1
|
Keller S, Sedlacik J, Schuler T, Buchert R, Avanesov M, Zenouzi R, Lohse AW, Kooijman H, Fiehler J, Schramm C, Yamamura J. Prospective comparison of diffusion-weighted MRI and dynamic Gd-EOB-DTPA-enhanced MRI for detection and staging of hepatic fibrosis in primary sclerosing cholangitis. Eur Radiol 2018; 29:818-828. [PMID: 30014204 DOI: 10.1007/s00330-018-5614-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 04/09/2018] [Revised: 05/26/2018] [Accepted: 06/15/2018] [Indexed: 12/17/2022]
Abstract
PURPOSE To assess the diagnostic value of multiparametric magnetic resonance imaging (MRI) including dynamic Gd-EOB-DTPA-enhanced (DCE) and diffusion-weighted (DW) imaging for diagnosis and staging of hepatic fibrosis in primary sclerosing cholangitis (PSC) using transient elastography as a standard reference. MATERIAL AND METHODS Multiparametric MRI was prospectively performed on a 3.0-Tesla scanner in 47 patients (age 43.9±14.3 years). Transient elastography derived liver stiffness measurements (LSM), DCE-MRI derived parameters (hepatocellular uptake rate (Ki), arterial (Fa), portal venous (Fv) and total (Ft) blood flow, mean transit time (MTT), and extracellular volume (Ve)) and the apparent diffusion coefficient (ADC) were calculated. Correlation and univariate analysis of variance with post hoc pairwise comparison were applied to test for differences between LSM derived fibrosis stages (F0/F1, F2/3, F4). ROC curve analysis was used as a performance measure. RESULTS Both ADC and Ki correlated significantly with LSM (r= -0.614; p<0.001 and r= -0.368; p=0.01). The ADC significantly discriminated fibrosis stages F0/1 from F2/3 and F4 (p<0.001). Discrimination of F0/1 from F2/3 and F4 reached a sensitivity/specificity of 0.917/0.821 and 0.8/0.929, respectively. Despite significant inter-subject effect for classification of fibrosis stages, post hoc pairwise comparison was not significant for Ki (p>0.096 for F0/1 from F2/3 and F4). LSM, ADC and Ki were significantly associated with serum-based liver functional tests, disease duration and spleen volume. CONCLUSION DW-MRI provides a higher diagnostic performance for detection of hepatic fibrosis and cirrhosis in PSC patients in comparison to Gd-EOB-DTPA-enhanced DCE-MRI. KEY POINTS • Both ADC and hepatocellular uptake rate (Ki) correlate significantly with liver stiffness (r= -0.614; p<0.001 and r= -0.368; p=0.01). • The DCE-imaging derived quantitative parameter hepatocellular uptake rate (Ki) fails to discriminate pairwise intergroup differences of hepatic fibrosis (p>0.09). • DWI is preferable to DCE-imaging for discrimination of fibrosis stages F0/1 to F2/3 (p<0.001) and F4 (p<0.001).
Collapse
Affiliation(s)
- S Keller
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany. .,Department of Radiology, Charité, Charitéplatz 1, 10117, Berlin, Germany.
| | - J Sedlacik
- Department of Neuroradiology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - T Schuler
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany
| | - R Buchert
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany
| | - M Avanesov
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany
| | - R Zenouzi
- 1st Department of Medicine, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - A W Lohse
- 1st Department of Medicine, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - H Kooijman
- Philips Medical Systems, MR Clinical Science, Hamburg, Germany
| | - J Fiehler
- Department of Neuroradiology, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - C Schramm
- 1st Department of Medicine, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - J Yamamura
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf (UKE), Martinistr. 52, 20246, Hamburg, Germany
| |
Collapse
|
2
|
Kammer NN, Coppenrath E, Treitl KM, Kooijman H, Dietrich O, Saam T. Comparison of contrast-enhanced modified T1-weighted 3D TSE black-blood and 3D MP-RAGE sequences for the detection of cerebral metastases and brain tumours. Eur Radiol 2015; 26:1818-25. [PMID: 26334511 DOI: 10.1007/s00330-015-3975-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 05/13/2015] [Revised: 07/24/2015] [Accepted: 08/07/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVES To compare a modified T1-weighted 3D TSE black-blood sequence with sub-millimetre resolution (T1-mVISTA) with a magnetization-prepared rapid gradient echo (MP-RAGE) sequence for the diagnosis of cerebral malignomas. METHODS Forty-six patients with known or suspected intracranial tumours and 15 control patients were included in this retrospective study. All patients underwent T1-mVISTA (0.75-mm isotropic resolution, 4:43 min) and MP-RAGE (0.8-mm isotropic resolution, 4:46 minutes) at 3-Tesla in random order after application of contrast agent. Two experienced radiologists determined the number of lesions. Maximum diameter, diagnostic confidence (DC), visual assessment of contrast enhancement (VCE) and CNRlesion/parenchyma were assessed for each lesion. RESULTS Significantly more lesions were detected with T1-mVISTA compared to the MP-RAGE (61 vs. 36; p < 0.05). Further, DC and VCE was rated significantly higher in the T1-mVISTA (p < 0.05 and p < 0.001). Mean CNRlesion/parenchyma was twofold higher for T1-mVISTA (24.2 ± 17.5 vs. 12.7 ± 11.5, p < 0.001). The 25 lesions detected only in T1-mVISTA were significantly smaller than those detected in both sequences (4.3 ± 3.7 mm vs. 11.3 ± 10.7 mm; p < 0.01). CONCLUSIONS T1-mVISTA increases the contrast of lesions significantly compared to MP-RAGE and might therefore improve detection rates of small lesions in early stages of disease. KEY POINTS • T1-mVISTA leads to significantly higher contrast-to-noise ratios of cerebral malignomas. • T1-mVISTA detects significantly more metastatic lesions compared to 3D-MPRAGE. • Lesions detected only by T1-mVISTA are smaller than those detected in both sequences. • Diagnostic confidence is significantly higher for lesions detected by T1-mVISTA. • Application of T1-mVISTA might be of high relevance in early stages of disease.
