Results 51 to 60 of about 65,346 (303)

Strong‐Magnetic Flexible Composites for Magnetically Responsive Soft Robots

Advanced Robotics Research, EarlyView.
This perspective provides an overview of the performance mechanisms, preparation methods, and applications of strong magnetic flexible composite materials in soft actuators (such as gripping, movement, and sensing), and further explores current opportunities and challenges.
Wenwen Li, Shuai Liu, Xinyi Wang, Xinglong Gong, Shouhu Xuan   +4 more
wiley   +1 more source

Efficiency of Sperm Gradient Processing and HA-binding Test for the Selection of Sperm with Normal Protamine, Intact DNA and Normal Morphology [PDF]

Cell Journal, 2008
Objective: The aim of this study was to examine the efficiency of HA-binding test and sperm gradient processing method for the selection of sperm with normal protamine,intact DNA and normal morphology.Materials and Methods: The study was conducted on 29 ...
MT. Taghadosi, M. Tavalaee, SH. Razavi, M. Mardani, MH. Nasr Esfahani   +4 more
doaj  

Sperm Adhesion Molecule 1 (SPAM1) Distribution in Selected Human Sperm by Hyaluronic Acid Test

Biomedicines, 2022
The failures of binding to the oocyte zona pellucida are commonly attributed to defects in the sperm recognition, adhesion, and fusion molecules. SPAM1 (sperm adhesion molecule 1) is a hyaluronidase implicated in the dispersion of the cumulus-oocyte ...
María José Gómez-Torres, Paula Sáez-Espinosa, Paula Manzano-Santiago, Laura Robles-Gómez, Natalia Huerta-Retamal, Jon Aizpurua   +5 more
doaj   +1 more source

Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection

, 2007
Engqvist L, Dekomien G, Lippmann T, Epplen JT, Sauer KP. Sperm transfer and paternity in the scorpionfly Panorpa cognata: large variance in traits favoured by postcopulatory episodes of sexual selection. Evolutionary Ecology.
Sauer, Klaus Peter, Epplen, Jörg T., Lippmann, Tania, Dekomien, Gabriele, Engqvist, Leif ; https://orcid.org/   +4 more
core   +1 more source

The evolution of male and female reproductive traits in simultaneously hermaphroditic terrestrial gastropods [PDF]

, 2007
Our understanding of postcopulatory sexual selection forcing reproductive trait evolution continues to be illuminated by comparative studies. Inter- as well as intraspecific comparisons offer the opportunity to study the long-lasting processes of ...
Beese, Kathleen
core   +1 more source

Paternal Circadian Disruption Impairs Offspring Cognition via Sperm microRNAs

Advanced Science, EarlyView.
Paternal circadian disruption remodels the sperm small RNA payload, elevating miR‐92a‐3p/miR‐25‐3p levels and perturbing early embryonic gene regulatory programs. Microinjection experiments and single‐embryo transcriptomics reveal sex‐specific developmental vulnerabilities, ultimately impairing offspring hippocampal synaptic plasticity and cognition ...
Kexin Zou, Sisi Luo, Binliang Tang, Zhiqiang Liu, Yuchuan Zhou, Yicong Meng, Zhengmu Wu, Zheng Sun, Weihui Shi, Jianzhong Sheng, Chuanjin Yu, Zhenhua Li, Siyi Wei, Mo Zhang, Yujie Luo, Jing Yan, Xueyun Qin, Jiahang Mo, Chengliang Zhou, Jinsong Li, Hefeng Huang, Yifu Ding, Guolian Ding   +22 more
wiley   +1 more source

Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen

Arquivo Brasileiro de Medicina Veterinária e Zootecnia
Frozen and thawed ovine semen undergo morphological and functional changes that prevent or decrease the efficiency of fertilization. Sperm selection methods seek to improve the quality and viability of the fertilizing materials.
T.G. Bergstein, L.C. Bicudo, L. Rodello, R.R. Weiss, S.D. Bicudo   +4 more
doaj   +1 more source

Practical Applications of Sperm Selection Techniques as a Tool for Improving Reproductive Efficiency

Veterinary Medicine International, 2011
Modern biotechnologies are used extensively in the animal breeding industry today. Therefore, it is essential that sperm handling procedures do not modulate the normal physiological mechanisms occurring in the female reproductive tract.
J. M. Morrell, H. Rodriguez-Martinez
doaj   +1 more source

Cryptic male choice: sperm allocation strategies when female quality varies

, 2002
Reinhold K, Kurtz J, Engqvist L. Cryptic male choice: sperm allocation strategies when female quality varies. Journal of Evolutionary Biology. 2002;15(2):201-209.We examined evolutionary stable sperm allocation and included stochastic variation in male ...
Reinhold, Klaus, Engqvist, Leif ; https://orcid.org/, Kurtz, Joachim   +2 more
core   +1 more source

Postcopulatory mechanisms of inbreeding avoidance in the island endemic hihi (Notiomystis cincta) [PDF]

, 2011
Avoiding genetic incompatibility resulting from inbreeding is thought to be one of the main drivers of mate choice, promiscuity, and sexual conflict. Inbreeding avoidance has been found across a wide range of taxa and is predicted to be adaptive when the
Ewen, J., Phillip Cassey, Bennett, P., Dawson, D., Brekke, Patricia, Patricia Brekke, Dawson, Deborah A., Gavin J. Horsburgh, Jinliang Wang, Wang, J., Wang, Jinliang, Horsburgh, Gavin J., Ewen, John G., Cassey, P., Brekke, P., Horsburgh, G., John G. Ewen, Cassey, Philip, Bennett, Peter M., Peter M. Bennett, Deborah A. Dawson   +20 more
core   +1 more source