Дисертації з теми "L'avis de produits"
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Nøjgaard, Mikkel. "Cultures of consumer information." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILD004.
Повний текст джерелаThis thesis is about the collectives that produce the functionality-related information consumers consult whenever they are considering what products to buy. I call these collectives cultures of consumer information. Cultures of consumer information warrant attention for two reasons. First, as the popularity of online consumer reviews suggests, consumers crave the ‘facts’ about the functionality of products before making a purchase, even if some consumer researchers have argued that functionality and facts only play a limited role in purchasing decisions. And second, cultures of consumer information call for attention because understanding the cultural patterns in how consumer information is produced can help us explain why different types of information, such as expert reviews and online user reviews, often offer contrasting characterizations of products. Uncovering the cultural factors that make different types of reviews diverge can help consumers to make better decisions, companies to better respond to consumer information, and policymakers to better manage the current consumer information environment
Denne afhandling omhandler de sociale systemer som producerer den funktionalitets-relaterede information som forbrugere benytter sig af, når de overvejer, hvilke produkter de vil købe. Jeg kalderdisse systemer forbrugerinformationskulturer. Forbrugerinformationskulturer fortjener opmærksomhed af to årsager. For det første, som populariteten af online brugeranmeldelser antyder, higer forbrugere efter fakta der beskriver funktionaliteten af produkter, inden de køber dem, omend nogle forbrugerforskere har argumenteret for, at funktionalitet og fakta spiller en begrænset rolle i købsbeslutninger. For det andet påkalder forbrugerinformationskulturer sig opmærksomhed, fordi viden om de kulturelle mønstre der kendetegner produktionen af forbrugerinformation kan hjælpe os med at forklare,hvorfor forskellige typer information – såsom ekspert-produktanmeldelser og online brugeranmeldelser – ofte kontraster i deres måde at karakterisere produkter på. Afdækningen af de kulturellefaktorer der forårsager disse kontraster kan hjælpe forbrugere med at træffe bedre beslutninger, virksomheder med at reagere bedre på forbrugerinformation, og politiske beslutningstagere med bedre atstyre det nuværende forbrugerinformationsmiljø
Techasena, Onrawee. "Modélisation du séchage à l'air chaud de produits alimentaires granuleux." Châtenay-Malabry, Ecole centrale de Paris, 1989. http://www.theses.fr/1989ECAP0107.
Повний текст джерелаAngulo, Shadia. "Emissions of terpenes from the use of essential-oil-based household products under realisatic condition : impact on indoor air quality." Thesis, Ecole nationale supérieure Mines-Télécom Lille Douai, 2019. http://www.theses.fr/2019MTLD0023.
Повний текст джерелаEssential oils, as natural fragances, are frequently used in green marketed housecleaning products and air fresheners. Nonetheless, they contain volatile and reactive chemical species. This thesis investigates the emissions of essential-oil-based household products under real consumer use patterns to assess their impacts on indoor air quality. The experimental approach allows an integrated assessment of the estimation of the terpene emissions from 10 selected essential-oil-based household products in experimental chambers at different scales ; from micro-chamber to the 40m3 experimental room. Regarding essential-oil-based cleaning products, contrasted concentration levels are evidenced for terpenes species related to the application process and use purpose of these products. Morover, long-term increase of formaldehyde concentrations are noticed after the application of these products that might be related to secondary sources. Concerning the indoor diffusion of tea tree oil, contrasted concentration levels and kinetics are evidenced depending on the mechanism of diffusion used. Concentrations can exceed by more than one order of magnitude the recommanded Critical Exposure Level (CEL). It is noticed that the relative contribtions of individual terpenes is the gas phase vary all along the diffusion process, for any investigated diffusion device. Finally, essential-oil-based household products have to be seriously envisaged as versatile anfdsignificant sources of VOCs since they might induce indoor concentrations of terpenes exceeding exposure limits established by the European Union and the United States
Balvet, Delphine Martin Jean-Baptiste. "La consommation de productions locales en Bresse de l'Ain pratiques et représentations alimentaires /." Lyon : Université Lumière Lyon 2, 2002. http://theses.univ-lyon2.fr/sdx/theses/lyon2/2002/balvet_d.
Повний текст джерелаHADDAD, JEAN. "Apport de l'ami 25 a l'irm hepatique : resultats preliminaires." Toulouse 3, 1992. http://www.theses.fr/1992TOU31556.