Collapse
Affiliation(s)
- N N Kammer
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Nussbaumstr. 20, 80336, Munich, Germany.
| | - E Coppenrath
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Nussbaumstr. 20, 80336, Munich, Germany
| | - K M Treitl
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Nussbaumstr. 20, 80336, Munich, Germany
| | - H Kooijman
- Philips Healthcare, Luebeckertordamm 5, 20099, Hamburg, Germany
| | - O Dietrich
- Josef Lissner Laboratory for Biomedical Imaging, Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Marchioninistr 15, 81377, Munich, Germany
| | - T Saam
- Institute for Clinical Radiology, Ludwig-Maximilians-University Hospital Munich, Nussbaumstr. 20, 80336, Munich, Germany
| |
Collapse
|
3
|
Saam T, Maurus S, Kammer N, Kooijman H, Treitl M, Reiser M, Coppenrath E, Treitl K. Atem-getriggertes 3D-T1w-Black-Blood-MRT für die Diagnose der thorakalen Großgefäßvaskulitis: Eine Machbarkeitsstudie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550969] [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: 10/23/2022]
|
4
|
Kammer N, Coppenrath E, Treitl K, Kooijman H, Reiser M, Saam T. 3D T1w-Black-Blood MRT in der Diagnostik zerebraler Metastasen bei 3.0 Tesla. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551332] [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: 10/23/2022]
|
5
|
Kammer N, Coppenrath E, Kooijman H, Reiser MF, Saam T. Whole Brain 3D-Black-Blood 3T-MRI: Eine Pilotstudie in der bildgebenden Diagnostik zerebraler Vaskulitiden. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372906] [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: 10/25/2022]
|
6
|
Kording F, Schoennagel B, Much C, Ueberle F, Kooijman H, Yamamura J, Adam G, Wedegaertner U. MRT-Herzbildgebung mit neuem Triggerverfahren: MR kompatibles Doppler Ultraschall Gerät im Vergleich zum EKG. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346293] [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: 10/26/2022]
|
7
|
Edema JJH, Hoogenraad M, Schoonbeek FS, Kellogg RM, Kooijman H, Spek AL. Alkylation of the SCS linkage. Towards lipophilic mono- and ditopic heavy-metal receptors containing trithiane building blocks. Molecular structure of cis
-2,4,6-tribenzyl-1,3,5-trithiane. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19931120611] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
8
|
Suijkerbuijk BMJM, Schamhart DJ, Kooijman H, Spek AL, van Koten G, Klein Gebbink RJM. Mono(NCN-pincer palladium)-metalloporphyrin catalysts: evidence for supramolecular bimetallic catalysis. Dalton Trans 2010; 39:6198-216. [DOI: 10.1039/b925236n] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Łakomska I, Kooijman H, Spek AL, Shen WZ, Reedijk J. Mono- and dinuclear platinum(II) compounds with 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine. Structure, cytotoxic activity and reaction with 5'-GMP. Dalton Trans 2009:10736-41. [PMID: 20023903 DOI: 10.1039/b912404g] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mono- and dinuclear platinum(II) coordination compounds of formula cis-[PtCl(2)(NH(3))(dmtp)], 1, cis-[PtCl(2)(dmtp)(2)], 2 and {H(+)[C(28)H(32)Cl(2)N(16)Pt(2)](2+)(NO(3))(3)(H(2)O)(6)}, 3, in which dmtp is 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine have been synthesized and characterized by infrared and by (1)H, (13)C, (195)Pt NMR spectroscopy. The coordination units of the cationic species of formula [Pt(2)(mu-dmtp)(2)Cl(2)(dmtp)(2)](2+) are built up by two platinum atoms in a square-planar environment. Two sites are occupied by two 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (dmtp) bridging ligands which are linked to both metal atoms through their nitrogen atoms in positions 3 and 4. The other two positions are occupied by one monodentate 5,7-dimethyl-1,2,4-triazolo[1,5-a]pyrimidine (dmtp) molecule and a coordinated chloride. This compound is the first in which the same triazolopyrimidine ligand (dmtp) coordinates to a metal ion in two different ways, i.e. bridging bidentate and non-bridging monodentate. In addition, the interaction of compounds 1 and 2 with 5'-GMP was investigated in solution by (1)H NMR spectroscopy. The cytotoxicity of all the new platinum(II) compounds were studied by using two different cell lines: T47D (breast cancer) and HCV29T (bladder cancer).
