Animal Embryos
Mostrando 1-12 de 180 artigos, teses e dissertações.
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1. Challenges to increase the AI and ET markets in Brazil
Abstract Artificial insemination (AI) and embryo transfer (ET) are the most widely used biotechnologies in the world with the goal of increasing genetic gain and improving reproductive efficiency of beef and dairy herds. The protocols for ovulation synchronization for timed AI (TAI) or ET (TET) are tools that allow artificial insemination or transfer of a hi
Anim. Reprod.. Publicado em: 28/11/2019
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2. Oocytes, embryos and pluripotent stem cells from a biomedical perspective
Abstract The veterinary and animal science professions are rapidly developing and their inherent and historical connection to agriculture is challenged by more biomedical and medical directions of research. While some consider this development as a risk of losing identity, it may also be seen as an opportunity for developing further and more sophisticated co
Anim. Reprod.. Publicado em: 28/11/2019
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3. In vitro embryo production in buffaloes: from the laboratory to the farm
Abstract Transvaginal follicular aspiration technique together with in vitro embryo production are the biotechnological alternatives currently available to support genetic improvement breeding programs in buffalo species. However, aspects related to animal management, lack of knowledge of the metabolic needs and biochemical peculiarities of gametes and embry
Anim. Reprod.. Publicado em: 25/11/2019
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4. Assessing the association between hypoxia during craniofacial development and oral clefts
Abstract Objectives To evaluate the association between hypoxia during embryo development and oral clefts in an animal model, and to evaluate the association between polymorphisms in the HIF-1A gene with oral clefts in human families. Material and Methods The study with the animal model used zebrafish embryos at 8 hours post-fertilization submitted to 30%
J. Appl. Oral Sci.. Publicado em: 21/05/2018
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5. Cardio-respiratory development in bird embryos: new insights from a venerable animal model
ABSTRACT The avian embryo is a time-honored animal model for understanding vertebrate development. A key area of extensive study using bird embryos centers on developmental phenotypic plasticity of the cardio-respiratory system and how its normal development can be affected by abiotic factors such as temperature and oxygen availability. Through the investiga
R. Bras. Zootec.. Publicado em: 2016-11
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6. Gill dimensions in near-term embryos of Amazonian freshwater stingrays (Elasmobranchii: Potamotrygonidae) and their relationship to the lifestyle and habitat of neonatal pups
Este estudo realizado com embriões a termo de arraias de água doce (Potamotrygonidae) compara e analisa as dimensões branquiais em relação ao estilo de vida e habitat dos neonatos. Nos embriões de Paratrygon aiereba, Plesiotrygon iwamae, Potamotrygon motoro, Potamotrygon orbignyi e Potamotrygon sp. (arraia cururu) foram analisados número e comprimento
Neotrop. ichthyol.. Publicado em: 2015-03
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7. Assessing paternity in japanese quails (Coturnix japonica) using microsatellite markers - inferences for its mating system and reproductive success
Microsatellite markers were analyzed in Japanese quails, Coturnix japonica, using different methodologies (PAGE and automated genotyping), in order to evaluate their use in paternity testing. Ten animal triplets composed by a female and two males were used to mate and generate an offspring. Paternity was determined in five-day-old embryos, and the data gener
Rev. Bras. Cienc. Avic.. Publicado em: 2013-12
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8. Use of long-acting progesterone to acyclic embryo recipient mares
The objective of this study was to evaluate the efficiency of cyclic and acyclic progesterone-treated recipient mares in a commercial embryo transfer program. Acyclic recipients were treated with decreasing amounts of estradiol cypionate (ECP® - Pfizer Saúde Animal, São Paulo, Brazil), followed by 1500 mg of a sustained-release progesterone injection (P4L
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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9. Desenvolvimento de protocolo para criopreservação de folículos ovarianos de peixes usando vitrificação / Development of cryopreservation protocol for fish ovarian follicles using vitrification
Cryopreservation of fish embryos has been under investigation for over two decades; however every protocol tested so far has failed. The use of oocytes has more recently been reported as an alternative, nevertheless most of the studies were carried out using a single technique - controlled slow cooling - and success also remains elusive. Vitrification is an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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10. Produção in vitro de embriões na espécie ovina : efeito do benzoato de estradiol na aspiração folicular e transporte de gametas e embriões em longas distâncias
O objetivo do presente trabalho foi comparar o número de folículos, oócitos e a taxa de recuperação em ovelhas submetidas ao protocolo One Shot com e sem o uso do Benzoato de Estradiol; e com base nos resultados do primeiro experimento, utilizou-se o melhor protocolo hormonal para obtenção de oócitos e assim relatar a viabilidade do transporte de gam
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2011
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11. Protocolos hormonais de preparação de doadoras bovinas para produção de embriões in vitro / Different protocols to bovine donor preparation for in vitro embryo production
Efficiency of in vitro bovine embryo production has been affected by low quantity and quality of recovered oocytes from ultrasound-guided follicular aspiration (OPU). The objective of this study was to evaluate the effect of different synchronization of follicular wave protocols in the production of oocytes and embryos in vitro, of Bos taurus taurus and Bos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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12. Different protocols to bovine donor preparation for in vitro embryo production / Protocolos hormonais de preparação de doadoras bovinas para produção de embriões in vitro
Efficiency of in vitro bovine embryo production has been affected by low quantity and quality of recovered oocytes from ultrasound-guided follicular aspiration (OPU). The objective of this study was to evaluate the effect of different synchronization of follicular wave protocols in the production of oocytes and embryos in vitro, of Bos taurus taurus and Bos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011