1
|
Rammal A, Ezukwoke K, Hoayek A, Batton-Hubert M. Root cause prediction for failures in semiconductor industry, a genetic algorithm-machine learning approach. Sci Rep 2023; 13:4934. [PMID: 36973298 PMCID: PMC10043275 DOI: 10.1038/s41598-023-30769-8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/28/2023] [Indexed: 03/29/2023] Open
Abstract
Failure analysis has become an important part of guaranteeing good quality in the electronic component manufacturing process. The conclusions of a failure analysis can be used to identify a component's flaws and to better understand the mechanisms and causes of failure, allowing for the implementation of remedial steps to improve the product's quality and reliability. A failure reporting, analysis, and corrective action system is a method for organizations to report, classify, and evaluate failures, as well as plan corrective actions. These text feature datasets must first be preprocessed by Natural Language Processing techniques and converted to numeric by vectorization methods before starting the process of information extraction and building predictive models to predict failure conclusions of a given failure description. However, not all-textual information is useful for building predictive models suitable for failure analysis. Feature selection has been approached by several variable selection methods. Some of them have not been adapted for use in large data sets or are difficult to tune and others are not applicable to textual data. This article aims to develop a predictive model able to predict the failure conclusions using the discriminating features of the failure descriptions. For this, we propose to combine a Genetic Algorithm with supervised learning methods for an optimal prediction of the conclusions of failure in terms of the discriminant features of failure descriptions. Since we have an unbalanced dataset, we propose to apply an F1 score as a fitness function of supervised classification methods such as Decision Tree Classifier and Support Vector Machine. The suggested algorithms are called GA-DT and GA-SVM. Experiments on failure analysis textual datasets demonstrate the effectiveness of the proposed GA-DT method in creating a better predictive model of failure conclusion compared to using the information of the entire textual features or limited features selected by a genetic algorithm based on a SVM. Quantitative performances such as BLEU score and cosine similarity are used to compare the prediction performance of the different approaches.
Collapse
Affiliation(s)
- Abbas Rammal
- Ecole des Mines de Saint-Etienne, Mathematics and Industrial Engineering, Organisation and Environmental Engineering, Henri FAYOL Institute, 42023, Saint-Etienne, France.
| | - Kenneth Ezukwoke
- Ecole des Mines de Saint-Etienne, Mathematics and Industrial Engineering, Organisation and Environmental Engineering, Henri FAYOL Institute, 42023, Saint-Etienne, France
| | - Anis Hoayek
- Ecole des Mines de Saint-Etienne, Mathematics and Industrial Engineering, Organisation and Environmental Engineering, Henri FAYOL Institute, 42023, Saint-Etienne, France
| | - Mireille Batton-Hubert
- Ecole des Mines de Saint-Etienne, Mathematics and Industrial Engineering, Organisation and Environmental Engineering, Henri FAYOL Institute, 42023, Saint-Etienne, France
| |
Collapse
|
2
|
Rammal A, Assaf R, Goupil A, Kacim M, Vrabie V. Machine learning techniques on homological persistence features for prostate cancer diagnosis. BMC Bioinformatics 2022; 23:476. [DOI: 10.1186/s12859-022-04992-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 10/18/2022] [Indexed: 11/14/2022] Open
Abstract
AbstractThe rapid evolution of image processing equipment and techniques ensures the development of novel picture analysis methodologies. One of the most powerful yet computationally possible algebraic techniques for measuring the topological characteristics of functions is persistent homology. It's an algebraic invariant that can capture topological details at different spatial resolutions. Persistent homology investigates the topological features of a space using a set of sampled points, such as pixels. It can track the appearance and disappearance of topological features caused by changes in the nested space created by an operation known as filtration, in which a parameter scale, in our case the intensity of pixels, is increased to detect changes in the studied space over a range of varying scales. In addition, at the level of machine learning there were many studies and articles witnessing recently the combination between homological persistence and machine learning algorithms. On another level, prostate cancer is diagnosed referring to a scoring criterion describing the severity of the cancer called Gleason score. The classical Gleason system defines five histological growth patterns (grades). In our study we propose to study the Gleason score on some glands issued from a new optical microscopy technique called SLIM. This new optical microscopy technique that combines two classic ideas in light imaging: Zernike’s phase contrast microscopy and Gabor’s holography. Persistent homology features are computed on these images. We suggested machine learning methods to classify these images into the corresponding Gleason score. Machine learning techniques applied on homological persistence features was very effective in the detection of the right Gleason score of the prostate cancer in these kinds of images and showed an accuracy of above 95%.
