Results 61 to 70 of about 1,568,056 (388)
Human sperm steer with second harmonics of the flagellar beat [PDF]
Nat. Commun. 8, 1415 (2017), 2017 Sperm are propelled by bending waves travelling along the flagellum. During steering in gradients of sensory cues, sperm adjust the flagellar beat waveform. Symmetric and asymmetric beat waveforms produce straight and curved swimming paths, respectively.
arxiv +1 more source
Use of endocrine and immune responses as predictors of bull sperm motility [PDF]
, 2015 Research has shown that peripheral blood cell populations change in response to an immune challenge, and hormone concentrations directly affect sperm characteristics.
Looper, Michael +3 more
core +2 more sources
Advanced Materials, EarlyView.This review highlights recent progress in piezoelectric materials for regenerative medicine, emphasizing their ability to convert mechanical stimuli into bioelectric signals that promote tissue repair. Key discussions cover the intrinsic piezoelectric properties of biological tissues, co‐stimulation cellular mechanisms for tissue regeneration, and ...
Xinyu Wang +3 more
wiley +1 more source
TOD-CNN: An Effective Convolutional Neural Network for Tiny Object Detection in Sperm Videos [PDF]
arXiv, 2022 The detection of tiny objects in microscopic videos is a problematic point, especially in large-scale experiments. For tiny objects (such as sperms) in microscopic videos, current detection methods face challenges in fuzzy, irregular, and precise positioning of objects.
arxiv
Human Reproduction, 2015 STUDY QUESTION Does the prewash total motile sperm count (TMSC) have a better predictive value for spontaneous ongoing pregnancy (SOP) than the World Health Organization (WHO) classification system?
J. A. M. Hamilton +7 more
semanticscholar +1 more source
Effects of cryopreservation on performance and fertilizing ability of sperm from Kerai (Puntius daruphani) [PDF]
, 2008 Puntius daruphani broodstocks bought from fishermen in Temerloh, Pahang, conditioned in the Hatchery Unit of Universiti Putra Malaysia were used for all the experiments. In this study fresh and cryopreserved sperm of P.
Emhemed, Mohamed M. M.
core
The Impact of DNA as a Chemical Admixture for Cementitious Materials
Advanced Materials Technologies, EarlyView.DNA molecules are added to cement pastes and their effects on rheology and hydration time are studied. DNA's chemical structure is composed of polysaccharide and phosphate groups, which are active functional groups in different commercial chemical admixtures: Viscosity modifiers and superplasticizers.
Alexander Mezhov +4 more
wiley +1 more source
Fertility & Reproduction, 2023 Background and Aims: Semen Analysis is the initial step in Assisted Reproduction Technology (ART) to help clinician decide the type of procedure such as Intra-Uterine Insemination (IUI), Intra-Cytoplasmic Sperm Injection (ICSI) or In-Vitro Fertilisation (
Su Xizn Lee, Fam May Chee, Sze Tian Tee
doaj +1 more source
Sperm Detection and Tracking in Phase-Contrast Microscopy Image Sequences using Deep Learning and Modified CSR-DCF [PDF]
arXiv, 2020 Nowadays, computer-aided sperm analysis (CASA) systems have made a big leap in extracting the characteristics of spermatozoa for studies or measuring human fertility. The first step in sperm characteristics analysis is sperm detection in the frames of the video sample. In this article, we used RetinaNet, a deep fully convolutional neural network as the
arxiv
Advanced Science, EarlyView.The genome of Megachile rotundata, an extensively managed solitary pollination bee species, has been sequenced, covering 280.68 Mb and predicting 10 701 genes. The study reveals significant expansions of the Toll gene family and their abundant expression in diapause prepupae, highlighting enhanced immune responses during diapause. This genome serves as
Rangjun Shi +8 more
wiley +1 more source