1
|
Maaref A, Ali Hamza M, Martin JR, Clechet P. Caractérisation électrique d'hétérostructures Si/Si3N4/solution
électrolytique aqueuse à différents pH. ACTA ACUST UNITED AC 2017. [DOI: 10.1051/jcp/1988850529] [Citation(s) in RCA: 2] [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: 11/15/2022]
|
2
|
Chrouda A, Sbartai A, Baraket A, Renaud L, Maaref A, Jaffrezic-Renault N. An aptasensor for ochratoxin A based on grafting of polyethylene glycol on a boron-doped diamond microcell. Anal Biochem 2015; 488:36-44. [PMID: 26255699 DOI: 10.1016/j.ab.2015.07.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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: 06/05/2015] [Revised: 07/19/2015] [Accepted: 07/22/2015] [Indexed: 11/19/2022]
Abstract
A novel strategy for the fabrication of an electrochemical label-free aptasensor for small-size molecules is proposed and demonstrated as an aptasensor for ochratoxin A (OTA). A long spacer chain of polyethylene glycol (PEG) was immobilized on a boron-doped diamond (BDD) microcell via electrochemical oxidation of its terminal amino groups. The amino-aptamer was then covalently linked to the carboxyl end of the immobilized PEG as a two-piece macromolecule, autoassembled at the BDD surface, forming a dense layer. Due to a change in conformation of the aptamer on the target analyte binding, a decrease of the electron transfer rate of the redox [Fe(CN)6](4-/3-) probe was observed. To quantify the amount of OTA, the decrease of the square wave voltammetry (SWV) peak maximum of this probe was monitored. The plot of the peak maximum against the logarithm of OTA concentration was linear along the range from 0.01 to 13.2 ng/L, with a detection limit of 0.01 ng/L. This concept was validated on spiked real samples of rice.
Collapse
Affiliation(s)
- A Chrouda
- Laboratory of Interfaces and Advanced Materials, University of Monastir, 5019 Monastir, Tunisia; University of Lyon, Institute of Analytical Sciences, UMR CNRS 5280, 69100 Villeurbanne, France
| | - A Sbartai
- University of Lyon, Institute of Analytical Sciences, UMR CNRS 5280, 69100 Villeurbanne, France
| | - A Baraket
- University of Lyon, Institute of Analytical Sciences, UMR CNRS 5280, 69100 Villeurbanne, France
| | - L Renaud
- University of Lyon, Institute of Nanotechnology of Lyon, UMR CNRS 5270, 69622 Villeurbanne Cedex, France
| | - A Maaref
- Laboratory of Interfaces and Advanced Materials, University of Monastir, 5019 Monastir, Tunisia
| | - N Jaffrezic-Renault
- University of Lyon, Institute of Analytical Sciences, UMR CNRS 5280, 69100 Villeurbanne, France.
| |
Collapse
|
3
|
Bourourou M, Holzinger M, Elouarzaki K, Le Goff A, Bossard F, Rossignol C, Djurado E, Martin V, Curtil D, Chaussy D, Maaref A, Cosnier S. Laccase wiring on free-standing electrospun carbon nanofibres using a mediator plug. Chem Commun (Camb) 2015; 51:14574-7. [DOI: 10.1039/c5cc03906a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enzyme laccase was wired on a free-standing electrospun carbon fiber mat using a cross-linker plug based on the pyrene modified electron shuttle ABTS.
