Membranes isolated from heterocysts and vegetative cells of Anabaena 7120 were assayed for content of cytochrome f, cytochrome b-563, cytochrome b-559(HP), cytochrome b-559(LP), and cytochrome aa(3) by use of reduced-minus-oxidized difference spectra. The level of cytochrome aa(3) in heterocyst membranes was 4 to 100 times higher than that in vegetative cells of Anabaena 7120 or other species o...

This report validates a technique of separating and labeling canine platelets using indium-1 1 llabeled 8-hydroxyquinoline (Yn-8-HQ). Platelet survival time in six normal dogs was 6.3 ? 0.7 (SD) days. Labeling effisiency using this technique was 51.8 + 9.2% (SEM) and elution loss of 11LIn-8-HQ label from platelets was consistently less than 4%. Vn label offers no observable advantages over the ...

New 8-quinolinolate (Q) complexes of yttrium (1) and ytterbium (2) were synthesized by the reactions of Cp3Y and Yb[N(SiMe3)2]3 with 3 equiv. of 8-hydroxyquinoline in a DME solution. Single crystal X-ray analysis revealed the trinuclear molecular structure of the compounds Ln3Q9. The LDI-TOFMS investigation displayed that under the laser impact the compounds split off Q(-) anions to give Ln3Q8(...

Laser resonant two-photon ionization UV spectra provide clear evidence that the effect of increasing the length of the hydrogen-bonded chain consisting of molecules such as NH(3), H(2)O, or CH(3)OH on the pi --> pi* excitations of cis-7-hydroxyquinoline (cis-7HQ) is strongly cooperative [ Thut ; et al. J. Phys. Chem. A 2008 , 112 , 5566. ] A theoretical analysis of the experimental data is prov...

Pellets of paraffin wax implanted into the lumen of the bladder of 38 mice induced one carcinoma. An equally low incidence of carcinomas was induced with paraffin wax pellets containing 15-20 per cent suspensions of 8-hydroxyquinoline or quinaldic acid, 8-hydroxyquinaldic acid, xanthurenic acid, the 8-methyl ether of xanthurenic acid, 4,8-quinolinediol, L-kynurenine sulfate, 3-hydroxy-L-kynuren...

Organic light-emitting diodes made of tris-8-(hydroxyquinoline) aluminum as the electron-transport layers, N, N -diphenyl-N, N bis (3-methylphenyl)-1, 1 -biphenyl-4,4 -diamine (TPD) as the hole-transport layers, and 2-(1, 1-dimethylethyl)-6(2-(2, 3, 6, 7-tetrahydro-1, 1, 7, 7-tetramethyl-1H, 5H-benzo(ij) quinolizin-9-yl) ethenyl)-4H-pyran-4-ylidene) propanedinitrile (DCJTB) as the guest dopant ...

The excited-state triple proton relay of 7-hydroxyquinoline (7HQ) along a hydrogen-bonded methanol chain in room temperature ionic liquids (RTILs) has been investigated using picosecond time-resolved fluorescence spectroscopy. The rate constant of the proton relay in a methanol-added RTIL is found to be slower by an order of magnitude than that in bulk methanol and to have unity in its kinetic ...

The electron transporting molecule tris(8-hydroxyquinoline) aluminum (Alq(3)) was added in low concentrations to a photorefractive polymer composite to provide trapping sites for electrons. This sample exhibited larger two-beam coupling gain, higher diffraction efficiency at lower voltages, and an increased dielectric breakdown strength compared to a control sample. The dynamics also revealed t...

The racemic product of the Betti reaction of 5-chloro-8-hydroxyquinoline, benzaldehyde and 2-aminopyridine was separated by chiral HPLC to determine which enantiomer inhibited botulinum neurotoxin serotype A. When the enantiomers unexpectedly proved to have comparable activity, the absolute structures of (+)-(R)-1 and (-)-(S)-1 were determined by comparison of calculated and observed circular d...