The micro structural morphological investigations of the laser exposed samples of Platinum are presented. Q-Switched Nd: YAG laser (1064 nm, 1.1 MW, 9 14 ns) represented by Gaussian profile, power density 3 × 10 15 Watt/m 2 and focal spot size 12 μm is used to irradiate the targets (4 N, 1 × 1 × 0.3 cm 3 ). Surface modifications are observed and examined for optimized 50 pulses in air (1 atm) a...

Polymer crystals are metastable and exhibit morphological changes when being annealed. To observe morphological changes on molecular scales we started from small nanometer-sized crystals of highly folded long-chain polymers. Micron-sized stripes consisting of monolayers or stacks of several layers of flat-on oriented polyethylene nanocrystals were generated via evaporative dewetting from an aqu...

In this paper, an ischemia detector is presented based on the analysis of QRS-derived angles. The detector has been developed by modeling ischemic effects on the QRS angles as a gradual change with a certain transition time and assuming a Laplacian additive modeling error contaminating the angle series. Both standard and non-standard leads were used for analysis. Non-standard leads were obtaine...

The mandate of quality health care includes improved neonatal survival, better maternal and neonatal health and an improved life expectancy, resulting in an increasingly older population with the largest growth in the 65+ age group. Therefore, there is a growing need for an improved awareness of age-related changes in the body in general and in the heart in particular. In addition to risk facto...

Morphological changes that take place in peat cultures of several species of rhizobia were examined. These changes seemed to be associated with enhanced survival of cells in peat and after inoculation onto plastic beads, which were used as a model system for seeds. Cell wall changes, in which the periplasmic space appeared to be occluded with electron-dense material, were observed in Rhizobium ...

Introduction. Advances in storage techniques of erythrocyte concentrates have contributed to develop significant erythrocyte morphologic abnormalities which have been associated with greater damage in the microcirculation, multiple organ dysfunction and increased morbidity and mortality. Objective. To evaluate the changes in erythrocyte morphology related to storage time. Material and methods. ...

Due to recent improvements of safety conditions for therapeutic devices, electrocautery is being considered with renewed interest in the field of therapeutic bronchoscopy. The efficiency of this technique for destructing intraluminal tumours is well documented and makes it an attractive alternative to Yttrium aluminium garnet (YAG) laser photo-coagulation. Little is known, however, about the mo...

Long-term potentiation (LTP) is a long-lasting form of synaptic plasticity induced by brief repetitive afferent stimulation that is thought to be associated with learning and memory. It is most commonly studied in the hippocampus where it may last for several weeks, and involves the synthesis of new proteins that might play a structural role. In this review we summarize the evidence in favor of...