I n our previous article about special-relativistic visualization,1 we described what the travelers from our highly developed civilization observed when they passed the Earth; now, they set out for the Cygnus X-1 binary system, which is roughly 6,000 light years away. The Cygnus X-1 system consists of a super giant variable star (HDE 226868) and a very compact object—presumably a black hole—wit...

The geochemistry of Ba, Ra, Th, and U and the potential of using Ra/Ba ratios as an alternative dating method are explored in modern and Holocene marine mollusc shells. Five modern shells of the Antarctic scallop Adamussium colbecki collected from the present day beach and six radiocarbon dated specimens from Holocene beach terraces of the Ross Sea region (Antarctic) between 700 and 6100 calibr...

OBJECTIVE To compare the clinical safety of the rapid infusion of infliximab (30-45 min) with the traditional one (2 h). PATIENTS AND METHOD Open, prospective study with the consecutive inclusion of 150 patients with rheumatoid arthritis (RA) and/or spondyloarthritis (AS), resistant to conventional treatment. Patients were randomly distributed to receive 1.5 or 3 mg/kg (according to medical c...

The meteorite Erg Chech (EC) 002 is the oldest felsic igneous rock from solar system analyzed to date and provides a unique opportunity study formation of crusts on differentiated protoplanets immediately after metal–silicate equilibration or core formation. extinct 53Mn-53Cr chronometer chronological constraints EC by applying isochron approach using chromite, metal–silicate–sulfide, whole-roc...

Astrophysical models of planet formation require accurate radiometric dating meteoritic components by short-lived (Al–Mg, Mn–Cr, Hf–W) and long-lived (Pb–Pb) chronometers, to develop a timeline such events in the solar nebula as Ca-rich, Al-rich Inclusions (CAIs), chondrules, planetesimals, etc. CAIs formed mostly around time (“t=0”) when radionuclide 26Al (t1/2=0.72 Myr) was present presumably...

study on the livestock diet is one of the main priorities in the management of rangeland in iran. so, this study was conducted to compare preference values of plant species in three age classes of kaboudeh sheep (one, three and five year old ones) in rangelands of bavanat, fars province, iran. for each age class, four sheep were selected and their grazing times from different plant species were...

Introduction: The hypoxic state, in which experimental animals were subjected to an atmosphere of 5% O2 and %95 N2, has been used to screen agents for possible cerebral protection by measuring their ability to prolong survival time in mice exposed to hypoxia. Researchers showed that rimonabant and AM251 allosteric potentiate all but the β1 subunit containing GABAA receptors at nM...