Calcium was detected by X-ray microanalysis in the mitochondria of electrically stimulated nerve endings. The phenomenon described here offers a simple means for identifying the stimulated nerve endings in the electron microscope and appears to be a promising new method for following spontaneous and drug-stimulated translocation of calcium in relation to the regulation of neurotransmitter release.

Yong Wang, Faxian Xiu, Jin Zou, Kang L. Wang, and Ajey P. Jacob Materials Engineering, The University of Queensland, Brisbane QLD 4072, Australia Department of Electrical Engineering, University of California at Los Angeles, California 90095, USA Centre for Microscopy and Microanalysis, The University of Queensland, Brisbane QLD 4072, Australia Technology and Manufacturing Group External Progra...

Electron transport in mesoscopic conductors has traditionally involved investigations of the mean current and the fluctuations of the current. A complementary view on charge transport is provided by the distribution of waiting times between charge carriers, but a proper theoretical framework for coherent electronic systems has so far been lacking. Here we develop a quantum theory of electron wa...

The contractile responses to barium and the ultrastructure and ionic composition of mitochondria were studied in vascular smooth muscle. In normal rabbit portal anterior mesenteric vein (PAMV) and main pulmonary artery (MPA) smooth muscle mitochondria were frequently associated with the surface vesicles. The average distance between the outer mitochondrial and inner surface vesicle membrane was...

The surface morphology and phase composition of the coatings obtained by magnetron sputtering Cu-MoS2 composite targets have been studied X-ray diffraction, scanning electron microscopy spectral microanalysis. diffraction studies show presence two crystalline phases, namely Cu with face-centered cubic lattice CuMo6S8 a rhombohedral lattice. Studies in Cu-CuMo6S8 revealed types structures. One s...