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| Monte,Marisa B.M.; Middea,Antonieta; Paiva,Paulo R.P.; Bernardi,Alberto C.C.; Rezende,Nélio G.A.M.; Baptista-Filho,Milton; Silva,Marcelo G.; Vargas,Helion; Amorim,Helio S.; Souza-Barros,Fernando de. |
| This report describes the characterization of a sedimentary occurrence from the Parnaíba Basin, Brazil, containing the zeolite stilbite intertwined with smectitic clay mineral. The head samples from different sites present a wide content range of the zeolitic phase - 15% to 50%. The use of simple separation techniques - conventional gravitic treatments - yields concentrates containing about 67% of the zeolitic component. Assays with the amendments of these concentrates with plant nutrients yield release rates matching those reported for similar commercial products. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sedimentary zeolite; Parnaíba Basin; Plant nutrients; Nutrient attachment and release. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400003 |
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| Corrêa,Savio Figueira; Souza,Maximiliano Silva de; Pereira,Talita; Alves,Gustavo Verçosa de Lima; Oliveira,Jurandi Gonçalves de; Silva,Marcelo Gomes da; Vargas,Helion. |
| In order to determine the penetration of the thermal wave in the papaya fruit pulp (Carica papaya L.), cv. Golden, thermal diffusivity of the pulp was obtained measuring temperature at four different depths. Measurements were carried out initially with the fruit on the first stage of maturity. The changes of the thermal diffusivity were expressed as a function of ripening. A temporal decrease of the thermal diffusivity was observed. Chemical (pH, soluble solids and total titratable acidity) and physical (pulp firmness) properties were measured as well and the results were compared to the thermal diffusivity change. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carica papaya L.; Thermal wavelength; Quality parameters. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000300008 |
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