Dissertations / Theses on the topic 'Sorcier'
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Rossazza, Jean-Paul. "Utilisation de hiérarchies de classes floues pour la représentation de connaissances imprécises et sujettes à exceptions : le système "SORCIER"." Toulouse 3, 1990. http://www.theses.fr/1990TOU30106.
Full textMavinga, Lake Lukau. "De l'enfant sorcier à l'enfant martyr : anthropologie psychanalytique des figures du n'doki et du nganga dans la société bakongo." Paris 7, 2010. http://www.theses.fr/2010PA070098.
Full textThrough our research and clinical work we observed two phenomena concerning of pain treatment, among the Central African bakongo populations. The first one is the symptom insistance (and its "truth"), that causes the bakongos no longer to believe in the traditional power of the nganga (healer magician) but to prefer now to turn to prayer, the priest or the pastor, in a kind of "call to the father" made as part of the movement Christianization of this society. The second observable phenomenon is the child being cast in the role of ndoki (evil power wizard). What should be notced in these African societies is an invented guilt structure where it is the child who bears the family guilt. This African child "cause" of the family misfortune thus becomes the origin of its redemption. In these studies, our work consisted of an attempt to show how the ndoki child (evil power wizard) is transformed into the child martyr, in these African societies
Bouaka, Charles-Lucien. "Le missionnaire a l'epoque coloniale. Dramatis persona chez mongo beti et rene philombe. Lecture multiple des proses romanesques : le pauvre christ de bomba, le roi miracule et un sorcier blanc a zangali." Paris 3, 1990. http://www.theses.fr/1991PA030001.
Full textThe missionary at the colonial time is depicted negatively in our corpus. The personage, who has the onus of going to teach the message of the begotten of god to the black people of africa, could he find the suitable conditionsnfor conducting an independant and unselfish action without to compromise himself? our research work shows still more that the personage acted not only for the church but also for his country, contrarily to the pontifical directives. Nevertheless, the colonial system which leans on high-handed actions organizes the enslavement and the exploitation of the colonized people. At the same, he denies his cultural and philosphical patrimony. In this social and historical context, the imbrication of the religious and the political matter, or in the better, the collusion between the missionary clergy and the administration offera to mongo beti and rene philombe arguments to (sharphy) denry the unselfish claims of the apostolate
Camus, Dominique. "Sorciers et jeteurs de sorts en Haute-Bretagne." Paris, EHESS, 1986. http://www.theses.fr/1986EHESA003.
Full textTaric, Zumsteg Fabienne. "Les sorciers à l'assaut du village Gollion : (1615 - 1631) /." Lausanne : Éd. du Zèbre, 2000. http://www.gbv.de/dms/spk/sbb/recht/toc/321881273.pdf.
Full textKokoli, Alexandra Marianthi. "'Pourquoi sorcières?' : second-wave feminism and the uncanny." Thesis, University of Sussex, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398758.
Full textCeldran-Johannessen, Hélène. "Prophètes, sorciers, rumeurs : la violence dans trois romans de Barbey d'Aurevilly /." Oslo : Faculty of arts, University of Oslo : Unipub, 2003. http://catalogue.bnf.fr/ark:/12148/cb39203859j.
Full textCárdenas, Youngs Gina Mabel. "Sorción de quinolonas en suelos agrícolas." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/665150.
Full textThis work deals with studies of sorption of a group of fluoroquinolones (Danofloxacine, Difloxacine, Enrofloxacine, Marbofloxacine, Sarafloxacine) into agricultural soils through obtaining sorption isotherms. From the fit of the experimental data to the models of Freundlich and Langmuir, and obtaining the sorption coefficients from these, it has been possible to explain the sorption behavior of these after the application of chemometric tools as Principal Component Analysis. From here, it was concluded that the characteristics of the studied soils that have the most influence on the sorption behavior of these drugs are the pH, the content of organic matter, the cation exchange capacity, and the silt content, while the one that exerts less influence is the sand content. Another chemometric tool used has been the Partial Least Squares Regression (by using the PLS Toolbox under Matlab), from which we have obtained prediction models of the sorption with prediction errors below 0.2 units of logKd for a concentration of 0.1 mg L-1. Also, we carry out sorption studies in soil-biochar mixtures, from which it is possible to point out that sandy soils with characteristics like those studied, are good candidates to be amended and thus obtain an improvement in their sorption capacities. On the other hand, the octanol-water partition coefficients and the acid dissociation constants for each of the fluoroquinolones were measured. This allowed us to establish the speciation of each fluoroquinolone studied and its lipophilicity, which was very useful to infer the sorption mechanisms of the fluoroquinolones involved in the studies.
Abatescianni, Marco Lorenzo. "Sorcery and Spiritual Hegemony in Africa." Thesis, Högskolan Dalarna, Institutionen för kultur och samhälle, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:du-37785.
Full textRaghunath, Chaitra. "Service ORiented Computing EnviRonment (SORCER) for Deterministic Global and Stochastic Optimization." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/75292.
Full textMaster of Science
Ostorero, Martine. ""Folâtrer avec les démons" : sabbat et chasse aux sorciers à Vevey (1448) /." Lausanne : Université de Lausanne, 2008. http://catalogue.bnf.fr/ark:/12148/cb41422815f.
Full textGarra, Simone. "Les sorciers condamnés : chamanisme et mutation dans le monde awajún (Amazonas, Pérou)." Thesis, Paris 10, 2017. http://www.theses.fr/2017PA100155.
Full textSince the 1960s we have witnessed an internal process of marginalization of shamans (iwishin) as a consequence of a reorganization of the Awajun people due to the presence of missionaries’ schools and the foundation of native communities (comunidades nativas). Since the presence of the iwishin has created intra and intercommunal conflicts, most of them are killed or forced to leave their communities. Nevertheless, accusations of witchcraft in the villages persist. Political rivalry, competition for economic resources, inequality caused by trade, and factional hostility stirred up by the various religious orders all add to the tensions caused by the violation of marriage laws. These conflicts often lead neighbors to accuse each other of witchcraft. In fact, only the permanent banishment of the supposed shaman can ease the internal tension in the community at least temporarily. The city seems to be the only refuge for the “condemned witches”. For this reason, Santa Maria de Nieva, the capital of the province of Condorcanqui, has been progressively “invaded” by tens of Awajuns who can no longer live in their communities. On the other hand, the constant interaction between native
Rivera, Alexandra. "Conjurer la Révolution : Sorciers, Païens et Justice Sociale dans la France contemporaine." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/scripps_theses/1376.
