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Bouledjouidja A, Masmoudi Y, Sergent M, Badens E. Effect of operational conditions on the supercritical carbon dioxide impregnation of anti-inflammatory and antibiotic drugs in rigid commercial intraocular lenses. J Supercrit Fluids 2017. [DOI: 10.1016/j.supflu.2017.07.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sergent M, Perrin C, Ihmaine S, Perrin A, Ben Yaich H, Pena O, Chevrel R, Gougeon P, Potel M. Matériaux à clusters en chimie du solide. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1991882123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bouledjouidja A, Masmoudi Y, Sergent M, Trivedi V, Meniai A, Badens E. Drug loading of foldable commercial intraocular lenses using supercritical impregnation. Int J Pharm 2016; 500:85-99. [DOI: 10.1016/j.ijpharm.2016.01.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 01/06/2016] [Accepted: 01/08/2016] [Indexed: 11/24/2022]
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Gandolfi F, Malleret L, Sergent M, Doumenq P. Parameters optimization using experimental design for headspace solid phase micro-extraction analysis of short-chain chlorinated paraffins in waters under the European water framework directive. J Chromatogr A 2015; 1406:59-67. [PMID: 26129985 DOI: 10.1016/j.chroma.2015.06.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 04/02/2015] [Revised: 06/11/2015] [Accepted: 06/12/2015] [Indexed: 11/26/2022]
Abstract
The water framework directives (WFD 2000/60/EC and 2013/39/EU) force European countries to monitor the quality of their aquatic environment. Among the priority hazardous substances targeted by the WFD, short chain chlorinated paraffins C10-C13 (SCCPs), still represent an analytical challenge, because few laboratories are nowadays able to analyze them. Moreover, an annual average quality standards as low as 0.4μgL(-1) was set for SCCPs in surface water. Therefore, to test for compliance, the implementation of sensitive and reliable analysis method of SCCPs in water are required. The aim of this work was to address this issue by evaluating automated solid phase micro-extraction (SPME) combined on line with gas chromatography-electron capture negative ionization mass spectrometry (GC/ECNI-MS). Fiber polymer, extraction mode, ionic strength, extraction temperature and time were the most significant thermodynamic and kinetic parameters studied. To determine the suitable factors working ranges, the study of the extraction conditions was first carried out by using a classical one factor-at-a-time approach. Then a mixed level factorial 3×2(3) design was performed, in order to give rise to the most influent parameters and to estimate potential interactions effects between them. The most influent factors, i.e. extraction temperature and duration, were optimized by using a second experimental design, in order to maximize the chromatographic response. At the close of the study, a method involving headspace SPME (HS-SPME) coupled to GC/ECNI-MS is proposed. The optimum extraction conditions were sample temperature 90°C, extraction time 80min, with the PDMS 100μm fiber and desorption at 250°C during 2min. Linear response from 0.2ngmL(-1) to 10ngmL(-1) with r(2)=0.99 and limits of detection and quantification, respectively of 4pgmL(-1) and 120pgmL(-1) in MilliQ water, were achieved. The method proved to be applicable in different types of waters and show key advantages, such as simplicity, automation and sensitivity, required for the monitoring programs linked to the WFD.
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Affiliation(s)
- F Gandolfi
- Aix-Marseille Université, Laboratoire de Chimie de l'Environnement FRE CNRS 3416, Equipe Micropolluants Organiques, Europôle de l'Arbois, Bat. Villemin BP80, 13545 AIX-EN-PROVENCE Cedex 4, France
| | - L Malleret
- Aix-Marseille Université, Laboratoire de Chimie de l'Environnement FRE CNRS 3416, Equipe Micropolluants Organiques, Europôle de l'Arbois, Bat. Villemin BP80, 13545 AIX-EN-PROVENCE Cedex 4, France.
