Showing papers by "Sao Paulo State University published in 1983"
TL;DR: In this paper, a study was carried out on mitotic and meiotic chromosomes of four species of the genus Astyanax from three different water basins in the State of Sao Paulo, Brazil.
Abstract: SUMMARYA study was carried out on mitotic and meiotic chromosomes of four species of the genus Astyanax (Pisces, Characidae) from three different water basins in the State of Sao Paulo, Brazil. The following karyotypic characteristics were observed: A. bimaculatus, 2n = 50 (n = 25, FN = 86–88); A. fasciatus, 2n = 46 (n = 23, FN = 90); « A. fasciatus » from the Juquia river, 2n = 48 (n = 24, FN = 94); A. schubarti, 2n = 36 (n = 18, FN = 70) and A. scabripinnis paranae, 2n = 50 (n = 25, FN = 90–92). The diversity in the number and morphology of the chromosomes suggests a model of non-conservative karyotypic evolution in this genus, with chromosome rearrangements of the centric fusion/fission type and/or inversion playing an important role in these alterations. On the basis of its characteristics, A. schubarti has the most differentiated karyotype and, in view of the low diploid number and small number of subtelocentric-acrocentric chromosomes, is probably of most recent origin. The two karyotypes encountere...
99 citations
01 Dec 1983
TL;DR: In this paper, the authors reinterpreted these petrologic studies and their geological significance in the light of recent literature on the calcretes in the world, and the recent revision of Bauru Group stratigraphy.
Abstract: The calcareous sandstones and sandy limestones of the Bauru Group have been frequently mentioned in geologic literature of Brazil since the beginning of this century, but this Group has only recently been studied in detail and reliably divided into formations about two years ago. Only in 1973 was a detailed investigation carried out especially focusing on the petrologic, chemical and isotopic properties of these sediments, which for the first time were interpreted as calcretes. This paper reinterprets these petrologic studies and their geological significance in the light of recent literature on the calcretes in the world, and the recent revision of Bauru Group stratigraphy.
39 citations
TL;DR: The effects of different weed competition periods on some soybean yield parameters were studied in field trials with cultivars Santa Rosa and IAC-2 in two soils, "Latossol Roxo" and "Dark-Red Latossol - sandy phase", at Jaboticabal, Sao Paulo State, Brazil.
Abstract: The effects of different weed competition periods on some soybean yield parameters were studied in field trials with cultivars Santa Rosa and IAC-2 in two soils, "Latossol Roxo" and "Dark-Red Latossol - sandy phase", at Jaboticabal, Sao Paulo State, Brazil. The experimental design of randomized blocks was used. The cultivars were kept with and without weed competition since the emergence for periods of 0, 10, 20, 30, 40, 50 and 60 days. Based on the results the following conclusions may be drawn: the soybean crop should be kept free of weed competition during the first 30 to 40 days for cv. Santa Rosa and during the first 50 days for cv. IAC-2; for both cultivars yield increase was evident beyond first 20 days weeded in "Latossol Roxo" and 30 days for "Dark-Red Latossol - sandy phase", reaching the maximum value at 50th for Santa Rosa cultivar and around 60th days for 'IAC-2'; in the 1977/78 season (for "Latossol Roxo") weed competition during the first 20 days after emergence caused yield losses to both cultivars, whereas in the 1978/79 season ("Dark-Red Latossol -sandy phase") this period extended to 40 first days, showing the importance of edafic -climatic interferences and different weed species in the competition process; among all parameters related to the grain yield the number of pods per plant was the most affected by weed competition.
36 citations
TL;DR: In this paper, the authors measured the excess enthalpy of mixing of DMF-water at 25° C in the 0-1 molar fraction range and developed the maximum of heat for a 0.33 molar mixture.
36 citations
TL;DR: Many tRNAs ofE.
