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Tinti A, Carallo GA, Greco A, Romero-Sánchez MD, Vertuccio L, Guadagno L. Effective Practical Solutions for De-Icing of Automotive Component. Nanomaterials (Basel) 2022; 12:2979. [PMID: 36080016 PMCID: PMC9457547 DOI: 10.3390/nano12172979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/27/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Carbon Nanotube (CNTs)-based masterbatches have been mixed with thermoplastic polymers currently used to manufacture automotive components. These mixtures have been tailored to integrate an effective heating function in the materials. The manufacturing method for composite compounding and processing conditions significantly affects the electrical resistivity of the developed materials. The resistivity of the material can be controlled within tight tolerances sufficient to meet automotive requirements. The optimal compounding parameters of the melt process technologies were defined to obtain uniform filler dispersion and distribution. Heating and de-icing tests were performed on sheet specimens with optimized CNT content and electrical conductivity suitable for effective electro-thermal behaviour with low input voltages (≤24 V DC), making them safe for users. Finally, a simplified analytical model of the Joule effect arising from an energy balance of the system under study (heat equation) was developed and validated by comparison with experimental data for use in future development for the purpose of the preliminary design of components in the automotive sector.
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Affiliation(s)
- Andrea Tinti
- Consorzio CETMA, Advanced Materials & Processes Consulting Department, S.S. 7 km 706+030, 72100 Brindisi, Italy
| | - Gloria Anna Carallo
- Department of Innovation Engineering, University of Salento, Via Monteroni, 73100 Lecce, Italy
| | - Antonio Greco
- Department of Innovation Engineering, University of Salento, Via Monteroni, 73100 Lecce, Italy
| | | | - Luigi Vertuccio
- Department of Engineering, University of Campania “Luigi Vanvitelli”, Via Roma 29, 81031 Aversa, Italy
| | - Liberata Guadagno
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 84084 Fisciano, Italy
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Baraldi C, Tinti A, Ottani S, Gamberini MC. Characterization of polymorphic ampicillin forms. J Pharm Biomed Anal 2014; 100:329-340. [PMID: 25194347 DOI: 10.1016/j.jpba.2014.08.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 08/12/2014] [Accepted: 08/15/2014] [Indexed: 11/24/2022]
Abstract
In this work polymorphs of α-aminobenzylpenicillin (ampicillin), a β-lactamic antibiotic, were prepared and investigated by several experimental and theoretical methods. Amorphous monohydrate and three crystalline forms, the trihydrate, the crystal form I and the crystal form II, were investigated by FT-IR and micro-Raman. Also data obtained by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray powder diffraction (XRPD) and hot-stage Raman spectroscopy are reported. Finally, quantum mechanical calculations were performed by density functional theory (DFT) to assist the assignment of spectroscopic experimental bands. For the first time, the ampicillin molecule in its zwitterionic form was studied at the B3LYP/aug-cc-pVDZ level and the corresponding theoretical vibrational spectra were computed. In fact, ampicillin in the crystal is in zwitterionic form and concentrations of this same form are quite relevant in solutions at physiological pH. Experimental and theoretical results allowed identification of specific features for polymorph characterization. Bands typical of the different polymorphs are identified both in IR and Raman spectra: in particular in the NH stretching region (IR), in the amide I+δNH region (both techniques), in the 1520-1490cm(-1) region (IR), in the 1320-1300cm(-1) and 1280-1220cm(-1) (IR), in the 1200-1170cm(-1) (Raman), in the amide V region (IR), and, finally, in the 715-640cm(-1) and 220-200cm(-1) (Raman). Interconversion among different polymorphs was investigated by hot-stage Raman spectroscopy and thermal analysis, clarifying the complex pattern of transformations undergone as a function of temperature and heating rate. In particular, DSC scans show how the trihydrate crystals transform into anhydrous forms on heating. Finally, stability tests demonstrated, after a two years period, that no transformation or degradation of the polymorphs occurred.
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Affiliation(s)
- C Baraldi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi n.183, 41125 Modena, Italy
| | - A Tinti
- Department of Biomedical and Neuromotor Sciences, University of Bologna, via Belmeloro 8/2, 40126 Bologna, Italy
| | - S Ottani
- Istituto per la Sintesi Organica e la Fotoreattività, ISOF-CNR, via P. Gobetti 101, 40129 Bologna, Italy
| | - M C Gamberini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi n.183, 41125 Modena, Italy.
