177,054 research outputs found
Adaptation of aromatic Burley tobacco varieties to Northern Italian environments
No full textFrom 1985 to 1987 eight varieties of domestic and foreign Burley tobacco were studied in some Northern Italy locations (Veneto Region) , as an alternative to the air-cured light and dark tobacco presently grown in that area.
An average 3-year yield equal to or higher than 3 t /ha of cured leaf was obtained for all the tested varieties, which indicates a general adaptation to the environment. Early-flowering types were more productive than late-flowering ones; the qualitative leaf traits (alkaloid content, combustibilty and specifi leaf weight) were mainly realted to the growing seasons. The yield stability thest and the mean leaf yields highlighted CAS 83-1A and CAS 83-1E cultivars as high-yielding and stable genotypes, and Virginia 528 as a medium to high yielding genotype adapted to less favourable conditions
Quantitative material characterization based on the spectral decomposition of X-ray tomographic images
No full textA single-energy CT provides a map of gray levels simply related to X-rays linear attenuation coefficients, which could be very similar for different materials at a given energy. Images acquired at multiple energies allows for a quantitative description of an object. In this work, phantom images were acquired using synchrotron radiation CT at precisely defined energies. A successful attempt was made to differentiate the phantom materials with respect to their decomposition into basis materials
EFFICACY OF RUE EXTRACT, SODIUM BICARBONATE AND FUNGICIDES AT REDUCED RATES TO CONTROL OF POWDERY MILDEW ON TOBACCO.
No full textOptimization of nitrogen fertilization on Burley tobacco suited for mechanical harvesting
No full textInflationary solutions in asymptotically safe f(R) theories
No full textWe discuss the existence of inflationary solutions in a class of renormalization group improved polynomial f(R) theories, which have been studied recently in the context of the asymptotic safety scenario for quantum gravity. These theories seem to possess a nontrivial ultraviolet fixed point, where the dimensionful couplings scale according to their canonical dimensionality. Assuming that the cutoff is proportional to the Hubble parameter, we obtain modified Friedmann equations which admit both power-law and exponential solutions. We establish that for sufficiently high-order polynomial the solutions are reliable in the sense that considering still higher-order polynomials is very unlikely to change the solution
Effetti dell’irrigazione con acque saline su alcune caratteristiche biometriche e quanti-qualitative del tabacco
No full textAppropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
EFFETTO DELL’IRRIGAZIONE IN DEFICITE DEL METODO IRRIGUOSULLA RESA DI TABACCO(NICOTIANA TABACUM L.) TIPO BURLEYALLEVATO IN AMBIENTE MEDITERRANEO
No full textVerifica agronomica della tecnica innovativa dei contenitori biodegradabili per la produzione di piantine di tabacco idonee al trapianto
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