Roberto Bianchi

University of Parma

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Caterina Agrimonti

University of Parma

Nelson Marmiroli

University of Parma

Claudio Pugliesi

University of Pisa

Marco Fambrini

University of Pisa

J.R. Santisteban

Bariloche Atomic Centre

C. Brugnoni

Joint Research Centre

Giovanna Visioli

University of Parma

Albert C. Bianchini

Joint Research Centre

M.A. Vicente Álvarez

Bariloche Atomic Centre

A. Gomez

Comisión Nacional de Energía Atómica

Cooperative Institutions

University of Parma

Comisión Nacional de Energía Atómica

Bariloche Atomic Centre

Centro Científico Tecnológico - San Juan

Consejo Nacional de Investigaciones Científicas y Técnicas

Balseiro Institute

Universidad Nacional de Cuyo

Joint Research Centre

University of Bologna

University of Pisa

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Understanding biological conservation strategies: a molecular-genetic approach to the case of myrtle (Myrtus communis L.) in two Italian regions: Sardinia and Calabria

Conservation Genetics (2006)

Caterina Agrimonti Roberto Bianchi Alberto Bianchi Mauro Ballero Ferruccio Poli

Myrtus communis

Outcrossing

Myrtaceae

Genetic Variability

10.1007/s10592-006-9177-y

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Citations (41)

G1-1 and LeG1-1/LeG1-2 genes are involved in meristem activation during breakage of dormancy and early germination in potato tubers and tomato seeds

Plant Science (2007)

Caterina Agrimonti Giovanna Visioli Roberto Bianchi Anna Torelli Nelson Marmiroli

Sprouting

Parenchyma

Plantlet

10.1016/j.plantsci.2007.08.004

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Citations (5)

La storia formattata. Wikipedia tra creazione, uso e consumo

PASSATO E PRESENTE (2017)

Roberto Bianchi Gilda Zazzara

This article offers some reflections on the cultural and epistemological challenges presented to historians and teachers by Wikipedia. The history of Wikipedia is examined via a consideration of the ‘policies’ set out by its founders, and how these fundamental rules can lead to certain contradictions arising during the process of the creation of the individual entries. By taking a series of examples, and by comparing different language versions, the article shows how controversial historiographical issues tend to attract individuals with a penchant for airing their own personal and political views. The purpose of the discussion is not to encourage the jettisoning of this extraordinary tool for the dissemination of knowledge. Instead, we would encourage Wikipedia to be understood as a complex social phenomenon, with its own practices and ideologies, embedded within its own national cultures. In turn, we hope to see more expert input from academics or, at the very least, a more critically aware use of Wikipedia in the future.

Historiography

Phenomenon

10.3280/pass2017-100008

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Citations (2)

Influence of Experimental Test Conditions on the Ni Release of a Cu‐Ni Alloy in Artificial Sweat

C. Brugnoni Roberto Bianchi Albert C. Bianchini M.F. Stroosnijder

Nickel allergy is a problem for an increasing number of persons. In 1994 the European Commission published the "Nickel directive" 94/27/EC that defines the maximum Ni release amount of objects in prolonged contact with skin (0.5 µg/cm2 week). To implement this directive reliable test methods have to be established to check the quality of consumer products. Essential is the selection of the correct experimental test conditions. These include the definition of an artificial solution that simulates natural sweat. Different types of artificial sweat composition are described in the literature. Some test standards are ready, such as EN 1811. In the present study the solution suggested in EN 1811 was taken as a basis. As test material a CuNi25 (wt.%) alloy was chosen because of its use in Euro coinage. The influence of pH and compounds such as urea, lactic acid, ammonia on the corrosion behavior has been investigated using electrochemical methods. The quantitative analysis of Ni release after immersion test was performed by polarography with stripping analysis. Immersion tests were performed according to the EN 1811 procedure. The results support a better understanding of the relevance of various experimental factors on Ni release from materials in contact with artificial sweat.

10.1002/3527606149.ch34

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Citations (7)

A real-world approach to secure and trusted negotiation in MASs

Roberto Bianchi Andrea Fontana Federico Bergenti

The problem of providing tools to support legally valid negotiations between agents is becoming more and more critical. Agents are supposed to perform crucial tasks autonomously; however, they cannot exploit an extensive set of laws since the development of a full legal corpus for the computer world is yet to come. In this work we present an innovative model of interaction between agents that leads to an increase in the level of trust in negotiation-intensive MASs. In particular, we address some common problems related to trust and security in real-world negotiations and outline a set of abstractions that we can use to increase the level of trust that we can expect from agreements with third parties.

Critical mass (sociodynamics)

10.1145/1082473.1082674

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Citations (10)

Influence of casting defects on fatigue crack initiation and fatigue limit of ductile cast iron

Procedia Engineering (2011)

Luca Collini A. Pirondi Roberto Bianchi Matteo Cova Pietro Paolo Milella

In this work the fatigue behaviour of a ferritic ductile iron is experimentally studied on a set of specimens extracted from heavy-duty tile press frames. Specimens are non-standard, with a gage rectangular volume 35mm-wide, 3mm-thick and 160mm-long in order to maximise the volume of material subject to fatigue and the surface/volume ratio, compatibly with testing device in use (Amsler FP 422 axial resonant testing machine), and therefore to promote the crack initiation from a defect. A classical staircase methodology is adopted for the fatigue test. Fracture surfaces are examined post-failure, looking for initiation sites and related features. The fatigue crack propagation is then simulated using FE analysis with the Virtual Crack Closure Technique, starting from the experimentally detected initiation sites and cast defect dimension. In this way, it should be possible to assess whether the fatigue strength of such specimens (and, in turn of large castings) is dominated by the crack propagation phase.