Abstract: Many tRNAs ofE. coli and yeast contain stretches whose base sequences are similar to those found in their respective rRNAs. The matches are too frequent and extensive to be attributed to coincidence. They are distributed without discernible pattern along and among the RNAs and between the two species. They occur in loops as well as in stems, among both conserved and non-conserved regions. Their distributions suggest that they reflect common ancestral origins rather than common functions, and that they represent true homologies.
32 citations
TL;DR: The evaluation of germination showed a strong negative allelopathic effect of C. rotundus tubers, S. halepense and C. dactylon roots, which inhibited germination of 'Santa Cruz' tomato seed also.
Abstract: O presente trabalho teve por finalidade avaliar os possiveis efeitos alelopaticos de tres plantas daninhas (Cyperus rotundus, Sorghum halepense e Cynodon dactylon), uma leguminosa (Canavalia ensiformis) e colza (Brassica napus), na germinacao das sementes do tomateiro (Lycopersicon esculentum cv. Santa Cruz) utilizado como indicador. Tuberculos de tiririca, rizomas de capim massambara, o sistema radicular de grama seda, alem de folhas e raizes de feijao-de-porco e colza, foram homogeneizados em solucao aquosa, submetidos a filtracao e centrifugacao. A aplicacao do sobrenadante no substrato de germinacao das sementes de tomateiro mostrou afetar o processo germinativo e o desenvolvimento da radicula e do hipocotilo. C. rotundus, S. halepense e raizes de C. ensiformis possuem substâncias altamente inibitorias a germinacao do tomateiro 'Santa Cruz'', sendo que a planta indicadora tambem mostrou-se sensivel as substâncias presentes nas folhas de B. napus e em C. dactylon.
25 citations
TL;DR: The structure of juruenolide, a constituent of Iryanthera juruensis and I. ulei is revised to (2S, 3R, 4S)-3-hydroxy-4-methyl-2-(19′-piperonyl-1′-n-nonadecyl)-butanolide as discussed by the authors.
25 citations
TL;DR: In this article, the first-forbidden charge exchange resonances are discussed in the framework of a schematic model and the screening of the weak coupling constants induced by both the giant resonances and the Δ-isobar is evaluated.
24 citations
TL;DR: A new species is described from the Serra do Cipo, Minas Gerais, Southeastern Brasil, which is related to T. miliaris (Spix), from which it is readily distinguished by its smaller size, broader head, larger tympanum, shorter legs, and dorsal pattern mottled.
Abstract: Thoropa megatympanum, sp. n., is described from the Serra do Cipo, Minas Gerais, Southeastern Brasil. The new species is related to T. miliaris (Spix), from which it is readily distinguished by its smaller size, broader head, larger tympanum, shorter legs, and dorsal pattern mottled. The eggs and the tadpole are also described.
24 citations
TL;DR: In this paper, an estimativa for the area foliar de Wissadula subpeltata (Kuntze Fries) is presented. But, as shown in Fig. 1, the estimação of the foliar real and the comprimento da folha ao longo da nervura principal (C), largura maxi ma da folhas (L), compriment do espaco entre o ponto de insercao do peciolo na folha (L) ate a primeira ramificacao da nerv
Abstract: Com o objetivo de obter uma equacao que, atraves de parâmetros lineares dimensionais das folhas, permitisse estimar a area foliar de Wissadula subpeltata (Kuntze) Fries, estudaram- se correlacoes entre a area foliar real e o comprimento da folha ao longo da nervura principal (C ), largura maxi ma da folha (L) , comprimento do espaco entre o ponto de insercao do peciolo na folha ate a primeira ramificacao da nervura principal (CE), L + C, L x C e L x CE. Todas as equacoes, geometricas ou lineares simples, permitiram boas estimativas da area foliar . Do pont o de vista pratico, sugere- se optar pela equacao linear simples envolvendo o produto C x L, considerando o coeficiente linear igual a zero. Deste modo, a estimativa da area foliar de W. subpeltata pode ser feita pel a formula Y = 0, 85 49 (C x L), ou seja 85 ,49% do produto entre o comprimento da nervura principal e a largura maxima da folha.
