Computer Assisted Motility Analysis
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Contribution of the CASA system, based on open source software, to the assessment of sperm characteristics: informetric and usage-based approaches
ABSTRACT By using informetric tools, we evaluated the contribution and impact of the open source computer-assisted sperm analysis (CASA) software on sperm studies, especially pertaining to fish. The article was cited 125 times between 2007 and 2014 in four publication types (articles, doctoral dissertations, master’s theses, and books). Among articles, the
R. Bras. Zootec.. Publicado em: 2017-07
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2. Uso de análise multivariada para determinar a associação do desempenho reprodutivo de machos suinos com as caracteristicas seminais / Use of multivariate analyses to determine the association of boar fertility with semen traits
The application of new approaches that measure certain sperm motion characteristics and their association with boar fertility has shown a recent increase. Computer-assisted semen analysis (CASA) offers standardized assessment of multiple sperm motion parameters and it is plausible that the combination of these parameters with morphological sperm defects may
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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3. Cinética de espermatozoides criopreservados de bovinos após sexagem por citometria de fluxo.
Resumo ? O objetivo deste estudo foi comparar a cinética de sêmen bovino criopreservado não sexado, sexado X e sexado Y antes e depois da seleção espermática por gradiente de Percoll. Amostras criopreservadas de sêmen não sexado (grupo NS) e sexado X (grupo SX) e Y (grupo SY) por citometria de fluxo, de quatro touros, foram avaliadas quanto à motili
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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4. Avaliação das características da motilidade (CASA), morfologia e funcionalidade da membrana plasmática (HOST) de espermatozóides bovinos sexados por cimetria de fluxo / Assesment of Motility Chacarteristics (CASA), morphology; plasmatic membrane funcionality (HOST) in flow citometry sex sorted bovine sperm
Sex selecting has a huge impact in dairy and beef production. The only way commercially viable to obtain sex selecting nowadays, is a flow citometry sex sorted sperm technique. Currently sex sorted sperm have been used regularly in Artificial Insemination programs. Meanwhile, there are limitations about non return rate in farm conditions, superficially expla
Publicado em: 2010
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5. Effects of the overshadow availability at pasture on the reproductive characteristics in Nelore Bulls / Efeitos da disponibilidade de sombra na pastagem sobre as características reprodutivas de touros da raça Nelore
It is known that heat stress is the main cause that affects bulls reproductive performance, consequently leaded to testicular degeneration. This pathologic alteration can also occur in Bos Indicus cattle. The objective of this experiment was verify the shadow availability effect at pasture on reproductive characteristics in Nelore, a Bos Indicus bull. For th
Publicado em: 2009
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6. Efeito do laser diodo sobre as características de motilidade, de integridade das membranas plasmática e acrossomal e de potencial de membrana mitocondial de espermatozóides criopreservados de eqüinos / Effect of diode laser on motility, plasma and acrosomal membrane integrity, and mitochondrial membrane potential of cryopreserved stallion spermatozoa
Sperm motility depends on energy consumption. In some species sperm mitochondria play an important role in the production of energy for tail activity. Low-level laser irradiation increases this production as a modulation tool. The objective of this study was to analyze the effect of a continuous 650 nm wavelength diode laser irradiation, with dose 6 J/cm2 fo
Publicado em: 2008
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7. Motility and chemotaxis of Spirochaeta aurantia: computer-assisted motion analysis.
A computer program has been designed to study behavior in populations of Spirochaeta aurantia cells, and this program has been used to analyze changes in behavior in response to chemoattractants. Three kinds of behavior were distinguished: smooth swimming, flexing, and reversals in direction of swimming after a short pause (120 ms). Cell populations exposed
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8. Color-Sensitive Motility and Methanol Release Responses in Rhodobacter sphaeroides
Blue-light-induced repellent and demethylation responses, characteristic of behavioral adaptation, were observed in Rhodobacter sphaeroides. They were analyzed by computer-assisted motion analysis and through the release of volatile tritiated compounds from [methyl-3H]methionine-labeled cells, respectively. Increases in the stop frequency and the rate of met
American Society for Microbiology.
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9. Asthenozoospermia in Mice with Targeted Deletion of the Sperm Mitochondrion-Associated Cysteine-Rich Protein (Smcp) Gene
The sperm mitochondria-associated cysteine-rich protein (SMCP) is a cysteine- and proline-rich structural protein that is closely associated with the keratinous capsules of sperm mitochondria in the mitochondrial sheath surrounding the outer dense fibers and axoneme. To investigate the function of SMCP, we generated mice with a targeted disruption of the gen
American Society for Microbiology.
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10. Constitutively Active Protein Kinase A Disrupts Motility and Chemotaxis in Dictyostelium discoideum
The deletion of the gene for the regulatory subunit of protein kinase A (PKA) results in constitutively active PKA in the pkaR mutant. To investigate the role of PKA in the basic motile behavior and chemotaxis of Dictyostelium discoideum, pkaR mutant cells were subjected to computer-assisted two- and three-dimensional motion analysis. pkaR mutant cells crawl
American Society for Microbiology.
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11. RasC Plays a Role in Transduction of Temporal Gradient Information in the Cyclic-AMP Wave of Dictyostelium discoideum
To define the role that RasC plays in motility and chemotaxis, the behavior of a rasC null mutant, rasC−, in buffer and in response to the individual spatial, temporal, and concentration components of a natural cyclic AMP (cAMP) wave was analyzed by using computer-assisted two-dimensional and three-dimensional motion analysis systems. These quantitative st
American Society for Microbiology.