Abstract The longitudinal extents of solar energetic ( E > 10 MeV) particle (SEP) events in the heliosphere are a characteristic important for understanding SEP acceleration and transport as well their space weather effects. detectors on STEREO A B spacecraft launched 2008, combined with those Earth-orbiting spacecraft, have enabled recent studies this many events. Each event distribution ha...

[structures: see text] The synthesis of novel 1',2'-aminomethylene bridged (6-aza-2-oxabicyclo[3.2.0]heptane) "azetidine" pyrimidine nucleosides and their transformations to the corresponding phosphoramidite building blocks (20, 39, and 42) for automated solid-phase oligonucleotide synthesis is reported. The novel bicyclonucleoside "azetidine" monomers were synthesized by two different strategi...

OBJECTIVE The preservation of Streptococcus pneumoniae by standard freezing methods for subsequent tests--such as serotyping and antibiotic susceptibility--is not possible or is difficult in many developing countries because of the high cost of equipment, inadequate equipment maintenance, and irregular power supply. We evaluated alternative low-cost methods, by comparing different culture media...

Abstract In this paper numerical simulations of the Earth’s magnetic field in south-eastern part an Najaf-Karbala Plateau and to north centre An-Najaf governorate have been investigated using WMM2015 model. The study area is located at (Latitude = 32.3180°-31.99°) N, (Longitude 44.5160°-44.0690°) E, ranging altitude between 20-90 m above sea level). was divided into grid (2000 points) by drawin...

Long-distance animal migrants often navigate in ways that imply an awareness of both latitude and longitude. Although several species are known to use magnetic cues as a surrogate for latitude, it is not known how any animal perceives longitude. Magnetic parameters appear to be unpromising as longitudinal markers because they typically vary more in a north-south rather than an east-west directi...