Base de dados : LILACS
Pesquisa : A11.284.187.520 [Categoria DeCS]
Referências encontradas : 4 [refinar]
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Texto completo SciELO Saúde Pública
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Id: lil-788102
Autor: Fuentes Flores, César; Sánchez Salinas, Omar.
Título: Contexto sociodemográfico de los homicidios en México D.F.: un análisis espacial / Sociodemographic context of homicide in Mexico City: a spatial analysis
Fonte: Rev. panam. salud pública = Pan am. j. public health;38(6):450-456, nov.-dic. 2015. ilus, tab.
Idioma: es.
Resumo: OBJETIVO:Investigar el patrón de distribución espacial de la tasa de homicidios y su relación con las características sociodemográficas en las delegaciones de Benito Juárez, Coyoacán y Cuauhtémoc de la Ciudad de México en el año 2010. MÉTODOS: Estudio inferencial de corte transversal que usa métodos de análisis espacial para estudiar la asociación espacial de la tasa de homicidios y las características demográficas. La asociación espacial fue determinada a través del cociente de localización, análisis de regresión múltiple y el uso de la regresión geográficamente ponderada. RESULTADOS: Los homicidios muestran un patrón de localización heterogéneo con altas tasas en zonas con uso del suelo no residencial, con baja densidad de población y baja marginación. CONCLUSIONES: El uso de herramientas de análisis espacial son instrumentos poderosos para el diseño de políticas de seguridad pública preventiva y recreativa que busquen reducir la mortalidad por causas externas como homicidios.

OBJECTIVE:Investigate the spatial distribution pattern of the homicide rate and its relation to sociodemographic features in the Benito Juárez, Coyoacán, and Cuauhtémoc districts of Mexico City in 2010. METHODS: Inferential cross-sectional study that uses spatial analysis methods to study the spatial association of the homicide rate and demographic features. Spatial association was determined through the location quotient, multiple regression analysis, and the use of geographically weighted regression. RESULTS: Homicides show a heterogeneous location pattern with high rates in areas with non-residential land use, low population density, and low marginalization. CONCLUSIONS: Spatial analysis tools are powerful instruments for the design of prevention- and recreation-focused public safety policies that aim to reduce mortality from external causes such as homicides.
Descritores: Hipóxia/metabolismo
Proteínas de Transporte de Cátions/metabolismo
Hipertensão Pulmonar/metabolismo
Músculo Liso Vascular/metabolismo
-Animais Congênicos
Hipóxia/genética
Arteríolas/metabolismo
Hipóxia Celular
Proliferação de Células
Células Cultivadas
Doença Crônica
Proteínas de Transporte de Cátions/deficiência
Proteínas de Transporte de Cátions/genética
Cromossomos de Mamíferos/genética
Técnicas de Silenciamento de Genes
Homeostase
Hipertensão Pulmonar/genética
Espaço Intracelular/metabolismo
Músculo Liso Vascular/citologia
Ratos Endogâmicos WKY
RATS, INBRED FAFFECT
Zinco/metabolismo
Limites: Animais
Bovinos
Feminino
Humanos
Masculino
Ratos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Texto completo SciELO Chile
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Id: lil-571988
Autor: Berríos, Soledad; Manterola, Marcia; Prieto, Zulita; López-Fenner, Julio; Page, Jesús; Fernández-Donoso, Raúl.
Título: Model of chromosome associations in Mus domesticus spermatocytes
Fonte: Biol. Res;43(3):275-285, 2010. ilus, graf, tab.
Idioma: en.
Projeto: FONDECYT; . Agencia Española de Cooperación Internacional para el Desarrollo (Spain).
Resumo: Understanding the spatial organization of the chromosomes in meiotic nuclei is crucial to our knowledge of the genome's functional regulation, stability and evolution. This study examined the nuclear architecture of Mus domesticus 2n=40 pachytene spermatocytes, analyzing the associations among autosomal bivalents via their Centromere Telomere Complexes (CTC). The study developed a nuclear model in which each CTC was represented as a 3D computer object. The probability of a given combination of associations among CTC was estimated by simulating a random distribution of 19 indistinguishable CTC over n indistinguishable "cells" on the nuclear envelope. The estimated association frequencies resulting from this numerical approach were similar to those obtained by quantifying actual associations in pachytene spermatocyte spreads. The nuclear localization and associations of CTC through the meiotic prophase in well-preserved nuclei were also analyzed. We concluded that throughout the meiotic prophase: 1) the CTC of autosomal bivalents are not randomly distributed in the nuclear space; 2) the CTC associate amongst themselves, probably at random, over a small surface of the nuclear envelope, at the beginning of the meiotic prophase; 3) the initial aggregation of centromere regions occurring in lepto-zygotene likely resolves into several smaller aggregates according to patterns of preferential partitioning; 4) these smaller aggregates spread over the inner face of the nuclear envelope, remaining stable until advanced stages of the meiotic prophase or even until the first meiotic division.
Descritores: Núcleo Celular/ultraestrutura
Cromossomos de Mamíferos/ultraestrutura
Espermatócitos/ultraestrutura
-Centrômero/ultraestrutura
Modelos Biológicos
Prófase Meiótica I/fisiologia
Membrana Nuclear/ultraestrutura
Telômero/ultraestrutura
Limites: Animais
Masculino
Camundongos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: CL1.1 - Biblioteca Central


