1,255 research outputs found
Free amino acids of the blood and some organs in hypokinesia
The metabolic fund of amino acids of the blood and tissues of rats under hypokinesia was investigated. The content of free amino acids was determined for the liver, kidney, brain, and the skeletal and cardiac muscles after established periods of hypokinesia. It was found that the total content of free amino acids in the experimental animals was, on the average 19 percent lower than in the controls. The results of the quantity of individual compounds indicate that the level of some were reduced while others were increased. It was also found that there was an unequal content of individual amino acids in the different tissues
Soft Pomeron and Lower-Trajectory Intercepts
We present a preliminary report on the determination of the intercepts and
couplings of the soft pomeron and of the rho/omega and f/a trajectories from
the largest data set available for all total cross sections and real parts of
the hadronic amplitudes. Factorization is reasonably satisfied by the pomeron
couplings, which allows us to make predictions on gamma gamma and gamma p total
cross sections. In addition we show that these data cannot discriminate between
fits based on a simple Regge pomeron-pole and on an asymptotic log^2s-type
behaviour, implying that the effect of unitarisation is negligible. Also we
examine the range of validity in energy of the fit, and the bounds that these
data place on the odderon and on the hard pomeron.Comment: 13 pages, LaTeX, 14 figures. Presented by K. Kang at a 4th Workshop
on Quantum Chromodynamics, June 1 - 6, 1998, The American University of
Paris, Paris, France, and at the 4th Workshop on Small-x and Diffractive
Physics, September 17 - 20, 1998, Fermi National Accelerator Laboratory,
Batavia, I
Analytic parametrizations of the non-perturbative Pomeron and QCD-inspired models
We consider several classes of analytic parametrizations of hadronic
scattering amplitudes, and compare their predictions to all available forward
data (proton- proton, antiproton-proton, pion-proton, kaon-proton,
photon-proton, photon- photon, sigma-proton). Although these parametrizations
are very close for energy larger than 9 GeV, it turns out that they differ
markedly at low energy, where a universal Pomeron term ~(ln s)**2 enables one
to extend the fit down to 4 GeV.Comment: 11 pages, 2 tables, Presented at the 9th Blois Workshop on Elastic
and Diffractive Scattering, Pruhonice, Czech Republic, 9-15 June 200
New measures of the quality and of the reliability of fits applied to forward hadronic data at t=0
We develop five new statistical measures of the quality of fits, which we
combine with the usual confidence level to determine the models which fit best
all available data for total cross sections and for the real part of the
forward hadronic amplitude.Comment: 7 pages, presented by J.R. Cudell on behalf of the COMPETE
collaboration at the 6th workshop on non-perturbative QCD, American
University of Paris, 5-9 June 200
Analytic Amplitude Models for Forward Scattering
We report on fits of a large class of analytic amplitude models for forward
scattering against the comprehensive data for all available reactions. To
differentiate the goodness of the fits of many possible parametrizations to a
large sample of data, we developed and used a set of quantitative indicators
measuring statistical quality of the fits over and beyond the typical criterion
of the . These indicators favor models with a universal
Pomeron term, which enables one to extend the fit down to GeV.Comment: 13 pages, COMPETE Collaboration, talk presented at the 9th
International Conference (Blois Workshop) on Elastic and Diffractive
Scatterin
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