Results: 424

Molecular cytogenetic analysis of a ring-Y infertile male patient

In the present study, we report on the case of a 43-year-old male patient seeking for fertility assistance, who showed a seminal analysis and testicular biopsy of complete azoospermia. Peripheral blood culture for chromosome studies revealed a karyotype of 46 chromosomes with a ring-Y-chromosome that los...
ADN

The use of the acridine orange test and the TUNEL assay to assess the integrity of freeze-dried bovine spermatozoa DNA

The ability to detect nuclear damage is an important tool for the development of sperm preservation methods. We used the acridine orange test (AOT) and the terminal deoxynucleotidyl transferase-mediated dUDP nick-end labeling (TUNEL) assay to assess the DNA status of sperm cells preserved with different ...
ADN, ADN

Temporal genetic differentiation in cultured and natural beds of the brown mussel Perna perna (Mytilidae)

Perna perna is the most important cultivated mussel of Santa Catarina, Brazil, sustaining an important economic input for many local families. Natural stocks of P. perna are depleted by the extraction of adults and seeds for consumption and culture. The aim of the present study was to use the microsatell...

Associations of DNA polymorphisms in growth hormone and its transcriptional regulators with growth and carcass traits in two populations of Brangus bulls

Sequence polymorphisms in the growth hormone (GH) gene and its transcriptional regulators, Pit-1 and Prop-1, were evaluated for associations with growth and carcass traits in two populations of Brangus bulls Chihuahuan Desert Rangeland Research Center (CDRRC, N = 248 from 14 sires) and a cooperating bree...
ADN

Micorrizas arbusculares del sur de la Amazonia colombiana y su relación con algunos factores fisicoquímicos y biológicos del suelo
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Acta amaz; 37 (3), 2007
La presencia de micorrizas arbusculares en la vegetación de la Amazonia mejora la nutrición de las plantas en suelos de baja fertilidad. Este trabajo evaluó la presencia natural de hongos micorrícicos de tipo arbuscular (HMA) en suelos ácidos de textura franco-arcillosa a arcillosa del sur de la Ama...

O Polimorfismo no códon 98 do gene de galectina-3 não está associado a tumores benignos e malignos de tiróide
Polymorphism on codon 98 of the galectin-3 gene are not associated to benign and nalignant thyroid tumors

Galectina-3 é uma proteína multifuncional altamente expressa em câncer de tiróide. O gene de galectina-3 (LGALS3) apresenta vários candidatos a SNPs anotados, no entanto a relação entre estes SNPs e variações fenotípicas específicas relevantes à saúde não foi avaliada. Neste estudo, investi...
ADN, ADN, ARN, ARN

Descripción de genotipos de Echinococcus granulosus obtenidos de especímenes de hidatidosis humana
Echinococcus granulosus genotypes in samples of human hydatidosis

Rev. chil. cir; 58 (6), 2006
Introducción: Se ha descrito variabilidad ambiental de Echinococcus granulosus (Eg). Se han reportado 10 genotipos y cierta heterogenicidad intergenotipo en estudios con material proveniente de animales. El objetivo de este estudio es describir los resultados de un protocolo de genotipificación de Eg e...
ADN

Influência do hipotireoidismo induzido por propiltiouracil na mucosa gengival do rato
Influence of propilthiouracil-induced hypothyroidism on rat gingival mucosa

O objetivo foi verificar a influência da deficiência dos hormônios tireoideanos induzida por propiltiouracil (PTU) na mucosa gengival do rato, analisando bioquimicamente as proteínas totais, colágeno (hidroxiprolina) e população celular (DNA). Foram utilizados 50 ratos machos da cepa Sprague-Dawle...
ADN