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Baraldi C, Freguglia G, Tinti A, Sparta M, Alexandrova AN, Gamberini MC. IR, Raman and SERS spectra of propantheline bromide. Spectrochim Acta A Mol Biomol Spectrosc 2013; 103:1-10. [PMID: 23228825 DOI: 10.1016/j.saa.2012.10.070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 08/06/2012] [Accepted: 10/27/2012] [Indexed: 06/01/2023]
Abstract
The two known propantheline bromide polymorphs (form I and form II) were studied and characterized by a multianalytical approach. In the present work, the identification of propantheline bromide polymorphic forms through vibrational IR spectroscopies are presented and for the first time Raman microscopy and hot stage Raman microscopy (HSRM) studies are reported. Finally, quantum mechanical calculations were performed. For assisting the assignment of the experimental picks, the two IR spectra of the most and least stable representatives of a set of 56 conformers are calculated and studied. DSC thermograms data, are also reported. The surface enhanced Raman scattering (SERS) spectrum was also recorded in a silver colloid; it could be inferred that propantheline bromide is adsorbed on silver colloid through the oxygen atom with the molecular plane perpendicular to the metal surface.
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Affiliation(s)
- C Baraldi
- Department of Pharmaceutical Sciences, Institute of Pharmacy, University of Modena and Reggio Emilia, via Campi n. 183, 41100 Modena, Italy
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Aramo C, Ambrosio A, Ambrosio M, Battiston R, Castrucci P, Cilmo M, De Crescenzi M, Fiandrini E, Guarino F, Grossi V, Maddalena P, Nappi E, Passacantando M, Pignatel G, Santucci S, Scarselli M, Tinti A, Valentini A. Development of new photon detection device for Cherenkov and fluorescence radiation. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135308014] [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: 11/14/2022] Open
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Gamberini M, Baraldi C, Tinti A, Rustichelli C, Ferioli V, Gamberini G. Solid state characterization of chloramphenicol palmitate. Raman spectroscopy applied to pharmaceutical polymorphs. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.10.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Krajewski A, Ravaglioli A, Tinti A, Taddei P, Mazzocchi M, Martinetti R, Fagnano C, Fini M. Comparison between the in vitro surface transformations of AP40 and RKKP bioactive glasses. J Mater Sci Mater Med 2005; 16:119-128. [PMID: 15744599 DOI: 10.1007/s10856-005-5913-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2003] [Accepted: 07/20/2004] [Indexed: 05/24/2023]
Abstract
Two bioactive silica-phosphate glasses, AP40 and RKKP, were compared in their behaviour in simulated biological environment. Their chemical composition is practically identical, except that RKKP contains small amounts of amphoteric network-former oxides Ta2O5 and La2O3 (composition in wt% for AP40: beta-Ca3(PO4)2 24.50, SiO2 44.30, CaO 18.60, Na2O 4.60, K2O 0.19, MgO 2.82, CaF2 4.99; RKKP: beta-Ca3(PO4)2 24.23, SiO2 43.82, CaO 18.40, Na2O 4.55, K2O 0.19, MgO 2.79, CaF2 4.94, Ta2O5 0.99, La2O3 0.09). Previous investigations showed a better performance in osteopenic bone for RKKP. To gain more insight into these differences in biological behaviour, the in vitro bioactivity of the glasses was studied by treatment with a continuously replenished Hanks' Balanced Salt Solution (HBSS). The glasses were examined before and after HBSS treatment for 20 and 40 days by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Energy Dispersion (EDX), Raman and IR vibrational spectroscopies. Some slight but notable differences between the two glasses were observed after HBSS treatment. IR and EDX analyses showed that deposits formed on both glasses were composed of a calcium deficient carbonate-apatite; however, the layer formed on RKKP glass was found to be slightly more calcium deficient and thinner. EDX analysis evidenced the presence of a small percentage of F- ions only in the layers formed on the RKKP samples. The differences disclosed, although slight, can contribute to the understanding of the different biological behaviour previously observed.
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Affiliation(s)
- A Krajewski
- ISTEC-CNR, Via Granarolo 64, 48018, Faenza (Ravenna), Italy
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Abstract
The proposed curative properties of Cu-based nonsteroidal anti-inflammatory drugs (NSAIDs) have led to the development of numerous Cu(II) complexes of NSAIDs with enhanced anti-inflammatory activity. Crystalline complexes, Cu(II)-NSAID (ibuprofen, naproxen, tolmetin, and diclofenac), with a carboxylic function have been studied by means of infrared and Raman spectroscopy. All NSAIDs bind the metal through the carboxylate group. On the basis of the comparison between the wavenumber of the COO(-) group vibrations and Delta nu (nu(asimm)COO(-) - nu(simm)COO(-)) between Na salts and Cu(II) complexes, conclusions on the probable structure of the complexes have been drawn. The spectroscopic data support the formation of dimeric [Cu(2)L(4)(H(2)O)(2)] complexes in which the COO(-) group behaves as a bridging bidentate ligand. The low wavenumber region of the Raman spectrum provided information on Cu-O and Cu-Cu bonds in the complexes. Thermogravimetric results gave further support to the vibrational data.
