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137 results for “Spermatozoa”
Fig. 6 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 6. Optimization of reproductive modes and ultrastructural characters (characters 1 to 5) of the spermatozoa on a pruned phylogenetic hypothesis for Leptodactylidae (see section "Optimization" in Materials and Methods). See list of characters and bibliographic sources in Tables 1 and 3 Colors correspond to: gray, ambiguity; blue, state 0; red, state 1; green, state 2; orange, state 3; black, state 4.
Fig. 4 in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 4. Transmission electron microscopy of spermatozoa of species of the Leptodactylus melanonotus group. A: L. melanonotus. LS of the acrosomal vesicle and nuclei (n). Note the long and thick acrosomal vesicle (av) and the reduced sub-acrosomal space (ss). B: L. validus. TS showing acrosomal vesicle (ac) and nuclei (n) at different levels. Note the thickness of the acrosomal vesicle and of the acrosomal space. The conical shape of the nucleus is observed in the different cross-sections. C: L. podicipinus. LS of the acrosomal complex-nuclei (n), with the organelle-free cytoplasmic region (black arrowhead) present. D. L. wagneri. LS of the posterior region of the nucleus (n), showing the asymmetrical nuclear fossa (nf) and the transverse striations (ts). E: L.validus. LS of the posterior nuclear region. Note the symmetrical fossa with the proximal (pc) and distal (dc) centrioles. F: L. wagneri. TS of the axoneme (a) and paraxonemal rod (pr) separated from the mitochondrial collar (mc) by the cytoplasmic canal (cc). G-H: L. wagneri, L. melanonotus. TSs of the tail showing the axoneme (a) associated to the juxtaxonemal fiber (jf), and the axial fiber (af) attached to the other components of the tail by the undulating membrane (o). I: L. leptodactyloides. Terminal region of the tail where the axoneme (a) is the only element of the tail. Scales bars: C, D, H, I = 0.5 µm; A, E-G = 0.2 µm; B = 1 µm.
Fig. 1. A-B in Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny
Fig. 1. A-B: Schematic reconstruction of the morphology of the two types of spermatozoa observed in the genus Leptodactylus. Note that the main difference between the two morpho-types is the presence of the organelle-free cytoplasmic region between the acrosomal vesicle and the other end of the nucleus. Dashed lines indicate the cross-section represented on the right-hand side of the image.
Dataset of research about Potential of Purwoceng Extract (Pimpinella pruatjan Molkenb.) as Anti-Nicotine Therapy against Viability, Spermatozoa Membrane Integrity, and Organogenesis
<p>The dataset included:</p> <p>1. Ethical test certificate</p> <p>2. Description of ethical clearance</p> <p>3. List of figures of tools and goods used for this study</p> <p>4. Result of active ingredient purwoceng test certificates</p> <p>5. Results of Observation of Viability and Integrity of Spermatozoa Membranes appendices</p>
Effect of Sorting of Apoptotic Spermatozoa on the Outcome of Assisted Reproduction
ClinicalTrials.gov study NCT02166567. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Use of Testicular Spermatozoa in Non-azoospermic Patients
ClinicalTrials.gov study NCT05203211. IPD Sharing: NO. Countries: 1. Publications: 5.
Sex Selection of Human Spermatozoa
ClinicalTrials.gov study NCT05500573. IPD Sharing: NO. Countries: 1. Publications: 1.
Pilot Study on the Effects of FSH Treatment on the Epigenetic Characteristics of Spermatozoa in Infertile Patients With Severe Oligozoospermia
ClinicalTrials.gov study NCT02605070. IPD Sharing: Not stated. Countries: 1. Publications: 12.
Effect of Myoinositol Treatment of Spermatozoa on in Vitro Fertilization Outcome
ClinicalTrials.gov study NCT02050672. IPD Sharing: Not stated. Countries: 1. Publications: 3.
A Study Comparing a Shorter Exposure of Oocyte to Spermatozoa Versus a Standard Incubation on the Live Birth Rate of In-vitro Fertilization Treatment
ClinicalTrials.gov study NCT02534857. IPD Sharing: Not stated. Countries: 1. Publications: 12.