| | - M Sergent
- Aix-Marseille Université, Laboratoire d'Instrumentation et de Sciences Analytiques EA 4672, Campus Scientifique de St Jérôme, 13397 Marseille Cedex 20, France
| | - P Doumenq
- Aix-Marseille Université, Laboratoire de Chimie de l'Environnement FRE CNRS 3416, Equipe Micropolluants Organiques, Europôle de l'Arbois, Bat. Villemin BP80, 13545 AIX-EN-PROVENCE Cedex 4, France
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Rébufa C, Traboulsi A, Labed V, Dupuy N, Sergent M. Experimental design approach for identification of the factors influencing the γ-radiolysis of ion exchange resins. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.07.020] [Citation(s) in RCA: 6] [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: 10/24/2022]
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Regula C, Carretier E, Wyart Y, Sergent M, Gésan-Guiziou G, Ferry D, Vincent A, Boudot D, Moulin P. Ageing of ultrafiltration membranes in contact with sodium hypochlorite and commercial oxidant: Experimental designs as a new ageing protocol. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2012.10.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Traboulsi A, Dupuy N, Rebufa C, Sergent M, Labed V. Investigation of gamma radiation effect on the anion exchange resin Amberlite IRA-400 in hydroxide form by Fourier transformed infrared and 13C nuclear magnetic resonance spectroscopies. Anal Chim Acta 2012; 717:110-21. [DOI: 10.1016/j.aca.2011.12.046] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 12/15/2011] [Accepted: 12/21/2011] [Indexed: 11/26/2022]
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Regula C, Carretier E, Wyart Y, Sergent M, Gésan-Guiziou G, Vincent A. Ageing of Polysulfone Ultrafiltation Membranes for Drinking Water Production in Contact with Sodium Hypochlorite or Formulated Detergents. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proeng.2012.08.668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lacoeuille F, Hindré F, Venier-Julienne MC, Sergent M, Bouchet F, Jouaneton S, Denizot B, Askienazy S, Benoit JP, Couturier OF, Le Jeune JJ. A starch-based microparticulate system dedicated to diagnostic and therapeutic nuclear medicine applications. Biomaterials 2011; 32:7999-8009. [PMID: 21788070 DOI: 10.1016/j.biomaterials.2011.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 07/04/2011] [Indexed: 01/18/2023]
Abstract
The aim of this work was to develop a new microparticulate system able to form a complex with radionuclides with a high yield of purity for diagnostic or therapeutic applications. Owing to its properties potato starch was chosen as starting material and modified by oxidization and coupling of a ligand (polyamine) enabling modified starch to chelate radionuclides. The choice of suitable experiments was based on a combination of a Rechtschaffner experimental design and a surface response design to determine the influence of experimental parameters and to optimize the final product. Starch-based microparticle formulations from the experimental plans were compared and characterized through particle size analysis, scanning electron microscopy, elemental analysis and, for the most promising formulations, by in vitro labeling stability studies and determination of free polyamine content or in vivo imaging studies. The mechanism of starch-based microparticle degradation was identified by means of size measurements. The results of the Rechtschaffner design showed the positive qualitative effect of the temperature and the duration of coupling reaction whereas surface response analysis clearly showed that, by increasing the oxidization level and starch concentration, the nitrogen content in the final product is increased. In vitro and in vivo characterization led to identification of the best formulation. With a size around 30 μm, high radiochemical purity (over 95%) and a high signal-to-noise ratio (over 600), the new starch-based microparticulate system could be prepared as ready-to-use kits and sterilized without modification of its characteristics, and thus meet the requirement for in vivo diagnostic and therapeutic applications.
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Affiliation(s)
- F Lacoeuille
- LUNAM Université, Université d'Angers, Inserm U646, Centre Hospitalier Universitaire d'Angers, 4 rue Larrey, F 49100 Angers, France.
