conclusions opium was not identified as a risk factor of ischemic stroke. a more extended survey considering further confounding factors is recommended. background one of the supposed risk factors of ischemic stroke is opium addiction, while the researches about its prevalence among patients with stroke are limited. objectives the aim of this study was comparing the prevalence of opium addictio...

Hormone release from nerve terminals in the neurohypophysis is a sensitive function of action potential frequency. We have investigated the cellular mechanisms responsible for this frequency-dependent facilitation by combining patch clamp and fluorimetric Ca2+ measurements in single neurosecretory terminals in thin slices of the rat posterior pituitary. In these terminals both action potential-...

objectivethis study was initiated to investigate the effect of portulaca oleraceae on morphine dependence in mice.materials and methodsdependence was induced using the subcutaneous injections of morphine for 3 days. on the day 4, morphineinjected 2 h prior to intraperitoneal injection of naloxone. the plant extracts ethanolic or aqueousadministered 0.5 h before the final dose of morphine. the n...

The gating properties of channels responsible for the generation of persistent Na(+) current (I(NaP)) in entorhinal cortex layer II principal neurons were investigated by performing cell-attached, patch-clamp experiments in acutely isolated cells. Voltage-gated Na(+)-channel activity was routinely elicited by applying 500-ms depolarizing test pulses positive to -60 mV from a holding potential o...

We investigate the extent and type of state dependence in labor market outcomes for young low-skilled Australians. Our model allows for three labor force states, employment, unemployment and out of the labor force, and for observed and unobserved heterogeneity.We find evidence of occurrence dependence, but no lagged duration dependence. A past employment spell increases the probability of emplo...

We present the results of a small study involving the use of keyword-filler hidden Markov models (HMM) for spotting keywords in continuous speech. The performance dependence on the amount of keyword training data and the choice of model parameters is documented. Also, we demonstrate a strong correlation between individual keyword spotting performance and median duration of that keyword. This de...

OBJECTIVE To investigate the clinical effects of regulating umbilical cord clamping in preterm infants. DESIGN A prospective randomised study. SETTING The Queen Mother's Hospital, Glasgow. SUBJECTS 36 vaginally delivered infants over 27 and under 33 weeks' gestation. INTERVENTION Holding the infant 20 cm below the introitus for 30 seconds before clamping the umbilical cord ("regulated" ...

Lithium containing droplet and cluster targets irradiated by laser pulses are proposed as prospective source of for soft x-ray lithography. Analytical model and simulations show that laser with repetition rate of several MHz with energy of several mJ and pulse duration 10 ps is required.

We show that according to the GRB internal shock model the pulse duration and the interval between neighboring pulses are correlated and have a similar distribution. We analyze a sample of bright long bursts and find that the pulses duration have a lognormal distribution while the intervals has an excess of long intervals (relative to lognormal distribution). This excess can be explained by the...