1,354,064 research outputs found
Reactions of alfa-Diazoketones. II. A Study of the Influence of Alkyl and Phenyl alfa'-Substitutions on the Acetolysis of alfa'-Arylthio-alfa-diazoketones. Further Examples of Intramolecular Rearrangement Involving the 1,3 Shift of the Phenylthio Group.
No full textChiral 2-(2-diphenylphosphinophenyl)-5,6,7,8-tetrahydroquinolines: new P,N-ligands for asymmetric catalysis
No full textCyclopropanation of styrene with diazoacetates catalyzed by copper and rhodium complexes of new chiral 2,2':6',2''-terpyridines derived from natural occurring compounds
No full textChiral thienylpyridines as N,S-ligands for asymmetric catalysis. Palladium-catalyzed allylic alkylation and copper-catalyzed cyclopropanation reactions
No full textNucleophilic Substitution of alfa-Haloketones. XX. New Features in the Acetolysis of 1-Chloro-3-phenylthio-2-propanone. The Intermediacy of Ion Pairing in the Reversible 1,3 Shift of the Chlorine.
No full textSynthesis of Optically Active 2- and 3-sec-Butyl Half-Protected Succinaldehydes through a Common Intermediate
No full textA reversed phase HPLC method for the simultaneous determination of all monosaccharides contained in galactosaminoglycan isomers from human aorta proteoglycans
No full textPredictive Modelling of Maize Yield Using Sentinel 2 NDVI
No full textAccurate yield prediction is essential for precision agriculture as it
enables farmers to optimize their inputs and manage their resources more efficiently,
ultimately leading to higher profitability and sustainable farming practices.
The aim of this research is to verify whether satellite images can be a valid tool
for predicting yield in summer maize (Zea mays L.). The study was conducted in
2022 in two adjacent fields in Umbria, Italy. The approach adopted is based on
the use of NDVI (Normalized Difference Vegetation Index) data from Sentinel 2
(S2) satellites and yield data from combine harvesters to estimate the grain yield
of maize. The NDVI data, derived from S2 images acquired at different growth
cycle stages, were used for a Principal Component Analysis (PCA). Subsequently,
a multiple linear regression (MLR) model was created. The results show a significant
correlation between NDVI and grain yield, suggesting that the central stages
of the maize phenological cycle are more indicative for this purpose. Further
experiments are necessary to confirm the effectiveness of the proposed approach,
using more specific vegetation indices or including soil and climate data in the
procedure, thus obtaining more comprehensive responses
Chiral 2,2'-bipyridines, 5,6-dihydro-1,10-phenanthrolines and 1,10-phenanthrolines as ligands for enantioselective palladium catalyzed allylic substitution
No full textReactions of alfa Diazoketones. I. Acetolysis of alfa'-Aryloxy- and alfa '-Arylhio-alfa -diazoketones. An Intramolecular Rearrangement Involving the Neighbouring Thioether Function
No full text- …
