Potencial morfogenético e carotenóides em tecidos cultivados in vitro de Pothomorphe umbellata L

Pós-graduação em Agronomia (Horticultura) - FCA

Efeitos da Calcarea phosphorica 6CH e do alendronato na reparação da lesão óssea em ratas ovariectomizadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da qualidade óssea no reparo de defeitos ósseos sob a ação do risedronato e da deficiência estrogênica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pitaya: propagação e crescimento de plantas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Indução de calos em espécies amazônicas do gênero Theobroma

Vários trabalhos vem sendo desenvolvidos sobre o cultivo in vitro de cacau (T.cacao), mas são raros para a maioria das outras espécies do gênero, como o cupuaçu (T. grandiflorum), cuja a área plantada vem aumentando expressivamente, e outras que poderiam servir de fonte de genes para as espécies economicamente já reconhecidas. Protocolos para obtenção de embriões somáticos in vitro para as espécies T. cacao,T. grandiflorum,T. speciosum e o híbrido T. grandiflorum x T. obovatum foram avaliados a partir de duas fontes de explantes, estaminódios e pétalas (formadas por lígulas e cógulas) cultivados em meio de crescimento primário de calo, consistindo de sais DKW, suplementado com 20 g l^-1 de sacarose, 250 mg l^-1de glutamina, 200 mg l^-1 de mio-inositol, 0,2 mg l^-1 de tiamina-HCl, 0,1 mg l^-1 de ácido nicotínico, 0,2 mg l^-1 de glicina, 2 mg l^-1 de 2,4-D, 2,2 g l^-1 de Gelrite® e pH 5,8. A este meio foram adicionadas diferentes concentrações de tidiazuron (0, 5 e 10 µg l^-1). As culturas foram mantidas no escuro por 14 dias, à temperatura de 25 ± 2 ºC, e então transferidas para meio de crescimento secundário de calo, constituído de sais WPM, vitaminas de Gamborg, 20 g l^-1 de sacarose, 2 mg l^-1 de 2,4 D, 0,3 mg l^-1 de cinetina, 50 ml l^-1 de água de côco, 2,2 g l^-1 de Gelrite® e pH 5,8. A formação de calos ocorreu em todas as espécies. Embriões somáticos foram obtidos somente para T. cacao. A calogênese mostrou-se influenciada pelo genótipo e foi maior nos estaminódios.

Investigation on combustion derived BaMgAl10O17:Eu2+ phosphor powder and its corresponding PVP/BaMgAl10O17:Eu2+ nanocomposite

This work focuses on the study of BaMgAl10O17:Eu2+ (BAM:Eu) nanophosphors prepared by a microwave-assisted combustion procedure and more especially on the polymer/BAM:Eu nanocomposite film suitable for optical devices such as solid-state-lighting. Powder presented a specific nanomorphology, highly friable and thus easily ground into fine particles. They were then homogeneously dispersed into a polymer solution (poly(N-vinylpyrrolidone) or PVP) to elaborate a polymer phosphor nanocomposite. The structural, morphological and optical features of the nanocomposite film have been studied and compared to those of a pristine PVP film and BAM:Eu powder. All the characterizations (XRD, SEM, SAXS, etc.) proved that the blue phosphor nanoparticles are well incorporated into the polymer nanocomposite film which exhibited the characteristic blue emission of Eu2+ under UV light excitation. Furthermore, the photostability of the polymer/phosphor nanocomposite film has been studied after exposure to accelerated artificial photoageing at wavelengths above 300 nm.

What do floral anatomy and micromorphology tell us about Neotropical Bulbophyllum section Didactyle (Orchidaceae: Bulbophyllinae)?

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Cell cultures of Maytenus ilicifolia Mart. are richer sources of quinone-methide triterpenoids than plant roots in natura

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Propagação de variedades de caramboleira por estaquia herbácea

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Clonagem de canistel por estaquia

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Investigations on PVP/Y3BO6:Eu3+, a red Luminescent composite for lighting devices based on near UV-LEDs

