Littérature scientifique sur le sujet « Détection pesticide »
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Articles de revues sur le sujet "Détection pesticide"
Truchot, Eric, Christian Gertz, S. Klostermann et S. Parkash Kochhar. « Détection et dosage des résidus de pesticides dans les matières grasses ». Oléagineux, Corps gras, Lipides 10, no 4 (juillet 2003) : 304–5. http://dx.doi.org/10.1051/ocl.2003.0304.
Texte intégralBriand, O., R. Seux, M. Millet et M. Clément. « Influence de la pluviométrie sur la contamination de l'atmosphère et des eaux de pluie par les pesticides ». Revue des sciences de l'eau 15, no 4 (12 avril 2005) : 767–87. http://dx.doi.org/10.7202/705480ar.
Texte intégralLanglois, C. « Etude préliminaire de la qualité des eaux de surface de 15 cours d’eau majeurs du Nouveau-Québec ». Water Quality Research Journal 22, no 4 (1 novembre 1987) : 530–44. http://dx.doi.org/10.2166/wqrj.1987.043.
Texte intégralAssogba, Komlan, Sikirou Rachidatou, Adrien Boko, Charlotte Adje, Victoire Ahle, Raymond Vodouhe, Assa Ayémou, Enoch Achigan et Prudent Anihouvi. « Pratiques culturales et teneur en éléments anti nutritionnels (nitrates et pesticides) du Solanum macrocarpum au sud du Bénin ». African Journal of Food, Agriculture, Nutrition and Development 7, no 15 (7 juillet 2007) : 01–21. http://dx.doi.org/10.18697/ajfand.15.ipgri2-3.
Texte intégralBERTIN, H., N. NOYON, J. ENAULT, I. BAUDIN, J. F. ROBIN, M. ESPERANZA et A. BREHANT. « Problématique du fosétyl-aluminium en eau potable ». Techniques Sciences Méthodes 12 (20 janvier 2023) : 149–60. http://dx.doi.org/10.36904/202212149.
Texte intégralGermain, A., et C. Langlois. « Contamination des eaux et des sédiments en suspension du fleuve Saint-Laurent par les pesticides organochlores, les biphényles polychlores et d’autres contaminants organiques prioritaires ». Water Quality Research Journal 23, no 4 (1 novembre 1988) : 602–14. http://dx.doi.org/10.2166/wqrj.1988.047.
Texte intégralThèses sur le sujet "Détection pesticide"
Lu, Guofeng. « Détection électrochimique de pesticide et dépôt de film à l’interface liquide-liquide ». Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0231.
Texte intégralModern electrochemistry at the liquid-liquid interface, also termed the interface between two immiscible electrolyte solutions (ITIES), has been investigated for over a century due to its special interface properties. It provides a unique platform to allows the non-redox electrochemical detection of ions ranging from protons to macromolecules across the soft molecular interface that is intrinsically defect-free and self-healing. Additionally, the ITIES can act as a scaffold to electrodeposit nanometer-sized objects or charged molecules in arrange film. This thesis is intended for the pesticide detection and electrodeposited films at ITIES. In the first part, we made an effort to detect pesticides at micro-ITIES due to its cost-effectiveness. Due to the miniaturization of ITIES, the micro-pore capillary can be as a support to construct a liquid-liquid interface. Thus, the accumulation of analytes from a solution close to neutral pH into an organic phase through an automatic transfer at open-circuit potential is possible and increasing the detection signal. This strategy is successful for ametryn but is failed for the detection of Imidacloprid and Metam sodium. In the second part, we developed silica deposition at Micro-ITIES. The objective of the silica membrane at ITIES is to focus on improving the selectivity for ion transfer. Electrochemical experiments at the liquid-liquid interface revealed that the TMA+ transfer is blocked by the presence of silica film. However, electrodeposit silica at Micro-ITIES is not accurately reproduced due to the geometry limitation. Furthermore, the ex-situ measures are hardly achieved. In the third part, we realized chitosan electrodeposition at ITIES. Chitosan films act as membrane for ion transfer and presented positive charge, which could provide the adsorption effect for negative ion. To improve the structure of chitosan film, the cross-linker Terephthalaldehyde (TPA) is introduced into the organic phase. We demonstrated a protocol for controlling the interfacial reaction with the variable concentration of cross-linker in the organic phase, and the precursor is limited in the aqueous phase. Therefore, we obtained different types of chitosan films
Farouil, Léa. « Etudes théorique et expérimentale de semi-conducteurs organiques pour l'élaboration d'un biocapteur destiné à la détection de la pollution de l'eau ». Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30310/document.