22 citations
TL;DR: Verificou-se that as condicoes sanitarias revelaram-se nao satisfatorias em 6 (5,7%) amostras de bebedouros quanto a coliformes fecais, sendo 3 (2,8%) tambem com relacao a Coliformes totais.
Abstract: Foram colhidas 105 amostras de agua sendo 44 de mananciais e de 61 bebedouros, a partir das quais foram realizadas as determinacoes dos NMP (Numero Mais Provavel) de bacterias coliformes totais e fecais. De acordo com a Portaria GM/0013 de 15 de janeiro de 1976, da Secretaria Especial do Meio Ambiente do Ministerio do Interior, os 44 mananciais revelaram-se dentro dos parâmetros estabelecidos. Embora nao haja referencia com relacao a bebedouros, aplicando-se os valores estabelecidos para mananciais, das 61 amostras estudadas, somente 6 (9,8%) nao poderiam ser usadas para a dessedentacao de animais. Das 105 amostras analisadas, verificou-se que as condicoes sanitarias revelaram-se nao satisfatorias em 6 (5,7%) amostras de bebedouros quanto a coliformes fecais, sendo 3 (2,8%) tambem com relacao a coliformes totais.
01 Jan 1983
TL;DR: The mitotic and meiotic chromosomes of two groups of the iguanid lizard Tropidurus torquatus were studied after conventional staining, G- and C-banding and silver staining of nucleolar-organizer regions and karyotypic variations involving the microchromosomes were observed.
Abstract: The mitotic and meiotic chromosomes of two groups of the iguanid lizard Tropidurus torquatus were studied after conventional staining, G- and C-banding and silver staining of nucleolar-organizer regions. Karyotypic variations involving the microchromosomes were observed in both groups and are, probably, related to the mechanisms of sex determination of the X1X2Y/X1X1X2X2 type in the one group, and of the XY/XX type in the other.
01 Jan 1983
01 Jan 1983
Journal Article•
01 Jan 1983
14 Dec 1983
TL;DR: Atraves de femeas ovigeras de Paguristes tortugae Schmitt, 1933, coletadas no litoral Norte do Estado of Sao Paulo, Brasil, estudou-se a metamorfose, em laboratorio, com enfase especial na morfolcgia externa de cada um dos estagios larvais.
Abstract: Atraves de femeas ovigeras de Paguristes tortugae Schmitt, 1933, coletadas no litoral Norte do Estado de Sao Paulo, Brasil, estudou-se a metamorfose, em laboratorio, com enfase especial na morfolcgia externa de cada um dos estagios larvais. Ilustracoes e descricoes detalhadas sao apresentadas para mostrar a sequencia das mudanas que ocorrem no decorrer do desenvolvimento. Os experimentos foram efetuados em sala climatica com temperatura de 25°C, utilizando-se agua do mar com salinidade constante de 35°/oo. As larvas foram mantidas individualmente e o alimento oferecido consistiu de nauplius de Artemia salina. O desenvolvimento pos-embrionario de P. tortugae compreende tres estagios na fase de zoea e um na fase de megalopa envolvendo treze ou quatorze dias de duracao. A analise comparativa da metamorfose de P. tortugae com as demais especies da familia Dicgenidae, evidencia uma grande semelhanca com Paguristes spinipes Milne-Edwards, 1880, que tambem ocorre no Brasil e que foi estudada por Provenzano (1978). As principais diferencas morfologicas entre os estagios de zoea e megalopa, destas duas especies, sao tambem apresentadas.
06 Jul 1983
TL;DR: In this paper, the Bauru Group sedimentation has been studied and its fossiliferous content has been used as an argument in support of intervals of warm and humid paleoclimate.
Abstract: Numerous papers have been published on the Bauru Group, which represents the most important Cretaceous continental deposits in Brazil. Nevertheless, paleoclimatic evidence was rarely discussed. This work deals with the calcrete deposits, atapulgite clay mineral, rudaceous deposits, immaturity of sediments and geochemical properties as evidence of warm and dry (semi-arid) paleoclimate during the greatest part of the Bauru Group sedimentation. On the other hand, its fossiliferous content must be considered as an argument in support of intervals of warm and humid paleoclimate.
