98 research outputs found
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Results from the BNL E802 spectrometer for 14. 5 GeV/c per nucleon silicon beams
We present selected results of measurements of inclusive ..pi.., K, proton, and deuteron spectra from 14.5 A GeV/c Si collisions with various targets. Results of neutral energy and charged particle dN/d/eta/ measurements are also discussed. Large K to ..pi.. ratios are observed in Si + Au collisions. Results are compared to the Lund-Fritiof model. 11 refs., 11 figs
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Results for strange particle production from BNL experiment E802
Results are presented for inclusive measurements of ..pi.., K, proton and deuteron spectra from 14.5 A/center dot/GeV/c Si central collisions with Au targets. Pseudo-rapidity distributions of charged particles from a variety of targets are also shown. Ratios of K to ..pi.. yields are large and increase with p/sub /perpendicular// for Si + Au collisions. 4 refs., 11 figs
Molecular cytogenetic differentiation of paralogs of Hox paralogs in duplicated and re-diploidized genome of the North American paddlefish (Polyodon spathula)
Molecular analysis of phylogeographic subspecies in three Ponto-Caspian sturgeon species
Chromosome evolution in fishes: a new challenging proposal from Neotropical species
We present a database containing cytogenetic data of Neotropical actinopterygian fishes from Venezuela obtained in a single
laboratory for the first time. The results of this study include 103 species belonging to 74 genera assigned to 45 families and 17
out of the 40 teleost orders. In the group of marine fishes, the modal diploid number was 2n=48 represented in 60% of the
studied species, while in the freshwater fish group the modal diploid complement was 2n=54, represented in 21.21 % of the
studied species. The average number of chromosomes and the mean FN were statistically higher in freshwater fish than in
marine fish. The degree of diversification and karyotype variation was also higher in freshwater fish in contrast to a more
conserved cytogenetic pattern in marine fish. In contrast to the assumption according to which 48 acrocentric chromosomes
was basal chromosome number in fish, data here presented show that there is an obvious trend towards the reduction of the
diploid number of chromosomes from values near 2n=60 with high number of biarmed chromosomes in more basal species to
2n=48 acrocentric elements in more derived Actinopterygi
Observations on the skulls of sturgeons (Acipenseridae): shared similarities of Pseudoscaphirhynchus kaufmanni and juvenile specimens of Acipenser stellatus
The Vertical Distribution and Diurnal Migration of the Crustacea Amphipoda Collected During the SOND Cruise, 1965 I. The Gammaridea
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