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Habihirwe P, Marini H, Wurtz B, Vermeulin T, Lottin M, Gehanno JF, Boulet L, Vergnes H, Edet S, Guet L, Le Roy F, Merle V. Compliance with good practice guidelines for the prevention of vascular access infections: the multi-centre PHYDEL survey in French haemodialysis units. J Hosp Infect 2023; 142:1-8. [PMID: 37734680 DOI: 10.1016/j.jhin.2023.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 09/01/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023]
Abstract
BACKGROUND French guidelines for the prevention of vascular access infections in a haemodialysis setting were released in 2005. Compliance with these guidelines is currently unknown. The aim of this study was to assess compliance with the guidelines for vascular access infection prevention in French haemodialysis units, and to describe the difficulties reported. METHODS A cross-sectional survey was conducted between March and December 2019 in 200 haemodialysis units in France, selected at random. Data were collected via questionnaire, completed by telephone interview with an infection control practitioner. A practice was deemed compliant when >85% of units declared that they always complied with the guidelines. RESULTS In total, 103 units (51.5%) agreed to participate. Most practices complied with the guidelines; however, some practices did not reach the 85% compliance threshold for working in pairs when connecting central venous catheter (CVC) lines, performing hand hygiene before disconnecting lines, rinsing antiseptic soap before painting CVC exit site or arteriovenous fistula (AVF) puncture site, allowing antiseptic paint to dry, handling CVC branches with antiseptic impregnated gauze, performing hand hygiene after AVF compression with gloves, wearing protective eyewear when connecting/disconnecting CVC or when puncturing AVF, and wearing a gown when puncturing AVF. The most frequently reported difficulties were understaffing, difficulties with skin preparation because of exit site skin damage, and lack of buttonhole technical expertise. CONCLUSIONS Despite good overall compliance, this survey highlights some shortcomings in compliance with infection prevention guidelines, which could be associated with either higher risk of vascular access infection or increased blood-borne virus transmission.
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Affiliation(s)
- P Habihirwe
- Department of Infection Control, CHU Rouen, Rouen, France
| | - H Marini
- Department of Infection Control, CHU Rouen, Rouen, France; Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France
| | - B Wurtz
- Department of Infection Control, CHU Rouen, Rouen, France; Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France; REIN Registry, Agence de Biomédecine, Paris, France
| | - T Vermeulin
- Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France; Comprehensive Cancer Centre Henri Becquerel, UNICANCER, Rouen, France
| | - M Lottin
- Department of Infection Control, CHU Rouen, Rouen, France; Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France
| | - J F Gehanno
- Department of Occupational Health, CHU Rouen, Rouen, France
| | - L Boulet
- Department of Infection Control, CHU Rouen, Rouen, France; Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France
| | | | - S Edet
- REIN Registry, Agence de Biomédecine, Paris, France; Department of Nephrology and Haemodialysis, CHU Rouen, Rouen, France; ANIDER Rouen Normandie, Rouen, France
| | - L Guet
- CPIAS Normandie, Rouen, France
| | - F Le Roy
- Department of Nephrology and Haemodialysis, CHU Rouen, Rouen, France
| | - V Merle
- Department of Infection Control, CHU Rouen, Rouen, France; Research Group Dynamiques et Evènements des Soins et des Parcours, CHU Rouen, Rouen, France; REIN Registry, Agence de Biomédecine, Paris, France.
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Decosterd L, Topka KC, Diallo B, Samelor D, Vergnes H, Senocq F, Caussat B, Vahlas C, Menu MJ. An innovative GC-MS, NMR and ESR combined, gas-phase investigation during chemical vapor deposition of silicon oxynitrides films from tris(dimethylsilyl)amine. Phys Chem Chem Phys 2021; 23:10560-10572. [PMID: 33903868 DOI: 10.1039/d1cp01129d] [Citation(s) in RCA: 2] [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: 01/31/2023]
Abstract
Tris(dimethylsilyl)amine (TDMSA) is used in the presence of O2 and NH3 for the atmospheric pressure chemical vapor deposition (CVD) of conformal, corrosion barrier silicon oxynitride (SiOxNy) films at moderate temperature. Plausible decomposition pathways taking place during the process, as well as resulting gas-phase by-products, are investigated by an innovative methodology, coupling solid-state films characteristics with gas phase analysis. Liquid NMR, gas chromatography coupled with mass spectrometry (GC-MS) and electron spin resonance (ESR) allow probing stable compounds and radical intermediate species in the gas phase. At least fifteen by-products are identified, including silanols, siloxanes, disilazanes, silanamines, and mixed siloxane-silanamine molecules, in addition to more usual compounds such as water. The radical dimethylsilane, Me2HSi˙, is noted across all experiments, hinting at the decomposition of the TDMSA precursor. Deposition of SiOxNy films occurs even in the absence of NH3, demonstrating the judicious choice of the silanamine TDMSA as a dual source of nitrogen and silicon. Additionally, the presence of Si-H bonds in the precursor structure allows formation of SiOxNy films at temperatures lower than those required by other conventional silazane/silanamine precursors. Addition of NH3 in the inlet gas supply results in lower carbon impurities in the films. The identified by-products and formulated decomposition and gas-phase reactions provide stimulating insight and understanding of the deposition mechanism of SiOxNy films by CVD, offering possibilities for the investigation of representative chemical models and process simulation.
