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Baiutti F, Gregori G, Suyolcu YE, Wang Y, Cristiani G, Sigle W, van Aken PA, Logvenov G, Maier J. High-temperature superconductivity at the lanthanum cuprate/lanthanum-strontium nickelate interface. Nanoscale 2018; 10:8712-8720. [PMID: 29701210 DOI: 10.1039/c8nr00885j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The utilization of interface effects in epitaxial systems at the nanoscale has emerged as a very powerful approach for engineering functional properties of oxides. Here we present a novel structure fabricated by a state-of-the-art oxide molecular beam epitaxy method and consisting of lanthanum cuprate and strontium (Sr)-doped lanthanum nickelate, in which interfacial high-temperature superconductivity (Tc up to 40 K) occurs at the contact between the two phases. In such a system, we are able to tune the superconducting properties simply by changing the structural parameters. By employing electron spectroscopy and microscopy combined with dedicated conductivity measurements, we show that decoupling occurs between the electronic charge carrier and the cation (Sr) concentration profiles at the interface and that a hole accumulation layer forms, which dictates the resulting superconducting properties. Such effects are rationalized in the light of a generalized space-charge theory for oxide systems that takes account of both ionic and electronic redistribution effects.
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Affiliation(s)
- F Baiutti
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
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2
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Cristiani G, Marcuzzi A, Marcialis M, Castagnini L, Caroli A. Partial trapeziectomy, ligament reconstruction and interpositional arthroplasty for TM arthritis of the thumb. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s0266-7681(97)80223-9] [Citation(s) in RCA: 4] [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: 11/30/2022]
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3
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Baiutti F, Logvenov G, Gregori G, Cristiani G, Wang Y, Sigle W, van Aken PA, Maier J. High-temperature superconductivity in space-charge regions of lanthanum cuprate induced by two-dimensional doping. Nat Commun 2015; 6:8586. [PMID: 26481902 PMCID: PMC4634214 DOI: 10.1038/ncomms9586] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 09/09/2015] [Indexed: 11/18/2022] Open
Abstract
The exploitation of interface effects turned out to be a powerful tool for generating exciting material properties. Such properties include magnetism, electronic and ionic transport and even superconductivity. Here, instead of using conventional homogeneous doping to enhance the hole concentration in lanthanum cuprate and achieve superconductivity, we replace single LaO planes with SrO dopant planes using atomic-layer-by-layer molecular beam epitaxy (two-dimensional doping). Electron spectroscopy and microscopy, conductivity measurements and zinc tomography reveal such negatively charged interfaces to induce layer-dependent superconductivity (Tc up to 35 K) in the space-charge zone at the side of the planes facing the substrate, where the strontium (Sr) profile is abrupt. Owing to the growth conditions, the other side exhibits instead a Sr redistribution resulting in superconductivity due to conventional doping. The present study represents a successful example of two-dimensional doping of superconducting oxide systems and demonstrates its power in this field. Introduction of higher-dimensional structure elements into solids is used to generate unusual materials properties. Here, the authors report how replacing LaO planes with SrO dopants yields space-charge induced superconductivity, showing the potential of two-dimensional doping in this field.
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Affiliation(s)
- F Baiutti
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart 70569, Germany
| | - G Logvenov
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart 70569, Germany
| | - G Gregori
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart 70569, Germany
| | - G Cristiani
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart 70569, Germany
| | - Y Wang
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, Stuttgart 70569, Germany
| | - W Sigle
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, Stuttgart 70569, Germany
| | - P A van Aken
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, Stuttgart 70569, Germany
| | - J Maier
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart 70569, Germany
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4
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Hepting M, Minola M, Frano A, Cristiani G, Logvenov G, Schierle E, Wu M, Bluschke M, Weschke E, Habermeier HU, Benckiser E, Le Tacon M, Keimer B. Tunable Charge and Spin Order in PrNiO_{3} Thin Films and Superlattices. Phys Rev Lett 2014; 113:227206. [PMID: 25494088 DOI: 10.1103/physrevlett.113.227206] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Indexed: 06/04/2023]
Abstract
We use polarized Raman scattering to probe lattice vibrations and charge ordering in 12 nm thick, epitaxially strained PrNiO_{3} films, and in superlattices of PrNiO_{3} with the band insulator PrAlO_{3}. A carefully adjusted confocal geometry is used to eliminate the substrate contribution to the Raman spectra. In films and superlattices under tensile strain which undergo a metal-insulator transition upon cooling, the Raman spectra reveal phonon modes characteristic of charge ordering. These anomalous phonons do not appear in compressively strained films, which remain metallic at all temperatures. For superlattices under compressive strain, the Raman spectra show no evidence of anomalous phonons indicative of charge ordering, while complementary resonant x-ray scattering experiments reveal antiferromagnetic order associated with a modest increase in resistivity upon cooling. This confirms theoretical predictions of a spin density wave phase driven by spatial confinement of the conduction electrons.