Collapse
|
3
|
Goujon A, Schoentgen N, Betari R, Thoulouzan M, Vanalderwerelt V, Oumakhlouf S, Brichart N, Pradere B, Roumiguie M, Rammal A, Bensalah K, Fournier G, Bruyere F, Grise P, Joulin V, Manunta A, Saint F, Huyghe E, Nouhaud F, Peyronnet B. Prognostic factors after adrenalectomy for adrenal metastasis. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33197-9] [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] Open
|
4
|
Goujon A, Schoentgen N, Betari R, Thoulouzan M, Vanalderwerelt V, Oumakhlouf S, Brichart N, Pradere B, Roumiguie M, Rammal A, Soulie M, Fournier G, Bensalah K, Bruyere F, Grise P, Joulin V, Manunta A, Saint F, Huyghe E, Nouhaud FX, Peyronnet B. Prognostic factors after adrenalectomy for adrenal metastasis. Int Urol Nephrol 2020; 52:1869-1876. [PMID: 32419066 DOI: 10.1007/s11255-020-02496-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/28/2020] [Accepted: 05/04/2020] [Indexed: 12/13/2022]
Abstract
PURPOSE Very few studies have sought prognostic factors after adrenalectomy for metastasis. The aim of this study was to assess prognostic factors for oncological outcomes after adrenalectomy for adrenal metastasis. METHODS All adrenalectomies for metastases performed in seven centers between 2006 and 2016 were included in a retrospective study. Recurrence-free survival (RFS) and cancer-specific survival (CSS) were estimated using the Kaplan-Meier method. Prognostic factors for CSS and RFS were sought by Cox regression analyses. RESULTS 106 patients were included. The primary tumors were mostly renal (47.7%) and pulmonary (32.3%). RFS and CSS estimated rates at 5 years were 20.7% and 63.7%, respectively. In univariate analysis, tumor size (HR 3.83; p = 0.04) and the metastasis timing (synchronous vs. metachronous; HR 0.47; p = 0.02) were associated with RFS. In multivariate analysis, tumor size (HR 8.28; p = 0.01) and metastasis timing (HR 18.60; p = 0.002) were significant factors for RFS. In univariate analysis, the renal origin of the primary tumor (HR 0.1; p < 0.001) and the disease-free interval (DFI; HR 0.12; p = 0.02) were associated with better CSS, positive surgical margins with poorer CSS (HR 3.4; p = 0.01). In multivariate analysis, the renal origin of the primary tumor vs. pulmonary (HR 0.13; p = 0.03) and vs. other origins (HR 0.10; p = 00.4) and the DFI (HR 0.01; p = 0.009) were prognostic factors for CSS. CONCLUSION In this study, tumor size and synchronous occurrence of the adrenal metastasis were associated with poorer RFS. Renal origin of the primary tumor and longer DFI were associated with better CSS. These prognostic factors might help for treatment decision in the management of adrenal metastasis.
Collapse
Affiliation(s)
- A Goujon
- Department of Urology, CHU Rennes, Rennes, France.
