Two-photon Raman excitation and coherent anti-Stokes Raman spectroscopy probing of population changes in polyatomic molecules: a novel nonlinear optical technique for vibrational-relaxation studies.

Two-photon Raman excitation is used to populate selectively vibrational states in CO(2) and SF(6). The collisional population of 01(1)0, 02(2)0, 03(1)0, 11(1)0, etc. by means of 10 degrees 0 and 02 degrees 0 states in CO(2) gas is studied by coherent anti-Stokes Raman spectroscopy. No population transfer is observed between Fermi-resonant CO(2)(10 degrees 0) and CO(2)(02 degrees 0) states with the rate constant K greater, similar 7 10(4) sec(-1) Torr(-1). The lifetime of the SF(6)(100000) state is found to be taurho greater, similar 15 microsec Torr.

[Results of bone homoplasty in ununited fractures, pseudarthroses and defects of the long tumular bones]. / Rezul'taty kostnoi gomoplastiki pri nesrastaiushchikhsia perelomakh, lozhnykh sustavakh i defektakh dlinnykh trubchatykh kostei

In the article, observations on application of bone homoplasty in 99 patients with unhealing fractures, pseudarthrosis and defects of long tumular bones are described. Homoplasty per se was performed in 22 cases, in combination with autoplasty--in 3, with metallic osteosynthesis--in 74. Tubular homografts were used in 14 cases, grafts in a kind of cortical plates--in 85. Postoperatively, the patients were followed within the terms up to 5 years. In 88 cases the results of surgery were satisfactory, in 11--poor. An analysis of the material concerned have shown that issues of bone homoplasty are greatly effected by the character of the graft, surgical technic and the state of a recipient bed.