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Pottier E, Sergent M, Luu RPT, Guglielmetti R. Synthese De Quelques Spiro[Indoline-Naphtoxazines] Et Spiro[Indoline-Pyridobenzoxazines] Photochromiques. Application De La Methodologie De La Recherche Experimentale. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19921010810] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lequeux C, Auxenfans C, Mojallal A, Sergent M, Damour O. Optimization of a culture medium for the differentiation of preadipocytes into adipocytes in a monolayer. Biomed Mater Eng 2010; 19:283-91. [PMID: 20042795 DOI: 10.3233/bme-2009-0593] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
UNLABELLED Our objective was to optimize a medium for preadipocyte differentiation into adipocytes. METHODS The differentiation medium contains fixed components as well as 7 variable ones. To perform this study, different experiments were designed and the study was carried out in 4 stages. The first two stages tested the influence of serum, dexamethasone, hydrocortisone and an cAMP activator. In the third stage, two new variables were added: rosiglitazone and insulin. In the final stage, the medium selected in stage 3 was validated. The differentiation selection criteria consisted of the number of mature adipocytes and adiponectin secretion. RESULTS We have shown that each variable was indispensable and that positive interactions occurred between some variables. No negative interactions were found and it was possible to optimize the concentration of each variable. CONCLUSIONS We selected the following medium, which provides optimal adipocyte size and adiponectin secretion: DMEM/HAMF12+10% Foetal Clone Serum (FCS)+2 nM triiodothyronine+10 nM hydrocortisone +0.5 mM IsoButyl Methyl Xanthine (IBMX)+500 nM dexamethasone+1 microM rosiglitazone+0.15 UI/ml insulin+antibiotics.
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Affiliation(s)
- C Lequeux
- Laboratoire des Substituts Cutanés, Hôpital Edouard Herriot, Lyon, France
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Vasseur O, Claeys-Bruno M, Sergent M. Quality of high dimensional numerical “Space filling designs” for the sensitivity analysis of interference optical filters. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.sbspro.2010.05.216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Vanloot P, Coulomb B, Brach-Papa C, Sergent M, Boudenne JL. Multivariate optimization of solid-phase extraction applied to iron determination in finished waters. Chemosphere 2007; 69:1351-60. [PMID: 17604823 DOI: 10.1016/j.chemosphere.2007.05.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2006] [Revised: 05/08/2007] [Accepted: 05/13/2007] [Indexed: 05/16/2023]
Abstract
In this work, Amberlite XAD-4 resin functionalized with salicylic acid was synthetized, characterized and applied as a new packing material for an on-line system to iron determination in aqueous samples. The detection method is based on the sorption of Fe(III) ions in a minicolumn containing the synthesized resin, followed by a desorption step using an acid solution and measurement of iron by vis-spectrophotometry (CAS method). The optimization of the solid-phase extraction system was performed using factorial design and Doehlert matrix considering six variables: sample percolation rate (0.5-9 ml min(-1)), sample metal concentration (20-200 microg l(-1)), flow-through sample volume (0-5 ml) (all three directly linked to the extraction step), elution flow-rate (0.5-9 ml min(-1)), concentration and volume of eluent (HCl 0.1-0.5M) (all three directly linked to the elution step). The aim of this study was to obtain a set of operating ranges for the six variables tested in order to obtain--by means of a mathematical function allowing maximisation of each response (desirability function)--at least 90% of iron recovery rates. Using the experimental conditions defined in the optimization, the method allowed iron determination with achieved detection limit of 2.3 microgl(-1) and precision (assessed as the relative standard deviation) of 9.3-2.8% for iron solutions of 10.0-150 microgl(-1). Real samples (coming from a water treatment unit) were used successfully when evaluating potentialities of the developed SPE procedure coupled to a spectrophotometric determination.
