Containing Apatites." The general arrangement of the articles is similar to the format of a journal of dental research, but lacks editorial comment or discussion. Each paper is printed in the author's native language (English, German, or French) prefaced by very brief, inadequate abstracts in all three languages. Less than one-fifth of the studies pertains to fluorine and its cumulative effect ...

Patients with bacterial infection may show altered membrane permeability of the primary azurophilic lysosomes of blood neutrophils. A new enzyme cytochemical technique, sensitive to increased membrane permeability caused by contact of neutrophils with acetone, saponin, low pH, Streptolysin O, bacteria, and nylon wool, has been developed. The method is of potential value as a screening test for ...

The distribution of the Mg-dependent ATPase associated with a microsomal fraction of rabbit psoas muscle was studied histochemically and its localization in relation to the vesicles of the fraction and to the structure of intact fixed muscle was determined. Although enzyme activity was retained after fixation in hydroxyadipaldehyde and in glyoxal, it was lost after fixation in glutaraldehyde or...

Whenever it is our intention to study objects that are visible with the light-microscope, it is reasonable to start with the living cell, to study the effects of fixation on its visible constituents, to analyse their composition by cytochemical methods, and then to explore their fine structure by the use of the electron microscope. A manysided attack of this sort on a single kind of cell is muc...

The myeloperoxidase cytochemical reaction has been well established as a valuable tool in the characterisation of various types of leucocytes. This method helps in the distinction between acute myeloid leukaemias (AML) and acute lymphoblastic leukaemias (ALL) as suggested in the French, American, and British (FAB) classification (Bennett et al., 1976). The most common substrates used are benzid...

While some workers have studied cytochemical localizations during oogenesis in molluscs (e.g. Arvy, 1949, 1950; Bretschneider & Raven, 1951; Collier, 1960; Cowden, 1961; Pasteels & de Harven, 1963), others have examined the ultrastructure of the developing oocyte using the electron microscope (e.g. Rebhun, 1956a, b, 1961; Worley & Hershenov, 1960; Pasteels & de Harven, 1963). This work has been...