Consulta: subjectFacets:"Magnesium"
Registros recuperados: 30
Data/hora: 04/06/2024 10:45:59

Identificación de la deficiencia de magnesio en pepino mediante espectroradiometría.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Aguilar Ramírez, María del Rocío.
La utilización de sensores remotos se describe como una técnica de diagnóstico nutrimental promisoria en diferentes aspectos de la agricultura. En este sentido, el presente trabajo tuvo como objetivo determinar estrés por magnesio en pepino, a través de técnicas de percepción remota. Se determinó la reflectancia de hojas recientemente maduras de pepino mediante el uso de Radiómetro, y de imágenes obtenidas con escáner y con cámara digital; también se estimó la concentración de clorofila utilizando un medidor portátil (SPAD 502) y la concentración de magnesio de referencia fue determinada por espectrofotometría de emisión atómica. A partir de estas mediciones se generaron modelos de tipo polinómico, logarítmico y exponencial para relacionar las propiedades...
Palavras-chave: Sensores remotos; Propiedades ópticas; Firmas espectrales; Magnesio; Reflectancia; Remote sensing; Optical properties; Spectral signatures; Magnesium; Reflectance; Maestría; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/401

The effect of magnesium on mitotic spindle formation in Schizosaccharomyces pombe
Provedor de dados: Genetics and Molecular Biology
Autores: Uz,Gulsen; Sarikaya,Aysegul Topal.
Abstract Magnesium (Mg2+), an essential ion for cells and biological systems, is involved in a variety of cellular processes, including the formation and breakdown of microtubules. The results of a previous investigation suggested that as cells grow the intracellular Mg2+ concentration falls, thereby stimulating formation of the mitotic spindle. In the present work, we used a Mg2+-deficient Schizosaccharomyces pombe strain GA2, in which two essential membrane Mg2+ transporter genes (homologs of ALR1 and ALR2 in Saccharomyces cerevisae) were deleted, and its parental strain Sp292, to examine the extent to which low Mg2+ concentrations can affect mitotic spindle formation. The two S. pombe strains were transformed with a plasmid carrying a GFP-α2-tubulin...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Microtubule; Mitosis; Mitotic spindle; Schizosaccharomyces pombe.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300459

Carência de macronutrientes e de boro em plantas de juta (Corchorus capsularis L.), variedade roxa.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VIEGAS, I. de J. M.; HAAG, H. P.; SILVA, J. F. da; MONTEIRO, F. A.
bitstream/item/32693/1/CPATU-BP138.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Macronutriente; Fertilizer; Deficiency; Macronutrient; Potasium; Sulphur.; Adubação; Boro; Cálcio; Deficiência; Enxofre; Fósforo; Juta; Magnésio; Nitrogênio; Potássio.; Boron; Calcium; Jute; Magnesium; Nitrogen; Phosphorus.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380546

Teores de minerais do capim canarana-erecta-lisa (Echinochloa pyramidalis) em três idades.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CAMARAO, A. P.; MATOS, A. de O.; BATISTA, H. A. M.
bitstream/item/34012/1/CPATU-CirTec54.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Canarana-erecta-lisa; Forrageira; Teor; Belem; Pará; Brasil; Grass; Forrage.; Análise; Cálcio; Capim; Fósforo; Gramínea; Magnésio; Potássio.; Amazonia; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383820

Adubação do tomateiro rasteiro no submédio São Francisco.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FARIA, C. M. B. de; PEREIRA, J. R.; COSTA, N. D.; SOARES, J. M.; PINTO, J. M.
O objetivo desse trabalho foi fazer uma apresentação e avaliação dos aspectos técnicos relacionados à prática da adubação associada ao relato e à discussão de resultados de pesquisas obtidos com o tomateiro no Submédio São Francisco.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Tomate rasteiro; Macronutriente; Submédio São Francisco; Sulphur; Micronutrients; Tomato.; Tomate; Adubação; Cálcio; Enxofre; Fósforo; Magnésio; Lycopersicon Esculentum; Nitrogênio; Potássio.; Fertilizer application; Calcium; Magnesium; Nitrogen; Phosphorus; Potassium; Tomatoes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134212

