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1.
E Giannazzo F Licata G Li Volsi G Mio F Santangelo M Scivoli 《Bollettino della Società italiana di biologia sperimentale》1992,68(11):677-683
A computer-assisted analysis of the spatial distribution of neurons having homogeneous characteristics is described in this paper. The camera lucida drawings of sections of a brain nucleus and the points representing the neurons labeled on the basis of a specific behavior of discharge rates were digitized on a personal computer Amiga 2000 or IBM compatible. Our software provided: a) the computerized, stereotaxically oriented reconstruction of the stored sections and of the plotted neurons; b) the identification within each section of the mass center (MC) of the units sharing a given behavior and of the area where the density of such neurons was maximal (MDA). The routine was tested on the spatial distribution of neuronal responses to serotonin in the lateral vestibular nucleus. 相似文献
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Satratoxins H and G, verrucarin J, and roridin E were isolated from the bedding straw of 200 sport horses exhibiting typical symptoms of stachybotryo-toxicosis. At the same time, the oat feed consumed by the horses contained non-macrocyclicFusarium trichothecenes: T-2 toxin and diacetoxyscirpenol. 相似文献
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Paraskeva Michailova Ninel Petrova Lillian Ramella Gabriella Sella Jordanka Todorova Vincenzo Zelano 《Genetica》1996,98(2):161-178
A population of Chironomus riparius from a Po river station near Moncalieri (a trace-metal polluted station) was studied. In this population was established a great variability of band structure of polytene chromosomes as well as paracentric heterozygous inversions, deletions, deficiencies, partial breaks, diploid chromosome fragments, and changes in functional activity and appearance of heterochromatin. In arms A through F, some bands had an increased size compared to the standard chromosomic map. Some bands appeared in a heterozygous or normal homozygous state or were amplified. In all arms, many condensed stable bands appeared in the decondensed state when compared to the standard map. Asynaptic zones in arms E and G as well as heterozygous Balbiani rings and NORs were established. Very often the 4th chromosome was almost completely heteropycnotic and looded like a pompon chromosome. For the first time in this species, a high frequency of ectopic pairings of different arms was observed. Telomeric regions involved in ectopic pairings had a granular appearance, as did some centromeres. The hypothesis is advanced that such a high frequency of structural rearrangements could be correlated with genomic distribution of specific mobile elements. 相似文献
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Matthew Breen Gabriella Lindgren Matthew M. Binns Julianne Norman Zlaka Irvin Kevin Bell Kaj Sandberg Hans Ellegren 《Mammalian genome》1997,8(4):267-273
Twenty equine microsatellites were isolated from a genomic phage library, and their genetical and physical localization was
sought by linkage mapping and fluorescent in situ hybridization (FISH). Nineteen of the markers were found to be polymorphic
with, in most cases, heterozygosities exceeding 50%. The markers were mapped in a Swedish reference family for gene mapping,
comprising eight half-sib families from Standardbred and Icelandic horse sires. Segregation was analyzed against a set of
35 other markers typed in the pedigree. Thirteen of the microsatellites showed linkage to at least one other marker, with
a total of 21 markers being involved in these linkages. In parallel, 18 of the microsatellites could be assigned to their
chromosomal region by FISH. These assignments involved eight equine autosomes: ECA1, 2, 4, 6, 9, 10, 15, and 16. The genetical
and physical mappings revealed by this study represent a significant extension of the current knowledge of the equine genome
map.
Received: 24 September 1996 / Accepted: 1 December 1996 相似文献