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Registros recuperados: 16
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Bean cultivation in a subsistence farming system in the northeast of São Paulo state - Brazil Scientia Agricola
Oliveira,Wladecir Salles de; Tsai,Siu Mui.
The colonization of the State of São Paulo, Brazil of the northeastern region, is related to historical movements, such as "tropeirismo" (séc. XVIII and XIX) and Italian immigration (séc. XIX). The agriculture presently practices used by farmers descendent of immigrants does not differ from the techniques used at the beginning of the century. In the Cunha region of the Atlantic Rain Forest ecosystem poor bean yield associated with low fertilizer input, plant disease and soil erosion led to slash-and-burn farming. This work is an attempt at identifying sustainable farming practices that would minimize bean disease and maximize nitrogen assimilation. For that purpose soil fertility and plant cultivar were studied under standard agronomic practices to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phaseolus vulgaris; Rhizobium tropici; Landrace; Lime; Molybdenum.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000200008
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Biodistribution of 99Mo in rats BABT
Souza,Raphael Sancho Sisley de; Ribeiro,Bianca da Silva; Dantas,Ana Letícia Almeida; Bernardo Filho,Mario; Dantas,Bernardo Maranhão.
The modification of 99Mo standard metabolism in the presence of MDP would alter the dosimetry of this radionuclide in nuclear medicine patients. Therefore, the objective of this work is to evaluate the influence of MDP in the biodistribution of 99Mo. Wistar rats were divided in two groups of six animals, being inoculated respectively 99Molibdate and 99Mo+MDP via plex ocular. The biodistribution study was carried out after 10 and 120 minutes respectively. The organs were counted with a NaI(Tl) detector. The uptake values did not present significant differences among the groups. An in vitro study through planar chromatography was carried out to determine the affinity between molybdenum and MDP. The results show that 99Mo has low affinity both to propanone...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wistar; Molybdenum; Nuclear Medicine.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000700029
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Control of Acid Phosphatases Expression from Aspergillus niger by Soil Characteristics BABT
Nahas,Ely.
ABSTRACTThis work studied the acid phosphatase (APase) activity from culture medium (extracellular, eAPase) and mycelial extract (intracellular, iAPase) ofAspergillus niger F111. The influence of fungus growth and phosphate concentration of the media on the synthesis and secretion of phosphatase was demonstrated. The effects of pH, substrate concentration and inorganic and organic compounds added to the reaction mixture on APase activity were also studied. Both enzymes were repressed by high concentrations of phosphate. Overexpression of iAPase in relation to eAPase was detected; iAPase activity was 46.1 times higher than eAPase. The maximal activity of eAPase was after 24h of fungus growth and for iAPase was after 96h. Optimal pH and substrate...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzyme inhibitors; Molybdenum; Overexpression; Phosphate; Soil chemical characteristics.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500658
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Effects of micronutrients on growth and yield of pigeonpea Open Agri
Malla Reddy,M.
Palavras-chave: Pigeonpeas; Boron; Seed treatment; Inorganic acid salts; Molybdenum; Soil sciences; Genetic soil types; Chickpeas; Grain legumes; Rhizobium.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3336
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Girassol: nutricao mineral e adubacao. Infoteca-e
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
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Micronutrientes para a cultura da soja no Estado do Parana: zinco e molibdenio. Infoteca-e
LANTMANN, A. F.; CAMPO, R. J.; SFREDO, G. J.; BORKERT, C. M..
bitstream/item/35344/1/1985-Comunicado-Tecnico.n.34.Micronutrientes-18x26-OK.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Micronutriente do solo; Brasil; Parana; Micronutrient; Soybean.; Molibdênio; Soja; Zinco.; Brazil; Molybdenum; Soil; Zinc..
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/445462
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Molibdenio e cobalto na cultura da soja. Infoteca-e
SFREDO, G. J.; BORKERT, C. M.; LANTMANN, A. F.; MEYER, M. C.; MANDARINO, J. M. G.; OLIVEIRA, M. C. N. de.
bitstream/item/35355/1/1997-Circular-Tecnica.n.16-Mo-e-Co-1475x21-09.05.2011-OK.pdf
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Micronutriente; Brasil; Parana; Maraanhao.; Adubação; Cobalto; Cerrado; Molibdênio; Soja.; Cobalt; Fertilizer application; Brazil; Molybdenum; Savannas; Soybeans; Trace elements..