| | | | - R Betari
- Department of Urology, CHU Amiens, Amiens, France
| | - M Thoulouzan
- Department of Urology, CHU Toulouse, Toulouse, France
| | | | | | - N Brichart
- Department of Urology, CH Orleans, Orléans, France
| | - B Pradere
- Department of Urology, CHU Tours, Tours, France
| | - M Roumiguie
- Department of Urology, CHU Toulouse, Toulouse, France
| | - A Rammal
- Department of Urology, CH Orleans, Orléans, France
| | - M Soulie
- Department of Urology, CHU Toulouse, Toulouse, France
| | - G Fournier
- Department of Urology, CHU Brest, Brest, France
| | - K Bensalah
- Department of Urology, CHU Rennes, Rennes, France
| | - F Bruyere
- Department of Urology, CHU Tours, Tours, France
| | - P Grise
- Department of Urology, CHU Rouen, Rouen, France
| | - V Joulin
- Department of Urology, CHU Brest, Brest, France
| | - A Manunta
- Department of Urology, CHU Rennes, Rennes, France
| | - F Saint
- Department of Urology, CHU Amiens, Amiens, France
| | - E Huyghe
- Department of Urology, CHU Toulouse, Toulouse, France
| | - F-X Nouhaud
- Department of Urology, CHU Rouen, Rouen, France
| | - B Peyronnet
- Department of Urology, CHU Rennes, Rennes, France
| |
Collapse
|
5
|
Peyronnet B, Schoentgen N, Betari R, Gryn A, Goujon A, Vanalderwerelt V, Oumakhlouf S, Thoulouzan M, Brichart N, Pradère B, Rammal A, Soulié M, Fournier G, Saint F, Bensalah K, Bruyère F, Joulin V, Nouhaud F, Huyghe E, Manunta A. L’origine de la tumeur primitive et la taille tumorale sont les deux facteurs pronostiques associés aux résultats oncologiques après surrénalectomie pour métastase surrénalienne. Prog Urol 2018. [DOI: 10.1016/j.purol.2018.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
6
|
Rammal A, Sey M, Khanna N, Gregor JC, Hussain N. A285 PREDICTORS FOR LOCAL RECURRENCE POST-ENDOSCOPIC MUCOSAL RESECTION(EMR) OF COLONIC LESION WITH 3CM IN SIZE OR MORE. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Rammal
- London health science centre, London, ON, Canada
| | - M Sey
- Western University, London, ON, Canada
| | - N Khanna
- Western University, London, ON, Canada
| | - J C Gregor
- Medicine, Los Alamos National Laboratory, London, ON, Canada
| | - N Hussain
- Western University, London, ON, Canada
| |
Collapse
|
7
|
Rammal A, Perrin E, Vrabie V, Assaf R, Fenniri H. Selection of discriminant mid-infrared wavenumbers by combining a naïve Bayesian classifier and a genetic algorithm: Application to the evaluation of lignocellulosic biomass biodegradation. Math Biosci 2017; 289:153-161. [PMID: 28511958 DOI: 10.1016/j.mbs.2017.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 06/18/2016] [Revised: 05/09/2017] [Accepted: 05/12/2017] [Indexed: 12/01/2022]
Abstract
Infrared spectroscopy provides useful information on the molecular compositions of biological systems related to molecular vibrations, overtones, and combinations of fundamental vibrations. Mid-infrared (MIR) spectroscopy is sensitive to organic and mineral components and has attracted growing interest in the development of biomarkers related to intrinsic characteristics of lignocellulose biomass. However, not all spectral information is valuable for biomarker construction or for applying analysis methods such as classification. Better processing and interpretation can be achieved by identifying discriminating wavenumbers. The selection of wavenumbers has been addressed through several variable- or feature-selection methods. Some of them have not been adapted for use in large data sets or are difficult to tune, and others require additional information, such as concentrations. This paper proposes a new approach by combining a naïve Bayesian classifier with a genetic algorithm to identify discriminating spectral wavenumbers. The genetic algorithm uses a linear combination of an a posteriori probability and the Bayes error rate as the fitness function for optimization. Such a function allows the improvement of both the compactness and the separation of classes. This approach was tested to classify a small set of maize roots in soil according to their biodegradation process based on their MIR spectra. The results show that this optimization method allows better discrimination of the biodegradation process, compared with using the information of the entire MIR spectrum, the use of the spectral information at wavenumbers selected by a genetic algorithm based on a classical validity index or the use of the spectral information selected by combining a genetic algorithm with other methods, such as Linear Discriminant Analysis. The proposed method selects wavenumbers that correspond to principal vibrations of chemical functional groups of compounds that undergo degradation/conversion during the biodegradation of lignocellulosic biomass.
Collapse
Affiliation(s)
- Abbas Rammal
- University of Reims Champagne-Ardenne (URCA), CReSTIC- Châlons, Chaussée du port, 51000 Châlons-en-Champagne, France.
| | - Eric Perrin
- University of Reims Champagne-Ardenne (URCA), CReSTIC- Châlons, Chaussée du port, 51000 Châlons-en-Champagne, France.
| | - Valeriu Vrabie
- University of Reims Champagne-Ardenne (URCA), CReSTIC- Châlons, Chaussée du port, 51000 Châlons-en-Champagne, France.
| | - Rabih Assaf
- University of Reims Champagne-Ardenne (URCA), CReSTIC- Châlons, Chaussée du port, 51000 Châlons-en-Champagne, France.
