Ternary complexes of plasmid DNA, histone H1 protein and amphipathic polyamines (PAPA) were able to mediate the efficient transfection of 3T3. HeLa and COS cells in culture. Using both the beta-galactosidase and luciferase reporter gene systems, the transfection efficiency of PAPA complexes was comparable to that of DOSPA/PE cationic liposomes, considered to be a highly-efficient transfection r...

Combining a sterically bulky, electron-deficient 2-(2,4-difluorophenyl)-4-(2,4,6-trimethylphenyl)pyridine (dFMesppy) cyclometalating C4N ligand with an electron rich, highly rigidified 1,10-(a,a0-o-xylylene)-2,20biimidazole (o-xylbiim) N4N ligand gives an iridium complex, [Ir(dFMesppy)2(o-xylbiim)](PF6), that achieves extraordinarily bright blue emission (FPL = 90%; lmax = 459 nm in MeCN) for a...

In this study, a micelle mediated extraction procedure for preconcentration of trace quantities of Hg(II) as a prior step to its simultaneous spectrophotometric determination has been developed. The method is based on a ternary ion-association of Hg(II), Xylidyl Blue (XB) and cationic surfactant (CTAB). Major factors affecting the efficiency of the method has been studied. The limit of detectio...

We present a method of reversible photoswitching in carbon nanodots with red emission. A mechanism of electron transfer is proposed. The cationic dark state, formed by the exposure of red light, is revived back to the bright state with the very short exposure of blue light. Additionally, the natural on-off state of carbon dot fluorescence was tuned using an electron acceptor molecule. Our obser...

A cationic photo-curable cycloaliphatic epoxy resin has been investigated as reactive monomer in blue light crosslinking process. We have demonstrated that camphorquinone is able to abstract labile hydrogen from the epoxy monomer, giving rise to the formation of carbon-centered radicals that are oxidized by the onium salt; a complete epoxy group conversion was reached after 50 s of irradiation....

Recently, we reported that Campylobacter jejuni, an important gastrointestinal pathogen, has the genetic determinants to produce a capsular polysaccharide (Karlyshev et al., Mol. Microbiol. 35:529-541, 2000). Despite these data, the presence of a capsule in these bacteria has remained controversial. In this study we stain C. jejuni cells with the cationic dye Alcian blue and demonstrate for the...

G. S. Collins and Y. Le Manach Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK, and Departments of Anesthesia and Clinical Epidemiology and Biostatistics, Michael DeGroote School of Medicine, Faculty of Health Sciences, Population Health Research Institute, McMaster University and the Perioperati...

Ubiquicidin (UBI) [29-41] is a synthetic cationic antimicrobial peptide that preferentially binds to bacterial cell membrane at the site of infection. We aimed to assess diagnostic value of 99mTc-UBI [29-41] as a radiopharmaceutical in differentiation of bacterial infection from sterile inflammation in suspected orthopedic implants. Nine patients suspected for orthopedic implant infection, all ...

Photocatalysis in aqueous micellar media has recently opened wide avenues to activate strong carbon–halide bonds. So far, however, it mainly explored strongly reducing conditions, restricting the available chemical space radical or anionic reactivity. Here, we demonstrate a controllable, photocatalytic strategy that channels reaction of chlorinated benzamides via either cationic pathway, enabli...