Collapse
Affiliation(s)
- Iwona Łakomska
- Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100, Toruń, Poland.
| | | | | | | | | |
Collapse
|
10
|
Flapper J, Kooijman H, Lutz M, Spek AL, van Leeuwen PWNM, Elsevier CJ, Kamer PCJ. Nickel and Palladium Complexes of New Pyridine-Phosphine Ligands and Their Use in Ethene Oligomerization. Organometallics 2009. [DOI: 10.1021/om900038u] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [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]
Affiliation(s)
- Jitte Flapper
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Huub Kooijman
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Martin Lutz
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Anthony L. Spek
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Piet W. N. M. van Leeuwen
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Cornelis J. Elsevier
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| | - Paul C. J. Kamer
- van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, Dutch Polymer Institute, PO Box 902, 5600 AX Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K
| |
Collapse
|
11
|
Regier M, Schwarz D, Derlin T, Kooijman H, Hennigs J, Klose H, Adam G. Diffusionsgewichtete MRT und FDG-PET des nicht kleinzelligen Bronchialkarzinoms (NSCLC): Korreliert der Apparent Diffusion Coefficient (ADC) mit der Stoffwechselaktivität (SUV)? ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221584] [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: 10/20/2022]
|
12
|
Wedegärtner U, Yamamura J, Frisch M, Kooijman H, Huff A, Hecher K, Adam G. In-vivo Messungen der fetalen Blutsauerstoffsättigung im fetalen Schaf: eine Machbarkeitsstudie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221261] [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: 10/20/2022]
|
13
|
Yamamura J, Frisch M, Schnackenburg B, Kooijman H, Adam G, Wedegärtner U. MR Angiographie der fetalen Gefäße mit cardialer Triggerung: eine Machbarkeitsstudie am Schafsmodell. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221321] [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: 10/20/2022]
|
14
|
Buerke B, Bremer C, Kooijman H, Tombach B, Heindel W, Allkemper T. Bestimmung der optimalen „Keyhole-Percentage“ für die hochaufgelöste, kontrastmittelgestützte 3D-Keyhole-MRA: Ergebnisse einer experimentellen Studie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221604] [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: 10/20/2022]
|
15
|
Eberhard MR, van Vliet B, Durán Páchon L, Rothenberg G, Eastham G, Kooijman H, Spek AL, Elsevier CJ. A Simple Building-Block Route to (Phosphanyl-carbene)palladium Complexes via Intermolecular Addition of Functionalised Phosphanes to Isocyanides. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200801067] [Citation(s) in RCA: 11] [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: 11/07/2022]
|
16
|
Frisch MF, Yamamura J, Kooijman H, Hecher K, Adam G, Wedegärtner U. Funktionelle MR-Bildgebung an fetalen Lämmern am 1,5T und 3,0T: Signaländerungen von delta R2* im fetalen Gehirn und Lunge unter Hypoxie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221268] [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: 10/20/2022]
|
17
|
Flapper J, Kooijman H, Lutz M, Spek AL, van Leeuwen PWNM, Elsevier CJ, Kamer PCJ. Nickel and Palladium Complexes of Pyridine−Phosphine Ligands as Ethene Oligomerization Catalysts. Organometallics 2009. [DOI: 10.1021/om800903n] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jitte Flapper
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Huub Kooijman
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Martin Lutz
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Anthony L. Spek
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Piet W. N. M. van Leeuwen
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Cornelis J. Elsevier
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Paul C. J. Kamer
- van 't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018WV Amsterdam, The Netherlands, School of Chemistry, University of St. Andrews, St. Andrews, Fife, Scotland KY16 9ST, U.K., Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands, and Dutch Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| |
Collapse
|
18
|
Marqués-Gallego P, den Dulk H, Brouwer J, Kooijman H, Spek AL, Roubeau O, Teat SJ, Reedijk J. Synthesis, Crystal Structure, Studies in Solution and Cytotoxicity of Two New Fluorescent Platinum(II) Compounds Containing Anthracene Derivatives as a Carrier Ligand. Inorg Chem 2008; 47:11171-9. [DOI: 10.1021/ic8014767] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Patricia Marqués-Gallego
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Hans den Dulk
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Jaap Brouwer
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Huub Kooijman
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Anthony L. Spek
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Olivier Roubeau
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Simon J. Teat
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| | - Jan Reedijk
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, Université Bordeaux 1, CNRS-CRPP UPR 8641, 115 Avenue Schweitzer 33600 Pessac, France, and ALS, Berkeley Laboratory, 1 Cyclotron Rd, MS2-400, Berkeley, California 94720
| |
Collapse
|
19
|
Quesada M, Prins F, Bill E, Kooijman H, Gamez P, Roubeau O, Spek A, Haasnoot J, Reedijk J. Counterion Effect on the Spin-Transition Properties of the Cation [Fe(btzx)3]2+(btzx=m-Xylylenebis(tetrazole)). Chemistry 2008; 14:8486-99. [DOI: 10.1002/chem.200800990] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
20
|
Siegler MA, Kooijman H, Spek AL. ( S)-6-Methyl-∊-caprolactone. Acta Crystallogr Sect E Struct Rep Online 2008; 64:o607. [PMID: 21201943 PMCID: PMC2960826 DOI: 10.1107/s1600536808004583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2008] [Accepted: 02/15/2008] [Indexed: 11/28/2022]
Abstract
The chiral title compound, C7H12O2, a lactone derivative, features a seven-membered ring that adopts a chair conformation. The crystal structure is stabilized by weak C—H⋯O interactions occurring in the (100) plane. The absolute configuration was assigned on the basis of the enantioselective synthesis.
