The steroid sulphatase of Patella vulgata

The steroid sulphatase of Patella vulgata.

The Histochemistry of the Radula of Patella vulgata

When first secreted the radula consists of chitin and protein. In the bases and cusps of the teeth the reactions for tyrosine, tryptophane, and chitin become negative, and are replaced by reactions for amino groups and argentaffin material. The bases of the teeth become impregnated with iron. Subsequently the reactions for amino groups and argentaffin material become negative in the cusps and t...

Recognising placental steroid sulphatase deficiency

bad, with variable results in between. Amputation of a digit is sometimes thought to produce a quicker return to work for the patient than replantation, but this is not borne out by published results."' The outlook in the leg is less clear. Functional results are often poor if a leg is replanted. Nevertheless, filleting may produce useful soft tissue which may be used as a vascularised free tra...

The Golgi Apparatus in Neurons and Epithelial Cells of the Common Limpet Patella Vulgata

1. In view of widely diverse views held about the identity and structure of the Golgi apparatus in neurons of Mollusca, particularly gastropods, a study has been made on neurons of the common limpet, Patella vulgata, both by light and electron microscopy. A report is given also of observations made on epithelial cells of Patella by electron microscopy. 2. As revealed by Kolatchev's method, the ...

Negative effects of sediment deposition on grazing activity and survival of the limpet Patella vulgata

Sediments are likely to influence the distribution of limpets and dominant sessile species on intertidal rocky shores by smothering and interfering with feeding activity. This hypothesis was tested by field observations and laboratory experiments in which the effects of different amounts and grain sizes of sediments on the grazing and survival of the limpet Patella vulgata L. were measured. On ...