Results 41 to 50 of about 62,614 (258)

Is sperm morphology functionally related to sperm swimming ability? A case study in a wild passerine bird with male hierarchies

BMC Evolutionary Biology, 2018
Background Sexual selection continues after copulation via either sperm competition or cryptic female choice, and favors sperm traits that maximize sperm competitiveness.
Alfonso Rojas Mora, Magali Meniri, Sabrina Ciprietti, Fabrice Helfenstein   +3 more
doaj   +1 more source

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

Nonreciprocal Swarmalators With Reconfigurable and Controllable Formations for Robot Collectives

Advanced Robotics Research, EarlyView.
Nonreciprocal swarmalator interactions are enabled through control barrier functions to transform self‐organizing robot collectives into reconfigurable, constraint‐aware systems. Complex two‐ and three‐dimensional shapes, continuous morphing, obstacle‐aware navigation, collective splitting, and object transport emerge from modulating agent‐level ...
Kush Patel, Xinyue Xu, Wei Xiao, Steven Ceron   +3 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  

Cell‐Based Biohybrid Micro/Nanorobots for Biotherapy

Advanced Robotics Research, EarlyView.
This review systematically evaluates cell‐based biohybrid micro/nanorobots (CB‐BMRs), highlighting their cell selection criteria, fabrication strategies, and diverse actuation modes. Furthermore, it surveys the promising therapeutic applications of CB‐BMRs in targeted cancer, thrombosis, and inflammation treatments, while comprehensively discussing ...
Lin Wang, Chenlu Liu, Yu Zhao, Chuanhua Li, Xuyang Chen, Shixiao Ding, Lizhou Dai, Guokun Wang, Tianlong Li, Jiaxin Li, Xuejia Liu, Haocheng Wang   +11 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

Magnetically Actuated Microrobot for Drug Delivery: Current Progress and Challenges

Advanced Robotics Research, EarlyView.
Magnetically actuated microrobots are reshaping targeted drug delivery through wireless propulsion, programmable materials, and localized therapeutic release. This review examines how fabrication, body material selection, structural architecture, loading mechanisms, and imaging‐guided control converge to enable microrobotic therapies while identifying ...
Yang Yang, David J. Cappelleri
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

Pyrazole‐Derived Antibacterial Compounds Effectively Treat Methicillin‐Resistant Staphylococcus Aureus Infections by Inhibiting Aspartate Transcarbamoylase

Advanced Science, EarlyView.
This study unveils a novel antibacterial mechanism against MRSA, in which the compound Py‐27 selectively targets and inhibits aspartate transcarbamoylase (ATCase), a key enzyme in pyrimidine synthesis. This inhibition disrupts DNA replication, induces oxidative damage, leading to potent bactericidal activity.
Xiaorong Yang, Xinyuan Cao, Lixia Dai, Feng Yang, Jing Wang, Yudong Ma, Tong Bu, Zile Gong, Xueyan Liu, Changcai Bai, Xiaolou Miao, Xiaofei Shang   +11 more
wiley   +1 more source