Role of the caffeic acid oxidation products on the iron mobilization at the soil-root interface

Previous results show that the reduction of Fe(III) by caffeiic acid (CAF) is strongly influenced by the pH of the reaction medium (DEIANA et al., 1995). In particular, it has been found that al pH > 3.8 the reducing activity of CAF towards the Fe(III) ions in solution is low, but it increases when Fe(III) is complexed as Fe(III)-polygalacturonate. The mobilization of the Fe(II) ions, which form upon the Fe(III) reduction, has been shown to depend mainly on the nature of the Fe(III)-polygalacturonate complexes (DEIANA et al., 1994a). In particular, it bas been observed a high redox activity of CAF towards Fe(III) when the metal ion is coordinated by the carboxilic groups of the macromolecule. The Fe(III) reduction has been found to decrease when an oxydrilic group was inserted in the Fe(III) coordination sphere. The Fe(II) produced partly diffuses into the external solution and partly is still strongly held by the polysaccharidic matrix. The oxidation of CAF by Fe(III) gives rise to the formation of products (OP) with different polymerization degree, some of which are similar to those found in natural systems (DEIANA et al., 1994b). In order to determine the role of these products in the Fe(III) reduction as well as in the mobilization of the Fe(II) produced it was set up an electrochemical method to synthetize these products (DEIANA et al., 1994b). Here are reported some results about the interaction which establish between the CAF oxidation products and iron in both oxidized and reduced form

Landscape and Agriculture 4.0: A Deep Farm in Italy in the underground of a Public Historical Garden

Each landscape is the result of an encounter with the culture of a community and the physical features of a territory. The conservation of the historical, artistic, and cultural heritage represents a priority for any society that wishes to draw on references for its civil progress. The aim of the present research is to combine the richness of the historical–cultural heritage with innovative forms of agriculture. It focuses on the recovery, in productive terms, of an air-raid shelter used during the SecondWorldWar, located in the center of Varese beneath the Estensi Historical Gardens. The project involves the construction of an underground Vertical Farm (Deep Farm) with the aim of restoring a place of memory, making it more accessible than it is today, and raising public awareness about a new cultivation model. A Deep Farm was designed with a cultivation area in the middle, an educational room, and two hygiene rooms, one at each end of the tunnel. A Vertical Farm was conceived to be shared with local stakeholders to produce vegetables and to foresee an innovative reality in the field of education and tourism. This project has the ambition of representing a model that could be used for similar Italian realities and enhancing meeting places between landscape and modern culture diversities

Programmi di valutazione esterna di qualit? EQAS-CNR: gestione integrata di differenti VEQ attraverso l'uso dell'Information & Communication Technology

not availableLa Qualit? dei servizi ? un fattore d'importanza crescente. Diffondere la cultura della qualit? diventa una pratica fondamentale a garanzia dell'utente finale portando un beneficio indiretto anche al fornitore del servizio. I programmi di Valutazione Esterna di Qualit? (VEQ) sono fondamentali nel Sistema Qualit? dei laboratori clinici. In tutti i sistemi di valutazione e di accreditamento dei laboratori, i programmi di VEQ appaiono come elementi indispensabili per garantire in maniera obiettiva la competenza professionale e la qualit? delle prestazioni stimolando un continuo miglioramento. Il poster descrive le scelte effettuate nella progettazione ed implementazione del sistema informativo EQAS-CNR per la gestione delle VEQ

Elemental Fingerprinting Combined with Machine Learning Techniques as a Powerful Tool for Geographical Discrimination of Honeys from Nearby Regions

Discrimination of honey based on geographical origin is a common fraudulent practice and is one of the most investigated topics in honey authentication. This research aims to discriminate honeys according to their geographical origin by combining elemental fingerprinting with machinelearning techniques. In particular, the main objective of this study is to distinguish the origin of unifloral and multifloral honeys produced in neighboring regions, such as Sardinia (Italy) and Spain. The elemental compositions of 247 honeys were determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The origins of honey were differentiated using Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA), and Random Forest (RF). Compared to LDA, RF demonstrated greater stability and better classification performance. The best classification was based on geographical origin, achieving 90% accuracy using Na, Mg, Mn, Sr, Zn, Ce, Nd, Eu, and Tb as predictor