Texte intégralThe aim of this thesis is to develop an organic photodiode (OPD) designed to be integrated into a biosensor. It is part of the broader framework of studying and improving organic components involved into devices devoted to water pollution monitoring. The need for such portable, fast-response, low-cost microsystems is of great interest. The measurement is based on the fluorescence detection of micro-algae under toxic substances exposure. The excited algae, under a blue light emitting diode (LED), will emit a fluorescence signal whose intensity, modified because of pollutant exposure (Diuron), is detected by the OPD. Since the fluorescence signal is very weak, the ideal OPD must have a low dark current and a high sensitivity. To achieve this performance, a judicious choice of organic semiconductor materials (OSC) used for the OPD is required. In addition, it is interesting to investigate their physico-chemical properties by rationalizing the mechanisms involved in the active layer (photon absorption phenomena, charge transport mechanisms, and losses associated with charge recombinations). This thesis is based on two axes. The first one consists in a theoretical study of the charge exchanges at a nanoscale. This have been done by both optical characterizations and quantum chemistry calculations based on DFT and TD-DFT methods. Calculations were performed on a model system (P3HT) thus providing the basis for a very promising computational protocol for studying the properties of materials of interest, for instance PTB7. The second axis concerns the experimental study of the OPD based on PTB7:PC60BM. We have developed, characterized and optimized an OPD guarantying the detection of algal fluorescence without and with Diuron at about nanomolar concentrations
Boussenadji, Ramdane. « Détection UV et électrochimique en microchromatographie en phase liquide : applications : antioxydants et pesticides ». Lyon 1, 1992. http://www.theses.fr/1992LYO10221.
Texte intégralYamani, Hayat el. « Mesure de la toxicité de polluants par biocapteur. Réalisation d'une électrode à butyrylcholinestérase. Automatisation de la détection de pesticides ». Paris, ENMP, 1987. http://tel.archives-ouvertes.fr/tel-01066089.
Texte intégralZara, Lorena. « Développement de biocapteurs à base d'aptamères pour la détection de petites molécules Engineering Light-Up Aptamers for the Detection of RNA Hairpins through Kissing Interaction Anti-Pesticide DNA Aptamers Fail to Recognize their Targets with Asserted Micromolar Dissociation Constants A malachite green light-up aptasensor 1 for the detection of 2 theophylline ». Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALV033.
Texte intégralNowadays, there is an urgency to detect small molecules (molecular weight < 1000 g/mol) such as pesticides, toxins, antibiotics or drug residues to protect both human and environment health. It is very important to create a cost effective and simple to use sensor system able to rapidly quantify small molecules, with high efficiency of measurements. In this context, aptamers that are RNA or DNA oligonucleotides displaying high affinity and specificity for their cognate target can be used as molecular recognition element in biosensors. These biosensors called aptasensors can provide a valid and interesting alternative to conventional methods.The aim of this thesis consists in engineering new specific aptasensors based on the coupling of two strategies: light-up and kissing-complex. Firstly, we designed a fluorescent aptamer-based sensing specific of two microRNA precursors: let-7b and miR206. In a second time, based on this construct, we create a label free fluorescent double-switch aptasensor to detect theophylline. Finally, in the third work, two aptamer-based fluorescence anisotropy approaches, using the displacement concept, are investigated to detect pesticides including isocarbophos and phorate
Béguin, Sylvie. « Développement d'une méthode d'optimisation des conditions de détection GC/EI/MS/MS à l'aide d'un piège ionique quadripolaire : application au dosage multi-résidus de pesticides ». Angers, 2002. http://www.theses.fr/2001ANGE0016.
