The biliary excretion and blood/plasma ratios of four novel 5-bromo-6-alkoxy- 5,6-dihydro prodrugs to S-ethyl-2'-deoxyuridine (EDU) including (-)-trans-(5S, 6S)-S-bromo-S-ethyl-6-methoxy-S, 6-dihydro-2'-deoxyuridine (BMEDU), (+ )-trans( SR, 6R)-S-bromo-S-ethyl-6-ethoxy-S, 6-deoxyuridine (BEEDU), (+ )-trans-(SR, 6R)-5-bromo-5-ethyl-6-ethoxy -S, 6-dihydro-S '-O-valeryl-2 ':.deoxyuridine (VBE...

The characteristics of near-fault ground motion are investigated considering heterogeneous slip distribution on the fault plane. Areas on the fault plane with large slip in compare with the average slip on the fault are known as asperity. The characteristics of strong ground motions in near-fault area are strongly affected by faulting parameters such as asperity location, maximum slip of asperi...

the existence of ra 226 is proved and measured by radiom emanation-method in waters and food products of north , north west and north – east of iran. a total of 126 water, 249 food and 22 air samples have been examined. the concertration of ra 226 in waters found to be 0.01 to 1.104 pci/1 and in food products from 0.01 to pci/gr. ash.the amount found in due ranges from 0.003 to 0.227 pci/m 3.it...

background: natural radioactivity in materials under certain conditions can reach the hazardous radiological levels. so, it becomes necessary to study the natural radioactivity in different materials to assess the dose for the population in order to know the health risks and to have a baseline for future changes in the environmental radioactivity due to human activities. materials and methods: ...

Fluid injection in deep geological formations usually induces microseismicity. In particular, industrial-scale injection of CO2 may induce a large number of microseismic events. Since CO2 is likely to reach the storage formation at a lower temperature than that corresponding to the geothermal gradient, both overpressure and cooling decrease the effective stresses and may induce microseismicity....

In order to assess the age relations between astra/novae (features with extensive radial fracture-graben systems) and their surroundings, and to determine the duration of their activity, we undertook a photogeologic analysis of Magellan images of 78 astra, 49 dark-parabola craters and 114 clear-halo craters. For seven of these 78 astra it was found that the astrum-forming faulting started befor...