Results 21 to 30 of about 4,134 (299)

Male refractory hypospadias with sexual reversal: a case report

Journal of Medical Case Reports, 2023
Abstract Background Hypospadias is one of the most prevalent urogenital malformations in clinic. However, some hypospadias may have a more complex disorder of sex development. Usually, hypospadias in these patients is severe. Among them, the 46,XX male sex reversal syndrome is a rare disorder of sex development, and this
Jianfeng Zhao, Gang Chen, Jun Chen, Le Qian   +3 more
openaire   +3 more sources

Adaptation to human populations is revealed by within-host polymorphisms in HIV-1 and hepatitis C virus [PDF]

, 2007
CD8(+) cytotoxic T-lymphocytes (CTLs) perform a critical role in the immune control of viral infections, including those caused by human immunodeficiency virus type 1 (HIV-1) and hepatitis C virus (HCV).
Leigh Brown Andrew J., Sergei L Kosakovsky Pond, Brown, Andrew J. Leigh, Douglas D Richman, Poon Art F. Y, Frost Simon D. W, Richman Douglas D, Poon, Art FY, Brown, Andrew J Leigh, Simon D W Frost, Leigh Brown, Andrew J., Frost, Simon D. W., Kosakovsky Pond Sergei L., Pond, Sergei L Kosakovsky, Art F Y Poon, Andrew J Leigh Brown, Richman, Douglas D., Richman, Douglas D, Pond, Sergei L. Kosakovsky, Frost, Simon DW, Bennett, Phil, Phil Bennett, Bennett Phil, Poon, Art F. Y.   +23 more
core   +1 more source

Sexual inactivity results in reversible reduction of LH bioavailability [PDF]

International Journal of Impotence Research, 2002
We have recently documented significantly reduced serum testosterone (T) levels in patients with erectile dysfunction (ED). To understand the mechanism of this hypotestosteronemia, which was independent of the etiology of ED, and its reversibility only in patients in whom a variety of nonhormonal therapies restored sexual activity, we measured serum ...
CAROSA E, BENVENGA, Salvatore, TRIMARCHI, Francesco, LENZI A, PEPE M, SIMONELLI C, JANNINI EA   +6 more
openaire   +6 more sources

Prevention of SIV rectal transmission and priming of T cell responses in macaques after local pre-exposure application of tenofovir gel [PDF]

, 2008
The rectum is particularly vulnerable to HIV transmission having only a single protective layer of columnar epithelium overlying tissue rich in activated lymphoid cells; thus, unprotected anal intercourse in both women and men carries a higher risk of ...
Peter Anton, Herrera, Carolina, Sally Sharpe, Anton, Peter, McGowan Ian, Kashuba Angela, Robin Shattock, Herrera Carolina, Rezk, N, Angela Kashuba, Herrera, C, Ian McGowan, Alethea Cope, Shattock Robin, Cope Alethea, McGowan, Ian, Shattock, R, Ham Claire, Cranage, M, Cope, A, Sharpe, Sally, Berry Neil, Heeney, J, Mike Dennis, Ham, C, Cranage Martin, Kashuba, A, McGowan, I, Claire Ham, Sharpe Sally, Heeney, Jonathan, Dennis, M, Berry, N, Kashuba, Angela, Anton Peter, Neil Berry, Cranage, Martin, Berry, Neil, Sharpe, S, Martin Cranage, Naser Rezk, Anton, P, Rezk, Naser, Dennis, Mike, Cope, Alethea, Ham, Claire, Rezk Naser, Heeney Jonathan, Carolina Herrera, Jonathan Heeney, Dennis Mike, Shattock, Robin   +51 more
core   +1 more source

Desempenho de três linhagens de tilápia submetidas ao tratamento com 17-α-metiltestosterona em condições ambientais não controladas Performance of three tilapia strains submitted to 17-α-methyltestosterone, under uncontrolled environmental conditions

Revista Brasileira de Zootecnia, 2009
Este estudo foi realizado para descrever o efeito da reversão sexual de linhagens de tilápia sobre as taxas de sobrevivência, o crescimento e o percentual de machos fenotípicos em condições ambientais variáveis.
Erika Neumann, Teresa Cristina Ribeiro Dias Koberstein, Francisco Manoel de Souza Braga   +2 more
doaj   +1 more source

Reversion Rate Estimates

, 2013
Best (filled diamonds) estimates of the reversion rate in each of the seven datasets. Best estimates are shown ±1 standard error. Escape and reversion may require additional compensatory mutations which will limit the occurrence of escape or reversion ...
Becca Asquith (61803), Charles T. T Edwards (61804), Angela R McLean (61805), Marc Lipsitch (14729)   +3 more
core   +1 more source

Rapid evolution of sex pheromone-producing enzyme expression in Drosophila. [PDF]

PLoS Biology, 2009
A wide range of organisms use sex pheromones to communicate with each other and to identify appropriate mating partners. While the evolution of chemical communication has been suggested to cause sexual isolation and speciation, the mechanisms that govern
Troy R Shirangi, Héloïse D Dufour, Thomas M Williams, Sean B Carroll   +3 more
doaj   +1 more source

Proporción Sexual y parámetros de producción de Oreochromis niloticus “Tilapia”

Manglar, 2023
El cultivo de Oreochromis niloticus se ve afectado por la reproducción excesiva en los sistemas de cultivo, lo que provoca un retraso en el crecimiento y tamaños pequeños en el momento de la cosecha, volviéndose no comercializables, creando la necesidad ...
Katicsa Natalie De La Cruz Barrueto, Kenyi Kaneshima Gonzalez, Miguel Ángel Ponciano Quezada, Zoila Gladis Culquichicón Malpica   +3 more
doaj   +1 more source

On sexual behavior and sex-role reversal

Journal of Psychosomatic Obstetrics & Gynecology, 2005
Sex is not about reproduction; sex is about (re-)combination of DNA. Sex, not reproduction, always involves physical contact between two individuals; to achieve this, strategies of sexual behavior evolved. Sexual behavior, therefore, did not evolve as part of a reproductive strategy, but evolved to enable exchange of genetic material.
openaire   +2 more sources

Growth stanza in fish life history using otoliths shape: the protandric Centropomus case (Carangaria: Centropomidae)

Neotropical Ichthyology, 2021
Morphoanatomical or physiological changes coupled with changes in body size are known as allometric relationships. The objective of this study was to identify the points of growth changes in Centropomus based on otolith morphometry and morphogeometry ...
Reginaldo Medeiros, Cicero D. Oliveira, Daniele Souto, Jordana Rangely, Nídia N. Fabré   +4 more
doaj   +1 more source