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Affiliation(s)
- A Trinchero
- Alma Mater Studiorum Bologna University, Department of Biochemistry, via Belmeloro 8/2, Bologna 40126, Italy
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Tinti A, Lucertini M, Costantini PG, Coschiera P, Stafoggia P. [Reliability of extemporaneous histological sentinel lymph node examination during breast surgery for neoplasia]. Tumori 2003; 89:200-2. [PMID: 12903593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Lymphatic mapping and sentinel lymph node (SLN) biopsy for breast cancer is rapidly becoming the standard of care. This is mainly due to the accuracy of the procedure, with a significant decrease in morbidity compared with the standard level III node dissection. We present our experience with SLN biopsy and a small series in which we performed an immediate histologic evaluation of the SLN: in case of positive SLN, a complete lymph node dissection was carried out in the same operative time, thus reducing the need of a second operation. In our experience, we had a 100% accordance between immediate and definitive results: we had neither false positive, which could lead to overtreat the patients with an unnecessary lymph node dissection, nor false negative.
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Affiliation(s)
- A Tinti
- Unità Operativa di Chirurgia Generale, Azienda Ospedaliera San Salvatore, Pesaro
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11
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Cicetti M, Corinaldesi F, Costantini PG, Stafoggia P, Tamburini A, Tinti A. [172 consecutive total gastrectomies for gastric cancer with Roux-en-Y loop reconstruction and without fistulization of the esophago-jejunal anastomosis]. Tumori 2003; 89:29-31. [PMID: 12903538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
In the treatment of gastric cancer total gastrectomy (TG) is one of the most important operation and the esophagojejunal anastomotic leakage is the most important early complication. In our series of 172 consecutive TGs (all controlled with Gastrografin-Rx in fifth postoperative day) we did not have any anastomotic fistula, independently from age, stage, type of limphadenectomy and visceral demolition. We believe that the correct technical performance is the most important factor in the esophagojejunal anastomosis.
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Affiliation(s)
- M Cicetti
- UO Chirurgia Generale, Azienda Ospedaliera S Salvatore, Pesaro
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Abstract
Lipids from human renal tissues are studied by means of (1)H- and (13)C-NMR spectroscopy. The total lipid fractions obtained from healthy kidneys, malignant renal cell carcinomas, and benign oncocytomas are characterized and analyzed to elucidate the main differences between the functional and neoplastic tissues. In all cases the lipid components are well identified. The healthy kidney is characterized by high amounts of triglycerides and the presence of cholesterol in its free form. On the contrary, renal cell carcinomas contain high amounts of cholesterol that are almost completely esterified as oleate, suggesting an intracellular localization of the cholesteryl esters synthesis. Cholesteryl esters are considered markers of renal cell carcinomas, thus supporting recent theories that these compounds play a leading role in cell proliferation. Oncocytomas are particularly rich in phosphatidylcholine and, analogous to the healthy kidney, are completely lacking in cholesteryl esters. Healthy kidneys and oncocytomas appear to have other similarities if compared with renal cell carcinomas: a very high fatty acyl/cholesterol ratio, the presence of dolichols, and a higher grade of unsaturation. The (13)C data suggest a new method for the direct evaluation of the saturated/unsaturated fatty acyl ratio.
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Affiliation(s)
- V Tugnoli
- Dipartimento di Biochimica G. Moruzzi, Sezione di Chimica e Propedeutica Biochimica, Università di Bologna, Via Belmeloro 8/2, 40126 Bologna, Italy.
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13
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Martini D, Fini M, Franchi M, Pasquale VD, Bacchelli B, Gamberini M, Tinti A, Taddei P, Giavaresi G, Ottani V, Raspanti M, Guizzardi S, Ruggeri A. Detachment of titanium and fluorohydroxyapatite particles in unloaded endosseous implants. Biomaterials 2003; 24:1309-16. [PMID: 12527273 DOI: 10.1016/s0142-9612(02)00508-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [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: 10/27/2022]
Abstract
The shape, surface composition and morphology of orthopaedic and endosseous dental titanium implants are key factors to achieve post-surgical and long-term mechanical stability and enhance implant osteointegration. In this study a comparison was made between 12 titanium screws, plasma-spray-coated with titanium powders (TPS), and 12 screws with an additional coating of fluorohydroxyapatite (FHA-Ti). Screws were implanted in the femoral and tibial diaphyses of two mongrel sheep and removed with peri-implant tissues 12 weeks after surgery. The vibrational spectroscopic, ultrastructural and morphological analyses showed good osteointegration for both types of implants in host cortical bone. The portion of the FHA-Ti implants in contact with the medullary canal showed a wider area of newly formed peri-implant bone than that of the TPS implants. Morphological and EDAX analyses demonstrated the presence of small titanium debris in the bone medullary spaces near the TPS surface, presumably due to the friction between the host bone and the implant during insertion. Few traces of titanium were detected around FHA-Ti implants, even if smaller FHA debris were present. The present findings suggest that the FHA coating may act as a barrier against the detachment of titanium debris stored in the medullary spaces near the implant surface.