Collapse
|
21
|
van Gorkum R, Berding J, Mills AM, Kooijman H, Tooke DM, Spek AL, Mutikainen I, Turpeinen U, Reedijk J, Bouwman E. The Synthesis, Structures and Characterisation of New Mixed‐Ligand Manganese and Iron Complexes with Tripodal, Tetradentate Ligands. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701280] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Remy van Gorkum
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands , Fax: +31‐71‐5274451
| | - Joris Berding
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands , Fax: +31‐71‐5274451
| | - Allison M. Mills
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, The Netherlands
| | - Huub Kooijman
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, The Netherlands
| | - Duncan M. Tooke
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, The Netherlands
| | - Anthony L. Spek
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, The Netherlands
| | - Ilpo Mutikainen
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki, P. O. Box 55, (A.I.Virtasen aukio 1), 00014 Helsinki, Finland
| | - Urho Turpeinen
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki, P. O. Box 55, (A.I.Virtasen aukio 1), 00014 Helsinki, Finland
| | - Jan Reedijk
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands , Fax: +31‐71‐5274451
| | - Elisabeth Bouwman
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P. O. Box 9502, 2300 RA Leiden, The Netherlands , Fax: +31‐71‐5274451
| |
Collapse
|
22
|
Schreiter D, Ries T, Begemann PG, Kooijman H, Brandl S, Klose H, Adam G, Regier M. Diffusionsgewichtete MRT mit Unterdrückung des Hintergrundsignals (DWIBS) zur Detektion von Lungenrundherden bei 1,5 Tesla: Erste Ergebnisse. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073590] [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: 10/21/2022]
|
23
|
Benisvy L, Gamez P, Fu WT, Kooijman H, Spek AL, Meijerink A, Reedijk J. Efficient near-UV photosensitization of the Tb(iii) green luminescence by use of 2-hydroxyisophthalate ligands. Dalton Trans 2008:3147-9. [DOI: 10.1039/b805507f] [Citation(s) in RCA: 23] [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: 11/21/2022]
|
24
|
Regier M, Schreiter D, Kooijman H, Kaul MG, Begemann PG, Brandl S, Klose H, Adam G. Stellenwert der Diffusionsgewichteten Bildgebung in der Differenzierung histologischer Subtypen des Brochialkarzinoms. ROFO-FORTSCHR RONTG 2008. [DOI: 10.1055/s-2008-1073520] [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: 10/21/2022]
|
25
|
Siegler MA, Kooijman H, Spek AL. (4aS,5R,7R,8S,8aR)-8-(1,3-Dioxolan-2-yl)-7,8-dimethyl-5-(1-methyl-ethen-yl)perhydro-naphthalen-2-one. Acta Crystallogr Sect E Struct Rep Online 2007; 64:o337. [PMID: 21200898 PMCID: PMC2915378 DOI: 10.1107/s1600536807067335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 12/10/2007] [Accepted: 12/17/2007] [Indexed: 12/02/2022]
Abstract
In the chiral title compound, C(18)H(28)O(3), the two six-membered rings of the perhydronaphthalenone adopt a rigid chair-chair conformation and the five-membered dioxolanyl ring adopts an envelope conformation. The crystal structure is stabilized only by weak inter-actions.
