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| Cruz,Lútecia Hiera da; Santana,Henrique de; Zaia,Cássia Thaïs Bussamra Vieira; Zaia,Dimas Augusto Morozin. |
| This work showed that the adsorption of glyphosate (GPS) depends on surface area for clays and amount of clays and CEC for soils. Organic matter (OM) had a secondary role in the adsorption of GPS on soils. The adsorption of GPS on soils from Londrina and Floraí counties and clays (montmorillonite, kaolinite) decreased when pH increased, however, for bentonite clay and soil from Tibagi county was kept constant. For the soils, the competitive adsorption between GPS and phosphate showed that displace of GPS by phosphate was related to the amount of clays, CEC and pH. GPS was not easily displaced by phosphate on the clays. The FT-IR spectra of the soils and clays showed that soil from Londrina resembled kaolinite. Thus, this could explain the results of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glyphosate; Adsorption; Clays; Soils. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300004 |
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| Souza,Rosinei Aparecida de; Hungria,Mariangela; Franchini,Julio Cezar; Maciel,Carlos Dias; Campo,Rubens José; Zaia,Dimas Augusto Morozin. |
| O objetivo deste trabalho foi avaliar e validar um conjunto mínimo de parâmetros para o monitoramento, em campo, da microbiota do solo e da fixação biológica do N2 (FBN) pela soja. Os ensaios foram conduzidos em áreas de plantios comerciais (safra 2002/2003) e experimentais (safra 2004/2005), em blocos ao acaso. O C e o N da biomassa microbiana (CBM e NBM) mostraram-se adequados para a avaliação quantitativa da microbiota do solo e ambos os parâmetros foram correlacionados significativamente, portanto, apenas um deles precisa ser determinado. Foram obtidas correlações positivas e significativas entre a massa da parte aérea seca das plantas (MPAS) e o CBM e o NBM. A análise do DNA total do solo por eletroforese em géis desnaturantes (DGGE) detectou... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Glycine max; Biomassa microbiana; Fixação biológica do nitrogênio; Monitoramento ambiental. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000100011 |
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| Zaia,Dimas Augusto Morozin; Marques,Fábio Rangel; Zaia,Cássia Thaïs Bussamra Vieira. |
| A comparative study between the biuret method (standard method for total proteins) and spectrophotometric methods using dyes (Bradford, 3',3",5',5"-tetrabromophenolphthalein ethyl ester-TBPEE, and erythrosin-B) was carried out for the determination of total proteins in blood plasma from rats. Bradford method showed the highest sensitivity for proteins and biuret method showed the lowest. For all the methods, the absorbance for different proteins (BSA, casein, and egg albumin) was measured and Bradford method showed the lowest variation of absorbance. The concentration of total protein obtained by using Bradford method was not statistically different (p>0.05) from concentration of total protein obtained by the biuret method. But in regard to erythrosin-B... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Total proteins; Spectrophotometry; Blood plasma; Dye-binding methods. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300008 |
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