70 research outputs found
Ibn Zurʿa on Intellect. A Study and an Annotated Translation of Treatise no. 4 Sbath
No full textThe article provides a study and an annotated translation of an Arabic treatise on the trinity and the intellect by the West-Syriac Christian theologian Ibn Zurʿa (d. 1008 AD). The preliminary study examines the sources bearing witness to Ibn Zurʿa’s interest in the study of soul and intellect; it also discusses a text by Ibn Zurʿa in which he mentions Plato (echoing the Phaedo) and Aristotle’s De anima as philosoph-ical authorities who proved the immortality of the soul. The article then analyzes structure, attribution, and doctrinal contents of Ibn Zurʿa’s treatise, highlighting its links to the thought and works of Ibn Zurʿa’s teacher, Yaḥyà b. ʿAdī (d. 974 AD). The English translation is based on a revision of Sbath’s edition through a collation of the manuscripts available to the author of the article
Genetic transformation and regeneration of transgenic plants in grapevine (Vitis rupestris S.)
No full textsolated somatic embryos from petiole-derived callus cultures ofVitis rupestris Scheele have been employed in experiments on genetic transformation. Co-cultivation of somatic embryos during embryogenesis induction withAgrobacterium tumefaciens strain LBA4404, which contains the plasmid pBI121 carrying the neomycin phosphotranspherase and theβ-glucuronidase genes, produced transformed cellular lines capable of recurrent somatic embryogenesis. Precocious selection for high levels of kanamycin (100 mgl-1) was an important part of our transformation protocol. Transformed lines still have strongβ-glucuronidase expression as well as stable insertion of the marker genes after 3 years of in-vitro culture, during which they have maintained their capacity to organize secondary embryos and to regenerate transgenic plants with an agreeable efficiency (13%
Incontri con il mandolino alla Pietà de' Turchini
No full text“Il mandolino a Napoli nel Settecento”
Conversazioni con:
Francesco Nocerino, musicologo e organologia
Ugo Orlandi, Conservatorio G. Verdi di Milano
Mauro Squillante, Conservatorio G. Martucci di Salerno
Introduce:
Mariafederica Castaldo, Fondazione Pietà de’ Turchini
Coordinano:
Anna Rita Addessi, Alma Mater Studiorum-Università di Bologna
Paologiovanni Maione, Conservatorio S. Pietro a Majella di Napoli
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OXIDATION OF EXTERNAL NAD(P)H BY MITOCHONDRIA FROM TAPROOTS AND TISSUE-CULTURES OF SUGAR-BEET (BETA-VULGARIS)
No full textThe present study compares the exogenous NAD(P)H oxidation
and the membrane potential (A of mitochondria from
cold-stored taproots and from tissue cultures was not affected by
free Caz+ ions, whereas free CaZ+ was required for the mitochondrial
NADPH oxidation by in vitro-grown cells and cytosolic NADH
oxidation by mitochondria from fresh taproots. A tentative model
accounting for the different response to Caz+ ions of the NADH
dehydrogenase in mitochondria from cold-stored taproots and
tissue cultures of B. vulgaris is discussed
L’Isagoge di Porfirio e la sua ricezione tardoantica e medievale. XII Settimana di Formazione GrAL
No full textEffects of gamma-ray treatment on Cannabis sativa pollen viability
No full textThe viability and the in vitro germination capability of hemp pollen (cv. Carmagnola) were studied. Viability tests
were based on the microscopic observation of the fluorescence of loaded fluorescein diacetate (FDA), while, for
germinability tests, five different media were tested. The effects of irradiation with 7-rays on pollen viability and
germination and on seed set were also studied, at three different irradiation doses (20, 60 and 100 krad). The results
show that in one of the media tested, about 85-90% of the pollen grains are viable and able to germinate in control
samples, and that while viability measured by FDA test is not affected by increased 7-ray doses, the pollen in vitro
germinability drops to about one-half of the controls at the maximum "y-ray dose employed, 100 krad. Seed set of
hemp plants pollinated with the irradiated pollen dropped to less than 1% of that of plants pollinated by untreated
pollen for the higher dose used. The different media suitable for in vitro germination of hemp pollen, and the
observed lack of correspondence between viability and germination capacity tests are discussed
A hybrid dynamical modeling framework for shape memory alloy wire actuated structures
No full textIn this letter, a hybrid model for single-crystal Shape Memory Alloy (SMA) wire actuators is presented. The result is based on a mathematical reformulation of the Müller-Achenbach-Seelecke (MAS) model, which provides an accurate and interconnection-oriented description of the SMA hysteretic response. The strong nonlinearity and high numerical stiffness of the MAS model, however hinder its practical use for simulation and control of complex SMA-driven systems. The main idea behind the hybrid reformulation is based on dividing the mechanical hysteresis of the SMA into five operating modes, each one representing a different physical state of the material. By properly deriving the switching conditions among those modes in a physically-consistent way, the MAS model is effectively reformulated within a hybrid dynamical setting. The main advantage of the hybrid reformulation is the possibility of describing the material dynamics with a simplified set of state equations while maintaining all benefits of the physics-based description offered by the MAS model. After describing the novel approach, simulation studies are conducted on a flexible robotic module actuated by protagonist-antagonist SMA wires. Through comparative numerical analysis, it is shown how the hybrid model provides the same accuracy as the MAS model while saving up to 80% of the simulation time. Moreover, the new modeling framework opens up the possibility of addressing SMA control from a hybrid systems perspective
Low temperature effect on housekeeping and sucrose synthase genes expression in sugar beet
No full textAn integrated approach using advanced bioinformatics tools and targeted gene expression analysis was carried out to evaluate the potential use of seven “housekeeping” genes, commonly employed as internal controls in real-time PCR analysis. Adequate testing of reference gene consistency, is always necessary to validate data from any new experimental conditions, since a unique “housekeeping” suitable for every species, organ, developmental stage and treatment does not exist. Thus, the expression stability of glyceraldehyde-3-phosphate dehydrogenase, elongation factor 1_, actin 11, beta-6 tubulin, polyubiquitin 10, 18S rRNA and 5S rRNA genes were evaluated after exposure to low temperatures and in different organs of Beta vulgaris ssp. vulgaris plantlets. The cDNA sequences were derived from GenBank (NCBI) and TIGR-BvGI (Beta Vulgaris Gene Index), a platform providing high-fidelity tentative consensus (TC), obtained by a reliable and stringent ESTs analysis
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