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Malara G, Trifirò C, Bartolotta A, Giofré C, D'Arrigo G, Testa A, De Lorenzo A, Tripepi G. Real-world effectiveness and safety of Guselkumab for the treatment of psoriasis: a 6-month prospective study in a series of psoriatic patients. Eur Rev Med Pharmacol Sci 2021; 25:406-412. [PMID: 33506930 DOI: 10.26355/eurrev_202101_24408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Guselkumab is a fully human monoclonal IgG1 antibody which, by selectively binding to the p19 subunit of IL-23, prevents it from binding to the IL-23 receptor on the cell surfaces. To date, no prospective data are available on the efficacy and safety of this drug in everyday clinical practice in patients with psoriasis (PSO). MATERIALS AND METHODS This is a longitudinal, single arm, real-world, prospective study to investigate the effect of Guselkumab on PSO and quality of life (DLQI) in 44 PSO patients. Outcomes were PASI, BSA, DLQI at 3 and 6 months. RESULTS The longitudinal analysis showed that PASI improved from a median value of 24.1 at baseline to 2.0 at 6-months and this was also true for BSA (from 23.0 to 2.0) and DLQI (from 24.0 to 2.5) (all p<0.001). At 6-months, PASI75, PASI90 and PASI100 were 95.5%, 59.1% and 16%, respectively. The PSO improvement related with the increase of DLQI (∆PASI vs. ∆DLQI, r=0.77, p<0.001). No clinically relevant adverse events were observed. CONCLUSIONS This study demonstrates the effectiveness and safety of Guselkumab on PSO in real world and shows that the reduction of PSO severity due to the drug is directly related with the improvement of quality of life in this patient population.
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Affiliation(s)
- G Malara
- Dermatology Unit, Grande Ospedale Metropolitano "Bianchi-Melacrino-Morelli" of Reggio Calabria, Italy.
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Marrale M, Longo A, Spanò M, Bartolotta A, D'Oca MC, Brai M. Sensitivity of Alanine Dosimeters with Gadolinium Exposed to 6 MV Photons at Clinical Doses. Radiat Res 2011; 176:821-6. [DOI: 10.1667/rr2256.1] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bartolotta A, Brai M, Caputo V, D’Oca M, Longo A, Marrale M. Thermoluminescence response of sodalime glass irradiated with photon and electron beams in the 1–20 Gy range. RADIAT MEAS 2011. [DOI: 10.1016/j.radmeas.2011.03.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Fontana A, Rossi F, Armellini C, Dangelo G, Tripodo G, Bartolotta A. Low-temperature optical and thermal properties of AgI-based phosphate glasses. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/13642819908223096] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Fontana
- a Dipartimento di Fisica and Istituto Nazionale per la Fisica delia Materia , Università di Trento , I-38050 , Povo , Trento , Italy
| | - F. Rossi
- a Dipartimento di Fisica and Istituto Nazionale per la Fisica delia Materia , Università di Trento , I-38050 , Povo , Trento , Italy
| | - C. Armellini
- b Consiglio Nazionale delie Ricerche, Centro Fisica Stati Aggregati , Via Sommarive 14, 1-38050 , Povo , Trento , Italy
| | - G. Dangelo
- c Dipartimento di Fisica and Istituto Nazionale par la Fisica delia Materia , Università di Messina , I-98166 , Sant Agata , Messina , Italy
| | - G. Tripodo
- c Dipartimento di Fisica and Istituto Nazionale par la Fisica delia Materia , Università di Messina , I-98166 , Sant Agata , Messina , Italy
| | - A. Bartolotta
- d Istituto di Tecniche Spettroscopiche del Consiglio Nazionale delie Richerche , Via La Farina, I-98122 , Messina , Italy
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D’Oca M, Bartolotta A, Cammilleri M, Giuffrida S, Parlato A, Di Noto A, Caracappa S. The gas chromatography/mass spectrometry can be used for dose estimation in irradiated pork. Radiat Phys Chem Oxf Engl 1993 2009. [DOI: 10.1016/j.radphyschem.2009.03.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Marrale M, Gennaro G, Brai M, Basile S, Bartolotta A, D’Oca M. Exposure of -alanine and -ammonium tartrate ESR dosimeters to thermal neutrons: Experiments and Monte Carlo simulations. RADIAT MEAS 2008. [DOI: 10.1016/j.radmeas.2007.11.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Brai M, Marrale M, Gennaro G, Bartolotta A, D'Oca MC, Rosi G. Improvement of ESR dosimetry for thermal neutron beams through the addition of gadolinium. Phys Med Biol 2007; 52:5219-30. [PMID: 17762082 DOI: 10.1088/0031-9155/52/17/008] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this paper, the addition of gadolinium is proposed as a useful tool to enhance the electron spin resonance (ESR) sensitivity of organic compounds to thermal neutrons. The target of this work is the detection, through the ESR technique, of the thermal neutron fluence in a mixed field of photons and neutrons. Gadolinium was chosen because it has a very high capture cross section to thermal neutrons; its nuclear reaction with thermal neutrons induces complex inner shell transitions that generate, besides other particles, Auger electrons, which in turn release their energy in the neighborhood (only several nanometers) of the place of reaction. Gadolinium was added to two organic molecules: alanine and ammonium tartrate. The main result obtained was a greater neutron sensitivity for dosimeters with gadolinium than for those without gadolinium for both organic molecules used. Since a dosimeter pair is required to discriminate between the two components of a mixed field, we studied the response of each dosimeter pair irradiated in a mixed field. Through a blind test we verified the usefulness of this dosimetric system and we obtained an estimate of the fluence in the mixed field with a relative uncertainty of 3%, when the pair composed of an alanine dosimeter and a dosimeter with alanine and gadolinium is used.