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Affiliation(s)
- P Vanloot
- Laboratoire de Chimie et Environnement, FRE2704, Université de Provence - CNRS, Aix-Marseille I, 3 Place Victor Hugo, Case 29, 13331 Marseille Cedex 3, France
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Vanloot P, Boudenne JL, Vassalo L, Sergent M, Coulomb B. Experimental design approach for the solid-phase extraction of residual aluminium coagulants in treated waters. Talanta 2007; 73:237-45. [DOI: 10.1016/j.talanta.2007.03.030] [Citation(s) in RCA: 10] [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] [Received: 12/13/2006] [Revised: 03/03/2007] [Accepted: 03/15/2007] [Indexed: 10/23/2022]
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Vanloot P, Boudenne JL, Brach-Papa C, Sergent M, Coulomb B. An experimental design to optimize the flow extraction parameters for the selective removal of Fe(III) and Al(III) in aqueous samples using salicylic acid grafted on Amberlite XAD-4 and final determination by GF-AAS. J Hazard Mater 2007; 147:463-70. [PMID: 17284345 DOI: 10.1016/j.jhazmat.2007.01.039] [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] [Subscribe] [Scholar Register] [Received: 08/18/2006] [Revised: 10/09/2006] [Accepted: 01/08/2007] [Indexed: 05/13/2023]
Abstract
In this paper, a multivariable approach has been applied for the selective removing of Fe(III) and Al(III), in the range 0-200 microg l(-1), in water samples onto a modified organic support (salicylic acid grafted on XAD-4). An empirical mathematical model was designed which establishes the relationship between the variation of the responses (extraction yields), and the variation of three factors (sample volume, sample percolation flow rate and amount of metallic ions present in the sample). To estimate the coefficients of the developed model, an uniform shell Doehlert design has been applied; these experiments consisted in GF-AAS determination of aluminium and iron amounts in eluates after percolation of samples through modified support. Results show a similar behaviour of the resin towards aluminium and iron with a preponderant effect of the percolation flow rate value; however this one is crucial for aluminium extraction and should be maintained below to 0.55 ml min(-1) to reach a 95% Al3+ extraction yield (versus 2.25 ml min(-1) for Fe3+). The optima determined by this experimental design approach have been further applied to the selective extraction of aluminium and iron from multielement synthetic samples and from real samples at the outlet of potable water treatment units.
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Affiliation(s)
- P Vanloot
- Laboratoire de Chimie et Environnement, FRE2704, Université de Provence, CNRS, Aix-Marseille I, 3 Place Victor Hugo, Case 29, 13331 Marseille Cedex 3, France
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Buco S, Moragues M, Sergent M, Doumenq P, Mille G. An experimental design approach for optimizing polycyclic aromatic hydrocarbon analysis in contaminated soil by pyrolyser-gas chromatography-mass spectrometry. Environ Res 2007; 104:209-15. [PMID: 17418818 DOI: 10.1016/j.envres.2004.06.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2004] [Revised: 06/02/2004] [Accepted: 06/11/2004] [Indexed: 05/14/2023]
Abstract
Pyrolyser-gas chromatography-mass spectrometry was used to analyze polycyclic aromatic hydrocarbons in contaminated soil without preliminary extraction. Experimental research methodology was used to obtain optimal performance of the system. After determination of the main factors (desorption time, Curie point temperature, carrier gas flow), modeling was done using a Box-Behnken matrix. Study of the response surface led to factor values that optimize the experimental response and achieve better chromatographic results.
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Affiliation(s)
- S Buco
- Laboratoire de Chimie Analytique de l'Environment, UMR 6171, IFR PMSE 112, Université Aix-Marseille III, Europôle de l'Arbois, Batiment Villemin, BP 80, 13545 Aix en Provence Cedex 4, France
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Abstract
The aim of this research is to demonstrate the effect of variations in certain parameters of the oily phase (OP) in water-in-oil (W/O) emulsions on rheological and texture properties of finished products. The formulated emulsions were selected according to an optimal experimental procedure. The applied variations were nature of the OP, its volume fraction, the hydrophilic-lipophilic balance (HLB) value, and the surfactant proportion. Results are presented for the followed tests carried out on the emulsions: texture analysis, rheology, and particle size analysis. The oils used in the study were sweet almond oil, liquid paraffin, maize oil, cyclomethicone, dimethicone, and wheat germ oil. The resulting data demonstrate a notable influence of the volume fraction oil on hardness, viscosity, adhesiveness, and cohesiveness of W/O emulsions. Emulsion hardness and viscosity increased as the OP percentage increased; this effect being even more pronounced for the vegetable oils. In contrast, emulsion adhesiveness and cohesiveness decreased as the volume fraction oil increased. The HLB value of the surfactant mixture of the emulsion also influenced hardness, adhesiveness, and elasticity, increasing or decreasing as HLB value did.
