Vitaminspeicherung im Organismus

HISTOCHEMICAL AND MICROCHEMICAL OBSERVATIONS ON THE LIPIDS OF THE INTERSCAPULAR BROWN FAT OF THE FEMALE VESPERTILIONID BAT MYOTIS LUCIFUGUS LUCIFUGUS

“…Thus the findings of Vignes only vaguely suggest the presence of a phospholipid in brown fat, and a great deal more evidence is needed t o prove that such a lecithin is present in brown adipose tissue. T h e s a m e remarks hold true for Engelmann's observations (cited in Salmon, 1910) and Tonutti's (1936) on the occurrence of phospholipids in brown f a t cells.…”

“…While only t r a c e s of phospholipids have been noted i n t h e brown f a t of hedgehogs (Carlier and Evans, 1904) and r a t s (ClCment, 1947a), various workers found t h a t t h e brown fat of r a t s and mice i s especially rich in "lipoids" (Cramer, 1920), " a lecithin" (Engelmann, cited in Salmon, 1910, p. 89) or "jecorin, a substance c l o s e l y related t o t h e lecithins" (Bhchamp, cited i n Vignes, 1913a). More recently, Tonutti (1936) h a s observed t h a t t h e fatty residues from t h e brown fat of mice is rich i n phospholipids, and F a w c e t t (1952) h a s demonstrated, by histochemical means, that t h e brown f a t of r a t s appears richer in phospholipids and a c e t a l phospholipids than t h e white fat of rats.…”

“…In addition to the changes in the thermoregulatory mechanisms, various other physiological changes have been studied in hibernating mammals. The literature on hibernation is very extensive, and reference will b e made here only to especially valuable reviews on that subject (Kasmussen, 1916;Johnson, 1931;Ferdmann and Feinschmidt, 1932;Uiberall, 1934;Polimanti, 1912 and1936;Benedict and Lee, 1938;Emme, 1946;Kayser, 194Oc, and 1950). Additional references on various aspects of hibernation may be found in the extensive bibliographies published in these reviews.…”