14 Dec 1983
TL;DR: O trabalho foi realizado com a finalidade de descrever a anatomia externa das larvas de Clibanarius antillensis STIMPSON, 1859 criadas em laboratorio e o estadio de zoea e megalopa foram descritos.
Abstract: Este trabalho foi realizado com a finalidade de descrever a anatomia externa das larvas de Clibanarius antillensis STIMPSON, 1859 criadas em laboratorio. Os estadio de zoea e megalopa foram descritos. Femeas ovigeras foram coletadas em praias de S. Sebastiao, Sao Paulo, Brasil. Os animais foram mantidos ate a eclosao no laboratorio em agua do mar filtrada (salinidade 35 °/oo). As larvas foram criadas individualmente e alimentadas com nauplius de Artemia salina e a agua foi mudada diariamente. Quatro ou cinco estadios de zoea e megalopa foram obtidos e o periodo de desenvolvimento foi completado em 39 dias (valor medio) a 18,8°C e 29 dias a 22°C. Comparacoes anatomicas foram feitas com larvas de outras especies brasileiras particularmente com as do mesmo genero. Observou- se estreita correlacao entre C.antillensis e C. vittatus (Bosc, 1802).
TL;DR: In this paper, a comparative study was conducted on the healing process of the dental socket after simple extraction or extraction after bony plate removal, and the last procedure was associated with more intense inflammatory reactions, delayed healing, and morphological alterations of the alveolar crest.
Abstract: A comparative study was conducted on the healing process of the dental socket after simple extraction or extraction after bony plate removal. The last procedure was associated with more intense inflammatory reactions, delayed healing, and morphological alterations of the alveolar crest.Seventy-two male albino rats were used. Their upper right incisors were extracted with forceps through the alveolar route or after elevation of a mucoperiosteal flap and partial removal of the buccal bony plate; the wounds were sutured. The animals were sacrificed after 1, 3, 6, 9, 15 and 21 days. The pieces of jaw containing the dental alveoli were processed for routine histological analysis. Semi-serial sections stained with hematoxylin and eosin showed that the removal of the buccal bony plate was related to: (1) a more intense and prolonged inflammatory reaction within the socket, (2) a delayed chronological evolution of its healing process, (3) early connective tissue neoformation near the edges of the sectioned bony tissue, and (4) a shape loss of the alveolar crest at the cervical third.
TL;DR: The data suggest that Polybia (Myrapetra) paulista colonies are established by means of swarm formation having the existence of an initial polygyny and a pleometrose being proved.
Abstract: The data suggest that Polybia (Myrapetra) paulista colonies are established by means of swarm formation having the existence of an initial polygyny and a pleometrose being proved. The reproductive forms are produced once a year (at the start of the year); however, the colonies can last for two or three years. The observations evidenced that the duration of a development period is about 100 days.
TL;DR: Karyotypic analyses of 41 specimens of Forpus xanlhopterygius reveal a diploid number of 86 and three different karyotypes were observed and it is suggested that the observed polymorphism resulted from a translocation involving pairs 1 and 5.
Abstract: SUMMARYKaryotypic analyses of 41 specimens of Forpus xanlhopterygius (Psittaciformes: Aves) reveal a diploid number of 86 and three different karyotypes were observed. A chromosomal polymorphism is present which involves two pairs of chromosomes. It is suggested that the observed polymorphism resulted from a translocation involving pairs 1 and 5. The significance of this intrapopulation variation is discussed.
TL;DR: It is concluded that a short initial period (20-30 days) free of weed competition, was enough to avoid negative effects, in the final plants height, shoot diameter and height of inferior pod insertion, and on the other hand to keep the protein, ether-extract and ash content at normal level in both culti vars and soils studied.