Rendimento de matéria seca e composição química de genótipo de desmodium em Rondônia.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: COSTA, N. de L.; OLIVEIRA, J. R. da C.
O potencial forrageiro de dez genótipos de Desmodium foi avaliado em experimento conduzido em Porto Velho, Rondônia. O delineamento experimental adotado foi o de blocos casualizados com três repetições. Foram avaliados cinco genótipos de D. ovalifolium (CIAT-350, CIAT-3666, CIAT-3673, CIAT-3774 e CIAT-3784), quatro de D. heterophilum (CIAT-349, CIAT-365, CIAT-3782 e CIAT-3791) e um de D. canum (CIAT-3522). No período chuvoso, os maiores rendimentos de matéria seca foram proporcionados por D. ovalifolium CIAT-350, CIAT-3784 e D. canum CIAT-3522. No período seco, o D. ovalifolium CIAT-3673, CIAT-350 e D. canum CIAT-3522 foram os genótipos mais produtivos. Os maiores teores médios de PB foram verificados em D. heterophilum CIAT-349 e CIAT-365, os quais não...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Dry matter.; Cálcio; Digestibilidade; Fósforo; Matéria Seca; Magnésio; Proteína.; Potássio; Calcium; Crude protein; Digestibility; Magnesium; Potassium.; Phosphorus.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/982865

Avaliação de gramíneas forrageiras em área de mangue da Ilha de Marajó.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: NASCIMENTO, C. N. B. do; CARVALHO, L. O. D. de M.; CAMARÃO, A. P.; SALIMOS, E. P.
bitstream/item/31973/1/CPATU-BP93.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Terra inundavel; Intervalo de corte; Marajo; Pará; Brasil; Floodable land; Mangrove; Forage grass; Dry matter; Cut interval.; Cálcio; Fósforo; Gramínea Forrageira; Matéria Seca; Mangue; Magnésio; Potássio; Proteína Bruta.; Amazonia; Crude protein; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383635

Influência de gesso agrícola na reatividade de diferentes frações granulométricas de calcário no solo.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: KURIHARA, C. H.; SILVA, C. J. da; MACHADO, T. M.; SILVA, L. B. X. da.
Reação de calcário no solo; Reação de gesso agrícola no solo; Implicações do uso de gesso associado ao calcário.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Cálcio; Fertilidade do Solo; Gesso; Magnésio; Solubilidade.; Calcium; Magnesium; Plaster; Soil fertility; Solubility.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1080570

Teores de minerais do capim quicuio-da-amazônia (Brachiaria humidicola) em três idades.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MATOS, A. de O.; CAMARAO, A. P.; BATISTA, H. A. M.
bitstream/item/57872/1/CPATU-ComTec60.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Quicuio-da-amazônia; Teor; Belém; Pará; Brasil; Grass; Analysis.; Análise; Brachiaria Humidicola; Cálcio; Fósforo; Gramínea; Magnésio; Mineral; Potássio.; Amazonia; Calcium; Magnesium; Phosphorus; Potassium.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383761

Girassol: nutricao mineral e adubacao.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: SFREDO, G. J.; CAMPO, R. J.; SARRUGE, J. R.
Exigencias nutricionais; Efeitos dos nutrientes essenciais; Calagem e adubacao.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Nutricao mineral; Brasil; Sunflower; Fertilization; Sulphur.; Adubação; Calagem; Boro; Cálcio; Cobre; Ferro; Enxofre; Fósforo; Girassol; Magnésio; Manganês; Nitrogênio; Molibdênio; Potássio; Zinco.; Brazil; Boron; Copper; Calcium; Liming; Magnesium; Manganese; Iron; Nutrition; Molybdenum; Nitrogen; Phosphorus; Potassium; Zinc.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/445619