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Affiliation(s)
- M Hepting
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - M Minola
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - A Frano
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany and Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - G Cristiani
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - G Logvenov
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - E Schierle
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - M Wu
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - M Bluschke
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany and Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - E Weschke
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - H-U Habermeier
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - E Benckiser
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - M Le Tacon
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
| | - B Keimer
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
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Frano A, Schierle E, Haverkort MW, Lu Y, Wu M, Blanco-Canosa S, Nwankwo U, Boris AV, Wochner P, Cristiani G, Habermeier HU, Logvenov G, Hinkov V, Benckiser E, Weschke E, Keimer B. Orbital control of noncollinear magnetic order in nickel oxide heterostructures. Phys Rev Lett 2013; 111:106804. [PMID: 25166693 DOI: 10.1103/physrevlett.111.106804] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 07/10/2013] [Indexed: 06/03/2023]
Abstract
We have used resonant x-ray diffraction to develop a detailed description of antiferromagnetic ordering in epitaxial superlattices based on two-unit-cell thick layers of the strongly correlated metal LaNiO3. We also report reference experiments on thin films of PrNiO3 and NdNiO3. The resulting data indicate a spiral state whose polarization plane can be controlled by adjusting the Ni d-orbital occupation via two independent mechanisms: epitaxial strain and spatial confinement of the valence electrons. The data are discussed in light of recent theoretical predictions.
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Affiliation(s)
- A Frano
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany and Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - E Schierle
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - M W Haverkort
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - Y Lu
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - M Wu
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - S Blanco-Canosa
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - U Nwankwo
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - A V Boris
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - P Wochner
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - G Cristiani
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - H U Habermeier
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - G Logvenov
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - V Hinkov
- Quantum Matter Institute, University of British Columbia, Vancouver, British Colombia V6T 1Z1, Canada
| | - E Benckiser
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
| | - E Weschke
- Helmholtz-Zentrum Berlin für Materialien und Energie, Wilhelm-Conrad-Röntgen-Campus BESSY II, Albert-Einstein-Strasse 15, D-12489 Berlin, Germany
| | - B Keimer
- Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
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Boris AV, Matiks Y, Benckiser E, Frano A, Popovich P, Hinkov V, Wochner P, Castro-Colin M, Detemple E, Malik VK, Bernhard C, Prokscha T, Suter A, Salman Z, Morenzoni E, Cristiani G, Habermeier HU, Keimer B. Dimensionality Control of Electronic Phase Transitions in Nickel-Oxide Superlattices. Science 2011; 332:937-40. [DOI: 10.1126/science.1202647] [Citation(s) in RCA: 296] [Impact Index Per Article: 22.8] [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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7
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Hoppler J, Stahn J, Niedermayer C, Malik VK, Bouyanfif H, Drew AJ, Rössle M, Buzdin A, Cristiani G, Habermeier HU, Keimer B, Bernhard C. Giant superconductivity-induced modulation of the ferromagnetic magnetization in a cuprate-manganite superlattice. Nat Mater 2009; 8:315-319. [PMID: 19219030 DOI: 10.1038/nmat2383] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2008] [Accepted: 01/12/2009] [Indexed: 05/27/2023]
Abstract
Artificial multilayers offer unique opportunities for combining materials with antagonistic orders such as superconductivity and ferromagnetism and thus to realize novel quantum states. In particular, oxide multilayers enable the utilization of the high superconducting transition temperature of the cuprates and the versatile magnetic properties of the colossal-magnetoresistance manganites. However, apart from exploratory work, the in-depth investigation of their unusual properties has only just begun. Here we present neutron reflectometry measurements of a [Y(0.6)Pr(0.4)Ba(2)Cu(3)O(7) (10 nm)/La(2/3)Ca(1/3)MnO(3) (10 nm)](10) superlattice, which reveal a surprisingly large superconductivity-induced modulation of the vertical ferromagnetic magnetization profile. Most surprisingly, this modulation seems to involve the density rather than the orientation of the magnetization and is highly susceptible to the strain, which is transmitted from the SrTiO(3) substrate. We outline a possible explanation of this unusual superconductivity-induced phenomenon in terms of a phase separation between ferromagnetic and non-ferromagnetic nanodomains in the La(2/3)Ca(1/3)MnO(3) layers.
