Synthesis of O-maltosides and O-melibiosides of serine derivatives

Conclusions We synthesized the O-maltosides and O-melibiosides of N-carbobenzoxy-L-serine methylamide and L-serine methylamide.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2509–2514, November, 1969.     

Synthesis of o-glycosides of dipeptides containingβ-hydroxy amino acids

Conclusions The O--D-galactopyranosides of some serine-containing dipeptides were synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2092–2094, September, 1971.     

Synthesis of bacterial antigenic polysaccharides and their fragments 9. Synthesis of the trisaccharide repeating unit of the O-specific polysaccharide of Salmonella newington with a radioactive label in the mannose residue

Conclusions The total acetate of -D-mannopyranosyl-2-³H-(1 4)--L-rhamnopyranosyl-(1 3)-D-galactopyranose] has been synthesized by introducing the radioactive label into the mannose residue during NaBH₄-³H reduction of 4-0-(3,4,6-tri-O-benzyl--D-arabinohexylosopyranosyl)-2,3-O-isopropylidene--benzyl-L-rhamnoside.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2124–2128, September, 1978.The authors wish to thank N. É. Bairamova, M. V. Ovchinnikov, and V. I. Torgov for supplying the starting materials and for valuable consultations.     

The Bargmann-Wigner formalism for spin 2 fields

The Bargmann-Wigner formalism has been applied to describe the spin-2 field in terms of the symmetric fourth-rank multi-Dirac spinor Ψ_αβγδ. A serious problem of the standard anzatz is that the resulting equation of motion has the trivial solution with all field components being independently equal to zero. We here show that this problem is an artefact of the neglection of terms containing the matrix γ⁵ in the decomposition of ϕ into the Clifford algebra basis. We further emphasize importance of the gauge 4-vector field in that respect.