11 research outputs found

    Use of supercritical CO2 for the sterilization of liposomes: Study of the influence of sterilization conditions on the chemical and physical stability of phospholipids and liposomes.

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    peer reviewedThe effects of four potential supercritical carbon dioxide (ScCO2) sterilization conditions on the chemical stability of 9 phospholipids and on the physicochemical characteristics of liposomes consisting of stable phospholipids, as well as their sterilization efficiency were evaluated. These conditions were : C1 (ScCO2/70 °C/150 bar/240 min), C2 (ScCO2/0.25 % water/ 0.15% H2O2/ 0.5% acetic anhydride/38° C/85 bar/45 min), C3 (ScCO2/0.08 % peracetic acid/35° C/104 bar/180 min) and C4 (ScCO2/200 ppm H2O2/40 °C/270 bar/90 min). The results showed for phospholipids, a significant increase in hydrolysis products of 3.77 to 14.50 % and an increase in oxidation index of 6.10 to 430.50 % with unsaturated phospholipids for all tested conditions while with saturated phospholipids, no significant degradation was observed. Concerning the liposome formulation, no change in dispersion color and no phospholipid degradation were observed. However, a decrease in liposome size from 126.90 nm to 111.80 nm, 96.27 nm, 99.60 nm and 109.13 nm and an increase in the PdI from 0.208 to 0.271, 0.233, 0.285, and 0.298 were found with conditions C1, C2, C3 and C4 respectively. For the sterilization efficiency, conditions C1, C2 and C3 achieved the required sterility assurance level (SAL) of 10-6 for liposomes

    Etude de la qualité de l’eau chlorée et des conditions d’utilisation au Centre Hospitalier Universitaire Sourou Sanou (CHUSS) de Bobo-Dioulasso

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    L’eau chlorée est un désinfectant efficace et facile à préparer. Le département de la pharmacie du Centre Hospitalier Universitaire Sourou Sanou (CHUSS) est chargé de la préparation de l’eau chlorée qui est utilisée dans les services de l’hôpital depuis 2003. La qualité chimique, les conditions de production et d’utilisation de cette eau chlorée demeurent inconnues alors que les normes de bonnes pratiques exigent un contrôle de qualité de la production et de l’utilisation. Le but de cette étude était de contribuer à évaluer la qualité de l'eau chlorée et les conditions d’utilisation au CHUSS.Il s’agissait d’une enquête sur les conditions de production, d’utilisation et une analyse chimique de la qualité de l’eau chlorée. L’étude s’est déroulée du 1er Juillet au 30 Septembre 2014 au CHUSS.Elle a révélé que la production de l’eau chlorée ne respectait pas les recommandations du fabricant de l’appareil de production. La concentration moyenne en chlore actif mesurée à la production (2,74 ± 0,25 g/L) était inférieure à celle attendue (5 g/L). Le pH de l’eau chlorée à la production était de 8,42 ± 0,03. Les conditions d'utilisation étaient parfois non conformes. Des travaux ultérieurs sur l’efficacité microbiologique de cette eau chlorée doivent être envisagés. Mots-clés: désinfectants, eau chlorée, productions, utilisation, CHUSS. English Title: Study of the quality of chlorinated water and the conditions of use at the Sourou Sanou University Hospital Center (CHUSS) in Bobo-Dioulasso. English Abstract Chlorinated water is an effective disinfectant and easy to prepare. The pharmacy department of the University Hospital Center of Sourou Sanou (CHUSS) is responsible for the preparation of chlorinated water which has been used in hospital departments since 2003. The chemical quality, the conditions of production and use of this chlorinated water remains unknown. However, good practice standards require quality control of production and use. The aim of this study was to help assess the quality of chlorinated water and the conditions of use at CHUSS. It was a survey on the conditions of production, use and a chemical analysis of the quality of chlorinated water. The study took place from July 1 to September 30, 2014 at CHUSS. The investigation revealed that the production of chlorinated water did not meet the recommendations of the manufacturer of the production device. The average concentration of active chlorine measured at production (2.74 ± 0.25 g / L) was lower than that expected (5 g / L). The production pH of chlorinated water was 8.42 ± 0.03. The conditions of use were sometimes non-compliant. Further work on the microbiological effectiveness of this chlorinated water should be considered. Keywords: disinfectants, chlorinated water, production, utilisation, CHUS

    Development of a chemical tracer and a chromatographic fingerprint for the quality control of finished products based on hydroethanol extract of fresh leaves of Cassia alata (L.) Roxb (Fabaceae.)