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Affiliation(s)
- M Brai
- Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy
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Parlato A, Calderaro E, Bartolotta A, D’Oca M, Brai M, Marrale M, Tranchina L. Application of the ESR spectroscopy to estimate the original dose in irradiated chicken bone. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2007.02.053] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Parlato A, Calderaro E, Bartolotta A, D’Oca M, Giuffrida S, Brai M, Tranchina L, Agozzino P, Avellone G, Ferrugia M, Di Noto A, Caracappa S. Gas chromatographic/mass spectrometric and microbiological analyses on irradiated chicken. Radiat Phys Chem Oxf Engl 1993 2007. [DOI: 10.1016/j.radphyschem.2007.02.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Marrale M, Brai M, Gennaro G, Triolo A, Bartolotta A. Improvement of the LET sensitivity in ESR dosimetry for -photons and thermal neutrons through gadolinium addition. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.05.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Grigoryeva O, Slisenko O, Lebedev E, Bartolotta A, Carini G, Carini G, D'Angelo G, Tripodo G. Effect of Blending on the Structure of Thermoplastic Interpenetrating Polymer Networks. J MACROMOL SCI B 2007. [DOI: 10.1080/00222340601036769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- O. Grigoryeva
- a Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine , Kyiv, Ukraine
| | - O. Slisenko
- a Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine , Kyiv, Ukraine
| | - E. Lebedev
- a Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine , Kyiv, Ukraine
| | - A. Bartolotta
- b C. N. R., Istituto per i Processi Chimico‐Fisici, sez. di Messina. , Messina, Italy
| | - Giovanni Carini
- c Dipartimento di Fisica , Universita' di Messina , S. Agata, (ME), Italy
| | - Giuseppe Carini
- c Dipartimento di Fisica , Universita' di Messina , S. Agata, (ME), Italy
| | - G. D'Angelo
- c Dipartimento di Fisica , Universita' di Messina , S. Agata, (ME), Italy
| | - G. Tripodo
- c Dipartimento di Fisica , Universita' di Messina , S. Agata, (ME), Italy
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Brai M, Gennaro G, Marrale M, Bartolotta A, D'Oca MC. ESR response to γ-rays of alanine pellets containing B(OH)3 or Gd2O3. Appl Radiat Isot 2007; 65:435-9. [PMID: 17158056 DOI: 10.1016/j.apradiso.2006.10.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 10/17/2006] [Accepted: 10/29/2006] [Indexed: 11/30/2022]
Abstract
ESR response to gamma-irradiation (1-50 Gy) of blends containing alanine and either B(OH)(3) or Gd(2)O(3) is reported. The sensitivity of the alanine--B(OH)(3) blend is comparable to the sensitivity of pure alanine, although its lowest detectable dose, LDD, is smaller ( approximately 1.3 Gy) than that of pure alanine ( approximately 2.9 Gy). Alanine with Gd(2)O(3) is about two times more sensitive than pure alanine, and its LDD is 0.8 Gy. The better sensitivity and LDD are probably due to the high atomic number (Z=64) of gadolinium, which enhances the interaction probability with photons and, consequently, the radical yield. This study suggests that other high-Z atoms may be useful for increasing the sensitivity of the response of alanine to gamma-radiation.