| | - Hassan Fenniri
- University of Reims Champagne-Ardenne (URCA), CReSTIC- Châlons, Chaussée du port, 51000 Châlons-en-Champagne, France.
| |
Collapse
|
8
|
Peyronnet B, Schoentgen N, Betari R, Gryn A, Goujon A, Grevez T, Oumakhlouf S, Thoulouzan M, Brichart N, Pradère B, Beauval J, Rammal A, Soulié M, Fournier G, Bruyère F, Grise P, Joulin V, Nouhaud F, Manunta A, Huyghe E, Bensalah K. Résultats de la surrénalectomie pour métastase surrénalienne de cancer du rein à l’ère de la néphrectomie totale avec préservation surrénalienne : une étude multicentrique. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
9
|
Tondut L, Peyronnet B, Vaessen C, Bernhard J, Doumerc N, Sèbe P, Pradère B, Guillonneau B, Nouhaud F, Brichart N, Alimi Q, Beauval J, Rammal A, De la Taille A, Baumert H, Droupy S, Bruyère F, Rouprêt M, Méjean A, Bensalah K. Impact du volume de cas par hôpital et par chirurgien sur les résultats de la néphrectomie partielle robot assistée : une étude multicentrique. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Delavierre D, Lemaire B, Corcia L, Ibrahim H, Rammal A, Brichart N, Kerdraon R. Prévalence du cancer du testicule dans une population d’hommes hypofertiles. À propos de 6 cas chez 1432 patients. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.139] [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]
|
11
|
Alimi Q, Seisen T, Bruyere F, Brichart N, Verhoest G, Graffeille V, Tondut L, Pradere B, Vanalderwerelt V, Rammal A, Vaessen C, Colin P, Roupret M, Bensalah K, Peyronnet B. Résultats périopératoires de la néphro-urétérectomie totale par voie laparoscopique pure versus robot assistée pour le traitement des tumeurs de la voie excrétrice urinaire supérieure. Prog Urol 2016. [DOI: 10.1016/j.purol.2016.07.018] [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
|
Rammal A, Perrin E, Chabbert B, Bertrand I, Habrant A, Lecart B, Vrabie V. Evaluation of Lignocellulosic Biomass Degradation by Combining Mid- and Near-Infrared Spectra by the Outer Product and Selecting Discriminant Wavenumbers Using a Genetic Algorithm. Appl Spectrosc 2015; 69:1303-1312. [PMID: 26647053 DOI: 10.1366/15-07928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Mid-infrared (MIR) and near-infrared (NIR) spectroscopy provide useful information on the molecular composition of biological systems. Because they are sensitive to organic and mineral components, there is a growing interest in these techniques for the development of biomarkers that reflect intrinsic characteristics of plants and their mode of degradation. Due to their complexity and complementary nature, an important challenge is the combining of MIR and NIR information to identify discriminating wavenumbers in each wavenumber region, with the ultimate goal of assessing the biodegradation process of a lignocellulosic biomass at different time scales. This work investigates the potential of using the outer product to combine MIR and NIR spectra to highlight the connections between fundamental molecular vibrations and their combinations and bonds. Because this operation yields high-dimensional spectra, we propose to use a genetic algorithm to select the most discriminant wavenumbers within the degradation process. The results from two lignocellulosic biomasses with different biodegradation kinetics, miscanthus aerial parts and maize roots, confirm that the outer product combination of MIR and NIR spectral information allows a better discrimination of the biodegradation kinetic compared with the simple concatenation of MIR and NIR spectra or with the use of MIR or MIR spectral information separately. We show that the genetic algorithm selects wavenumbers that correspond to principal vibrations of chemical functional groups of compounds that undergo degradation/conversion during the biodegradation of the lignocellulosic biomass.
