Search results for "Viol"

Solar PAR and UVR modify the community composition and photosynthetic activity of sea ice algae

2015

The effects of increased photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) on species diversity, biomass and photosynthetic activity were studied in fast ice algal communities. The experimental set-up consisted of nine 1.44 m(2) squares with three treatments: untreated with natural snow cover (UNT), snow-free (PAR + UVR) and snow-free ice covered with a UV screen (PAR). The total algal biomass, dominated by diatoms and dinoflagellates, increased in all treatments during the experiment. However, the smaller biomass growth in the top 10-cm layer of the PAR + UVR treatment compared with the PAR treatment indicated the negative effect of UVR. Scrippsiella complex (mainly…

Lepori, Maria: Bande, fazioni, trame. La nobiltà rurale tra violenza e giustizia nella Sardegna del Settecento

2021

Pomiędzy jawą a snem. Motyw piękna i przemocy w "Krystalicznej sieci" Mirko Kovača

2012

The narrator of Crystal Gates who is the protagonist of the novel too is making areconstruction of his youth and the artistic life in Belgrade of the 1960s. As he said, he has seen the past “in the lucid intervals” and dreams are really important in the story. They are usually connected with the real life and sometimes they are a kind of vision. The most important themes of the novel are beauty and violence. They are still related to each other, because they are two points of human life in general. The narrator is abudding writer, earning his living by trading in works of art and moving in artistic circle. On the other hand, he gets into touch with the exponents of new authorities (communis…

Dialettica della violenza. Da Hegel a Benjamin

2010

Photocatalytic oxidation mechanism of benzonitrile in aqueous suspensions of titanium dioxide

2007

Abstract The photocatalytic oxidation of benzonitrile was carried out in aqueous suspensions (pH 11) of commercial polycrystalline TiO 2 (Merck and Degussa P25) irradiated by ultraviolet light. The rate of decomposition was dependent on the concentration of benzonitrile and followed a pseudo-first order kinetics. The complete mineralization of a 0.70 mM benzonitrile solution was achieved in ca. 8 h by using TiO 2 Degussa P25, whereas the substrate was only partially mineralized even after 14 h of irradiation in the presence of TiO 2 Merck. The final oxidation products were carbonate and nitrate. The appearance and the evolution of organic and inorganic intermediate species were also investi…

La strage delle donne nell'opera: complicità e denuncia della rappresentazione

2016

The massacre of women, always present in the opera from its origin, is especially spread in the nineteenth century and has its popular specimen in La traviata by Giuseppe Verdi; it doesn’t disappear in the musical theatre of the twentieth century which indeed started with the death on stage of a female figure, mysterious and unconventional, the Mélisande by Maetherlimk and Debussy, killed by the common destiny for all women. Purpose of this paper is to show how the music in the theatre plays a different role which depends on different compositional modes in similar dramatic events and so it is able to give different sense to similar episodes of violence against women. Transgressive linguist…

Chromatographic separation of chlorthalidone enantiomers using β-cyclodextrins as chiral additives

2000

Different beta-cyclodextrins have been tested as chiral additives in the mobile phase for the chromatographic analysis of chlorthalidone enantiomers in a C18 LiChrospher (125 x 4 mm I.D.) column. The effect on enantioresolution of different parameters was studied: composition of the mobile phase (percentage of organic solvent, type of buffer and pH), mobile phase flow-rate, and type and concentration of beta-cyclodextrin. A 25:75 mixture of methanol and 0.1 M phosphate buffer, pH 4, containing 2% triethylamine (v/v), and 12.5 mM beta-cyclodextrin, at a flow-rate of 0.8 ml/min, was found to be the best option for the resolution of chlorthalidone enantiomers. Under such conditions, linear cal…

In-flight calibration of the ROSAT HRI ultraviolet sensitivity

2000

Comparing measured and estimated count rates of a few selected sample stars, we confirm the validity and provide the in-flight calibration of the ROSAT HRI UV/visible effective area model in Zombeck et al. The count rate estimates for Betelgeuse derived with this model are in agreement with the measured HRI upper limit. This result is also confirmed in an erratum by Berghöfer et al. aimed at revising their previous calculation, which was overestimated by more than 2 orders of magnitude. Adopting this ROSAT HRI UV/visible effective area model and measured UV/visible spectra of a set of sample stars covering the range of Teff 3000-40,000 K, we have built the calibration curves to estimate UV/…

Trauma and storytelling in Betty Louise Bell’s Faces in the Moon

2018

The dominant understanding of trauma as an epistemological crisis that can be mimetically passed on to readers has in the twenty-first century been criticized for its apolitical and ahistorical ori...

Behavioural evidence for ultraviolet vision in a tetraonid species - foraging experiment with black grouse Tetrao tetrix

2002

In addition to wavelengths visible to humans (400-700 nm), many birds are able to detect near ultraviolet light (320-400 nm). Most studies of ultraviolet (UV) vision in birds have concentrated on the importance of UV vision in intraspecific signalling, especially in passerine birds. However, birds may also use UV vision for other purposes, e.g. foraging. We performed a laboratory experiment to test whether a tetraonid species, black grouse Tetrao tetrix, could detect the difference between UV-reflecting and non-UV-reflecting food items (two colour morphs of bilberry Vaccinium myrtillus). Black grouse preferred UV-reflecting berries when UV light was used for illumination, but showed no pref…