Численное исследование теплообмена в газоподогревающей установке

Relevance of the work due to the need to research the effectiveness and reliability of the heat exchangers. Research of heat transfer with different velocity of gas and temperature of steam was conducted. Results of the numerical modeling of the processes of heat exchange was presented

Secondary atomization of a biodiesel micro-emulsion fuel droplet colliding with a heated wall

Using high-speed video recording, we establish the following regimes of hydrodynami

The influence of 5-fluorouracil on activity of thymidine phosphorylase in gastric adenocarcinoma and normal adjacent tissue

The aim of the present study was to evaluate the change of thymidine phosphorylase (TP) activity in gastric adenocarcinoma and adjacent tissue upon the intraarterial administration of 5-fluorouracil (5-FU). Matherials and methods: The specimens of tumor and adjacent tissue were obtained by surgical operation on 36 patients (20 men and 16 women aged from 38 to 82 years) with gastric adenocarcinoma (stages II–IV). 5-FU was administered in the bolus dose to the gastroepiploic artery 2–60 min before the tumor resection. The concentration of 5-FU and activity of TP in both tissues were determined by high performance liquid chromatography method. Results: The concentration of 5-FU was decreased in a time-dependent manner in both tissues, though the interpatient variability of this value was much less in tumor tissue. The activity of TP was decreased with the course of the time after 5-FU administration in tumor and normal adjacent tissue. There were statistically significant differences in the TP activity in both tissues between 2–20 min and 40–60 min after 5-FU injection (p < 0.05). Conclusion: 5-FU administration results in the decrease of TP activity in tumor and normal adjacent tissues that might have importance for chemotherapy with fluoropyrimidines. Key Words: 5-fluorouracil, thymidine phosphorylase, gastric adenocarcinoma, normal mucosa

PEN: a low energy test of lepton universality

Allowed charged $\pi$ meson decays are characterized by simple dynamics, few available decay channels, mainly into leptons, and extremely well controlled radiative and loop corrections. In that sense, pion decays represent a veritable triumph of the standard model (SM) of elementary particles and interactions. This relative theoretical simplicity makes charged pion decays a sensitive means for testing the underlying symmetries and the universality of weak fermion couplings, as well as for studying pion structure and chiral dynamics. Even after considerable recent improvements, experimental precision is lagging far behind that of the theoretical description for pion decays. We review the current state of experimental study of the pion electronic decay $\pi^+ \to e^+\nu_e(\gamma)$, or $\pi_{e2(\gamma)}$, where the $(\gamma)$ indicates inclusion and explicit treatment of radiative decay events. We briefly review the limits on non-SM processes arising from the present level of experimental precision in $\pi_{e2(\gamma)}$ decays. Focusing on the PEN experiment at the Paul Scherrer Institute (PSI), Switzerland, we examine the prospects for further improvement in the near term.Comment: 11 pages, 5 figures; paper presented at the XIII International Conference on Heavy Quarks and Leptons, 22-27 May 2016, Blacksburg, Virginia, US