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    SUMMARY Introduction: Cassia alata (L) Roxb belonging to the Fabaceae family is widely used in the treatment of dermatoses. The quality control of herbal products remains very difficult due to their complex phytochemical composition. This study aims to develop a chromatographic fingerprint by thin layer chromatography (TLC) and a chemical tracer characterized by UV spectrophotometry that will be used for phytochemical analysis of a hydroethanol extract of fresh leaves of Cassia alata (L) Roxb (EHCA) and a finished product based on this extract (mitraca soap). Methodology: Phytochemical screening was performed on EHCA. A spectrophotometric analysis was then performed. The tracer of the selected extract was searched in a soap following the guidelines of the European Medicines Agency (EMA). Results: Phytochemical screening revealed the presence of anthracenosides, saponosides, steroidal and triterpene glycosides, leucoanthocyanosides, tannins and flavonoids. A more visible fluorescent orange spot with an Rf of 0.52 ± 0.01 observed at 365 nm was established as tracer. It is detected at a threshold of 0.69 ± 0.01 mg/mL. TLC performed on the extract provided a good separation of this tracer characterized as an anthracenoside. The resolution factor to evaluate the separation with the other peaks was estimated to be 1.83 ± 0.01. This anthracenoside compound showed four absorption maxima at 223, 274, 284, 292 nm. It was also found in the C. alata soap. The orange compound (anthracenoside) is located at Rf 0.52 ± 0.01 at 365 nm similar to that of the initial pure extract. Conclusion: The selected tracer could be used to control the quality of the finished products based on this extract and in particular the soap. Key words: Cassia alata, quality control, tracer, anthracenoside, hydroethanol extract

    Determination of arsenic (III) at a nano gold modified solid carbon paste electrode

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    A selective and sensitive electroanalytical method was developed for arsenic determination based on a nanogold (AuNP) modified solid carbon paste work- ing electrode (SCPE) modified in two steps (i) physisorp- tion and (ii) additional electrodeposition of nanogold par- ticles in the presence of iodide. Copper(II) interference was solved by covering the gold layer by a self assembled mono layer (SAM) of glutathione. Using DPASV a linear response of the signal was obtained as a function of As(III) in the concentration range 0.05–20mM (4– 1498 ppb) with a limit of detection of 0.01 mM (0.9 ppb). Sample stirring and degassing were not needed. Applica- tion to the determination of arsenic(III) and (V) in un- derground water samples from Burkina Faso was success- fully achieved.Contribution Ă  l'amĂ©lioration de l'accĂšs Ă  une eau potable de qualitĂ© pour les populations de la rĂ©gion du nord du Burkina Fas

    C32 DĂ©veloppement d’un procĂ©dĂ© de production et de stĂ©rilisation de liposomes en une seule Ă©tape en utilisant le dioxyde de carbone supercritique

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    Introduction : les liposomes sont des vecteurs ciblĂ©s de mĂ©dicaments prĂ©sentant aujourd’hui un grand intĂ©rĂȘt pharmaceutique et thĂ©rapeutique et gĂ©nĂ©ralement administrĂ©s par voie parentĂ©rale. Cependant, leur fabrication industrielle ainsi que leur stĂ©rilisation demeurent un dĂ©fi. Le dioxyde de carbone supercritique (CO2Sc) constitue aujourd’hui une mĂ©thode alternative de production des liposomes et prĂ©sente Ă©galement des propriĂ©tĂ©s stĂ©rilisantes. Le but de ce travail est de dĂ©velopper un procĂ©dĂ© innovant de production et de stĂ©rilisation des liposomes en une seule Ă©tape en utilisant le ScCO2. MĂ©thodologie : la capacitĂ© de 4 conditions ScCO2 Ă  atteindre le niveau d’assurance de stĂ©rilitĂ© (SAL) de 10-6 exigĂ© pour des liposomes a d’abord Ă©tĂ© Ă©valuĂ©e en utilisant les spores de Bacillus Atropheus comme indicateur microbiologique de rĂ©fĂ©rence, en vue de sĂ©lectionner des conditions opĂ©ratoires de procĂ©dĂ© : C1 (70° C/150 bar/240 min), C1A (80° C/240 bar/30 min), C1B (80° C/150 bar/60 min), C1C (80° C/240 bar/60 min). Les conditions sĂ©lectionnĂ©es ont ensuite Ă©tĂ© utilisĂ©es pour la production de deux formulations de liposomes : F1 (HEPC/DC-CHOL/CHOL/DSPE-PEG2000 50,05/29,40/0,60/19,95 % m/m) et F2 (HSPC/CHOL/DSPE-PEG2000 65/30/5 % m/m). Les liposomes obtenus ont enfin fait l’objet d’une caractĂ©risation physicochimique et microbiologique.   RĂ©sultats : les rĂ©sultats ont montrĂ© l’atteinte du SAL requis pour les liposomes avec les conditions C1, C1B et C1C, lesquelles ont Ă©tĂ© utilisĂ©es pour les essais de production/stĂ©rilisation des deux formulations. Concernant les liposomes rĂ©sultants, les rĂ©sultats ont montrĂ© l’atteinte du SAL requis avec les 2 formulations pour toutes les 3 conditions. Par ailleurs des liposomes de caractĂ©ristiques appropriĂ©es pour une administration parentĂ©rale (taille <200 nm, PdI ≀ 0,3) ont Ă©tĂ© obtenus avec la formulation F2 pour toutes les 3 conditions. Conclusion : Le ScCO2 pourrait ĂȘtre utilisĂ© pour la production et la stĂ©rilisation de liposomes dans un procĂ©dĂ© en une seule Ă©tape
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