Full textBellamy, I. Larry A. II. "Witchcraft, Sorcery, Academic and Local Change in East Africa." Miami University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=miami1083875240.
Full textAithala, Karkada Nagesha. "A Collaborative Computational Framework for Multidisciplinary and Reliability-based Analysis and Optimization Using SORCER." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1316463759.
Full textMaguire, Jennifer Mary. "Write in the middle : a study of Jean Bodin's De la Démonomanie des sorciers (1580)." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695662.
Full textTimtcheva, Viara. "L'image du magicien dans les contes méditerranéens et slaves." Bordeaux 3, 2008. http://www.theses.fr/2008BOR30093.
Full textThe fairy tale, underrated for a long time, has been rehabilitated by researchers and is now considered to be an expression of the collective unconscious, or at the very least, a source of profound wisdom. Good or evil magicians, although they are seldom protagonists, are undoubtedly key figures. First I deal with the place of magic and magicians in ancient Greek and Roman systems of belief, among the ancient Slavonic and Arab tribes, and in the three monotheistic religions, Judaism, Christianity, and Islam. Then I analyse the figure of the magician (physical portrait, social position, character, knowledge, function) in a corpus of more than 200 fairy tales from 25 different countries. Finally, I focus on the magician as archetype and universal symbol seen from both the literary and the psychological angles. I examine the correlations between magicians in fairy tales, the keys-concepts of magic, and the roots of this mysterious and immortal figure. Beyond the religious and cultural differences, the figure of the magician is seen as atemporel, from the point of view of what it has common with the whole of humanity. Although I have chosen to restrict my corpus to fairy tales, my analysis has a broader objective and scope. I attempt to outline the origins of the figure, to show how it has changed and to understand its significance. My study is at the crossroads of Literature, Ethnography, Religion, Sociology, and Psychology
Reese, Amy. "Interesting Item." Diss., North Dakota State University, 2001. https://hdl.handle.net/10365/31493.
Full textSilva, Vernes Isabel Cristina da. "Emergence de l'archétype de la sorcière chez Machado de Assis." Limoges, 2006. http://www.theses.fr/2006LIMO2017.
Full textDwyer, Graham. "Supernatural affliction and its treatment : aspects of popular religion in rural and urban Rajasthan." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338974.
Full textSavage, R. W. H. "Structure and sorcery : The aesthetics of post-war serial composition and indeterminacy." Thesis, University of Sussex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377937.
Full textTeixidó, i. Planes Marc. "Agents antimicrobians en el sistema sòl-aigua: estudis de sorció." Doctoral thesis, Universitat de Barcelona, 2013. http://hdl.handle.net/10803/123744.
Full textAntimicrobials have long been extensively used to treat infectious disease and promote growth in livestock. Up to 90% of administered sulfonamide drugs can be excreted as the active parent compound and large amounts of sulfonamide residues are released to the environment via land application of contaminated manure. At field concentrations, antimicrobials affect soil microbial community and promote the development of antimicrobial resistance in bacteria. Soil sorption processes dominate transport, fate and possible effects of these chemicals in the environment. Further understanding of mechanisms involved in antimicrobial sorption can definitely help to retard their leaching and run-off to waters. In our studies we have focused on two widely used antimicrobials presenting different environmental mobility: tetracyclines (mostly retained) and sulfonamides (highly mobile). We have determined the sorption coefficients (Kd) of a group of TCs (tetracycline, oxytetracycline, chlortetracycline and doxycycline) in 15 natural soils with different physicochemical properties. The use of multivariate data analyses allowed to elucidate sorption mechanisms involved and to assess the environmental mobility as well. On the other hand, if sulfonamides cannot be prevented from entering soil, we consider of great interest to find means to minimize its transport into ground water and surface waters. Since Biochars is reputed to be a strong adsorbent, we studied the adsorption of the heavily used swine antimicrobial sulfamethazine, to a range of biochars and biochar-amended mixtures to test whether it could reduce pore water concentrations –potentially decreasing sulfamethazine bioavailability– and to provide insights into SMT adsorption. Results showed that depending on biochar physicochemical properties (surface area, surface functional groups, C/H ratio, etc), it could be a potential effective adsorbent for sulfamethazine and decrease its mobility in biochar-amended soils. We have also observed that sulfamethazine retention, significantly decreases with the time of residence of the biochar in soil. This latter phenomenon, commonly known as the “weathering effect”, has been attributed to sorption of native soil substances, such as humic substances. This work has also developed a novel tool (ISOT_Calc/Ref_GN_LM, developed as function and macro for MS-Excel, respectively). The combination of ISOT_Calc/Ref_GN_LM can be used in the evaluation of the isotherm parameters from batch experimental sorption data.
Lakade, Sameer Shamrao. "Evaluation of Novel Sorptive Extraction Techniques." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/458368.
Full textEl objetivo de esta Tesis Doctoral es la evaluación de las nuevas técnicas de extracción por sorción, fabric phase sorptive extraction (FPSE), FPSE en modo dinámico, capsule phase microextraction (CPME) y la extracción dispersiva en fase sólida (d-SPE) utilizando partículas magnéticas de propiedades hypercrosslinked para la extracción de diferentes contaminantes orgánicos emergentes de un amplio rango de polaridad en aguas de procedencia medioambiental. En la primera sección, FPSE con dos modos de extracción diferentes, estático y dinámico, fueron evaluados para la extracción de un grupo de productos farmacéuticos y de cuidado personal. En la segunda sección, se evaluó una técnica de CPME recientemente introducida para el grupo de productos de cuidado personal; Y, en la última sección, las partículas magnéticas con propiedades hypercrosslinked se emplearon para la extracción de edulcorantes usando la técnica d-SPE. En todos los métodos desarrollados se utilizó la cromatografía líquida seguida de la espectrometría de masas en tándem (LC-MS/MS) para la determinación de los contaminantes. A partir de la evaluación de estas técnicas se ha demostrado que son técnicas de extracción alternativas la cual cosa nos anima a probarlas para diferentes tipos de analitos en otros tipos de muestras.
