Polyanion
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Synthesis, Characterization and Catalytic Performance of a Novel Picolinic Acid-12-Molybdophosphoric Acid Hybrid Catalyst
A novel 12-molybdophosphoric acid (HPM)-based complex (H2PI)2(H3O)[PMo12O40][Mo2O5(H2O)2(PI)2]·11H2O (PI-HPM) was prepared by modification with picolinic acid (HPI) and characterized by the methods of Fourier transform infrared (FTIR) spectroscopy, thermogravimetry (TG), X-ray powder and single crystal diffraction. The complex retained the classical Keggin
J. Braz. Chem. Soc.. Publicado em: 2016-06
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2. Síntese e caracterização de misturas poliméricas condutoras para aplicação em membranas biodegradáveis e dispositivos eletroluminescentes / Synthesis and characterization of conducting polymeric blends for use in biodegradable membranes and electroluminescent devices
The electrical properties of some conducting polymers and their blends have contributed to the technological advancement in various areas such as medicine and microelectronics. Recently, photochemical synthesis and spinner techniques have been using to prepare polymeric blends with good conducting properties. In this study we report the preparation of conduc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2012
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3. Phase equilibrium and structural characterizarion of systems composed by polyanions and cationic surfactants / Equilibrio de fases e caracterização estrutural de sistemas contendo polianions e surfatantes cationicos
Polieletrólitos associam-se fortemente com surfatantes de carga oposta em meio aquoso, levando a uma separação de fases que resulta em uma fase concentrada, rica em polieletrólito e surfatante, em equilíbrio com uma fase diluída constituída pelos contra-íons. A fase concentrada pode ser constituída de interessantes estruturas supramoleculares advind
Publicado em: 2008
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4. Study of photoinduced birefrigence, in layer-by-layer films containing azopolymer and azodye / Estudo de birrefrigência fotoinduzida em filmes automontados de azopolímeros e azocorantes
This work was aimed at investigating the influence of the molecular architecture and film fabrication on the photoinduced birefi-ingence of layer-by-layer (LbL) films containing the azopolymer PS 119® or the azodye Brylliant Yellow (BY) as photoreactive materials. The LbL films were produced with six polications, viz.: poly(allylamine hydrochloride) (PAH),
Publicado em: 2005
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5. Differential detection of multiple DNA-binding complexes using dissimilar polyanion competitors.
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6. Selective Interactions of Polyanions with Basic Surfaces on Human Immunodeficiency Virus Type 1 gp120
It is well established that the gp120 V3 loop of T-cell-line-adapted human immunodeficiency virus type 1 (HIV-1) binds both cell-associated and soluble polyanions. Virus infectivity is increased by interactions between HIV-1 and heparan sulfate proteoglycans on some cell types, and soluble polyanions such as heparin and dextran sulfate neutralize HIV-1 in vi
American Society for Microbiology.
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7. Interferon induction by the immunomodulating polyanion lambda carrageenan.
The lambda fraction of carrageenan induced murine interferon, which was characterized by sensitivity to trypsin and inhibition by pretreatment of target cells with actinomycin D.
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8. Reversibility of Heparin Inhibition of the Antibacterial Activity of Polymorphonuclear Leukocyte Lysosomal Proteins
Inhibition of antibacterial activity of polymorphonuclear leukocytic lysosomal cationic proteins by a polyanion, heparin, can be reversed by addition of the basic nuclear protein, clupeine.
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9. Interaction of Heparins and Dextran Sulfates with a Mesoscopic Protein Nanopore
A mechanism of how polyanions influence the channel formed by Staphylococcus aureus α-hemolysin is described. We demonstrate that the probability of several types of polyanions to block the ion channel depends on the presence of divalent cations and the polyanion molecular weight and concentration. For heparins, a 10-fold increase in molecular weight decrea
The Biophysical Society.
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10. Sodium polyanethol sulfonate inactivation of aminoglycosides.
Sodium polyanethol sulfonate and another polyanion (dextran sulfate) both inhibited aminoglycoside activity in vitro. This effect was not produced by an otherwise similar neutral carbohydrate (dextran) or by neutral detergents (Brij-35, Triton X-100) but was antagonized by an anion-exchange resin (Dowex 1X8-50). We conclude that the inactivation of aminoglyc
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11. Design and synthesis of ribonucleic guanidine: a polycationic analog of RNA.
Replacement of the phosphodiester linkages of the polyanion RNA with guanidinium linkers (represented by g) provides the polycation ribonucleic guanidine (RNG). An anticipated structure for the triple-helical hybrid [r(Up)9U.r(Ag)9A.r(Up)9U] is presented. A basic strategy for the synthesis of RNG oligomers is described. Synthetic procedures are provided for
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12. Mouse Resistance Against Foot-and-Mouth Disease Virus Induced by Injections of Pyran
Mouse resistance to foot-and-mouth disease virus (FMDV) was induced by intraperitoneal injections of pyran copolymer. A biphasic pattern of protection occurred with greatest resistance 4 and 48 hr after injection of this polyanion. Viremia was not detectable in pretreated mice challenge-exposed with FMDV. Incubation of virus with pyran did not alter viral in