Results 61 to 70 of about 157,835 (298)

Tuning the Testicular Microenvironment for Enhancing Human Sertoli Cells Maturation and Functionality In Vitro

Advanced Healthcare Materials, EarlyView.
An in vitro testicular model is developed by generating connective tissue equivalents from human dermal fibroblast‐derived microtissues and coupling them with human Sertoli cells or human Sertoli cell spheroids. This engineered microenvironment supports Sertoli cell maturation and functionality, providing a promising platform for studying human ...
Annachiara Scalzone, Giorgia Imparato, Chiara Ausilio, Valentina Mollo, Paolo Antonio Netti   +4 more
wiley   +1 more source

Sperm death and dumping in Drosophila [PDF]

, 2004
Mating with more than one male is the norm for females of many species. In addition to generating competition between the ejaculates of different males, multiple mating may allow females to bias sperm use.
A Civetta, A Civetta, A Cordoba-Aguilar, AG Clark, AS Gilchrist, AS Gilchrist, B Jenzer, BI Arthur, CSP Price, D Scott, FM Hunter, GA Parker, GJ Lefevre, GT Miller, H Alonzo-Pimentel, HDM Moore, JK DeVries, L Xue, LG Harshman, LW Simmons, LW Simmons, M Otronen, MH Gromko, MH Gromko, MR Wheeler, S Pitnick, T Pizzari, TR Birkhead, WB Heed, WG Eberhard   +29 more
core   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Improving sperm banking efficiency in endangered species through the use of a sperm selection method in brown bear (Ursus arctos) thawed sperm

BMC Veterinary Research, 2017
Background Sperm selection methods such as Single Layer Centrifugation (SLC) have been demonstrated to be a useful tool to improve the quality of sperm samples and therefore to increase the efficiency of other artificial reproductive techniques in ...
L. Anel-Lopez, C. Ortega-Ferrusola, M. Álvarez, S. Borragán, C. Chamorro, F. J. Peña, J. Morrell, L. Anel, P. de Paz   +8 more
doaj   +1 more source

Unraveling the sperm bauplan: Relationships between sperm head morphology and sperm function in rodents [PDF]

, 2017
This is the author accepted manuscript. The final version is available from the Society for the Study of Reproduction via the DOI in this record.Rodents have spermatozoa with features not seen in other species. Sperm heads in many rodent species bear one
Bastir, M, Roldan, ERS, Tourmente, M, Varea-Sánchez, M   +3 more
core   +1 more source

Selection Bias in Occupational Sperm Studies [PDF]

American Journal of Epidemiology, 1998
Participation rates in sperm studies are typically 25-50%, and therefore it is a matter of concern whether the men who provide semen samples truly reflect the parent population. The authors analyzed data from three Danish occupational sperm studies and evaluated the relation between age and occurrence of subfertility to participation and provision of ...
S B, Larsen, A, Abell, J P, Bonde
openaire   +2 more sources

Multimodal Actuation and Environment Adaptive Strategies of Bio‐Inspired Micro/Nanorobots in Precision Medicine

Advanced Robotics Research, EarlyView.
An introduction for multidrive and environment‐adaptive micro/nanorobotics: design and fabrication strategies, intelligent actuation, and their applications. Various intelligent actuation approaches—magnetic, acoustic, optical, chemical, and biological—can be synergistically designed to enhance flexibility and adaptive behavior for precision medicine ...
Aiqing Ma, Han Gong, Jiacheng Ouyang, Liqi Chen, Tianfang Kang, Yiran He, Guojun Huang, Sidi Zheng, Ting Yin, Hong Pan, Lintao Cai   +10 more
wiley   +1 more source

Effect analysis of improving human sperm quality by a novel distance-temperature-combined selection approach [PDF]

Jichu yixue yu linchuang, 2020
Objective To investigate the effect of improving human sperm quality by novel selection approach based on progressive motility and thermotaxis. Methods The capacitated spermatozoa were placed on one end of strip droplets with different length (2, 5, 8
RAO Jin-peng, QIU Feng, CAI Yi-ting, WEI Kai, JIN Min, JIN Fan
doaj  

Paternity in mallards: effects of sperm quality and female sperm selection for inbreeding avoidance [PDF]

, 2017
Postcopulatory processes might play an important role in sexual selection. In theory, fertilization success could be controlled by females via selection of particular sperm within their reproductive tract, or it could be determined by sperm competition ...
Denk, Angelika G., Holzmann, Alois, Kempenaers, Bart, Peters, Anne, Vermeirssen, Etiënne L.M.   +4 more
core  

Negative phenotypic and genetic associations between copulation duration and longevity in male seed beetles [PDF]

, 2009
Reproduction can be costly and is predicted to trade-off against other characters. However, while these trade-offs are well documented for females, there has been less focus on aspects of male reproduction.
AA Hoffmann, B Zwaan, C Mühlhäuser, CW Fox, D Houle, D J Hosken, D Reznick, DA Dewsbury, DA Roff, DA Roff, DJ Hodgson, DJ Hosken, DJ Hosken, DS Falconer, E A Brown, FJ Messina, G Arnqvist, GA Schwarzenbach, GJ Kenagy, HS Crudgington, IT MacBean, J Hunt, J Hunt, JS Kotiaho, L Gay, L Partridge, LW Simmons, LW Simmons, M Ackermann, M Edvardsson, M Edvardsson, M Gasser, M Lynch, M Tatar, MD Tuttle, ME Czesak, MH Gromko, MJG Gage, MJG Gage, MR Rose, MT Siva-Jothy, N Wedell, NG Prasad, OY Martin, OY Martin, P E Eady, P Eady, PE Eady, R Thornhill, R Vasudev, S Paukku, S Pitnick, S Wigby, S-B Horng, T Burk, T Chapman, T Clutton-Brock, T Miyatake, T Price, T Tregenza, TA Mousseau, UM Savalli, UM Savalli, UM Savalli, WA Becker, WA Van Voorhies, WG Hill, WJ Bailey, WU Blanckenhorn, Y Qi   +69 more
core   +1 more source