Повний текст джерелаZheng, Wuyin. "Développement d'un analyseur rapide et transportable du formaldéhyde dans l'air." Strasbourg, 2010. http://www.theses.fr/2010STRA6282.
Повний текст джерелаFormaldehyde is a major pollutant of indoor air where its sources are multiple (materials, combustion, etc. ). The objective of this work is to develop a selective and portable analyzer for gaseous formaldehyde, with a time resolution of a few minutes, a detection limit lower than 1 μg. M-3 and a relatively low cost to purchase and then for its operation. The principle of our analyzer is based on a chemical method of detecting the concentration of formaldehyde gas, previously taken up into a solution to form a fluorescent species (DDL) by reaction of formaldehyde with fluoral-P, a selective agent derivative. The analyzer measures concentrations of formaldehyde in 3 steps strongly coupled to each other : 1) the uptake of gaseous formaldehyde into an aqueous solution ; 2) the selective derivatization of formaldehyde by reaction with fluoral-P ; 3) the analysis of the reaction product by fluorescence spectroscopy. A patent relating to the analytical method developed in this work was submitted in june 2009 and published in december 2010. From our manual system, a first automatic prototype was achieved. The various experiments performed with this prototype have shown that our analyzer can highlight some fine temporal variations of formaldehyde concentrations in indoor or outdoor atmospheres. It actually responds to the specifications originally planned, and even allows to measure formaldehyde levels 25 times lower (0,04 μg. M-3) than the limit of detection of 1 μg. M-3 initially expected
Nicolas, Mélanie. "Ozone et qualité de l'air intérieur : interactions avec les produits de construction et de décoration." Phd thesis, Université Paris-Diderot - Paris VII, 2006. http://tel.archives-ouvertes.fr/tel-00134593.
Повний текст джерелаUn banc d'exposition contrôlée a été mis au point pour étudier les interactions entre l'ozone et seize produits de construction et de décoration fréquemment rencontrés dans les environnements intérieurs. Pour tous les matériaux testés, une disparition d'ozone significative, comprise entre 8% pour une peinture glycérophtalique et 89% pour un lambris en pin brut, a été observée. Des vitesses apparentes de dépôt de l'ozone sur les matériaux variant de 0,003 à 0,158 cm•s-1 ont été calculées. Les émissions des matériaux sont modifiées en présence d'ozone. Certains composés sont détectés en concentrations inférieures (styrène, alcènes C12) tandis que d'autres sont retrouvés en concentrations nettement supérieures, notamment des aldéhydes (formaldéhyde, acétaldéhyde, benzaldéhyde, C5 à C10), des cétones et des acides carboxyliques. Lors d'essais conduits sur un lambris en pin, la prédominance des mécanismes hétérogènes dans la disparition d'ozone a été mise en évidence, la contribution des réactions en phase homogène étant estimée entre 5 et 20 %.
L'impact de la pollution photochimique sur la qualité de l'air intérieur a été étudié durant les étés 2003 et 2004 dans la maison expérimentale MARIA du CSTB. Il apparaît que la pollution extérieure (NO, NO2 et O3) est complètement transférée dans la pièce par le système de ventilation. Près de 80% à 95% de l'ozone est éliminé à l'intérieur de la pièce, témoignant ainsi de la présence d'importants puits d'ozone. Des sous-produits réactionnels ont été identifiés, en particulier le formaldéhyde, l'hexaldéhyde, le benzaldéhyde et le nonanal. Il apparaît que la réactivité en phase hétérogène prédomine sur les réactions en phase gazeuse, bien que des réactions d'ozonolyse d'alpha-pinène aient été observées dans la pièce. Les variations quotidiennes des concentrations intérieures de l'ozone et de certains composés (formaldéhyde, hexaldéhyde) soulignent le rôle de la réactivité chimique et des paramètres environnementaux (surtout la température) sur les émissions de certains matériaux, et donc sur leurs concentrations dans l'air intérieur.
Un modèle simple de prédiction des concentrations intérieures de polluants a été mis au point. Les prévisions sont réalisées d'après les concentrations extérieures des polluants et intègrent la réactivité en phase homogène et en phase hétérogène. Pour NO, les données simulées et réelles sont quasiment identiques tandis que le modèle surestime les concentrations intérieures de NO2, probablement du fait de l'absence de prise en compte du dépôt de NO2 sur les surfaces intérieures. Les prévisions des concentrations intérieures d'ozone sont très satisfaisantes.
