Search results for "LoRa"
showing 10 items of 2828 documents
Ecclesia carinensis. Una sede episcopale alle origini del cristianesimo fra Palermo e Lilibeo; La catacomba paleocristiana di Villagrazia di Carini
2020
The Early Christian cemetery discovered by chance in Villagrazia di Carini in 1899, then forgotten and negletted, has been brought to light from the year 2000 to today thanks to the systematic teamwork of the University of Palermo and the Pontificia Commissione di Archeologia Sacra (PCAS). The unexpected dimension of the site, the largest underground cemetery of Early Christianity so far known in western Sicily, has finally allowed the historiographical debate to find a meeting point on the age-old problem of the existence of ecclesia carinensis, an Early Byzantine diocese attested by the written sources up to the eighth century and disappeared after the centuries of the Islamic domination …
Do soils exist outside Earth?
2010
Abstract On Earth, soils form thanks to the combined action of at least five factors: parent rock, climate, topography, biota, and time. However, the necessity of biota as unavoidable soil forming factor is debated, as important parts of our planet experiencing extreme climates host virtually life-free soils with advanced horizonation. Now that space exploration has greatly expanded our understanding of the Solar System, providing consistent evidences that the loose, unconsolidated "skin" of some nearby rocky bodies is lifeless, it is time to establish if the latter can be considered to be soil in a pedological sense. Our feeling is that, since the concept of soil chiefly bases on the occur…
Low-dimensional copper(II) complexes with the trinucleating ligand 2,4,6-tris(di-2-pyridylamine)-1,3,5-triazine: synthesis, crystal structures, and m…
2010
The preparation and structural characterization of three new copper(II) complexes of formula [Cu(3)(dipyatriz)(2)(H(2)O)(3)](ClO(4))(6) x 2 H(2)O (1), {[Cu(4)(dipyatriz)(2)(H(2)O)(2)(NO(3))(2)(ox)(2)](NO(3))(2) x 2 H(2)O}(n) (2), and [Cu(6)(dipyatriz)(2)(H(2)O)(9)(NO(3))(3)(ox)(3)](NO(3))(3) x 4 H(2)O (3) [dipyatriz = 2,4,6-tris(di-2-pyridylamine)-1,3,5-triazine and ox = oxalate] are reported. The structure of 1 consists of trinuclear units [Cu(3)(dipyatriz)(2)(H(2)O)(3)](6+) and uncoordinated perchlorate anions. The two dipyatriz molecules in 1 act as tris-bidentate ligands with the triazine cores being in a quasi eclipsed conformation. Each copper atom in 1 exhibits a distorted square pyr…
Christian Konrad Sprengel’s Theory of the Flower: The Cradle of Floral Ecology
1996
As the plant taxonomist Karl Suessenguth once wrote, there are two kinds of discoveries: Detecting a thing nobody has seen before, or thinking what no one has thought before about something that everybody sees. A discovery of the second kind, and one of great moments in our science, was Sprengel’s theory of the flower. This theory clearly expressed for the first time the notion that flowers are designed for the transmission of pollen by foreign vectors, that is, animals or wind, and they can be understood only from this perspective.
Contributo alla conoscenza della distribuzione di Monotropa hypophegea Wallr. (Ericaceae) in Italia
2015
The authors report the distribution of Monotropa hypophegea Wallr. in Italy by the analyses of herbarium specimens, bibliographic references and records in the field. Its national distribution is extended to Tuscany, Marche, Umbria, Puglia Basilicata, Calabria and confirmed for Sicily. Some details concerning morphological characters are also provided to avoid confusion in identification with M. hypopitys L. the other congeneric species occurring in Italy. Furthermore, observations about ecology of these taxa are provided.
The Sicilian wild cabbages as biological resources: taxonomic update and a review on chemical constituents and biological activities
2020
Considering the growing interest that wild brassicas have as sources of bioactive molecules as well as a genetic resource, the authors review and update the taxonomy of Brassica sect. Brassica, limited to the native flora of Sicily, an island considered to be an active diversification center for the group of species of the aforementioned section. Regarding the taxonomic aspects, Brassica tardarae is here considered a subspecies of B. rupestris; the distinction at the subspe- cific level of B. raimondoi, a critical taxon included in B. incana, is also confirmed. In addition, two new subspecies are proposed, respectively in B. incana and B. rupestris. The taxonomic information relating to the…
Typification of the name Senecio pygmaeus (Asteraceae), with some additional taxonomic and phytogeographic remarks
2023
A thorough research on the scientific activity of Guglielmo Gasparrini, Giovanni Gussone and Augustin Pyramus De Candolle allowed the authors to adress a research in several European herbaria looking for the type of the name Senecio pygmaeus DC. The original specimen sent by Gussone and mentioned in the protologue by Candolle is still kept at G-DC and is designated as the lectotype, whilst three other herbarium sheets, preserved at NAP-GUSS, PAL and PAV herbaria respectively, in all probability belong to the same gathering, and are considered as isolectotypes. The authors provide an updated description of this taxon in order to better point out its diagnostic characters. However, further bi…
New Data on Native and Alien Vascular Flora of Sicily (Italy): New Findings and Updates
2023
In this paper, based on fieldwork and herbaria surveys, new data concerning the presence of 32 native and alien vascular species for Sicily (Italy) are provided. Among the native species, the occurrence of the following taxa is reported for the first time or confirmed after many decades of non-observation: Aira multiculmis, Arum maculatum, Carex flacca subsp. flacca, Mentha longifolia, Oxybasis chenopodioides, Najas minor and Xiphion junceum. Furthermore, we document the presence of three native species (Cornus mas, Juncus foliosus and Limonium avei) that, despite being repeatedly observed in Sicily and reported in the literature, are inexplicably omitted by the most recent authoritative ch…
Sequence variation and regulatory variation in acetylcholinesterase genes contribute to insecticide resistance in different populations of Leptinotar…
2021
Abstract Although insect herbivores are known to evolve resistance to insecticides through multiple genetic mechanisms, resistance in individual species has been assumed to follow the same mechanism. While both mutations in the target site insensitivity and increased amplification are known to contribute to insecticide resistance, little is known about the degree to which geographic populations of the same species differ at the target site in a response to insecticides. We tested structural (e.g., mutation profiles) and regulatory (e.g., the gene expression of Ldace1 and Ldace2, AChE activity) differences between two populations (Vermont, USA and Belchow, Poland) of the Colorado potato beet…
Exploring Postgraduate Socioeconomics Programs in Spanish-Speaking Countries
2019
Resumen En los últimos años las actividades sin fines de lucro han sido promovidas como un mecanismo alternativo para el desarrollo en el contexto de la situación económica mundial. Sin embargo, a pesar de sus potencialidades, esas actividades continúan siendo relativamente poco expandidas y requieren de ampliar los conocimientos sobre ellas. En este sentido la universidad puede convertirse en un generador y transmisor de saberes sobre el tema de economía social. Por esta razón, se plantea desarrollar un análisis de la oferta de programas de posgrado en Economía Social en las instituciones de educación superior latinoamericanas y españolas. El artículo presenta el proceso y los resultados d…