Дисертації з теми "Compatibilité physico-chimique de médicaments"
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Roche, Marine. "Développement de méthodes analytiques pour l'étude de la stabilité et de la compatibilité de médicaments sous forme de solution ou de systèmes dispersés. Application en anesthésie-réanimation." Electronic Thesis or Diss., Université de Lille (2022-....), 2024. http://www.theses.fr/2024ULILS021.
Повний текст джерелаThe research subject of this PhD focused on the development of analytical methods to assess the stability or incompatibilities of injectable anaesthetic drugs in solution or in dispersed systems.The first part of this work involved a study of the stability of cisatracurium besylate ampoules produced by the pharmacy of Lille University Hospital to ensure continuity of care for intensive care patients in the context of supply disruptions caused by the COVID-19 pandemic. The stability study was conducted on a batch of 4,000 ampoules stored at 2-8°C for 18 months. This study required the validation of a stability-indicating HPLC-UV method for the determination of cisatracurium and laudanosine, one of its degradation products described as a marker of its instability. In addition, the use of an HPLC-mass spectrometry method enabled the identification of degradation products and the study of degradation pathways. Our results showed that cisatracurium solutions at 10mg/mL were stable for 15 months under our preparation and storage conditions. The main degradation pathway observed under our study conditions (ester hydrolysis) differed from that previously described (Hofmann pathway). This highlights the imponderability of conducting stability studies under conditions representative of the actual use of drugs. The second part of this thesis led us to study the incompatibility between different drugs used in anaesthesia and intensive care units. The models studied were the simultaneous administration of propofol and alpha-2 adrenergic receptor agonists (α2A; clonidine or dexmedetomidine) used in multimodal analgesia. The data available in the literature refers to concentrations and ratios that are not representative of those encountered in hospital wards, potentially exposing patients to drug hazards. We assessed the compatibility of propofol-α2A combinations under conditions mimicking those encountered in critical care units. Eight conditions per combination were evaluated over 96 hours, in triplicate, varying the simulated mass flow rates for each drug and for patient weights of 45 and 150 kg. To assess the chemical compatibility of these combinations, we developed and validated 3 stability-indicating HPLC-UV assay methods to study the stability of propofol, clonidine and dexmedetomidine in combination for 96 hours. The physical compatibility of the emulsion in combination was assessed using a granulometer coupled to a zeta potential measurement (with positive and negative controls). Our results demonstrated the physico-chemical stability of propofol-α2A mixtures representative of those used in current practice.In conclusion, the results of this work have provided scientific validation of hospital pharmacy and care service practices. They also highlighted the fundamental role of pharmacists in guaranteeing the quality of patient drug management, by using their skills in analytical chemistry to assess compatibility and stability data
Deshayes, Sébastien. "Caractérisation physico-chimique de peptides pour la vectorisation d'agents thérapeutiques." Montpellier 2, 2005. http://www.theses.fr/2005MON20005.
Повний текст джерелаBenhalima, Nacéra. "Enrobages gastro-résistants : interaction principe actif-agent filmogène : étude galénique et physico-chimique." Montpellier 1, 1988. http://www.theses.fr/1988MON13505.
Повний текст джерелаAmmoury, Nazih. "Étude physico-chimique et biologique de vecteurs colloi͏̈daux vésiculaires d'indométacine, acide polylactique." Paris 11, 1990. http://www.theses.fr/1990PA114836.
Повний текст джерелаBehar, Nicole. "Étude physico-chimique de la libération de médicaments inclus dans des cyclodextrines associées à des polymères." Paris 12, 1989. http://www.theses.fr/1989PA120007.
Повний текст джерелаGautier, Sandrine. "Hydrophobisation du vecteur poly(L-lysine citramide) : comportement physico-chimique et aptitude à solubiliser des molécules lipophiles dans l'eau." Montpellier 1, 1995. http://www.theses.fr/1995MON13503.
Повний текст джерелаChaloin, Laurent. "Synthèse et caractérisation physico-chimique de peptides pour la vectorisation d'agents thérapeutiques." Montpellier 1, 1998. http://www.theses.fr/1998MON1T005.
Повний текст джерелаSaint-Lorant, Guillaume. "Formulation, caractérisation physico-chimique et évaluation biologique de nanovecteurs lipidiques d'une tripentone en vue du traitement de tumeurs ovariennes." Caen, 2009. http://www.theses.fr/2009CAEN4003.