The objective of this Doctoral Thesis is the evaluation of the novel sorptive extraction techniques, such as fabric phase sorptive extraction (FPSE), dynamic FPSE, (CPME) and dispersive solid-phase extraction (d-SPE) using hypercrosslinked magnetic particles (MPs) for the extraction of different emerging organic contaminants of a wide range of polarity from environmental water samples. In the first section, FPSE with two different extraction modes, static and dynamic, were evaluated to extract a group of pharmaceuticals and personal care products. In the second section, a recently introduced CPME technique was evaluated for a group of personal care products; and, in last section, MPs with hypercrosslinked properties were employed for the extraction of sweeteners using d-SPE technique. In all methods developed liquid chromatography followed by tandem mass spectrometry (LC-MS/MS) was used for the determination of the contaminants. The evaluation of these techniques showed that they are alternative extraction techniques and encourage us to test them for different types of analytes in different kind of samples.
Camargo, Pamella Louise. "Romantismo, Paganismo e Bruxaria: a obra La Sorcière de Jules Michelet como precursora da Wicca, a Bruxaria Moderna." Universidade Estadual de Ponta Grossa, 2017. http://tede2.uepg.br/jspui/handle/prefix/2404.
Full textMade available in DSpace on 2017-11-28T10:40:53Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Pamella Louise Camargo.pdf: 1295109 bytes, checksum: 1778739a61b2071632922d74a8bd07ed (MD5) Previous issue date: 2017-02-16
A obra La Sorcière foi escrita em 1862 pelo historiador francês Jules Michelet e trata do tema da feitiçaria na Europa. A obra busca contemplar desde a criação da figura da feiticeira até a perseguição em massa promovida pela inquisição. Escrita em cerca de dois meses, em meio ao movimento romântico e em uma época de embates entre literatura e história, La Sorcière apresenta uma concepção romântica de concretude dos fenômenos mágicos e da bruxaria como crença de resistência popular ao clero e a nobreza. Pautada em uma estética literária próxima a do romance e com uma preocupação pedagógica; a obra acaba por ser precursora da noção de um culto organizado de bruxaria como rebeldia e “anti-religião”. Buscaremos demonstrar como a estética romântica e pedagógica de Michelet foi responsável pela ideia da bruxaria como permanência do paganismo europeu. Essa ideia de permanência e rebeldia auxiliou a moldar as modernas práticas de bruxaria e neopaganismo. Buscaremos, portanto, demonstrar que Michelet pode ser considerado, através de sua obra, um dos precursores da Wicca, a bruxaria moderna.Para tanto nos utilizaremos das teorias da Estética da Recepção de Jauss e a Teoria do Efeito Estético de Iser, dando ênfase a última.
The work La Sorcière was written in 1862 by the French historian Jules Michelet and deals with the theme of witchcraft in Europe. The work seeks to contemplate from the creation of the figure of the sorceress to a mass persecution promoted by the inquisition. Written in about two months, amid the romantic movement and in an era of interchange between literature and history, La Sorcière presents a romantic conception of the concretization of magical phenomena and witchcraft as a belief of popular resistance to the clergy and a nobility. Guided by a literary aesthetic close to the novel and with a pedagogical concern; The work turns out to be precursory of the notion of an organized cult of witchcraft like rebellion and "anti-religion". We will try to demonstrate how Michelet's romantic and pedagogical aesthetic was responsible for the idea of witchcraft as a permanence of European paganism. This idea of permanence and rebellion is responsible for practical practices of witchcraft and neopaganism. We will try, therefore, to demonstrate that Michelet can be considered, through his work, one of the forerunners of Wicca, a modern witchery. For this we will use the theories of the Aesthetics of the Reception of Jauss and the Theory of Esthetic Effect of Iser, emphasizing the last one.
Steele, Julia Anne Fisher Dominique D. "Colonial and postcolonial perspectives on racism Ourika and Moi, Tituba, sorcière... Noire de Salem /." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1335.
Full textTitle from electronic title page (viewed Apr. 25, 2008). "... in partial fulfillment of the requirements for the degree of Master of Arts in the Department of Romance Languages French." Discipline: Romance Languages; Department/School: Romance Languages.
Emery, Philip. "Revivifying the Ur-text : a reconstruction of sword-&-sorcery as a literary form." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/36307.
Full textNdoki, Massivi Juliana. "Etude des troubles d'étiologie sorcière punitive chez les Kongo : rôle thérapeuthique du procès traditionnel." Paris 8, 2010. http://octaviana.fr/document/169727238#?c=0&m=0&s=0&cv=0.
Full textFrom 2000 to 2004, the socioeducational institutions or French judicial send about fifteen of kongo families, whose one of the members is accused by a close to be sorcerer and the author of family disorders, to the Centre Georges Devereux at the university Paris8 for consultations. This Centre, who uses the procedures of ethnopsychiatry, is mandated to elucidate the accusation problem in witchcraft and to bring a psychological help to these families. In this thesis, I attempt to analyze certain of these clinical cases as well as other met on the African ground in the course of the traditional trial in punitive witchcraft so as to identify the therapeutic techniques of the ethnopsychiatry and of the approach of kongo traditional lawsuit in the resolution of the conflicts qualified of sorceress origin by the patients and their family. My hypothesis is that in witchcraft the lawsuit traditional is akin to device of care, that it has similarities and differences in relation to ethnopsychiatric device
GONZALEZ, ORTIZ ALAN 556031, and ORTIZ ALAN GONZALEZ. "Proceso de sorción de metronidazol y clindamicina con dos diferentes zeolitas modificadas con tensoactivos." Tesis de doctorado, Universidad Autonoma del Estado de México, 2019. http://hdl.handle.net/20.500.11799/104907.
