Showing papers by "Sao Paulo State University published in 1979"

As bases fenomenológicas da geografia

Abstract: Phenomenology has to do with principles, with the origins of meanings and experience. It concerns phenomena such as anxiety, behavior, religion, place and topophilia.

Regulation of R-protein and endonuclease activities in meiocytes by homologous chromosome pairing

Abstract: Achiasmate meiocytes of Lilium cv. Black Beauty do not undergo DNA nicking at pachytene, nor do they acquire the high level of R-protein during zygotene-pachytene that is characteristic of chiasmate types. Induction of tetraploidy in such meiocytes with its accompanying increase in chiasma frequency results in a pachytene nicking pattern that is indistinguishable from what occurs in chiasmate plants. R-protein also increases to a level that on a per diploid genome basis is at least as high, and probably higher, than the level of chiasmate diploids. The absence of nicking in the achiasmate diploid is not due to a lack of appropriate enzyme activity but seems to result from the fact that unpaired or ineffectively paired chromosome regions are not accessible to the enzyme. The regulation of R-protein level by homologous pairing is examined but remains poorly understood.

The effect of colchicine on meiosis in Lilium speciosum cv. “Rosemede”

Abstract: Chromosome pairing and chiasma frequency were studied in meiocytes at diakinesis of Lilium speciosum cv. “Rosemede” fixed up to 21 days after the start of either continuous or 3 day pulse colchicine treatment. The two treatments gave similar results. In pulse treated pollen mother cells (PMCs) the mean chiasma frequency per cell fell from 26.4 in controls to 8.5 after fourteen days while the mean number of univalents per cell increased from 0.05 to 17.58. There was a negative correlation between mean chiasma frequency per bivalent and per PMC in colchicine treated buds; univalents were preferentially induced in bivalents with one chiasma, and preferentially excluded in bivalents with 4 chiasmata. Some chiasmata were redistributed to surviving bivalents despite the concurrent reduction in chiasma frequency per meiocyte. — Colchicine sensitivity began in premeiotic interphase and extended to mid or late zygotene in PMCs; ongoing synapsis was unaffected. However, susceptibility to univalency was asynchronous between bivalents occurring at zygotene in short chromosomes but at late premeiotic interphase in the longest chromosomes. The number of chiasmata per bivalent could be altered by colchicine without inducing univalents, but the ultimate effect was to reduce the number of chiasmata per bivalent (or per chromosome arm) directly to zero. The major factors determining the order and extent of reduced pairing and chiasma number were total chromosome length and arm length. Pairing and chiasma formation in embryo sac mother cells were less sensitive to colchicine than in PMCs, but their behavior was otherwise similar.

Cytological investigations of the effect of colchicine on meiosis in Lilium hybrid cv. “Black Beauty” microsporocytes

Abstract: Using colchicine, two methods have been successfully applied for the induction of tetraploid meiocytes at premeiotic mitosis in the near achiasmate diploid hybrid cultivar “Black Beauty” of Lilium. The experiments were aimed at understanding whether the achiasmate condition is attributable to insufficient homology for effective pairing or to some genie defect in order to interpret the data obtained from molecular studies. Cytological observations demonstrate a strong correlation between the induction of tetraploidy and subsequent chiasma formation. The chiasma frequency per cell in untreated diploid control meiocytes ranged from 0 to 8 (mean 2.25), while in colchicine treated undoubled cells sampled 14±2 days after the start of treatment it ranged from 0 to 2 (mean 0.148). By comparison, the chiasma frequency per cell in colchicine-doubled tetraploid cells ranged from 29 to 51 (mean 42.24), such cells showing complete or near complete bivalent pairing. These results, similar to those reported previously for other higher plant species, demonstrate that the achiasmatic condition in “Black Beauty” is not due to a genie defect. The methods developed have made possible hitherto inaccessible biochemical analyses of meiocytes that had been treated with colchicine or other chemicals at premeiotic stages.