Повний текст джерелаThe aims of this project are to allow the powerful anti-cancerous activity of a new cytotoxic agent belonging to the tripentone family to act in vivo on chemoresistant ovarian cancers thanks to drug delivery systems in the nanometer range which allows the bypassing of the relative insolubility of the molecule in a physiological medium which hinders its biodistribution. This work permits the formulation, thanks to a simple process which uses only biocompatible excipients without organic solvents, of a new generation of lipidic nanoparticles. Their characterization shows in particular that they are able to encapsulate the active substance with a high loading rate. The cytotoxic activity of the tripentone observed on the chemoresistant ovarian tumoral cells SKOV3 is conserved after encapsulation in vitro. Toxicological studies conducted on immunocompetent mice showed the absence of toxic effect of free tripentone, the non-toxicity of the carrier and the modification of the biodistribution of the encapsulated tripentone objectivized by the observation of the toxicity of the encapsulated tripentone at a dosage of 100 mg/kg. Since the encapsulated tripentone generates no toxicity at the dosage of 50 mg/kg, this dosage was retained for studies of the evaluation of antitumoral activity in vivo, on two models of ovarian tumors (subcutaneous tumors and peritoneal carcinosis) established in nude mice by xenograft of SKOV3 cells. Results obtained show the probable necessity of increasing the quantity of available tripentone to match the tumor, notably by the development of a system of active targeting
Rakotomanga, Patricia Iharilanto Andrianjafy. "Approches galénique et réglementaire appliquées à l'étude physico-chimique, pharmaco-technique et pharmacologique d'antihypertenseurs échantillonnés à Madacascar." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0010.
Повний текст джерелаLike many countries in the world, Madagascar has returned in its health policy, the use of generic drugs, because of their lower cost, to facilitate access to health care of the population. The promotion of generic drugs needs to ensure their quality compared to reference drugs. A study was conducted to contribute to the improvement of practices and drug regulatory system in Madagascar . For this, the pharmaceutical environment and the registration of generic drugs in this country with those of other countries are presented. Then quality control tests were performed on twenty two antihypertensive drugs including four referent specialties and eighteen specialties considered as their generic, sampled in Madagascar . The choice of this therapeutic family was governed by the constant increase in the number of patients suffering from hypertension, associated with the difficulty of treatment. For the eighteen specialties considered as generics, non-compliances with standards were recorded at the end of the physicochemical and pharmacotechnical tests and pharmacological studies. Only one specialty was shown to present similar characteristics, including dissolution kinetics and pharmacological results, as the reference. Recommendations involving all stakeholders of the pharmaceutical field have been brought from the study
Abbas, Djamila. "Synthèse, étude physico-chimique et préformulation d'un dérivé pyrido[3,2g]quinoléine triméthyle." Electronic Thesis or Diss., Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX22962.
Повний текст джерелаMulti-drug resistance represent a major problem for chemotherapy unsuccessful in oncology, parasitoly and bacteriology. The new molecules which reverse this phenomenon were discovered.The pyrido[3,2-g]quinolines family which are substituted by various alkylamine side chains and various substituents on the heterocyclic moiety was prepared and the in vitro activity against the multi-drug resistance was showed.With the aim to show the processes of the new biological compound from his synthesis to the galenic form, the 4,6-Bis[2’(diéthylamino)éthoxy]2,8,10-triméthylpyrido[3,2-g]quinoline (BG 637) was chosen. To characterize BG 637, techniques such as Differentiel Scanning Calorimetry (DSC), Fourier Transform Infrared spectrometry (FT-IR), Ultra Violet spectrometry (UV), Mass spectrometry (GC/MS) coupled with Gas Chromatography, Nuclear Magnetic Resonance (NMR) and X-Ray Powder Diffraction (XRPD) were used. Several of them were also used to show the stability of the drug during various storage conditions.DSC supported by FT-IR and UV were used as the screening techniques for assessing the compatibility of BG 637 with several commonly used pharmaceutical excipients. These results showed that BG 637 is a very stable compound and compatible with several pharmaceutical excipients. Finally, the appropriate formulation for direct compression was determined
Depollier, Julien. "Caractérisation structurale et physico-chimique de peptides inhibiteurs de la transcriptase inverse (RT) du virus du SIDA (VIH-1)." Montpellier 2, 2004. http://www.theses.fr/2004MON20169.
Повний текст джерелаNgoya, Sandra. "Caractérisation physiologique et physico-chimique des Pseudomonas Fluorescens productrices ou non de biosurfactants. Première approche du comportement bioadhésif." Rouen, 2007. http://www.theses.fr/2007ROUES054.
Повний текст джерелаPseudomonas fluorescens is a psychrotrophic ubiquitous bacterium which is found in several environments, including grounds and marine or fresh water and air, but also associated to eukaryote hosts (plants, animals and human). Biosurfactants are a tensioactive class of molecules, structurally varied and synthesised by many micro-organisms. Many studies revealed that biosurfactants have a limiting effect to the bacterial adhesion on surface. Because of the outer membrane constituting the first barrier between the cell and the environment, we studied the effects of biosurfactants on surface membrane physicochemical properties. Surface actives compounds were searched for many Pseudomonas fluorescens strains from various environments such as hospitals, plants and rhizosphere according to the temperature of culture of the bacteria. Several biosurfactants identified in these bacteria are cyclic lipopeptides (CLP). These CLP are mostly known for their antifungal or antibiotic properties on rhizosphere. Our studies revealed many possibilities of CLP production at 17°C, including some unidentified or even discovered yet. This exclusive presence of CLP is independent of the origin of isolation of strains and varies depending on temperature. For bacteria strains producer or not of CLP, morphologic, physiochemical and haemolytic characterization show that biosurfactants, depending on their polarities, might induced many modifications linked to bacteria surfaces parameters. Some studies allowing the bacteria evaluation behaviour during the first stage of adhesion on surfaces, have demonstrated that these intra species changes are associated to the surface composition and also to micro-environment
Cauzzi, Nicolas. "Evaluation de l'éco-compatibilité de sédiments contaminés, traités ou non par un procédé physico-chimique, dans le cadre d'un scénario de dépôt en gravière." Lyon, INSA, 2007. http://theses.insa-lyon.fr/publication/2007ISAL0041/these.pdf.
