Search results for " ROS."

Stato, Chiesa e secolarizzazione: in dialogo con Antonio Rosmini

2021

The relation between state and Church is one of the main topics of Western political debate. In this essay I will stress that there is not a clear formula to face this topic. Therefore, it is necessary that Catholic philosophy and theology always reflect on the way this relation has to be thought as time goes by. More specifically, I will argue that the premise of liberal Catholicism, that is that a clear distinction between state and society exists, is today not more easily acceptable at all. This point is very important in order to reflect upon the relation between state and Church, political and religion, and public and private sfere in our age.

Synthesis and biological evaluation of 4-nitro-substituted 1, 3-diaryltriazenes as a novel class of potent antitumor agents

2011

Abstract We describe the synthesis and biological activity of a new class of 1,3-diaryltriazenes, namely 4-nitro-substituted 1,3-diaryltriazenes. Structure–activity relationship analysis reveals that 1,3-diaryltriazenes can be modified from inactive to highly cytotoxic compounds by the introduction of two nitro groups at the para positions of benzene rings and two additional electron-withdrawing groups (bromo, chloro, trifluoromethyl or fluoro substituents) at their ortho position. In order to increase the solubility of the modified compounds, we introduced various acyl groups to their triazene nitrogen. The results of LC-MS/MS analysis showed that N -acyltriazenes can be considered as prod…

Triterpene saponins from Billia rosea.

2017

Five previously undescribed triterpene saponins, billiosides A-E, and a known analogue, were isolated from the seeds of Billia rosea (Planch. & Linden) C. Ulloa & P. Jorg. Their structures were elucidated on the basis of extensive 1D and 2D NMR experiments (1H, 13C, DEPT, COSY, TOCSY, NOESY, ROESY, HSQC, and HMBC) and mass spectrometry as (3β,21β,22α)-3-[(2-O-β-D-glucopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-glucopyranosyl)oxy]-21-[((2E,6S)-2,6-dimethyl-6-hydroxyocta-2,7-dienoyl)oxy]-22-(acetyloxy)-24-hydroxyolean-12-en-28-oic acid, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-β-D-glucopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-α-L-arabinopyranosyl-(1 → 4)-β-D-glucopyranoside, (3β…

Streptomyces coelicolor secretoma protects astrocytes from oxidative stress

2016

Streptomycetes are gram-positive bacteria that produce about 2/3 of pharmaceutically active secondary metabolites, such as antibiotics, and anti-tumor, immunosuppressive, antifungal and antiparasitic agents. In this study, we investigated the possible effects of Streptomyces coelicolor extracts and putative vesicular fraction on primary cultures of rat astrocytes, in both physiological and stressed conditions, induced by treatment with hydrogen peroxide. Briefly, crude extracts and putative vesicular fractions were prepared from two S.coelicolor strains (M145 wild-type strain and bold F166 strain), and used to treat primary astrocytes, which were then also treated with hydrogen peroxide. Da…

Impiego di compost nella coltivazione in vaso di Rosmarinus officinalis L. e Capsicum annum L.

2009

Il substrato di coltivazione è un elemento di fondamentale importanza per le colture in contenitore. La torba, per le sue caratteristiche chimico-fisiche, è attualmente il substrato più utilizzato per la produzione di piante in vaso. Trattandosi, però, di un materiale organico proveniente da fonti non rinnovabili in tempi brevi, e in seguito alle politiche di protezione ambientale adottate dai principali paesi produttori del Nord Europa, la disponibilità di torba di qualità tende a diminuire, mentre il suo prezzo è in progressivo aumento. Si pone, pertanto, la necessità di individuare nuovi substrati di possibile utilizzo per la coltivazione di piante in vaso, in sostituzione della torba. L…

Sulfītu noteikšana vīnā un augļu sulā ar eksprestestu metodi

2015

Sulfītjonu noteikšana vīnā un augļu sulās ar eksprestestu metodi. Muktupāvels A., darba vadītājs LU ĶF docents Ģībietis J. Bakalaura darbs, 35 lappuses, 14 attēli, 9 tabulas, 19 literatūras avoti, 3 pielikumi. Latviešu valodā. Darbā pētīta para-rosanalīna-formaldehīda spektrofotometriskās metodes izmantošana sulfītu noteikšanai vīnā un augļu sulās. Izstrādāta para-rosanalīna-formaldehīda ekspresmetode sulfītu kvantitatīvajai noteikšanai vīnā un augļu sulās, izmantojot teststrēmeles. Analizēts sulfītu daudzums vairākos vīna un augļu sulu paraugos. Iegūtie rezultāti salīdzināti ar rezultātiem, kas iegūti ar standartmetodi.

Remarks on biology, vocalisations and systematics of Urocynchramus pylzowi Przewalski (Aves, Passeriformes)

2006

Several field studies in the Qinghai Nanshan area (Qinghai Province, China) have added new findings to the scant knowledge about Przewalski´s Rosefinch Urocynchramus pylzowi Przewalski, 1876. The hitherto completely unknown vocalisations are described and used to clarify systematic relationships. Although one could argue for a relationship to Uragus sibiricus (Pallas), based on nearly identical auditory impression and sonagram structures of their songs, detailed measurements show significant differences in time and frequency parameters. Moreover a mtDNA analysis shows no close phylogenetic relationship to either of three major emberizid clades. These results support the hypothesis that Uroc…

Primo contributo sui depositi a Terra Rossa dell'Abisso del Vento, Isnello (PA).

2007

Some species of the southeastern Italian Miocene giant galericine Deinogalerix (Mammalia, Eulipotyphla) revisited, with review of the genus

2018

• Revision of Deinogalerix remains from the Terre Rosse of Gargano stored at the University of Florence. • The material was assigned mainly to D. freudenthali, D. intermedius and D. minor. • The material improves our knowledge of the small and primitive species D. freudenthali. • The study confirms the validity of the lineages D. minor-D. brevirostris and D. intermedius-D. koenigswaldi.

Le verità prevalenti

2010

Difficile condensare in poche righe, i tanti spunti e le diverse sollecitazioni che scaturiscono dall’ultimo libro di Gian Carlo Caselli (Le due guerre. Perché l’Italia ha sconfitto il terrorismo e non la mafia, Melampo, Milano, 2009). I piani di lettura su cui si dispiega sono diversi e ciascuno apre una prospettiva da esplorare, fornisce differenti chiavi analitiche e interpretative. Quasi si trattasse di strati di sedimentazione in cui l’area del vissuto interseca gli aspetti più professionali, la sfera emotiva incrocia quella razionale. Un testo ricco, come ricca di esperienze è la vita del suo Autore che del testo costituisce la vera trama.