11 research outputs found
Effects of incubation temperature, inoculum size, and medium on agreement of macro- and microdilution broth susceptibility test results for yeasts
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Measurement of H zero excited states produced by foil stripping of 800-MeV H[sup [minus]] ions
Foil stripping of H[sup [minus]] directly to H[sup +] is being considered for proton injection in the next generation of high-current proton storage rings. This technique can result in significant losses because excited states of HO, which are also produced in the foil, are field stripped in the downstream bending magnets. Without due care in the injection system design, many of the resulting protons will be outside the acceptance of the storage ring and will be quickly lost. We measured the production of such H[sup 0] excited states at the LAMPF High Resolution Atomic Beam Facility. An 800-MeV H[sup [minus]] beam was passed through carbon foils of thicknesses 70, 100, 200, and 300 [mu]g/cm[sup 2], and the excited states were analyzed by a special magnet downstream of the foil. The magnet had a linear field gradient so that the trajectories of the outgoing protons could be used to reconstruct the field values at which the various H[sup 0] stripped. We found that about 1% of the H[sup 0] emerge in excited states which can be stripped to protons by ring-bending magnets
Tempo de uso em pastagens e volume dos macroporos do solo na AmazĂŽnia Central
Soil quality under usage through time, and within agroecosystems, is an important aspect in order to improve soil usage sustainability in tropical regions. In this scenario, quantifying the effects of time of usage in pastures under the different soil components (macropores) is important to determine the management planning and reclamation most adequate for such areas. The objective of this study was to evaluate the time effect in pastures (4, 5 and 8 years) on macropore volume after ten years of abandonment and nine of reclamation through Capoeira and agroecosystems. Macropore volume was measured in three different depths (0-5; 5-10 and 10-15 cm) in 100 cm3 steel cylinders. Macropore volume dropped significantly with the raise in time usage of the areas as pasture, which in turn makes time usage evident in pastures over macropore volume of soil ℠50Ό Όm, mainly in the first soil layer (0-5 cm), directly affected by animal impact. Therefore, it is suggested that time of soil reclamation should be longer than ten years so that the soil characteristics can be recovered