Texte intégralMarquette, Christophe A. « Immunobiocapteurs à transduction électrochimique et-ou optique pour la détection de toxines planctoniques et de pesticides ». Lyon 1, 1999. http://www.theses.fr/1999LYO10278.
Texte intégralWan, Kai. « Etude de différentes méthodes de biofonctionnalisation pour la réalisation de biocapteurs. Application à la détection de pesticides ». Ecully, Ecole centrale de Lyon, 1999. http://bibli.ec-lyon.fr/exl-doc/TH_T1819_kwan.pdf.
Texte intégralEl, Alami Amal. « Mise en oeuvre de biocapteurs en vue de la détection de pesticides dans l'eau par diffusion Raman exaltée ». Thesis, Le Mans, 2017. http://www.theses.fr/2017LEMA1010/document.
Texte intégralSurface-enhanced Raman scattering (SERS) was used to develop a biosensor for the detection of pesticides through the monitoring of the enzymatic activity of acetylcholinesterase (ACHE). Gold nanoparticles (AuNPs) were used as an active SERS substrate. The enhanced Raman signal of the analyte is optimized by testing several types of nanoparticles. Raman SERS allowed the direct detection of Paraoxon (PO) and carbaryl (CA) pesticides and the possibility of follow-up of the activity of the ACHE. In the absence of inhibitors, the acetylcholine (ATC) is transformed into acetic acid and choline by the enzyme ACHE. The measurement of ACHE activity is performed through the monitoring of ATC concentrations because its transformation is inhibited in the presence of pesticides. Results showed a linear correlation between the concentration of pesticides and the SERS signal of the untransformed ATC. The method was optimized for the quantification of paraoxon and carbaryl with a limit of quantification much lower than the one obtained with a direct detection. Their identification was also possible using chemometrics. This biosensors, based on the ACHE activities, was applied to the evaluation of emergent pollutants: additives of commercial polymers. Our results suggested that most of the tested polymers contained molecules that act as inhibitors of the ACHE. Finally, we propose another very simple approach to measure the ACHE activity using dynamic light scattering measurements. We found that the physicochemical parameters (aggregation) of AuNPs were strongly influenced by the enzymatic activity of ACHE when in contact with specified molecules, allowing to detect the presence of PO
Stepurska, Kateryna. « Développement d'une procédure originale pour la multi-détection de composés toxiques utilisant des biocapteurs à base d'acétylcholinestérase ». Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1067/document.
Texte intégralInvestigations reported in this manuscript are focused on the development of an original approach for the detection of several toxic compounds, mainly aflatoxins and organophosphorus pesticides, using acetylcholinesterase (AChE)-based inhibitory electrochemical biosensors. In a first step, a new potentiometric biosensor using pH Sensitive Field-Effect Transistors (pH-FETs) as transducers was investigated for aflatoxin B1 (AFB1) determination and different elaboration and working parameters were optimized. The proposed biosensor was characterized by high operational stability and reproducibility of the signal during the work as well as during the storage. The biosensor was further evaluated for real samples analysis (wheat, sesame, walnuts and peas) and a mathematical simulation of the potentiometric biosensor response to aflatoxin B1 was proposed for the first time and validated. In a second step, a conductometric biosensor using interdigitated gold microelectrodes was developed. The sensitivity of the biosensor to aflatoxins and other classes of toxic substances, such as organophosphorus pesticides, heavy metals ions, glycoalkaloids, and surfactants, was determined. A new and original procedure, enabling the selective determination of multiclass toxins by applying successive reactivation solutions targeting either irreversible or reversible inhibitors, was finally proposed. Using this method, the electrochemical enzyme inhibitory biosensors could be applied to the analysis of aflatoxins and organophosphorus pesticides, as well as for the determination of total toxicity of the samples