1,721,040 research outputs found
Chromosomal localization of rDNA in sunflower (Helianthus annuus L.) by fluorescent in situ hybridization
No full textNuovi metodi di sintesi di derivati 2(5H)-furanonici naturali, achirali e chirali non racemi, biologicamente attivi
No full textMore insecure and less paid? The effect of perceived job insecurity on wage distribution
No full textThis article employs a Counterfactual Decomposition Analysis (CDA) using both a semi-parametric and a non-parametric method to examine the pay gap due to perceived job insecurity over the entire wage distribution of dependent workforce in Italy. Using the 2015 INAPP Survey on Quality of Work, our results exhibit a mirror J-shaped pattern in the pay gap between secure and insecure workers, with a significant sticky floor effect, i.e. a greater effect of job insecurity at the lowest quantiles. This pattern is mainly due to the characteristics effect, while the relative incidence of the coefficient component accounts roughly for 22% up to 36% of the total difference, being more relevant at the bottom of the wage distribution
A concise and efficient novel synthesis of cleviolide
No full textCleviolide 1 has been synthesized in 73 % overall yield by a short reaction sequence involving the preparation of 4-methyl-1-trimethylsilylpent-3-en-1-yne 7 from trimethylsilylethynylzinc chloride 6 and 1-bromo-2-methylpropene 5, the direct conversion of 7 into the corresponding 1-tributylstannyl derivative 8 and the Pd-catalysed reaction of this organotin derivative with 4-bromofuran-2(5H)-one 10
A novel route to 6-substituted and 5,6-disubstituted 2-pyrones
No full text6-Alkyl- and 6-(1-alkenyl)-5-iodo-2-pyrones, which are available as major products by reaction of the corresponding (Z)-2-en-4-ynoic acids with iodine and NaHCO3 in CH3CN, undergo insertion of activated zinc metal into their carbon-iodine bond to provide the corresponding 5-(iodozinc)-2-pyrones. Hydrolysis of these organometallics gives 6-substituted 2-pyrones in satisfactory yields including two natural products. On the other hand, the Pd-catalyzed reaction of the organozines either with an activated alkenyl halide or with activated and deactivated (hetero)aryl halides provides 5,6-disubstituted 2-pyrones in fair to good yields. (C) 2001 Elsevier Science Ltd. All rights reserved
Metodologie citologiche avanzate per il trasferimento di geni di resistenza a stress biotici in Solanum sp. e Triticum sp
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Metodologie citologiche avanzate per il trasferimento di geni di resistenza a stress biotici in Solanum sp. e Triticum sp
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