Preparation and Characterization of a Stable Semiquinone-Iron Complex

Different Sources and Concentrations of 6-BA in Chemical Thinning of Post-flowering in Apple Trees

“…However, for the average fresh fruit mass, the opposite behavior was observed, with a maximum increase in the mean fruit mass in the dose of Exilis 4,53 L ha -1 (90.6 mgL -1 ). Similar results are presented by other authors, such as Barreto et al [8], which, working with increasing doses of BA for load adjustment in peach trees, reported behavior similar to those observed in the present study, characterized by an increase in the percentage of abscision and mass of fruits, in response to the increase of applied dosage, excess of fruits with doses of 400 mg L -1 . For 'Fuji Suprema' apple trees it has already been proven in other studies that the highest concentrations of BA are more effective in the thinning, however, there is some reduction in its effectiveness when applied to fruits with a diameter greater than 10 mm in comparison to the application in fruits [9].…”

“…According to Ambrožič Turk and Stopar [25], BA can be active as a raleante in a broader period of phenological phases, from the end of flowering to fruits with 20 mm in diameter, not only in fruit between 10 mm, indicated by many reports, and the persistence of the raleante effect of BA can extend for up to 18 days after application. For an efficient chemical thinning with BA, the dose of the product must be taken into account, together with the climatic conditions and the cultivar [8].…”

“…The use of chemical products aimed at fruit thinning is a technique consolidated in the apple tree culture, mainly due to the practicality of application, as it allows an adequate adjustment of the fruit load when applied correctly and at the right moment of the development (stage) of the fruits [5]. As the time of application of the chemical thinners, the formulation, the mode of action of these products, as well as the worked cultivar can determine the efficacy of chemical thinning [6,7,8].…”

Iron oxide and pyrocatechol: a spectroscopy study of the reaction products

“…The iron complex formation has been studied with various catecholate and semiquinonate ligands [14][15][16][17][18][19] . Pyrocatechol is the simplest molecule of the o-phenols and is useful as a model molecule to verify which are its reaction products in a reducing medium: polymeric compounds, such as humic acids in soil, or stabilizers such as monomeric compounds.…”

Magnetic Decoupling of Surface Fe3+ in Magnetite Nanoparticles upon Nitrocatechol‐Anchored Dispersant Binding

“…The broad absorption at g ≅2 is most likely caused by nonspecific Fe 3+ configurations with strong dipole–dipole interactions,17 the sharp signal at g =2.00 is due to radicals and the signal at g =4.25 originates from Fe 3+ in a rhombohedrally distorted ligand field 14. 17–19…”