Full textIn this work, the validation of the analytical method was carried out for the quantification of clindamycin and metronidazole in aqueous medium by High Resolution Liquid Chromatography (HPLC). The parameters, namely suitability, accuracy, linearity, limit of detection and quantification were determined. These parameters accomplished the national and international specifications. Two zeolitic materials were used, one from the State of Oaxaca (ZeO) and the other from the State of San Luis Potosí (ZeS); which were previously conditioned with a 0.1 M solution of sodium chloride (ZeONa and ZeSNa); both materials were modified with the cationic surfactants: hexadecyltrimethylammonium bromide (HDTMA), ZeOH and ZeSH materials were obtained and with the surfactant benzyl-dimethyl-hexadecyl ammonium chloride (BDHA) the ZeOB and ZeSB materials were generated. The effective cation exchange capacities were determined; it was found 0.94 and 0.49 meq/g for ZeO and ZeS respectively. In addition, the modified zeolitic materials (ZeOH, ZeSH, ZeOB and ZeSB) were characterized by infrared (IR) spectroscopy and the modification of the zeolites with the surfactants was evidenced with the bands at 2935-2919 cm-1 and 2869-2867 cm-1, which can be attributed to the CH2 groups present in the surfactant. Clinoptilolite, mordenite and muscovite were found in ZeO; while in ZeS the presence of clinoptilolite, quartz and mordenite were identified by X-ray diffraction, changes after being treated with HDTMA and BDHA were not observed. The sorption kinetics were carried out with metronidazole, the sorption systems with the four zeolitic materials modified with surfactants reached equilibrium at 15 h, the experimental data were adjusted to the Ho model. On the other hand, the sorption kinetics of clindamycin by the ZeOH and ZeSH materials presented equilibrium times of approximately 15 h; while the sorption systems using ZeOB and ZeSB reached equilibrium at 12 h. The experimental data were adjusted to the pseudo-second order model. The sorption isotherms of metronidazole and clindamycin were determined at three different temperatures (293, 303 and 313 K) with the four zeolitic materials (ZeOH, ZeSH, ZeOB and ZeSB), a linear behavior was observed. The thermodynamic behavior in the sorption of both drugs was exothermic and not spontaneous. The effect of pH showed that the sorption is most efficient between pH 5 and 7 for metronidazole and clindamycin between 7 and 11.
Al proyecto CONACYT “Proyectos de desarrollo científico para resolver problemas Nacionales” con clave 215997.
Krampl, Ulrike. ""Sous prétexte de magie" : les secrets des faux sorciers de la police de Paris entre croyances et escroquerie au XVIIIe siècle." Paris, EHESS, 2004. http://www.theses.fr/2004EHES0005.
Full textAfter a partial decriminalization of the crime of witchcraft by royal edict of 1682, the police of Paris continues to persecute men and women who practice any kind of magic (treasure hunting, invocation of spirits or the devil, divination/astrology, "secret" remedies for the body, love, chance at gambling) or who engage in the transmutation of metals. Throughout the 18th century the police calls them "falses witches". A detailed study of contemporary texts (dictionaries, treatises, police records) traces the ways of how the term "magic" is constituted through language and its practice. It also shows that the exercise of magic in the city fundamentally addresses the domain of the "secret". Thus, the issues at stake are of prime importance to contemporaries, as they concern the constitution of a "public", enrichment and the social and economic organization of the city. This novel and original configuration of magic emphasizes above all its commercial dimension : the "false witches" are accused of "abusing the credulous public", and more frequently, of "fraudulence"; this new vision of magic is for the first time to be officially taken into account during the French revolution (legislation of 1791). Magic appears to be placed between possible transcendence and the omnipresent risk of swindling. This ambivalent social and epistemological position brings forth a specific form of inscription into space and time through which the dynamics of magical beliefs can be explored. In this sense, the "false witches" of the Paris police prove an interesting means to reconsider the history of 18th century urban life between imagination and material realilty
Rovinsky, Thomas. "Conan fascisten? En idéanalytisk studie kring sword and sorcery och Robert E. Howards fiktive barbar." Thesis, Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18267.
Full textUppsatsnivå: D
Alvarez, García Sonia. "Evaluación del proceso de sorción de metamidofos en medio acuoso con una zeolita natural modificada con Hexadeciltrimetilamonio (HDTMA) y determinación de los parámetros termodinámicos." Tesis de doctorado, Universidad Autónoma del Estado de México, 2018. http://hdl.handle.net/20.500.11799/99561.
Full textWorldwide, the pesticides use has contributed significantly to the improvement and increase of food production. However, its indiscriminate and uncontrolled use has caused the emergence of resistant pests, soil pollution, air and mainly water, as well as the intoxication and death of various living organisms. Methamidophos is a systemic organophosphate pesticide with insecticidal and acaricide, banned in many countries for being considered a high toxicity pesticide due to adverse effects on the environment and human health. However, in Mexico, it is the second most widely used pesticide. It should be noted that most publications related to its quantitative determination uses High-Performance Liquid Chromatography (HPLC) or Gas Chromatography (CG) coupled to Mass Spectrometry (MS), these methods are extremely expensive and few laboratories in Mexico count on them. In addition, the conventional methods of elimination for this type of pollutants have not been proven effective, so, over the last decade, researchers have focused on methamidophos elimination by diverse methods, among which adsorption is not reported yet. This is an efficient, low-cost and accessible method for various pollutants; and in recent years, many new adsorbing materials have been investigated, including modified zeolitic materials with various surfactants. Evaluating the thermodynamic parameters involved, such as enthalpy (ΔH°), entropy (ΔS°) and free Gibb energy (ΔG°) are useful for determining the nature and type of mechanism that predominates in an adsorption process. Due to the aforementioned problems, it is important to propose new methods for the treatment of water containing this type of pollutants so this research report for the first time, on this pesticide adsorption behavior in potential adsorbent materials that allow their efficient disposal such as zeolitic materials modified with a cationic surfactant, as is HDTMA, thus opening a very wide research panorama in this area. This research carried out a systematic study on methamidophos adsorption behavior on the studied zeolitic materials, depending on diverse physicochemical parameters such as the contact time effect, and methamidophos concentration; likewise, the HDTMA-modified zeolitic material with greater adsorption capacity was selected, and only in this material was evaluated the adsorbent amount, pH effect and temperature effect of the solid/liquid systems to study and were determined thermodynamic parameters.
PROYECTOS CONACYT “Proyectos de desarrollo científico para resolver problemas nacionales” con clave 215997.
Bourdier, Camille. "Paléogéographie symbolique au Magdalénien moyen : apport de l'étude des productions graphiques pariétales des abris occupés et sculpté de l'Ouest français (Roc-aux-Sorciers, Chaire-à-Calvin, Reverdit, Cap-Blanc)." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14174/document.