Ano: 1997 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/459840
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Nitrate reductase activity in leaves and stems of tanner grass (Brachiaria radicans Napper) Scientia Agricola
Cazetta,Jairo Osvaldo; Villela,Luciana Cristine Vasques.
Tanner grass (Brachiaria radicans Napper) is a forage plant that is adapted to well-drained soils or wetlands, and responds well to nitrogen (N) fertilization. The assimilation of N involves the nitrate reductase (NR) enzyme, and its activity seems to be dependent on N supply. Molybdenum (Mo) is also important because it is a cofactor of NR. In this study, the variables of an in vivo assay were optimized for measuring nitrate reductase activity (NRA) in the leaves and stem tissues. This method was used to evaluate NO3- metabolism in plants fertilized with NaNO3, NH4Cl or urea, in association with or without application of H2MoO4, aiming to provide guidelines for N management of this species. The best conditions to determine NRA involved the incubation of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brachiaria arrecta; Nitrogen; Molybdenum; Enzyme.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600012
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Peanut response to lime and molybdenum application in low pH soils Rev. Bras. Ciênc. Solo
Quaggio,J. A.; Gallo,P. B.; Owino-Gerroh,C.; Abreu,M. F.; Cantarella,H..
Liming acid soils is considered to assure the availability of Mo in crops. Additionally, in peanuts (Arachis hypogaea L.) the positive response to liming is associated to a better supply of Ca+2, Mo for the nitrogenase-complex activity, and other non-nitrogen fixing activities of the crop. This study was thus undertaken to assess the effect of lime, Mo, and the lime-Mo interaction on peanut crop, on an acid Ultisol at the Mococa Experimental Station, Instituto Agronômico, São Paulo State, Brazil, from 1987 to 1990. A randomized complete block design with four replications, in a 4 x 4 factorial arrangement, was used in the study. The factors included four lime rates (0, 2, 4, and 6 t ha-1) broadcast and incorporated into the soil, and Mo (0, 100, 200, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arachis hypogaea; Liming; Molybdenum; Nitrogen fixation.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832004000400008
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PHOSPHORUS-MOLYBDENUM RELATIONSHIP IN SOIL AND RED CLOVER (Trifolium pratense L.) ON AN ACID ANDISOL R.C. Suelo Nutr. Veg.
Ribera,Alejandra E; Mora,Maria de la Luz; Ghiselini,Vanessa; Demanet,Rolando; Gallardo,Felipe.
We studied the phosphorous (P) and molybdenum (Mo) relationship in soil and red clover (Trifoliumpratense L.) in a non limed and limed acid Andisol of Southern Chile. In soil, we evaluated the effect of different liming (0 and 2000 mg kg-1), P (0, 200 and 400 mg kg-1), and Mo (0, 0.58 and 0.96 mg kg-1) doses supply on soil available Mo. In addition, the availability of P and Calcium (Ca) in treated soils was determinated. In red clover, we studied the Mo and P shoot concentrations and dry matter yield in response to the different treatments applied to the soil. Also, we measured the changes produced by Mo uptake in shoot Cu concentrations. The results showed that both, lime and more strongly P and Mo additions significantly (P ≥ 0.05) increased...
Tipo: Journal article Palavras-chave: Phosphorous; Molybdenum; Andisol; Red clover.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100008
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Physiological and genotoxic effects of molybdenum-induced copper deficiency in cattle Agrociencia
Picco,Sebastián; Ponzzinibio,M. Virginia; Mattioli,Guillermo; Rosa,Diana; Minatel,Leonardo; Fazzio,Luis; Seoane,Analía.
Molybdenosis is a disease caused by the depressing effect of molybdenumn (Mo) on the physiological availability of Copper (Cu). The present study was carried out in order to analyze the ability of Mo to cause damage on the DNA integrity and changes in membrane fatty acids by oxidative damage. Holstein male calves were fed a Mo-supplemented diet for 9 months. Variables evaluated were plasma Cu concentration, erythrocyte Cu content and SOD activity, comet assay and analysis of the fatty acid composition of erythrocyte membranes. The statistical design was a completely randomized with one single factor and two replications. Copper plasma concentration, erythrocyte copper concentration and Cu/Zn SOD activity were analyzed using the t test. Chi-square test was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Molybdenum; Copper deficiency; Oxidative damage; DNA damage; Bos taurus; SOD activity.
