Background: Nanoscale poly (amidoamine) dendrimers have been investigated for their biological demands, but their antibacterial activity has not been widely discovered. Thus, the sixth generation of poly (amidoamine) dendrimer (PAMAM-G6) was synthesized and its antibacterial activities were evaluated on Gram-negative bacteria; P. aeruginosa, E. coli, A. baumannii, S. typhimur...

nanoporous sodium montmorillonite clay (na+-mmt) was used as a support for the immobilization of 1-methyl-3-(trimethoxysilylpropyl)-imidazolium hydrogen sulfate (na+-mmt-[pmim]hso4). this catalyst showed excellent catalytic activity for the preparation of 2-amino-3-cyano-5-oxo-5,6,7,8-tetrahydro-4h-benzopyrans via three-component reactions between aldehydes, dimedone and malononitrile. the proc...

Optically active cationic complexes adsorbed on montmorillonite can be used for the resolution ofracemic mixtures. Montmorillonite-Cu-lysine systems were used as a solid phase in high-pressure liquid chromatography for the resolution of the optical isomers of a-amino acids. Selectivity constants > 1.5 were measured for phenylalanine and tryptophan. The selectivity constants for the amino acids ...

Com o crescimento diário do número de consumidores em nível mundial, a indústria alimentícia se caracteriza como um ramo ascensão contínua. Como consequência, sociedade procura obter informações nutricionais dos produtos consumidos por meio rótulos. O iogurte, objeto presente estudo, é tido pela consumo alimento rico nutrientes, que promove benefícios ao organismo e, isso, apresenta-se vantajos...

O objetivo deste trabalho foi avaliar o desempenho fisiológico e bioquímico de sementes trigo produzidas em diferentes estados do Brasil. Este estudo conduzido delineamento blocos casualizados com 11 tratamentos dispostos três repetições. A análise variância revelou significância para Germinação (G), Velocidade germinação (GS), Envelhecimento acelerado (AA), Comprimento da raiz (RL), emergência...

Novel structures of an near-infrared (NIR) tetraarylazadipyrromethene (aza-BODIPY) series have been prepared. We designed the core structure containing two amido groups at the para-position of the aromatic rings. The amido group was incorporated to secure insensitivity to pH and to ensure a bathochromic shift to the NIR region. Forty members of aza-BODIPY compounds were synthesized by substitut...

Reaction of LiAlH4 with 1,2-phenylenediamine (1H4) in THF results in formation of the metallocyclic amido-/imido complex [{Al(1H2)}2{Al(1H)2}2][Li(THF)2]4 (3), while in the presence of various Lewis base ligands 1,8-diaminonaphthalene (2H4) gives the amido-('ate') complexes [Al(2H2)2](-)[Li(LL')](+) [L = THF, L' = PMDETA (N,N,N',N',N''-pentamethyldiethylenetriamine) (4); L = L' = TMEDA (N,N,N',...

A nitrogen-based analogue of the Schrock and Clark “yl-ene-yne” complex, W(CBu)(CHBu)(CH2Bu )(dmpe), has been prepared. The new complex is the nitrido, imido, amido anion [NCr(NPh)(NPr2)2] , which was structurally characterized with the [K(crypt-2.2.2)] counterion. The “Cr–N 1-2-3” complex was prepared from NCr(NHPh)(NPr2)2, which exists as this nitrido–amido tautomer, rather than the bis(imido...