Collapse
Affiliation(s)
- Maxime A. Siegler
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Huub Kooijman
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Anthony L. Spek
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| |
Collapse
|
26
|
Ligthart GBWL, Guo D, Spek AL, Kooijman H, Zuilhof H, Sijbesma RP. Ureidobenzotriazine Multiple H-Bonding Arrays: The Importance of Geometrical Details on the Stability of H-Bonds. J Org Chem 2007; 73:111-7. [DOI: 10.1021/jo7019338] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. B. W. L. Ligthart
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Dawei Guo
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - A. L. Spek
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Huub Kooijman
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| | - Rint P. Sijbesma
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands, The Research Institute of Petroleum Processing, Beijing 100083, People's Republic of China, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands, and Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
| |
Collapse
|
27
|
Garza-Ortiz A, den Dulk H, Brouwer J, Kooijman H, Spek AL, Reedijk J. The synthesis, chemical and biological properties of dichlorido(azpy)gold(III) chloride (azpy=2-(phenylazo)pyridine) and the gold-induced conversion of the azpy ligand to the chloride of the novel tricyclic pyrido[2,1-c][1,2,4]benzotriazin-11-ium cation. J Inorg Biochem 2007; 101:1922-30. [PMID: 17637477 DOI: 10.1016/j.jinorgbio.2007.05.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 03/22/2007] [Revised: 05/09/2007] [Accepted: 05/09/2007] [Indexed: 10/23/2022]
Abstract
A new Au(III) coordination compound with the ligand 2-(phenylazo)pyridine has been synthesized and fully characterized by means of elemental analysis, IR, UV-visible, conductivity measurements, NMR, electrospray ionization (ESI-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES). The chemical stability of the cation in this compound, [Au(azpy)Cl(2)](+) (abbreviated: Au-azpy), was analyzed by means of several physicochemical methods. While stable in the solid state, stability studies performed with the gold compound in solution showed an unexpected and unprecedented reactivity. A cationic organic derivative of 2-(phenylazo)pyridine, (abbreviated: pyrium), was produced from the solution and has been isolated as its chloride salt and characterized by crystal structure determination, elemental analysis, NMR, ESI-MS and conductivity studies in solution. This cyclization reaction is reported for the first time in the case of gold coordination compounds. The Au adduct and the pyrium cation were investigated as potential cytotoxic and anticancer agents, and both show moderate to high cytotoxic properties in cisplatin-sensitive and cisplatin-resistant ovarian carcinoma cell lines, A2780; and cisplatin-sensitive and cisplatin-resistant murine lymphocytic leukemia cell lines, L1210. Significant anticancer activity against the cisplatin resistant cell lines was found for the pyrium salt, ruling out the occurrence of cross resistance phenomena.
Collapse
Affiliation(s)
- Ariadna Garza-Ortiz
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | | | | | | | | | | |
Collapse
|
28
|
Habermann CR, Gossrau P, Kooijman H, Graessner J, Cramer MC, Kaul MG, Reitmeier F, Jaehne M, Adam G. Monitoring of gustatory stimulation of salivary glands by diffusion-weighted MR imaging: comparison of 1.5T and 3T. AJNR Am J Neuroradiol 2007; 28:1547-51. [PMID: 17846209 PMCID: PMC8134380 DOI: 10.3174/ajnr.a0587] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND PURPOSE Our aim was to compare different field strengths monitoring physiologic changes due to oral stimulation of parotid glands by using diffusion-weighted (DW) echo-planar imaging (EPI). MATERIALS AND METHODS Twenty-seven healthy volunteers were examined with a DW-EPI sequence at 1.5T and 3T before and after oral stimulation with commercially available lemon juice. The b factors used were 0, 500, and 1000 s/mm(2). Apparent diffusion coefficient (ADC) maps were evaluated with a manually placed region of interest including the entire parotid gland. For comparison of results, a Student t test was used on the basis of the mean of the volunteer median values. To compare both field strengths, we calculated the Pearson correlation coefficient (r). RESULTS DW-EPI MR imaging visualized the parotid glands of all volunteers. With 1.5T, the mean ADC before stimulation was 1.12 x 10(-3) mm(2)/s +/- 0.08 x 10(-3) mm(2)/s. After stimulation with lemon juice, the ADC increased to 1.18 x 10(-3) mm(2)/s +/- 0.09 x 10(-3) mm(2)/s. For 3T, the ADC before stimulation was 1.14 x 10(-3) mm(2)/s +/- 0.04 x 10(-3) mm(2)/s, with an increase to 1.17 x 10(-3) mm(2)/s +/- 0.05 x 10(-3) mm(2)/s after stimulation. For both field strengths, the increase in ADC after stimulation was significant (P < .001). High correlations between both field strengths were found pre- and poststimulation (r = 0.955, and 0.936, respectively). CONCLUSION DW-EPI MR imaging allows monitoring of physiologic changes due to oral stimulation of parotid glands by using DW imaging with high correlation between 1.5T and 3T.
Collapse
Affiliation(s)
- C R Habermann
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Chang T, Pieterse K, Broeren MAC, Kooijman H, Spek AL, Hilbers PAJ, Meijer EW. Structural Elucidation of Dendritic Host–Guest Complexes by X-ray Crystallography and Molecular Dynamics Simulations. Chemistry 2007; 13:7883-9. [PMID: 17614308 DOI: 10.1002/chem.200700572] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 11/06/2022]
Abstract
The multiple monovalent binding of adamantyl-urea poly(propyleneimine) dendrimers with carboxylic acid-urea guests was investigated using molecular dynamics simulations and X-ray crystallography to better understand the structure and behavior of the dynamic multivalent complex in solution. The results from the two methods are consistent and suggest a preferred molecular picture of this complicated aggregate of multiple components. The guest molecules can bind to the dendrimer in a variety of ways although most involve hydrogen-bonding interactions between urea groups of the dendrimer with urea and/or carboxylic acid groups of the guest. In addition, acid-base interactions between the carboxylic acid of the guest and the tertiary amine in the interior of the dendritic host are present. Our proposed structure gives important information about the predominant dynamic interactions between the host and guest and illustrates how they fit together and interact with each other.