Elemental fingerprinting combined with machine learning techniques as a powerful tool for geographical discrimination of honeys from nearby regions

Discrimination of honey based on geographical origin is a common fraudulent practice and is one of the most investigated topics in honey authentication. This research aims to discriminate honeys according to their geographical origin by combining elemental fingerprinting with machine-learning techniques. In particular, the main objective of this study is to distinguish the origin of unifloral and multifloral honeys produced in neighboring regions, such as Sardinia (Italy) and Spain. The elemental compositions of 247 honeys were determined using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The origins of honey were differentiated using Principal Component Analysis (PCA), Linear Discriminant Analysis (LDA), and Random Forest (RF). Compared to LDA, RF demonstrated greater stability and better classification performance. The best classification was based on geographical origin, achieving 90% accuracy using Na, Mg, Mn, Sr, Zn, Ce, Nd, Eu, and Tb as predictors

On the Faint End of the Galaxy Luminosity Function in the Epoch of Reionization: Updated Constraints from the HST Frontier Fields

Ultra-faint galaxies are hosted by small dark matter halos with shallow gravitational potential wells, hence their star formation activity is more sensitive to feedback effects. The shape of the faint end of the high-z galaxy luminosity function (LF) contains important information on star formation and its interaction with the reionization process during the Epoch of Reionization. High-z galaxies with {M}UV}≳ -17 have only recently become accessible thanks to the Frontier Fields (FFs) survey combining deep HST imaging and the gravitational lensing effect. In this paper we investigate the faint end of the LF at redshift >5 using the data of FFs clusters Abell 2744 (A2744), MACSJ0416.1-2403 (M0416), MACSJ0717.5+3745 (M0717), and MACSJ1149.5+2223 (M1149). We analyze both an empirical and a physically motivated LF model to obtain constraints on a possible turnover of LF at faint magnitudes. In the empirical model the LF drops fast when the absolute UV magnitude {M}UV} is much larger than a turnover absolute UV magnitude {M}UV}{{T}}. We obtain {M}UV}{{T}}≳ -14.6 (15.2) at the 1 (2)σ confidence level (C.L.) for z ∼ 6. In the physically motivated analytical model, star formation in halos with circular velocity below {v}c* is fully quenched if these halos are located in ionized regions. Using updated lensing models and new additional FFs data, we re-analyze previous constraints on {v}c* and f esc presented by Castellano et al. using a smaller data set. We obtain new constraints on {v}c* ≲ 59 km s-1 and f esc ≲ 56% (both at 2σ C.L.) and conclude that there is no turnover detected so far from the analyzed FFs data. Forthcoming JWST observations will be key to tightening these constraints further

ECSGS Management Plan

Version 0.9 reviewed by ESA at the Euclid SGS Preliminary Requirements Review (2013) Version 1.9 reviewed by ESA at the Euclid SGS System Requirements Review (2015)The ECSGS Management Plan is focused on the following topics: ECSGS organisation, responsibilities, reporting; ECSGS costing, manpower, effort tracking; ECSGS logistic (when relevant); organisation of individual OUs and SDCs under ECSGS coordination. Sections 9 and 10 contain global and local organisation details, and the names of responsible staff. The management principles expressed in this document are a coherent extension of those described in the ECSGS Science Implementation Plan. The document is compliant with the ECSS standards, as tailored for the Euclid SGS

A Copper-Catalysed Amidation of Aldehydes via N-Hydroxysuccinimide Ester Formation

A copper-catalysed oxidative amidation of aldehydes via N-Hydroxysuccinimide ester formation is reported. The methodology, employed to prepare amides directly from aldehydes, has a very wide scope, with high yields and does not need dry conditions. This cross-coupling reaction appears simple and makes use of cheap, abundant and easily available reagent

ChemInform Abstract: A Copper-Catalyzed Amidation of Aldehydes via N-Hydroxysuccinimide Ester Formation.

A copper-catalysed oxidative amidation of aldehydes via N-Hydroxysuccinimide ester formation is reported. The methodology, employed to prepare amides directly from aldehydes, has a very wide scope, with high yields and does not need dry conditions. This cross-coupling reaction appears simple and makes use of cheap, abundant and easily available reagent