Showing papers by "Sao Paulo State University published in 1981"

Constitutive heterochromatin and nucleolus organizer region in the knifefish,Apteronotus albifrons (Pisces, Apteronotidae)

Abstract: The C-banding and silver staining of the chromosomes of the knifefishApteronotus albifrons (2n=24), demonstrated the presence of constitutive heterochromatin in the centromeric region of every chromosome, except pair 4, where the entire long arm was darkly stained, the silver stain positive nucleolus organizer region (NOR) being embedded in it.

Historical note - the extraordinary handless and footless families of brazil - 50 years of acheiropodia

Abstract: The history of acheiropodia is divided into 4 phases: discovery, exploration, modern studies, and contemporary knowledge. The discovery phase (1929-1930) is represented by the publication of the 1st family. For about 30 years, it remained the only family referred to in a number of textbooks of medicine, biology, and others. In the exploration phase (1956-1966), the first family was reanalyzed, other families were ascertained and analysed, and some radiologic aspects of the anomaly were published. The modern phase (1968-1972) is characterized by a large series of studies on the clinical aspects of acheiropodia, including laboratory and radiological examinations, psychological tests, status of vision, electrocardiograms, etc. In the contemporary phase (since 1974), genetic aspects prevailed, and studies were published on segregation analysis, selection pressure, genetic load, mutation rate, etc. Each one of these 4 phases is analyzed in detail.

Interaction between the diazo dye, “Vermelho Reanil” P8B, and Neurospora crassa strain 74A

Abstract: The cultivation of Neurospora crassa, strain 74A, in Neurospora complete medium containing a azo dye, “Vermelho Reanil P8B” from Imperial Chemical Industries showed that after 24 h of contact, most of the dye was removed from the medium. The greatest extent of dye removal (91.3 to 89.1%) was achieved when the concentration of the dye was between 16.0 and 32.0 μg ml−1 which is the range found in industrial wastes. The biomass production was unaffected in the presence of the dye at all the concentrations analysed.

Efeitos do período de matocompetição sobre a produtividade do amendoim (Arachis hipogaea L.)

Abstract: Com o objetivo de estudar os efeitos de diferentes periodos de competicao das plantas daninhas sobre alguns parâmetros produtivos da cultura do amendoim cv. Tatu-53, foi instalada e conduzida a presente pesquisa, em Jaboticabal, em solo Latossol Vermelho Escuro - fase arenosa. O delineamento experimental utilizado foi o de blocos casualizados, sendo os tratamentos divididos em dois grupos: no primeiro, a cultura foi mantida no mato desde a germinacao ate determinada fase de seu ciclo de desenvolvimento e, no segundo a cultura foi conservada livre da competicao por periodos equ ivalentes ao primeiro grupo, apos o qual o mato foi deixado crescer livremente. As extensoes dos periodos estudados foram, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 e 100 dias. Nas condicoes em que foi desenvolvido o experimento, o amendoim mostrou-se relativamente tolerante a competicao de maneira que um periodo de 10 dias livre das plantas daninhas no inicio de seu ciclo de desenvolvimento proporcionou -lhe condicoes ple nas de produtividade, comparada a te stemunha no limpo. Por outro lado, quando foi pe rmitido que o mato desenvolvesse desde o inicio do ciclo de cultura, o periodo acima do qual a competicao alterou a produtividade de cultura foi igual ou superior a 50 dias.

Nucleolar Organizer Activity and its Regulatory Mechanisms in Drosophila Species of the ‘Mulleri’ Complex and their Hybrids

Abstract: SUMMARYThe nucleolar organizer activity was studied in the salivary gland cells of Drosophila species from the ‘mulleri’ complex and their hybrids. The association of nucleoli with chromosomes showed that intraspecifically the X chromosome and the microchromosome are involved in the nucleolar synthesis in every case: the first as the main nucleolus organizer and the second apparently as a minor site operating in a low number of cells. Hybrids, however, revealed interspecific differentiation in the nucleolar activity and its control. In the female progeny from every interspecific combination nucleolar dominance was a constant feature, but the specific origin of the dominant nucleolar organizer varied among different combinations. In the male hybrids interspecific variation was detected by the occurrence, in some combinations, of an activation of the microchromosome to operate like the main NO, associated with gene amplification. The degree of gene amplification was another feature which varied among those ...