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Affiliation(s)
- J Hoppler
- Physics Department and Fribourg Center for Nanomaterials (FriMat), Fribourg University, Chemin du Musée 3, CH-1700 Fribourg, Switzerland
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Chakhalian J, Freeland JW, Habermeier HU, Cristiani G, Khaliullin G, van Veenendaal M, Keimer B. Orbital Reconstruction and Covalent Bonding at an Oxide Interface. Science 2007; 318:1114-7. [DOI: 10.1126/science.1149338] [Citation(s) in RCA: 388] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Marcuzzi A, Cristiani G, Castagnini L, Caroli A. [Preliminary experiences on triscaphoid arthrodesis]. MINERVA CHIR 1996; 51:537-45. [PMID: 8975159] [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: 02/03/2023]
Abstract
The authors report their experience of 5 patients (4 males, 1 female) with a mean age of 36.4 years (min 25 years, max 45 years), undergoing triscaphoid arthrodesis between May 1989 and August 1993. The patients suffered from rotatory dislocation of the scaphoid (1 case) and stage 3A of Kienboeck's disease according to Lichtman's classification (4 cases). The paper describes the surgical technique used for partial arthrodesis of the wrist performed using plexual anesthesia. A dorsal access route is used through a curved longitudinal skin incision corresponding to the anatomical site of the scaphoid. The skin flaps are then peeled back revealing the surface veins and sensitive branches of the radial nerve which are isolated and conserved. Having cut through the retinaculum of the extensors, the extensor tendons are spread so as to reach the joint capsule which is sectioned crosswise. After the bone to be fused have been exposed, the cartilage is removed from the joint faces between the scaphoid, trapezium and trapezoid and, using a osteotribe, the subchondral bone is removed to reveal the spongy bone, leaving a space of approximately 6 mm between the spongy surface of the bones to be fused. Arthodesis is stabilised using Kirschner wires or metal minicambres enclosing scaphoid, trapezium and trapezoid. Spongy tissue is taken from the distal radial head and used as a graft to fill the spaces created between them which will consolidate over time. The wrist is immobilised in a plaster cast for 8 weeks before starting functional rehabilitation. Patients were checked both clinically and radiographically with a mean follow-up of 36.4 months (min 25, max 50 months). Using the assessment criteria proposed by Minami et al. excellent results were obtained in 4 patients (80%) with the disappearance of painful symptoms, joint excursion 50% greater than the normal wrist, and hand grip 70% greater than in the controlateral hand. There was good radiographical consolidation of the arthrodesis. Poor results were only recorded in one case (20%) with persisting pain and functional impotent. Radio-scaphoid arthrosis was observed radiographically consequent to hypercorrection of the scaphoid with a radio-scaphoid angle of less than 45 degrees. The authors underline the technical difficulty of this arthrodesis characterised by reduction of the scaphoid in a correct position in which the radio-scaphoid angle must be 45 degrees when measured from a lateral position. Lastly, the authors conclude that this from of arthrodesis may be used with good results to treat wrist pathologies such as rotatory scaphoid dislocation, triscaphoid arthrosis and Kien-boeck's disease at stage 3A according to Lichtman. They also affirm that arthrodesis limited to the wrist is preferable to total arthrodesis because it enables some joint movement to be conserved which is important for hand function.
