Results 241 to 250 of about 356,642 (291)

Impact of sperm fractionation on chromosome positioning, chromatin integrity, DNA methylation, and hydroxymethylation level. [PDF]

Cell Mol Biol Lett
Graczyk Z, Kostyk J, Pospieszna J, Myslicka Z, Kamieniczna M, Fraczek M, Olszewska M, Kurpisz M.   +7 more
europepmc   +1 more source

Morphotypes, preservation, and taphonomy of dinosaur footprints, tail traces, and swim tracks in the largest tracksite in the world: Carreras Pampa (Upper Cretaceous), Torotoro National Park, Bolivia. [PDF]

PLoS One
Esperante R, McLarty JA, Nick KE, Pompe LR, Biaggi RE, Medina HDB, Llempen NA, Silvestri ÁBL, Quispe LLM, Cano AJG, Saavedra WQ, Rodríguez GR.   +11 more
europepmc   +1 more source

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???Pumped-up propulsion??? during front crawl swimming

Medicine and Science in Sports and Exercise, 2002
It is currently held that propulsion in human front crawl swimming is achieved by lift and drag forces predominantly generated by the hands. Calculation of these propulsive forces relies on the quasi-steady assumption that the fluid dynamic behavior of a hand model in a flow channel (constant velocity and orientation) is similar to that of a hand of a ...
Toussaint, H.M., van den Berg, C., Beek, W.J.   +2 more
openaire   +3 more sources

Simultaneous swim-up/swim-down of sperm in assisted reproduction procedures

Journal of Assisted Reproduction and Genetics, 1993
High-quality motile human spermatozoa were obtained following treatment of semen by simultaneous swim-up into medium and swim-down into an isotonic 40% Percoll solution.This procedure was significantly better than the swim-up method and comparable to discontinuous Percoll gradient centrifugation. Recovery rates of motile sperm were 35% for swim-up, 65%
M, Almagor, D, Benbenishti, D, Rosenak, Y, Mogle, H, Yaffe   +4 more
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Factors affecting sperm yield during swim-up

Journal of Assisted Reproduction and Genetics, 1993
The migration of sperm (expressed as the percentage of the total motile cells in the ejaculate aliquot) from seminal plasma into overlying medium (swim-up) was increased with time, temperature, and increasing the surface area of contact between the two phases by increasing the angle of tube inclination.The proportion of sperm migrating into the medium ...
K, Purvis, I, Egdetveit
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Swim-up procedure selects spermatozoa with longer telomere length

Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis, 2010
Telomere length and sperm DNA fragmentation were determined in sperm samples from 27 patients, using a quantitative PCR (Q-PCR) assay and the Sperm Chromatin Dispersion (SCD) test, respectively. Comparisons of the samples before and after swim-up processing demonstrated that this procedure selects a sperm population with longer average telomere size ...
Rebeca, Santiso, María, Tamayo, Jaime, Gosálvez, Marcos, Meseguer, Nicolás, Garrido, José Luis, Fernández   +5 more
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Failure of multitube sperm swim-up for sex preselection

Fertility and Sterility, 1997
To use double-label fluorescence in situ hybridization to evaluate a modified swim-up procedure that is purported to be effective for preconceptual sex selection.Controlled, blinded study.University hospital laboratories.Donor males reporting for routine semen analysis.Percentages of X- and Y-bearing spermatozoa in neat semen and in two swim-up ...
De Jonge, Christopher J., Flaherty, Sean P., Barnes, Annette M., Swann, Nicholas J., Matthews, Colin D.   +4 more
openaire   +3 more sources

Swimming flume case report of stand-up paddle boarding

Medicina dello Sport, 2023
Tests performed in a swimming flume in laboratory, under carefully controlled conditions, can be indicative of actual stand-up paddle (SUP) performance on the water. Aim of the case report was to test the feasibility of testing the SUP performance in the swimming flume, as absolute values and as percentage of peak values assessed through a maximal ...
Demarie S., Galvani C., Salvati A., Marini C.   +3 more
openaire   +2 more sources

Evaluating Warm-Up Strategies for Elite Sprint Breaststroke Swimming Performance

International Journal of Sports Physiology and Performance, 2016
Purpose:Targeted passive heating and completion of dryland-based activation exercises within the warm-up can enhance sprint freestyle performance. The authors investigated if these interventions would also elicit improvements in sprint breaststroke swimming performance.Methods:Ten national and internationally competitive swimmers (~805 FINA (Fédération
Courtney J, McGowan, David B, Pyne, Kevin G, Thompson, Ben, Rattray   +3 more
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A comparison of swim-down and swim-up methods for the extraction of high motility sperm

Fertility and Sterility, 1991
High quality motile sperm are essential for the success of the in vitro fertilization-embryo transfer program and related procedures, for the performance of sperm antibody assays, and other in vitro tests of sperm function. Two methods for the extraction of high motility sperm, swim-down and swim-up, were compared on 30 ejaculates, and sperm motility ...
R M, Ing, D Q, Li, A M, Harding, W R, Jones   +3 more
openaire   +2 more sources