The rates of H-D exchange for imino and amino protons in adenosine, calf thymus DNA, poly (dA-dT), poly(dG-dC), and poly (dG-me5dC) were determined using stopped flow kinetic methods in the presence of various concentrations of Tris, imidazole, Mg2+, and spermine in citrate buffer (pH 7, 25 degrees C). CD spectroscopic studies showed that all polynucleotides always remain in the B-form under th...

NNH2, can also readily form on Co3Mo3N surfaces via the Eley–Rideal chemisorption of H2 on a pre-adsorbed N2 at nitrogen vacancies. Based on this intermediate a new heterogeneous mechanism for hydrazine synthesis is studied. The highest relative barrier for this heterogeneous catalysed process is 213 kJ/mol for Co3Mo3N containing nitrogen vacancies, clearly pointing towards a low-energy process...

Hydrazine (N(2)H(4)) is a clear, inorganic colourless liquid. It is known to be a skin sensitizer, a corrosive agent and it causes dermatitis on contact. Hydrazine is employed in chemical plants, used as a corrosion inhibitor for feed waters and may be added to rocket fuels. The authors report the case of a 68-year-old man with multiple basal cell carcinomas (BCCs) covering his arms and face. T...

DFT calculations show that a combination of an electric field and electronic excitation is promising mechanism to force molecular switch based on amino-imino tautomerisation into one its two states. By calculating the effect in direction moving hydrogen shape barrier ground low-lying excited states previously proposed switches consisting 5- 7-membered rings with adjacent amino imino groups, we ...

The current work aimed to fabricate a screen-printed graphite electrode (SPGE) modified by MnO2 nanorods (MnO2 NRs) for sensing hydrazine. Thus, facile protocol was adopted construct the that were subsequently applied modify SPGE surface directly. As-synthesized NRs/SPGE sensor exhibited strong behavior towards hydrazine, with large peak and small oxidation potential. This electrochemical in op...

P. He*, K. P. Bader, and G. H. Schmid Universität Bielefeld, Fakultät für Biologie, Lehrstuhl Zellphysiologie, D-4800 Bielefeld 1, Bundesrepublik Deutschland Z. Naturforsch. 46c, 629-634 (1991); received March 21, 1991 Filamentous Cyanobacterium, Photosystem II, Water Splitting, S-States, Hydrogen-Peroxide Analogue In tobacco chloroplasts hydrazine-dependent dinitrogen formation measured by mas...

We report on real-time electrochemical detection of individual DNA hybridization events at an electrode surface. The experiment is carried out in a microelectrochemical device configured with a working electrode modified with single-stranded DNA probe molecules. When a complementary DNA strand labelled with a catalyst hybridizes to the probe, an easily detectable electrocatalytic current is obs...

The influence of hydrazine reduction on metal dispersion, particle size distribution, and support morphology was investigated for a series of bimetallic Ru-AuiMgO catalysts. The catalysts were prepared by impregnation of MgO with chlorine-containing precursor salt solutions. Hydrazine reduction significantly lowered the residual chlorine content of the catalysts and allowed the formation of hig...

in this paper a chemical deposition procedure for the preparation of lead sulfide thin film ispresented. the details of the preparation method are described. the influence of hydrazine hydrate onthe microstructure and deposition rate of lead sulfide thin film has been investigated. the concentrationof the lead ions in the deposition bath decreases more slowly when the hydrazine hydrate is added...