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 ...

Catalytically graphitized electrospun carbon nanofibers adorned uniformly with fine nickel nanoparticles were successfully prepared. The procedure was based on the electrospinning technique and the use of nickel precursor to create both graphitized nanofibers and nickel nanoparticles under a relatively low-temperature heat treatment. The X-ray diffraction and Raman results clearly proved cataly...