Exibindo os resultados de 1 a 10 de 6529
Estimated frequency of B-chromosomes and population density of Astyanax scabripinnis paranae in a small stream
(Brazilian Journal of Genetics, 1997-09-01) [Artigo]
Um estudo comparativo foi realizado em exemplares de Astyanax scabripinnis paranae, envolvendo a freqüência de indivíduos portadores de cromossomos B e a densidade populacional desta espécie em três trechos consecutivos ...
Associated symmetric quadrature rules
(Applied Numerical Mathematics, 1996-06-01) [Artigo]
We prove a relation between two different types of symmetric quadrature rules, where one of the types is the classical symmetric interpolatory quadrature rules. Some applications of a new quadrature rule which was obtained ...
Estimativas de herdabilidade e proposição de índices de seleção em Hereford no Rio Grande do Sul
(Pesquisa Agropecuária Brasileira, 1991-08-01) [Artigo]
A total of 8,064 records from weaning weights and conformation scores traits of calves nearly seven month-old were studied. The study included animals from 22 herds from state of Rio Grande do Sul, borned from 1973 to 1985 ...
Macroalgae of a stream in southeastern Brazil: composition, seasonal variation and relation to physical and chemical variables
(Hydrobiologia, 1991-05-01) [Artigo]
Macroalgal seasonality was studied monthly in a second-order stream in the north-west of São Paulo State, S.E. Brazil. Seasonal variation was based on frequency and percentage cover. Seven species were found during the ...
Características ultra-estruturais das células de Sertoli do morecego hematófago (Desmodus rotundus rotundus, Geoffrey, 1810).
(Revista Brasileira de Biologia, 1993-11-01) [Artigo]
This paper deals with the ultrastructural study of mature vampire bat Sertoli cells and their relationships with the different stages of testicular germ cells. In vampire bat seminiferous epithelium there are different ...
Lithium intercalation into double rare earth chromates
(Journal of Alloys and Compounds, 1994-07-01) [Artigo]
Lithium intercalation into double rare earth chromates was carried out. It was found that the compounds NaxLi1-xLa(CrO4)2 belong to the NaLa(CrO4)2 structural type and may be recommended as fast ionic conductors. At small ...
A new approach to the electronic structure of two dimensional disordered alloys
(Solid State Communications, 1995-06-01) [Artigo]
We propose a novel method to calculate the electronic Density of States (DOS) of a two dimensional disordered binary alloy. The method is highly reliable and numerically efficient, and Short Range Order (SRO) correlations ...
Papilomavirus Humano (HPV) - Um estudo de revisao
(Revista de Ciencias Farmaceuticas, 1999-12-01) [Resenha]
Human Papillomaviruses (HPVs) are epitheliotropic viruses, that induce benign and malignant lesions on several body sites. It's a small circular DNA virus, non-enveloped and 75 types have been identified. Frequently HPV ...
GENETIC INTERRELATIONSHIPS OF PROTEOLYTIC CLOSTRIDIUM-BOTULINUM TYPE-A, TYPE-B, AND TYPE-F AND OTHER MEMBERS OF THE CLOSTRIDIUM-BOTULINUM COMPLEX AS REVEALED BY SMALL-SUBUNIT RIBOSOMAL-RNA GENE-SEQUENCES
(Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology, 1993-01-01) [Artigo]
The phylogenetic interrelationships of members of the Clostridium botulinum complex of species was investigated by direct sequencing of their 16S rRNA genes. Comparative analysis of the 16S rRNA sequences demonstrated the ...
MEASURED CHANGES IN PROTEIN HYDRATION IN THE MOLTEN GLOBULE TO RANDOM COIL TRANSITION OF APOMYOGLOBIN
(FASEB Journal, 1992-01-01) [Resumo]