Formação das substâncias de reserva durante o desenvolvimento de sementes de urucum (Bixa orellana L. - Bixaceae)

Annatto seeds do not germinate during early stages of their development because of insufficient reserve substances. In situ analysis showed that the principal reserves are proteins and starch, deposited in endosperm cells. During the early stages of development, the starch grains were elliptic, because amylose was the minor component. During development, these grains became more spherical due to an increase in amylose relative to amylopectin. Endosperm cells do not contain protein bodies, but they accumulate proteins dispersed in the cytoplasm. At the final stage of development the proteins became compacted due to the dehydration of the seeds wich is part of the global process of orthodox seeds maturation. Natural fluorescence revealed aromatic amino acids, principally tryptophan and tyrosine in the proteins. The seeds reached their maximum dry weight after moisture contents had declined to around 60%. At this point the seeds presented maximum germination capacity.

Efeito da temperatura e do teor de umidade na iniciação e desenvolvimento do rizoma de Kohleria eriantha (Benth.) Hanst. (Gesneriaceae)

Kohleria eriantha (Benth.) Hanst is a plant belonging to the family Gesneriaceae, with an underground organ, which is associated with vegetative reproduction. This organ is a rhizome, whose stem bears buds covered with modified leaves that store up starch. In small sections of this rhizome, containing six buds (1.5 to 2.0cm long), only one bud sprouted. The sprouted bud could be differentiated into two morphological pattern: aerial part or rhizome. Sprouting of the rhizome pattern occurred in sections kept on substrate with low water content (1mL of water), or lacking water, whereas sprouting of the aerial part pattern occurred in sections on substrate with high water content (12mL of water). Temperature at 20ºC also stimulated sprouting of the rhizome pattern, regardless of the water volume in the substrate. Sprouting of the rhizome pattern occurred still in sections on substrate to which polyethylene glycol 6000 (PEG) solution was added at the concentrations of 161.2, 235.2 and 340.0g/L, resulting in potentials of -3, -6 and -12 MPa, respectively. Sections kept on substrate with low water content (1 ml of water) showed a reduction in the dry matter content and high osmotic concentration in comparison with those on substrate with high water content. The results obtained revealed that forming of the rhizome pattern was influenced by water content and temperature. It is suggested that sprouting of the rhizome pattern was induced by the low water potential in the sections, when kept on substrate with low water content. Moreover, it was observed that the rhizome buds of Kohleria eriantha showed a high degree of plasticity.

Estudo inicial da degradação in vivo de poli(L-co-D,L ácido lático), sintetizado em laboratório, aplicado como prótese tibial em coelhos

The copolymer poly (L-co-D,L lactic acid), PLDLA, has gained prominence in the field of temporary prostheses due to the fact that their time of degradation is quite compatible with the requirement in the case of osseous fracture. In this work the in vivo degradation of devices from copolymer, as a system of plates and screws, used in fixation of the tibia of rabbits was studied. The devices were implanted in 15 adult rabbits, albinos, New Zealand race, and they were used as control devices of alloys of titanium (Ti-6Al-4V/ V grade). The use of copolymers, synthesized in the laboratory, was tested in the repair of fracture in rabbits'tibias, being assessed in the following times: 2 weeks, 2 months and 3 months. Morphological analysis of tissue surrounding the plate and screw system, for 2 weeks of implantation, showed the presence of osteoblasts, indicating a pre bone formation. After 2 months there was new bone formation in the region in contact with the polymer. This bone growth occurred simultaneously with the process of PLDLA degradation, invading the region where there was polymer and after 3 months there was an intense degradation of the copolymer and hence greater tissue invasion compared to 2 months which characterized bone formation in a region where the polymer degraded. The in vivo degradation study of the devices for PLDLA by means of histological evaluations during the period of consolidation of the fracture showed the efficiency of plate and screw system, and it was possible to check formation of bone tissue at the implantation site, without the presence of inflammatory reaction

Efeito cariostático de restaurações adesivas em superfícies radiculares: estudo in vitro

Dental materials that release fluoride have been shown to be effective in caries inhibition around restorations. Adhesive materials would also be effective in caries inhibition by sealing and protecting cavity margins from acidic demineralization. This in vitro study tested the hypothesis that composite restorations with a dentin adhesive system have a caries preventive effect similar to that of an adhesive material with fluoride - glass-ionomer cement - on root surfaces. Twenty roots from extracted sound third molars were embedded in polystyrene resin and ground flat. Standardized cavities were prepared in leveled root surfaces and randomly restored with (a) Chelon-Fil (Espe) or (b) Z100/SingleBond (3M). Baseline indentations were measured at 100, 200 and 300 mum from the occlusal margins of each restoration and the surface microhardness values were obtained using a Knoop diamond indenter. A 2.0 mm wide margin around the restorations was submitted to a pH-cycling model, at 37ºC. After that, surface microhardness was measured again, as it was before. The differences between baseline and final surface microhardness were considered for statistical analysis. The median values of differences were (a): -3.8; -0.3; -1.0; and (b): 3.3; 2.5; 1.7, for the distances of 100, 200 and 300 mum, respectively. The Kruskal-Wallis test did not show statistically significant difference between 100, 200 and 300 mum distances in each tested group. There was no difference between the studied materials at the distances of 200 and 300 mum. Chelon-Fil was statistically different from Z100/SingleBond, at 100 mum (p<0.05). Under the studied conditions, the glass-ionomer cement had a higher caries preventive effect than the composite/dentin adhesive restorations.

Desenvolvimento de equações generalizadas para estimativa da coordenação motora em crianças e adolescentes portadores de deficiencia mental

Universidade Estadual de Campinas . Faculdade de Educação Física

O rugbi em cadeira de rodas : aspectos tecnicos e taticos e diretrizes para seu desenvolvimento

Universidade Estadual de Campinas . Faculdade de Educação Física

Desenvolvimento humano, lazer e educação fisica escolar : o papel do componente ludico da cultura

Universidade Estadual de Campinas. Faculdade de Educação Física

Brincando no ambiente natural : uma contribuição para o desenvolvimento sensorio-motor da criança portadora de paralisia cerebral

Universidade Estadual de Campinas . Faculdade de Educação Física

Desenvolvimento de um laboratorio basico de biomecanica

Universidade Estadual de Campinas. Faculdade de Educação Física

O papel da propriocepção no desenvolvimento da força muscular e da flexibilidade

Universidade Estadual de Campinas . Faculdade de Educação Física

Brincar : uma opção para a interação entre mãe ouvinte/filho surdo

Universidade Estadual de Campinas . Faculdade de Educação Física

Consciencia corporal na escola

Universidade Estadual de Campinas . Faculdade de Educação Física

Lazer como pratica educativa : as possibilidades para o desenvolvimento humano

Universidade Estadual de Campinas. Faculdade de Educação Física

Basquetebol chileno : perspectivas e desenvolvimento

Universidade Estadual de Campinas. Faculdade de Educação Física

A ação do professor de ensino superior na educação fisica adaptada : construção mediada pelos aspectos dos contextos historicos, politicos e sociais

Universidade Estadual de Campinas. Faculdade de Educação Física