A sedimentacao do grupo Passa Dois (exclusive formacao Irati): um modelo geomorfico

Abstract: Regional investigation of the Passa Dois Group of the Parana Basin, excluded Irati Formation using outcrop and subsurface data indicates three principal depositional systems: (1) a high destructive tide dominated delta system designated Serra do Espigao Delta System; (2) the Corumbatai tidal flat System developed in the northeastern of Sao Paulo State: and (3) the Serra Alta epeineritic shelf System. The Serra do Espigao Delta System is te dominant element in the Santa Catarina and Parana States and comprises several deltas developed throughout the Upper Permian. Vertical sequence grades upward from Terezina prodelta muds through Serrinha delta front sands into fluvial sands and muds of the Morro Pelado delta plain. Such succession reflects regression and progradation of the system. Sediments were derived from South of Mato Grosso State carried by low gradient retilineous rivers. The deltas prograded from West to East over a shallow epicontinental sea opened at East in which was developed the muds of the extensive Serra Alta Shelf System. Prograding from north to south into the furthest end of the Serra Alta gulf a tidal flat was developed, behind of the Serra do Espigao deltas, supplied by longshore drift of sediments from the delta system. Principal features of the main depositional systems are shown in strike and dip stratigraphic sections and in isolith and distribution maps. These illustrate the relationship of the major systems and their constituent facies and also define the sedimentation geomorphic model of the Passa Dois Group.

Number of Ovarioles in Workers of Apis Mellifera Adansonii and Apis Mellifera Ligustica: A Comparative Study

Abstract: SummaryWorker pupae of Apis mellifera ligustica and A. m. adansonii (330 of each) were dissected, and their ovaries excised. For each race, the mean number of ovarioles in the right and left ovaries were significantly different; in both, the left ovary had more ovarioles than the right. Significant differences were found between races, and between samples of the same race, for number of ovarioles in the right (and in the left) ovary, and in both together. In all groupings, the mean numbers of ovarioles were significantly greater in A. m. ligustica than in A. m. adansonii.

Estudo da regulacao social em nannotrigona (scaptotrigona) postica latreille, em duas colonias (normal e com rainhas virgens), com especial referencia ao polietismo etario (hym, apidae, meliponinae)

Abstract: Foi estudada a divisao de trabalho entre as operarias de Nannotrigona (Scaptotrigona) postica em uma colonia normal (com rainha fisogastrica) e outra, com rainhas virgens. Os principais fatos observados foram: Do mesmo modo que ocorre em Apis, as atividades desempanhadas pelas operarias de S. postica se modificam de acordo com a idade e, tambem, com as necessidades da colonia. A sequencia de atividades e semelhante entre a colonia normal e aquela com rainhas virgens. A alteracao mais marcante e que existe uma antecipacao de algumas atividades das operarias na colonia com rainhas virgens. A substituicao da rainha fisogastrica foi observada mostrando alguns aspectos comportamentais interessantes. Provavelmente, a aceitacao da rainha em colonias de S. postica se de na fase em que a mesma encontra-se virgem. A longevidade media das operarias na colonia normal foi maior que na colonia contendo rainhas virgens.

A análise da densidade de drenagem e suas implicações geomorfológicas

Abstract: The drainage density and its geomorphic implications. The drainage density is concerned with the channel lenght per area unit. Expressing the interactions among environmental factors the drainage density is basis for the drainage basic classifications and for the morphoclimatic zone distinction.

Comportamento dos nucléolos e mitocôndrios durante a ovogênese de peixes teleósteos de àgua doce

Abstract: Resumo Os ovocitos de peixes teleosteos em fase pre-vitelogenica apresentam numerosos nucleolos localizados perifericamente no nucleo. Existem evidencias morfologicas da passagem do material destes nucleolos para o citoplasma onde se associa a mitocondrios e se dispersa, mantendo sempre a associacao. Este material pode ser detectado no ovocito mesmo apos o inicio da deposicao de vitelo possivelmente vindo a constituir o plasma germinativo.

Mortalidade de adultos de 15 a 74 anos de idade em São Paulo, Botucatu e São Manuel (Brasil), 1974/1975

Abstract: Universidade de Sao Paulo Faculdade de Saude Publica Departamento de Pratica de Saude Publica

Cell-Block Preparation for Cytodiagnosis of Pulmonary Paracoccidioidomycosis

Abstract: UNIV ESTADUAL PAULISTA JULIO MESQUITA FILHO,FAC MED BOTUCATU,DEPT PATOL,BOTACATU 18600,SP,BRAZIL

Controle de plantas daninhas em cana-de-açúcar (Saccharum officinarum) com hexazinone e suas misturas com diuron, em pré-emergência

Abstract: In the Agricultural year 1976/77, a field trial was performed on a sandy soil in "Usina Utinga Leao-Alagoas", where the following treatments were applied: hexazinone at 4 rates; hexazinone + diuron at 3 rates; diuron + 2,4 D (amine 720) and ametrine + 2,4 (amine 720), all in pre-emergence. Phytotoxity evaluation for sugar cane and control of Digitaria sanguinalis, Colopogonio sp, Paspalum distichum and Wedellia paludosa, were made 47, 78 and 111 days after the applications. The results obtained showed that the treatments with hexazinone (945 g/ha) and hexazinone (719 g/ha) + diuron (2048 g/ha) presented statistic differences relating to yield, when compared to check, besides being effective in the weeds control. No treatment caused any alterations on tecnologic qualities of the sugar cane.

