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The results are reported of an investigation carried out from 1988 to 1990 in many houses in various sites in Lombardy and Piedmont. Measurements were actually carried out in Valtellina, in Angera--on the Lombard side of lake Maggiore--and in the high valley of the river Cervo, north of Biella. The patterns of radon immission in houses due to buildings(More)
Although common bean (Phaseolus vulgaris L.) has good potential for N2 fixation, some additional N provided through fertilizer usually is required for a maximum yield. In this study the suppressive effect of N on nodulation and N2 fixation was evaluated in an unfertile soil under greenhouse conditions with different levels of soil fertility (low=no P, K and(More)
Common bean (Phaseolus vulgaris L.) is able to fix 20–60 kg N ha−1 under tropical environments in Brazil, but these amounts are inadequate to meet the N requirement for economically attractive seed yields. When the plant is supplemented with N fertilizer, N2 fixation by Rhizobium can be suppressed even at low rates of N. Using the 15N enriched method, two(More)
Thirty one selected bean lines were evaluated in the field for ability to support N2 fixation when intercropped with maize which received 0, 30 and 60 kg N ha−1 as ammonium sulphate. The amount of fixed N2 was estimated using the natural variation of 15N and wheat as the standard non-fixing crop. Nitrogen as low as 15 kg N ha−1 at sowing suppressed nodule(More)
The 15 N(p,γ) 16 O reaction controls the passage of nucleosynthetic material from the first to the second carbon-nitrogen-oxygen (CNO) cycle. A direct measurement of the total 15 N(p,γ) 16 O cross section at energies corresponding to hydrogen burning in novae is presented here. Data have been taken at 90 – 230 keV center-of-mass energy using a windowless(More)
Recently, the LUNA collaboration has carried out a high precision measurement on the 3 He(α, γ) 7 Be reaction cross section with both activation and on-line γ-detection methods at unprecedented low energies. In this paper the results obtained with the activation method are summarized. The results are compared with previous activation experiments and the(More)
There is considerable interest to develop antigen-carriers for immune-modulatory clinical applications, but insufficient information is available on their effects on antigen-presenting cells. We employed virosomes coupled to ovalbumin (OVA) to study their interaction with murine bone marrow-derived dendritic cells (BMDCs) and modulation of downstream T cell(More)
Solar neutrino fluxes depend both on astrophysical and on nuclear physics inputs, namely on the cross sections of the reactions responsible for neutrino production inside the Solar core. While the flux of solar 8 B neutrinos has been recently measured at Superkamiokande with a 3.5% uncertainty and a precise measurement of 7 Be neutrino flux is foreseen in(More)
The nuclear physics input from the 3He(alpha,gamma)7Be cross section is a major uncertainty in the fluxes of 7Be and 8B neutrinos from the Sun predicted by solar models and in the 7Li abundance obtained in big-bang nucleosynthesis calculations. The present work reports on a new precision experiment using the activation technique at energies directly(More)
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