Fatigue limit

10.1016/j.proeng.2011.04.481

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Citations (39)

Morphogenesis in Helianthus Tuberosus: Genotypic Influence and Increased Totipotency in Previously Regenerated Plants

Biologia Plantarum (1999)

Roberto Bianchi Marco Fambrini Claudio Pugliesi

Leaf tissues of 38 genotypes, derived from four accessions, of the hexaploid species Helianthus tuberosus (2n=6x=102) responded to growth regulators (BA, NAA) chiefly by forming callus, while aventitious organogenesis or somatic embryogenesis were induced occasionally. A remarkable regeneration frequency (about 30 %) was achieved only from leaves of genotype HTPI-15. Explants of many regenerated plants of HTPI-15 subjected to a second culture cycle in vitro displayed a high morphogenetic potential (regeneration frequency > 90 %). White globular structures were initiated on the adaxial surface of these leaves without a callus phase. Somatic embryogenesis was asynchronous and embryoids, of different developmental stage, were simultaneously detected on each explant. Although many embryos developed single or malformed cotyledons or germinated precocciously, without the differentiation of a complete root system, phenotypically normal plants were regenerated after rooting on regulator-free half-strength MS medium.

Callus

Organogenesis

Helianthus

10.1023/a:1002698511484

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Citations (7)

Typical Zirconium Alloys Microstructures in Nuclear Components

Practical Metallography (2014)

A. V. Flores A. Gomez G. A. Juarez N. Loureiro R. I. Samper

Abstract The different microstructures typically found in nuclear components made of zirconium alloys are discussed in this paper. These include material in a variety of thermo-mechanical conditions, e. g., cold rolled, stress relieved, recrystallized, welded, biphasic, together with minority second phases belonging to the original material or incorporated due to in-service conditions. The anisotropic crystalline structure of zirconium is exploited in microscopical observations by means of polarizer filters that enhance the contrast between different grains, and greatly aid the identification in most microstructures. Most microstructural variations across a wide range of length-scales, such as those produced by welding processes, can be effectively resolved by traditional optical microscopy (OM). However, some finer microstructures like those found in CANDU 1 (CANada Deuterium Uranium) reactor pressure tube material, or some minority second phase particles like the Zr(Fe, Cr) 2 precipitates in Zircaloy-4 cannot be completely resolved by this technique. Thus, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) are required in such cases. For SEM observations we show the valuable issue of the scale in specific microstructural studies, which allows quantifying microstructural parameters using image analysis. For TEM observations, we have greatly benefited from the electron diffraction diagrams, which have allowed us to investigate the crystalline structure of irradiated second phase particles, which would remain unnoticed to both, OM or SEM observations.

Zirconium alloy

10.3139/147.110304

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Citations (5)

Epiphylly in a Variant ofHelianthus annuus×H. tuberosusInduced byIn VitroTissue Culture

International Journal of Plant Sciences (2000)

Marco Fambrini Giuliano Cionini Roberto Bianchi Claudio Pugliesi

A variant clone (EMB-2) derived by in vitro tissue culture of the interspecific hybrid Helianthus annuus x Helianthus tuberosus shows a particular deviation from the usual pattern of plant development in that it produces, both in vitro and in vivo, epiphyllous embryos and/or shootlike structures. Ectopic structures, which are usually arranged in clusters or rows along preexisting veins, originate asynchronously from epidermal cells of the adaxial surface of the leaf blade. Sometimes embryos and buds are also detected on the adaxial plane of the petioles and at the nodes of the stem. EMB-2 individual plants differ greatly in terms of the timing and extent of phenotypic expression of epiphylly. Leaves precociously affected by ectopic structures show a more drastic alteration in the differentiation process. Growth is arrested, the spongy parenchyma and air spaces are absent, and the mesophyll cells do not enlarge. Excluding the veins and epidermis, the leaves are wholly composed of isodiametric cells that are regularly arranged in parallel rows that have dense cytoplasm and prominent nuclei. Ectopic structures isolated from leaves and cultured in vitro mostly produce plantlets with the same phenotype as the original clones. In vivo, the EMB-2 plants are propagated by tubers. Often, the shoot-meristems that originate from tubers exhibit a teratological appearance and die without further development. However, several normal shoots grow and produce plants that display epiphyllous structures like those of the parent plants. Alterations of the endogenous hormonal levels or mutations in genes involved in the switch from indeterminate to determinate cell fate may be responsible for the ectopic development of shoots and embryos on leaves of EMB-2 variant.

Helianthus annuus

Epidermis (zoology)

Parenchyma

Helianthus

clone (Java method)

Protoplast

10.1086/314235

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Citations (19)