Results 51 to 60 of about 337,815 (176)

Fish Sperm Subpopulations Detection, Separation, and Application: Current State and Trends

open access: yesReviews in Aquaculture, Volume 18, Issue 4, September 2026.
Modern advances in sperm biology highlight the necessity of recognising intra‐ejaculate heterogeneity as a central concept for advancing both the fundamental understanding of fertilisation processes and the development of artificial reproduction techniques in fishes. ABSTRACT Sperm subpopulations represent a fundamental manifestation of intra‐ejaculate
Viktoriya Dzyuba   +2 more
wiley   +1 more source

A New 3D Multi-fluid Dust Model: A Study of the Effects of Activity and Nucleus Rotation on Dust Grain Behavior at Comet 67P/Churyumov–Gerasimenko [PDF]

open access: yes, 2017
Improving our capability to interpret observations of cometary dust is necessary to deepen our understanding of the role of dust in the formation of comets and in altering the cometary environments. Models including dust grains are in demand to interpret
Hansen, K.   +19 more
core   +2 more sources

SEPPCoN: Comet Dust and Activity at Moderate Heliocentric Distances as Observed with Spitzer

open access: yes, 2007
A Survey of Ensemble Physical Properties of Cometary Nuclei (SEPPCoN) is underway to characterize the nuclei of 100 Jupiter-family comets (JFC).
Kelley, Michael S.   +15 more
core   +2 more sources

Lunar Dayside Surface Potentials in the Terrestrial Magnetotail Inferred From Comparing Observed and Modeled Photoelectrons

open access: yesGeophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract As an airless body, the lunar surface is charged as a result of balancing electric currents into and away from the surface. Lunar surface charging is important for both scientific and human‐exploration purposes. The nightside surface charging has been well characterized by previous studies, but less so for the dayside.
Shaosui Xu   +3 more
wiley   +1 more source

Recent Advances in Ferrite‐Based Materials for Biomedical Applications: A Comprehensive Review

open access: yesAdvanced Materials, Volume 38, Issue 48, 26 August 2026.
Ferrite nanoplatforms are presented as tunable biomedical materials in which synthesis control, cation engineering, defect/morphology regulation, and surface functionalization govern structure–property–bioactivity relationships. These design strategies enable multifunctional applications including MRI contrast, magnetic hyperthermia, targeted drug ...
Pramod D. Mhase   +6 more
wiley   +1 more source

A Tale of Two Tails

open access: yes, 2009
This paper outlines the key difference between ion tails and dust tails. It explains why meteor showers are observed when the Earth passes close to the orbit of a comet by examining the distribution of fragments within the dust tail in term of their ...
Comyn-Platt, Edward   +2 more
core  

Progress in our understanding of cometary dust tails [PDF]

open access: yes, 1976
Various analytical techniques are employed to analyze observations on the character, composition, and size distribution of solid particles in cometary dust tails.
Sekanina, Z.
core  

The striated dust tail of Comet West 1976 VI as a particle fragmentation phenomenon

open access: yesThe Astronomical Journal, 1980
The motions of 16 striae in the dust tail of Comet West are studied. It is found that all 16 striae have originated from particle ejections, and that the particles responsible for the formation of a discrete striae must be emitted simultaneously, be subjected to the same repulsive acceleration in the tail, and break up simultaneously.
Z. Sekanina, J. A. Farrell
openaire   +1 more source

Industrial Hydrocarbons Exposure Deteriorates Sperm Integrity and Reproductive Function

open access: yesJournal of Biochemical and Molecular Toxicology, Volume 40, Issue 8, August 2026.
ABSTRACT Occupational exposure to polycyclic aromatic hydrocarbons (PAHs) or metal fumes in the workplace may be detrimental to male fertility. The present study compared sperm concentration, total motility, strict morphology and oxidative stress and SDF levels between 81 men, controls (n = 17) and workers from plastic industry workers (n = 18), steel ...
Madhan Kumar Pichandi   +2 more
wiley   +1 more source

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