The sperm-activating and -attracting factor released from the eggs of the ascidians Ciona
intestinalis and Ciona savignyi requires extracellular Ca 2+ for activating sperm motility and …

BACKGROUND AND PURPOSE: Oxygen has a known paramagnetic effect and increases
CSF signal intensity on fluid-attenuated inversion recovery (FLAIR) MR images. The …

Observations of living Cernina fluctuata (Sowerby), the sole extant species of the Mesozoic
and Cenozoic prosobranch gastropod family Ampullospiridae, show that this species is an …

Chemotactic swimming behaviors of spermatozoa toward an egg have been reported in
various species. The strategies underlying these behaviors, however, are poorly understood. …

There are many causes of cervical lymphadenopathy, including infectious disease,
inflammatory or granulatory disease, autoimmune disease, and neoplasm. Imaging studies of …

Over the past decade, many skeletal matrix proteins that are possibly related to calcification
have been reported in various calcifying animals. Molluscs are among the most diverse …

Molluscan shells exhibit a wide variety of color tones and patterns that are thought to increase
fitness in different natural habitats. However, the chemical aspects of shell pigments have …

Despite being a member of the shelled mollusks (Conchiferans), most members of extant
cephalopods have lost their external biomineralized shells, except for the basally diverging …

Identification of tracemakers is of primary importance for evaluating the biotic interactions
inferred from bore holes in fossil shell assemblages. Domicile bore holes in the subapical …

There are many causes of cervical lymphadenopathy, including infectious disease,
inflammatory or granulatory disease, autoimmune disease, and neoplasm. Imaging studies of …