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Id: lil-541109
Autor: Carvalho de Souza, P; Khayat, A. S; Seligmann, I. C; Rodríguez Burbano, R. M.
Título: Chromosome comparison between populations of the collared peccary, Tayassu tajacu, raised in captivity
Fonte: Biocell;32(2):207-210, Aug. 2008. tab.
Idioma: en.
Resumo: The collared peccary (Tayassu tajacu) is widely distributed over the American continent, being found from the south of the USA to the north of Argentina.In Brazil, it is spread all over the country, being one of the potential species to be raised in captivity. Therefore, the cytogenetic techniques could be a potencial tool for reproductive monitoring of animals raised in captivity, mainly when destined for commercial purposes. This study had the objective of determining the chromosome number of two populations raised in captivity and characterizing them by GTG banding. For this purpose, an analysis was made of mitotic metaphases obtained from lymphocyte cultures made from blood samples of 11 animals, six of which from the Northeast and five from the North of Brazil. The results of this analysis showed the same ka ryotype pattern for the species (2n=30 chromosomes and NF=48), besides corresponding to the South American pattern of the species, i.e., without a translocation between autosomes 1 and 8, chromosome X acrocentric, and no differences were found between the two populations studied. However, chromosomal polymorphisms were observed compared to data from the literature on populations from North and South America.
Descritores: Artiodáctilos/genética
Cromossomos de Mamíferos/genética
Cariotipagem
-Brasil
Cromossomo X
Cromossomo Y
Limites: Masculino
Animais
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: AR40.1 - Biblioteca de la Facultad de Ciencias Médicas de la UNCuyo


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Id: lil-462969
Autor: Olivera, Martha; Ruiz, Tatiana; Tarazona, Ariel; Giraldo, Carlos.
Título: El espermatozoide, desde la eyaculación hasta la fertilización / The sperm cell: from eyaculation to fertilization
Fonte: Rev. colomb. cienc. pecu;19(4):426-436, dic. 2006. ilus.
Idioma: es.
Resumo: En los últimos años se ha hecho un inmenso progreso en el entendimiento de los mecanismos moleculares involucrados en la maduración del gameto masculino y su tránsito desde la gónada hasta la fertilización del oocito. A lo largo de este trayecto el espermatozoide modifica su morfología y sus componentes moleculares especialmente, y además ocurren procesos que conducen a la activación para la entrada al oocito, para activar a su vez los mecanismos que conducen a la formación del zigoto. Este artículo presenta, a partir de la interpretación de la literatura actual un modelo de los eventos que se suceden a partir de la eyaculación hasta la fertilización, con énfasis en los mecanismos celulares y moleculares conocidos, y señala algunos vacíos de información aún existentes.
Descritores: Transtornos Cromossômicos
Cromossomos de Mamíferos
Ejaculação
Fertilização
Mamíferos
Reprodução/genética
Espermatogênese
Espermatozoides
Responsável: CO196.1 - Biblioteca Ciudadela Robledo



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