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Affiliation(s)
- D Martini
- Istituto di Anatomia Umana Normale, Via Irnerio 48, 40126, Bologna, Italy.
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Tugnoli V, Tosi MR, Tinti A, Trinchero A, Bottura G, Fini G. Characterization of lipids from human brain tissues by multinuclear magnetic resonance spectroscopy. Biopolymers 2002; 62:297-306. [PMID: 11857268 DOI: 10.1002/bip.10005] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.2] [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: 12/14/2022]
Abstract
Multinuclear ((1)H, (13)C, and (31)P) magnetic resonance spectroscopy are applied to the biochemical characterization of the total lipid fraction of healthy and neoplastic human brain tissues. Lipid extracts from normal brains, glioblastomas, anaplastic oligodendrogliomas, oligodendrogliomas, and meningiomas are examined. Moreover, the unknown liquid content of a cyst adjacent to a meningioma is analyzed. Two biopsies from glioblastomas are directly studied by (1)H-NMR without any treatment (ex vivo NMR). The (1)H- and (13)C-NMR analysis allows full characterization of the lipid component of the cerebral tissues. In particular, the presence of cholesteryl esters and triglycerides in the extracts of high grade tumors is correlated to the vascular proliferation degree, which is different from normal brain tissue and low grade neoplasms. The (31)P spectra show that phosphatidylcholine is the prominent phospholipid and its relative amount, which is higher in gliomas, is correlated to the low grade of differentiation of tumor cells and an altered membrane turnover. The ex vivo (1)H-NMR data on the glioblastoma samples show the presence of mobile lipids that are correlated to cell necrotic phenomena. Our data allow a direct correlation between biochemical results obtained by NMR and the histopathological factors (vascular and cell proliferations, differentiation, and necrosis) that are prominent in determining brain tumor grading.
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Affiliation(s)
- V Tugnoli
- Dipartimento di Biochimica G. Moruzzi, Sezione di Chimica e Propedeutica Biochimica, Università, Via Belmeloro 8/2, 40126 Bologna, Italy.
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Affatato S, Bordini B, Fagnano C, Taddei P, Tinti A, Toni A. Effects of the sterilisation method on the wear of UHMWPE acetabular cups tested in a hip joint simulator. Biomaterials 2002; 23:1439-46. [PMID: 11829439 DOI: 10.1016/s0142-9612(01)00265-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [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: 11/23/2022]
Abstract
Ultra-high molecular-weight-polyethylene is the most commonly used bearing material in total joint replacement. Wear of polyethylene is a Serious Clinical problem that limits the longevity of orthopaedic implants. Information on degradative changes in the material properties and on the methods used for the sterilisation of polyethylene may help in the selection process of orthopaedic implants with the best wear resistance. This study was performed to investigate the effects of the sterilisation method (gamma irradiation and ethylene oxide treatment) on the wear and on the changes in physical properties of polyethylene acetabular cups. At this purpose, gamma-sterilised and ethylene oxide (EtO)-sterilised acetabular cups were tested against CoCr femoral heads in a hip joint simulator run for 5 million cycles in bovine calf serum. The crystallinity of the cups was evaluated by micro-Raman spectroscopy as a function of the inner surface position. The partial least square calibration was used to correlate the Raman spectra with the crystallinity of the polymer measured by differential scanning calorimetry. The analysis performed on soak control acetabular cups demonstrated that the gamma-sterilised cups are significantly more crystalline than the EtO-sterilised ones. The mean crystallinity values obtained for the gamma-sterilised and EtO-sterilised soak control cups were 65.0% and 63.4%, respectively. Weight loss measurements revealed that the gamma-sterilised acetabular cups exhibited a lower wear rate than that by EtO-sterilised. Thc Raman results obtained on gamma-sterilised and EtO-sterilised acetabular cups showed that the changes in surface crystallinity were mainly caused by irradiation rather than by the mechanical friction during the in vitro tests.
