5,181 research outputs found
[Correspondence Between D. P. D'Angelo and Barbara Jordan - May 1973]
No full textCorrespondence between D. P. D'Angelo and Barbara Jordan where D'Angelo requests that Jordan support a bill that would amend the Railroad Retirement Act and Interstate Commerce Act. Jordan confirms her support of the bill
Screening by coral green fluorescent protein (GFP)-like chromoproteins supports a role in photoprotection of zooxanthellae
No full textGreen fluorescent protein (GFP)-like pigments are responsible for the vivid colouration of many reef-building corals and have been proposed to act as photoprotectants. Their role remains controversial because the functional mechanism has not been elucidated. We provide direct evidence to support a photoprotective role of the non-fluorescent chromoproteins (CPs) that form a biochemically and photophysically distinct group of GFP-like proteins. Based on observations of Acropora nobilis from the Great Barrier Reef, we explored the photoprotective role of CPs by analysing five coral species under controlled conditions. In vitro and in hospite analyses of chlorophyll excitation demonstrate that screening by CPs leads to a reduction in chlorophyll excitation corresponding to the spectral properties of the specific CPs present in the coral tissues. Between 562 and 586 nm, the CPs maximal absorption range, there was an up to 50 % reduction of chlorophyll excitation. The screening was consistent for established and regenerating tissue and amongst symbiont clades A, C and D. Moreover, among two differently pigmented morphs of Acropora valida grown under identical light conditions and hosting subclade type C3 symbionts, high CP expression correlated with reduced photodamage under acute light stress
A proposito di D. 43.17.2 (Paul. 65 ad ed.)
No full textD. 43.17.2 (Paul. 65 ad ed.), in the opinion of Giovanni Nicosia, could be referred to the interdictum de vi rather than, as suggested by Otto Lenel, to the interdictum uti possidetis. According to the author, however, a careful examination of the source supports Lenel’s opinio
Actio ‘in servum (et in familiam) ’ in D. 47.8.4.15 (Ulp. 56 ad ed.) e D. 47.9.1 pr. (Ulp. 56 ad ed.)
No full textThe author deals with the meaning of the statement of an action ‘in servum (et in familiam) ’ in D. 47.8.4.15 (Ulp. 56 ad ed.) and D. 47.9.1 pr. (Ulp. 56 ad ed.). He argues that this formulation was a way to highlight in an elliptical form that the slave was the reference point of the noxal action (with reference both to the causa actionis and to the criterion on which the passive legitimation was based), as follows from the cardinal principle ‘actio noxalis caput sequitur ’
D'Angelo A., Moro, i vescovi e l'apertura a sinistra, Studium, Roma 2005
No full textRecensione al volume: D'Angelo A., Moro, i vescovi e l'apertura a sinistra, Studium, Roma 200
La buona governance. Scelte e strumenti per le imprese non quotate
No full textLa buona governance è ormai un imperativo.
Tuttavia, in concreto, in che cosa consiste e quali sono i suoi benefici? Questo libro risponde a entrambi i quesiti con l’ancoraggio di una base empirica estremamente significativa, data dalla popolazione delle imprese sopra i 50 milioni di euro di fatturato monitorata dal Corporate Governance Lab di SDA Bocconi School of Management. Ne deriva una rappresentazione, per vari aspetti inedita, degli elementi distintivi della buona governance, del suo impatto positivo su strategie e performance e dei percorsi che hanno
condotto le imprese indagate a compiere progressi rilevanti, pur con una strada ancora lunga e impegnativa di fronte a sé. Come percorrerla con successo? Combinando studi, analisi quantitative ed esperienze dirette, il libro propone a imprenditori e imprenditrici e, in generale, a chi ha responsabilità apicali in imprese non quotate, riflessioni e indicazioni su come disegnare la governance corporate
e proprietaria, superare ostacoli e trappole e ricoprire al meglio i ruoli chiave. Un’attenzione speciale è riservata alle imprese familiari ma con uno sguardo anche sulle imprese a controllo di coalizione, finanziario e statale e con testimonianze dei tre operatori partner del Lab. La prospettiva aziendale dei curatori (che hanno scritto introduzione e conclusioni e quattro dei sei capitoli) si combina con quella giuridica grazie a due contributi di autori esperti di diritto societario
Sulla difesa del servo assente da parte del terzo nel processo nossale classico. A proposito di D. 9.4.21.1 (Ulp. 23 ad ed.)