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Affiliation(s)
- Laura Decosterd
- CIRIMAT, Université de Toulouse, CNRS, Université Toulouse 3 - Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
| | - Konstantina Christina Topka
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France and LGC, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - Babacar Diallo
- CNRS, Conditions Extrêmes et Matériaux, Haute Température et Irradiation (CEMHTI) UPR 3079, Université d'Orléans, Site Cyclotron, CS 30058, 3A Rue de la Férolerie, 45071 Orléans Cedex 2, France
| | - Diane Samelor
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - Hugues Vergnes
- LGC, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - François Senocq
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - Brigitte Caussat
- LGC, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - Constantin Vahlas
- CIRIMAT, Université de Toulouse, CNRS, INP-ENSIACET, 4, Allée Emile Monso, BP-44362, 31030 Toulouse Cedex 4, France
| | - Marie-Joëlle Menu
- CIRIMAT, Université de Toulouse, CNRS, Université Toulouse 3 - Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
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Duan Z, Fiquet O, Ablitzer C, Cassayre L, Vergnes H, Floquet P, Joulia X. Application of pyrolysis to remove hydrogen from an organic nuclear waste. J Hazard Mater 2021; 401:123367. [PMID: 32653790 DOI: 10.1016/j.jhazmat.2020.123367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/28/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
The work deals with the removal by slow pyrolysis of epoxy resin from samples of spent nuclear fuel embedded in this polymer. Beyond the nuclear field, epoxy resin removal by pyrolysis is a typical issue for the recovery of metals in electronic waste. The main objective is to find the optimal conditions to remove hydrogen in the residual solid waste, in order to avoid hydrogen production by radiolysis during storage and so to prevent any risk of overpressure and explosion. The condensable pyrolysis products (tar-water mixture) and the char were characterised and quantified by elemental analyses, while the permanent gases were quantified by gas chromatography. A data reconciliation method was applied to adjust the values of raw measurements in order to complete the mass balances for both C, H, O and N elements and pyrolysis products. After studying the impact of temperature on the pyrolysis balance, experiments on a pilot furnace were conducted at 450 °C, in the frame of a parametric study of the heating rate, argon gas flow rate, resin mass and plateau time. At fixed temperature, we show that the plateau time is the only significant parameter for minimizing the residual hydrogen content in the char.
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Affiliation(s)
- Zhiya Duan
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INP, UPS, Toulouse, France; CEA, DEC, Cadarache, 13108, Saint-Paul-lez-Durance, France
| | - Olivier Fiquet
- CEA, DEC, Cadarache, 13108, Saint-Paul-lez-Durance, France
| | | | - Laurent Cassayre
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INP, UPS, Toulouse, France
| | - Hugues Vergnes
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INP, UPS, Toulouse, France
| | - Pascal Floquet
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INP, UPS, Toulouse, France
| | - Xavier Joulia
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INP, UPS, Toulouse, France.
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Topka KC, Chliavoras GA, Senocq F, Vergnes H, Samelor D, Sadowski D, Vahlas C, Caussat B. Large temperature range model for the atmospheric pressure chemical vapor deposition of silicon dioxide films on thermosensitive substrates. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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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Ponton S, Vergnes H, Samelor D, Sadowski D, Vahlas C, Caussat B. Development of a kinetic model for the moderate temperature chemical vapor deposition of SiO2
films from tetraethyl orthosilicate and oxygen. AIChE J 2018. [DOI: 10.1002/aic.16222] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Simon Ponton
- LGC; Université de Toulouse, CNRS; Toulouse France
- CIRIMAT; Université de Toulouse, CNRS; Toulouse France
| | | | - Diane Samelor
- CIRIMAT; Université de Toulouse, CNRS; Toulouse France
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Gakis G, Vergnes H, Scheid E, Vahlas C, Caussat B, Boudouvis A. Computational Fluid Dynamics simulation of the ALD of alumina from TMA and H2O in a commercial reactor. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.02.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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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Baggetto L, Charvillat C, Esvan J, Thébault Y, Samélor D, Vergnes H, Caussat B, Gleizes A, Vahlas C. A Process-Structure Investigation of Aluminum Oxide and Oxycarbide Thin Films prepared by Direct Liquid Injection CVD of Dimethylaluminum Isopropoxide (DMAI). ACTA ACUST UNITED AC 2015. [DOI: 10.1002/cvde.201507190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Loïc Baggetto
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Cédric Charvillat
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Jérôme Esvan
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Yannick Thébault
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Diane Samélor
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Hugues Vergnes
- Laboratoire de Génie Chimique (LGC); Université de Toulouse; 4 allée Emile Monso, CS-84234 31432 Toulouse Cedex 4 France
| | - Brigitte Caussat
- Laboratoire de Génie Chimique (LGC); Université de Toulouse; 4 allée Emile Monso, CS-84234 31432 Toulouse Cedex 4 France
| | - Alain Gleizes
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
| | - Constantin Vahlas
- Centre Inter-universitaire de Recherche et d'Ingéniérie des Matériaux (CIRIMAT); UMR5085 CNRS; 4 allée Emile Monso, BP-44362 31030 Toulouse Cedex 4 France
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8