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Affiliation(s)
- S Affatato
- Laboratorio di Tecnologia Medica, Istituti Ortopedici Rizzoli, Bologna, Italy.
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Tosi M, Fini G, Tinti A, Reggiani A, Tugnoli V. Molecular characterization of human healthy and neoplastic cerebral and renal tissues by in vitro 1H NMR spectroscopy (Review). Int J Mol Med 2002. [DOI: 10.3892/ijmm.9.3.299] [Citation(s) in RCA: 2] [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: 11/06/2022] Open
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Tosi MR, Fini G, Tinti A, Reggiani A, Tugnoli V. Molecular characterization of human healthy and neoplastic cerebral and renal tissues by in vitro (1)H NMR spectroscopy (review). Int J Mol Med 2002; 9:299-310. [PMID: 11836637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
The clinical impact of (1)H NMR spectroscopy in the study of human organs, brain and kidney in particular, is well demonstrated. The in vitro (1)H NMR technique is a powerful tool for monitoring changes in intracellular metabolites of human normal and neoplastic cerebral and renal tissues. Healthy and tumoral tissues of different histologic types have been fully characterized from a biochemical standpoint. Molecular characterization is performed on both the aqueous and lipid extracts of surgically removed tissue biopsies yielding a full picture of tissue biochemistry. These analyses have disclosed markers of healthy brain and kidney and of their respective neoplastic lesions. Moreover, some biochemical features can differentiate neoplasms within the same histological type. In particular, lipidic components, like cholesteryl esters (namely oleate), detected in highest grade tumors, warrant further investigation. A better understanding of the biochemistry of diseased human tissues could open the way to new diagnostic and treatment strategies.
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Affiliation(s)
- M R Tosi
- Istituto di Citomorfologia Normale e Patologica del CNR, Bologna, Italy.
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Baraldi P, Bondioli F, Fagnano C, Ferrari AM, Tinti A, Vinella M. Study of the vibrational spectrum of cuprorivaite. Ann Chim 2001; 91:679-92. [PMID: 11836946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Abstract
In this research, after tracing a history of the pigment, the preparation and analysis of samples of Egyptian blue have been reported. The main reactions taking place during its preparation are indicated. X-ray diffractions show that, starting from mixtures of precursors with stoichiometric composition, the product is practically only cuprorivaite. The kind of flux and cristallinity of silica does not seem determining factors for the pigment formation. Infrared and Raman spectra and an assignment of the bands are reported. Impurities ascertained are discussed on the basis on the data available.
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MESH Headings
- Copper/chemistry
- Egypt
- History, 18th Century
- History, 20th Century
- History, Ancient
- History, Medieval
- Microscopy, Electron, Scanning
- Pigments, Biological/chemistry
- Pigments, Biological/history
- Silicates/chemistry
- Spectroscopy, Fourier Transform Infrared
- Spectrum Analysis, Raman
- Thermogravimetry
- X-Ray Diffraction
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Affiliation(s)
- P Baraldi
- Dipartimento di Chimica, Università di Modena e Reggio E., Via Campi 183, 41100 Modena, Italy.
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Abstract
We describe a rare case of a woman aged 38 who presented with an untreated omphalocele in association with a duplication of the vena cava and malposition of the right kidney. An aesthetic and functional reconstruction of the abdomen was achieved with local flaps and the creation of a neoumbilicus.
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Affiliation(s)
- C Alfano
- Plastic Surgery Department, University of Rome La Sapienza, Rome, Italy
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Tinti A, Tugnoli V, Tosi M, Casarini D. Spectroscopic characterization of cyclic GMP in dimethylsulfoxide and water solutions. J Mol Struct 2001. [DOI: 10.1016/s0022-2860(01)00501-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
In this work calcium phosphate (CaP) compounds with different PO(3-)(4)/HPO(2-)(4) R molar ratios in the 0.65-149 range were synthesized. In fact, all these CaPs contain different amounts of HPO(2-)(4) and PO(3-)(4) ions as well as the amorphous precursors (tricalcium phosphate and octacalcium phosphate) of hydroxyapatite deposition, which was shown by in vitro and in vivo measurements. Spectroscopical IR and Raman results showed the presence of bands whose intensity ratio can be related to the molar ratio R; in particular, the Raman I(962)/I(987) and the IR I(1035)/I(1125) intensity ratios were characterized as markers of the molar ratio. For these CaP compounds a nucleation model, which was based on the ability of HPO(2-)(4) ions to form strong H bonds with PO(3-)(4) ions, was proposed.