No full textThe paper aims to revise the traditional opinion, based on D. 9.4.21.1 (Ulp. 23 ad ed.), that in the noxal proceeding a non dominus could never defend a slave absent in iure. According to the author no technical reason justifies this opinion and D. 9.4.39.1 (Iul. 9 dig.) contradicts it. Therefore D. 9.4.21.1 should be interpreted in a differet way: a non dominus could defend a slave absent in iure by giving a positive answer to the interrogatio ‘an servus in potestate eius sit’; otherwise he would have to produce the slave in court, if in possession of him, in order to allow the claimant the ductio
Towards the detection of low energy solar neutrinos in Borexino : data readout, data reconstruction and background identification [Doctoral thesis]
No full textNew challenging questions in astro-particle physics are opened with the discovery of neu- trino mass and mixing. Low energy solar neutrino spectroscopy plays now a fundamental role in understanding the new physics and the nuclear fusion processes in the sun. A large scale scintillation detector borexino at the Gran Sasso Laboratories (Italy) will soon pursue this goal in real time. In this work, a custom data acquisition system (electronics and software) has been developed together with the offline data processing algorithms. A water Cˇerenkov detector has been installed for cosmogenic background identification, including the tagging of 11C in the energy window of pep neutrinos. With a prototype detector, the in-situ 11C production rate was measured for the first time, resulting in 0.135 ± 0.024[stat] ± 0.014[syst]/d/ton. The detection of the weak spectral contribution of pep neutrinos in borexino was shown to be realistic and will determine uniquely the fundamental solar pp fusion rate
LONG-TERM PLASTICITY CHAINS IN THE CEREBELLAR CORTEX
No full textThe sites and mechanisms of long-term synaptic plasticity (LTP and LTD) in the cerebellar cortex are object of debate. What is apparently lacking is a determination of the plastic changes occurring when the whole circuit is engaged. In this way, LTP and LTD may occur at multiple sites as well as in the intrinsic excitable mechanisms of these same neurons. In particular, we have tested the impact of theta burst stimulation (TBS) delivered to the mossy fibers (Mapelli and D'Angelo, 2007).Voltage-Sensitive Dye (VSD) imaging on rat cerebellar slices showed various areas of plasticity following TBS, with a remarkable prevalence of LTD in the granular layer and of LTP in the Purkinje cell layer. At the same time, firing changes were monitored in Purkinje cells (PCs) and molecular layer interneurons (MLIs) using paired loose cell-attached (n=5) and whole-cell recordings (n=5). The PCs showed enhanced probability of response and enhanced time precision with reduced first spike delay. This could be due either to a secondary reduction of MLIs activity (which showed depression of response in the majority of cases) or to enhanced parallel fiber – Purkinje cells transmission, or both. While these mechanistic hypotheses are currently under investigation, these results already indicate that afferent patterns cause distributed plasticity in the network suggesting that chains of changes are the salient aspect to be considered in order to interpret the processes of cerebellar learning
Seasonal modulation in the Borexino cosmic muon signal
No full textBorexino is an organic liquid scintillator detector located in the underground Gran Sasso National Laboratory
(Italy). It is devoted mainly to the real time spectroscopy of low energy solar neutrinos via the elastic scattering on
electrons in the target mass. The data taking campaign started in 2007 and led to key measurements of 7Be and 8B
solar neutrinos as well as antineutrinos from the earth (geo-neutrinos) and from nuclear power reactors. Borexino is
also a powerful tool for the study of cosmic muons that penetrate the Gran Sasso rock coverage and thereby induced
signals such as neutrons and radioactive isotopes which are today of critical importance for upcoming dark matter and
neutrino physics experiments. Having reached 4y of continuous data taking we analyze here the muon signal and its
possible modulation. The muon flux is measured to be (3.41 ± 0.01)· 10−4m−2s
−1. A modulation of this signal with
a yearly period is observed with an amplitude of (1.29±0.07)% and a phase of (179±6) d, corresponding to June 28th.
Muon rate fluctuations are compared to fluctuations in the atmospheric temperature on a daily base, exploiting the most
complete atmospheric data and models available. The distributions are shown to be positively correlated and the effective
temperature coefficient is measured to be αT = 0.93 ± 0.04. This result is in good agreement with the expectations of
the kaon-inclusive model at the laboratory site and represents an improvement over previous measurements performed at
the same depth
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