O magnesio na fertilidade dos solos do cerrado.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: REIN, T. A.; SOUSA, D. M. G. de.
bitstream/item/121729/1/gtec-52.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Defensivos; Inoculation; Lentil; Pea.; Cerrado; Ervilha; Fertilidade do Solo; Inoculação; Lens Culinaris; Legume; Leguminosa; Leguminosae; Lentilha; Magnésio; Nodulação; Pisum Sativum; Semente; Tratamento.; Magnesium; Inoculation methods; Nodulation; Soil fertility.; Seeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546143

Adubação do tomateiro rasteiro no submédio São Francisco.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FARIA, C. M. B. de; PEREIRA, J. R.; COSTA, N. D.; SOARES, J. M.; PINTO, J. M.
Introdução; Solo; Absorção de nutrientes; Adubação e função dos nutrientes na colheita; Nitrogênio; Fósforo; Potássio; Cálcio; Micronutrientes; Conlusões; referências bibliográficas.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Macronutriente; Brasil; Submédio São Francisco; Sulphur; Micronutrients.; Adubação; Cálcio; Enxofre; Fósforo; Lycopersicon Esculentum; Magnésio; Nitrogênio; Potássio; Tomate.; Fertilizer application; Brazil; Calcium; Magnesium; Potassium; Phosphorus; Nitrogen; Tomatoes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510594

Principais deficiências minerais em bovinos de corte.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: MORAES, S. da S.
Deficiências e desequilíbrios minerais em bovinos são descritas em quase todas as regiões do mundo. Os elementos minerais comumente deficientes para bovinos com dieta exclusiva de pasto são: P, Na, I, Cu, Co, e Se. Em algumas regiões sob condições especificas, Ca, Mg e Mn. Por outro lado, Fe e Mn estão, normalmente, em excesso nas regiões do Cerrado Central do Brasil e Pantanal. A ingestão de dietas deficientes ou desequilibradas de elementos minerais torna mais difícil a manutenção de concentrações ótimas nos tecidos . No inicio, causa lesões bioquímicas que induzem a trocas nas formas de funcionamento, concentração e atividade do elemento nos fluidos e tecidos do corpo. Essas alterações diferem conforme os elementos e suas funções, com o grau de duração...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Bovino de corte; Brasil; Mineral deficiencies; Sulphur; Yodine.; Cálcio; Cloro; Cobre; Cobalto; Deficiência Mineral; Ferro; Enxofre; Fósforo; Manganês; Magnésio; Iodo; Potássio; Selênio; Sódio; Zinco.; Calcium; Cobalt; Copper; Brazil; Beef cattle; Chlorine; Iron; Magnesium; Manganese; Phosphorus; Potassium; Sodium; Selenium; Zinc.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325198

Nutrientes nos solos de floresta primária e pastagem de Brachiaria humidicola na Amazônia Central.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: TEIXEIRA, L. B.; BASTOS, J. B.
bitstream/item/31994/1/CPATU-BP98.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Yelow latosol; Ecosystem.; Brachiaria Humidicola; Cálcio; Ecossistema; Fósforo; Latossolo; Latossolo Amarelo; Magnésio; Potássio; Solo.; Calcium; Magnesium; Potassium; Phosphorus; Soil.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381186

Cation dynamics in soils with different salinity levels growing irrigated rice
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Carmona,Felipe de Campos; Anghinoni,Ibanor; Holzschuh,Marquel Jonas; Andrighetti,Marcelo Hoerbe.
Salinity levels in soils of the Outer Coastal Plain of Rio Grande do Sul, Brazil, can be high, due to excess of Na in the irrigation water, evapotranspiration and soil development from marine sediments. The cultivation of irrigated rice could be an alternative, since ion uptake as well as leaching by the establishment of a water layer could mitigate the effects of soil salinity. This study aimed to evaluate the dynamics of basic cations in the solution of Albaqualf soils with different salinity levels growing irrigated rice. The plow layer contained exchangeable Na percentages (ESP) of 5.6, 9.0, 21.2 and 32.7 %. The plant stand, dry matter, Na, K and Ca + Mg uptake at full flowering and grain yield were evaluated. The levels of Na, K, Ca + Mg and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exchangeable sodium percentage; Potassium; Calcium; Magnesium; Electrical conductivity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600009