Collapse
Affiliation(s)
- M. Bourourou
- Univ. Grenoble Alpes - CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
- Laboratoire des Interfaces et des Matériaux Avancés
| | - M. Holzinger
- Univ. Grenoble Alpes - CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - K. Elouarzaki
- Univ. Grenoble Alpes - CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - A. Le Goff
- Univ. Grenoble Alpes - CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| | - F. Bossard
- Univ. Grenoble Alpes – CNRS
- LRP
- F-38000 Grenoble
- France
| | | | - E. Djurado
- Univ. Grenoble Alpes
- LEPMI
- F-38000 Grenoble
- France
| | - V. Martin
- Univ. Grenoble Alpes
- LEPMI
- F-38000 Grenoble
- France
| | - D. Curtil
- LGP2 (Laboratory of Pulp and Paper Science and Graphic Arts)
- Grenoble INP-Pagora/CNRS UMR
- 38402 Grenoble
- France
| | - D. Chaussy
- LGP2 (Laboratory of Pulp and Paper Science and Graphic Arts)
- Grenoble INP-Pagora/CNRS UMR
- 38402 Grenoble
- France
| | - A. Maaref
- Laboratoire des Interfaces et des Matériaux Avancés
- Faculté des Sciences de Monastir-Université de Monastir
- Tunisia
| | - S. Cosnier
- Univ. Grenoble Alpes - CNRS
- DCM UMR 5250
- F-38000 Grenoble
- France
| |
Collapse
|
4
|
Haddi Z, Alami H, El Bari N, Tounsi M, Barhoumi H, Maaref A, Jaffrezic-Renault N, Bouchikhi B. Electronic nose and tongue combination for improved classification of Moroccan virgin olive oil profiles. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.09.036] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
5
|
Haddi Z, Mabrouk S, Bougrini M, Tahri K, Sghaier K, Barhoumi H, El Bari N, Maaref A, Jaffrezic-Renault N, Bouchikhi B. E-Nose and e-Tongue combination for improved recognition of fruit juice samples. Food Chem 2013; 150:246-53. [PMID: 24360446 DOI: 10.1016/j.foodchem.2013.10.105] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [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: 07/18/2012] [Revised: 10/08/2013] [Accepted: 10/24/2013] [Indexed: 11/16/2022]
Abstract
There are many important challenges related to food security analysis by application of chemical and electrochemical sensors. One critical parameter is the development of reliable tools, capable of performing an overall sensory analysis. In these systems, as much information as possible is required in relation to smell, taste and colour. Here, we investigated the possibility of using a multisensor data fusion approach, which combines an e-Nose and an e-Tongue, adept in generating combined aroma and taste profiles. In order to shed light on this concept, classification of various Tunisian fruit juices using a low-level of abstraction data fusion technique was attempted. Five tin oxide-based Taguchi Gas Sensors were applied in the e-Nose instrument and the e-Tongue was designed using six potentiometric sensors. Four different commercial brands along with eleven fruit juice varieties were characterised using the e-Nose and the e-Tongue as individual techniques, followed by a combination of the two together. Applying Principal Component Analysis (PCA) separately on the respective e-Nose and e-Tongue data, only few distinct groups were discriminated. However, by employing the low-level of abstraction data fusion technique, very impressive findings were achieved. The Fuzzy ARTMAP neural network reached a 100% success rate in the recognition of the eleven-fruit juices. Therefore, data fusion approach can successfully merge individual data from multiple origins to draw the right conclusions that are more fruitful when compared to the original single data. Hence, this work has demonstrated that data fusion strategy used to combine e-Nose and e-Tongue signals led to a system of complementary and comprehensive information of the fruit juices which outperformed the performance of each instrument when applied separately.
Collapse
Affiliation(s)
- Z Haddi
- Sensor Electronic & Instrumentation Group, Moulay Ismaïl University, Faculty of Sciences, Physics Department, B.P. 11201, Zitoune, 50003 Meknes, Morocco; Université de Lyon, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR CNRS 5280, 5 Rue de la Doua, 69100 Villeurbanne Cedex, France
| | - S Mabrouk
- Laboratoire des Interfaces et des Matériaux Avancés, Université de Monastir, Faculté des Sciences de Monastir 5000, Tunisia
| | - M Bougrini
- Sensor Electronic & Instrumentation Group, Moulay Ismaïl University, Faculty of Sciences, Physics Department, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - K Tahri
- Sensor Electronic & Instrumentation Group, Moulay Ismaïl University, Faculty of Sciences, Physics Department, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - K Sghaier
- Laboratoire des Interfaces et des Matériaux Avancés, Université de Monastir, Faculté des Sciences de Monastir 5000, Tunisia
| | - H Barhoumi
- Laboratoire des Interfaces et des Matériaux Avancés, Université de Monastir, Faculté des Sciences de Monastir 5000, Tunisia
| | - N El Bari
- Biotechnology Agroalimentary and Biomedical Analysis Group, Moulay Ismaïl University, Faculty of Sciences, Biology Department, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - A Maaref
- Laboratoire des Interfaces et des Matériaux Avancés, Université de Monastir, Faculté des Sciences de Monastir 5000, Tunisia
| | - N Jaffrezic-Renault
- Université de Lyon, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR CNRS 5280, 5 Rue de la Doua, 69100 Villeurbanne Cedex, France
| | - B Bouchikhi
- Sensor Electronic & Instrumentation Group, Moulay Ismaïl University, Faculty of Sciences, Physics Department, B.P. 11201, Zitoune, 50003 Meknes, Morocco.
