Search results for "Radical"
showing 10 items of 1401 documents
Modyfikacja polietylenu kwasem itakonowym
2003
W celu nadania właściwości hydrofilowych, które powinny ułatwić rozkład odpadów w środowisku naturalnym, przeprowadzono szczepienie PE-LD kwasem itakonowym (KI) wobec nadtlenku dikumylu (DCP). Proces realizowano dwuetapowo w wytłaczarce jednoślimakowej, stosując różne stężenia KI (3—10% mas.) i DCP (do 1,1% mas.). Metodą pirolitycznej chromatografiigazowej (Py/GC/MS) zidentyfikowano produkty termicznego rozkładu KI. Analiza FT-IR wykluczyła ich obecność w kompozycjach po szczepieniu, natomiast sugerowała szczepienie KI. Metodą ekstrakcji wodnej ustalono, że wraz ze wzrostem stężenia KI i DCP wzrasta stopień szczepienia, natomiast w całym badanym zakresie stężeń DCP w kompozycjach zawierając…
Laparoscopic versus open retropubic intrafascial nerve-sparing radical prostatectomy: surgical and functional outcomes in 300 patients
2010
La radicalidad del mal banal
2002
El concepto de ‘banalidad del mal’ fue introducido por Hannah Arendt a fin de caracterizar una forma inédita de perversidad que ella vio encarnada en Adolf Eichmann y otros criminales nazis. Arendt consideraba que esa forma de perversidad estaba muy alejada de la noción de ‘mal radical’ que Kant había acuñado y la propia Arendt había empleado en trabajos anteriores. El objetivo principal del artículo es mostrar que hay más afinidades entre el mal radical kantiano y la banalidad del mal de lo que la propia Arendt reconoce. ‘Banality of evil’ was a concept introduced by Hannah Arendt in order to characterize a new form of wickedness embodied in people as Adolf Eichmann and others nazis crimin…
«(Des)obediències de la reducció vocàlica en el català de Mallorca»
2013
En el català de Mallorca, el procés de reducció vocàlica de les vocals mitjanes de la sèrie anterior a e neutra en posició àtona no opera (o subaplica) en determinades circumstàncies: (a) en formes derivades productives amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada o e oberta en el radical de la forma primitiva; (b) en formes verbals amb una vocal àtona situada a la síl·laba esquerra o inicial del radical i alternant amb e tancada en una altra forma verbal del mateix paradigma flexiu; (c) en manlleus i paraules apreses amb una vocal àtona e situada, també, a la síl·laba esquerra o inicial del radical i generalment precedida d’una consonan…
VOX Spain: The Organisational Challenges of a New Radical Right Party
2021
This article examines the organisation of VOX, a new radical right party in Spain. It shows that the party has taken early and uneven steps to build a mass organisation and initially opted for open membership recruitment with participatory organisational elements. Also, the party’s rapid growth and quick entrance into political institutions at different state levels led the party leadership to establish more centralised control and limit members’ prerogatives, though recruitment continued. Centralisation in part responds to organisational needs given the party’s quickly acquired political relevance, but also to the desire of the central party leadership to forestall the articulation of terr…
Indagini EPR su legni moderni e antichi
2009
La tecnica EPR e'stata applicata allo studio di legni moderni ed antichi. I legni deteriorati mostrano un segnale EPR molto piu'intenso di quelli non deteriorati. Questo risultato puo' essere spiegato dall'aumento dei radicali liberi nei campioni deteriorati.
Lipoperoxyl radical scavenging activity of the phytochemical betanin and its aglycone in aqueous/lipid membrane system. Kinetics and mechanistic aspe…
2009
Biogenic Fenton process - A possible mechanism for the mineralization of organic carbon in fresh waters.
2020
To explore the mechanisms that mineralize poorly bioavailable natural organic carbon (OC), we measured the mineralization of OC in two lake waters over long-term experiments (up to 623 days) at different pH and iron (Fe) levels. Both the microbial and photochemical mineralization of OC was higher at pH acidified to 4 than at the ambient pH 5 or an elevated pH 6. During 244 days, microbes mineralized up to 60% of OC in the 10-mu m filtrates of lake water and more than 27% in the 1-mu m filtrates indicating that large-sized microbes/grazers enhance the mineralization of OC. A reactivity continuum model indicated that the acidification stimulated the microbial mineralization of OC especially i…
Dicyclopentaannelated Hexa-peri-hexabenzocoronenes with a Singlet Biradical Ground State
2021
Abstract Synthesis of two dicyclopentaannelated hexa‐peri‐hexabenzocoronene (PHBC) regioisomers was carried out, using nonplanar oligoaryl precursors with fluorenyl groups: mPHBC 8 with two pentagons in the “meta”‐configuration was obtained as a stable molecule, while its structural isomer with the “para”‐configuration, pPHBC 16, could be generated and characterized only in situ due to its high chemical reactivity. Both PHBCs exhibit low energy gaps, as reflected by UV‐vis‐NIR absorption and electrochemical measurements. They also show open‐shell singlet ground states according to electron paramagnetic resonance (EPR) measurements and density functional theory (DFT) calculations. The use of…
Room-Temperature Magnetic Bistability in a Salt of Organic Radical Ions
2021
International audience; Cocrystallization of 7,7′,8,8′-tetracyanoquinodimethane radical anion (TCNQ −•) and 3-methylpyridinium-1,2,3,5dithiadiazolyl radical cation (3-MepyDTDA +•) afforded isostructural acetonitrile (MeCN) or propionitrile (EtCN) solvates containing cofacial π dimers of homologous components. Loss of lattice solvent from the diamagnetic solvates above 366 K affords a high-temperature paramagnetic phase containing discrete TCNQ −• and weakly bound π dimers of 3-MepyDTDA +• , as evidenced by X-ray diffraction methods and magnetic susceptibility measurements. Below 268 K, a first-order phase transition occurs, leading to a low-temperature diamagnetic phase with TCNQ −• σ dimer…