Classical Methods and Calculation Algorithms for Determining Lime Requirements
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Guarçoni,André; Sobreira,Fabrício Moreira.
ABSTRACT The methods developed for determination of lime requirements (LR) are based on widely accepted principles. However, the formulas used for calculation have evolved little over recent decades, and in some cases there are indications of their inadequacy. The aim of this study was to compare the lime requirements calculated by three classic formulas and three algorithms, defining those most appropriate for supplying Ca and Mg to coffee plants and the smaller possibility of causing overliming. The database used contained 600 soil samples, which were collected in coffee plantings. The LR was estimated by the methods of base saturation, neutralization of Al3+, and elevation of Ca2+ and Mg2+ contents (two formulas) and by the three calculation algorithms....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PH; Calcium; Magnesium; Deficiency; Overliming.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100504

Influence of rootstock on nutrient content in grape petioles
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Dalbó,Marco Antonio; Schuck,Enio; Basso,Clori.
Genetic diversity of rootstocks can affect nutrient uptake and the nutrient status of grapevines. The rootstock influence on nutrient content in grape petioles was evaluated on three rootstocks competition experiments carried out at Vale do Rio do Peixe region, in the state of Santa Catarina, Brazil, with the cultivars Niagara Rosada, Concord, and Isabella, grafted on different rootstocks. Two soil liming depths were also evaluated in the Isabella experiment. The greatest rootstock effect was observed on K and Mg content and K/Mg ratio in the petioles. The Vitis vinifera x V. rotundifolia hybrid rootstocks VR 043-43 and VR 044-4 provided the highest K/Mg values and self rooted Isabella the lowest K/Mg ratio. The other tested rootstocks resulted in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mineral nutrition; Viticulture; Potassium; Magnesium.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000300030

Osmolality and ions of the perivisceral coelomic fluid of the intertidal sea urchin Echinometra lucunter (Echinodermata: Echinoidea) upon salinity and ionic challenges
Provedor de dados: Revista Brasileira de Zoologia
Autores: Freire,Carolina A; Santos,Ivonete A; Vidolin,Denilton.
The intertidal sea-urchin Echinometra lucunter (Linnaeus, 1758) has been submitted to diluted sea water (SW) of salinity 25, or concentrated sea water of salinity 45. In addition, ionic challenges have been offered, supplementing 25 SW with Mg2+, Ca2+ or K+, until the concentration of each of these ions would reach the level of full-strength 35 SW (control). Perivisceral coelomic fluid has been sampled after six hours in these treatments for measurements of osmolality and concentrations of Na+, Cl-, Mg2+, Ca2+, and K+. Urchins have been further observed until five days. SW concentration (45) lead urchins to death after two days of exposure, while urchins tolerated five days in 25 SW without any sign of distress. Urchins displayed osmoconformation and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Ionic gradients; Magnesium; Osmoconformation; Potassium; Stenohalinity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400009

Magnesium sulphate and the development of the common bean cultivated in an Ultisol of Northeast Australia
Provedor de dados: Scientia Agricola
Autores: Oliveira,Itamar Pereira de; Asher,Colin J.; Edwards,David G.; Santos,Renato S. Mota dos.
Magnesium applications (MgS0(4).7H(2)0) to achieve 8 and 16 mmol c/cm3 of Mg (324 and 1284 kg of MgS0(4) ha-1) were made on one Ultisol from Australia Northeast to correct Mg deficiency in plants and to verify the optimum level of Mg to grow common bean (Phaseolus vulgaris L). Magnesium was applied together with lime, N, K, Cu, Zn, B, and Mo as calcium carbonate, ammonium nitrate, potassium phosphate, cupric and zinc sulphate, boric acid and sodium molybdate respectively a month before planting and P as phosphoric acid at the planting. The pH reached the equilibrium after six weeks of incubation. Higher electrical conductivity (EC) was observed in soil where Mg was applied to reach 8 mmol c/cm3 in the absence of common bean and 16 mmol c/cm3 when the plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Plant height; Soil pH; Electrical conductivity.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100025

