1. Thin sections of representative neurons from intramural, sympathetic and dorsal root ganglia, medulla oblongata, and cerebellar cortex were studied with the aid of the electron microscope. 2. The Nissl substance of these neurons consists of masses of endoplasmic reticulum showing various degrees of orientation; upon and between the cisternae, tubules, and vesicles of the reticulum lie cluste...

We study non-perturbative aspects of the Hagedorn transition for IIB string theory in an anti-de Sitter spacetime in the limit that the string length goes to infinity. The theory has a holographic dual in terms of free N = 4 super-Yang-Mills theory on a threedimensional sphere. We define a double scaling limit in which the width of the transition region around the Hagedorn temperature scales wi...

The fine structure of Bacillus subtilis has been studied by observing sections fixed in KMnO(4), OsO(4), or a combination of both. The majority of examinations were made in samples fixed in 2.0 per cent KMnO(4) in tap water. Samples were embedded in butyl methacrylate for sectioning. In general, KMnO(4) fixation appeared to provide much better definition of the boundaries of various structures ...

Irrational numbers can be assigned to physical entities based on iterative processes of geometric objects. It is likely that iterative round trips of vector signals include a geometric phase component. If so, this component will couple back to the round trip frequency or path length generating an non-linear feedback loop (i.e. induced by precession). In this paper such a quantum feedback mechan...

Much of the recent work on muscle fine structure has been discussed in a recent review by Bennett (1), who also covered the structure of various sarcoplasmic components and the sarcolemma. The present paper will be limited to myofibrillar fine structure. In the main, the current controversy in relation to muscle structure centers around two models, (a) what might be termed the "classical" model...

In a transverse section of the cornea, Descemet's membrane appears as a "glassy" layer between the stroma and the endothelium. I t has been identified as the basement membrane of the endothelium (1, 2), and is described as a strong, structureless membrane, very resistant to chemical agents and to pathological processes, several micra in thickness, and normally in a state of tension (3). During ...

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Annulate lamellae represent a poorly understood class of cytomembranes (see references 14-18). The structural resemblance and proximity (in some cases) between the nuclear envelope and annulate lamellae have led to the concept that the annulate lamellae represent a product of the nuclear envelope although the methods propoundedly involved in the morphogenesis of annulate lamellae are indeed var...

There is presently disagreement between theory and experiment as well as between different theoretical calculations concerning the fine-structure splitting of the lowest P state of the neutral helium atom. We believe that we have found a minor error in the formulas used by Drake et al. (Can. J. Phys. 80, 1195 (2002)) in their calculations, and we may have an explanation how the error has occurr...

In a transverse section of the cornea, Descemet's membrane appears as a "glassy" layer between the stroma and the endothelium. I t has been identified as the basement membrane of the endothelium (1, 2), and is described as a strong, structureless membrane, very resistant to chemical agents and to pathological processes, several micra in thickness, and normally in a state of tension (3). During ...