GHISALBERTI, LAETITIA. "Vers une caracterisation rapide des echanges chaleur / matiere entre l'air et les produits alimentaires solides." Massy, ENSIA, 2000. http://www.theses.fr/2000EIAA0102.
Повний текст джерелаVincent, Guillaume. "Procédé d'élimination de la pollution de l'air par traitement photocatalytique : application aux COVs." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL037N/document.
Повний текст джерелаPhotocatalytic oxidation of airborne contaminants appears to be a promising process for remediation of air polluted by Volatile Organic Compounds (VOCs). The aim of our study is the photocatalytic oxidation of several VOCs using an annular reactor: methylethylketone (MEK), acetone, 1-propanol and triethylamine (TEA). First, the influence of different kinetic parameters such as pollutant concentration, incident light irradiance, contact time and humidity has been studied. A mechanistic pathway has been indeed proposed for each pollutant according to the produced intermediates species detected by GC/MS. Second, the diffusion of hydroxyls radicals OH• in gas phase, after photonic activation of TiO2, has been highlighted using Laser-Induced Fluorescence (LIF). For the first time, OH• radicals have been detected at atmospheric pressures, close to the major photocatalytic oxidation conditions, leading to the assumption that the photocatalytic degradation of VOCs might be at least partially occurs between pollutants and OH• radicals in gas-phase
Balvet, Delphine. "La consommation de productions locales en Bresse de l'Ain : pratiques et représentations alimentaires." Lyon 2, 2002. http://theses.univ-lyon2.fr/documents/lyon2/2002/balvet_d.
Повний текст джерелаThe present work takes part in a study concerning the consumption of local agricultural products and foodstuffs in a context of strong valorisation and fancy for these products in France. It proposes to better understand the status granted to this food by the "consumers-connoisseurs" taking the consumers from Bresse (Ain - Rhône-Alpes) as a Aradne's thread. This doctoral thesis tries to show how the attention of the consumer towards what he's eating is all the more sustained and the food all the more appreciable since the mental and physical proximity with the product and its production system is great. Therefore, the ethnographic approach underlines that consuming this sort of foodstuffs needs a certain number of knowledges and know-hows, in term of way of consumption and in cooking or product's identification. This knowledges give sense to the act of incorporation. It will deal with the practices and representation regarding these foodstuffs, by setting them within the whole local food system by favouring their dynamic aspects. The local production can be sometimes exteriorised: the processes of exhibition suppose some selection processes which create a gap between private food and public food, between "saying" and "doing". But in the Bresse area, those processes scarcely take the shape of heritage creation process
Delagrange, Sophie. "Plasma hors-équilibre et catalyseur : du laboratoire au prototype, étude de l'élimination du toluène dans l'air." Poitiers, 2005. http://www.theses.fr/2005POIT2259.
Повний текст джерелаIn the last past years, much attention has been paid to the outdoor pollution, but only recently the international scientific community worried about contamination of the indoor air. The existing air cleaning processes are not well suited for the indoor air treatment. The use of a "non-thermal" plasma could answer to this need. The main target of this thesis is then to study the toluene oxidation by a process associating plasma and catalysis. Toluene is a Volatile Organic Compound characteristic of the indoor pollution. The non-thermal plasma alone can destroy the pollutants, however it does not lead to a complete oxidation and it could generate unwanted species (O3, NOx). The study of the toluene chemical transformation by a process using the plasma with a series of catalysts has pointed out that the toluene adsorbed over the support (-Al2O3, AC) was oxidized by reaction with the oxidizing species generated by the plasma, showing then the essential role played by the catalytic support. This phenomenon adds further to the direct toluene elimination by the plasma. The presence of an active phase such nanosized gold particles over the catalytic support allows, besides the CO oxidation into CO2, the ozone removal and the increase in toluene destruction. The system associating plasma and catalyst turns out to be very effective. This study at laboratory scale has been scaled up at real scale with the view to develop a plasma catalytic system for an industrial application : indoor air cleaning of a vehicle cabin. This work was carried out within the European program CLEANRCAB
TOURNIAIRE, JEAN. "Application de l'effet t1 de l'ami-25 au diagnostic des hemangiomes hepatiques : a propos de 6 observations." Lyon 1, 1993. http://www.theses.fr/1993LYO1M062.
