Relativistically covariant chronological ordering of interaction lagrangians

A general form of chronological ordering is proposed, based on introduction of relativistically invariant multipoint step functions (x₁, ..., x_n). A system of recursive relations is established for these functions, which guarantees that the scattering matrix is unitary, covariant, and causal. The explicit form of the first four -functions is found. A comparative analysis of the known methods of chronological ordering is given.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 70–73, May, 1990.     

Laboratory and Industrial Applications of Microwave Techniques

The use of microwave techniques in scientific research is reviewed. Also some semicommercial-scale microwave units are examined.     

Homolytic addition of 1,3-oxathiolane to unsaturated hydrocarbons

The homolytic addition of 1,3-oxathiolane to olefins takes place with the formation of 2-substituted 1,3-oxathiolanes and insignificant amounts of functional derivatives of sulfides.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 259–263, February, 1986.     

Insect pheromones and their analogs LV. Synthesis of trideca-4E, 7Z-dien-1-YL acetate-component of the sex pheromone ofPhthorimaea opercucella

Starting from propargyl alcohol and using the thermal Claisen rearrangement at the stage of constructing the (E)-double bond, we have synthesized trideca-4E, 7Z-dien-1-yl acetate— a component of the sex pheromone of the potato mothPhthorimaea opercucella (Zeller).Scientific-Research Institute of Fine Organic Synthesis, Academy of Sciences of the Republic of Bashkortostan, Ufa. Ufa State University of Petroleum Technology. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 452–455, May–June, 1997.     

Synthesis of methyl-branched low-molecularmass insect bioregulators from the products of the acid decyclization of 4-methyltetrahydropyran

This review generalizes work on the chemoselective synthesis of racemic methyl-branched insect pheromones and the juvenoid hydroprene from 1,5-bifunctional 3-methylpentanes produced by the acid opening of the ring of 4-methyltetrahydropyran.Institute of Organic Chemistry, Ufa Scientific Center, Russian Academy of Sciences. Scientific-Research Institute of Fine Organic Synthesis Academy of Sciences of the Republic of Bashkortostan, Ufa. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 170–177, March–April, 1977.     

Insect pheromones and their analogs. LVIII. Synthesis of hexadeca-7Z,11E-dien-1-yl acetate — a component of the sex pheromones ofPectinophora gossypiella andSitotroga cerealella

A new synthesis of hexadeca-7Z,11E-dien-1-yl acetate — a component of the sex pheromones of the pink bollworm (Pectinophora gossypiella) and the Angoumois grain moth (Sitotroga cerealella) — is proposed that is based on a thermal Claisen rearrangement.Scientific-Research Institute of Small-Tonnage Chemical Products and Reagents, Ufa, fax 8-(3472) 43 17 31. Ufa State Petrotechnical University. Institute of Petrochemistry and Catalysis, Academy of Sciences of the Republic of Bashkortistan, Ufa, fax-8(3472) 31 27 50. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 231–234, March–April, 1998.     

Homolytic alkylation of quinaldine and quinoxaline with 18-crown-6

Homolytic alkylation of protonated quinoxaline with 18-crown-6, initiated by the system pivalic acid-iron(II) sulfate at 20–25C, gives (quinoxalin-2-yl)-18-crown-6 in 85% yield. Under analogous conditions, the reaction with quinoline affords two isomers: (quinolin-4-yl)-18-crown-6 and (quinolin-2-yl)-18-crown-6, in yields of 20 and 30% respectively.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 75–76, January, 1988.     

Investigation of the intramembrane distribution of chlorin e6 derivatives by using fluorescence quenching

Belarusian State University, 4, F. Skorina Ave., Minsk, 220050, Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 62, No. 2, pp. 179–187, March–April, 1995