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Baggetto L, Esvan J, Charvillat C, Samélor D, Vergnes H, Caussat B, Gleizes A, Vahlas C. Alumina thin films prepared by direct liquid injection chemical vapor deposition of dimethylaluminum isopropoxide: a process-structure investigation. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pssc.201510009] [Citation(s) in RCA: 8] [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: 11/09/2022]
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9
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Etchepare PL, Baggetto L, Vergnes H, Samélor D, Sadowski D, Caussat B, Vahlas C. Process-structure-properties relationship in direct liquid injection chemical vapor deposition of amorphous alumina from aluminum tri-isopropoxide. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pssc.201510037] [Citation(s) in RCA: 7] [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: 11/07/2022]
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10
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Chairat A, Joulia X, Floquet P, Vergnes H, Ablitzer C, Fiquet O, Brothier M. Thermal degradation kinetics of a commercial epoxy resin-Comparative analysis of parameter estimation methods. J Appl Polym Sci 2015. [DOI: 10.1002/app.42201] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Aziza Chairat
- Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique; 4, Allée Emile Monso F-31030 Toulouse France
- CNRS; Laboratoire de Génie Chimique, UMR 5503; F-31030 Toulouse France
- CEA; Cadarache, DEN/CAD/DEC/SPUA/LCU - Bât 315; 13108 St Paul Lez Durance France
| | - Xavier Joulia
- Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique; 4, Allée Emile Monso F-31030 Toulouse France
- CNRS; Laboratoire de Génie Chimique, UMR 5503; F-31030 Toulouse France
| | - Pascal Floquet
- Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique; 4, Allée Emile Monso F-31030 Toulouse France
- CNRS; Laboratoire de Génie Chimique, UMR 5503; F-31030 Toulouse France
| | - Hugues Vergnes
- Université de Toulouse, INPT, UPS, Laboratoire de Génie Chimique; 4, Allée Emile Monso F-31030 Toulouse France
- CNRS; Laboratoire de Génie Chimique, UMR 5503; F-31030 Toulouse France
| | - Carine Ablitzer
- CEA; Cadarache, DEN/CAD/DEC/SPUA/LCU - Bât 315; 13108 St Paul Lez Durance France
| | - Olivier Fiquet
- CEA; Cadarache, DEN/CAD/DEC/SPUA/LCU - Bât 315; 13108 St Paul Lez Durance France
| | - Meryl Brothier
- CEA; Cadarache, DEN/CAD/DEC/SPUA/LCU - Bât 315; 13108 St Paul Lez Durance France
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Chaisubanan N, Pruksathorn K, Vergnes H, Hunsom M. Effect of the TiO2 phase and loading on oxygen reduction reaction activity of PtCo/C catalysts in proton exchange membrane fuel cells. KOREAN J CHEM ENG 2015. [DOI: 10.1007/s11814-014-0340-8] [Citation(s) in RCA: 10] [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: 11/24/2022]
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Trinsoutrot P, Rabot C, Vergnes H, Delamoreanu A, Zenasni A, Caussat B. The Role of the Gas Phase in Graphene Formation by CVD on Copper. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/cvde.201307075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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)
- Pierre Trinsoutrot
- Université de Toulouse, Laboratoire de Génie Chimique; ENSIACET/INP Toulouse; UMR CNRS 5503 4 allée Émile Monso BP 44362, 31432 Toulouse Cedex 4 (France)
| | - Caroline Rabot
- CEA, LETI, MINATEC Campus; 17 rue des Martyrs, 38054 GRENOBLE Cedex 9 (France)
| | - Hugues Vergnes
- Université de Toulouse, Laboratoire de Génie Chimique; ENSIACET/INP Toulouse; UMR CNRS 5503 4 allée Émile Monso BP 44362, 31432 Toulouse Cedex 4 (France)
| | | | - Aziz Zenasni
- CEA, LETI, MINATEC Campus; 17 rue des Martyrs, 38054 GRENOBLE Cedex 9 (France)
| | - Brigitte Caussat
- Université de Toulouse, Laboratoire de Génie Chimique; ENSIACET/INP Toulouse; UMR CNRS 5503 4 allée Émile Monso BP 44362, 31432 Toulouse Cedex 4 (France)
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Samélor D, Lazar AM, Aufray M, Tendero C, Lacroix L, Béguin JD, Caussat B, Vergnes H, Alexis J, Poquillon D, Pébère N, Gleizes A, Vahlas C. Amorphous alumina coatings: processing, structure and remarkable barrier properties. J Nanosci Nanotechnol 2011; 11:8387-8391. [PMID: 22097590 DOI: 10.1166/jnn.2011.5068] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Amorphous aluminium oxide coatings were processed by metalorganic chemical vapour deposition (MOCVD); their structural characteristics were determined as a function of the processing conditions, the process was modelled considering appropriate chemical kinetic schemes, and the properties of the obtained material were investigated and were correlated with the nanostructure of the coatings. With increasing processing temperature in the range 350 degrees C-700 degrees C, subatmospheric MOCVD of alumina from aluminium tri-isopropoxide (ATI) sequentially yields partially hydroxylated amorphous aluminium oxides, amorphous Al2O3 (415 degrees C-650 degrees C) and nanostructured gamma-Al2O3 films. A numerical model for the process allowed reproducing the non uniformity of deposition rate along the substrate zone due to the depletion of ATI. The hardness of the coatings prepared at 350 degrees C, 480 degrees C and 700 degrees C is 6 GPa, 11 GPa and 1 GPa, respectively. Scratch tests on films grown on TA6V titanium alloy reveal adhesive and cohesive failures for the amorphous and nanocrystalline ones, respectively. Alumina coating processed at 480 degrees C on TA6V yielded zero weight gain after oxidation at 600 degrees C in lab air. The surface of such low temperature processed amorphous films is hydrophobic (water contact angle 106 degrees), while the high temperature processed nanocrystalline films are hydrophilic (48 degrees at a deposition temperature of 700 degrees C). It is concluded that amorphous Al2O3 coatings can be used as oxidation and corrosion barriers at ambient or moderate temperature. Nanostructured with Pt or Ag nanoparticles, they can also provide anti-fouling or catalytic surfaces.