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Affiliation(s)
- P Taddei
- Dipartimento di Biochimica "G. Moruzzi," Sezione di Chimica e Propedeutica Biochimica, via Belmeloro 8/2, Università di Bologna, 40126 Bologna, Italy
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Pittau E, Tinti A, Martini L, Bogliolo A, Perpignano G. Systemic lupus erythematosus with pitting oedema of the distal lower limbs. Br J Rheumatol 1998; 37:104-5. [PMID: 9487261 DOI: 10.1093/rheumatology/37.1.104] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Pittau E, Bogliolo A, Tinti A, Mela Q, Ibba G, Salis G, Perpignano G. Development of arthritis and hypothyroidism during alpha-interferon therapy for chronic hepatitis C. Clin Exp Rheumatol 1997; 15:415-9. [PMID: 9272304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Alpha-interferon (alpha-IFN) therapy may induce, reveal or exacerbate various autoimmune-related disorders. The most common is the development of autoantibodies, while clinically overt autoimmune diseases are rare. We describe a 49-year-old woman who developed seronegative rheumatoid-like arthritis and autoimmune hypothyroidism after 7 months of human lymphoblastoid alpha-IFN therapy given for hepatitis C virus-related chronic active hepatitis (CAH-HCV). There was no family or personal history of autoimmune, thyroid or articular diseases. Our patient required continuous therapy for arthritis and hypothyroidism despite discontinuation of alpha-IFN. This suggests that alpha-IFN therapy may induce the contemporary appearance of two different persistent autoimmune-related diseases in the same patient. However, chronic HCV infection may play an important adjuvant role in the development of these diseases.
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Affiliation(s)
- E Pittau
- I Cattedra di Reumatologia, Policlinico Universitario di Cagliari, Italy
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24
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Pacifici A, Cordellini M, Cirocchi R, Trapassi S, Rosi G, Bistoni S, Tinti A, Dominici C. [Use of Doppler color ultrasonography in the microsurgical treatment of idiopathic varicocele]. G Chir 1997; 18:140-2. [PMID: 9206497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aim of this paper is to evaluate the role of Doppler and echo color-Doppler in the microsurgical treatment of varicocele. Since December 1993, 87 consecutive patients underwent microsurgical treatment of varicocele. The study demonstrates that Doppler and Color-flow-Duplex scanning provide an accurate, non-invasive method to identify the position of accessory spermatic veins, evaluating at the same time the flow characteristics of the microsurgical anastomosis.
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Affiliation(s)
- A Pacifici
- Cattedra di Chirurgia Plastica e Ricostruttiva, Università degli Studi di Perugia
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25
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Pacifici A, Cirocchi R, Flamini FO, Cordellini M, Tinti A, Coccaro A, Trapassi S, Alemagni Pimpinelli G, Dominici C. [Pre- and postoperative color Doppler ultrasonography of myocutaneous flaps in reconstructive surgery of the breast]. MINERVA CHIR 1997; 52:247-50. [PMID: 9148213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The authors present their experience in the study of blood supply of flaps. The machine used to study both pre and postoperatively the myocutaneous flap is the echo-color Doppler, a brand new device which has recently been used in investigating the morphology and the blood supply. The use of such method has provided us with the following information: detailed ultrasound structure of the skin, subcutaneous and muscular tissues of the examined flap; localization of vessels within the flap; size of the vessel in its whole length; quality and speed of both the arterial and venous flow. Such information is very important for the surgeon to plan in detail the reconstruction by knowing the blood supply of myocutaneous flap.
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Affiliation(s)
- A Pacifici
- Dipartimento di Chirurgia Generale ed Emergenze Chirurgiche, Università degli Studi, Perugia
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Pacifici A, Tinti A, Flamini FO, Cordellini M, Trapassi S, Dominici C. Colour flow duplex scanning: an accurate, non-invasive technique for preoperative evaluation of the vascular supply of the rectus abdominis myocutaneous flap. Scand J Plast Reconstr Surg Hand Surg 1995; 29:319-24. [PMID: 8771258 DOI: 10.3109/02844319509008966] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Forty patients were examined with colour Doppler to study the vascularization of rectus abdominis myocutaneous flaps before operations. The accuracy of this non-invasive ultrasound technique allowed us to describe the characteristics of the blood flow, including volume and velocity, diameter of vessels and their transverse section area within the epigastric arteries which supply the superior and inferior vascular pedicles of the flap. Vessels are drawn on the skin surface so that the flap can be more precisely and rapidly dissected. We are now using colour Doppler to assess variations in the diameter of vessels and in other variables of blood flow within the vascular pedicle of the transferred flap. These evaluations before and after operation are a great help to the reconstructive surgeon in the choice of operation and will lead to an appreciable reduction in postoperative morbidity.
