22 research outputs found
I Samaritani nel contesto storico, geografico e religioso
No full textIl termine „Samaritani” deriva dal verbo ebraico šāmar “vigilare”, „custodire”. Gli Assiri, dopo aver conquistato la capitale Samaria (722) deportarono circa 40 mila Israeliti in Mesopotamia i quali conservarono la tradizione dei profeti del Regno del Nord: Elia, Eliseo, Amos ed Osea. Nella regione di Samaria rimasero circa 100 mila Israeliti, ma vi arrivarono molti altri popoli dalla Siria, Assiria, Persia, Media e dal mondo ellenistico. Così si formò una comunità assai composita che adottò un rito speciale.
Dopo il periodo di deportazione (di esilio), quando i rimpatriati Giudei si dedicarono al rinnovamento del culto e alla ricostruzione del tempio di Gerusalemme, i Samaritani espressero il desiderio di parteciparvi. Ma il loro desiderio fu respinto dai rimpatriati. Allora i Samaritani, per ragioni politiche, si opposero alla ricostruzione delle mura di Gerusalemme e costruirono un proprio tempio sul monte Garizim (328) che fu distrutto da Giovanni Ircano (128), procurando una profonda spaccatura tra Giudei e Samaritani.
Spesso si parla di „scisma dei Samaritani”. In realtà si tratta piuttosto di due correnti religiose, basate sul Pentateuco. I Samaritani sono monoteisti, considerano Mosè come un profeta, indirizzano le preghiere a Dio tramite i patriarchi e Mosè, accettano il Pentateuco, considerano il monte Garizim come un luogo santo, hanno il proprio calendario liturgico e riti religiosi.
Gesù non predicò la buona novella ai Samaritani (non si trovano tracce nella fonte Q e in Marco). I due evangelisti testimoniano che Gesù non era contro i Samaritani (vedi la parabola del buon Samaritano – Luca 10,30-35 ed il colloquio con la Samaritana – Giov. 4,4-42). I discepoli di Gesù ben presto, con un notevole successo, cominciarono a predicare il messaggio del loro Maestro ai Samaritani (cf. Atti 8,1-6)
Endoscopic-assisted non surgical periodontal therapy: radiographic evaluation of infrabony defect response. A pilot study.
No full textThe goal of non surgical therapy is to remove subgingival biofilm and a minimally invasive endoscopic treatment of subgingival areas allows a significant improvement of deposits removal.
The aim of this study is to analyze the radiographic response of infrabony defects after non surgical periodontal therapy performed with a periodontal endoscope.
Twenty-three sites, belonging to 13 patients (7 females and 6 males, mean ± SD = 50±11 years), were analyzed after endoscopic-assisted* non surgical periodontal therapy. All patients were affected by chronic periodontitis, with moderate (probing depth – PD: 5-6 mm) or deep (PD:≥7mm) pockets and vertical infrabony defects affecting single – rooted teeth.
All sites were treated with endoscopic-assisted scaling and root planing (S-RP) and standardized x-rays were taken before and one year after the treatment. Radiographs were scanned and evaluated using an image analyzer.
The following measurements were taken: the distance between interproximal cementoenamel junction (CEJ) and base of the defect (BD), the distance between bone crest (BC) and BD, the angle of the defect and the Infrabony Defect Fill (IDF) (measured as the difference between initial and final vertical distance from CEJ to BD).
Results, one year after the procedure, show a statistically significant (p=0.0001) mean reduction of CEJ-BD and BC-BD distances, respectively 1.13 (0.68-1.59) mm and 0.82 (0.42-1.22) mm, and a statistically significant (p=0.03) mean increase of the defect angle: 6.29 mm (0.67-11.92). Moreover, the mean value of IDF fill was 1.14 ± 0.22 mm, denoting an infrabony defect fill.
Bone remodeling, occurred after non surgical endoscopic-assisted periodontal therapy, led to a partial fill of the defect and an increase of the defect angle, due to a remineralization of the most apical part of the defect. Taking advantage of the regenerative potential present in the area, the vertical defect partially turned into a horizontal defect.
This procedure brings predictable improvements in the radiographic parameters of infrabony defects versus S-RP alone.
Periodontal endoscopic-assisted non surgical therapy achieves a statistically significant decrease of the vertical component of the bony defects and the opening of the defect angle.