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Affiliation(s)
- Diane Samélor
- University of Toulouse, CIRIMAT/INP T, 4 allée Emile Monso BP 44362, 31030 Toulouse cedex 4, France
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Klamklang S, Vergnes H, Senocq F, Pruksathorn K, Duverneuil P, Damronglerd S. Deposition of tin oxide, iridium and iridium oxide films by metal-organic chemical vapor deposition for electrochemical wastewater treatment. J APPL ELECTROCHEM 2009. [DOI: 10.1007/s10800-009-9968-1] [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: 10/20/2022]
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Trompette JL, Vergnes H. On the crucial influence of some supporting electrolytes during electrocoagulation in the presence of aluminum electrodes. J Hazard Mater 2009; 163:1282-1288. [PMID: 18790563 DOI: 10.1016/j.jhazmat.2008.07.148] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2008] [Revised: 06/27/2008] [Accepted: 07/22/2008] [Indexed: 05/26/2023]
Abstract
The influence of some supporting electrolytes on aluminum electrode oxidation and pH variation during electrocoagulation of an unskimmed milk sample and a cutting oil emulsion has been investigated. Among the electrolytes studied, sulfate anions were found to be quite harmful both for electrical consumption and electrocoagulation efficiency. At the opposite, chloride and ammonium ions were particularly benefic respectively for aluminum corrosion and pH regulation, whereas sodium cations were observed to have a neutral role. The results indicate that electrocoagulation can be realized at low anodic potential even in the presence of sulfate ions when the [Cl(-)]/[SO(4)(2-)] ratio is around or greater than 1/10. The detrimental effect of sulfates on electrocoagulation efficiency can be thwarted by the use of the ammonium salt thanks to its related buffer effect.
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Affiliation(s)
- J L Trompette
- Laboratoire de Génie Chimique UMR 5503, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France.
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Vergnes H, Puget A, Gouarderes C. Comparative study of red-cell enzyme polymorphism in the pika and the rabbit. Anim Blood Groups Biochem Genet 2009; 5:181-8. [PMID: 4375417 DOI: 10.1111/j.1365-2052.1974.tb01330.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Trompette J, Vergnes H, Coufort C. Enhanced electrocoagulation efficiency of lyophobic colloids in the presence of ammonium electrolytes. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2007.07.024] [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: 10/23/2022]
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Abstract
Comparative electrodeposition of iron onto the surface of silicon was investigated at large overpotential in the presence of some base electrolytes. The nanostructure of the iron electrodeposits was analyzed with SEM and FE-SEM measurements. The results highlight the influences of ion specificity on the rate of hydrogen evolution and of selective ion adsorption on the morphology of the iron electrodeposits.
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Affiliation(s)
- J L Trompette
- Laboratoire de Génie Chimique UMR 5503, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex, France.
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Hunsom M, Pruksathorn K, Damronglerd S, Vergnes H, Duverneuil P. Electrochemical treatment of heavy metals (Cu2+, Cr6+, Ni2+) from industrial effluent and modeling of copper reduction. Water Res 2005; 39:610-616. [PMID: 15707634 DOI: 10.1016/j.watres.2004.10.011] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2004] [Revised: 10/04/2004] [Accepted: 10/18/2004] [Indexed: 05/24/2023]
Abstract
An electrochemical technique was tested in a laboratory scale to treat heavy metals (Cu2+, Cr6+ and Ni2+) from plating industrial effluent. The experiments were performed in a membrane reactor having a capacity of 1 l. Stainless-steel sheets with surface area of 0.011 m2 and titanium coated with ruthenium oxide were used as cathode and anode, respectively. The electrolyte was circulated at a constant flow rate (0.42 l/min) and the pH was kept constant at 1. Applied current densities were 10 and 90 A/m2. According to the experiment, it was found that a membrane reactor with plane electrode was capable for treating plating wastewater with low energy consumption (42.30 kWh/kg metal) and low operating cost (5.43 US dollars/m3). More than 99% of metal reduction was achieved and the final concentrations of copper, chromium and nickel in treated water were 0.10-0.13, 0.19-0.20 and 0.05-0.13 ppm, respectively. The brightener had no effect on copper reduction whereas hexavalent chromium had strong effect. The kinetic of copper reduction in the presence of hexavalent chromium was modeled as a two-step process with respect to copper concentration.