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Affiliation(s)
- A Pacifici
- Division of Plastic and Reconstructive Surgery, Hospital, University of Perugia, Spoleto, Italy
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27
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Pittau E, Bogliolo A, Tinti A, Perpignano G. [RS3PE syndrome. A new rheumatic inflammatory syndrome in advanced age]. Clin Ter 1995; 146:663-73. [PMID: 8720343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
RS3PE syndrome (Remitting Seronegative Symmetrical Synovitis with Pitting Edema) is a new form of arthritis in the elderly, characterized by symmetrical polysynovitis of acute onset associated with distal pitting edema. Tests for serum IgM rheumatoid factor are typically negative. RS3PE syndrome affects Caucasians aged over 60, predominantly males. It has a benign course and remits completely without residua.
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Affiliation(s)
- E Pittau
- Università degli Studi di Cagliari
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28
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Dominici C, Pacifici A, Tinti A, Cordellini M, Flamini FO. Preoperative and postoperative evaluation of latissimus dorsi myocutaneous flap vascularization by color flow duplex scanning. Plast Reconstr Surg 1995; 96:1358-65. [PMID: 7480234 DOI: 10.1097/00006534-199511000-00019] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
At the Plastic and Reconstructive Surgery Department of the University of Perugia, 104 patients have been examined by color flow duplex scanning in order to study latissimus dorsi vascular supply before and after surgical procedures. This noninvasive ultrasound technique provides a precise and accurate measurement of blood flow velocity (15 cm/s) and volume (27 ml/min) within the thoracodorsal artery, which represents the vascular pedicle of the flap, and it allows us to detect the exact location of the perforating branches with their cutaneous distribution. This preoperative evaluation, pointing out vascular pathologies that contraindicate use of the latissimus dorsi flap, can be considered a great help for the reconstructive surgeon in the choice of the most suitable operation, and it can surely lead to a significant decrease in postoperative graft failure rates.
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Affiliation(s)
- C Dominici
- Division of Plastic and Reconstructive Surgery, University of Perugia, Italy
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29
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Jancura D, Sánchez-cortés S, Kocisova E, Tinti A, Miskovsky P, Bertoluzza A. Surface-enhanced resonance raman spectroscopy of hypericin and emodin on silver colloids: SERRS and NIR FTSERS study. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/bspy.350010405] [Citation(s) in RCA: 40] [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: 11/05/2022]
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Muttini A, Petrizzi L, Tinti A, Bertoluzza A. Synovial fluid parameters in normal and osteochondritic hocks of horses with open physis. Boll Soc Ital Biol Sper 1994; 70:337-44. [PMID: 7748533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An investigation was carried out on most common synovial fluid parameters of normal and osteochondritic hocks of horses less than 12 months old in order to confirm the presence of an inflammatory process. Furthermore, a spectroscopic study was performed on synovial fluid from both normal and diseased hocks. A depolymerization of hyaluronic acid was demonstrated in synovial fluid from diseases joints, similar to that reported in human rheumatoid arthritis. A one month rest seem to normalize all parameters considered and in one joint, a return to normal infrared spectrum was demonstrated.
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Affiliation(s)
- A Muttini
- Institute of Surgical Veterinary Clinic, University of Bologna
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Abstract
This review deals with the application of Raman spectroscopy to the study of the biocompatibility of orthopaedic and ophthalmological materials and includes an introduction, a brief theory on the fundamental concepts of the technique, a description of the method and of the traditional and non-traditional instrumentation and a brief treatment of the surface properties of the different classes of materials. In the orthopaedic field, Raman studies on the structures of glasses, ceramic materials, carbon fibres and polymers before and after implantation are reviewed, particularly as far as structural modifications at the biomaterial-tissues interface are concerned. In the ophthalmological field, the chemical biocompatibility of hydrophobic and hydrophilic polymers for intraocular and intrastromal implants and for soft contact lenses is considered with respect to the presence of monomeric reactive centres in hydrophobic materials and the water amount in hydrophilic ones. The progress of the multichannel Raman technique for 'in-vivo' measurements is also described.