| |
Collapse
|
6
|
Nouira W, Barhoumi H, Maaref A, Renault NJ, Siadat M. Tailoring of analytical performances of urea biosensors using nanomaterials. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/416/1/012010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
7
|
Bourigua S, Maaref A, Bessueille F, Renault NJ. A New Design of Electrochemical and Optical Biosensors Based on Biocatalytic Growth of Au Nanoparticles - Example of Glucose Detection. ELECTROANAL 2012. [DOI: 10.1002/elan.201200243] [Citation(s) in RCA: 11] [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]
|
8
|
Nouira W, Maaref A, Vocanson F, Siadat M, Saulnier J, Lagarde F, Jaffrezic-Renault N. Enhancement of Enzymatic IDE Biosensor Response Using Gold Nanoparticles. Example of the Detection of Urea. ELECTROANAL 2012. [DOI: 10.1002/elan.201100681] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
9
|
Braiek M, Barhoumi H, Maaref A, Jaffrezic-Renault N. Elaboration and Characterization of pH Sensor Based on Polypyrrole Nanowires. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/sl.2011.1769] [Citation(s) in RCA: 5] [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: 11/23/2022]
|
10
|
Nouira W, Maaref A, Siadat M, Errachid A, Jaffrezic-Renault N. Conductometric Biosensors Based on Layer-by-Layer Coated Paramagnetic Nanoparticles for Urea Detection. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/sl.2011.1805] [Citation(s) in RCA: 5] [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: 11/23/2022]
|
11
|
Sahraoui Y, Barhoumi H, Maaref A, Nicole JR. A Novel Capacitive Biosensor for Urea Assay Based on Modified Magnetic Nanobeads. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/sl.2011.1755] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
12
|
Bourigua S, Errachid A, Dzyadevych S, Maaref A, Renault NJ. Impedimetric Urea Biosensor Based on Single-Wall Carbon Nanotubes (SWNCT-COOH) and Polypyrrole. ACTA ACUST UNITED AC 2011. [DOI: 10.1166/sl.2011.1768] [Citation(s) in RCA: 2] [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: 11/23/2022]
|
13
|
Haddi Z, Amari A, Ali AO, Bari NE, Barhoumi H, Maaref A, Jaffrezic-Renault N, Bouchikhi B. Discrimination and identification of geographical origin virgin olive oil by an e-nose based on MOS sensors and pattern recognition techniques. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.proeng.2011.12.280] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
14
|
Bourigua S, Hnaien M, Bessueille F, Lagarde F, Dzyadevych S, Maaref A, Bausells J, Errachid A, Renault NJ. Impedimetric immunosensor based on SWCNT-COOH modified gold microelectrodes for label-free detection of deep venous thrombosis biomarker. Biosens Bioelectron 2010; 26:1278-82. [DOI: 10.1016/j.bios.2010.07.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 07/01/2010] [Accepted: 07/02/2010] [Indexed: 11/25/2022]
|
15
|
Barhoumi H, Maaref A, Jaffrezic-Renault N. Experimental study of thermodynamic surface characteristics and pH sensitivity of silicon dioxide and silicon nitride. Langmuir 2010; 26:7165-7173. [PMID: 20146497 DOI: 10.1021/la904251m] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this report, we have introduced a revision of the chemical treatment influence on the surface thermodynamic properties of silicon dioxide (SiO(2)) and silicon nitride (Si(3)N(4)) solid thin layers. Some characterization techniques might be used to quantify the thermodynamic properties of solid surface and predict its ability in the adhesion phenomenon. In this work, we have used static and dynamic contact angle (CA) measurements to characterize both dioxide solid surfaces being treated by using the two procedures of cleaning and chemical activation. Qualitative and quantitative concepts of analysis, using the Van Oss approach, are based on the determination of dioxide surface hydrophilic and hydrophobic features and the thermodynamic parameters such as free energy, acid, base, and Lewis acid-base surface tension components. Electrochemical capacitance-potential measurements were carried out to study the reactivity of both silicon dioxide and silicon nitride surfaces for pH variation. Furthermore, the surface roughness of these insulators was examined by using the contact angle hysteresis (CAH) measurements and atomic force microscopy (AFM). It was concluded that CA technique can be used as a suitable and base method for the understanding of surface wettability and for the control of surface wetting behavior.
