Ultraviolet photoelectron spectroscopy of nano In clusters Schottky barriers on sputtered InP

Plasmon peaks along with Auger P_LVV peak have been observed in the ultraviolet photoelectron spectra (UPSs) of InP after 5 min of sputtering with 0.5 kV Ar⁺ ions. Plasmon and Auger peaks are not observed in UPS of un-sputtered InP surface with native oxides of In and P. Filled electron energy levels are not observed near the Fermi level from 5 min sputtered InP surface due to increase of ionization potential of nano In clusters.     

Transformation formulas associated with integrals involving the Riemann Ξ-function

Using residue calculus and the theory of Mellin transforms, we evaluate integrals of a certain type involving the Riemann Ξ-function, which give transformation formulas of the form F(z, α) = F(z, β), where αβ = 1. This gives a unified approach for generating certain modular transformation formulas, including a famous formula of Ramanujan and Guinand.     

Evaluation of apparent non-specific protein loss due to adsorption on sample tube surfaces and/or altered immunogenicity

The non-specific loss of protein analytes can have a major effect on assay results particularly where the concentrations of such analytes are extremely low and the matrix is complex. This report assesses how the protein incubated in sample tubes may be lost due to adsorption. Use of proteins, such as bovine serum albumin (BSA), may be used to pre-treat tubes to reduce such losses. However, such losses may also be associated with structural perturbations leading to changes in immunogenicity (as a result of alterations in specific epitope-related conformations). This can lead to erroneous results or lack of comparability with a range of methodologies such as the bicinchoninic protein assay and immunoassays or when surface plasmon resonance (SPR)-based approaches are used. A model system to evaluate these phenomena is proposed.     

Crystallographic and morphological characteristics of explosively compacted copper under various detonation velocities

Micro-sized copper powder has been compacted using explosives of various detonation velocities. Corresponding crystallographic and morphological characteristics along with particle size variation have also been compared. Cylindrical configuration has been used for the shock consolidation of metal powder. It has been observed that using an explosive mixture of detonation velocity 4.2?km/s, the crystallite and micro-structure of the compacts remains the same with intact dendritic structure accompanied by a small variation in particle sizes. A good order of micro-hardness (88?±?4) H_v and density of ～94% of the theoretical value has been observed with lesser melting compared to the compacts obtained using explosive mixture with a high detonation velocity.     

Parity checking and generating circuit with semiconductor optical amplifier in all-optical domain

In this paper, an all-optical parity checker and parity generator circuit is proposed in which SOA-MZI configuration is used to implement the XOR logic gate. This performance monitoring logic device is simulated at ultra high speed i.e. 120 GHz. Two logic circuits are proposed for parity generator, in one design inverter used to generate parity bit is implemented by the same additional XOR gate as inverter while in 2nd design inverter is implemented using XGM in SOA and thus number of SOA in 2nd design is reduced. ER ratio achieved in 1st case is 9.28 with maximum Q factor 73.39 and minimum BER 0 while in 2nd design it is 9.35 with maximum Q factor 8.41 and minimum BER 1.93e−17. ER ratio achieved in parity checker circuit is 32.54 with maximum Q factor 77.76 and minimum BER 0.     

Photon-catalyzed bound—continuum processes: Post-saturation fluorescence quenching and huge enhancement of fragments in I2

With accurate experimental values of energies, transition moments and decay rates as input, our calculated results show that photon-catalyzed bound-continuum processes can be observed for the first time using I₂ in a cell or a molecular-beam experiment at laser intensifies as low as 10⁷ W/cm² and 10⁵ W/cm², respectively. Two new features, post-saturation quenching of fluorescence and huge (>150-fold) enhancement of fragments, are shown.     

First report of Zn2+ sensing exclusively at mesoscopic interfaces

We present a simple but unique, new probe 1-pyrenyl-methyl-bis(2-picolyl) amine (Pybpa) that selectively senses interfacially bound Zn2+ ions while being completely silent towards Zn2+ in bulk water.     

Patterned assembly of Yarrowia lipolytica yeast cells onto thermally evaporated octadecylamine films

Thermally evaporated patterned films of the lipid, octadecylamine (ODA), have been used in the immobilization of the hydrocarbon-degrading cells, Yarrowia lipolytica. The immobilization of the yeast cells occurs on hydrophobic surfaces presented by the lipid film elements in the patterned structure, the attachment of the cells to the lipid film occurring possibly through hydrophobic interactions between the hydrocarbon chains of the fatty amine film and the cell wall of the yeasts. It is observed that the cell immobilization is extremely faithful to the underlying lipid template indicating potential use in tissue engineering as well as materials applications involving specific enzyme-based biotransformations.     

Convenient syntheses of adenosine 5′-diphosphate,adenosine 5′-methylenediphosphonate,and adenosine 5′-triphosphate

Adenosine 5′-tosylate is converted to adenosine 5′-diphosphate (ADP), adenosine 5′-methylenediphosphonate, and adenosine 5′-triphosphate (ATP) in good yields by direct displacement with the appropriate inorganic salt.