Повний текст джерелаEUSTACHE, SYLVIE. "Mise au point d'un procede analytique : controle continu de la qualite de l'air medical produit par une centrale de compression et d'epuration de l'air atmospherique." Paris 7, 1994. http://www.theses.fr/1994PA077362.
Повний текст джерелаDagnelie, Romain. "Développement d'un capteur chimique de polluants atmosphériques à transduction optique et à la base de matériaux nanoporeux : application à la détection des composés carbonylés pour le contôle de la qualité de l'air." Paris 11, 2009. http://www.theses.fr/2009PA112311.
Повний текст джерелаDuring the last decade, the increase of the awareness of the importance of indoor air quality and its potential impact on human health has stimulated an interest in formaldehyde, a carcinogen for humans. Because of its numerous emission sources (plywood, isolation foam, adhesive resins, cosmetic, etc…), CH2O is a ubiquitous indoor pollutant whose concentrations can vary from a few ppb to more than 100 ppb in homes. Over this domain of concentration, a few methods are commercially available, such as gas chromatography combined with a methanation process or the Hantzsch method involving the bubbling of the contaminated air in a liquid reactant. However, those sensors have a few drawbacks in terms either of simplicity of the sampling, heavy maintenance or high cost and high cost of consumables. Therefore, the development of a low-cost, fast and sensitive sensor which can detect a wide range of concentration of formaldehyde is an important and significant challenge. The present thesis work was achieved in the “Chemical Sensors” team of the Francis Perrin Laboratory (LFP), a unit of the Atomic Energy Commission (CEA) associated with the National Centre of Scientific Research (CNRS). Various strategies were developed to obtain very sensitive and selective sensors. With nanoporous SiO2 thin layers deposited on quartz substrate, acting as a sponge to trap the pollutants and whose pore size distribution can be tailored to filter the pollutants by their size, a first selectivity can be obtained. These nanoporous materials were synthesized with tetramethoxysilane precursors (TMOS) using the Sol-Gel process. With the use of 4-amino-3-pentene-2-one (Fluoral-P), which absorbs in the UV and which reacts selectively with formaldehyde, a product, the 3,5-diacetyl-1,4-dihydrolutidine (DDL) is obtained which absorbs and fluoresces over the visible region. By collecting the DDL fluorescence, it is possible to detect CH2O over a wide range of concentrations, from 400 ppt to 200 ppb. A home-made prototype was developed which comprises four units: the light source composed of a light emitting diode (LED, 410 nm) with its power supply, a flow cell unit equipped with a micro-pump, a detection unit equipped with a miniaturized spectrometer from Ocean Optics and a computer to drive the experiments. The prototype response was studied as functions of the formaldehyde concentration, under various conditions of flow rate, exposure duration, temperature (5-50 °C) and relative humidity (0-70 %) and the calibration curves were established. With a pulsed-mode detection implying 2 to 3 minutes of exposure of the sensor to the pollutant, 40 measurements can be collected with a single sensitive layer. As water vapor was found to be the major interference in the formaldehyde detection, we have explored three main routes to reduce or suppress the effect of humidity: i) the replacement of Fluoral-P by a more hydrophobic derivative, the 4-Amino-4-phenylbut-3-en-2-one, ii) the potentiality of various hydrophobic porous xerogel monoliths and thin films to be water-repellent and iii) the addition of a drying unit. Few methylated (Methyltrimethoxysilane) and fluorinated (3,3,3-Trifluoropropyltrimethoxysilane) alcoxide co-precursors were combined in various proportions with TMOS to give materials with different hydrophobicity properties. We have shown via contact angle measurements and thermo-gravimetric analyses that fluorinated xerogel monoliths and thin films display the most hydrophobic character since the water droplets does not diffuse into the matrix. However, their permeability to water vapor is totally different. To scale the permeability of porous material to water vapor, we proposed a new and original method based on the quantitative measurement of the lifetime of a probe molecule, Fluoral-P, trapped in the matrix and which is hydrolyzed in humidified atmosphere. With this method, we not only demonstrated that the fluorinated xerogels, repellent to liquid water, still display permeability to water vapour, but also could quantify the efficiency of those materials to slow down the water vapor diffusion. Finally, the addition of a drying CaCl2 unit to trap water vapor allows the use of the sensor over the entire domain of humidity up to 100 %. During this work, we have participated to two campaigns of measurements of formaldehyde. The first one taking place in the south suburb of Paris involved four laboratories and the measurement of outdoor pollutants, with formaldehyde content as low as 400 ppt to few ppb and high humidity (60 %). The second one, organized by the Institute of National Institute of Environment and Industrial Risks was dedicated to the inter-comparison of both commercial apparatus and methods under development in laboratories. Moreover, a collaboration has been established with the CEA-LETI of Grenoble for the fabrication of an industrial prototype, INDIGO, whose performances are under investigation
Mouvondo, Epiphane. "La logistique de l'aval pétrolier dans les pays de la CEMAC : révélateur et facteur de disparités socio-spatiales d'accès aux produits pétroliers." Thesis, Nantes, 2018. http://www.theses.fr/2018NANT2014/document.