Collapse
Affiliation(s)
- Theresa Chang
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
30
|
Matthews JR, Goldoni F, Kooijman H, Spek AL, Schenning APHJ, Meijer EW. Metal Coordination and Aggregation Properties of Chiral Polythiophenes and Polythienylethynylenes. Macromol Rapid Commun 2007. [DOI: 10.1002/marc.200700399] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
31
|
Prins F, Pasca E, de Jongh LJ, Kooijman H, Spek AL, Tanase S. Long-Range Magnetic Ordering in a TbIII–MoV Cyanido-Bridged Quasi-One-Dimensional Complex. Angew Chem Int Ed Engl 2007; 46:6081-4. [PMID: 17623290 DOI: 10.1002/anie.200701847] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ferry Prins
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, PO Box 9502, 2300 RA, Leiden, The Netherlands
| | | | | | | | | | | |
Collapse
|
32
|
Prins F, Pasca E, de Jongh L, Kooijman H, Spek A, Tanase S. Long-Range Magnetic Ordering in a TbIII–MoV Cyanido-Bridged Quasi-One-Dimensional Complex. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701847] [Citation(s) in RCA: 7] [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: 11/09/2022]
|
33
|
Katayama H, de Greef TF, Kooijman H, Spek AL, Vekemans JA, Meijer E. Toward poly(aminophthalimide), structures of dimers and trimers. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.04.002] [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: 11/16/2022]
|
34
|
Hubregtse T, Kooijman H, Spek AL, Maschmeyer T, Sheldon RA, Arends IWCE, Hanefeld U. Study on the isomerism in meso-amavadin and an amavadin analogue. J Inorg Biochem 2007; 101:900-8. [PMID: 17400295 DOI: 10.1016/j.jinorgbio.2007.02.006] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Revised: 02/12/2007] [Accepted: 02/13/2007] [Indexed: 11/19/2022]
Abstract
An X-ray crystallographic study of 'meso-amavadin' revealed that in the crystal the negatively charged anionic species of the title compound join into infinite hydrogen-bonded chains, counterbalanced by cationic hydronium species. Along with water of crystallization a three-dimensional hydrogen-bonded network is formed. Based on NMR- and X-ray data of amavadin and 'meso-amavadin', a model was developed that accounts for the structure of amavadin-type complexes, i.e. vanadium(IV) non-oxo complexes that contain two ligands with a tridentate N-hydroxyiminodiacetate backbone. The model describes the different arrangements of the two ligands around the vanadium and it accounts for eventual symmetry in the complex. The model was used for the interpretation of NMR-data of an amavadin analogue with a benzyl group at the ligand backbone.
Collapse
Affiliation(s)
- Ton Hubregtse
- Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL, Delft, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
35
|
Aromí G, Gamez P, Krzystek J, Kooijman H, Spek AL, MacLean EJ, Teat SJ, Nowell H. Novel Linear Transition Metal Clusters of a Heptadentate Bis-β-diketone Ligand. Inorg Chem 2007; 46:2519-29. [PMID: 17326626 DOI: 10.1021/ic062075v] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [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: 11/29/2022]
Abstract
The synthesis and the structure of the new potentially heptadentate ligand 1,3-bis-(3-oxo-3-(2-hydroxyphenyl)-propionyl)-2-methoxybenzene (H5L) is described. The reaction in pyridine or DMF of this ligand with various M(AcO)2 salts (M = NiII, CoII, MnII) leads to very different products depending on the metal. Thus, the dinuclear complexes [M2(H3L)2(py)4] (M = NiII, 1; CoII, 2) or the linear zigzag tetranuclear clusters [Mn4(H2L)2(AcO)2(py)5] (3) and [Mn4(H2L)2(AcO)2(dmf)4] (4) have been synthesized and characterized crystallographically. Slow oxidation of complex 3 leads to the formation of the novel mixed-valence linear complex [Mn3(HL)2(py)6] (5), displaying an unprecedented asymmetric MnIIIMnIIIMnII topology. The coordination geometry of complexes 1 to 5 has been analyzed and discussed by means of continuous shape measures. Magnetic measurements of 3 and 5 demonstrate that the metals within these complexes weakly interact magnetically with coupling constants of J1 = -1.13 cm-1 and J2 = -0.43 cm-1 (S = 0) for complex 3 and J1 = -5.4 cm-1 and J2 = -0.4 cm-1 (S = 5/2) for complex 5 (using the H = -Sigma2JijSiSj convention). These results are consistent with X-band EPR measurements on these compounds.
Collapse
Affiliation(s)
- Guillem Aromí
- Departament de Química Inorgànica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain.
