Effect of pulse time gate on CsI(T1) light output

The mass and charge identification of secondary particles with Z < 4 by a large CsI(T1) scintillation detector is performed using pulse shape analysis and time-of-flight methods. The dependence of the light output on E, A and Z is studied in the energy range of 1–20 MeV/A and special attention is paid to the integration time of the photomultiplier anode signal. It is found that the behaviour of the calibration curves strongly depends on the choice of the integration time interval.     

Semicoking of the residual humin from Berezovsk lignite

The semicoking of residual humin from Berezovsk lignite is investigated, with and without additions of modifier. The maximum semicoke yield is observed at 450°C after 0.25 h. Converted for absolutely dry semicoke, it is 64–66%, regardless of the moisture content of the humin. The 11% increase in tar yield when using heavy tar from Arlansk petroleum as the modifier confirms these conclusions. The operational characteristics show that modified semicoke practically matches the properties of traditional reducing agents. Analysis indicates that the tar from the semicoking of residual humin is characterized by relatively high calorific value and contains mainly fractions with moderate boiling points. Accordingly, it may be regarded as a fuel.     

An experimental study of desublimation of carbon dioxide from a gas mixture

An experimental study of the desublimation of carbon dioxide from a gas mixture with nitrogen on a cooled surface was performed. A test bench for the study of desublimation process comprised a gas mixture source, a measurement cell, a cooling system, a vacuum system, and a control and measuring system. The main factors that influence the degree of recovery of carbon dioxide were determined. Empirical dependences of the degree of recovery of carbon dioxide on the process parameters were obtained. The possibility of the commercial implementation of the process is discussed.     

Humic acids from Belorussian lignite of Brinev and Zhitkovichi deposits

A method is developed for practically complete extraction of humic acids from Brinev and Zhitkovichi lignite (Belarus); alkaline extraction is employed. Parameters for the separation of humic acids (the extractant, the extraction temperature and duration) are selected so as to maximize the yield. The extracted humic acids are modified by oxidation and chlorination. The content of functional groups is determined in the humic acids and their modification products. Their IR spectra are analyzed.     

The Effect of Plastification of Cu–14Al–4Ni Alloy with the Shape Memory Effect in High-Temperature Isothermal Precipitation

Technical Physics Letters - It was found that deformation by the uniaxial compression scheme (while measuring mechanical properties under isothermal conditions) at 600–800°C leads to a...     

Transformation of the TiNi Alloy Microstructure and the Mechanical Properties Caused by Repeated B2-B19′ Martensitic Transformations

The influences of thermal cycling treatment in the temperature range of B2-B19 martensitic transformations (-150 to 150 °C) on the TiNi alloy structure and properties were studied. Different states named the initial coarse-grained (CG) state, the ultrafine-grained (UFG) state after ECAP (with a grain size of 200 nm), the state after ECAP and cold upsetting by 30% were considered. The results show that the microhardness and the strength increase in all the three states. According to the XRD analysis, a more significant increment in the dislocation density, resulting from thermal cycling, is observed in the UFG alloy than in the CG alloy.     

Variation in the phase composition and hardness of TiNi alloys exposed to magnetic fields

Influence of magnetic fields on the phase composition and hardness of nickel titanium (TiNi) alloys has been investigated. It is shown that changes in the phase composition of TiNi samples exposed to magnetic fields for a long period of time depend on the magnetic field type (uniform or nonuniform). Significant variations in hardness of the samples under investigation have been observed.     

Obtaining monochromatic beams of accelerated 6He ions with a near-Coulomb-barrier energy on the DRIB accelerator complex at the JINR

Two methods for obtaining monochromatic beams of accelerated ⁶He ions with energies around the Coulomb barrier on the DRIB accelerator complex at the Joint Institute for Nuclear Research (JINR) is described. In the first method, the MSP-144 magnetic spectrometer is used as a monochromator of low-energy ⁶He beam after its passing through an energy absorber. The energy resolution of the ⁶He beam, which is 500 keV, is governed by the linear dimension of the target in the focal plane (18 mm). In the other method, a special probe is used to investigate nuclear reactions with accelerated ⁶He beams without loss of the beam intensity. With this probe, it is possible to perform experiments on the internal beam of the postaccelerator (U-400 cyclotron) of the DRIB complex. As a result, a ⁶He beam with a required energy and a beam resolution of 150 keV or better is produced at the target.     

Quasielastic scattering of 8B and 7Be on 12C at 40 MeV/nucleon

Enteropathogenic Escherichia coli (EPEC) O111:H2, O119:H6, or O142:H6 caused rapid detachment of Chinese hamster ovary (CHO) cell monolayers within 2 to 4 h of cocultivation. CHO cell detachment was not promoted by nonenteropathogenic E. coli (O125:H4, O126:H27, O157:H7, and O26:H11) and could not be attributed to EPEC production of enterohemolysin or Shiga-like toxins. In contrast, EPEC strains did not promote rapid detachment of Lec1, Lec2, or Lec8 CHO cell monolayers. These CHO cell Lec mutants all express abbreviated glycan sequences on membrane glycoproteins and glycolipids. Although EPEC strains failed to alter the adherent properties of Lec2 cells lacking only terminal sialic acid groups, EPEC adherence to the Lec2 mutant was indistinguishable from that observed with wild-type CHO cells. There was also no significant difference in EPEC-induced actin accumulation or invasion of Lec2 cells. In contrast, EPEC localized adherence to Lec1 and Lec8 mutants, lacking sialyllactosamine (Lec1) or sialic acid and galactose (Lec8) sequences, was reduced by 84 and 93%, respectively. Our results suggest that lactosamine sequences [beta Gal(1-4 or 1-3)beta GlcNAc] not containing sialic acid are sufficient for EPEC adherence, actin accumulation, and invasion of CHO cells. Sialic acid groups, however, may be necessary for EPEC-mediated CHO cell detachment.