Collapse
Affiliation(s)
- H Barhoumi
- Laboratoire de Physique et Chimie des Interfaces, Faculté des Sciences, Monastir 5000, Tunisia.
| | | | | |
Collapse
|
16
|
Sghaier K, Barhoumi H, Maaref A, Siadat M, Jaffrezic-Renault N. Classification and Discrimination of Different Tunisian Water Samples Using an Electronic Tongue. ACTA ACUST UNITED AC 2009. [DOI: 10.1166/sl.2009.1131] [Citation(s) in RCA: 10] [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: 11/23/2022]
|
17
|
Nouira W, Haddad R, Barhoumi H, Maaref A, Bausells J, Bessueille F, Léonard D, Jaffrezic-Renault N, Errachid A. Na+ and K+ Implanted Membranes for Micro-Sensors Development. ACTA ACUST UNITED AC 2009. [DOI: 10.1166/sl.2009.1132] [Citation(s) in RCA: 5] [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: 11/23/2022]
|
18
|
Haddad R, Cosnier S, Maaref A, Holzinger M. Electrochemical Characterization of Biotin Functionalized and Regular Single-Walled Carbon Nanotube Coatings. Application to Amperometric Glucose Biosensors. ACTA ACUST UNITED AC 2009. [DOI: 10.1166/sl.2009.1151] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Holzinger M, Haddad R, Maaref A, Cosnier S. Amperometric biosensors based on biotinylated single-walled carbon nanotubes. J Nanosci Nanotechnol 2009; 9:6042-6046. [PMID: 19908492 DOI: 10.1166/jnn.2009.1549] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
One challenging goal for the development of biosensors is the conception of three dimensional biostructures on electrode surfaces. In this context, single-walled carbon nanotube coatings (SWCNTs), functionalized by biotin groups, were investigated to develop 3D conductive nanostructures allowing a post-functionalization by biological macromolecules. This specific anchoring of biomolecules was carried via the affinity interactions using the avidin-biotin system. For this purpose, a biotinylated pyrene was specially synthesized to develop a non-covalent functionalization based on pi-interactions between pyrene and the nanotube sidewall. SWCNT coatings were also biotinylated via electropolymerization of biotin-pyrrole derivatives at 0.95 V in CH3CN electrolyte. The resulting biotinylated SWCNTs were modified by an avidin protein via affinity interactions and characterized with scanning electron microscopy. The biofunctionalization by a biotinylated glucose oxidase (GOX) was performed by successive incubation in avidin and GOX aqueous solutions via avidin bridges. The efficiency of the enzyme anchoring was examined through the electro-enzymatic activity of the modified electrodes towards the detection of glucose at 0.7 V versus SCE. The glucose sensitivity and maximum current density were 1.6 mAM(-1) cm(-2) and 131 microAcm(-2) respectively for pyrene biotin-SWCNT electrode and 2.5 mAM(-1) cm(-2) and 178 microAcm(-2) respectively for the poly(pyrrole biotin)-SWCNT.