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Affiliation(s)
- M Hunsom
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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Teeratananon M, Pruksathorn K, Damronglerd S, Dupuy F, Vergnes H, Fenouillet B, Duverneuil P. ScienceAsia 2004; 30:375. [DOI: 10.2306/scienceasia1513-1874.2004.30.375] [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: 11/02/2022]
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Vergnes H, Duverneuil P, Couderc JP. Une nouvelle technologie d'appareils de dépôt chimique en phase vapeur. Partie 1 : Présentation et analyse des résultats expérimentaux. CAN J CHEM ENG 2000. [DOI: 10.1002/cjce.5450780424] [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: 11/07/2022]
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23
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Grozdea J, Vergnes H, Cambus JP, Bourrouillou G, Calvas P. Neutrophil alkaline phosphatase activity in Turner syndrome. Acta Haematol 2000; 102:201-2. [PMID: 10725764 DOI: 10.1159/000041016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- J Grozdea
- Laboratoire d'Enzymologie, CNRS, CHU Rangueil, France
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Vergnes H, Grozdea J, Denier C, Bourrouillou G, Calvas P, De La Farge F, Valdiguié P, Calot M. Lower alkaline phosphatase activity and occurrence of an abnormal hybrid intestinal/tissue non-specific isoform in Down's syndrome amniotic fluids. Early Hum Dev 2000; 58:17-24. [PMID: 10785333 DOI: 10.1016/s0378-3782(00)00051-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Quantitative and qualitative analysis of alkaline phosphatases (AP) was performed on amniotic fluid in 59 normal pregnancies and 14 Down's syndrome (DS) pregnancies at 16, 18 and 19 weeks of gestation. In DS cases, intestinal and placental isoenzyme levels were significantly reduced (P<0.001) and the AP electrophoretic pattern was seen to be modified on polyacrylamide gel electrophoresis. A unique component was detected. After extraction and purification of the abnormal isoenzyme, peptide fragments obtained after cyanogen bromide cleavage indicated a hybrid heterodimeric AP composed of intestinal and tissue non-specific subunits, as evaluated by SDS polyacrylamide gel electrophoresis.
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Affiliation(s)
- H Vergnes
- Laboratoire d'Enzymologie, Service Universitaire d'Hématologie (INSERM, CNRS), CHU Rangueil, 31403, Toulouse, France
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Vergnes H, Grozdea J, Denier C, Bourrouillou G, Calvas P. Expression of a liver/bone-intestinal hybrid of alkaline phosphatase in neutrophils of Down's syndrome patients. Clin Chim Acta 1999; 279:167-73. [PMID: 10064128 DOI: 10.1016/s0009-8981(98)00165-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- H Vergnes
- Faculty of Medicine, Department of Haematology, Toulouse, France
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Laharrague P, Denier CJ, Grozdea J, Perié JJ, Corberand JX, Fillola G, Vergnes H. Atypical neutrophil alkaline phosphatase associated with impaired neutrophil functions. Clin Chim Acta 1998; 277:77-89. [PMID: 9776047 DOI: 10.1016/s0009-8981(98)00119-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
We report the case of a healthy young man presenting with atypical neutrophil alkaline phosphatase (NAP) and reduced neutrophil chemotactic activity, but with no susceptibility to infection. NAP activity was low, kinetic parameters were modified and immunoreactive properties and subcellular distribution were abnormal. Neutrophil morphology was normal. A similar pattern was observed in the patient's healthy brother. The profile of the observed anomalies offers some similarity to that previously described in patients with chronic myelogenous leukaemia. However, in the present case, the NAP deficiency with impaired neutrophil function was present in two brothers with no haematological symptoms and is probably related to a non-acquired neutrophil abnormality. This observation of a primary NAP variant reinforces the hypothesis of a direct link between NAP activity and functional properties of neutrophils.
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Affiliation(s)
- P Laharrague
- Laboratoire d'Hématologie, Hôpital Rangueil, Toulouse, France
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Vergnes H, Grozdea J, Brisson-Lougarre A, Bourrouillou G. Evaluation of two markers of cell maturation and proliferation in cultured amniotic cells of trisomic 18 fetuses at the 15th week of gestation. Early Hum Dev 1997; 49:1-5. [PMID: 9179533 DOI: 10.1016/s0378-3782(97)01868-9] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Intensive studies have been conducted so far on biochemical markers available for screening of chromosome defects in obstetrical monitoring. In this paper we report further data on two protein phosphatases: alkaline phosphatase (a marker of cell maturation) and phosphotyrosine phosphatase (a marker of cell proliferation) assayed in cultured amniotic cells from fetuses with trisomy 18 at 15 weeks of gestation. Comparison with normal fetal cells showed a different behaviour for each enzyme: alkaline phosphatase was very significantly lowered while phosphotyrosine phosphatase remained a normal levels. These results provide a further enlargement of the field of biochemical markers used in the screening tests of trisomy 18.
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Affiliation(s)
- H Vergnes
- Service Universitaire d'Hématologie, Laboratoire d'Enzymologie du Granulocyte (INSERM, CNRS), Toulouse, France
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Grozdea J, Vergnes H, Brisson-Lougarre A, Pellegry C, Bourrouillou G, Colombies P. Fetal alkaline phosphatase/maternal IgG immune complexes in trisomy 21 pregnancies. Prenat Diagn 1995; 15:1084-5. [PMID: 8606891 DOI: 10.1002/pd.1970151118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Grozdea J, Alie-Daram S, Vergnes H, Brisson-Lougarre A, Calot M, Martin J, Fournie A. About diminished transport of maternal IgG (RhD alloimmunization) to the fetus. Vox Sang 1995; 68:134-5. [PMID: 7605505 DOI: 10.1111/j.1423-0410.1995.tb02568.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Grozdea J, Alie-Daram S, Vergnes H, Brisson-Lougarre A, Calot M, Martin J, Fournie A. About Diminished Transport of
Maternal IgG (RhD
Alloimmunization) to the Fetus. Vox Sang 1995. [DOI: 10.1159/000462909] [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: 11/19/2022]
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Grozdea J, Vergnes H, Brisson-Lougarre A, Bourrouillou G, Colombies P, Kihn Y, Sevely J. Changes in immunological properties of neutrophil alkaline phosphatase in trisomy 21 pregnancies. Acta Haematol 1994; 92:113-8. [PMID: 7871948 DOI: 10.1159/000204198] [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: 01/27/2023]
Abstract
Immunoreactivity, cytochemical, immunocytochemical characteristics and subcellular distribution of neutrophil alkaline phosphatase (NAP) were investigated in blood and/or smear samples from 18 women aged 23-46 years (mean 32.5 years) with trisomy 21 fetuses (17-21 weeks) and 28 women aged 20-42 years (mean 31 years) with normal fetuses (17-22 weeks). Immunochemical NAP investigations were carried out in 8 pathological and 8 normal pregnancies; cytochemical and immunocytochemical procedures were carried out in 18 pregnant women with trisomy 21 fetuses and 28 controls. NAP from women with trisomy 21 fetuses is characterized by: (1) a significant decrease in reactivity with anti-liver-type alkaline phosphatase (AP) and anti-NAP antisera; (2) low or very slight reactivity with antiplacental or anti-intestinal antibodies; (3) marked dispersion of NAP lead citrate reaction products or anti-NAP antibody colloidal gold-labelling in neutrophil cytoplasms, as detected by electron microscopy. This subcellular AP distribution (extramembranous) is different from that of normal NAP sites associated with plasma membrane, nuclear membrane and secretory vesicles. The NAP immunochemical and cytochemical characteristics suggest that neutrophils of a woman with a trisomy 21 fetus contain two AP isoenzymes: the liver/bone type and an atypical AP.
