralization; Nitrogen; Soil; Soil water content; Soil biology. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568114 |
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| FERNANDES, F. A.; FERNANDES, A. H. B. M.. |
| Um estudo foi conduzido em fazenda do Pantanal Sul Mato-Grossense, visando avaliar as alteracoes nas taxas de mineralizacao de N e nitrificacao liquidas no solo, em consequencia do desmatamento e implantacao de pastagens cultivadas. Foram tomadas dez amostras de solo compostas, em seis epocas a partir da semeadura da graminea, analisados os teores de amonia e nitrato, e calculadas as taxas de mineralizacao e nitrificacao. Os resultados mostraram que o desmatamento e implantacao de pastagem provocou alteracoes significativas na dinamica do nitrogenio do solo, com conteudos menores de amonia e maiores de nitrato, e menores taxas de mineralizacao e nitrificacao liquidas no solo das areas sob pastagem em relacao ao solo das areas sob cerrado nativo. |
| Tipo: Folhetos |
Palavras-chave: Pasture; Mineralização; Nitrogênio; Pastagem; Solo; Pantanal; Nitrogen; Mineralization; Soil. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/793305 |
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| Aminot, Alain; Kerouel, Roger. |
| Dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) measured in deep profiles in the N-E Atlantic and in the N-W Mediterranean in the period 1984-2002 are described. After accurate validation, they show close agreement with those previously published. Classic profiles were obtained, with concentrations decreasing in deep waters. In the Mediterranean and in the Atlantic comparable concentrations were found in the 1500-2000 m waters, 44-46 mumol 1(-1) DOC, 2.6-2.8 mumol 1(-1) DON and 0.02-0.03 mumol 1-1 DOP. In the surface layers, DOC concentrations were higher, but DON and DOP concentrations lower, in the Mediterranean than in the Atlantic, leading to higher element ratios in the Mediterranean. In autumn,... |
| Tipo: Text |
Palavras-chave: N W Mediterranean; N E Atlantic; Mineralization; Non refractory; Refractory; Dissolved organic phosphorus; Dissolved organic nitrogen; Dissolved organic carbon. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-472.pdf |
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| Registros recuperados: 41 | |
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