Chorion
Mostrando 1-12 de 121 artigos, teses e dissertações.
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1. Morphology of immatures of Euschistus (Mitripus) grandis (Insecta: Hemiptera: Pentatomidae)
Immatures are important sources of information about characters, thus potentially improving classification and phylogenies. Euschistus (Mitripus) grandis Rolston, 1978 occurs in southern and southeastern Brazil. There are no references in the literature about this species other than the original description and distribution records. Our aim is to describe th
Zoologia (Curitiba). Publicado em: 2013-06
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2. Determination of eye irritation potential of low-irritant products: comparison of in vitro results with the in vivo draize rabbit test
In an attempt to build the evaluation strategies to assess the human eye irritation, a reassessment of some in vitro tests is necessary, particularly concerning the non-irritants, mild and moderate irritants. Thus, the correlations between results obtained from the Draize test with the in vitro methods HET-CAM (Hens Egg Test-Chorion Allantonic Membrane) and
Brazilian Archives of Biology and Technology. Publicado em: 2012-06
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3. Desenvolvimento placentário em quatis: evolução filogenética em carnívoros? / Placental development in quati: phylogenetic evolution in carnivores?
The importance of preservation of brazilian wild species is based on knowledge of their distribution, behavior in the wild and in captivity, and the detailed description of their reproductive biology in order to perpetuate the specie. One of the main impacts of this study is the scientific details of the uterine environment versus the process of placentation
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
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4. Análisis morfológico de huevos de Triatoma barberi Usinger(Hemiptera: Reduviidae)
Triatoma barberi Usinger is a widely recognized vector of the protozoa Trypanosoma cruzi. The determination of its presence in the rural houses is made by direct observation of adults, nymphs, exuviae or eggs. For this reason, egg structural characteristics could facilitate the differentiation and identification of species that inhabit such environments. In
Neotropical Entomology. Publicado em: 2010-04
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5. Proteomic analisys of bovine yolk sac / Análise proteômica do saco vitelino de bovinos
The yolk sac plays an important role in embryonic development of all mammals. Its function is being studied, proving to be one of the initials of haematopoiesis. In the period when the placenta is not real yet formed during embryonic development, the yolk sac is the main source of nutrition of the embryo, providing a place for the transfer and synthesis of p
Publicado em: 2009
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6. Embryonic development of human lice: rearing conditions and susceptibility to spinosad
The embryonic development of human lice was evaluated according to the changes in the morphology of the embryo observed through the transparent chorion. Based on ocular and appendage development, three stages of embryogenesis were established: early, medium, and late. Influence of temperature and relative humidity (RH) on the laboratory rearing of Pediculus
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-05
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7. Comparative study of the VEGF system temporal distribution in the bovine and canine placenta / Estudo comparativo da distribuição temporal do sistema VEGF na placenta de cães e de bovinos
The VEGF family is known to be responsible for the angiogenesis increasing blood vessels number and permeability in the endometrial/placentary interface. A comparative study of VEGF system temporal distribution in canine and bovine placentas, which present very well described differences in structure and function, will contribute to better define the role of
Publicado em: 2006
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8. Morfologia comparada dos ovos e ninfas de Triatoma vandae Carcavallo, Jurberg, Rocha, Galvão, Noireau & Lent, 2002 e Triatoma williami Galvão, Souza & Lima, 1965 (Hemiptera, Reduviidae, Triatominae)
Eggs and all nymphs of these species were studied employing light microscopy (LM) and scanning electron microscopy (SEM). The major differences observed by LM in the eggs were related to the presence and the distribution of pores on the surface of their chorion. Morphological differences among three nymphal stages (1st, 3rd, and 5th) development of each spec
Memórias do Instituto Oswaldo Cruz. Publicado em: 2005-10
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9. Development placental in bovines obtained by natural gestation and by in vitro fertilization / Desenvolvimento placentário em bovinos obtidos por gestações naturais e por fecundação in vitro
The main goal of this study was to describe morphology and the early gestational development of 15 to 70 day-old bovine embryos obtained by natural mating and 35 day-old bovine embryos obtained by in vitro fertilization (IFV) technique. One hundred and forty-one concepts originated by natural mating and seven by IVF technique were used. All concepts were dis
Publicado em: 2005
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10. Morfologia, biologia e fototropismo de Batrachedra nuciferae Hodges (Lepidoptera: Coleophoridae). / Morphology, biology and phototropism of batrachedra nuciferae hodges (lepidoptera: coleophoridae).
The aim of this work was to describe the outer morphology of Batrachedra nuciferae Hodges (egg, larvae, pupae and adults), to determine the duration and viability of the egg, larval, prepupal, pupal and adult stages, number of instars, growth ratio, sex ratio, preoviposition and oviposition periods, and fecundity of the species reared in male coconut (Cocos
Publicado em: 2004
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11. Ootaxonomic investigation of five Lutzomyia species (Diptera, Psychodidae) from Venezuela
The eggshell fine structure of five sand fly species from Venezuela belonging to the genus Lutzomyia (L. migonei, L. ovallesi, L. absonodonta, L. gomezi and L. panamensis) was examined by scanning electron microscopy. The chorionic sculpturing of L. migonei, L. ovallesi, L. absonodonta and L. gomezi was characterized by series of columns arranged in palisade
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-02
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12. Mutants suppressing in trans chorion gene amplification in Drosophila.
Two recessive female-sterile mutants, K451 and K1214 , disrupt chorion formation by causing underproduction of all major chorion proteins. We present evidence that this effect is due to underaccumulation of the chorion mRNAs and that, in turn, this is caused by a substantial reduction in the level of chorion gene amplification. The mutants are X-linked but l