Full textThanks to the association of rock-art and a chrono-cultural context, the occupied and decorated rock-shelters appear to be particularly appropriate to consider the spatio-temporal structuration of the Middle Magdalenian. Based on analytical tracings, the techno-stylistic study of four rock-art sites (Roc-aux-Sorciers, Chaire-à-Calvin, Reverdit, Cap-Blanc) reveals a double process of unity and regionalization. A tradition of the Magdalenian parietal sculpture appears, in the continuity of the Solutrean sculpture. Two groups can be distinguished however. The “Roc-aux-Sorciers group” spreads from Vienne to Eastern Périgord. Inside, the analogies between the Roc-aux-Sorciers and Chaire-à-Calvin friezes raises the question of their author(s), and beyond their inhabitants. The “Cap-Blanc group” coexists in Périgord. The difference between Roc-aux-Sorciers and Cap-Blanc is also found in the archaeological material. Could these symbolic groups illustrate two socio-cultural groups?Finally, the socio-cultural function of sculptured sites is tackled through the choice of sculpture. Inside the decorated sites of Eastern Vienne, the monumental sculptured frieze of Roc-aux-Sorciers rock-shelter certainly was public art, associated with large occupations. Then the frieze would have acted as an element of social cohesion. It could also have served as a territorial mark facing other populations (La Garenne group?)
Severino, Lazo Raisa Jordana Geraldine. "Sorción y solubilidad del cemento ionómero de vidrio y el cemento ionómero de vidrio modificado con resina." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2015. https://hdl.handle.net/20.500.12672/4452.
Full text--- The aim of this study was to determine differences in sorption and solubility of a conventional glass ionomer cement and a resin-modified glass ionomer cement at 7, 15 and 30 days. Materials and Methods: 24 discs of each material were prepared and divided into 3 subgroups (7, 15 and 30 days) of 8 discs, randomly selected. The protocol established by the ISO 4049 for water sorption and solubility test was used. The discs were placed in an oven at 37 °C to constant mass (m1), then were immersed in 10 ml of distilled water. The discs were removed from the distilled water on the days indicated, and weighed (m2), then dried and re-weighed (m3). At the end of these process, their morphology was evaluated in a scanning electron microscope. Results and Conclusions: The sorption and solubility calculation was performed using mathematical expressions interrelated. The Krustal Wallis test, T-Student and U. de Mann-Whitney (p<0,05) showed statistically significant differences in both groups for both sorption and solubility. The resin-modified glass ionomer cement showed the highest sorption values (142,3195 ± 13,9402), while the conventional ionomer obtained the highest solubility values (36,4286 ± 14,5941) Keywords: Sorption, solubility, glass ionomer cement, resin-modified glass ionomer cement.
Tesis
Sullivan, Maryse. "Entre fiction et histoire : la construction de la figure de la sorcière dans la littérature contemporaine." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39386.
Full textAbe, Junko. "La femme médiatrice dans les oeuvres de Yanagita Kunio et de Jules Michelet (Miko et Sorcière)." Paris 3, 1991. http://www.theses.fr/1991PA030061.
Full textThis thesis consists in a comparaison between two figures of women as mediators : the miko and the witch, created respectively by a japanese author yanagita kunio (1875-1961) and by jules michelet (1798-1874). We have chosen the concept of modernization as an axe of comparison, in order to establish a parallel between two figures. Dur work is devided in two sections : a thematic study of the structure of these two characters and an analysis of ideological contexts which conditionned their creation. It appears from this that these women as mediators represent an antithesis to modernization
Manzo, Sandoval Valentina Andrea. "Microextracción por sorción con disco rotatorio (RDSE) de fármacos antiinflamatorios no esteroidales (AINEs) desde muestras acuosas." Tesis, Universidad de Chile, 2015. http://repositorio.uchile.cl/handle/2250/136843.
Full textEn las últimas dos décadas, los contaminantes orgánicos persistentes y los metales pesados eran el foco de interés y considerados como contaminantes prioritarios, por lo cual eran parte de programas de seguimiento intensivo. Hoy en día la emisión de contaminantes “emergentes” se ha convertido en un problema medioambiental y existe un consenso en que se puede requerir la intervención de legislación respecto a su utilización. Estos contaminantes se derivan principalmente de productos utilizados en grandes cantidades en la vida cotidiana, tales como productos farmacéuticos de uso humano, veterinario, de cuidado personal, plastificantes y aditivos industriales. La característica de estos contaminantes es que no necesitan ser persistentes en el medioambiente para causar efectos negativos, ya que su alta transformación y tasa de retiro puede ser compensada con su introducción continua al medio ambiente. Los antiinflamatorios no esteroidales (AINEs) se encuentran entre los fármacos más frecuentemente detectados en el medioambiente. Debido a su hidrofilicidad y estabilidad, tienden a permanecer en la fase acuosa y no son totalmente eliminados por las plantas de tratamiento de aguas servidas, y por consecuencia, entran al medio acuático y son detectados en aguas superficiales. En este trabajo se realizó un estudio sobre la extracción de seis fármacos entre ellos ácido salicílico, ibuprofeno, naproxeno, ketoprofeno, ácido mefenámico y diclofenaco, desde muestras acuosas mediante el método de microextracción por sorción en disco rotatorio (RDSE) modificado con una cavidad central que permite la incorporación de la fase Oasis®HLB, la cual se cubre con un papel filtro y se soporta con un anillo de teflón para evitar la pérdida de fase. Los analitos son retenidos y pre-concentrados en la fase sorbente inmovilizada sobre el disco, posteriormente son desorbidos con un pequeño volumen de disolvente, derivatizados y determinados por cromatografía gaseosa acoplada a espectrometría de masas (GC-MS). Las condiciones optimizadas de extracción fueron una agitación a 3000 rpm por un tiempo de 90-100 minutos, volumen de muestra de 50 mL ajustado a pH 2 y 60 mg de fase Oasis®HLB dentro de la cavidad del disco. La desorción de los compuestos se realizó con dos adiciones de 5 mL de metanol por 10 minutos cada una, posteriormente se evaporó con nitrógeno a sequedad y se reconstituyó con 0,5 mL de acetato de etilo. El extracto final se derivatizó con 20 μL de N-metil-N-tert-butildimetilsilil-trifluoroacetamida (MTBSTFA) por una hora a 60°C y se determinaron los analitos por GC-MS. Además se incorporaron dos estándares subrogantes (fenoprop y ácido meclofenámico) y un estándar interno (hexaclorobenceno). Los porcentajes de recuperación en una muestra acuosa enriquecida con 20 μgL-1 de fármacos estuvieron en el intervalo de 71-104% ± 2-8% y los límites de detección y cuantificación entre 1-33 ngL-1 y 3-109 ngL-1, respectivamente. El método descrito fue aplicado para el análisis de afluentes y efluentes de plantas de tratamiento de aguas residuales de Santiago, Chile. La concentración de fármacos detectados estuvo entre 1,5 y 13,4 μgL-1 y 1,0-3,2 μgL-1 en el afluente y efluentes, respectivamente. Las muestras fueron analizadas mediante extracción en fase sólida (SPE) y no se observaron diferencias significativas en la determinación de la concentración de la mayoría de los AINEs, indicando que el sistema RDSE es un método alternativo para la preparación de muestras acuosas. Alternativamente a la fase HLB se estudio la fase basada en polímeros de impresión molecular (MIP) para el análisis de aguas residuales. El MIP se sintetiza a partir del monómero (1-vinilimidazol), el agente entrecruzante (divinilbenceno) y la plantilla difenilamina. Paralelamente se lleva a cabo la misma síntesis sin la molécula plantilla (NIP) con fines comparativos. Se observó que bajo las mismas condiciones, el