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Biomedical subjects

A V Klimenko

Publications and source records attributed to A V Klimenko.

At least 19 recordsLinked to original sources
PubMed2006

Search for Theta+ (1540) Pentaquark in High-Statistics Measurement of gammap-->K0K+n at CLAS.

The exclusive reaction gammap-->K0K+n was studied in the photon energy range between 1.6 and 3.8 GeV searching for evidence of the exotic baryon Theta+ (1540)-->nK+. The decay to nK+requires the assignment of strangeness S=+1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb-1. No evidence for the Theta+ pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK+ mass. The 95% C.L. upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb.

Journal Article↗
PubMed2005

Onset of asymptotic scaling in deuteron photodisintegration.

We investigate the transition from the nucleon-meson to the quark-gluon description of the strong interaction using the photon energy dependence of the d(gamma,p)n differential cross section for photon energies above 0.5 GeV and center-of-mass proton angles between 30 degrees and 150 degrees. A possible signature for this transition is the onset of cross-section s(-11) scaling with the total energy squared, s, at some proton transverse momentum P(T). The results show that the scaling has been reached for proton transverse momentum above about 1.1 GeV/c. This may indicate that the quark-gluon regime is reached above this momentum.

Journal Article↗
PubMed2003

Photoproduction of the omega meson on the proton at large momentum transfer.

The differential cross section, dsigma/dt, for omega meson exclusive photoproduction on the proton above the resonance region (2.6<W<2.9 GeV) was measured up to a momentum transfer -t=5 GeV2 using the CLAS detector at Jefferson Laboratory. The omega channel was identified by detecting a proton and pi(+) in the final state and using the missing mass technique. While the low momentum transfer region shows the typical diffractive pattern expected from Pomeron and Reggeon exchange, at large -t the differential cross section has a flat behavior. This feature can be explained by introducing quark interchange processes in addition to the QCD-inspired two-gluon exchange.

Journal Article↗
PubMed2002

[Duodenoplasty in combination with segmentary resection of gastric corpus in preservation of innervated pyloric-antral segment in patients with decompensated duodenal stenosis of the ulcer origin].

A new method of surgical treatment of decompensated duodenal stenosis, consisting of duodenoplasty with duodenal ulcer excision, segmentary resection of gastric corpus with preservation of pyloroantral portion and formation of fundocorporoantrumanastomosis on the whole opening, was presented. In 24 patients in late follow-up terms after the operation the rhythmical, portional evacuation of gastric content was observed, the ulcer recurrency was not noted.

Adult↗
PubMed1985

[Manual therapy of patients with lumbar osteochondrosis with neurologic syndromes].

Manual therapy without any additional therapeutic means was given to 325 patients with reflex syndromes of lumbar osteochondritis in an acute stage or in the stage of exacerbation of recurrent osteochondritis. A series of 454 patients in the stationary stage of exacerbation of the disease with a chronic recurrent course received a multiple modality treatment including manual therapy. Efficacy of the treatment in both groups of the patients considerably exceeded that in patients treated with the conventional (medicamentous and physiotherapeutic) methods. A considerable economic effect was achieved as a result of reducing the period of treatment and cutting down on drugs in a substantial part of the patients.

Adult↗