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Affiliation(s)
- J Grozdea
- Laboratoire d'Enzymologie, INSERM-CNRS, CHU de Rangueil, France
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Brisson-Lougarre A, Vergnes H, Grozdea J. Atypical Electrophoretic and Isoelectrophoretic Patterns of Neutrophil Alkaline Phosphatase in a Case of Subacute Myelomonocytic Leukemia. Clin Chem 1992. [DOI: 10.1093/clinchem/38.7.1384a] [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: 11/13/2022]
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Brisson-Lougarre A, Vergnes H, Grozdea J. Atypical electrophoretic and isoelectrophoretic patterns of neutrophil alkaline phosphatase in a case of subacute myelomonocytic leukemia. Clin Chem 1992; 38:1384-6. [PMID: 1623614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Abstract
Assays of neutrophil phosphotyrosine phosphatase activity and determination of haematological parameters were performed on 12 trisomic 21 probands without any clinical or biological symptom of other evolutive disease. Haematological studies showed the two main classical abnormalities: the existence of a macrocytosis and an enhanced lymphocyte count. Of interest are the very reduced rates of phosphotyrosine phosphatase activity found in granulocytes from these patients. This defect in protein phosphatase can be considered as an additional enzymatic change extending the list of modified factors recognized at molecular and cellular levels in subjects whose risk of leukaemia is significantly increased.
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Affiliation(s)
- H Vergnes
- Laboratoire d'Enzymologie, INSERM, CNRS, CHU de Rangueil, Toulouse, France
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Vergnes H, Grozdea J, Brisson-Lougarre A, Bourrouillou G, Colombies P. Alkaline phosphatase and phosphotyrosine phosphatase activities of cultured amniotic cells with trisomy 18. Enzyme 1992; 46:284-6. [PMID: 1308852 DOI: 10.1159/000468805] [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: 12/26/2022]
Abstract
In cultured amniotic cells from fetuses with Edward's syndrome (trisomy 18), the activities of two protein phosphatases, alkaline phosphatase and phosphotyrosine phosphatase, were measured. Comparison with normal fetal cells showed a different behavior for each enzyme. Alkaline phosphatase was significantly lowered while phosphotyrosine phosphatase remained at normal levels. The interest of these enzyme assays in the screening procedure of this severe chromosome defect is discussed.
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Affiliation(s)
- H Vergnes
- Service Universitaire d'Hématologie (INSERM, CNRS), Faculté de Médecine de Toulouse Rangueil, France
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Brisson-Lougarre A, Vergnes H, Grozdea J, Bourrouillou G, Colombies P. Isoelectric focusing of neutrophil alkaline phosphatase in trisomy 21 pregnancies. Clin Chim Acta 1991; 204:305-7. [PMID: 1840247 DOI: 10.1016/0009-8981(91)90241-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Brisson-Lougarre A, Vergnes H, Grozdea J, Bourrouillou G, Colombies P. Isoelectric focusing of neutrophil alkaline phosphatase in trisomy 21 pregnancies. Clin Chim Acta 1991; 203:403-4. [PMID: 1838036 DOI: 10.1016/0009-8981(91)90315-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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38
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Grozdea J, Vergnes H, Brisson-Lougarre A, Bierme R, Bourrouillou G, Duchayne E, Martin J, Colombies P. Difference in activity properties and subcellular distribution of neutrophil alkaline phosphatase between normal individuals and patients with trisomy 21. Br J Haematol 1991; 77:282-6. [PMID: 1826452 DOI: 10.1111/j.1365-2141.1991.tb08571.x] [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: 12/28/2022]
Abstract
Biochemical, cytochemical characteristics and electron microscopy subcellular distribution of neutrophil alkaline phosphatase (NAP) were analysed in blood and/or smear samples from 39 trisomy 21 patients (Down's syndrome) aged 11.5-18 years (mean 15.5 years) and 55 normal subjects aged 12-20.5 years (mean 17 years). All patients were karyotyped. NAP cytochemical procedures were carried out on all subjects; biochemical NAP determinations were made in 10 patients and 20 controls; ultrastructural electron microscopy of AP was performed in three patients and four normal subjects. Neutrophil alkaline phosphatase from patients with trisomy 21 displayed the following changes: (1) a significant increase of enzyme activity, (2) a high thermal lability of enzyme. Electron microscope morphology exhibited large deposits of NAP reaction product associated with the plasma membrane and intracellular main organelles, like phosphasomes. The NAP biochemical and cytochemical characteristics suggest that trisomy 21 neutrophils contain a non-specific AP isoenzyme, closely related to the early placental form.
