In electron microscopic studies, protoplasmic anastomoses were found to occur between smooth muscle cells in the gastrointestinal tracts of rats. The protoplasmic connections are apparently cylindrical in form and contain cytoplasm having a density similar to that of the cellular regions connected. The membranes enclosing the cytoplasmic connections are continuous with the membranes of the conn...

When cultures of Brachyspira hyodysenteriae were grown under a wide range of in vitro conditions, at least 1% of the cells formed spherical bodies different to the normal helical form. This percentage increased considerably in aging cultures or following their incubation in caramelized media. Spherical body formation was initiated from a terminal localized swelling of the outer sheath followed ...

The distribution and rates of exchange of the ions sodium, potassium, and chloride in single internodal cells of the ecorticate characean, Nitellopsis obtusa, have been studied. In tracer experiments three kinetic compartments were found, the outermost "free space" of the cell, a compartment we have called "protoplasmic non-free space", and the cell sap. The concentrations in the vacuole were 5...

RITCHIE, A. E. (National Animal Disease Laboratory, Ames, Iowa), AND HERMAN C. ELLINGHAUSEN. Electron microscopy of leptospires. I. Anatomical features of Leptospira pomona. J. Bacteriol. 89:223-233. 1965.-Anatomical features of Leptospira pomona are described. Most cells in the logarithmic phase of growth, when examined in whole cell "negative-stained" preparations, display a homogeneous finel...

Based on their morphology, the most abundant cells within nervous tissue of central system, astrocytes, can be divided into two types, protoplasmic astrocytes and fibrous astrocytes. A further analysis brain with preserved from human principal olivary nucleus, based morphological differences age, is successfully performed in this paper. Moreover, images 294 148 146 protoplasmic, nucleus were us...

The Lattice Boltzmann Method is used to simulate the dynamics of droplet deformation in a channel flow under various conditions. The droplet behavior has been investigated under transient conditions. For cases where the droplet remains attached to the surface, the shape deformation of the droplet during crawling is captured. It has been shown that there is a limiting value for the droplet volum...

The potential difference across the protoplasm of impaled cells of two American species of Halicystis is compared. The mean value for H. Osterhoutii is 68.4 mv.; that for H. ovalis is 79.7 mv., the sea water being positive to the sap in both. The higher potential of H. ovalis is apparently due to the higher concentration of KCl (0.3 M) in its vacuolar sap. When the KCl content of H. Osterhoutii...