Повний текст джерелаThe Central African Economic and Monetary Community (CE MAC) in the Central African subregion has a very significant potential of oil resources. Those resources are central to the global geopolitics as well as the regional economic development issues. Although the economy of the six oil-producing states of the CEMAC is based on oil exploitation, the recurring shortages of petroleum products in those countries cause problems in accessing modern energies (gas, butane and fuel). But beyond those shortages, short-term fluctuations, the socio-spatial disparities in access to petroleum products are the focus of this PhD thesis. This situation which seems paradoxical at first sight for countries endowed with an energy potential though, is a real obstacle to development in particular in the transport and industry sector. The difficulties to access modern energies constrain households in particular those in rural areas, to use the biomass in a traditional way (firewood and animal waste) at the expense of the environment preservation or even at the expense of their health. This thesis aims therefore to diagnose the factors which hinder the universal access (on social and spatial level) to petroleum products and its consequences on the environment. Furthermore, the strategies developed by the actors are also highlighted. We propose some ideas to improve the supply and distribution system of petroleum products in the CEMAC countries
Moudakkir, Salah. "Etude physico-chimique de l'oxyde d'étain SnO2. Aptitude à la réalisation d'un capteur passif sensible aux traces de gaz réducteurs dans l'air." Tours, 1998. http://www.theses.fr/1998TOUR4016.
Повний текст джерелаKARABAGHLI, DEGRON CHAFIKA. "Role de l'aia produit par laccaria bicolor s238 n sur la rhizogenese de semis d'epicea. Application a l'enracinement de boutures d'epicea et de douglas." Paris, ENGREF, 1997. http://www.theses.fr/1997ENGR0042.
Повний текст джерелаFathallah, Houssem Eddine. "Conception d'un système temps-réel de surveillance de l'exposition aux polluants de l'air intérieur : application au formaldéhyde." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0100.
Повний текст джерелаFormaldehyde is classified as a "high priority" pollutant in the indoor air quality. Because of its health effects, the emerging French regulation (Action 7 of PNSE2) requires the measurement of formaldehyde in public places (schools, kindergartens etc.) from 2017. However, no device on the market is able to provide accurate measurements in real time and at low cost. This thesis forms part of the ANR project CAPFEIN (réseau de CAPteurs de FormaldEhyde intelligents pour la surveillance de l'air Intérieur) whose purpose is to develop a "smart Formaldehyde sensor". The thesis objective is to design a real-time monitoring system of human exposure to formaldehyde, and more generally to indoor air pollutant. The sensors must be equipped with a communication interface to automatically collect measurements at different points of the environment to be monitored. Two monitoring systems have been developed. The first is Designed with commercial off-the-shelf component and a centralized architecture based on the concept of the Internet of Things (IoT). The second was designed from the CRAN and corresponds to the development of a solution based on a distributed approach. A smart badge has been developed. It can monitor exposure levels to each cardholder. The major constraints of this work consist on the ability to locate people in an indoor environment and the ability to optimize the algorithms in terms of memory space and power consumption. For the optimization part, the moving average exponential weighting methods have been implemented and evaluated. Both prototypes were tested in buildings of CRAN and showed interest
Lochon, Frédéric. "Développement de microcapteurs chimiques à base de micropoutres dédiés au contrôle de la qualité de l'air : détection temps réel de Composés Organiques Volatils (COV)." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2007. http://tel.archives-ouvertes.fr/tel-00399419.
Повний текст джерелаHamdi, Khaoula. "Détection spectrophotométrique en temps réel d'hydrocarbures monoaromatiques (benzène, toluène et xylènes) dans l'air aux valeurs limites d'exposition professionnelle." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0328/document.