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Affiliation(s)
- V Lemaitre-Aghazarian
- Faculté de Pharmacie de Marseille, Laboratoire de Pharmacie Galénique et Industrielle, Marseille, France.
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Furlanetto S, Orlandini S, Mura P, Sergent M, Pinzauti S. How experimental design can improve the validation process. Studies in pharmaceutical analysis. Anal Bioanal Chem 2003; 377:937-44. [PMID: 13680061 DOI: 10.1007/s00216-003-2189-2] [Citation(s) in RCA: 24] [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: 04/11/2003] [Revised: 07/10/2003] [Accepted: 07/18/2003] [Indexed: 10/26/2022]
Abstract
A critical discussion about the possibility of improving the method validation process by means of experimental design is presented. The reported multivariate strategies concern the evaluation of the performance parameters robustness and intermediate precision, and the optimisation of bias and repeatability. In particular, accuracy and precision improvement constitutes a special subset of experimental design in which the bias and the relative standard deviation of the assay are optimised. D-optimal design was used in order to plan experiments for this aim. The analytical methods considered were capillary electrophoresis, HPLC, adsorptive stripping voltammetry and differential pulse polarography. All methods were applied to real pharmaceutical analysis problems.
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Affiliation(s)
- S Furlanetto
- Department of Pharmaceutical Sciences, University of Florence, Via G. Capponi 9, 50121, Florence, Italy.
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Campo JD, Nguyen-The C, Sergent M, Amiot M. Determination of the Most Bioactive Phenolic Compounds from Rosemary Against Listeria Monocytogenes: Influence of Concentration, pH, and NaCl. J Food Sci 2003. [DOI: 10.1111/j.1365-2621.2003.tb07019.x] [Citation(s) in RCA: 13] [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: 11/28/2022]
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Fischer O, Jones H, Bongi G, Sergent M, Chevrel R. Measurements of critical fields up to 500 kG in the ternary molybdenum sulphides. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/7/24/004] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Péan J, Venier-Julienne M, Filmon R, Sergent M, Phan-Tan-Luu R, Benoit J. Optimization of HSA and NGF encapsulation yields in PLGA microparticles. Int J Pharm 1998. [DOI: 10.1016/s0378-5173(98)00033-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Montner P, Sergent M, Case E, Douglas M, Griego E, Martinez F, Jaramillo B, Tarasenko P. TQI in the Albuquerque Veterans Affairs Medical Center's long-term oxygen therapy program. Jt Comm J Qual Improv 1998; 24:203-211. [PMID: 9589333 DOI: 10.1016/s1070-3241(16)30373-x] [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: 05/22/2023]
Abstract
BACKGROUND Long-term oxygen therapy (LTOT) is the only treatment demonstrated to prolong the life of patients with chronic obstructive pulmonary disease. In November 1994, a multidisciplinary total quality improvement (TQI) team composed of the involved hospital services was established to reorganize and improve the LTOT program at the Albuquerque Veterans Affairs Medical Center (AVAMC), Albuquerque. FROM THE OLD TO THE NEW PROCESS: The LTOT team used a process map to analyze the current process and gather information from patients and staff regarding their satisfaction with the program. It then began working on the identified problems and streamlining the LTOT referral process. A respiratory therapy position with the specific responsibility of serving as the home oxygen (O2) coordinator (HOC) was established and filled. The evaluation process was to be initiated by the AVAMC physicians, following which the HOC would perform a newly standardized evaluation that would establish the patient's need for O2 and result in a specific prescription. RESULTS Quality indicators were selected to monitor changes in the program. Data from chart reviews, the Veterans Affairs National Cost Containment Center, and patient surveys were used to evaluate the indicators. Timeliness of referral to the program before inpatient discharge improved, O2 prescriptions in the new program more frequently addressed activity, and the cost per patient was reduced by 37.1%. Patient satisfaction rates also improved. DISCUSSION A motivated team with representatives of the services involved was able to analyze and dramatically improve an important but complicated program.