Abstract: Foram, conduzidos experimentos de campo com os cultivares Santa Rosa e IAC-2 em dois tipos de solos, Latossol Roxo e Latossol Vermelho Escuro - fase arenosa, no Municipio, de Jaboticabal (SP), com o objetivo de estudar a influencia do periodo de competicao das plantas daninhas sobre algumas caracteristicas morfologicas relacionadas a producao e composicao quimica dos graos, na cultura da soja O delineamento experimental utilizado foi o de blocos ao acaso, sendo os cultivares mantidos sem e com matocompeticao por periodos cujas extensoes foram 0, 10, 20, 30, 40, 50 e 60 dias apos a emergencia Com base nos resultados obtidos, pode-se chegar a conclusao que um periodo inicial curto (20 a 30 dias) livre da matocompeticao, foi suficiente para que nao ocorressem efeitos negativos, estatisticamente significativos, na altura final das plantas, no diâmetro do caule e na altura de insercao da vagem mais baixa, alem de ser suficiente para que os teores de proteina, extrato-etereo e cinzas, dos graos, se mantivessem dentro dos valores normais esperados para os dois cultivares, nos solos estudados
TL;DR: Exame microbiologico em 24 amostras de sorvetes nao pasteurizados, todos preparados de maneira nao industrial e a base of leite, verificou a presenca de microrgarnismos deteriorantes e daqueles indicadores de poluicao de origem fecal.
Abstract: Realizou-se exame microbiologico em 24 amostras de sorvetes nao pasteurizados, todos preparados de maneira nao industrial e a base de leite (creme, nata, chocolate), fabricados por 12 sorveterias diferentes da cidade de Araraquara, SP. Colheram-se duas amostras de cada sorveteria com intervalo de 15 dias entre as colheitas. Realizaram-se as seguintes provas: contagem de bacterias aerobicas ou facultativas mesofilas e psicrofilas e de Staphylococcus aureus; determinacao do Numero Mais Provavel (NMP) de coliformes totais e fecais e da presenca de Salmonella. As tecnicas utilizadas foram aquelas convencionalmente usadas para tais determinacoes. Nao foi encontrada Salmonella em nenhuma das amostras e de cerca de 16,6% delas isolou-se Staphylococcus aureus. Em proporcoes variaveis verificou-se a presenca de microrgarnismos deteriorantes e daqueles indicadores de poluicao de origem fecal.
TL;DR: In this paper, amostras de calha foram coletadas em 60 locais entre Belem (Brasil) ate Iquitos (Peru).
Abstract: Com a intencao de verificar a origem do material transportado pelo Rio Amazonas, amostras de calha foram coletadas em 60 locais entre Belem (Brasil) ate Iquitos (Peru). Tendo sido escolhidos 28 amostras, as mesmas foram submetidas a um estudo mineralogico, o qual revelou os seguintes minerais pesados presentes: turmalina, zircao, granada, estaurolita, hiperstenio, piroxenio (augita), anfibolio (hornblenda), tremolita, magnetita ou ilmenita e leucoxenio. Em quase todas as amostras ocorre uma grande quantidade de minerais instaveis idiomorficos, como hiperstenio, augita e anfibolio, indicando uma area fonte constituida pelas rochas basicas e ultrabasicas, diminuindo para jusatite. Minerais estaveis, como zircao e turmalina, apresentam-se tanto angulosos como arredondados, indicando mais de uma area fonte, mas de qualquer modo sempre a partir de rochas acidas. Aplicando aos dados o metodo classificatorio multivariante da analise de agrupamentcs (cluster analysis), dois maiores grupos de amostras foram ressaltados: um constituido por amostras localizadas no alto Rio Amazonas e com maior teor em minerais instaveis, provavelmente com origem andina; o outro formado principalmente por amostras que se localizam, a partir da confluencia com o Rio Jurua, ate Belem e contendo uma alta porcentagem em zircao e turmalina, indicando alem de uma contribuicao andina, fontes nos escudos precambrianos a norte e sul do Rio Amazonas.
01 Jan 1983
Journal Article•
01 Jan 1983