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Affiliation(s)
- A Marcuzzi
- Cattedra di Chirurgia della Mano, Università degli Studi, Modena
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Marcuzzi A, Cristiani G, Castagnini L, Castagnetti C, Caroli A. Partial arthrodeses of the wrist. Chir Organi Mov 1995; 80:157-69. [PMID: 7587517] [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
The authors report 16 cases of partial arthrodeses of the wrist for the treatment of Kienboeck's disease, pseudarthrosis of the scaphoid, rotatory subluxation of the scaphoid, rheumatoid arthritis, etc. Based on the good results obtained (76.6%) the authors believe that partial arthrodeses constitute the type of treatment indicated for the treatment of pathologies that involve only some of the carpal bones, and they also emphasize that this type of surgery represents a valid alternative to total arthrodesis of the wrist.
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Affiliation(s)
- A Marcuzzi
- Cattedra di Chirurgia della mano, Università degli Studi, Modena
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Caroli A, Adani R, Castagnetti C, Squarzina PB, Pancaldi G, Cristiani G. Replantation and revascularization of large segments of the hand and forearm. Ital J Orthop Traumatol 1991; 17:433-47. [PMID: 1816150] [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: 12/28/2022]
Abstract
From November 1985 to July 1989, the authors performed replantation or revascularization surgery on 18 patients in whom a large segment of the upper limb between the elbow and the palm of the hand had been either completely severed (9 cases) or incompletely severed with ischemia (9 cases). The operation was successful in 16 cases, and the authors were able to clinically review 14 patients (average follow-up, 23 months). The results were analyzed using a protocol based on the following parameters: range of motion, sensation, muscle strength, cold intolerance, pain, return to work, cosmesis, and the patient's level of satisfaction. The final outcome was rated excellent in 2 cases, good in 6 cases, fair in 3 cases, and poor in 3 cases. The authors point out that recovery of sensory and motor function in replantation of large portions of the hand and forearm is often difficult. Nevertheless, the good cosmetic result, the lack of pain, and the high probability of returning to work made the patients quite satisfied with this kind of reconstructive surgery.
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Affiliation(s)
- A Caroli
- Istituto Policattedra di Clinica Ortopedica e Traumatologica, Università di Modena
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Caroli A, Zanasi S, Marcuzzi M, Botticelli A, Pancaldi G, Marchetti M, Cristiani G, Adani R. Hemangioma of the hand. Chir Organi Mov 1991; 76:317-25. [PMID: 1800043] [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: 12/28/2022]
Abstract
The authors describe the anatomopathological and clinical findings of 24 cases of benign hemangioma of the hand. The instrumental methods used to diagnose hemangioma are discussed, and MRI imaging is given particular importance in the preoperative evaluation of the site, size, extent, and relationship with the surrounding tissues and any multiple locations of the vascular tumor. This evaluation is essential to perform a wide resection of the tumor, which is the only means of avoiding recurrence. After an average follow-up of 33 months (14-54) recurrence was observed in 7% of the cases treated.
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Affiliation(s)
- A Caroli
- Cattedra di Chirurgia della Mano, Università, Modena
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Caroli A, Zanasi S, Marcuzzi A, Guerra D, Cristiani G, Ronchetti IP. Epidemiological and structural findings supporting the fibromatous origin of dorsal knuckle pads. J Hand Surg Br 1991; 16:258-62. [PMID: 1960489 DOI: 10.1016/0266-7681(91)90049-t] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.2] [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
Epidemiological, optical and electron microscopical findings suggest that dorsal knuckle pads and Dupuytren's disease are fibrosing disorders with common features. In all cases examined, knuckle pads were always associated with Dupuytren's contracture and, in a significant number of cases, with bilateral Dupuytren's contracture. In a statistically significant number of patients with knuckle pads, Ledderhose's and Peyronie's diseases were also present (P less than 0.001). Optical and electron microscopical studies showed that cell types and extracellular matrix were identical in knuckle pads and Dupuytren's nodules in different patients.