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Affiliation(s)
- P Montner
- Pulmonary Section, Albuquerque Veterans Affairs Medical Center, NM, USA
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Cordier S, Perrin C, Sergent M. An Original Series in the Tantalum Cluster Oxohalide Chemistry with Isolated (Ta6Br15O3)5- Units: Crystal Structure of Cs2LaTa6Br15O3. J SOLID STATE CHEM 1995. [DOI: 10.1006/jssc.1995.1373] [Citation(s) in RCA: 16] [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: 11/22/2022]
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Kishore KN, Satyavathi S, Muralidhar M, Babu VH, Pena O, Sergent M, Beniere F. Superconducting and magnetic properties of Gd substituted 2:2:2:3 Bismuth cuprates (Bi1.7Pb0.3Sr2Ca2–xGdxCu3Oy). ACTA ACUST UNITED AC 1994. [DOI: 10.1002/pssa.2211430113] [Citation(s) in RCA: 20] [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: 11/10/2022]
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Pernot JM, Brun H, Pouyet B, Sergent M, Phan-Tan-Luu R. Influence of experimental parameters on the microencapsulation of a photopolymerizable phase. J Microencapsul 1993; 10:323-8. [PMID: 8377090 DOI: 10.3109/02652049309031522] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Conditions of microencapsulation by in situ polycondensation, using melamine-formaldehyde as wall material, are influenced by the chemical nature of the core to encapsulate. In our study concerning the encapsulation of a photopolymerizable phase containing an electrically charged compound, it was necessary to modify the experimental process to obtain capsules of good quality. We used the factorial design method of screening by utilization of an asymmetric matrix, according to the collapsing principle of Addleman. The advantage of this method is that it allows determination of the simultaneous influences of the 11 experimental parameters involved in this preparation. The calculation method can be applied to more than two levels for some of the factors. The continuously varying parameters were altered between two extreme levels, chosen to allow encapsulation. For discontinuous factors, such as the molecular weight of the modifying system or nature of the aminoplast, we used the commercially available compounds, respectively three and four kinds. The results of the obtained capsules were determined by comparing microphotographic pictures. With 16 experiments we found four more factors influencing quality of capsules. We also determined the most favourable levels for the other seven parameters. The results allowed us to find optimal conditions in the experimental field. We obtained capsules of a satisfactory quality for this purpose, using only minimum experimentation.
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Affiliation(s)
- J M Pernot
- Laboratoire de Photochimie Appliquée, Université Claude Bernard Lyon I, Villeurbanne, France
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Renaudin C, Magnin IE, Picard C, Trousset Y, Sergent M, Amiel M. Image quality study in 3D X-ray angiography: a first approach using the experimental design strategy. Comput Med Imaging Graph 1993; 17:309-22. [PMID: 8306303 DOI: 10.1016/0895-6111(93)90022-f] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The visual detection of fine structures and the accuracy of the quantitation of geometric and densitometric features, are closely related to the quality of the images available in two-dimensional (2D) and three-dimensional (3D) X-ray angiography. In this context, we propose to analyze all the parameters influencing this accuracy using an experimental design strategy. Preliminary tests of this procedure, applied to 2D and 3D angiographic data obtained from a dedicated phantom, yield encouraging results. We show that the detection of small arteries in a 3D angiogram is more sensitive to the number of projections than to the X-ray dose.
