Search results for "Alate"
showing 10 items of 695 documents
Effects of phenolic-like intercalated layered double hydroxides on poly(lactic acid) based nanocomposites
2015
Two phenolic-like antioxidants (AOs), 3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate and 6-hydroxy-2,5,7,8-tetrametilcromano-2-carboxylate anions, were intercalated by anion exchange in layered double hydroxides (LDHs). The two AO-LDHs were dispersed by ultrasound-assisted solution mixing in poly(lactic acid) (PLA) and the thermal oxidation stability of the composites was evaluated following the variation of the molecular weight by SEC, after a controlled aging process, and determining the oxidation induction time (OIT) by DSC. The results evidenced that the intercalation of both the AO molecules within the LDH galleries prevent their own thermal and thermo-oxidative degradation as well a…
Phytosociological characterization of the Celtis tournefortii subsp. aetnensis microwoods in Sicily
2014
A work on the Celtis tournefortii subsp. aetnensis vegetation, endemic species located in disjointed sites in the Sicilian inland, is here presented. It forms microwoods with a relict character established on screes and detrital coverages, on a variety of lithological substrates (volcanics, limestones, quartzarenites). Based on the phytosociological analysis carried out in the territory, these vegetation aspects are framed in the alliance Oleo-Ceratonion, within which a new association (Pistacio terebinthi-Celtidetum aetnensis) is described, in turn diversified in the following subassociations: a) typicum subass. nova, on detrital calcareous cones of the north-western part of Sicily, in the…
Chromatin structure of the 5′ flanking region of the yeastLEU2 gene
1989
The chromatin structure of theLEU2 gene and its flanks has been studied by means of nuclease digestion, both with micrococcal nuclease and DNase I. The gene is organized in an array of positioned nucleosomes. Within the promoter region, the nucleosome positioning places the regulatory sequences, putative TATA box and upstream activator sequence outside the nucleosomal cores. The tRNA3 Leu gene possesses a characteristic structure and is protected against nucleases. Most of the 5′ flank is sensitive to DNase I digestion, although no clear hypersensitive sites were found. The chromatin structure is independent of either the transcriptional state of the gene or the chromosomal or episomal loca…
<p><strong>Typification of the name <em>Galatella sorrentinoi </em>(Asteraceae)</strong></p>
2020
Tripolium sorrentinoi (Todaro 1858: 42) Raimondo & Greuter (2005: 59) (Asteraceae) is a species endemic to Sicily. In this island, it grows on badlands in the Palermo, Enna, Caltanissetta, and Agrigento Provinces, between the coast and the hinterland mountains. Its phytogeographical interest is remarkable because it occurs in selective habitats, where it is often the sole phanerogamic inhabitant. Due to its small population size and to a continuing decline of mature individuals, T. sorrentinoi was assessed as “Vulnerable” (VU) according to the IUCN criteria (Domina & Troia 2016).
Growth and biomass partitioning of Arbutus unedo, Laurus nobilis, Phillyrea angustifolia and Rhamnus alaternus seedlings under water deficit
2013
Water scarcity in the Mediterranean areas is very common and the selection of drought tolerant species is a priority for landscaping purposes in the Mediterranean areas. The objective of this study was to evaluate the effect of water deficit on growth and biomass partitioning of Arbutus unedo, Laurus nobilis, Phillyrea angustifolia and Rhamnus alaternus. Seventy-two seedlings per species were grown in the greenhouse in 4-liter pots and three water regimes were imposed starting on 6 April and until 9 June, 2010. One-third of the plants was well irrigated to maintain soil water content in the 25-35% range (CTR); a second group of plants was deficit-irrigated to maintain soil water content in …
Formation of l(-)malate by Saccharomyces cerevisiae during fermentation
1988
When grown in a synthetic medium most of the 51 strains of the genera Saccharomyces, Saccharomycodes, Zygosaccharomyces and Schizosaccharomyces investigated formed l-malate during fermentation. The quantity varied between 0.1 and 2.6 g malate per liter. Two strains of Saccharomyces cerevisiae synthesized malate at a rate of about 1.5 g/l. Malate was liberated during the growth phase and not metabolized during the stationary phase. Optimum malate formation was observed at a sugar concentration of about 20% (w/v), at pH 5 and at suboptimal nitrogen concentrations of less than 300 mg N/liter. Of the amino acids aspartate and glutamate were most favourable. If ammonium salts were used as the ni…
CCDC 1835272: Experimental Crystal Structure Determination
2021
Related Article: Mamadou Ndiaye, Mouhamadou Birame Diop, Abdoulaye Samb, Libasse Diop, Allen G. Oliver, Laurent Plasseraud|2020|Zeitschrift fuer Naturforschung, Teil B. Anorganische Chemie, Organische Chemie|75|815 |doi:10.1515/znb-2020-0097
CCDC 1491308: Experimental Crystal Structure Determination
2016
Related Article: Verónica Jornet-Mollá, Yan Duan, Carlos Giménez-Saiz, João C. Waerenborgh, Francisco M. Romero|2016|Dalton Trans.|45|17918|doi:10.1039/C6DT02934E
Anion-Assisted Crystallization of a Novel Type of Rhenium(IV)-Based Salt
2016
A novel rhenium(IV)–manganese(II) double salt of formula (NBu4)10[{ReCl4(ox)}3Mn]2[ReCl6] (1) (NBu4+ = tetra-n-butylammonium cation and ox2– = oxalate dianion) has been prepared through the simultaneous use of two different anionic ReIV complexes, namely, [ReCl4(ox)]2– and [ReCl6]2–, in the presence of MnII ion, the [ReCl6]2– anion playing a key role in the crystallization process. 1 has been magnetically characterized and its crystal structure determined by single-crystal X-ray diffraction. The study of the magnetic properties reveals the occurrence of intramolecular antiferromagnetic exchange between ReIV and MnII ions. Remarkably, 1 is the first reported example of ReIV salt based on two…
2D and 3D bimetallic oxalate-based ferromagnets prepared by insertion of MnIII-salen type complexes
2013
The syntheses, structures and magnetic properties of the compounds of formulae [Mn((R)-salmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH)0.5(CH3CN)1.25 ((R)-1), [Mn((S)-salmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH)0.5(CH3CN)1.25 ((S)-1), [Mn((R)-salmen)(CH3OH)2][MnCr(ox)3](CH2Cl2)0.375(CH3OH)0.125(H2O)0.375 ((R)-2) and [Mn((S)-salmen)(CH3OH)2][MnCr(ox)3](CH2Cl2)0.375(CH3OH)0.375(H2O)0.125 ((S)-2) (ox = oxalate, salmen2− = N,N′-(1-methylethylene)bis(salicylideneiminate)), [Mn(salpn)(CH3OH)1.5(CH3CN)0.5][MnCr(ox)3](CH3OH)0.82(H2O)0.93 (3) (salpn2− = N,N′-(propane)bis(salicylideneiminate)) and [Mn(saltmen)(CH3OH)(CH3CN)][MnCr(ox)3](CH3OH) (4) (saltmen2− = N,N′-(1,1,2,2-tetramethylethylene)bis(salicylideneimi…