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O progresso a vapor: navega??o e desenvolvimento na Amaz?nia do século XIX
Gregório, Vitor Marcos;
Nova Economia , 2009, DOI: 10.1590/S0103-63512009000100008
Abstract: the establishment of regular steamboat line in the amazon region was neither a quick nor a simple decision. it was the result of a long decision-making process that was created along with the start of the brazilian parliamentary life, in 1826. during its evolution, it underwent numerous advances and setbacks before the opening of the amazon river to all friendly countries definitively began to attract foreign capital for the activity, starting in 1867. this article examines this crucial process for the formation of the brazilian national state and the final incorporation of the amazon into the empire, recognizing that a fact of such importance could never be resolved in a few months only with the goodwill of some paraenses to remain united to the court of rio de janeiro.
Nomes dos vatonga de Inhambane: entre a ?tradi??o? e a ?modernidade?
Firmino,Gregório;
Etnográfica , 2008,
Abstract: the article deals with names of people among the vatonga, an ethnic group originally found in the bay of inhambane (mozambique) and surrounding areas, and it presents facts on their socio-cultural dimension and dynamic nature, as a consequence of multiple exogenous influence. as it addresses issues on anthroponyms used by the vatonga of inhambane, the article assumes that, despite a guiding pattern, the process of their construction is creative, heterogeneous and dynamic. historical contingencies affecting the social life of the tonga community dictated that various influences have an impact on the practice of name creation. as a consequence, there are clear signs of significant change in the course of time, due mainly to portuguese colonial presence and to the policy of assimilation. as a result portuguese influence is striking, being evident in the majority of the names used by those considering themselves to be vatonga.
Nomes dos vatonga de Inhambane: entre a “tradi o” e a “modernidade” Vatonga names in Inhambane: between “tradition” and “modernity”
Gregório Firmino
Etnográfica , 2008,
Abstract: O presente artigo debru a-se sobre os nomes de pessoas que se associam à comunidade tonga, um grupo étnico originalmente da regi o da Baía de Inhambane (Mo ambique) e zonas circunvizinhas, adiantando alguns subsídios relativos à sua dimens o sociocultural e ao seu carácter dinamico, como consequência da multiplicidade de influências de origem exógena. Ao tecer considera es à volta dos antropónimos usados entre os vatonga de Inhambane, assume que, apesar de apresentarem um padr o orientador, o processo da sua constru o é criativo, heterogéneo e dinamico. Contingências históricas que têm afectado a vida social da comunidade tonga ditam que influências variadas tenham tido impacto nas práticas de cria o de nomes, havendo, por isso, sinais evidentes de muta es significativas ao longo do tempo, principalmente em consequência da presen a colonial portuguesa e implanta o da política de assimila o. Assim, a influência portuguesa é marcante, sendo notória na maioria dos nomes usados pelos que se consideram vatonga. The article deals with names of people among the vatonga, an ethnic group originally found in the Bay of Inhambane (Mozambique) and surrounding areas, and it presents facts on their socio-cultural dimension and dynamic nature, as a consequence of multiple exogenous influence. As it addresses issues on anthroponyms used by the vatonga of Inhambane, the article assumes that, despite a guiding pattern, the process of their construction is creative, heterogeneous and dynamic. Historical contingencies affecting the social life of the tonga community dictated that various influences have an impact on the practice of name creation. As a consequence, there are clear signs of significant change in the course of time, due mainly to Portuguese colonial presence and to the policy of assimilation. As a result Portuguese influence is striking, being evident in the majority of the names used by those considering themselves to be vatonga.
On Stable Hypersurfaces with Vanishing Scalar Curvature
Gregório Silva Neto
Mathematics , 2013,
Abstract: We will prove that \emph{there are no stable complete hypersurfaces of $\mathbb{R}^4$ with zero scalar curvature, polynomial volume growth and such that $\dfrac{(-K)}{H^3}\geq c>0$ everywhere, for some constant $c>0$}, where $K$ denotes the Gauss-Kronecker curvature and $H$ denotes the mean curvature of the immersion. Our second result is the Bernstein type one \emph{there is no entire graphs of $\mathbb{R}^4$ with zero scalar curvature such that $\dfrac{(-K)}{H^3}\geq c>0$ everywhere}. At last, it will be proved that, if there exists a stable hypersurface with zero scalar curvature and $\dfrac{(-K)}{H^3}\geq c>0$ everywhere, that is, with volume growth greater than polynomial, then its tubular neighborhood is not embedded for suitable radius.
INFLUêNCIA DA EQUOTERAPIA NO CONTROLE CERVICAL E DE TRONCO EM UMA CRIAN A COM PARALISIA CEREBRAL
Alessanda Gregório,Eddy Krueger
Revista Uniandrade , 2013,
Abstract: A equoterapia é um método fisioterápico que se baseia na utiliza o do trote do cavalo como meio de tratamento em pacientes com sequelas sensoriais e motoras decorrentes de distúrbios neurológicos. Por tratar-se de um estudo de caso, o objetivo deste trabalho é avaliar a influência da equoterapia no controle cervical e de tronco em uma crian a com paralisia cerebral (PC). A crian a participante possui dois anos de idade e diagnóstico médico de tetraparesia espastica. Foram realizadas duas avalia es utilizando a escala de Gross Motor Function Measure (GMFM) antes e após todo o período das sess es de equoterapia. Esse método de avalia o consiste em 88 itens divididos em cinco dimens es: A, deitar e rolar; B, sentar; C, engatinhar e ajoelhar; D, em pé; e E, correndo e pulando. Utilizaram-se as dimens es A e B da escala GMFM no presente estudo. A equoterapia foi desenvolvida durante dez sess es de trinta minutos, utilizando montarias distintas. Observou-se que o controle cervical e o controle de tronco estavam presentes ao término do tratamento, que é comprovado com o aumento de 19,5% e 7,7% para as dimens es A e B da escala GMFM, respectivamente. A equoterapia apresentou grande eficiência no ganho do controle cervical e de tronco da crian a com PC.