Total soil electrical conductivity and critical soil K+ to Ca2+ and Mg2+ ratio for potato crops
Provedor de dados: Scientia Agricola
Autores: Reis Jr.,Roberto Anjos; Fontes,Paulo Cezar Rezende; Neves,Júlio Cesar Lima; Santos,Nerilson Terra.
Soil K+ to Ca2+ and Mg2+ ratio as well as the total salinity were evaluated in response to potassium fertilizer application onto potato. Potassium was applied at six different rates (0, 60, 120, 240, 480 and 960 kg ha-1 of K2O), as K2SO4, and was placed during planting time in the furrow. Soil from the 0-200 mm layer was collected in the furrow, 20 and 48 days after plant emergence (DAE) to evaluate soil pH, K+, Ca2+ and Mg2+ contents and the total electrical conductivity (EC). A factorial design (6x2), with six K rates and two sampling times was set up in a randomized block design with four replications. The application of K fertilizer increased exchangeable K, did not affect pH and exchangeable Ca and Mg contents, but caused a linear increase of the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Potassium; Calcium; Magnesium; Salinity.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000400030

Alterações em atributos químicos do solo pela aplicação de calcário na superfície ou incorporado - DOI: 10.4025/actasciagron.v30i2.1738
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Freiria, André Costa; UNESP; Mantovani, José Ricardo; Universidade José do Rosario vellano; Ferreira, Manoel Evaristo; UNESP; Cruz, Mara Cristina Pessôa da; UNESP; Yagi, Renato; UNESP.
A aplicação de calcário, na superfície do solo, é necessária em algumas situações agrícolas. O objetivo desse trabalho foi verificar alterações em atributos químicos de um solo de textura média, em razão da aplicação de calcário na superfície ou incorporado. O experimento foi conduzido em condições de laboratório, em colunas de PVC, delineamento inteiramente ao acaso, em esquema fatorial 2 x 4 e uma testemunha, com quatro repetições. Os tratamentos consistiram na combinação de duas doses de calcário (4 e 2 t ha-1) e 4 formas de aplicação do corretivo (aplicado na superfície, sem incorporação, e calcário incorporado nas profundidades de 0 a 5; 0 a 10 e 0 a 20 cm), além da testemunha em que não foi feita a calagem. Após 326 dias de incubação do solo com o...
Palavras-chave: 5.01.01.00-5    Ciência do Solo calagem; Acidez do solo; PH; Saturação por bases; Cálcio; Magnésio 5.01.01.00-5    Ciência do Solo liming; Soil acidity; PH; Base saturation; Calcium; Magnesium.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1738

Prevalência de hipocalcemia e hipomagnesemia em equinos com distúrbios gastrintestinais
Provedor de dados: Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Autores: Coelho,C.S.; Fonseca,L.A.; Souza,V.R.C.
The prevalence of hypocalcemia and hypomagnesemia was evaluated in horses with gastrointestinal diseases. For that, 12 animals were examined at the UVV Veterinary Hospital. Age and gender of the animals, as well breed clinical diagnosis, adopted therapy and outcomes were recorded. Serum determinations of total calcium and magnesium were done on the day of admission and during the period of hospitalization. They revealed the presence of low levels of calcium and magnesium. The comparison between survivals and non-survivals on the admission day had shown a significant result only for serum calcium.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Magnesium; Colic; Horses; Cálcio; Magnésio; Cólica; Cavalos.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000300030

