Sorptional properties of carbon nanotubes produced from corn wastes

The sorption capacity of multiwalled nanotubes synthesized in the mechanical activation of amorphous carbon from corn wastes is investigated. The sorptional effectiveness of the nanotubes depends on their storage time. The use of carbon from corn waste as chelators is considered.     

Plant sources of carbon nanotubes

Carbon nanotubes may be produced by the mechanical activation of amorphous carbon derived from the wastes of Katerina SV corn. After 27-h mechanical activation, the yield of nanotubes is 42 wt %.     

The development of enabling technologies for producing active interrogation beams

A U.S./Russian collaboration of accelerator scientists was directed to the development of high averaged-current (～1?mA) and high-quality (emittance ～15?πmm?mrad; energy spread ～0.1%) 1.75 MeV proton beams to produce active interrogation beams that could be applied to counterterrorism. Several accelerator technologies were investigated. These included an electrostatic tandem accelerator of novel design, a compact cyclotron, and a storage ring with energy compensation and electron cooling. Production targets capable of withstanding the beam power levels were designed, fabricated, and tested. The cyclotron/storage-ring system was theoretically studied and computationally designed, and the electrostatic vacuum tandem accelerator at BINP was demonstrated for its potential in active interrogation of explosives and special nuclear materials.     

Mid- and Long-Wave IR Detectors Using an Hg1 – xCdxTe Heteroepitaxial Layer

A complete production technology is developed for single-cell and array IR detectors using an MBE-grown Hg_{1 – x} Cd _x Te heteroepitaxial layer. The array detectors implement a bump-bonded flip-chip hybrid architecture. The arrays are constructed in photodiodes and have a size of 128 × 128 or 4 × 288. The single-cell detectors are built around a photoconductivity cell. The detectors are operated in the wavelength range 3–5 or 8–12 m and at 78–80 or 200–220 K. Some performance data on the detectors are presented.     

Search for the most stable folds of protein chains: II. Computation of stable architectures of {beta}-proteins using a self-consistent molecular field theory

In a preceding paper we presented a novel approach to computationof 3-D folds of protein chains from their amino acid sequences.This approach is a physically correct generalization of the‘threading’ methods. It is based on a self-consistentmolecular field theory and on a physical theory of protein foldingpatterns, which make it possible to examine all the varietyof ‘potentially stable’ folding patterns and allthe variety of the chain conformations within each of them andto determine the thermodynamically stable structure. In thispaper, we apply this approach to single out stable folding patternsand conformations for the chains of ß-sandwich proteinsand show that the similarity of the calculated and observedstructures is usually rather close.