�ber die Zellen des braunen Fettgewebes und ihre Innervation

Morphological studies on brown adipose tissue in the bat and in humans of various ages.

“…Electron microscopic studies on this subject are quite inadequate, though they have been carried out by a number of authors (NAPOLITANO and FAWCETT, 1958;BARGMANN et al, 1968;UMAHARA, 1968;OCHI et al, 1969;SUTER, 1969b). A survey of our electron micrographs show not infrequent occurrences of unmyelinated fibers between brown fat cells, especially in association with blood capillaries (Fig.…”

“…26b). The occurrence of dense bodies resembling lysosomes has been described in the brown fat cells (BARGMANN et al, 1968;SUTER, 1969b;THOMSON et al, 1969). UMAHARA (1968) has classified dense bodies found frequently in the interscapular brown fat cells of the bat into two categories: round (spherical) dense bodies bounded by a distinct limiting membrane and irregularly shaped ones of variable sizes lacking the membrane.…”

“…The closely apposed plasma membranes of the nerve (presynaptic) and adipocyte (postsynaptic) are separated by a narrow synaptic cleft (Fig. 31), in which BARGMANN et al (1968) identified a basement membrane, while UMAHARA (1968) and Ocxi et al (1969) denied its occurrence. Usually no membrane thickening nor density increase are found in the pre-and postsynaptic membrane, although SUTER (1969b) showed an electron micrograph of rat brown fat suggesting a membrane specialization in the synaptic area.…”

“…Electron microscopic studies on the brown adipose tissue have been carried out mainly in the rat, mouse and newborn rabbit by many authors (see ITO, 1971); those in hibernators have been rare, there being the observation done by BARGMANN et al (1968) in the hedgehog and by UMAHARA (1968) in the bat. As mentioned above, UMAHARA (1968), a collaborator of the present authors, has electron microscopically observed five cases of interscapular brown fat taken from bats in April and October (Rhinolophus ferrum equinum nippon).…”

Light and Electron Microscopic Studies on the Brown Adipose Tissue in the Bat

“…They observed, however, in axoplasm besides small mitochondria only minute vesicles in varying number which they could hardly identify as synaptic vesicles. In the adrenergic nerve fibers or terminals found in the brown fat, so-called "small granular synaptic vesicles" are expected to be demonstrated by electron microscopy which are now widely accepted MANN et al (1968) BARGMANN et al (1968) who found that the nerve terminal and the brown fat cell were separated by a basement membrane.…”