LD2668 .T4 1949 P49 / Master of Science

Digitized by Kansas Correctional Industries

Digitized by Kansas Correctional Industries

Orientador: Luiz Mauro Barbosa / Banca: Victor José Mendes Cardoso / Banca: Nelson Augusto dos Santos Junior / Abstract: The present work is a result of a partnership between the Secretaria Estadual do Meio Ambiente and the International Paper do Brasil. lts aim was to attend to projects regarding lhe preservation and recovery of riparian forests at Mogi-Guaçu region. The goal was to evaluate different alternatives (leaf iitter and rain seed) for the enrichment of the riparian forest implemented in 1996 at the company domam. Besides, there was an evaluation of lhe use of stored seeds and the control of germination in greenhouse, as comparative parameters. The study areas were: (a) Fazenda Ouro Verde (Conchal, SP), with reminiscent vegetation classified and a mesofila semidecidua riparian forest, with fluvial seasonal influence, where was conducted the gathering of leaf litter using mobile parcels of 1m2, and rain seed using 40 coilector with a nylon fence of 1 m2, arranged in 5 transects perpendicular to lhe Mogi-Guaçu river; (b) Parque Florestal São Marcelo (Mogi-Guaçu, SP), where was conducted the test of enrichment, mn sub-parcels of 2mx2m, distributed in 4 experimental sets of 25mx25m, in a revegetated riparian area with arboreal native species. There was no statistical difference for the mean number of species within the experimental treatments. The mean number of germinated individuais by the rain seed treatment was significantly higher than the leaf litter treatment. In general, the species that obtain lhe highest survival success along the experiment was Syagrus romanzoffiana Uerivá), Nectandra megapotamica (canela amarela), Eugenia brasillensis (grumixama) e Pseudobombax sp. (embiruçu), what corroborates lhe idea that the direct seeding of arboreal secondary species in revegetated areas can produce promissing results relating lhe germination and establishment of those species, specially understory conditions, contributing to the increase of local diversity. The general results showed that this... (Complete abstract, click electronic address below). / Mestre

Digitized by Kansas Correctional Industries

The effect of drying corn, rice and wheat seed in two stages was studied, using germinability as a measure of quality. For the first stage, fluidised bed dryer (FBD) and spouted bed dryer (SBD) were used to dry seed from 20-25%wb to 18%wb while in-store dryer (ISO) was used in the second stage for drying from 18%wb to below 14%wb. The drying air temperature range of 40-80??C was studied for the first stage while 18-30??C and relative humidity 60-70% were for the second stage. It was found that dryer type, drying temperature, initial moisture content of seeds and drying time had significant effects on the seed germination. From the result, the drying air temperature of 40??C was safe for corn and rice in FBD while 60??C was acceptable for wheat. In SBD, the 40??C was the maximum drying temperature for rice and wheat without quality deterioration. Meanwhile the second stage drying in an ISD under all specified conditions was safe. In this work, the thin-layer drying models were developed. The results showed that the modified Page's model and modified two-compartment model were the best-fitted models with the root mean square (RMS) of the differences between the predicted moisture ratio and the measured values below 0.03. Besides, the existing ISD simulation program provided the RMS of 0.3, 1.1, and 0.9%wb for corn, rice and wheat respectively. The germination models for FBD and SBD were also developed. As a result, the modified Giner's models 1&2 were the best-fitted models for FBD with the RMS of the differences between predicted and measured germination percentages of 7.9, 4.2 and 3.4% for corn, rice and wheat while the modified Giner's models 2&3 were for SBD with the RMS of 5.5 and 6.1% for rice and wheat respectively. The comparison between FBD and SBD revealed that FBD had faster drying rate while SBD consumed less energy. Ultimately, the energy cost analysis showed that single-stage drying in a fixed bed dryer using ambient condition consumed less energy than two-stage drying using a FBD and ISD but lower energy cost must be weighed against the faster drying rate, flexibility, portable design, and product uniformity of FBD.

Thesis (Ph. D.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.

Thesis (Ph. D.)--Oregon State University, 1984. / Typescript (photocopy). Includes bibliographical references (leaves 94-97). Also available on the World Wide Web.

Thesis (M.S.)--Oregon State University, 1984. / Typescript (photocopy). Includes bibliographical references (leaves 42-44). Also available on the World Wide Web.

Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains viii, 45 p. : col. ill. Vita. Includes abstract. Includes bibliographical references (p. 39-42).