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Affiliation(s)
- M Brai
- Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy; Unità CNISM, Palermo and Gruppo V Sezione INFN, Catania
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Brai M, Gennaro G, Marrale M, Tranchina L, Bartolotta A, D’Oca M. ESR response to 60Co-rays of ammonium tartrate pellets using as additive. RADIAT MEAS 2007. [DOI: 10.1016/j.radmeas.2007.01.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
The glow curves of thermoluminescent dosimeters (TLD600, TLD700 and MCP), exposed to a mixed field of thermal neutrons and gamma photons are analysed. The fluence values of thermal neutrons used, comparable with those used in radiotherapy, allow one to define the reliability of the TLDs, in particular the most sensitive MCP, in this radiation field and to get information on the dose absorbed values. The glow curves obtained have been deconvoluted using general order kinetics and the observed differences for the different LET components have been analysed. In particular, the ratio of the n(0) parameter of two different peaks seems to allow to discriminate the different contributions of neutrons and gamma photons in the beam.
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Affiliation(s)
- A Triolo
- Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Italy.
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Marrale M, Brai M, Gennaro G, Triolo A, Bartolotta A, D'Oca MC, Rosi G. Alanine blends for ESR measurements of thermal neutron fluence in a mixed radiation field. Radiat Prot Dosimetry 2007; 126:631-5. [PMID: 17517673 DOI: 10.1093/rpd/ncm128] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In this paper, the results of a study on the electron spin resonance (ESR) dosimetry to measure thermal neutron fluence in a mixed radiation field (neutron and photons) are presented. The ESR responses of alanine dosemeters with different additives are compared. In particular, the (10)B-acid boric and the Gd-oxide were chosen to enhance the sensitivity of alanine dosemeters to thermal neutrons. Irradiations were carried out inside the thermal column of the TAPIRO reactor of the ENEA center, Casaccia Rome. The main results are a greater neutron sensitivity and a smaller lowest detectable fluence for the dosemeters with gadolinium than for dosemeters of alanine with (10)B, which is well known to be much more sensitive to thermal neutrons than simple alanine.
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Affiliation(s)
- M Marrale
- Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy.
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Tranchina L, Miccichè S, Bartolotta A, Brai M, Mantegna RN. Posidonia oceanica as a historical monitor device of lead concentration in marine environment. Environ Sci Technol 2005; 39:3006-12. [PMID: 15926545 DOI: 10.1021/es048870u] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We show that Posidonia oceanica is able to reliably monitor the variability of environmental lead (Pb). We analyze lead concentration measured in the scales and rhizomes of Posidonia oceanica collected in seven sites along the coasts of the Sicily island and subsequently fractioned them according to a lepidochronological analysis. We measure lead concentration in Posidonia oceanica tissues by using the flame atomic absorption spectrophotometry technique. We compare the measured lead concentration with the estimated lead emission in air due to the gasoline sold and used for combustion in car engines in Sicily. By computation of the Pearson cross-correlation coefficient, we show that lead concentration, which is measured in the scales of Posidonia oceanica, is statistically correlated to lead emission in air and reflects the level of lead pollution in the coastal marine environment.
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Affiliation(s)
- L Tranchina
- Dipartimento di Fisica e Tecnologie Relative, Università degli Studi di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo, Italy.
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Bartolotta A, D'Oca M, Campisi M, De Caro V, Giandalia G, Giannola L, Brai M, Calderaro E. Effects of gamma-irradiation on trehalose–hydroxyethylcellulose microspheres loaded with vancomycin. Eur J Pharm Biopharm 2005; 59:139-46. [DOI: 10.1016/j.ejpb.2004.06.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2003] [Revised: 06/21/2004] [Accepted: 06/21/2004] [Indexed: 11/15/2022]
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Trompier F, Fattibene P, Tikunov D, Bartolotta A, Carosi A, Doca MC. EPR dosimetry in a mixed neutron and gamma radiation field. Radiat Prot Dosimetry 2004; 110:437-442. [PMID: 15353687 DOI: 10.1093/rpd/nch225] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Suitability of Electron Paramagnetic Resonance (EPR) spectroscopy for criticality dosimetry was evaluated for tooth enamel, mannose and alanine pellets during the 'international intercomparison of criticality dosimetry techniques' at the SILENE reactor held in Valduc in June 2002, France. These three materials were irradiated in neutron and gamma-ray fields of various relative intensities and spectral distributions in order to evaluate their neutron sensitivity. The neutron response was found to be around 10% for tooth enamel, 45% for mannose and between 40 and 90% for alanine pellets according their type. According to the IAEA recommendations on the early estimate of criticality accident absorbed dose, analyzed results show the EPR potentiality and complementarity with regular criticality techniques.
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Affiliation(s)
- F Trompier
- Institute for Radiological Protection and Nuclear Safety, F-92262 Fontenay aux Roses, France.