Comparative effect of ion calcium and magnesium in the activation and infection of the murine macrophage by Leishmania major
Provedor de dados: Biological Research
Autores: LANZA,HENRIQUE; AFONSO-CARDOSO,SANDRA R; SILVA,ADRIANO G; NAPOLITANO,DANIELLE R; ESPÍNDOLA,FOUED S; PENA,JANETHE D.O; SOUZA,MARIA A.
Amastigotes of Leishmania major have a great ability to evade destruction in host cells. This study investigated the activation in resident, inflammatory macrophages and J774 cells in vitro treated with lipopolysaccharide (LPS), soluble Leishmania antigen (SLA), calcium ionophore (CaI) and magnesium (Mg2+) alone or combined. An increase in nitric oxide (NO) production was observed in J774 or inflammatory macrophages treated with LPS alone or in combination with SLA and CaI. The same treatments did not affect the NO release by resident macrophages. There was no interference in uptake of L. major but CaI decreased intracellular proliferation of the parasite. This study demonstrated the importance of CaI in decreasing L. major proliferation inside murine...
Tipo: Journal article
Palavras-chave: Calcium; Leishmania major; Macrophage; Magnesium; Nitric oxide.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300004

Effect of inoculation associated to leaf sprayed Co+Mo on the yield and grain nutrients in common bean (Phaseolus vulgaris L)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Berton Junior,João Francisco; Santos,Julio Cesar Pires; Coelho,Cileide Maria Medeiros; Klauberg Filho,Osmar.
The objective of this work was to evaluate the efficiency of nitrogen fixing inoculum associated with Co + Mo leaf spray on the common bean grain yield and grain nutrients, cv. FT Nobre. Three dosages of the inoculant (0, 200 and 400 g/50 kg seeds), combined with four Co + Mo leaf spray levels (T0=0,0; T1=4.9,49; T2=7.3,73; and T3=9.7,97 g ha-1 of Co and Mo, respectively) were tested. The grain yield with the use of the inoculant (400 g / 5O kg seed-1) associated with the higher level of Co+Mo (T2 and T3) was very similar to the mineral nitrogen condition fertilizer recommended for the bean (70 kg ha-1 of N). With the increased inoculant dosage, an increase of the protein content and of P and Mg in the grain was also observed. The results indicated that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed quality; Phosphorus; Magnesium; Nitrogen.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600002

Exchangeable basic cations and nitrogen distribution in soil as affected by crop residues and nitrogen
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Rosolem,Ciro Antonio.
In this work, a greenhouse experiment was conducted to study the effects of N fertilization and residues of pearl millet, black oats and oilseed radish on pH and Ca, Mg, K, NO3-, and NH4+ distribution within the profile of a Distroferric Red Latosol. The equivalent of 8 t ha-1 of plant residues were placed on soil surface. Lime was applied on the soil surface and nitrogen was applied over the straw at 0, 50, 100, and 150 mg kg-1, as ammonium nitrate. Corn was grown for 57 days. Calcium contents and pH in the soil profile were decreased by Pearl millet residue, while black oat and oilseed radish increased Ca contents and these effects are not related with Ca contents in residue tissue. However, the presence of plant residues increased nitrate, ammonium, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Magnesium; Nitrogen; Potassium; Soil bases; No till.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000300003

Effect of magnesium ion on human osteoblast activity
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: He,L.Y.; Zhang,X.M.; Liu,B.; Tian,Y.; Ma,W.H.
Magnesium, a promising biodegradable metal, has been reported in several studies to increase bone formation. Although there is some information regarding the concentrations of magnesium ions that affect bone remodeling at a cellular level, little is known about the effect of magnesium ions on cell gap junctions. Therefore, this study aimed to systematically investigate the effects of different concentrations of magnesium on bone cells, and further evaluate its effect on gap junctions of osteoblasts. Cultures of normal human osteoblasts were treated with magnesium ions at concentrations of 1, 2 and 3 mM, for 24, 48 and 72 h. The effects of magnesium ions on viability and function of normal human osteoblasts and on gap junction intercellular communication...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Osteoblast; Gap junction intercellular communication.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000700604

