A preliminary study on the rheological properties of human ejaculate and changes during liquefaction / 亚洲男科学杂志(英文版)
Asian Journal of Andrology
;
(6): 299-304, 2004.
Artigo
em Inglês
| WPRIM
| ID: wpr-270891
ABSTRACT
<p><b>AIM</b>To study the changes in rheological properties, namely the parameters of the hysteresis loops and yield stress versus time for human semen after ejaculation.</p><p><b>METHODS</b>Ejaculates were obtained from volunteers and immediately put into the test cup of a Brookfield Programmable DV-11 Rheometer, by which the hysteresis loops and yield stress were determined.</p><p><b>RESULTS</b>(1) Yield stress values dropped down from more than 3000 mPa to 60 mPa in about 5 minutes after ejaculation; (2) The shape of the hysteresis loops of shear stress versus shear rate was changed from the counter-clockwise direction, that enclosed a large area, into the clockwise direction, that enclosed a very small area.</p><p><b>CONCLUSION</b>Human ejaculate originally possesses semi-solid or visco-elastic body behavior and in 5 minutes after liquefaction, it becomes a thixotropic fluid or shearing thinning fluid with very low viscosity.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Fisiologia
/
Reologia
/
Sêmen
/
Motilidade dos Espermatozoides
/
Estresse Mecânico
/
Viscosidade
/
Técnicas In Vitro
/
Modelos Lineares
/
Elasticidade
Limite:
Adulto
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Asian Journal of Andrology
Ano de publicação:
2004
Tipo de documento:
Artigo
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