Collapse
Affiliation(s)
- M Holzinger
- Département de Chimie Moléculaire, UMR CNRS 5250, ICMG FR CNRS 2607, Université Joseph Fourier, BP 53, 38041 Grenoble, Cedex 9, France
| | | | | | | |
Collapse
|
20
|
Haddad R, Cosnier S, Maaref A, Holzinger M. Non-covalent biofunctionalization of single-walled carbon nanotubes via biotin attachment by π-stacking interactions and pyrrole polymerization. Analyst 2009; 134:2412-8. [DOI: 10.1039/b916774a] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Barhoumi H, Maaref A, Martelet C, Jaffrezic-Renault N, Dumazet-Bonnamour I. Comparison of sensing characteristics of ChemFEC devices based on spin-coated thin films of calix[n]arenes. Materials Science and Engineering: C 2008. [DOI: 10.1016/j.msec.2007.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
Barhoumi H, Maaref A, Cosnier S, Martelet C, Jaffrezic-Renault N. Urease immobilization on biotinylated polypyrrole coated ChemFEC devices for urea biosensor development. Ing Rech Biomed 2008. [DOI: 10.1016/j.rbmret.2007.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
23
|
Barhoumi H, Maaref A, Rammah M, Martelet C, Jaffrezic N, Mousty C, Vial S, Forano C. Urea biosensor based on Zn3Al–Urease layered double hydroxides nanohybrid coated on insulated silicon structures. Materials Science and Engineering: C 2006. [DOI: 10.1016/j.msec.2005.10.042] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
24
|
Barhoumi H, Maaref A, Rammah M, Martelet C, Jaffrezic-Renault N, Mousty C, Cosnier S, Perez E, Rico-Lattes I. Insulator semiconductor structures coated with biodegradable latexes as encapsulation matrix for urease☆. Biosens Bioelectron 2005; 20:2318-23. [PMID: 15797333 DOI: 10.1016/j.bios.2004.10.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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: 06/11/2004] [Revised: 10/13/2004] [Accepted: 10/14/2004] [Indexed: 11/28/2022]
Abstract
A new urea biosensor for clinical applications was obtained by immobilization of urease within different latex polymers functionalized by hydroxy, acetate and lactobionate groups. Responses of these biosensors based on pH-ion-selective field effect insulator-semiconductor (IS) systems to urea additions were evaluated by capacitance measurements. UV-visible spectroscopy was used to check the urease activity in various matrixes. A good retention of the catalytic urease activity in the case of the cationic polymers was observed. In addition, rotating disk electrode experiments were carried out to determine the matrix permeability characteristics. Under optimal conditions, i.e. buffer capacity corresponding to 5 mM phosphate buffer, the urea enzyme insulator semiconductor (ENIS) sensors showed a linear response for urea concentrations in the range 10(-1.5) to 10(-4)M. Furthermore, kinetic parameters for the immobilized urease were obtained from Lineweaver-Burk plot. Clearly, a fast response and a good adhesion for the urease-acetate polymer composite films, prepared without using glutaraldehyde as cross-linking agent was observed.
Collapse
Affiliation(s)
- H Barhoumi
- Laboratoire de Physique et Chimie des Interfaces Faculté des Sciences de Monastir, Monastir, Tunisie
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Barhoumi H, Maaref A, Mlika R, Martelet C, Jaffrezic-Renault N, Ponsonnet L. EIS field effect structures functionalized by p-tert-butylcalix[6]arene for Ni2+ detection. Materials Science and Engineering: C 2005. [DOI: 10.1016/j.msec.2004.07.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
26
|
Meriah S, Bergaoui A, Ben Salem R, Maaref A, Khouja H, Ghorbal M, Ben Amor MS. [Report of 2180 laparoscopic tubal ligations with the Yoon ring]. Contracept Fertil Sex (Paris) 1983; 11:991-5. [PMID: 12279635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
|
27
|
Maaref A, Khouja H, Chaar I, Chemmam L, Falfoul A, Meriah S, Ben Amor MS. [Transverse presentation in the Maternity Department of the Habib Thameur Hospital]. Tunis Med 1983; 61:57-60. [PMID: 6680946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|