Collapse
Affiliation(s)
- Abbas Rammal
- Université de Reims Champagne-Ardenne, CReSTIC-Châlons EA 3804, F-51000 Châlons-en-Champagne, France
| | | | | | | | | | | | | |
Collapse
|
13
|
Shostak K, Patrascu F, Göktuna SI, Close P, Borgs L, Nguyen L, Olivier F, Rammal A, Brinkhaus H, Bentires-Alj M, Marine JC, Chariot A. MDM2 restrains estrogen-mediated AKT activation by promoting TBK1-dependent HPIP degradation. Cell Death Differ 2014; 21:811-24. [PMID: 24488098 DOI: 10.1038/cdd.2014.2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 12/18/2013] [Accepted: 12/23/2013] [Indexed: 12/25/2022] Open
Abstract
Restoration of p53 tumor suppressor function through inhibition of its interaction and/or enzymatic activity of its E3 ligase, MDM2, is a promising therapeutic approach to treat cancer. However, because the MDM2 targetome extends beyond p53, MDM2 inhibition may also cause unwanted activation of oncogenic pathways. Accordingly, we identified the microtubule-associated HPIP, a positive regulator of oncogenic AKT signaling, as a novel MDM2 substrate. MDM2-dependent HPIP degradation occurs in breast cancer cells on its phosphorylation by the estrogen-activated kinase TBK1. Importantly, decreasing Mdm2 gene dosage in mouse mammary epithelial cells potentiates estrogen-dependent AKT activation owing to HPIP stabilization. In addition, we identified HPIP as a novel p53 transcriptional target, and pharmacological inhibition of MDM2 causes p53-dependent increase in HPIP transcription and also prevents HPIP degradation by turning off TBK1 activity. Our data indicate that p53 reactivation through MDM2 inhibition may result in ectopic AKT oncogenic activity by maintaining HPIP protein levels.
Collapse
Affiliation(s)
- K Shostak
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium
| | - F Patrascu
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium
| | - S I Göktuna
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium
| | - P Close
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium
| | - L Borgs
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Developmental Neurobiology Unit, GIGA-Neurosciences, GIGA-R, University of Liège, Liège, Belgium
| | - L Nguyen
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Developmental Neurobiology Unit, GIGA-Neurosciences, GIGA-R, University of Liège, Liège, Belgium [3] Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wallonia, Belgium
| | - F Olivier
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Animal Facility, University of Liege, CHU, Sart-Tilman, Liège 4000, Belgium
| | - A Rammal
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium
| | - H Brinkhaus
- Mechanisms of Cancer, Friedrich Miescher Institute for Biomedical Research (FMI), Basel, Switzerland
| | - M Bentires-Alj
- Mechanisms of Cancer, Friedrich Miescher Institute for Biomedical Research (FMI), Basel, Switzerland
| | - J-C Marine
- 1] Center for Human Genetics, KU Leuven, Leuven, Belgium [2] Center for the biology of disease, VIB, KU Leuven, Leuven, Belgium
| | - A Chariot
- 1] Interdisciplinary Cluster for Applied Genoproteomics, GIGA-Research, University of Liège, Liège, Belgium [2] Unit of Medical Chemistry, GIGA-Signal Transduction, GIGA-R, University of Liège, Liège, Belgium [3] Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wallonia, Belgium
| |
Collapse
|
14
|
Fournier G, Rammal A, Joulin V, Deruelle C, Rousseau B, Erauso A, Valeri A. VID-01.05: Transperitoneal laparoscopic prostatectomy: tips and tricks. Urology 2007. [DOI: 10.1016/j.urology.2007.06.629] [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: 10/22/2022]
|
15
|
Abstract
The coordination chemistry of model phenolic ligands (pyrocatechol, salicylic acid, and 2,2'-biphenol) that are able to form respectively five-, six-, or seven-membered rings with titanium(IV) alkoxides is investigated. With pyrocatechol, a polynuclear complex containing 10 Ti atoms was characterized with a not very common doubly bridging mu3-(O,O,O',O') coordination mode. With salicylic acid, a monomeric tris(chelate) complex was obtained. With 2,2'-biphenol, a polynuclear complex containing six Ti atoms was obtained showing both mu2-(O,O') and mu2-(O,O,O') coordination modes for the ligands. Intermolecular interactions in the solid state for these three new compounds are also quantitatively discussed using the partial charge model.
Collapse
Affiliation(s)
- K Gigant
- Laboratoire de Chimie Moléculaire de l'Etat Solide, Université Louis Pasteur, Institut le Bel, 4, Rue Blaise Pascal, 67070 Strasbourg Cedex, France
| | | | | |
Collapse
|
16
|
Rammal A, Brisach F, Henry M. Molecular recognition of titanium(IV) alkoxides by 2,6-bis(hydroxymethyl)-p-cresol in the crystal engineering of hybrid organic-inorganic networks. J Am Chem Soc 2001; 123:5612-3. [PMID: 11389659 DOI: 10.1021/ja0156136] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|