Aneuploidies in Embryos and Spermatozoa From Patients With Y-chromosome Microdeletions
ClinicalTrials.gov study NCT02527954. IPD Sharing: Not stated. Countries: 1. Publications: 27.
The Aim of This Study is to Determine the Incidence of Alterations in Fluorescent In Situ Hybridisation (FISH) of Spermatozoa and to Evaluate the Efficacy of the Use of Annexin Columns (MACS®) in Pati
ClinicalTrials.gov study NCT06524102. IPD Sharing: NO. Countries: 1. Publications: 0.
A phenotypic screening platform utilising human spermatozoa identifies compounds with contraceptive activity
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Spermatozoa Sperm Cell
Drawing uploaded to scidraw.io on: 22 May 2020
Spermatozoa Sperm Cell
Drawing uploaded to scidraw.io on: 22 May 2020
Figure 4 in Ultrastructure of spermatozoa and spermatogenesis in Octopus minor (Sasaki, 1920) (Cephalopoda: Octopoda)
Figure 4. Observation of tail of spermatozoon of Octopus minor under TEM. (A) Longitudinal section of the mitochondria and fibrous sheath at middle piece of tail; (B) transverse section of the mitochondria and fibrous sheath at middle piece of tail; (C) transverse section at principal piece; (D) longitudinal section at principal piece; (E) transverse section of the mitochondria sheath at middle piece of tail; (F–H) different transverse sections at principal piece; (I) transverse section at end piece of tail. CM: chondriosomal mantle; CF: coarse fibre; DT: digitiform tuber; FS: fibrous sheath; M: mitochondria; FSR: fibrous sheath remnant.
Figure 3 in Ultrastructure of spermatozoa and spermatogenesis in Octopus minor (Sasaki, 1920) (Cephalopoda: Octopoda)
Figure 3. Observation of head and neck of spermatozoon of Octopus minor under TEM. (A–B) Longitudinal section of spermatozoon at acrosome and anterior nucleus; (C–D) transverse section of acrosome; (E–G) longitudinal section of spermatozoon at nucleus, endonuclear channel and neck; (H) transverse section of spermatozoon at anterior nucleus; (I) transverse section of posterior nucleus. AV: acrosomal vesicle; AVL: acrosomal vesicle lacuna; PT: protuberance; SAL: sub-acrosomal lacuna; ST: striation; SM: skirt membrane; EC: endonuclear channel; CF: coarse fibre.
Figure 1 in Ultrastructure of spermatozoa and spermatogenesis in Octopus minor (Sasaki, 1920) (Cephalopoda: Octopoda)
Figure 1. Spermatophore and spermatozoa of Octopus minor under the light microscope. (A) Spermatophore; (B) sperm mass; (C) cement body; (D) ejaculatory apparatus; (E) the cap thread; (F) enlarged ejaculatory apparatus and cap thread structure; (G) region of connection of cement body and ejaculatory apparatus; (H) spermatozoon; (I) spermatozoa with entangled flagella.
Data from: Spermatozoa scattering by a microchannel feature: an elastohydrodynamic model
Sperm traverse their microenvironment through viscous fluid by propagating flagellar waves; the waveform emerges as a consequence of elastic structure, internal active moments and low Reynolds number fluid dynamics. Engineered microchannels have recently been proposed as a method of sorting and manipulating motile cells; the interaction of cells with these artificial environments therefore warrants investigation. A numerical method is presented for large-amplitude elastohydrodynamic interaction of active swimmers with domain features. This method is employed to examine hydrodynamic scattering by a model microchannel backstep feature. Scattering is shown to depend on backstep height and the relative strength of viscous and elastic forces in the flagellum. In a 'high viscosity' parameter regime corresponding to human sperm in cervical mucus analogue, this hydrodynamic contribution to scattering is comparable in magnitude to recent data on contact effects, being of the order of 5°–10°. Scattering can be positive or negative depending on the relative strength of viscous and elastic effects, emphasizing the importance of viscosity on the interaction of sperm with their microenvironment. The modulation of scattering angle by viscosity is associated with variations in flagellar asymmetry induced by the elastohydrodynamic interaction with the boundary feature.
Raw Data_Bioenergetics of human spermatozoa in patients with testicular germ cell tumour
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Allen Brain Atlas
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OpenNeuro
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