24 research outputs found
Selection of tomato plant families using characters related to water deficit resistance
Cosmic ray oriented performance studies for the JEM-EUSO first level trigger
JEM-EUSO is a space mission designed to investigate Ultra-High Energy Cosmic Rays and Neutrinos (E > 5 ⋅ 1019 eV) from the International Space Station (ISS). Looking down from above its wide angle telescope is able to observe their air showers and collect such data from a very wide area. Highly specific trigger algorithms are needed to drastically reduce the data load in the presence of both atmospheric and human activity related background light, yet retain the rare cosmic ray events recorded in the telescope. We report the performance in offline testing of the first level trigger algorithm on data from JEM-EUSO prototypes and laboratory measurements observing different light sources: data taken during a high altitude balloon flight over Canada, laser pulses observed from the ground traversing the real atmosphere, and model landscapes reproducing realistic aspect ratios and light conditions as would be seen from the ISS itself. The first level trigger logic successfully kept the trigger rate within the permissible bounds when challenged with artificially produced as well as naturally encountered night sky background fluctuations and while retaining events with general air-shower characteristics
Full Length Research Paper - Optimization of ISSR marker for African edible-seeded Cucurbitaceae species’ genetic diversity analysis
We applied a molecular approach using inter-simple sequence repeat
(ISSR) markers on three African edible-seeded cucurbits (Citrullus
lanatus L. Matsumura and Nakai, Cucumeropsis mannii
L. Naudin and Cucumis melo var. agrestis L. Naudin). To obtain
clear and reproducible bands on 1.5% agarose gels, we screened 21 ISSR
primers and three parameters (annealing temperature, gel tray, and
voltage and running time). The resolution of 11 ISSR markers was
performed, with optimal annealing temperature (Ta) varying from 50 to
52°C. The best combination to obtain clear and well-distinguished
band patterns was 1.5% agarose gel with a 20-lanes tray (6 mm width) at
80 V for 5 h. Applying the 11 ISSR primers on DNA extracted from an
accession of C. lanatus, 66 bands with 4 to 11 bands per primer was
observed