Повний текст джерелаThe objective of this thesis was to develop a spectrophotometric sensor to quantify benzene, toluene and xylenes (BTX) in real time at the level of the occupational exposure limit values, ie 20 ppmv for toluene, 50 Ppmv for xylenes and 1 ppmv for benzene. The study was carried out with several sensitive layers, a solid silicic material synthesized by the sol-gel process or thin films (less than 5 μm) deposited on quartz by dip-coating a suspension of nanoparticles or a precursor solution leading to mesoporous silica thin films. We were able to demonstrate the effectiveness of BTX detection in real time. The use of continuous mesoporous films has enabled a correct repeatability of the sensor (standard deviation <10%). Nevertheless, neither these silica films nor their functionalization by methyl groups have solved the problem posed by moisture. Only the use of a dryer that we implemented in the measuring device allowed the detection of toluene in the presence of ambient humidity. In this configuration, interference of 40 ppmv of butanone, acetone and ethanol was also eliminated. Finally, the design of a multi-plate cell allowed to reach detection limits of 1 ppmv at 267 nm for toluene, 1 ppmv at 274 nm for p-xylene and 5 ppmv at 252 nm for benzene. Finally, this limit of detection can be lowered to 1 ppmv at 190 nm for benzene
Girault, Marie. "Etude d'un plasma généré lors d'un traitement de surface métallique par ablation laser dans l'air : caractérisations du rayonnement et des nanoparticules induits." Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS028/document.
Повний текст джерелаThe interaction of a laser beam of short pulse duration with metallic materials such as aluminum, iron or titanium is characterized by the presence of a high energy and strongly ionized plume (plasma). The aim of this study is to understand the mechanisms involved in plasma, created when laser-target interaction, which lead to the formation of nanoparticles. We would generally consider the dynamic expansion in the air of the plasma plume formed with a nanosecond Nd:YAG laser to specify the conditions of formation of these particles and their morphological and structural characteristics. Thus, this work is divided onto two parts. In the first part, we present the experimental characterization of the expansion of the plume in the air. The radiation induced by plasma allows to extracting the plasma characteristics. Two complementary methods were used: atomic spectrometry which allows to doing a physical analysis of plasma and spectral fast imagery to obtain a morphological analysis. The second part is devoted to the characterization of particles formed in the same operating conditions. In order to analyzing the particles as close to their formation environment, an analysis “in flight” of particle size distribution is implemented by EEPS granulometry. This experiment is preparatory at an analysis by in-situ Small-Angle X-ray Scattering (S.A.X.S.) under a controlled atmosphere, which allows to studying the influence of oxygen on the size and the morphology of the particles
Wongkaew, Thitirat. "Les interrelations entre les "trois organisations soeurs" et les mesures sanitaires et phytosanitaires de l'ASEAN : quel avenir pour la dignité humaine ? Réflexions dans la perspective de la "New Haven School of International Law"." Thesis, Paris 2, 2015. http://www.theses.fr/2015PA020094.
Повний текст джерелаThe « three sisters », namely the Codex Alimentarius Commission (CAC), the World Organisation for Animal Health (OIE) and the International Plant Protection Convention (IPPC), and SPS measures of ASEAN maintain a mutually close relationship and can interact with one another in complex and multidimensional ways, which can affect flows of import and export activities of agro-food products regulated especially by international economic law. By perceiving law as a process of decisions, and particularly international law as a process of communication among different participants of the « world community », these interactions can be better identified and comprehended at all levels : multilateral, regional, bilateral and national. Considering the intensity and frequency of exchanges and the strong interdependency of today’s world, the « three sisters » and their standards, guidelines and recommendations are likely to play numerous roles in promoting a greater production and wider distribution of fundamental values that all human beings desire to maximize and achieve, as defended by the « New Haven School of International Law ». Not only are these roles related to the promotion of a more efficient process of eliminating trade barriers deriving from SPS protectionist measures, but also those which are insufficiently highlighted, yet becoming more obvious through repeated practices of ASEAN decision-makers. These are notably the roles of the « three sisters » as performance drivers for monitoring mechanisms of SPS measures with a view to ensuring that they are reasonable in each specific context and respectful towards human dignity; as catalysts of open regionalism ; as promoters of the development dimension in regional trade agreements concluded by ASEAN