MIP extrae significativamente más AINEs que contienen la difenilamina en su estructura (o parte de ella) que el NIP. Las mayores diferencias significativas entre MIP y NIP se observaron para diclofenaco y ácido mefenámico, indicando claramente el efecto de la plantilla en la extracción. Las recuperaciones del método fueron entre 100-112% ± 5-6%, con límites de detección entre 60-223 ngL-1. En el análisis de aguas residuales de la planta de tratamiento de Santiago, se obtuvo concentraciones de fármacos entre 1,6-4,3 μg L-1 en el afluente y de 1,4-3,3 μgL-1 en el efluente. Finalmente, considerando que en los últimos años las técnicas de extracción se han enfocado en lograr avances en cuanto a la automatización, miniaturización y simplificación de las metodologías de extracción, se propone un nuevo enfoque automático de microextracción por sorción con disco rotatorio (RDSE) combinado con un sistema en flujo programable basado en el análisis por inyección secuencial (SIA) para la limpieza y preconcentración de especies orgánicas de baja polaridad en muestras de orina (AINEs) y su determinación por cromatografía líquida (LC). La fase de extracción utilizada fue octadecil C18. Se demostró que la película de C18 puede ser reutilizable durante al menos 15 extracciones consecutivas en orina, sin necesidad de reemplazar la fase o cambiar el disco rotatorio. Las recuperaciones relativas de AINEs en orina oscilaron entre 101 y 106 % utilizando una curva de calibración en matriz, con una eficiencia de extracción de 30-38% y con factores de enriquecimiento de aproximadamente 17 en 10 mL de muestra de orina y RSD entre 3 y 6 %. Los límites de detección del método de extracción en línea oscilaron entre 0.02 y 0.04 mg L-1. Ademas, se determinaron AINEs en muestras de orina de personas que recibieron la administración oral de ibuprofeno y diclofenaco, lo que indica una metodología eficaz para la limpieza de orina y análisis de drogas ácidas a niveles biológicamente relevantes
Over the past two decades, persistent organic pollutants and heavy metals were the primary focus of environmental monitoring. Consequently, the decontamination policies applied by industrialized nations have resulted in drastic reductions of their environmental concentrations. Today, the “emerging” or “new” unregulated contaminants have become an environmental concern. These compounds are mainly derived from products used in large quantities in everyday life, such as pharmaceuticals from human use, veterinary products, personal care products, industrial plasticizers and additives. Emerging pollutants do not need to be persistent in the environment to cause negative effects because their high transformation and removal rates can be compensated by their continuous introduction into the environment. Non-steroidal anti-inflammatory drugs (NSAIDs) are among the drugs most frequently detected in the environment. Due to its hydrophilicity and stability they tend to remain in water phase and are not completely eliminated by the wastewater treatment plants (WWTP), causing consequently pollution of surface waters. The extraction of six NSAIDs, including salicylic acid, ibuprofen, naproxen, ketoprofen, mefenamic acid and diclofenac from water samples by rotating-disk sorptive microextraction (RDSE) has been studied in this work. The extraction disk device was modified compared with the traditional disk configuration. In this case, the disk contains a central cavity which allows the incorporation of a powdered sorbent phase (Oasis ® HLB in this case). The phase in the cavity is covered with a filter paper and sealed with a Teflon ring to prevent phase leakage from the cavity. The analytes were extracted from water and pre-concentrated on the sorbent phase immobilized on the disc and after to reach the extraction equilibrium, the analytes were desorbed with solvent, derivatized and determined by gas chromatography-mass spectrometry (GC-MS). The optimal conditions for the extraction were the use of 60 mg of Oasis ® HLB as sorbent, a rotational disk velocity of 3000 rpm, pH 2, sample volume of 50 mL and extraction time of 90-100 min. Desorption of the compounds was performed with two additions of 5 mL of methanol (10 min each). The extract was evaporated to dryness with N2, re-dissolved with 0.5 mL of ethyl acetate and derivatized with 20 μL of MTBSTFA for one hour at 60 ° C. NSAIDs were determined by GC-MS in SIM mode. Two surrogate standards were included for quantification (fenoprop and meclofenamic acid) and internal standard (hexachlorobenzene). The recoveries ranged from 71 to 104% with relative standard derivations (RSD) between 2 and 8%. The detection limits ranged from 1 to 33 ngL-1, and the quantification limits ranged from 3 to 109 ngL-1. The described method was applied to the analysis of influents and effluents from wastewater treatment plants (WWTP) in Santiago, Chile. The concentrations of the detected drugs ranged from 1,5 to 13,4 μg L-1 and from 1,0 to 3,2 μg L-1 in the influents and effluents, respectively. The samples were extracted also by solid phase extraction (SPE) as comparative sample preparation technique. No significant differences were observed in the determined concentrations from most of the NSAIDs, indicating that RDSE is an alternative method from the preparation of water samples. Alternatively to the HLB phase, were studied molecularly imprinted polymers (MIP) as sorptive phase to analyze wastewater samples. The MIP was synthesized from the monomer 1-vinylimidazol (VI) together with the cross-linker divinylbenzene (DVB) using diphenylamine as the template molecule. In parallel, nonmolecularly imprinted polymer (NIP) was also synthesized for comparison. It was observed that under the same conditions, MIP extracted significantly more NSAIDs containing diphenylamine (or part of this molecule) in their structure than NIP. Higher significant differences between MIP and NIP were observed for diclofenac, mefenamic acid and paracetamol, clearly indicating the effect of the template on the extraction. Recoveries of the method were between 100-112%, with relative standard deviations of 5- 6%. The limits of detection were between 60 and 223 ngL-1. Water samples from a wastewater treatment plant (WWTP) of Santiago de Chile were found to contain concentrations of these acidic drugs between 1.6 and 4.3 μgL-1 and between 1.4 and 3.3 μgL- 1 in the influent and effluent, respectively. Finally, considering that in recent years the extraction techniques have been focused on achieving advances in automation, miniaturization and simplification of methodologies of extraction, a novel automatic sorptive microextraction approach combining sequential injection-based programmable flow with rotating disk sorptive extraction (RDSE) was proposed for the clean-up and concentration of low polarity organic species in urine samples (NSAIDs) and they were further determined by liquid chromatographic (LC) assays. The extracting phase consisted of octadecyl (C18). The thin-film extracting phase was demonstrated to be reusable for at least 15 consecutive extractions in urine without removing or changing the disk. The relative recoveries of the NSAIDs in urine ranged from 101 to 106% using a matrix-matched calibration curve, with extraction efficiencies of 30–38% using a dynamic regime, an enrichment factor of approximately 17 for 10 mL sample and relative standard deviations (RSD) between 3 and 6%. The detection limits of the in-line sample preparation method coupled to LC-UV detection ranged from 0.02 to 0.04 mg L−1. Using NSAID monitored in urine from individuals who received oral administration of ibuprofen and diclofenac, the automatic sample handling method was proven to be efficient for urine clean-up and the determination of acidic drugs at biologically relevant levels
Conicyt
Reyes, Ortega Susan Daniela. "EVALUACIÓN DE LA CAPACIDAD DE SORCIÓN DE UN MATERIAL PIROLIZADO EN UN SISTEMA BINARIO DE VERDE MALAQUITA-AMARILLO 5 EN SOLUCIÓN ACUOSA." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2017. http://hdl.handle.net/20.500.11799/67636.
