Results: 8

Morphology of the spermatheca of Triatoma lecticularia (Hemiptera: Reduviidae) (Stal, 1859)

Braz. j. biol; 79 (1), 2019
Abstract Triatoma lecticularia (Hemiptera: Reduviidae) (Stal, 1859) is a potential vector of Chagas's disease and the comprehension of its reproductive biology is an important tool to control this insect. In the reproductive tract of female insects, the spermatheca plays a crucial role storing male sperm...

The quantification of testicular cells during the postnatal development in two Caviomorph rodents: the guinea pig (Cavia porcellus) and the cutia (Dasyprocta agouti)

An. acad. bras. ciênc; 89 (3), 2017
ABSTRACT The germinative, Sertoli and Leydig cells of two caviomorph rodents (Cavia porcellus and Dasyprocta agouti) were counted as well as the estimation of the total volume of the testis and the total volume of seminiferous tubules and interstitium in prepubertal, pubertal and adult animals. The numbe...

Morfología espermática: comparación de las observaciones realizadas por 10 expertos
Sperm morphology: comparison of observations made by 10 experts

Introducción: La morfología espermática es uno de los parámetros más importantes que se evalúan durante el análisis seminal, aunque es un parámetro que presentan alta variabilidad inter-laboratorios. Por lo tanto el objetivo de este trabajo fue determinar la variación interindividuo al analizar ...

Recovery of sperm after epididymal refrigeration from domestic cats using ACP-117c and Tris extenders

We aimed to compare fresh sperm and sperm cooled to 4ºC that had been recovered from the epididymides of cats using powdered coconut water (ACP-117c) and Tris extenders. Sixty epididymides were divided into 6 groups: 10 fresh epididymides were recovered using Tris (T0h); 10 were kept at 4°C/2h and reco...

An easy, reproducible and cost-effective method for andrologists to improve the laboratory diagnosis of non-obstructive azoospermia: a novel microcentrifugation technique

Int. braz. j. urol; 42 (1), 2016
ABSTRACT This study describes a new method of microcentrifugation as an improved, viable, cost-effective option to the classical Cytospin apparatus to confirm azoospermia. Azoospermic semen samples were evaluated for cryptozoospermia by a centrifugation method similar to that of World Health Organization...

Estrés oxidativo: ¿un estado celular defectuoso para la función espermática?
Oxidative stress: a defective cell state for sperm function?

En los organismos vivos, las cantidades de radicales libres y especies reactivas del oxígeno (ROS) son controladas por un complejo sistema de homeostasis, capaz de mantener niveles fisiológicos de ROS necesarios para el funcionamiento y regulación de algunas biomoléculas. Paralelamente, los organismo...

Validación de sybr-14 y 6-cfda para evaluar la viabilidad e integridad de la membrana plasmática en espermatozoides caninos de raza chihuahua

Int. j. morphol; 32 (1), 2014
En la aplicación de técnicas reproductivas es importante determinar in vitro la capacidad fecundante de los espermatozoides, para ello se utilizan combinaciones de tinciones para evaluar los diferentes parámetros de función espermática, aumentando así la precisión de la estimación de la muestra. ...

Malathion Affects Spermatogenic Proliferation in Mouse

Int. j. morphol; 30 (4), 2012
The restriction of the mechanisms of cell proliferation in murine seminiferous epithelium, in terms of induction of programmed cell death until recently has not been fully analyzed. The aim of this work was to assess the effect of Malathion (MP) on testicular morphology and function in mouse spermatogene...