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Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. INTEGRAÇÃO E INTEROPERABILIDADE DE DOCUMENTOS MPEG-4 E NCL / INTEGRATION AND INTEROPERABILITY OF MPEG-4 AND NCL DOCUMENTS
The MPEG-4 standard object-oriented approach, employed to the encoding of audiovisual content, is similar to those used on many models and languages for multimedia/hypermedia document specification. Among those languages, the NCL (Nested Context Language), used in the HyperProp system, introduces a series of new concepts that can be integrated to the standar
Publicado em: 2005
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2. Regulation of Hepatocyte Nuclear Factor 1 Activity by Wild-Type and Mutant Hepatitis B Virus X Proteins
The hepatitis B virus (HBV) core promoter regulates the transcription of two related RNA products named precore RNA and core RNA. Previous studies indicate that a double-nucleotide mutation that occurs frequently during chronic HBV infection converts a nuclear receptor binding site in the core promoter to the binding site of the transcription factor hepatocy
American Society for Microbiology.
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3. Molecular Cloning and Functional Characterization of Three Distinct N-Methyltransferases Involved in the Caffeine Biosynthetic Pathway in Coffee Plants1
Caffeine is synthesized from xanthosine through N-methylation and ribose removal steps. In the present study, three types of cDNAs encoding N-methyltransferases were isolated from immature fruits of coffee (Coffea arabica) plants, and designated as CaXMT1, CaMXMT2, and CaDXMT1, respectively. The bacterially expressed encoded proteins were characterized for t
American Society of Plant Biologists.
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4. Induction of Defense Responses in Cultured Parsley Cells by Plant Cell Wall Fragments 1
Cell suspension cultures of parsley (Petroselinum crispum) accumulated coumarin phytoalexins and exhibited increased β-1,3-glucanase activity when treated with either a purified α-1,4-d-endopolygalacturonic acid lyase from Erwinia carotovora or oligogalacturonides solubilized from parsley cell walls by endopolygalacturonic acid lyase. Coumarin accumulation
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5. Cell Wall Metabolism in Ripening Fruit (IX. Synthesis of Pectic and Hemicellulosic Cell Wall Polymers in the Outer Pericarp of Mature Green Tomatoes (cv XMT-22).
Discs of outer pericarp were excised from mature green tomato (Lycopersicon esculentum Mill.) fruit and kept in sterile tissue culture plates for 4 d, including 2 d of incubation with D-[U-13C]glucose. Cell walls were prepared and the water-soluble, pectic, and hemicellulosic polymers were extracted. Cell wall synthetic capacity was determined by gas chromat