Variable Polarity
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. ESTUDO EXPLORATÃRIO DA SOLDAGEM MIG/MAG COM DUPLO ARAME EMPREGANDO CORRENTE ALTERNADA / Exploratory Study of tandem GMA welding applying alternating current
Este trabalho teve como objetivo o estudo exploratÃrio do processo MIG/MAG-DA-PI utilizando corrente alternada. Os ensaios foram executados em simples deposiÃÃo na posiÃÃo plana em chapas de aÃo baixo carbono com espessura de 3 mm utilizando arame eletrodo de 1,2 mm de diÃmetro. Foram realizados estudos sobre o nÃvel de corrente, tipo de onda aplicad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2007
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2. Desenvolvimento de fases estacionarias C-8 sorvidos e imobilizadas para CLAE a partir de silica zirconizada
The purpose of this work is the development of stationary phases for Reversed Phase High Performance Liquid Chromatography (RP-HPLC) applications, using zirconized silica as support and the C-8 polymer poly(methyloctylsiloxane)-PMOS as liquid phase . The zirconized silica was synthetized by reaction of 10 mm porous silica with zirconium butoxide. The support
Publicado em: 1998
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3. Oroshigane, a New Segment Polarity Gene of Drosophila Melanogaster, Functions in Hedgehog Signal Transduction
Here we describe a new segment polarity gene of Drosophila melanogaster, oroshigane (oro). Identified as a dominant enhancer of Bar (B), oro is also recessive embryonic lethal, and homozygous oro embryos show variable substitution of naked cuticle with denticles. These patterns are distinctly similar to those of hedgehog (hh) and wingless (wg) embryos, which
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4. Structure of a single-chain antibody variable domain (Fv) fragment complexed with a carbohydrate antigen at 1.7-A resolution.
We describe here the 1.7-A resolution structure of a single-chain antibody variable domain (scFv) molecule, based on the carbohydrate-binding antibody Se155-4, complexed with the trisaccharide ligand alpha-D-Gal(1-->2)[alpha-D-Abe(1-->3)]alpha-D-Manp1-->OMe, where Abe is abequose. The scFv expressed in Escherichia coli has the variable region light chain to
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5. The tight junction protein ZO-1 is homologous to the Drosophila discs-large tumor suppressor protein of septate junctions.
Tight junctions form an intercellular barrier between epithelial cells, serve to separate tissue compartments, and maintain cellular polarity. Paracellular sealing properties vary among cell types and are regulated by undefined mechanisms. Sequence of the full-length cDNA for human ZO-1, the first identified tight junction component, predicts a protein of 17
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6. Rearrangement by inversion of a T-cell receptor delta variable region gene located 3' of the delta constant region gene.
We have located a T-cell receptor variable (V) delta gene segment immediately 3' of the delta constant (C) region gene and 5' to the known joining (J) alpha gene segments. This V delta gene is in the opposite transcriptional polarity to C delta and has rearranged to C delta by inversion in a gamma/delta-expressing hybridoma, DN7.3. This V delta gene is commo
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7. Apiconuclear Organization of Microtubules Does Not Specify Protein Delivery from the Trans-Golgi Network to Different Membrane Domains in Polarized Epithelial Cells
In nonpolarized epithelial cells, microtubules originate from a broad perinuclear region coincident with the distribution of the Golgi complex and extend outward to the cell periphery (perinuclear [PN] organization). During development of epithelial cell polarity, microtubules reorganize to form long cortical filaments parallel to the lateral membrane, a mes
The American Society for Cell Biology.
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8. An approximate model and empirical energy function for solute interactions with a water-phosphatidylcholine interface.
An empirical model of a liquid crystalline (L alpha phase) phosphatidylcholine (PC) bilayer interface is presented along with a function which calculates the position-dependent energy of associated solutes. The model approximates the interface as a gradual two-step transition, the first step being from an aqueous phase to a phase of reduced polarity, but whi
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9. Hepatocyte Growth Factor Switches Orientation of Polarity and Mode of Movement during Morphogenesis of Multicellular Epithelial Structures
Epithelial cells form monolayers of polarized cells with apical and basolateral surfaces. Madin-Darby canine kidney epithelial cells transiently lose their apico-basolateral polarity and become motile by treatment with hepatocyte growth factor (HGF), which causes the monolayer to remodel into tubules. HGF induces cells to produce basolateral extensions. Cell
The American Society for Cell Biology.
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10. Hydrogen bond-directed aggregation of diazadibenzoperylene dyes in low-polarity solvents and the solid state
The formation of complex superstructures via hydrogen bonding of two ditopic building blocks, diazadibenzoperylenes 1a,b and isophthalic acid 2, has been investigated. It was found that only the phenoxy-substituted diazadibenzoperylene 1a forms extended assemblies with 2 in complexes of a 1:1 stoichiometry, whereas for the 4-tert-butylphenoxy-substituted ana
National Academy of Sciences.
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11. Asymmetry and polarity of nucleosomes in chicken erythrocyte chromatin.
Nucleosome dimers containing, on average, a single molecule of histone H5 have been isolated from chicken erythrocyte nuclei and the associated DNA fragments cloned and sequenced. The average sequence organization of at least one of the two nucleosomes in the dimers is highly asymmetric and suggests that the torsional, as well as the axial, flexibility of DN
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12. Genome structure of cottontail rabbit herpesvirus.
The genome structure of a herpesvirus isolated from primary cultures of kidney cells from the cottontail rabbit Sylvilagus floridanus was elucidated by using electron microscopy and restriction enzyme analysis. The genome, which was about 150 kilobase pairs long and which had an average G + C composition of 45%, consisted of two regions with unique base sequ