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Affiliation(s)
- A Caroli
- Hand Surgery Unit, University of Modena, Italy
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Fruzzetti F, Melis GB, Mais V, Beconcini D, Paoletti AM, Cristiani G, Mian E, Fioretti P. High testosterone levels of ovarian origin affect adrenal steroidogenesis? J Clin Endocrinol Metab 1991; 72:426-31. [PMID: 1846875 DOI: 10.1210/jcem-72-2-426] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Androgens of ovarian origin have been suggested to affect adrenal enzymatic activity. To investigate this possibility, the 17-hydroxyprogesterone (17-OH P) and cortisol (F) responses to an ACTH stimulation test (0.25 mg iv, bolus) were evaluated in 10 normal women and in 39 hyperandrogenic women with normal (14 subjects) or high (25 subjects) testosterone (T) levels. The 17-OH P release and the ratio between 17-OH P and F release in response to the ACTH stimulation test were significantly higher (P less than 0.05) in hyperandrogenic women with high T levels than in normal subjects. Eight hyperandrogenic women with high T received intranasal GnRH agonist (Buserelin, 1200 micrograms/day) for 4 weeks, and the 17-OH P and F release in response to the ACTH stimulation was reassessed after agonist treatment. At the end of GnRH agonist administration the mean circulating levels of T were significantly reduced (P less than 0.05). The F response to the ACTH test was not modified by pretreatment with the GnRH agonist. The 17-OH P response to the ACTH stimulation test after the GnRH agonist was unchanged in comparison with control tests, as well as the ratio between 17-OH P and F responses to the ACTH test. These data do not seem to confirm, as previously suggested, that high T levels of ovarian origin affect adrenal steroidogenesis.
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Affiliation(s)
- F Fruzzetti
- Department of Obstetrics and Gynecology, University of Pisa, Italy
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16
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Cristiani G, Cerofolini E, Squarzina PB, Zanasi S, Leoni A, Romagnoli R, Caroli A. Evaluation of ischaemic necrosis of carpal bones by magnetic resonance imaging. J Hand Surg Br 1990. [PMID: 2366025 DOI: 10.1016/0266-7681(90)90132-n] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nine patients with chronic pain in the wrist were examined by M.R.I. to evaluate its accuracy in the detection of ischaemic necrosis of carpal bones. In seven patients, M.R.I. confirmed scintigraphic and radiographic signs of ischaemic necrosis. In two patients with radionuclide accumulations, M.R.I. did not confirm the diagnosis: in one, M.R.I. was totally normal and in the other it showed signs of a healing scaphoid fracture. From this limited experience, M.R.I. seems to be a sensitive imaging modality which is more specific than scintigraphy.
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Affiliation(s)
- G Cristiani
- Hand Surgery Unit, University of Modena, Italy
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Cristiani G, Cerofolini E, Squarzina PB, Zanasi S, Leoni A, Romagnoli R, Caroli A. Evaluation of Ischaemic Necrosis of Carpal Bones by Magnetic Resonance Imaging. Journal of Hand Surgery 1990; 15:249-55. [PMID: 2366025 DOI: 10.1016/0266-7681_90_90132-n] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Nine patients with chronic pain in the wrist were examined by M.R.I. to evaluate its accuracy in the detection of ischaemic necrosis of carpal bones. In seven patients, M.R.I. confirmed scintigraphic and radiographic signs of ischaemic necrosis. In two patients with radionuclide accumulations, M.R.I. did not confirm the diagnosis: in one, M.R.I. was totally normal and in the other it showed signs of a healing scaphoid fracture. From this limited experience, M.R.I. seems to be a sensitive imaging modality which is more specific than scintigraphy.
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Affiliation(s)
- G Cristiani
- Hand Surgery Unit, University of Modena, Italy
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Adani R, Castagnetti C, Cristiani G, Pancaldi G, Caroli A. Transfer in emergencies of the left ring finger to the right thumb. Case report. Scand J Plast Reconstr Surg Hand Surg 1989; 23:145-7. [PMID: 2814384 DOI: 10.3109/02844318909004508] [Citation(s) in RCA: 2] [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
The authors report a case of serious crushing of both hands treated in emergency situation with transfer of the left ring finger, which could not be replanted, to the right thumb, as well as revascularization of the four fingers of the right hand.
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Affiliation(s)
- R Adani
- Hand Surgery Unit, University of Modena, Italy
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Abstract
The authors describe a case of carpal tunnel syndrome due to Madelung's deformity. They discuss the pathophysiological causes of median nerve entrapment to explain the compression which occurs in this disease and its clinical implications. They take also into consideration the surgical approach to the carpal tunnel in this particular condition.
