Bromides
Mostrando 13-24 de 25 artigos, teses e dissertações.
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13. Estudo de alguns compostos organolantanídeos como catalisadores na reação de polimerização de etileno / Study of some organolanthanide compounds as catalysis of ethylene polymerization reaction
In attempt to contribute to the application of organolanthanides as catalysts for olefin polymerization, we report the synthesis, characterization and catalytic activity in ethylene polymerization ofthe organolanthanide compounds containing or not the ligands triphenylphosphine (PPh3) and pyrazole (HPz). The synthesis of the organolanthanide compounds was pe
Publicado em: 2001
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14. Estudo do efeito da serie homologa de surfatantes anionicos e cationicos e de compostos purinicos na atividade da proteina tirosina fosfatase de baixa massa molecular relativa do rim bovino
Protein tyrosine phosphatase (PTP) plays a key event in the regulation of cell division, differentiation, and development. Among the members of this superfamily, the low Mr protein tyrosine phosphatases (LMr PTPs) have been found in mammals, yeast and various bacteria. This work describes the effect of the homologous series of n-alkyl sulfates (C8-C14, anion
Publicado em: 1998
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15. Efeitos de ions na hidrolise acida dos tris-complexos de ferro (II) Com 2,2 - bipiridina e 1,10-fenantrolina
Neste trabalho apresentamos o estudo da dissociação ácida dos complexos tris-(2,2 -bipiridina)ferro(II) e tris-(l,10-fenantrolina)ferro(II) (na forma de percloratos) em soluções de cloretos e brometos de metais alcalinos, alcalino-terrosos e de amônio. Observa-se uma tendência inicial, da constante de velocidade de pseudoprimeira ordem, em aumentar, c
Publicado em: 1978
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16. Compostos de coordenação de trimorfolino fosfonoxido com alguns metais de transição
Adducts between Trimorpholinophosphine oxide (MORPO) and hydratated bromides, perchlorates and hexafluorophosphates of some divalents transition metals were obtained the compounds of the bromides presented the general formulas MBr2.2MORPO in which M = Mn, Co, Cu and Zn and NiBr2.2(MORPO).2H2O. The compounds of the perchlorates presented the general formula M
Publicado em: 1977
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17. THE ADMINISTRATION OF BROMIDES AND IODIDES
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18. PHASE RELATIONS IN SYSTEMS COMPRISING BROMINE AND QUATERNARY AND TERNARY ALKYL AMMONIUM BROMIDES OR CHLORIDES
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19. Interaction between model membranes and a new class of surfactants with antioxidant function.
The effect of two series of amphiphilic quaternary ammonium salts on some properties of phospholipid membranes was studied. The compounds of one series, N-benzyl-N,N-dimethyl-N-alkyl ammonium bromides, exert a destructive effect on membranes and are treated as reference compounds. The compounds of the other series, N-(3,5-di-t-butyl-4-hydroxy)benzyl-N,N-dime
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20. Flow microcalorimetry investigation of the influence of surfactants on a heterogeneous aerobic culture.
The influence of various surfactants on the biological activity of a mixed aerobic culture has been investigated by using flow microcalorimetry. The response of the culture to the addition of homologous n-alkylcarboxylates (C2 to C16) and n-alkylpyridinium bromides (C11 to C14) has been examined under endogenous and substrate saturation conditions, and inhib
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21. Bacterial metabolism of quaternary ammonium compounds.
Of 10 quaternary ammonium compounds tested for biodegradation by the biological oxygen demand technique, only decyl- and hexadecyltrimethylammonium bromides were decomposed by organisms derived from sewage and soil. A mixture consisting of individual strains of Pseudomonas and Xanthomonas grew in solutions containing decyltrimethylammonium bromide as sole ca
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22. 13C and 199Hg nuclear magnetic resonance spectroscopic study of alkenemercurinium ions: Effect of methyl substituents on 199Hg chemical shifts
The long-lived ethylene, cyclohexene, and norbornenemercurinium ions prepared in superacidic, low-nucleophilic media have been studied by 13C and 199Hg NMR spectroscopy. The norbornenemercurinium ion shows temperature-dependent 13C and 199Hg NMR spectra, consistent with equilibration via rapid hydride and Wagner-Meerwin shifts. The 199Hg NMR shifts of a seri
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23. Probing a Membrane Matrix Regulating Hormone Action: I. The Molecular Length of Effective Lipids 1
Auxin-induced pea (Pisum sativum) stem section elongation is enhanced at levels of 3 to 40 micromolar by six new classes of alkane derivatives additional to those described earlier, providing that length of their molecules exceeds 20 A. Increasingly longer homologous series of alkyl chlorides, bromides and iodides, alkyl benzenes, dialkyl ethers, and sulfide
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24. Mortality of workers potentially exposed to organic and inorganic brominated chemicals, DBCP, TRIS, PBB, and DDT.
A historical prospective mortality study was conducted on 3579 white male workers employed between 1935 and 1976 with potential exposures to brominated compounds including 1,2-dibromo-3-chloropropane (DBCP), Tris (2,3-dibromopropyl) phosphate, polybrominated biphenyls (PBB), various organic and inorganic bromides, and DDT. The vital status as of 31 December