Os estudos geopolíticos no Brasil: uma contribuição para sua avaliação

Abstract: Departamento de Ciencias Politicas e Economicas - Faculdade de Educacao, Filosofia, Ciencias Sociais e da Documentacao, Unesp - Marilia.

A study of multiple mating habit in Atta laevigata based on the DNA content

Abstract: Departamento de Bioquimica Instituto de Biociencias Universidade Estadual Paulista Julio de Mesquita Filho, Campus de Rio Claro, C.p. 178, cep, 13.500 Rio Claro, Estado de Sao Paulo

Exigências nutricionais do sorgo sacarino

Abstract: As exigencias nutricionais de dois cultivares de sorgo sacarino (Brandes e Rio) foram estudadas em condicao de campo e em casa de vegetacao com cultivo em solucao nutritiva. O ensaio em casa de vegetacao foi conduzido em bandejoes de 40 1 de capacidade contendo solucao nutritiva de Hoagland e Arnon, e no campo, foram amostradas plantas que receberam adubacao com 150-200-100 kg/ha de N, P2O5 e K2O, respectivamente. A ordem decrescente de exigencias em casa de vegetacao foi: K, N, Ca, Mg, P, S e Fe, Mn, Cu, Zn. Considerando a colheita dos colmos e dos graos, o cultivar Brandes exportou 55% do N, 41% do P, 68% do K, 16% do Ca, 38% do Mg, 47% do S, 6% do Fe, 55% do Cu, 10% do Mn e 14% do Zn absorvidos, e o cultivar Rio exportou 59% do N, 43% do P, 72% do K, 10% do Ca, 44% do Mg, 60% do S, 1% do Fe, 66% do Cu, 8% do Mn e 10% do Zn absorvidos, em casa de vegetacao. Em condicao de campo, as exigencias para produzir 1 tonelada de colmo foram de 3,22 a 3,93 kg de N, de 0,40 a 0,45 kg de P, de 3,91 a 4,3i kg de K, de o,02 a 0,77 kg de Ca, de 0,86 a 0,54 kg de Mg; de 0,32 a 0,41 kg de S, de 68,82 a 36,71 g de Fe, de 3,48 a 2,94 kg de Cu, de 16,43 a 18,05 g de Mn, de 7,72 a 8,77 g de Zn e de 17,99 a 20,47g de B.

Chromosome variability in Brazilian specimens of Rattus rattus (2n=38)

Abstract: Universidade Estadual Paulista, Departamento de Biologia, Instituto de Biociencias, 13.500, Rio Claro, SP, Brasil

Contribuição ao estudo da Formação Caiuá

Abstract: This paper presents data on the stratigraphic position of the Caiua Formation based on sedimentological analysis of samples taken from a semi-artesian well drilled in Maraba Paulista in the southwestern region of Sao Paulo State. The data reveal a transitional variation between the Caiua and Hauro Formation, suggesting the existence of a basal fades of the Hauro Formation between the two. The sedimentological evidences obtained indicate that the Caiua Formation is beneath the Hauru Formation with the chronostratigraphic consequence confirming the pre-Hauru, cretaceous age attributed to the Caiua Formation.

Acumulação de matéria seca e macronutrientes pelo sorgo sacarino

Abstract: Samples of two varieties of sweet .sorghum (Brandes and Rio) grown on a Dark Red Latosol (Barra Bonita, SP) were collected and analysed (dry matter and macronutrient contents) at intervals of 20 days. Both varieties showed faster uptake of most of the nutrients between flower initiation and head formation. Variety Brandes, in said period, took up more nutrients per day than the other, although its cycle was longer.