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Affiliation(s)
- J Grozdea
- Service Universitaire d'Hématologie, INSERM, CNRS, CHU de Rangueil, Toulouse, France
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Brissson-Lougarre A, Vergnes H, Grozdea J. About the presence of a circulating anti-alkaline phosphatase antibody in a trisomy 21 patient's serum. Enzyme 1991; 45:125-7. [PMID: 1840036 DOI: 10.1159/000468878] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An electrophoretically slow-moving alkaline phosphatase was found in the serum of a 17-year-old patient with Down's syndrome. Immunological and biochemical studies suggested that this abnormal enzyme pattern consisted of a complex of liver/bone isoenzyme with kappa-type immunoglobulins A and G.
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Affiliation(s)
- A Brissson-Lougarre
- Laboratoire d'Immunopathologie rénale, INSERM CJF 88 01, Faculté de Médecine, Toulouse-Rangueil, France
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Grozdea J, Brisson-Lougarre A, Vergnes H, Alie-Daram S, Martin J, Bierme R. About leukocyte alkaline phosphatase in AIDS. Acta Haematol 1990; 83:214. [PMID: 2115720 DOI: 10.1159/000205218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Brisson-Lougarre A, Vergnes H, Grozdea J, Alie-Daram S, Fontanilles AM, Bierme R. New antibody in severe rhesus incompatible pregnancies: IgG-kappa antiplacental alkaline phosphatase. Am J Reprod Immunol 1989; 19:151-4. [PMID: 2504185 DOI: 10.1111/j.1600-0897.1989.tb00566.x] [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: 01/01/2023] Open
Abstract
As already found in other various diseases, a macromolecular alkaline phosphatase complex (HMW-AP) was also found in sera of two severe Rhesus-incompatible pregnancies complicated by ascites and fetal hydrops at delivery. This atypical complex was detected and isolated by agarose gel electrophoresis. Immunoelectrophoresis and heat inactivation of this HMW-AP complex revealed that it consisted of IgG of the kappa type and placental AP isoenzyme. The transitory presence of this immuncomplex is discussed. However, in all women with Rh-immunized complicated pregnancies, significant variations of neutrophil and serum AP activities were observed. A fall in AP activity and the presence of an antiplacental AP antibody in serum of women with complicated Rh immunization should be of value in assessing the prognosis of the disease.
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Abstract
An isoelectric focusing technique for human neutrophil alkaline phosphatase isoenzymes is described. After sonication with Zwittergent 3-12, butanol extraction and ultracentrifugation, dialysis of cytosols precedes focusing. Focusing patterns show a heterogeneity with two enzymatic activity areas: a main component at pI 6.7-6.8 with a minor component at pI 4.8-5.0 which is difficult to visualize due to its sensitivity to experimental conditions. The addition of 3 mmol/l ZnCl2 to the agarose gel improved the staining of focused bands and in particular the anodic component.
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Affiliation(s)
- A Brisson-Lougarre
- Service Univesitaire d'Hématologie, Faculté de Médecine de Toulouse Rangueil, France
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Grozdea J, Brisson-Lougarre A, Vergnes H, Bierme R, Alie-Daram S, Martin J, Fournie A. IgG/placental alkaline phosphatase complexes in Rh-incompatible pregnancy with fetal hydrops. Vox Sang 1988; 55:42-3. [PMID: 3138817 DOI: 10.1111/j.1423-0410.1988.tb04687.x] [Citation(s) in RCA: 5] [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: 01/04/2023]
Abstract
In 11 cases with anti-Rh-complicated pregnancies, i.e. ascites at 21/25 weeks and fetal hydrops at delivery, we detected the presence of IgG/placental alkaline phosphatase complexes in the maternal serum.
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Affiliation(s)
- J Grozdea
- INSERM-CNRS Service Universitaire d'Hématologie, Toulouse, France
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Brisson-Lougarre A, Vergnes H, Grozdea J, Biermé R. Thin-layer agarose isoelectric focusing of alkaline phosphatase isoenzymes from human neutrophils. Electrophoresis 1988; 9:221-4. [PMID: 2466655 DOI: 10.1002/elps.1150090505] [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: 01/01/2023]
Abstract
An improved method for thin-layer agarose isoelectric focusing of alkaline phosphatases (AP) from human neutrophils is described. The solubilization of AP isoenzymes was studied with four detergents. The best results were obtained after sonication with Zwittergent 3-12 (1% final concentration), followed by butanol extraction and ultracentrifugation 105,000 x g for 1 h. The cytosol can be stored at 0 degrees C or -80 degrees C, but not at -20 degrees C. Dialysis of the cytosol against a Tris buffer, pH 7.5, was imperative prior to focusing for removal of the detergent. Enzyme visualization is enhanced by incorporation of ZnCl2 (3 mM) into the agarose gel. The focusing patterns consist of two sets of isoenzymes: two main zones with pI 6.4 and 6.8 and minor components with pI 4.2, 4.8 and 5.2.