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Bartolotta A, D'Oca MC, Lo Giudice B, Brai M, Borio R, Forini N, Salvadori P, Manera S. Combined TL and 10B-alanine ESR dosimetry for BNCT. Radiat Prot Dosimetry 2004; 110:627-630. [PMID: 15353720 DOI: 10.1093/rpd/nch110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The dosimetric technique described in this paper is based on electron spin resonance (ESR) detectors using an alanine-boric compound acid enriched with (10)B, and beryllium oxide thermoluminescent (TL) detectors; with this combined dosimetry, it is possible to discriminate the doses due to thermal neutrons and gamma radiation in a mixed field. Irradiations were carried out inside the thermal column of a TRIGA MARK II water-pool-type research nuclear reactor, also used for Boron Neutron Capture therapy (BNCT) applications, with thermal neutron fluence from 10(9) to 10(14) nth cm(-2). The ESR dosemeters using the alanine-boron compound indicated ESR signals about 30-fold stronger than those using only alanine. Moreover, a negligible correction for the gamma contribution, measured with TL detectors, almost insensitive to thermal neutrons, was necessary. Therefore, a simultaneous analysis of our TL and ESR detectors allows discrimination between thermal neutron and gamma doses, as required in BNCT.
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Affiliation(s)
- A Bartolotta
- Dipartimento Farmacochimico Tossicologico e Biologico, Università di Palermo and INFN (Sezione di Catania), Via Archirafi 32-90123 Palermo, Italy
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Brai M, Basile S, Bellia S, Hauser S, Puccio P, Rizzo S, Bartolotta A, Licciardello A. Environmental radioactivity at Stromboli (Aeolian Islands). Appl Radiat Isot 2002; 57:99-107. [PMID: 12137034 DOI: 10.1016/s0969-8043(02)00074-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
HPGe gamma spectrometry, thermoluminescence dosimetry, X-ray diffractometry and fluorescence techniques have been used to analyze the natural radionuclides content of soil and rock samples, air kerma and geochemical features on the island of Stromboli, belonging to the Aeolian Islands, in the Mediterranean Sea. The 214Bi, 238Ac, and 40K contents obtained are in agreement with the magmatic evolution of the rock formation, as shown by the correlations between radionuclide and chemical elements abundacies, depending on the various magmatic differentiation mechanisms. Correlations between radiometric, lithological and geochemical data have been assessed in order to obtain some hints on the geochronology of the magmatic products.
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Affiliation(s)
- M Brai
- Dipartimento di Fisica e Tecnologie Relative, Università di Palermo, Italy.
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Carini G, D’Angelo G, Tripodo G, Bartolotta A, Di Marco G, Lanza M, Privalko VP, Gorodilov BY, Rekhteta NA, Privalko EG. Locally heterogeneous dynamics in miscible blends of poly(methyl methacrylate) and poly(vinylidene fluoride). J Chem Phys 2002. [DOI: 10.1063/1.1464821] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bartolotta A, D'Oca MC, Brai M, Caputo V, De Caro V, Giannola LI. Response charactterization of ammonium tartrate solid state pellets for ESR dosimetry with radiotherapeutic photon and electron beams. Phys Med Biol 2001; 46:461-71. [PMID: 11229726 DOI: 10.1088/0031-9155/46/2/313] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Solid state pellets (1 mm thick) for electron spin resonance (ESR) dosimetry were made using ammonium tartrate as the radiation-sensitive substance. Their behaviour was experimentally investigated as a function of dose with 60Co gamma rays. The calibration function obtained permits measurements of absorbed dose in the 2-50 Gy range, with a combined uncertainty of +/-4%. The lowest detectable dose was about 0.5 Gy. These properties are comparable with or even better than those of ESR dosimeters made from other materials. The time stability of the ESR signal of ammonium tartrate dosimeters at different storage conditions after irradiation was studied. A rather complex behaviour was observed, which suggests that more species of free radicals are produced by radiation and that migration processes may be effective. No dependence of the response on beam quality was found for high-energy photon and electron beams produced by a linear accelerator used in radiotherapy, whereas dose was underestimated with low-energy x-rays.
