Internal Reproductive Organs
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Intrauterine sexual differentiation: biosyntesis and action of sexual steroid hormones
The objective of this review was to describe sexual differentiation events in mammals, relating them to biosynthesis of sexual steroid hormones and their mechanisms of action. Cholesterol is the precursor of sexual steroid hormone biosynthesis via action of several enzymes converting these hormones. Progestagens hormones serve as substrate for the production
Braz. arch. biol. technol.. Publicado em: 2015-06
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2. Internal reproductive organs of Cosmoclopius nigroannulatus (Hemiptera: Reduviidae)
Os órgãos internos de reprodução de machos e fêmeas de Cosmoclopius nigroannulatus são descritos, ilustrados e mensurados. Não se registrou diferença significativa entre machos imaturos e reprodutivos quanto ao tamanho das estruturas, sendo o aspecto destas similar em ambos. Já nas fêmeas, constataram-se diferenças notáveis tanto no aspecto quant
Publicado em: 2010
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3. Análise morfológica das espermátides e dos espermatozóides de Chrysomya megacephala (Fabricius) (Diptera: Calliphoridae) nos tratos reprodutores
Diptera constitutes one of the four largest orders of insects. The Oriental latrine-fly Chrysomya megacephala (Fabricius) belongs to the family Calliphoridae and is associated with medic, veterinary, sanitary and forensic issues. The aim of this research was to characterize the utrastructural aspects of the spermiogenesis and spermatozoa of the C. megacephal
Publicado em: 2008
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4. Desenvolvimento embrionário em ratas wistar prenhes submetidas ao ultra-som terapêutico de 3 MHz
Therapeutic ultrasound is widely used in different aesthetic treatment by young women, who can be irradiated during early gestation. Researches regarding the effects of therapeutic ultrasound on gestation present controversial results. Methodologies incompatible with clinical aspects are used and different methods and technics were employed. However none of
Publicado em: 2007
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5. The use of the polymerase chain reaction and restriction fragment length polymorphism technique associated with the classical morphology for characterization of Lymnaea columella, L. viatrix, and L. diaphana (Mollusca: Lymnaeidae)
The specific identification of Lymnaeid snails is based on a comparison of morphological characters of the shell, radula, renal and reproductive organs. However, the identification is complicated by dissection process, intra and interspecific similarity and variability of morphological characters. In the present study, polymerase chain reaction and restricti
Memórias do Instituto Oswaldo Cruz. Publicado em: 2004-08
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6. Survival of porcine reproductive and respiratory syndrome virus in houseflies
The objectives of the study were to determine the duration of porcine reproductive and respiratory syndrome virus (PRRSV) survival in houseflies (Musca domestica Linnaeus) following feeding on an infected pig, and to determine whether the virus was present on the exterior surface or within the internal viscera of the fly. A total of 210 laboratory-colonized
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7. Intraspecific variation in testis asymmetry in birds: evidence for naturally occurring compensation
In many taxa, the left and right testes often differ in size. The compensation hypothesis states that one testis of the pair serves as a ‘back-up’ for any reduced function in the other and provides a mechanism to explain intraspecific variation in degree and direction of gonad asymmetry. Although testis asymmetry is common in birds, evidence for natural
The Royal Society.
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8. Identification and PCR-Restriction Fragment Length Polymorphism Analysis of a Variant of the Ibaraki Virus from Naturally Infected Cattle and Aborted Fetuses in Japan
One hundred fourteen field isolates of the Ibaraki virus (IBAV), a member of the epizootic hemorrhagic disease virus serotype 2 (EHDV-2), were isolated from blood samples of affected and apparently healthy cattle and Culicoides biting midges and from blood samples of dams and internal organs of aborted fetuses during an outbreak of Ibaraki disease in the sou
American Society for Microbiology.
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9. Internal Spatiotemporal Population Dynamics of Infection with Three Wolbachia Strains in the Adzuki Bean Beetle, Callosobruchus chinensis (Coleoptera: Bruchidae)
The adzuki bean beetle, Callosobruchus chinensis, is infected with three distinct lineages of endosymbiotic bacteria belonging to the genus Wolbachia, which were designated wBruCon, wBruOri, and wBruAus. In an attempt to understand the mechanisms underlying the infection with these three organisms, the spatiotemporal infection dynamics of the three Wolbachia
American Society for Microbiology.