Повний текст джерелаIn order to assess the ecocompatibility of gravel pits disposal of treated and non treated sediments by a physico-chemical process, bioassays were carried out with 2-liters and 100-liter aquatic microcosms. Biological criteria and physico-chemical parameters were assessed to give an ecotoxicological assessment of sediments aquatic disposal effects on aquatic ecosystems. This study shows that the destruction of organics pollutants and the reduction of heavy metals mobility (except for hexavalent chromium in some treated materials) linked to the process improve the materials stability during sedimentation and deposited states. Simultaneously, a reduction of ecotoxic effects of the tested materials on the biocenosis exposed in the microcoms can be observed. These results demonstrate the potential effects of the process in the improvement of the ecocompatibility of the tested materials in the case of microcosms bioassays
Abbas, Djamila. "Synthèse, étude physico-chimique et préformulation d'un dérivé pyrido[3,2g]quinoléine triméthyle." Thesis, Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX22962/document.
Повний текст джерелаMulti-drug resistance represent a major problem for chemotherapy unsuccessful in oncology, parasitoly and bacteriology. The new molecules which reverse this phenomenon were discovered.The pyrido[3,2-g]quinolines family which are substituted by various alkylamine side chains and various substituents on the heterocyclic moiety was prepared and the in vitro activity against the multi-drug resistance was showed.With the aim to show the processes of the new biological compound from his synthesis to the galenic form, the 4,6-Bis[2’(diéthylamino)éthoxy]2,8,10-triméthylpyrido[3,2-g]quinoline (BG 637) was chosen. To characterize BG 637, techniques such as Differentiel Scanning Calorimetry (DSC), Fourier Transform Infrared spectrometry (FT-IR), Ultra Violet spectrometry (UV), Mass spectrometry (GC/MS) coupled with Gas Chromatography, Nuclear Magnetic Resonance (NMR) and X-Ray Powder Diffraction (XRPD) were used. Several of them were also used to show the stability of the drug during various storage conditions.DSC supported by FT-IR and UV were used as the screening techniques for assessing the compatibility of BG 637 with several commonly used pharmaceutical excipients. These results showed that BG 637 is a very stable compound and compatible with several pharmaceutical excipients. Finally, the appropriate formulation for direct compression was determined
Yanze, Maximun Frédéric. "Recherches pharmacotechnique, physico-chimique et biomédicale sur les formes pharmaceutiques solides orales d'action rapide des médicaments du paludisme à Plasmodium falciparum." Montpellier 1, 2000. http://www.theses.fr/2000MON13511.
Повний текст джерелаMaherani, Behnoush. "Encapsulation et vectorisation de molécules biofonctionnelles par des nanoliposomes : étude des propriétés physico-chimiques et des mécanismes de transfert à travers la membrane liposomale." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0098/document.
Повний текст джерелаFrom a molecular point of view, transport of small molecules across lipid bilayers is a fundamental and functional process. The release of efficacious dose of bioactive-entrapped in liposome depends on different parameters such as liposome permeability, bioactive structural properties and strength of liposome / bioactive interaction. The aim of this study was investigation the possible mechanisms of hydrophilic molecules transfer through liposomal bilayer. Calcein was chosen as model of hydrophilic drugs. In the first step, we optimized liposome formulation by considering its physicochemical properties (size, encapsulation efficiency, fluidity and etc.) by different methods such as DSC, TEM, SAXS, DLS, NMR and Spectroufluremtere. The reported results show that mean size, zeta potential, Tc, entrapment efficiency and fluidity were influenced by liposome lipid composition. Then, we tried to investigate hydrophilic bioactive agents? interaction with liposome by Raman Spectroscopy, Langmuir Balance and Differential Scanning Calorimetry. The obtained results indicated that calcein is being able to interact with the choline polar-head group of the lipids but probability it could intercalate into the acyl chains and disturb the chain order. Finally, the permeability of calcein across some liposome membranes was first evaluated on the basis of the first-order kinetics by spectrofluorometer. Second, the composition/fluidity effect of liposome as well as the incubation temperature/pH effect was investigated. Furthermore, a model simulating the conditions of digestion was developed to estimate the partition coefficient and to determine the mechanism transfer through liposomal bilayer by using AFM and STED methods. The results confirmed that calcein permeates slowly through liposomal membrane by diffusion without liposome disruption