Full textSe hizo el presente trabajo para investigar la capacidad de sorción de un material pirolízado en un sistema binario de VM-A5 en solución acuosa, obtenido a partir de cenizas de lodos residuales, al cual se le realizó una caracterización con BET, MEB/EDS determinando la composición elemental del material y su área de superficie específica respectivamente. Se encontró que el material pirolízado es un material mesoporoso ya que el promedio de sus poros tiene un rango de 25 μm. Se prepararon disoluciones para las cinéticas, las isotermas y la curva de carga con una relación de 1:1 de VM-A5 (por ejemplo: 4g/L corresponden a 2g de Verde Malaquita y 2g de Amarillo 5) con concentraciones de 2-20 ppm, con estas se determinó la longitud de onda óptima (𝝺Máx.) de cada colorante, y su curva estándar. Se realizó una comparación experimental y analítica con una columna de lecho empacado con la finalidad de determinar si los efectos hidrodinámicos y la manera en que la solución entra en contacto con el material influyen en su capacidad de sorción. Todos estos resultados se obtuvieron con el software SimulArd 1.0 y comparados con OriginPro 2017.
Canovas, Anny. "La sorcière, la sainte et l'illuminée : les pouvoirs féminins en Espagne à travers les procès (1529-1655)." Phd thesis, Université Toulouse le Mirail - Toulouse II, 2008. http://tel.archives-ouvertes.fr/tel-00334500.
Full textCánovas, Anny. "La sorcière, la sainte et l'illuminée : les pouvoirs féminins en Espagne à travers les procès (1529-1655)." Toulouse 2, 2008. https://tel.archives-ouvertes.fr/tel-00334500.
Full textOver the Golden Age the witch, the saint and the enlightened take us back to different cultural religious and political portrayals. But being called a witch, a saint or an enlightened is also the results of trials in favour or against women. Their powers depended on the consideration society and the Church granted them in their dealing with the supernatural. The characteristics which are used to define the different types may change according to the various jurisdictions. The way women were considered good or evil during the trials determined their day to day behaviour and their interactions with others. The object of this thesis is to make a comparative analysis between those three illustrations based on case studies. Its aim is to determine the criteria which made a feminine behaviour be judged negatively or positively according to the people involved in the trials: legal authorities, witnesses and the defendants. Thus the first part of the study endeavours to highlight the official characteristics that predetermined and acknowledged each feminine type. In the second part the argument based on the women's trials under study will open the debate on the so called conclusive points that conditioned the criteria for each type. Throughout this part we will pay close attention to the way women connected to the supernatural were perceived in their location and social environment. The thoughts emerging from this second part will then allow us to extend the fields of research onto the comparison between the various speakers taking part in the trials. We need to find out whether significant points can be observed regarding what made a woman guilty or revered
Arnould, Colette. "Un aspect de la superstition dans la France médiévale : le Diable et la sorcière (XIIe-XVe siècles)." Paris 1, 1990. http://www.theses.fr/1990PA010559.
Full textThe devil was to be the central figure responsible for all forms of superstition between the 12 th and the 15 th century. The internal conflicts within the church caused it to be seen everywhere, be held responsible for all forms of heresy and, as any nonconformist act was judged heretical, the result led to "heresy-witchoraft". The inquisition thus took on a new dimension and waged a ruthless war on nonconformity with the help of authorities motivated by personal gain. If magic and witchoraft were to develop in an increasingly troubled period by the end of the midle ages, nothing, at first indicated the role played by the witch. It was only the gradual depreciation of women, associated with original sin, sexuality and ancestral dread, that would make of women "witches" bound body and soul to Satan. The inquisitor's speeches henceforth reflected a society living in fear and, far from discouraging superstition, the church, having lost its consoling role, gave the way to the most unreasonable acts while the need for scape-goats was to give birth to the witch-hunts a century later. Though the midle ages preceded era of stake-burnings, it had already created the basic behaviour codes accounting for their very existence
CASTAÑEDA, DIAZ JOSUE ALONSO 559696, and DIAZ JOSUE ALONSO CASTAÑEDA. "Sistema electrocoagulación-sorción en continuo para Remoción de Colorantes, verde malaquita y remazol amarillo en Solución Acuosa." Tesis de maestría, Universidad Autónoma del Estado de México, 2015. http://hdl.handle.net/20.500.11799/49376.
Full textBIBIANO, CRUZ LUVINA 35661, and CRUZ LUVINA BIBIANO. "Inducción del ablandamiento en aguas carbonatadas mediante procesos fisicoquímicos de desgasificación del CO2 y mecanismos de sorción." Tesis de doctorado, Universidad Autónoma del Estado de México, 2008. http://hdl.handle.net/20.500.11799/94860.