Ano: 2012 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000200002
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Reexamination of analytical methods for Al and Mo in plant material. Infoteca-e
ISHIZUKA, J.; MESQUITA FILHO, M. V. de.
bitstream/item/192045/1/ID06911-CRI1613.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Aluminium; Plants; Brasil; Japão; BIBJICACPAC.; Alumínio; Análise; Cerrado; Molibdênio; Planta; Pesquisa; Cooperação Internacional; Analytical methods; Molybdenum.
Ano: 1981 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549938
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Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield ArchiMer
Van Langenhove, Leandro; Depaepe, Thomas; Vicca, Sara; Van Den Berge, Joke; Stahl, Clement; Courtois, Elodie; Weedon, James; Urbina, Ifigenia; Grau, Oriol; Asensio, Dolores; Peñuelas, Josep; Boeckx, Pascal; Richter, Andreas; Van Der Straeten, Dominique; Janssens, Ivan A..
Background and aims Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. Methods We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water...
Tipo: Text Palavras-chave: Free-living nitrogen fixation; Tropical forest; French Guiana; Nutrients; Phosphorus; Molybdenum.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00487/59901/63083.pdf
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Relationship between Paratuberculosis and the microelements Copper, Zinc, Iron, Selenium and Molybdenum in Beef Cattle BJM
Paolicchi,F.; Perea,J.; Cseh,S.; Morsella,C..
To study the deficiency of minerals and its relationship with Paratuberculosis, blood, serum, and fecal samples were obtained from 75 adult bovines without clinical symptoms of the disease and from two bovines with clinical symptoms of the disease, from two beef herds with a previous history of Paratuberculosis in the Province of Buenos Aires, Argentina. Serum samples were processed by ELISA and feces were cultured in Herrolds medium. Copper, zinc and iron in serum were quantified by spectrophotometry and selenium was measured by the activity of glutathione peroxidase. We also determined copper, zinc, iron and molybdenum concentrations in pastures and the concentration of sulfate in water. Mycobacterium avium subsp paratuberculosis (Map) was isolated from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paratuberculosis; Micronutrients; Selenium; Molybdenum; Copper.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100022
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Seeds enriched with phosphorus and molybdenum improve the contribution of biological nitrogen fixation to common bean as estimated by 15n isotope dilution Rev. Bras. Ciênc. Solo
Chagas,Eduardo; Araújo,Adelson Paulo; Alves,Bruno José Rodrigues; Teixeira,Marcelo Grandi.
Seeds with a high concentration of P or Mo can improve the growth and N accumulation of the common bean (Phaseolus vulgaris L.), but the effect of enriched seeds on biological N2 fixation has not been established yet. This study aimed to evaluate the effect of seeds enriched with P and Mo on growth and biological N2 fixation of the common bean by the 15N isotope dilution technique. An experiment was carried out in pots in a 2 x 3 x 2 x 2 factorial design in randomized blocks with four replications, comprising two levels of soil applied P (0 and 80 mg kg-1), three N sources (without N, inoculated with rhizobia, and mineral N), two seed P concentrations (low and high), and two seed Mo concentrations (low and high). Non-nodulating bean and sorghum were used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Molybdenum; Nodulation; Phaseolus vulgaris.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400009
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Silicate electrochemical measurements in seawater: Chemical and analytical aspects towards a reagentless sensor ArchiMer
Lacombe, Marielle; Garcon, Veronique; Thouron, Daniele; Le Bris, Nadine; Comtat, Maurice.
From the study of molybdenum oxidation in aqueous solutions we developed a semi-autonomous method to detect silicate in aqueous samples. Molybdenum oxidation was used to form molybdate in acidic media. The silicomolybdic complex formed with silicate is detectable by amperometry or cyclic voltammetry. The new electrochemical method is in good agreement with the method conventionally used for environmental water silicate analysis. In the second stage, a completely reagentless method was developed using molybdate and proton produced during molybdenum oxidation. Reproducibility tests show a precision of 2.6% for a concentration of 100 mu mol L-1. This new method will be Very Suitable for the development of new autonomous silicate sensors easy to handle and...
Tipo: Text Palavras-chave: Cyclic voltammetry; Amperometry; Reagentless; Silicate; Molybdenum.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6114.pdf
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