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Affiliation(s)
- R Luchetti
- Orthopaedic Clinic, University of Modena, Italy
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Abstract
High-level gymnastic training may cause clinical and radiographic changes in the wrist. A case is reported demonstrating bilateral closure of the ulnar side of the distal radius epiphyseal plate in a patient with a history of high-level gymnastic training. Cumulative microtrauma to the ulnar side of the distal radius epiphyseal plate may cause premature closure leading to a Madelung-like deformity.
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Affiliation(s)
- R Luchetti
- Orthopaedic Clinic, University of Modena, Italy
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Caroli A, Cristiani G, Squarzina PB, De Benedittis A. [Compression of the deep palmar branch of the ulnar nerve caused by an isolated neurofibroma. Presentation of a case]. Chir Organi Mov 1987; 72:381-4. [PMID: 3447829] [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: 01/05/2023]
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22
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Delaini C, Cristiani G, Barni C. [Preliminary observations in the treatment of various infections with netilmicin]. G Ital Chemioter 1984; 31:207-10. [PMID: 6468829] [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: 01/20/2023]
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23
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Minnicelli GC, Cristiani G. [Familial metaphyseal dysplasia or Pyle's disease. Description of 2 cases]. Chir Organi Mov 1982; 68:113-119. [PMID: 7187647] [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: 05/21/2023]
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Cristiani G, Gassend R, Augier H. Etude de la contamination experimentale de la phanerogame marine Posidonia oceanica (L.) delile par les composes mercuriques: Partie 1—Modalites de la contamination par le chlorure mercurique. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0143-1471(80)90062-8] [Citation(s) in RCA: 6] [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: 11/25/2022]
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25
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Mingione A, Monteleone M, Paruzzi G, Soragni O, Cristiani G, Moretti C, Mega W, Scanabissi F. Research in the use of cerebral gangliosides in neurolysis of the upper limb. Electromyogr Clin Neurophysiol 1979; 19:353-9. [PMID: 227655] [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: 12/13/2022]
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26
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Monteleone M, Scillone GB, Cristiani G. [Obstetrical detachment of lower femoral epiphysis]. Clin Ortop 1974; 25:75-83. [PMID: 4470039] [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: 01/10/2023]
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27
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Trentini GP, De Gaetani CF, Cristiani G. [Precancerous lesions of the larynx. Classification and histopathological and histochemical study of the supportive connective tissue]. Arch De Vecchi Anat Patol 1973; 59:55-90. [PMID: 4804235] [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: 01/12/2023]
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28
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Trentini GP, Barbieri Palmieri F, Cristiani G, Barbolini GC. Spleen-pineal gland correlations. Histomorphological and microfluoroscopic studies of the pineal gland in experimental methyl-cellulose hypersplenism. Ann Endocrinol (Paris) 1971; 32:361-70. [PMID: 5165515] [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: 01/14/2023]
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29
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Bellasio E, Vigevani A, Cristiani G. [Synthesis of trans-3-(3,4-dichlorophenyl)-4-methylazetidin-2-one and stereochemistry of various homologues]. Farmaco Sci 1970; 25:409-21. [PMID: 5455038] [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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30
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Bellasio E, Vigevani A, Cristiani G, Testa E. [Synthesis of trans-3-phenyl-4-methylazetidin-2-one and stereochemistry of various intermediates]. Farmaco Sci 1970; 25:347-61. [PMID: 5451639] [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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31
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Cristiani G, Smith P. [Surgical responses in major surgery of the aged. Our experience]. Prensa Med Argent 1970; 57:365-6. [PMID: 5517540] [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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32
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Bellasio E, Cristiani G, Testa E. [4-substituted azetidin-2-ones. II. 3,3-diphenyl-4-methylazetidin-2-one and 3,3-diphenyl-1,4-dimethylazetidin-2-one]. Farmaco Sci 1970; 25:3-9. [PMID: 5414137] [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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Bellasio E, Cristiani G, Cavalleri B. [Synthesis of alpha-monoalkyl substituted beta-bromopropionic acids]. Farmaco Sci 1969; 24:719-24. [PMID: 5806532] [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: 01/16/2023]
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Cristiani G. [Anal neoplasm. Considerations on 100 cases]. Prensa Med Argent 1967; 54:135-138. [PMID: 5614746] [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: 05/21/2023]
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36
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