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SciELO - Scientific Electronic Library Online (52,285 recursos)
SciELO (Scientific Electronic Library Online) is an electronic library covering a selected collection of Brazilian scientific journals. The objective of the site is to implement an electronic virtual library, providing full access to a collection of serial titles, a collection of issues from individual serial titles, as well as to the full text of articles. The project envisages the development of a common methodology for the preparation, storage, dissemination and evaluation of scientific literature in electronic format.

Mostrando recursos 21 - 40 de 112

21. Ecological and evolutionary pressures on leishmanial parasites - Shaw,Jeffrey

22. Conflicting genomes, the demic theory & biodiversity - Hoenigsberg,H.F.
Moreover, the presence of parasitic genomes as in acanthocephalan worms, which even manipulate suicidal behavior in their hosts; segregation distorters that change meiosis and Mendelian ratios; selfish genes and selfish whole chromosomes, such as the case of B-chromosomes in grasshoppers; P-elements in Drosophila; driving Y-chromosomes that manipulate sex ratios making males more frequent, as in Hamilton's X-linked drive; male strategists and outlaw genes, are eloquent examples of the presence of real conflicting genomes and of a non-uniform phenotypic coherence and genome harmony.

23. Brains and guts in human evolution: The Expensive Tissue Hypothesis - Aiello,Leslie C.
The brain is a very expensive organ in metabolic terms.

24. Sequence analysis of the catalytic domain of a Metarhizium anisopliae chitinase - Valadares-Inglis,Maria Cléria; Inglis,Peter W.; Peberdy,John F.
A 375-bp DNA fragment from Metarhizium anisopliae strain CG32 genomic DNA was amplified by PCR using chitinase-specific concensus primers.

25. Cephalosporin C production and genetic improvement of the fungus Acremonium chrysogenum based on morphological mutant isolation - Vialta,Airton; Ferreira Catani,Cleide; Bonatelli Junior,Renato; Azevedo,João Lúcio
C-10 strain of the fungus Acremonium chrysogenum produced about 1.5 g/l of cephalosporin C, a yield that was much lower than expected according to the literature.

26. Amylase and protease secretion in recombinant strains of Metarhizium anisopliae var. anisopliae following parasexual crosses - Valadares-Inglis,M.C.; Azevedo,J.L.
Analysis of recombinants for secretion of amylases and proteases demonstrated that stable prototrophic recombinants have similar levels of enzyme secretion.

27. Karyotype evolution in wasps of the genus Trypoxylon (subgenus Trypargilum) (Hymenoptera, Sphecidae) - Gomes,Luiz Fernando; das Graças Pompolo,Silvia; de Oliveira Campos,Lucio Antonio
nitidum (2K = 10AM + 18A + 2CC), T.

28. Characterization and distribution of supernumerary chromosomes in 23 colonies of Partamona helleri (Hymenoptera, Apidae, Meliponinae) - Magalhães Brito,Rute; Costa,Marco Antônio; Pompolo,Silvia G.
Partamona helleri has from zero to three supernumerary chromosomes.

29. Differences in the number of sensilla coeloconica and sensilla ampullacea of segment 10 of the antennae of Africanized and Caucasian bees and of their F1 hybrids - Stort,Antonio Carlos; Malaspina,Osmar
The numbers of sensilla coeloconica and sensilla ampullacea of segment 10 of the antennae of Caucasian and Africanized worker bees and of their hybrids were counted with the aid of a scanning electron microscope.

30. Chromosomal multiformity in Botanochara bonariensis (Coleoptera, Chrysomelidae, Cassidinae) - Stolar,C.E.; Bidau,C.J.
The Concepción del Uruguay sample showed 2n = 47 (male) and 2n = 48 (female), the male meioformula being 22 II + XpneoXneoyp.

31. The isozymatic pattern of alkaline phosphatase during ontogenetic development of Anastrepha fraterculus (Diptera: Tephritidae) - Nascimento,Jurema Cruz do; Oliveira,Alice Kalisz de
Eleven alkaline phosphatase (APH) electromorphs were detected during Anastrepha fraterculus (Diptera: Tephritidae) ontogenetic development.

32. Effects of Canola oil-based high fat diets on growth, fat deposition and serum triglyceride and cholesterol levels in lines of mice selected for high and low fat percentage - Benyon,L.S.; Eisen,E.J.; Jones,E.E.
This study was conducted to determine if there are biologically important interactions of genotypes of mice, differing in polygenically controlled body fat percentage, with levels of dietary fat from Canola oil which is rich in monounsaturated fat and low in saturated fat.

33. Cat genetic profiles in Catalonia, Spain - Ruiz-Garcia,Manuel; Alvarez,Diana
A study was made of three aspects of the genetic composition of some cat populations in Catalonia (Northeastern Iberian Peninsula, Spain).

34. Spatial genetic structure of the "Gos d?Atura" dog breed in Catalonia (Spain) - Ruiz-Garcia,Manuel; Jordana,Jordi
Six "Gos d?Atura" dog populations were studied in Catalonia (Spain) using 21 allozymic loci.

35. Karyotypic diversity and distribution in Hoplias malabaricus (Pisces, Erythrinidae): Cytotypes with 2n = 40 chromosomes - Bertollo,Luiz Antonio Carlos; Moreira-Filho,Orlando; Soares Fontes,Michel
Two cytotypes were denoted as types A and B.

36. Toxicity and genotoxicity of the fungicide triphenyltin hydroxide - Koppe Grisolia,Cesar; Bicalho-Valadares,Mércia E.
A study was made on the effect of triphenyltin hydroxide (TPTH) on the reproductive success of the snail Biomphalaria tenagophila and its genotoxicity in rat bone marrow cells in vivo and in human lymphocytes in vitro.

37. Benzidine- and diaminobenzidine-induced micronuclei in mice after intraperitoneal and oral single or multiple treatment - Gimmler-Luz,Maria Clara; Rodrigues de Andrade,Heloisa Helena; Marafon-Bayer,Andréa Tozzo
The capacity of benzidine and its derivative diaminobenzidine to induce micronuclei in bone marrow polychromatic erythrocytes was tested in two mouse strains, C57BL/6 and BALB/c, after intraperitoneal injection or gavage on one, two or three successive days.

38. Extrusion of yolk masses by hybrid embryos of two cryptic species of Anastrepha fraterculus (Diptera, Tephritidae) - Selivon,Denise; Perondini,André Luiz P.
Embryos of two cryptic species of Anastrepha fraterculus (type I and type II) differ in the frequencies at which masses of yolk are extruded from their extremities.

39. Cytochemistry of DNA, RNA and nuclear proteins - Mello,Maria Luiza S.
Classical (Feulgen, basophilia and acidophilia reactions and optical anisotropy) and recently developed (critical electrolyte concentration - usual and variant techniques -, tests for apoptosis and AgNOR image analysis) tests for the cytochemistry of DNA, RNA and nuclear proteins are briefly considered in the context of in vitro and in situ research situations.

40. Evaluation of inbred lines from two maize (Zea mays L.) brachytic populations in single crosses following the two-factor mating design - Martins,Carlos S.; Miranda Filho,José B.
Thirty dent and 15 flint inbred (S5) lines from the brachytic maize (Zea mays L.) populations ?Piranão-VD2B.

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