منابع مشابه
Observations on the Annulate Lamellae of Immature Amphibian Oocytes
Electron microscopy has established the existence of a complex membranous-bound system of cavities, the endoplasmic reticulum, in the cytoplasm of numerous cells (1). By means of the same technique, what may be parts of another cytoplasmic organelle, the annulate lamellae (2), has also been discovered. These usually consist of a number of parallel, double-membraned sheets, each of which structu...
متن کاملElectron microscopic observations on immature chief and parietal cells in the mouse gastric mucosa.
Panoramic and conventional electron microscopic examinations were conducted on the mouse gastric mucosa with special reference to the distribution of immature forms of chief and parietal cells. Immature chief cells were occasionally present as high as the transitional region between the isthmus and neck of the gland, although their main localization was at the uppermost part of the base. Immatu...
متن کاملLuminous Phenomena of Earthquakes: Observations and Theories
Over the past few years, different theories (piezoelectric, positive holes, friction-vaporization, exo-electron emission, tribo- or fracture electrification) have been presented for the interpretation of earthquake lights. Although these theories can interpret earthquake luminous, each suffer from particular problems. There are also ambiguities and questions about the location of the light, the...
متن کاملUltrasonography of immature teratomas: 11 case reports
Background: Ovarian immature teratoma is a very rare type of tumor associated with a high relapse rate and mortality. Correspondingly, early diagnosis is important for effective treatment. The goal of this study was to retrospectively analyze the ultrasound characteristics of 11 cases of immature teratomas. Materials and Methods: Between January 2002 and December 2010, 11 patients were diagnose...
متن کاملInSAR observations of 2007 Tanzania rifting episode reveal mixed fault and dyke extension in an immature continental rift
S U M M A R Y In the early stages of continental rifting, extension takes place by normal faulting, while in mature continental rifts dyke intrusion dominates. Little is known about the nature of the transition between fault-controlled and dyke-controlled extension or about the processes in an intermediate setting. Here, we present observations of the temporal and spatial evolution of surface d...
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ژورنال
عنوان ژورنال: The Boston Medical and Surgical Journal
سال: 1868
ISSN: 0096-6762,1533-4406
DOI: 10.1056/nejm186806180782003