This procedure seems to be a reliable treatment for patients with a medical history or other psychological/economical concerns limiting a surgical approach
Partial and exhaustive hydrolysis of lanthanide N,N-dialkylcarbamato complexes. A viable access to lanthanide mixed oxides
No full textPartial hydrolysis (H2O/Ln molar ratio = 1⁄4) of lanthanum di-iso-propylcarbamato complex,
[La(O2CNiPr2)3], 1, afforded the tetranuclear μ-oxo derivative [La4O(O2CNiPr2)10], 2, which
was structurally characterized by single crystal X-Ray diffraction studies. The carbonatocarbamato
derivative of lanthanum, [La4(CO3)(O2CNBu2)10], 3, was prepared by extraction of
lanthanum ions from aqueous solution into heptane by the NHBu2/CO2 system. Partial
hydrolysis (H2O/Ln molar ratio = 1⁄2 ) of N,N-di-iso-propylcarbamato complexes of
neodymium, europium, gadolinium and terbium, [Ln(O2CNiPr2)3], yielded the derivatives
[Ln2(CO3)(O2CNiPr2)4] (Ln = Nd, 4, Eu, 5, Gd, 6). Exhaustive hydrolysis of [Ln(O2CNR2)3]
(Ln = Nd, Tb, R = Bu; Ln = Eu, Gd, R = iPr, Bu) produced hydrated lanthanide carbonates,
Ln2(CO3)3 n H2O. For sake of comparison with a block d metal, the exhaustive hydrolysis of
two copper(II) carbamato complexes, [Cu(O2CNEt2)2(NHEt2)]2 and [Cu(O2CNiPr2)2], was
carried out with formation in both cases of the hydrated basic carbonate
Cu2(OH)2(CO3)nH2O. The exhaustive hydrolysis of mixtures of cerium and lanthanum or
cerium and terbium N,N-dibutylcarbamato complexes allowed the preparation of mixed
oxides containing the two metals in the desired molar ratio, via the intermediate formation of
the corresponding mixed carbonates
Mononuclear Rare-Earth Metalloligands Exploiting a Divergent Ligand
No full textRare-earth tris-diketonato [RE(dike)(3)pyterpy] metalloligands can be prepared reacting at room temperature [RE(dike)(3)dme] (dme = 1,2-dimethoxyethane; dike = tta with Htta = 2-thenoyltrifluoroacetone and RE = La, 1; Y, 2; Eu, 3; Dy, 4; or dike = hfac with Hhfac hexafluoroacetylacetone, and RE = Eu, 5; Tb, 6; Yb 7) with 4 '-(4 & tprime;-pyridil)-2,2 ':6 ',2 ''-terpyridine (pyterpy). The molecular structures of 1, 5, 6, and 7 have been studied through single-crystal X-ray diffraction showing mononuclear neutral complexes with the rare-earth ion in coordination number nine and with a muffin-like coordination geometry. [RE(tta)(3)pyterpy] promptly reacts with [M(tta)(2)dme] with formation of [Mpyterpy(2)][RE(tta)(4)](2) (M = Zn, RE = Y, 8; M = Co, RE = Dy, 9). Consistently, [Zn(hfac)(2)dme] reacts at room temperature with 2 equiv of pyterpy yielding [Znpyterpy(2)][hfac](2) 10 that easily can be transformed by reaction with 2 equiv of [Eu(hfac)(3)] in [Znpyterpy(2)][Eu(hfac)(4)](2) 11 that has been structurally characterized. Finally, 1, 2, 3, 5, and 7 metalloligands react at room temperature in few minutes with [PtCl(mu-Cl)PPh3](2) yielding the heterometallic molecular complexes [RE(dike)(3)pyterpyPtCl(2)PPh(3)] (dike = tta, RE = La, 12; Y, 13; Eu; 14; dike = hfac, RE = Eu, 15; Yb, 16)
Fragility and glass transition temperature in the rheological response of azobenzene copolymers
No full textTwo copolymers containing nonmesogenic methyl methacrylate (MMA) and nematogenic azobenzene methacrylate (MA4) side groups (30/70 and 40/60 copolymers) azobenzene were studied in the linear viscoelastic regime. The time-temperature superposition principle was found to hold over the whole investigated temperature range, even across the nematic-isotropic transition in the 30/70 copolymer. Rheological steady state and oscillatory measurements were used to obtain the temperature dependence of the zero shear viscosity. The strength and dynamic fragility of these two copolymers were compared with those of the corresponding PMA4 and PMMA homopolymers, which pointed out the role of the structure of the main chain in dictating the relaxational dynamics
Assessment of Driver Behavior Based on Machine Learning Approaches in a Social Gaming Scenario
No full textThe estimation of user performance analytics in the area of car driver performance was carried out in this paper. The main focus relies on the descriptive analysis with our approaches emphasizing on educational serious games, in order to improvise the driver’s behavior (specifically green driving) in a pleasant and challenging way. We also propose a general Internet of the Things (IoT) social gaming platform (SGP) concept that could be adaptable and deployable to any kind of application domain. The social gaming scenario in this application enables the users to compete with peers based on their physical location. The efficient drivers will be awarded with virtual coins and gained virtual coins can be used in real world applications (such as purchasing travel tickets, reservation of parking lots, etc.). This research work is part of TEAM project co-funded within the EU FP7 ICT research program
Dibromo–Isonitrile and N-acyclic Carbene Complexes of Platinum(II): Synthesis and Reactivity
No full textA series of dibromo-N-acyclic (NAC) carbene complexes of platinum(II) were synthesized, starting from trans-[Pt(μ-Br)Br(PPh3)]2 and according to a protocol previously optimized for the preparation of analogous chlorinated compounds. In the first step of the synthesis, the ring opening of the dinuclear precursor was carried out using suitable isonitrile ligands, while the following step consisted of the addition of N,N-diethylamine to the products obtained in the first step. The two reactions were separately investigated, and attention was given to the differences between brominated and chlorinated systems
A convenient preparation of La2CuO4 from molecular precursors
No full textExhaustive hydrolysis of a mixture of [La4(CO3)(O2CNBu2)10] and [Cu(O2CNBu2)(py∗)2] (py∗ = 4-dimethylamino pyridine) in molar ratio 1/2 corresponding to a La/Cu molar ratio 2/1 was carried out in toluene at room temperature. The carbamato derivatives of lanthanum and copper can be easily prepared by extraction of the metal ions from aqueous solution into heptane by the NHBu2/CO2 system, according to a method previously reported. The copper precursor was selected among a number of derivatives in respect of its easy tractability. The tetragonal modification T’ of La2CuO4 was obtained by treatment at 600 °C of the intermediate mixed carbonate. The thermal treatment of T’-La2CuO4 at 850 °C, followed by cooling down to room temperature, afforded the orthorhombic modification of the mixed oxide
Tumor necrosis factor/a and trasforming growth/b are significantly associated with better prognosisi in non small cell lung carcinoma: putative relation with bcl-32-mediated neovascularization
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