Decalcification at the Mantle-Shell Interface in Molluscs

A comparative study of morphometry in shell-bearing molluscs

A comparative study was conducted on the ontogenetic variation in morphometry of a total of 29 shellbearing molluscan species occurring on an intertidal stony shore in south-western Japan. The relationships between shell size and total weight and between shell size and ̄esh weight were all highly signi®cant on logarithmic scales with the slopes having values of about three. The arcsine-transfor...

Refraction at the Interface of a Lossy Metamaterial

The refraction phenomenon at the interface of an ordinary material and a lossy metamaterial has been investigated. For oblique incidence on the lossy metamaterial, the planes of constant amplitude of the refracted wave are parallel to the interface and the plane of constant phases make a real angle with the interface (real refraction angle). The real refraction angle and hence, the real refract...

Studies on the Chemical Composition of Muscle Tissue. 3. the Mantle Muscle of Cephalopod Molluscs.

Enamel decalcification in primary schoolchildren.

To serve as a baseline for a future study of enamel decalcification in relation to orthodontic treatment, the pre­ valence and severity of decalcification was determined in 204 schoolchildren who had not received orthodontic treat­ ment (mean age 12.3 years), and who lived in a Jluroide deficient area. The severity of decalcification indicated by a Decalcification Index (DI) was calculated usin...

Molluscs

Figure 1. The ‘Kraken’ myth. Ancient tales repeatedly reported octopod-like sea-monsters attacking sea vessels. Indeed, octopuses may reach a maximum of 3 m body size, but the foundation of these ancient tales is based on giant squids (with ten rather than eight arms as depicted here) defending itself against its main predator, a sperm whale, rather than octopuses. Squids are known to leave suc...