Monotonicity formula for complete hypersurfaces in the Hyperbolic space and applications
Hilário Alencar,Gregório Silva Neto
Mathematics , 2015,
Abstract: In this paper we prove a monotonicity formula for the integral of the mean curvature for complete and proper hypersurfaces of the hyperbolic space and, as consequences, we obtain a lower bound for the integral of the mean curvature and that the integral of the mean curvature is infinity.
Poincaré and mean value inequalities for hypersurfaces in Riemannian manifolds and applications
Hilário Alencar,Gregório Silva Neto
Mathematics , 2015,
Abstract: In the first part of this paper we prove some new Poincar\'e inequalities, with explicit constants, for domains of any hypersurfaces of Riemannian manifolds with sectional curvature bounded from above, involving the first and the second symmetric functions of the eigenvalues of the second fundamental form of such hypersurfaces. We apply these inequalities to derive some isoperimetric inequalities and to estimate the volume of domains enclosed by compact self-shrinkers in terms of its scalar curvature. In the second part of the paper we prove some mean value inequalities and as consequences we derive some monotonicity results involving the integral of the mean curvature.
Morphological aspects of cluster formation in the germarium of the sugarcane borer Diatraea saccharalis Fabricius (Lepidoptera: Pyralidae)
Santos, Daniela C.;Gregório, Elisa A.;
Neotropical Entomology , 2006, DOI: 10.1590/S1519-566X2006000500012
Abstract: diatraea saccharalis f. is one of the greatest pests of the sugar cane culture. this report aimed to characterize the germarium region of the sugarcane borer by light and transmission electron microscopy, emphasizing the morphological steps of the ovarian cluster formation. in the germarium of this insect, four zones could be morphologically identified during the cluster formation. in the most apical end of each ovariole - zone i - the germ line stem cells undergo complete mitotic division, originating the cystoblasts. in the zone ii, each cystoblast produces a group of eight cells, the cystocytes, which are interconnected by the ring canals. clusters containing all the cystocytes in the meiosis, characterizes the zone iii. germ cells with ultrastructural features of apoptosis are also detected in this zone. in the zone iv the cystocytes differentiate, morphologically, into one oocyte and seven nurse cells. interstitial somatic cells and pre-follicle cells exhibit, in their cytoplasm, heterogeneous vacuoles containing degenerated cellular fragments, characterized as apoptotic bodies. our results pointed out to the morphological evidences related with important control mechanisms for new clusters/follicles production and for the cellular arrangement into the germarium, resulting from the programmed cell death. we believe that the morphological characterization of ovarian cluster formation in d. saccharalis provided valuable information for the understanding of the initial steps of oogenesis and contributed for the knowledge of the cellular mechanisms related with the oocyte production and with reproduction in insects.
The distribution of agglutinins and lytic activity against Trypanosoma rangeli and erythrocytes in Rhodnius prolixus and Triatoma infestans tissue extracts and haemolymph
Gregório, Elisa A.;Ratcliffe, Norman A.;
Memórias do Instituto Oswaldo Cruz , 1991, DOI: 10.1590/S0074-02761991000200007
Abstract: haemolymph, heads, salivary glands, crops, midguts, hindguts, and malpighian tubules from rhodnius prolixus and triatoma infestans were extracted in phosphate or tris buffer saline with calcium, and tested for agglutination and lytic activities by microtitration against both vertebrateerythrocytes and cultured epimatigote forms of trypanosoma rangeli. haemagglutination activity against rabbit erythrocytes was found in the crop, midgut and hindgut extracts of t. infestans but only in the haemolymph of r. prolixus. higher titres of parasite agglutinins were found in r. prolixus haemolymph than t. infestans, whilst the converse occurred for the tissue extracts. in addition, the extracts of t. infestans salivary glands, but not those of r. prolixus, showed a trypanolytic activity that was heat-inactivated and was not abolished by pre-incubation with any of the sugars or glycoproteins tested. t. infestans, which is refractory to infection by t. rangeli, thus appears to contain a much wider distribution of agglutinating and trypanolytic factors in its tissues than the more susceptible species, r. prolixus
Ultrastructure of the Lyonet's glands in larvae of Diatraea saccharalis Fabricius (Lepidoptera: Pyralidae)
Victoriano,Eliane; Gregório,Elisa A.;
Biocell , 2004,
Abstract: the lyonet's gland is found in lepidoptera larvae, close to the excretory duct of the silk gland. the role played by this gland is still uncertain. this work aims to describe the ultrastructure of the lyonet's gland in diatraea saccharalis larvae, offering suggestions regarding its possible function. the insects were reared under laboratory-controlled conditions. the glands were conventionally prepared for transmission (tem) and scanning (sem) electron microscopy. sem showed that lyonet's glands are paired small structures located in the ventral side of the head. they are composed by clustered long cells resembling leaves. under tem observations, each cell is surrounded by a thin basal lamina and contains large stellate nucleus. the cytoplasm presents large and empty canaliculi with small microvilli. the basal plasma membrane forms numerous infoldings where numerous and well-developed mitochondria are concentrated. the cytoplasmic membrane system is poorly developed. our ultrastructural results suggest that the lyonet's gland in d. saccharalis larvae may be involved in the uptake of small molecules from the hemolymph; no morphological evidences of macromolecules synthesis and secretion were noticed. the detection of nerve fibers in the gland suggest a neural control for the glandular cell function.
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