This work deals with a red phosphor. Y3BO6:Eu3+, and its corresponding poly(N-vinylpyrrolidone) (PVP)/Y3BO6:Eu3+ luminescent composite film suitable for applications in the next generation of Hg-free lamps based on near ultraviolet (UV) light emitting diodes (LEDs). Well crystallized samples of Y3BO6 powders with the Eu3+ content up to 20 mol% were prepared by the Pechini method. After structural, morphological and optical characterization, the best doping rate of Eu3+ in the matrix was determined to be 15 mol%. This optimal powder, which is highly friable, was easily ground into fine particles and homogeneously dispersed into a PVP polymer solution to give rise to a polymer phosphor composite. Structural and optical features of the composite film have been studied and compared to those of a pristine PVP film and Y3BO6:Eu3+ powder. All the characterization (XRD, SAXS, luminescence...) proved that the red phosphor particles are well incorporated into the polymer composite film which exhibited the characteristic red emission of Eu3+ under UV light excitation. Furthermore, photostability of the polymer/phosphor composite film under UV-LED irradiation was evaluated from exposure to accelerated artificial photoageing at wavelengths above 300 nm.

Geologia do platô N6 - província mineral de Carajás (SP)

The N6 Plateau presents an iron-ore occurence in Carajás Mineral Province, standing near to actually operating deposits. Geological mapping in 1:10,000 scale and integration of geochemical, geophysical, petrography and drilling turns possible interpretation of his geological evolution. The mapped area has lithotypes from Archean Grão Pará Group, comprising very lowgrade metamorphic basic rocks and iron formation and an Proterozoic sedimentary association of conglomeratic sandstones called as Caninana Unity. The structural geology in given by a regional scale homoclinal, where the Grão Pará Group strata dips towards SW, as a part of the Northern Limb of the Carajás Fold. Subsequent deformation associated to the installation of the Carajás Shear Zone presents as E-W fold axis. Geochemical evidence permits to consider de Parauapebas Formation as the rocks which has been hydrothermally-altered to outsourcing fluids responsible to deposition of iron formations in the oceanic system, including different signatures which can be interpreted as possible sub-embayments in the Carajás Basin. The iron ore in the area occurs in subsurface as very fine friable hematite generated by supergenous enrichment of the iron formation. The conceived geologic model differs from the current academic proposal on the fact that hydrothermal alteration has been involved on the jaspelite enrichment. Metamorphism on the Parauapebas Formation presents paragenesis considered as ocean-floor metamorphism which precedes de deformation insofar as the rocks show no tectonic fabric referring to shallow crust evolution. Geophysical methods such as magnetometry and gravimetry presents excellent results for structural interpretation in uneven exposed terrain

Tibial osteosynthesis in a guinea pig (Cavia porcellus)

A guinea pig was presented with left pelvic limb lameness after unknown trauma. Radiographs revealed complete oblique diaphyseal fracture of the distal third of the left tibia and fibula. The guinea pig was treated surgically with an intramedullary pin. The day after surgery the guinea pig was using the limb comfortably (grade 1/5 lameness). Callus formation was obtained 21 days after surgery without complications.

Plasma rico em plaquetas, medula óssea ou quitosana nas osteossínteses minimamente invasivas na tíbia de cães

Pós-graduação em Cirurgia Veterinária - FCAV

Avaliação da tenacidade à fratura de diferentes sistemas cerâmicos

Although ceramics present high compressive strength, they are brittle materials due to their low tensile strength so they have lower capacity to absorb shocks. This study evaluated the fracture toughness of different ceramic systems, which refers to the ability of a friable material to absorb defformation energy. Three ceramic systems were investigated. Ten cylindrical samples (5,0mm x 3,0mm), were obtained from each ceramic material as follows: G1- 10 samples of Vitadur Alpha (Vita-Zahnfabrik); G2- 10 samples of IPS Empress2 (Ivoclar-Vivadent); G3- 10 samples of In-Ceram Alumina (Vita-Zahnfabrik). Fracture toughness values were collected upon indentation tests that were performed under a heavy load. A microhardness tester (Digital Microhardness Tester FM) utilized a 500gf load cell during 10seconds to perform four impressions on each sample. Statistically significant results were observed (ANOVA and Kruskal-Wallis tests). In-Ceram Alumina presented the highest median toughness values (2,96N/m3/2), followed by Vitadur Alpha (2,08N/m3/2) and IPS Empress2 (1,05N/m3/2). It may be concluded that different ceramic systems present distinct fracture toughness values, thus In-Ceram is capable of absorbing superior stress when compared to Vitadur Alpha and IPS Empress2.