Heat transfer in the electrical neutral channel of an arc gas heater

Results are given from experiments on heat transfer in the motion of a high-enthalpy gas through a tube; the results are presented in the form of a general relationship St=f(Re, H /H₀,l/d).Translated from Inzhenerno-Fizicheskii Zhurnal. Vol. 19, No. 5, pp. 846–849, November, 1970.     

Investigation of the coolant edge wetting angle for mesh heat pipe wicks

Results are presented of an experimental investigation of the edge wetting angle of Freon-22, ethane, and ammonia for mesh wicks in the 20–115, 6–115, and 20–60°C temperature ranges, respectively.Deceased.Fiftieth Anniversary of the Great October Socialist Revolution Kiev Polytechnic Institute.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 36, No. 4, pp. 620–626, April, 1979.     

The secondary structure of amides of adenylic acid containing D- and L-aromatic amino acids

Adenylyl-(5'leads to N)-amino acids containing as amino components, methyl esters of D-, L- and DL-phenylalanine, D-, L- and DL-tyrosine, and D-, L- and DL-tryptophan have been investigated by proton magnetic resonance (PMR) spectroscopy and circular dichroism (CD). The temperature and pD dependences of proton chemical shifts of these compounds have been studied. These data, together with the magnitudes of the upfield chemical shifts of the PMR signals of adenine and aromatic amino acids residues in adenylyl-(5'leads to N)-amino acids, have enabled us to construct conformational models of these compounds. The proposed conformation has been substantiated by the CD results. It is shown that in adenylyl-(5'leads to N)-amino acids the planes of adenine and amino acid aromatic moieties are roughly parallel. The aromatic rings of phenylalanine and tyrosine are localized approximately above the centre of adenine. In adenylyl-(5'leads to N)-D, -(L)-tryptophan, the six-membered rings of the indole overlaps the five-membraned ring of adenine indole partially overlaps the six-membered ring of adenine. A difference in the non-covalent interactions of D- and L-amino acids with nucleotides has been revealed. The mutual localization of the aromatic systems of AMP and the amino acids and also the positions of -OCH3 group with respect to the centre of the amino acid aromatic moiety differs in the series of the studied nucleotide derivatives of D- and L-amino acids.