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Affiliation(s)
- C Renaudin
- URA CNRS 1216 Hôpital Cardiologique BP Lyon Montchat, France
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Svedlindh P, Niskanen K, Norling P, Nordblad P, Lundgren L, Rossel C, Sergent M, Chevrel R, Potel M. Magnetic relaxation in an isotropic extreme type-II superconductor. Phys Rev B Condens Matter 1991; 43:2735-2741. [PMID: 9997569 DOI: 10.1103/physrevb.43.2735] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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François M, Lengauer W, Yvon K, Sergent M, Potel M, Gougeon P, Yaich-Aerrache HB. Structural phase transition in GaMo4S8 by X-ray powder diffraction. Z KRIST-CRYST MATER 1991. [DOI: 10.1524/zkri.1991.196.14.111] [Citation(s) in RCA: 3] [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: 11/24/2022]
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François M, Lengauer W, Yvon K, Yaich-Aerrache HB, Gougeon P, Potel M, Sergent M. Structural phase transition in GaMo4S8by X-ray powder diffraction. ACTA ACUST UNITED AC 1991. [DOI: 10.1524/zkri.1991.196.1-4.111] [Citation(s) in RCA: 20] [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: 11/24/2022]
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Perot C, Sergent M, Richard P, Luu RPT, Millot N. The effects of pH, temperature and agitation speed on sludge anaerobic hydrolysis‐acidification. ACTA ACUST UNITED AC 1988. [DOI: 10.1080/09593338809384628] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Dum�nil G, Mattei G, Sergent M, Bertrand J, Laget M, Phan-Tan-Luu R. Application of a Doehlert experimental design to the optimization of microbial degradation of crude oil in sea water by continuous culture. Appl Microbiol Biotechnol 1988. [DOI: 10.1007/bf00251777] [Citation(s) in RCA: 23] [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: 11/28/2022]
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Perrin A, Li Z, Peña O, Padiou J, Sergent M. d.c. sputtering elaboration of thin films of the high-Tc superconductor YBa2Cu3O7-x: evidence for strong film-substrate interactions. ACTA ACUST UNITED AC 1988. [DOI: 10.1051/rphysap:01988002303025700] [Citation(s) in RCA: 14] [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: 11/14/2022]
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Chevrel R, Sergent M, Le Lay L, Padiou J, Pena O, Dubots P, Genevey P, Couach M, Vallier JC. Obtention par métallurgie des poudres à froid de filaments supraconducteurs de phases de Chevrel Pb (Sn)Mo6S8 et leurs résultats de densités de courant Jc mesurées par transport. ACTA ACUST UNITED AC 1988. [DOI: 10.1051/rphysap:0198800230110177700] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Gougeon P, Potel M, Padiou J, Sergent M, Boulanger C, Lecuire J. Synthèse, structure cristalline, et propriétés physiques du nouveau binaire métastable supraconducteur a clusters Mo9:OMo9Se11. J SOLID STATE CHEM 1987. [DOI: 10.1016/0022-4596(87)90264-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bauduin G, Mouanda J, Taha M, Sergent M, Mathieu D, Phan Tan Luu R. Mise au point d'un nouveau béton léger de polystyrène expansé—I: ètude des constituants principaux. Eur Polym J 1987. [DOI: 10.1016/0014-3057(87)90134-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bauduin G, Mouanda J, Taha M, Mathieu D, Phan Tan Luu R, Sergent M. Mise au point d'un nouveau béton léger de polystyrène expansé—II: Études des additifs. Eur Polym J 1987. [DOI: 10.1016/0014-3057(87)90135-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Geserich H, Scheiber G, Dürrler M, Potel M, Sergent M, Monceau P. Polarized reflectance spectra of the one-dimensional superconductor Tl2Mo6Se6 - a comparison with the anisotropic superconductor (SN)x. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0378-4363(86)90104-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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