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Wilkinson P, Vos E, Konijn G, Kooijman H, Mosca G, Tonon L. Distillation Trays that Operate Beyond the Limits of Gravity by Using Centrifugal Separation. Chem Eng Res Des 2007. [DOI: 10.1205/cherd06103] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
37
|
Stol M, Snelders DJM, Kooijman H, Spek AL, van Klink GPM, van Koten G. A new, easily recyclable arylating agent based on a diphosphino-digold(i) complex. Dalton Trans 2007:2589-93. [PMID: 17563795 DOI: 10.1039/b701271c] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of two organogold(I) complexes, [(Au(NCN))2(dppbp)] (6) and [(Au(Phebox))2(dppbp)] (9), and their application in subsequent transmetalating reactions are described. A trinuclear organogold(I) complex, [(AuCl)3(tdpppb)] (4) is also reported, which exhibits a surprisingly high solubility in dichloromethane. It was found that 6 and 9 can cleanly transfer the anionic NCN-([C(6)H(3)(CH(2)NMe(2))2-2,6]-) or Phebox-([2,6-bis(oxazolinyl)phenyl]-) moiety to Ti(IV) and Pd(II) centers, respectively. The coproduct [(AuCl)2(dppbp)] (3, dppbp is [4-Ph(2)PC(6)H(4)]2 (1)) formed during this transmetalation reaction, precipitates almost quantitatively from the reaction mixture (toluene) and can thus be separated by simple filtration. In comparison, [AuCl(PPh3)], formed as the coproduct in the transmetalation reaction of [Au(NCN)(PPh3)] with metal salts, has a higher solubility in apolar solvents and thus is more difficult to separate from the resultant organometallic complex. Digold complex 6 has been characterized by NMR spectroscopy and crystallographic analyses. These analyses show that the two gold units are essentially independent. The formation of a dimetallic transmetalating agent based on gold(I) had no effect on its transmetalating properties.
Collapse
Affiliation(s)
- Marianne Stol
- Organic Chemistry and Catalysis, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | | | | | | | | | | |
Collapse
|
38
|
Angamuthu R, Kooijman H, Lutz M, Spek AL, Bouwman E. Hexanuclear [Ni6L12] metallacrown framework consisting of NiS4 square-planar and NiS5 square-pyramidal building blocks. Dalton Trans 2007:4641-3. [DOI: 10.1039/b713668b] [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: 11/21/2022]
|
39
|
|
40
|
Quesada M, Kooijman H, Gamez P, Sánchez Costa J, van Koningsbruggen PJ, Weinberger P, Reissner M, Spek AL, Haasnoot JG, Reedijk J. [Fe(µ-btzmp)2(btzmp)2](ClO4)2: a doubly-bridged 1D spin-transition bistetrazole-based polymer showing thermal hysteresis behaviour. Dalton Trans 2007:5434-40. [DOI: 10.1039/b709460d] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
Abstract
A brief historic overview of Pt/Sn-catalyzed hydroformylation as well as recent advances in the hydroformylation of internal alkenes is provided. This serves as background for the results obtained with the [Pt(Sixantphos)Cl(2)] system, for which the molecular structure and the spectroscopic data are described. Insitu UV/Vis-spectroscopic studies have revealed rapid formation of the corresponding Pt-stannate complex upon reaction with SnCl(2), whereas high-pressure insitu IR-spectroscopy showed formation of a Pt-CO species and a short-lived Pt-H species under syngas, as well as rapid evolution of aldehyde product upon addition of 1-octene to the preformed catalyst in the IR autoclave. The hydroformylation of 1-octene and the i-octenes has been performed. For the internal alkenes, selective tandem isomerization/hydroformylation towards n-nonanal is observed with this catalyst system.
Collapse
Affiliation(s)
- Ruben van Duren
- Laboratory of Homogeneous Catalysis, Eindhoven University of Technology, Den Dolech 2, 5600, MB Eindhoven, The Netherlands
| | | | | | | | | |
Collapse
|
42
|
Wedegärtner U, Popovych S, Yamamura J, Kooijman H, Adam G. In vivo T2 MR-Messungen zur Bestimmung der fetalen Blut-Sauerstoffsättigung während Hypoxie bei Schaf-Feten: eine Machbarkeitsstudie. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976869] [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: 10/21/2022]
|
43
|
Kooijman H, Tanase S, Bouwman E, Reedijk J, Spek AL. Bis[bis(2-pyridylcarbonyl)aminato]iron(III) perchlorate acetonitrile disolvate. Acta Crystallogr C 2006; 62:m510-2. [PMID: 17088611 DOI: 10.1107/s0108270106037310] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Accepted: 09/13/2006] [Indexed: 11/11/2022] Open
Abstract
The title compound, [Fe(C12H8N3O2)2]ClO4.2C2H3N, contains Fe(III) in a distorted octahedral coordination environment, with the Fe-N(pyridine) bonds significantly longer than the Fe-N(amine) bonds. The crystal packing involves a bifurcated C-H...(O,O) contact that is also found in all other [M(C12H8N3O2)2] complexes reported previously.