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Affiliation(s)
- A Brisson-Lougarre
- Service Universitaire d'Hématologie, Faculté de Médecine de Toulouse, CNRS-INSERM, Rangueil, France
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45
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Grozdea J, Vergnes H, Brisson-Lougarre A, Bourrouillou G, Martin J, Blum C, Colombies P. Heat resistance, immunological and quantitative changes of neutrophil alkaline phosphatase in trisomy 21 pregnancies. Hum Genet 1988; 78:240-3. [PMID: 2964397 DOI: 10.1007/bf00291669] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neutrophil alkaline phosphatase (NAP) was analysed in 25 pregnant women with trisomy 21 foetuses whose chromosomal aberration was recognized by cytogenetic study after amniocentesis. Enzyme investigation was performed at 20-22 weeks of gestation using cytochemical and biochemical techniques. Twenty-nine women at the same stage of normal pregnancies were selected as controls. In parallel, each mother was karyotyped. Ten subjects from each series underwent biochemical and immunological investigation: measurement of enzyme levels, thermostability study and immunological tests with alkaline phosphatase isoenzyme antibodies. NAP from pregnant women with trisomy 21 foetuses was characterized by: (1) a lower rate of enzyme activity, (2) a large amount of heat-stable enzyme (T = 56 degrees C for biochemical assays, T = 85 degrees C for cytochemical tests), and (3) a marked loss of liver antigenicity. These findings suggest the presence in trisomy 21 pregnancies of a non-specific alkaline phosphatase isoenzyme which appears as an "enzyme marker" in maternal circulating neutrophils.
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Affiliation(s)
- J Grozdea
- Service Universitaire d'Hématologie, INSERM, CNRS, CHU de Rangueil, Toulouse, France
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46
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Vergnes H, Grozdea J, Brisson-Lougarre A, Bourrouillou G, Blum C, Martin J, Colombies P. An enzymatic marker in mothers of trisomy 21 children: neutrophil alkaline phosphatase. Enzyme 1988; 39:174-80. [PMID: 2454188 DOI: 10.1159/000469114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Neutrophil alkaline phosphatase (NAP) from 12 mothers of normal children was investigated and the results compared to those of 7 mothers with trisomy 21 offsprings, in an attempt to determine a parental molecular change in this chromosomal abnormality. The biochemical properties of the enzyme were analyzed by the procedures of isoenzyme characterization, i.e. enzyme assays, thermostability, inhibition patterns and slab gel electrophoresis. Immunological properties were determined on 5 samples from normal mothers and on the same sample number of mothers with affected children. In these latter NAP showed characteristics that were to some extent different from the ones of normal controls. The following changes were observed: highly significant loading of membrane and nucleus pellets in NAP activity, poor effect of inhibitors on thermostable component and immunodepletion measured by a significant decrease of the normal affinity for antiliver and antiplacental alkaline phosphatase antisera. These findings are discussed in the light of our knowledge of alkaline phosphatase isoenzymes.
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Affiliation(s)
- H Vergnes
- Laboratoire d'Enzymologie, INSERM, CNRS, CHU de Rangueil, Toulouse, France
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47
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Grozeda J, Brisson-Lougarre A, Vergnes H, Bierme R, Alie-Daram S, Martin J, Fournie A. IgG/Placental Alkaline Phosphatase Complexes in
Rh-Incompatible Pregnancy with Fetal Hydrops. Vox Sang 1988. [DOI: 10.1159/000461829] [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: 11/19/2022]
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48
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Arnaud J, Gutierrez N, Tellez W, Vergnes H. Haematology and erythrocyte metabolism in man at high altitude: an Aymara-Quechua comparison. Am J Phys Anthropol 1985; 67:279-84. [PMID: 4061583 DOI: 10.1002/ajpa.1330670313] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In the course of haematological and biological investigations among Aymara and Quechua populations in Bolivia, an anthropological study of the erythrocytary respiratory function was carried out on the two groups at two altitudes: 3,600 m and 450 m. A difference in the intensity of the biological variations of the two populations is observed at high altitude. In the Quechuas, as in any lowland native, the adaptative phenomena are totally and quickly reversible. In the Aymaras, we detected the existence of more marked haematological and biochemical characters: moderate polycythemia, hyperhaemoglobinemia, microcytosis, metabolical hyperactivity with accumulation of 2-3 di-phosphoglycerate and ATP, and methaemoglobinemia with a drop in the activity of the methaemoglobin reductases. The Aymaras preserve some of those characters (methaemoglobinemia excepted) when they settle in lowlands.
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Grozdea J, Maret A, Vergnes H, Bourrouillou G, Verdier J, Martin J, Salvayre R, Colombies P. Cytochemical and biochemical studies on neutrophil alkaline phosphatase in parents of trisomy 21 children. Hum Genet 1984; 67:313-6. [PMID: 6236144 DOI: 10.1007/bf00291360] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A study of karyotypes and neutrophil alkaline phosphatase (NAP) was carried out for 66 parents (33 couples) of trisomy 21 children and for 60 control parents (30 couples). Enzyme activity was determined simultaneously by biochemical and cytochemical techniques. In the mothers of trisomy 21 children we found: (a) by biochemical techniques, a significant increase of NAP activity in polymorphonuclear leukocyte (PMN) homogenates (P less than 0.01) and a lower supernatant/pellet ratio (P less than 0.01); (b) by cytochemical techniques (with or without thermal and urea treatments) NAP activity was significantly higher (P less than 0.001) than in control mothers; in the fathers, the two techniques gave normal NAP activity results.
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