The hydrolysis of sodium borohydride as a source of hydrogen gas is studied at different mole ratios of H+ to NaBH4. The sulfonated porous carbon (SPC) is used as a source of hydrogen ion and catalyst. It is found that the sulfonated porous carbon exhibits high activity for the hydrolysis of NaBH4 to generate hydrogen gas at room temperature in comparison to Amberlyst-15 and Nafion-NR50. The ki...

Chemical studies have been carried out on the interaction of DNA with uranyl salts. The effect of variations in pH, salt concentration, and structural integrity of the DNA on the stoichiometry of the salt-substrate complex have been investigated. At pH 3.5 DNA interacts with uranyl ions in low concentration yielding a substrate metal ion complex with a UO(2) (++)/P mole ratio of about (1/2) and...

We present and discuss in detail the design and characterization of a new linear quadrupole ion trap with additional ion ejection and acceleration electrodes that is coupled to a time-of-flight mass spectrometer. Mass spectra of Coulomb crystals consisting of Ca+,CaO+ and CaOH+ ions were recorded with a post-ejectionacceleration scheme yielding a mass resolution ofm/ m ≈ 700. The second order r...

We consider an ion whose motion is con®ned to a plane perpendicular to a constant magnetic ®eld. A harmonic trapping ®eld is applied within the plane of the ion’s motion, together with some unspeci®ed irradiating probe beam. By determining the dynamics of the ion we show that the particle theory is formally equivalent to that of a coupled massive ...1‡ 2†-dimensional vector Boson ®eld. The ®eld...

We introduce a pragmatic approach towards the corrected Base Excess (BE) by including the large variability of the apparent dissociation constant pK' in non-logarithmic form in Henderson-Hasselbach bicarbonate ion equilibria thereby resulting in a significant correction both in calculated bicarbonate ion concentration and BE at 37 degrees C.

An efficient method for the synthesis of diamino-o-benzoquinone based on the Michael reaction of electrochemically generated o-benzoquinone with azide ion is described, as well as an estimation of the homogeneous rate constant (k(obs)) of the reaction of o-benzoquinone with azide ion by the digital-simulation method.

Theory is developed to address a significant problem of how two charged dielectric particles interact in the presence of a polarizable medium that is a dilute solution of a strong electrolyte. The electrostatic force is defined by characteristic parameters for the interacting particles (charge, radius, and dielectric constant) and for the medium (permittivity and Debye length), and is expressed...

Entanglement spectrum and quantum phase transitions (QPTs) in S = 1 bond-alternative antiferromagnetic Heisenberg chain with single-ion anisotropy and magnetic field are investigated by the infinite time-evolving block decimation (iTEBD) method. The combined effects of the single-ion anisotropy and magnetic field have been discussed, and a rich ground-state phase diagram is obtained. We find th...

Early leak current, i.e. for times similar to the time to peak of the transient current was measured in Myxicola giant axons in the presence of tetrodotoxin. The leak current-voltage relation rectifies, showing more current for strong depolarizing pulses than expected from symmetry around the holding potential. A satisfactory practical approximation for most leak corrections is constant resting...

This paper addresses the issue of color constancy, which is the the perceptual abi l i ty of the human visual system to assign the same colors to objects under different l ight ing conditions. We propose a method, based on finite-dimensional linear models of reflectance and i l luminat ion, which allows the transformation [R,G,B] images into color constant images. In contrast to previous work, ...