3 documents found, page 1 of 1
Water repellency of sandy soil as a function of hydrophobic concentration
Cambronero, Yorleni Chang; Maia, Claudia Maria Branco de Freitas; Dedecek, Renato Antônio; Hansel, Fabrício AugustoSoil water repellency has been reported worldwide being most extremes cases observed in sandy soils. Soil water repellency is accepted to be caused by recovering of soil particles by hydrophobic compounds originated from plant decomposition. This work aimed to evaluate the influence of concentration of hydrophobic extracts from a forest soil under Pinus taeda on water repellency of sandy soil with differe...
In vitro Establishment of Ocotea odorifera, O. catharinensis and O. porosa
Moritz, Aline; Degenhardt, Juliana; Dutra, Leonardo Ferreira; Hansel, Fabrício Augusto; Lima, Bruno Henrique de; Franceschi, Cristina do Rosário BatistaSeveral species of the Lauraceae family are endangered, due to the high value of their woods,and the consequent exploitation of natural populations. Among them, Ocotea porosa, O. odorifera and O.catharinensis, native from South Brazil, have recalcitrant seeds, what makes even more dificult their naturalregeneration. This work aimed to evaluate in vitro seed germination and multiplication of O. odorifera and O.c...
Microwave as an alternative to sample preparation in the foliar tissue silicon ...
Pereira, Claudia Mara; Hansel, Fabrício Augusto; Radomski, Maria Izabel; Verdeckin, Maisa GottardoThe aim of this work was to test the viability of microwave digestion for the colorimetric determination of silicon in foliar tissues of wood species. In the test, the correlation coefficient was 0.998 in the concentration range of 0.4 to 7 mg.g-1. Spiked cellulose samples were used and the recovery was high than 90 % in two tested concentrations (2 e 4 mg.g-1). The obtained coefficients of variation were equal...