Inhibitory effect of high [Mg2+] on the vasopressin-stimulated hydroosmotic permeability of the isolated perfused cortical collecting duct
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Falkenstein,D.; Ribeiro,C.A.L.; Figueiredo,J.F.
High magnesium concentration inhibits the effect of arginine vasopressin (AVP) on smooth muscle contraction and platelet aggregation and also influences hepatocyte AVP receptor binding. The aim of this study was to determine the role of magnesium concentration [Mg2+] in AVP-stimulated water transport in the kidney collecting duct. The effect of low and high peritubular [Mg2+] on the AVP-stimulated osmotic water permeability coefficient (Pf) was evaluated in the isolated perfused rabbit cortical collecting duct (CCD). Control tubules bathed and perfused with standard Ringer bicarbonate solution containing 1 mM Mg2+ presented a Pf of 223.9 ± 27.2 µm/s. When Mg2+ was not added to the bathing solution, an increase in the AVP-stimulated Pf to 363.1 ± 57.2 µm/s...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Cortical collecting ducts; Magnesium; Arginine vasopressin; Osmotic water permeability.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999000800016

Improved biological performance of magnesium by micro-arc oxidation
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Ma,W.H.; Liu,Y.J.; Wang,W.; Zhang,Y.Z.
Magnesium and its alloys have recently been used in the development of lightweight, biodegradable implant materials. However, the corrosion properties of magnesium limit its clinical application. The purpose of this study was to comprehensively evaluate the degradation behavior and biomechanical properties of magnesium materials treated with micro-arc oxidation (MAO), which is a new promising surface treatment for developing corrosion resistance in magnesium, and to provide a theoretical basis for its further optimization and clinical application. The degradation behavior of MAO-treated magnesium was studied systematically by immersion and electrochemical tests, and its biomechanical performance when exposed to simulated body fluids was evaluated by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Micro-arc oxidation; Biodegradable; Biocompatibility; Mechanical properties; Corrosion.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000300214

Hypomagnesemia in critically ill cancer patients: a prospective study of predictive factors
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Deheinzelin,D.; Negri,E.M.; Tucci,M.R.; Salem,M.Z.; Cruz,V.M. da; Oliveira,R.M.; Nishimoto,I.N.; Hoelz,C.
Hypomagnesemia is the most common electrolyte disturbance seen upon admission to the intensive care unit (ICU). Reliable predictors of its occurrence are not described. The objective of this prospective study was to determine factors predictive of hypomagnesemia upon admission to the ICU. In a single tertiary cancer center, 226 patients with different diagnoses upon entering were studied. Hypomagnesemia was defined by serum levels &lt;1.5 mg/dl. Demographic data, type of cancer, cause of admission, previous history of arrhythmia, cardiovascular disease, renal failure, drug administration (particularly diuretics, antiarrhythmics, chemotherapy and platinum compounds), previous nutrition intake and presence of hypovolemia were recorded for each patient. Blood...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Magnesium deficiency; Intensive care unit; Electrolytes; Surgery; Dietary habits; Postoperative patient.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000001200007

Antinociceptive potency of aminoglycoside antibiotics and magnesium chloride: a comparative study on models of phasic and incisional pain in rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Prado,W.A.; Machado Filho,E.B.
A close relationship exists between calcium concentration in the central nervous system and nociceptive processing. Aminoglycoside antibiotics and magnesium interact with N- and P/Q-type voltage-operated calcium channels. In the present study we compare the antinociceptive potency of intrathecal administration of aminoglycoside antibiotics and magnesium chloride in the tail-flick test and on incisional pain in rats, taken as models of phasic and persistent post-surgical pain, respectively. The order of potency in the tail-flick test was gentamicin (ED50 = 3.34 µg; confidence limits 2.65 and 4.2) &gt; streptomycin (5.68 µg; 3.76 and 8.57) = neomycin (9.22 µg; 6.98 and 12.17) &gt; magnesium (19.49 µg; 11.46 and 33.13). The order of potency to reduce...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gentamicin; Neomycin; Streptomycin; Magnesium; Antinociception; Aminoglycosides; Pain.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000300017