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Affiliation(s)
- A Bertoluzza
- Department of Biochemistry, Centro di Studio Interfacoltá sulla Spettroscopia Raman, University of Bologna, Italy
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Bertoluzza A, Simoni R, Tinti A, Morocutti M, Ottani V, Ruggeri A. Calcium phosphate materials containing alumina: Raman spectroscopical, histological, and ultrastructural study. J Biomed Mater Res 1991; 25:23-38. [PMID: 2019610 DOI: 10.1002/jbm.820250103] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Variable alumina quantities were added to two types of calcium phosphate materials-hydroxyapatite ceramics with Ca/P = 1.67 and calcium metaphosphate glass with Ca/P = 1--in order to increase their mechanical properties. Raman spectroscopy shows that alumina interacts with the phosphate group of these materials, while thermomechanical analysis shows that their elastic modulus has a value similar to that of bone. Histological sections demonstrate that the surface in close contact with ceramic materials shows a good integration between bone and biomaterial. All ceramic specimens are penetrated by well-stained, presumably glycoprotein, matrix, that consistently forms a thin network in close contact with the implant. After 6 weeks bone growing on both ceramic and glass shows signs of maturation with a lamellar structure and an apparently normal mineralization. In the case of the glass, inside this newly formed bone, were often observed two layers, the internal one showing a well defined lamellar structure.
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Affiliation(s)
- A Bertoluzza
- Sezione di Chimica e Propedeutica Biochemica, Dipartimento di Biochimica, Bologna, Italy
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Bertoluzza A, Fagnano C, Tinti A, Toni A, Ciapetti G, Sudanese A, Cattaneo C. Raman spectroscopy for the study of porous composite alumina coating. J Biomed Mater Res 1989; 23:523-8. [PMID: 2715164 DOI: 10.1002/jbm.820230506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A new acetabular cup prosthesis made of alumina and bioactive glass was studied and evaluated using nondestructive and noninvasive Raman laser spectroscopy. The prosthesis consists of an alumina socket coated with a double layer of alumina beads bonded to the prosthesis with a layer of glass. Raman spectroscopy showed that both the socket and the beads are composed of alpha-Al2O3 (corundum), while the bioactive glass (alkaline and alkaline earth alumosilicate with a small quantity of zirconium oxide) showed this to have an intermediate structure between that of vitreous silica and that of the alkaline and alkaline earth disilicate glasses. The Raman spectra of the contact surfaces between the bioactive glass and the alumina of the assembled prosthesis and of an alumina disk coated with the same glass showed the presence of new bands which may be correlated with a chemical interaction between the components of the prosthesis.
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Affiliation(s)
- A Bertoluzza
- Centro Studi Interfacolta' sulla Spettroscopia Raman, Dipartimento di Biochimica, Universita' di Bologna, Italy
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Pizzoferrato A, Toni A, Sudanese A, Ciapetti G, Tinti A, Venturini A. Multilayered bead ceramic composite coating for hip prostheses: experimental studies and preliminary clinical results. J Biomed Mater Res 1988; 22:1181-202. [PMID: 3235458 DOI: 10.1002/jbm.820221209] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The clinical use of a new ceramic composite material made up of multilayered alumina beads and adhered to a ceramic surface with a high-temperature-melting bioglass is proposed. The result is a structure characterised by a 27% porosity and an average pore diameter of 400 microns. The actual structure of the parts as well as their interface interaction were determined by Raman laser. The mechanical resistance of the adherence of this coating for the ceramic substratum was good enough to resist the stress to which it was submitted when used for a new model of prosthetic acetabulum. Experiments with rabbits revealed the good biocompatibility of the composite. The osteoproductive activity of the tissue surrounding the implant led to the gradual filling of the porosity with trabecular structures. The preliminary results of the clinical experience which began in November 1985, confirm the good compatibility of the ceramic composite.
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Affiliation(s)
- A Pizzoferrato
- Centro di Ricerca per la Biocompatibilitá dei Materiali da Impianto, Istituto Rizzoli, Bologna, Italy
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Salmi A, Paterlini A, Arnaboldi F, Cavaglieri D, Tinti A, Pozza G, Soldi F, Belometti I, Zardetto C, Archetti L. [Laparoscopic gynecologic diagnosis using local anesthesia]. Minerva Ginecol 1987; 39:437-40. [PMID: 2957616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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37
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Nicolini U, Todros T, Ferrazzi E, Zorzoli A, Groli C, Zucca S, Tinti A, Dodero D, Destro F, Ceccarello P. [Transverse fetal growth curves. A multicenter study]. Minerva Ginecol 1986; 38:873-87. [PMID: 3808422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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38
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Frangipani GC, Samaja BA, Tinti A, Spandrio L, Tampalini L. [Lactic acid, pyruvic acid and acid-base equilibrium in maternal and fetal blood during labor. II. During maternal hyperoxygenation]. Ann Ostet Ginecol Med Perinat 1969; 91:14-23. [PMID: 5399712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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39
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Frangipani GC, Samaja BA, Tinti A, Spandrio L, Tampalini L. [Lactic and pyruvic acid and acid-base equilibrium in the maternal and fetal blood during labor. 3. During paracervical block]. Ann Ostet Ginecol Med Perinat 1969; 91:24-43. [PMID: 5408036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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