Full textFévrier-Vincent, Burkhardt Marie. "Monde de la magie, magie du monde : aspect, rôle et symbolisme de l'univers de la magie dans quelques oeuvres d'Heroic Fantasy L'enchanteur de René Barjavel, The Mists of Avalon de Marion Zimmer Bradley, The Belgariad et The Malloreon de David Eddings, Le secret de Ji de Pierre Grimbert, The Lord of the Rings de J.R.R.Tolkien." Grenoble 3, 2002. http://www.theses.fr/2002GRE39001.
Full textBrough, Edward Luna. "Jogo de mandinga - game of sorcery - : a preliminary investigation of history, tradition, and bodily practice in capoeira angola /." Connect to resource, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1195592448.
Full textBrough, Edward Luna. "Jogo de mandinga - game of sorcery -: a preliminary investigation of history, tradition, and bodily practice in capoeira angola." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1195592448.
Full textDillmann, François-Xavier. "Les Magiciens dans l'Islande ancienne : études sur la représentation de la magie islandaise et de ses agents dans les sources littéraires norroises." Caen, 1986. http://www.theses.fr/1986CAEN1005.
Full textAfter dealing with the magical phenomenon in the old icelandic commonwealth (first part, this doctoral thesis studies the anthropological (physical and psychical) characteristics of the icelandic magicians and wizards, and discusses the question about the existence of chamanism in the old norse literary sources (second part). The third part is composed of a sociological description of the icelandic magicians: juridical, economical and social (with a discussion about the profession of magician) situation, ethnical geographical origins, dwelling forms, family life and sexual behaviour, and social relationship
Goff, Jennifer. "The Serpent in the Garden: How early-modern writers and artists depicted devils and witches." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1396523520.
Full textSuchitra, Malik Alock. "Effect of reduced expression of sorcin on Ca2+ handling, in vivo heart function and transcriptional regulation." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980392691.
Full textMartínez, Peña Jessica Ivone. "Procesos entálpicos y entrópicos de sorción de humedad en el mucílago de la semilla de tamarindo (Tamarindus indica L.)." Tesis de Licenciatura, Universidad Autónoma del Estado de México, 2016. http://hdl.handle.net/20.500.11799/65331.
Full textEl objetivo general de este trabajo fue evaluar los procesos entálpicos y entrópicos de sorción de humedad en el mucílago de la semilla de tamarindo. Primeramente se extrajo y obtuvo el mucílago de la semilla de tamarindo en polvo mediante secado por aspersión. Posteriormente, se determinaron experimentalmente isotermas de adsorción a 20, 30 y 40°C, las cuales presentaron forma sigmoidal tipo II que es característica de isotermas de biopolímeros amorfos cristalinos en sistemas con vapor de agua. Las isotermas de adsorción del mucílago se ajustaron al modelo de Guggenheim Anderson De Boer (GAB) con valores de porcentaje de error menores a 3%, varianzas menores a 0.1% y coeficientes de correlación R2 mayores de 0.999 para todas las temperaturas. El contenido promedio de humedad en la monocapa fue de 11.1 kg H2O/ 100 kg s.s. en el intervalo de temperatura estudiado, mientras que los valores de C oscilaron entre 2.57 a 1.03 y los valores de K estuvieron dentro del intervalo de 0.79 a 0.72; ambas constantes disminuyeron al aumentar la temperatura. Finalmente se establecieron las condiciones de estabilidad del mucílago de tamarindo calculando las propiedades termodinámicas diferenciales e integrales (entalpía, entropía y energía libre). Todos los valores de entalpía y energía libre de Gibbs fueron negativos dentro del intervalo de contenido de humedad y de temperatura estudiados, indicando la exotermicidad del proceso de adsorción. La entropía integral mínima se considera como la condición de máxima estabilidad del sistema. En este estudio, los valores de entropía integral se localizaron en 2.36 kg H2O/100 kg s.s. con ΔSint=0.0652 kJ/mol K, 2.41 kg H2O/100 kg s.s. con ΔSint=0.0656 kJ/mol K y 2.44 kg H2O/100 kg s.s. con ΔSint=0.0652 kJ/mol K para las temperaturas de 20, 30 y 40°C, respectivamente.
Vázquez-Mejía, Guadalupe, Miranda Verónica Martínez, J. Solache-Ríos /. M, and Cheikh Fall. "SORCIÓN SIMULTÁNEA DE IONES FLUORUROS Y ARSÉNICO(V) EN UN MATERIAL DE ORIGEN NATURAL MODIFICADO CON HIERRO Y ALUMINIO." Tesis de doctorado, Elsevier, 2016. http://hdl.handle.net/20.500.11799/57938.
Full textEl elevado contenido de iones fluoruro y arsénico en el agua subterránea se presenta en varios países del mundo y la ingesta excesiva de estos iones principalmente a través del agua resulta un grave riesgo para la salud de la población. La coexistencia de estos iones puede tener efectos adversos debido a la sinergia y/o mecanismos antagónicos que conducen a consecuencias como la fluorosis dental y esquelética, cáncer y problemas neurológicos en niños. Ante esta situación es de gran interés a nivel mundial estudiar alternativas para la remoción de iones Fy/o As. Entre los métodos aplicados se tiene la adsorción, intercambio iónico, ósmosis inversa, nanofiltración electrodiálisis, diálisis, coagulación floculación y electrocoagulación. Dentro de estas tecnologías la adsorción tiene ventajas sobre las otras que la hacen factible para ser aplicada en comunidades, con poca inversión; el uso de materiales adsorbentes de bajo costo, fácil manejo y factible en su regeneración además de costos de operación por debajo de la mayoría son sólo algunas características que hacen que la adsorción sea ampliamente aplicada en la remoción de iones Fy/o As(V). En esta investigación, se emplearon dos materiales, una zeolita y una puzolana provenientes de los estados de Oaxaca y México, respectivamente, las cuales se modificaron para evaluar la eficiencia de remoción de iones Fy As(V) en solución y agua natural. Los materiales se modificaron con hierro y aluminio mediante una celda electroquímica y a partir de los hidróxidos correspondientes formados por precipitación a partir de las soluciones de cloruro de hierro y aluminio. Se caracterizaron los materiales naturales y modificados por microscopía electrónica de barrido, análisis elemental, difracción de rayos X y área específica.
Instituto Nacional de Investigaciones Nucleares, ININ. Centro Interamericano de Recursos del Agua, CIRA