When cells of Dictyostelium discoideum are exposed to electric pulses they are induced to fuse, yielding motile polykaryotic cells. By combining electron microscopy and direct recording of fluorescent cells, we have studied the emergence of fusion pores in the membranes and the localization of actin to the cell cortex. In response to electric pulsing, the plasma membranes of two contiguous cell...

I. Introduction Over the next few years a large number of satellites designed to image the earth's surface will be launched. These satellites, quite commonly, will have a large range in spatial as well as spectral resolutions. The potential for users to become overwhelmed, not only by the quantity of data, but also by the problem of multiple pixel sizes is very real. Second, individual platform...

these investigations indicate that the anterior layer of the renal fascia continues across the midline of the body in front of the aorta and inferior vena cava to become continuous with a similar layer on the opposite side of the body. the posterior layer of the renal fascia blends with the fascia covering the psoas major especially at the medial and lateral edges of this muscle. but, in additi...

In This Issue In This Issue Ready…set…fuse he fusion of two lipid membranes underlies a huge range of biological phenomena, from infection by enveloped viruses to the secretion of cellular proteins , but a central aspect of membrane fusion has remained mysterious: do the T proteins that mediate fusion act cooperatively or independently? On page 833, Markovic et al. argue that teamwork is the or...

introduction: several supra spinal areas such as rostral ventrolateral medulla (rvlm) area are involved in basic cardiovascular regulation. the kolliker— fuse nucleus (kf) is located in pons and is heavily connected with rvlm. the cardiovascular effect of kf nucleus has been shown and it is suggested that kf is involved in sympathetic vasomotor tone and basic cardiovascular regulation. therefor...