A Phylogenetic Interpretation of Chromosomal and Electrophoretic Data in Columbiformes

Abstract: The present paper describes the karyotype and plasma esterase isozymes in 10 species and one hybrid of Columbiformes.The genus Columba showed the greatest enzymatic polymorphism but was uniform as to the diploid chromosome number. Esterase data showed a high affinity among Leptotila, Geotrygon and Columba. Among Claravis, Columbina and Scardafella no variability in the electrophoretic patterns was found but a high chromosomal diversification was observed.These data enabled us to propose some modifications in the previously proposed phylogenetic relationships.

Pesquisa de Trichinella spiralis em roedores capturados na zona portuária de Santos

Abstract: Examinaram-se 594 diafragmas de roedores capturados na zona portuaria de Santos tendo em vista a procura de larvas de Trichinella spiralis. Todos os diafragmas examinados estavam negativos.

Fractionation of the proteolytic and amylolytic complex enzyme-system of streptomyces-aureofaciens and some properties of fractions

Abstract: The Streptomyces aureofaciens extracellular proteolytic system was split into four fractions by carboxymethylcellulose (CMC) column chromatography giving three purely caseinolytic fractions and one fraction active toward both starch and casein. The first caseinolytic and amylolytic fraction was further fractionated by DEAE-Sephadex A-50 chromatography into one purely amylolytic fraction and another showing both activities, was refractioned into four new fractions by DEAE-cellulose chromatography. These fractions were found to be heterogeneous by polyacrylamide gel electrophoresis, three of them acted on both starch and casein and a fourth was only caseinolytic. The second CMC fraction was further purified by CMC rechromatography to an homogeneous fraction that hydrolyzes carboxypeptidase A(EC 3.4.2.1) synthetic substrates and solubilizes elastin. It had only one polypeptide chain with a molecular weight of about 28000 daltons, a high thermal stability in the presence of calcium ions, a pH optimum of about 6.8, and a maximal caseinolytic activity at about 50°C.

Holomorphically Significant Properties of Spaces of Holomorphic Germs

Abstract: Publisher Summary This chapter presents a study on holomorphically significant properties of spaces of holomorphic germs. The chapter presents several definitions and the main results. Let K be a compact set in a complex metrizable locally convex space X and Y a complex Banach space. The chapter is concerned with results furnishing information about the behavior of the space of holomorphic germs endowed with the Nachbin topology with relation to the following properties: “holomorphically bornological,” “holomorphically barelled,” “holomorphically infrabarelled,” “holomorphically Mackey,” “Monte1,” and “infra-Montel,” introduced in [N1], [N2], [M], [BMNl] and [BMN2]. The chapter uses the freely notations and terminology of [BMN2] and presents a brief review. The chapter introduces the polynomially significant properties, properties (D) and (D*) and hypoholomorphic and holomorphically semibornological spaces. The chapter presents that the holomorphically significant properties, can be expressed in terms of the polynomially significant properties and properties (D) and (D*). The chapter also introduces the definition of G-spaces that is a particular kind of locally convex spaces that embodies an extensive class of spaces of germs as and is presented with several examples.

Alguns efeitos do fluometuron sobre o crescimento inicial de Bidens pilosa L.

Abstract: Seeds of Bidens pilosa L (Compositae) were germinated in Petri dishes on filter paper wetted with aqueous suspensions of fluometuron at different concentrations (0, 5, 25, 125 and 625 ppm) The experiment was conducted during 7 days, under room conditions; the temperature range was 24°C - 28°C and the maximum light intensity was 600 lux Fluometuron reduced germination percentage, radicle and hypocotyl lenght, affected cotyledon shape and, at the higher concentrations, prevented the pericarp rejection The observed effects can not be attributed to biochemical lesions of the photosynthetic process

Problemas da explicaçao científica na Geografia

Abstract: Over the past ten or fifteen years, an increasing number of geographers have come to regard their discipline as a rigorous generalizing science of spatial relationships.