Search results for "TLE"

Glyphosate-based herbicide has soil-mediated effects on potato glycoalkaloids and oxidative status of a potato pest

2020

Glyphosate is the most used herbicide worldwide, targeting physiological pathways in plants. Recent studies have shown that glyphosate can also cause toxic effects in animals. We investigated the glyphosate-based herbicide (GBH)-induced changes in potato (Solanum tuberosum) plant chemistry and the effects of a GBH on the survival rate and oxidative status of the Colorado potato beetle (Leptinotarsa decemlineata). The beetles were reared on potato plants grown in pots containing soil treated with a GBH (Roundup Gold, 450 g/l) or untreated soil (water control). The 2nd instar larvae were introduced to the potato plants and then collected in 2 phases: as 4th instar larvae and as adults. The ma…

Interpretazioni fenomenologiche di Aristotele. Indicazione della situazione ermenutica

2005

The first Italian translation of the critical edition of Heidegger's "Natorp-Bericht"

The chemical composition of the aerial parts essential oil of four Phagnalon species collected in Sicily (Italy) and Greece

2022

The genus Phagnalon Cass., included in the Asteraceae family, has a wide distribution, expanding from Macaronesia in the West to the Himalayas in the East, from South France and Nord Italy to Ethiopia and Arabian Peninsula. Various species of Phagnalon have been used in the popular medicine of several countries as medicinal herbs and food. The extracts and the secondary metabolites, have a varied application spectrum at several biological levels, with antimicrobial, antioxidant, antidiabetic, antitumor, etc. properties having been reported. The essential oils of four taxa, Phagnalon rupestre, Phagnalon saxatile var. viride, and Phagnalon rupestre subsp. illyricum var. metlesicsii collected …

Active geodynamic in the central Mediterranean: Transfer of mantle fluids across the north-eastern Sicily

2019

Le colpe della cultura pagana: riflessioni sull'Epistola 69b di Giuliano

2002

The article is a reflection starting from the epistle 89b of the emperor Julian, which is presented as an illuminating document for the reconstruction of the values of the Hellenic civilisation, based on a precise paideutic-religious programme, which takes the form of a kind of canon of praiseworthy and/or inadvisable authors

Oxidation of melatonin by oxoferryl hemoglobin: A mechanistic study

2002

Reaction of melatonin with the hypervalent iron centre of oxoferryl hemoglobin, produced in aqueous solution from methemoglobin and H2O2, has been investigated at 37 degrees C and pH 7.4, by absorption spectroscopy. The reaction results in reduction of the oxoferryl moiety with formation of a heme-ferric containing hemoprotein. Stopped-flow spectrophotometric measurements provide evidence that the reduction of oxoferryl-Hb by melatonin is first-order in oxoferryl-Hb and first-order in melatonin. The bimolecular reaction constant at pH 7.4 and 37 degrees C is 112 +/- 1.0 M(-1) s(-1). Two major oxidation products from melatonin have been found by gas chromatography-mass spectroscopy: the cycl…

Thermal broadening of the Soret band in heme complexes and in heme-proteins: role of iron dynamics

1994

We report the thermal broadening of the Soret band in heme-CO, heme-OH and protoporphyrin IX in the temperature range 300-20 K. For protoporphyrin IX the temperature dependent Gaussian line broadening follows the behavior predicted by the harmonic approximation in the entire temperature range investigated. In contrast, for heme-CO and heme-OH the harmonic behavior is obeyed only up to about 180 K and an anomalous line broadening increase is observed at higher temperatures. This effect is attributed to the onset of anharmonic motions of the iron atom with respect to the porphyrin plane. Comparison with previously reported analogous data for heme proteins enables us to suggest that the onset …

Egg and larval load assessment and its influence on oviposition behaviour of the leaf beetle Galerucella nymphaeae

1993

The oviposition behaviour of the water-lily beetle Galerucella nymphaeae was examined. This species is a specialist herbivore on the floating leaves of nymphaeids Nymphaeaceae and especially on the yellow water-lily, Nuphar lutea. Females lay their eggs in clutches on the leaves, and after hatching, the larvae feed on the leaves. The quality of the leaves decreases quickly after the larvae hatch, and eventually the leaves will sink below the water surface, whereupon the eggs, 1st-instar larvae and pupae are killed by drowning. The influence of conspecific eggs, larvae and feeding tracks on the oviposition preferences of the beetles was tested. Females were allowed to choose between fresh le…

Interactions between willows and insect herbivores under enhanced ultraviolet-B radiation

2002

We studied the effects of elevated ultraviolet-B radiation on interactions between insect herbivores and their host plants by exposing two species of phytochemically different willows, Salix myrsinifolia and S. phylicifolia, to a modulated increase in ultraviolet radiation in an outdoor experiment and monitoring the colonisation of insect herbivores on these willows. We examined the effect of increased ultraviolet-B (UV-B) radiation on (1) the quality of willow leaves, (2) the distribution and abundance of insect herbivores feeding on these willows, (3) the resulting amount of damage, and (4) the performance of insect larvae feeding on the exposed plant tissue. Six clones of each of the two…

La battaglia di Himera nelle Storie di Erodoto e il sincronismo con Salamina

2022

The very short report of the battle of Himera given by Herodotus’ Histories seems to have the primary aim of supporting a widespread tradition among the inhabitants of Sicily (still circulating at the time when the historian lived) about the true reason preventing Gelon from siding with the Hellenic League against Persians: he was impelled to engage in the battle of Himera, which took place the very same day as the sea battle of Salamis. No celebratory intent emerges from the account of Gelon’s and Theron’s victory over the Carthaginians, since Herodotus wants to report all the versions known to him about the explanations given to Gelon’s refusal to join the Hellenic League; there is no roo…