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Affiliation(s)
- A Bartolotta
- Dipartimento Farmacochimico, Tossicologico e Biologico, Università di Palermo, Italy
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D’Angelo G, Tripodo G, Carini G, Bartolotta A, Di Marco G, Salvato G. Low-temperature excess specific heat and fragility in polymers: Crystallinity dependence. J Chem Phys 1998. [DOI: 10.1063/1.477384] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Bartolotta A, Forte C, Geppi M, Minniti D, Visalli G. Solid state NMR study of sodium thiocyanate/poly(ethylene oxide) electrolytes. Solid State Nucl Magn Reson 1997; 8:231-239. [PMID: 9373903 DOI: 10.1016/s0926-2040(97)00007-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
1H-, 13C-, 23Na-solid state NMR measurements have been used to characterise the morphology and the dynamics of several NaSCN-PEO mixtures. Selective 13C-MAS experiments allowed to determine the composition of the (PEO)nNaSCN samples in terms of the different phases present, as well as the real stoichiometry of the crystalline complex. 1H- and 13C-spin-lattice relaxation times provided estimates of the dimensions of the different domains and gave information on the dynamics of the polymer chains. 23Na-MAS spectra and 2D nutation experiments allowed to individuate the presence of different environments for the sodium cations on the basis of their quadrupolar interactions.
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Affiliation(s)
- A Bartolotta
- Istituto Tecniche Spettroscopiche del CNR, Messina, Italy
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Carini G, D'Angelo G, Tripodo G, Bartolotta A. Low-temperature excess specific heat and fragility in semicrystalline polymers. Phys Rev B Condens Matter 1996; 54:15056-15063. [PMID: 9985563 DOI: 10.1103/physrevb.54.15056] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bartolotta A, Brai M, Caputo V, Di Liberto R, Di Mariano D, Ferrara G, Puccio P, Sansone Santamaria A. The response behaviour of LiF:Mg,Cu,P thermoluminescence dosimeters to high-energy electron beams used in radiotherapy. Phys Med Biol 1995; 40:211-20. [PMID: 7708849 DOI: 10.1088/0031-9155/40/2/001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To ensure the effectiveness of radiation-therapy treatments, both in-phantom and in-patient reliable dose measurements are required. Thermoluminescence dosimeters are used commonly for both applications. Among the various available materials, the relatively new LiF:Mg,Cu,P phosphor is a suitable candidate for quality control of in vivo dosimetry in electron-beam therapy. The response behaviour of LiF:Mg,Cu,P chips to 6-21 MeV electron beams used in radiotherapy was studied. Batch homogeneity, dose linearity, sensitivity change after use, dose and dose-rate response, energy dependence and fading characteristics were investigated. The contribution from each factor to the overall uncertainty in dose measurement was evaluated. The results of this work show that the LiF:Mg,Cu,P chips are comparable to the commonly used LiF:Mg,Ti ones, and support their use for in vivo electron-beam dosimetry to an accuracy within +/- 10%.
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Affiliation(s)
- A Bartolotta
- Istituto Farmacochimico, Università di Palermo, Italy
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Bartolotta A, Lanza M, Carini G. Elastic behavior of polymers: Anharmonic and relaxational effects. Phys Rev B Condens Matter 1993; 48:10137-10142. [PMID: 10007288 DOI: 10.1103/physrevb.48.10137] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Van Laere K, Onori S, Bartolotta A, Callens F. Study of intrinsic energy dependence of α-alanine and dose intercomparison with ESR and ISE techniques. Appl Radiat Isot 1993. [DOI: 10.1016/0969-8043(93)90192-d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Coninckx F, Schönbacher H, Bartolotta A, Onori S, Rosati A. Alanine dosimetry as the reference dosimetric system in accelerator radiation environments. ACTA ACUST UNITED AC 1989. [DOI: 10.1016/0883-2889(89)90027-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Migliardo P, Romano GF, Aliotta F, Bartolotta A. Dynamical properties of LiI. Phys Rev B Condens Matter 1987; 36:8268-8273. [PMID: 9942637 DOI: 10.1103/physrevb.36.8268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Bartolotta A, Cusumano M, Di Marco G, Giannetto A, Guglielmo G. Spectral and kinetic evidence for attack at coordinated phenanthroline in the reaction between aliphatic amines and transition metal complexes of 5-nitro-1,10-phenanthroline. Polyhedron 1984. [DOI: 10.1016/s0277-5387(00)88009-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bartolotta A, Brai M, Messina M, Indovina PL. ESR spectra of normal human serum after treatment with complement activating agents. Z Naturforsch C Biosci 1980; 35:844-7. [PMID: 6255698 DOI: 10.1515/znc-1980-9-1034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We describe the appearance of a free-radical signal in the ESR spectrum of normal human serum incubated with several complement activating agents. The intensity of this signal is dependent of dose of activating agents, time and temperature. Signals elicited by different complement activators differ in morphology and kinetics. Inhibition by treatment with EDTA and the presence of the signal in activated C 6-deficient rabbit serum suggest that the convertase forming steps of complement activation (C2 to 5) could be the source of free-radical containing molecules.
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