Collapse
Affiliation(s)
- Huub Kooijman
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
| | | | | | | | | |
Collapse
|
44
|
Godbole MD, Roubeau O, Mills AM, Kooijman H, Spek AL, Bouwman E. High-Nuclearity Manganese and Iron Complexes with the Anionic Ligand Methyl Salicylimidate. Inorg Chem 2006; 45:6713-22. [PMID: 16903727 DOI: 10.1021/ic0605322] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The three novel clusters [Mn6O4(OMe)2(OAc)4(Mesalim)4] (3), [Mn8O2(OH)2(OMe)12(OAc)2(Mesalim)4] (4), and [Fe10O4(OMe)14Cl2(Mesalim)6] (5) have been synthesized from a simple bidentate ligand HMesalim (HMesalim = methyl salicylimidate). Starting from the mononuclear complex [Mn(Mesalim)2(OAc)(MeOH)].MeOH (1), either the hexanuclear complex 3 or the octanuclear complex 4 is obtained after recrystallization, depending upon the reaction conditions and solvents used. Similarly, starting from the purple-colored mononuclear complex [Fe(Mesalim)2Cl] (2), the orange-colored decanuclear iron(III) cluster 5 has been obtained upon recrystallization from methanol. Complex 3, which could also be prepared directly from manganese acetate and the ligand, has a face-sharing double-cubane [Mn6O6] core, unique in transition metal chemistry. Compounds 4 and 5 are composed of [M3O4] partial cubanes. All complexes belong to a class of oxo-bridged cubic close-packed molecular clusters resembling the metal oxide/hydroxide ores. Complex 4 exhibits intramolecular ferromagnetic interactions, as evidenced from dc magnetic susceptibility studies (1.8-300 K), resulting in a high-spin ground state, probably with S(T) = 8. Complex 4 displays single molecule magnet behavior as indicated by frequency and temperature dependences of its ac susceptibility. An Arrhenius plot gave relatively large experimental activation energy of 36.0 K. The magnetic properties of complexes 3 and 5 are dominated by antiferromagnetic interactions leading to zero-spin ground states.
Collapse
Affiliation(s)
- Meenal D Godbole
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | | | | | | | | | | |
Collapse
|
45
|
Aromí G, Gamez P, Boldron C, Kooijman H, Spek AL, Reedijk J. A Zig-Zag [MnII4] Cluster from a Novel Bis(β-diketonate) Ligand. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200600105] [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: 02/02/2023]
|
46
|
Buskens E, Meijboom MJ, Kooijman H, Van Hout BA. The use of a surgical sealant (CoSeal) in cardiac and vascular reconstructive surgery: an economic analysis. J Cardiovasc Surg (Torino) 2006; 47:161-70. [PMID: 16572090] [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: 05/08/2023]
Abstract
AIM We designed a study to estimate the economic impact of CoSeal Surgical Sealant for the prevention of anastomotic bleeding in cardiac and vascular surgery. We also explored the potential economic value of CoSeal as a means of inhibiting the formation of pericardial tissue adhesions. METHODS A Delphi panel of 6 expert vascular and cardiac surgeons provided the assumptions and estimates needed to develop a decision analysis model to assess the impact of sealant on the costs associated with low- and high-risk forms of cardiac (valve replacement/reconstruction) and vascular (abdominal aortic aneurysm [AAA] repair, femoral bypass grafting) surgery. The primary outcome was incremental cost per patient. RESULTS For valve repair/replacement surgery, sealant was expected to confer cost-savings in high-risk but not low-risk procedures. Predicted cost savings for high-risk AAA repairs were substantial, but minimal in the overall AAA group. Cost-savings were predicted for sealant use in all femoral-popliteal ePTFE bypass grafts, but in high-risk femoral-femoral ePTFE bypass grafts only. CONCLUSIONS According to our decision analysis model, routine use of surgical sealant in select subgroups may confer considerable economic benefits to health service budgets. Future research should aim at testing this model in a real-world hospital setting. Assessment of the value of CoSeal in the prevention of postsurgical adhesions showed that expert surgeons see a need for effective prophylaxis. Further research into the clinical and economic benefit of this intervention is required.
Collapse
Affiliation(s)
- E Buskens
- Pharmerit BV, Rotterdam, The Netherlands.
| | | | | | | |
Collapse
|
47
|
Müller C, López LG, Kooijman H, Spek AL, Vogt D. Chiral bidentate phosphabenzene-based ligands: synthesis, coordination chemistry, and application in Rh-catalyzed asymmetric hydrogenations. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.01.049] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
48
|
Allkemper T, Heindel W, Kooijman H, Ebert W, Tombach B. CMR 2005: 2.01: High-field MRA with iron oxide blood-pool contrast agents: field strength effects on vascular contrast enhancement in rabbits at 1.5 and 3.0 T. Contrast Media Mol Imaging 2006. [DOI: 10.1002/cmmi.8] [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: 11/11/2022]
|
49
|
van Buijtenen J, Meuldijk J, Vekemans JAJM, Hulshof LA, Kooijman H, Spek AL. Dinuclear Ruthenium Complexes Bearing Dicarboxylate and Phosphine Ligands. Acceptorless Catalytic Dehydrogenation of 1-Phenylethanol. Organometallics 2006. [DOI: 10.1021/om050789s] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jeroen van Buijtenen
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Jan Meuldijk
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Jef A. J. M. Vekemans
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Lumbertus A. Hulshof
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Huub Kooijman
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Anthony L. Spek
- Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Process Development Group, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| |
Collapse
|
50
|
Stehling C, Bachmann R, Kooijman H, Nassenstein I, Vieth V, Heindel W, Fischbach R. Hochauflösende MR-Bildgebung des Kiefergelenks: Vergleich der Bildqualität bei 1,5 und 3 Tesla. ROFO-FORTSCHR RONTG 2006. [DOI: 10.1055/s-2006-941001] [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: 10/20/2022]
|