223 research outputs found
Recuperación de oro mediante lixiviación por agitación con tiourea en medio ácido en la Minera Antuyo, Tiquillaca Puno
No full textEl presente trabajo de investigación tiene por objetivo recuperar oro mediante lixiviación por agitación con tiourea en medio ácido en la minera Antuyo distrito de Tiquillaca, Provincia de Puno el cual tiene un contenido de oro 3.88 g/t. Para las pruebas experimentales el mineral fue reducido a malla -200/+325, se utilizó concentraciones de tiourea de 0.0625, 0.125 y 0.25 M a diferentes valores de pH (1, 2 y 3) con una velocidad de agitación constante de 1000 rpm, a temperatura ambiente, se tomaron muestras en diferentes tiempos para evaluar el potencial oxido-reducción de sistema. De las pruebas realizadas, se tiene que a una mayor concentración de tiourea y pH 1 se obtienen porcentajes de recuperación mayores al 70%, por ejemplo, para una concentración 0.25 M de tiourea a pH 1 se consigue una recuperación de oro del 100% a los 30 minutos de iniciado la prueba. Sin embargo, a este pH para cada concentración de tiourea tenemos recuperaciones altas de oro como consecuencia un consumo excesivo de tiourea, este consumo está relacionado a la liberación de oxidantes provenientes del mineral y la formación de complejos por lo que se tiene un incremento del potencial; por lo tanto el diseño factorial 33 permite evaluar concentración de tiourea a diferente pH mostrando como primera opción a una concentración de 0.25 M de tiourea, pH 2 y un tiempo de 90 minutos una recuperación del 89.71% de oro y un consumo de tiourea de 852.5085 ppm (14.217 kg/t)
Recuperación de oro mediante lixiviación por agitación con tiourea en medio ácido en la Minera Antuyo, Tiquillaca Puno
No full textEl presente trabajo de investigación tiene por objetivo recuperar oro mediante lixiviación por agitación con tiourea en medio ácido en la minera Antuyo distrito de Tiquillaca, Provincia de Puno el cual tiene un contenido de oro 3.88 g/t. Para las pruebas experimentales el mineral fue reducido a malla -200/+325, se utilizó concentraciones de tiourea de 0.0625, 0.125 y 0.25 M a diferentes valores de pH (1, 2 y 3) con una velocidad de agitación constante de 1000 rpm, a temperatura ambiente, se tomaron muestras en diferentes tiempos para evaluar el potencial oxido-reducción de sistema. De las pruebas realizadas, se tiene que a una mayor concentración de tiourea y pH 1 se obtienen porcentajes de recuperación mayores al 70%, por ejemplo, para una concentración 0.25 M de tiourea a pH 1 se consigue una recuperación de oro del 100% a los 30 minutos de iniciado la prueba. Sin embargo, a este pH para cada concentración de tiourea tenemos recuperaciones altas de oro como consecuencia un consumo excesivo de tiourea, este consumo está relacionado a la liberación de oxidantes provenientes del mineral y la formación de complejos por lo que se tiene un incremento del potencial; por lo tanto el diseño factorial 33 permite evaluar concentración de tiourea a diferente pH mostrando como primera opción a una concentración de 0.25 M de tiourea, pH 2 y un tiempo de 90 minutos una recuperación del 89.71% de oro y un consumo de tiourea de 852.5085 ppm (14.217 kg/t)
The Dandy (Verzet): 6
No full textThis is a delightful selection of acerbic, wryly funny stories about modern relationships, queer love, and non-monogamy. In what might be considered a keystone story, 'The Sociologist', the author of a self-help book is repeatedly invited to give lectures to ‘debunk love’ but doesn’t really believe any of the things she says. Then 'The Female Dandy' of the title is a fictional journalistic feature about the rise and fall of a lesbian/feminist literary magazine and the infighting between the performatively stylish, performatively principled three women presiding. 'Remaining Isolde' depicts a straight couple’s forays into non-monogamy where it soon becomes apparent that while neither is really happy with their arrangement they feel compelled to pursue it all the same. In 'No Petting' a woman considers her own life while visiting a zoo and 'What Is It You Want to Know?' sees an elderly mother struggle with her grown daughter’s refusal to acknowledge her relationship with another woman
Tratamiento de los residuos del proceso Jarosita de la industria metalúrgica del zinc, con la finalidad de mitigar este pasivo ambiental
No full textEl proceso de lixiviación del zinc (Zn) genera cantidades importantes de residuos sólidos en forma de jarosita, producida para eliminar hierro (Fe) y sulfato de las soluciones de Zn, las cuales se almacenan en presas de residuos. En la presente tesis se hace un estudio de las jarositas provenientes de una planta de refinación en México, que tiene por objetivo mitigar este pasivo ambiental; para lo cual esta jarosita fue caracterizada por diversas técnicas y se reporto contenidos de plata (Ag) de 357 g/t, oro (Au) de 0.76 g/t, y un tamaño de partícula D80 de 19 µm; con las primeras pruebas de cianuración se confirmo su naturaleza refractaria y estabilidad, por lo tanto se evaluaron procesos de descomposición alcalina a temperaturas entre 30 a 90˚C, para liberar la Ag y obtener recuperaciones de 99.9% de Ag a las 6 horas de iniciado el proceso. Además del cianuro se evaluó el uso de tiosulfato y tiourea como agentes lixiviantes para la Ag. El tiosulfato de sodio se presenta como la mejor opción con una recuperación de 99.4% a las 2.5 horas de iniciado el proceso considerando el tiempo de descomposición, y la baja toxicidad del reactivo.
Además se caracterizaron y evaluaron la movilidad de elementos de los residuos generados encontrándose que el proceso de descomposición alcalina-lixiviación en simultáneo se encuentran dentro de las normas ambientales existentes; para el proceso de descomposición térmica y lixiviación con tiosulfato se hallaron altos niveles de Cu, Zn, Fe y Pb que hacen suponer que requieren un mayor tiempo de lavado antes de su disposición, en su composición se reportó hematita y magnetita que podrían ser utilizados en nuevas aplicaciones.The process of leaching of zinc (Zn) generates significant amounts of solid waste in the form of jarosite, produced for removing iron (Fe) and sulfate of the solutions of Zn, which are stored in waste dams. This thesis is a study of jarosites from a refinery plant in Mexico, which aims to mitigate this environmental liability, for which the jarosite was characterized by various techniques and reported content of silver (Ag) of 357 g / t gold (Au) of 0.76 g / t, and a D80 particle size of 19 microns, with the first tests cyanidation was confirmed its refractory nature and stability were evaluated therefore alkaline decomposition processes at temperatures between 30 to 90 ˚ C, to release the Ag and obtain recoveries of 99.9% Ag at 6 hours into the process. Addition of cyanide was evaluated using thiosulfate and thiourea as leaching agents for Ag Sodium thiosulfate is presented as the best option with a recovery of 99.4% at 2.5 hours into the process considering the time of decomposition, and low toxicity of the reagent.
Were characterized and also evaluated the mobility of elements of the waste generated was found that the decomposition process alkaline-simultaneous leaching are within existing environmental standards, for the thermal decomposition process and leaching with thiosulfate were found high levels of Cu, Zn, Fe and Pb which suggest that a longer require washing prior to disposal, its composition was reported hematite and magnetite that could be used in new applications.Tesi
Dandy-Walker syndrome
No full textA síndrome de Dandy-Walker (SDW) faz parte de um grupo de malformações relacionadas as disgenesias do paleocerebelo._________________________________________________________________________________________ ABSTRACT: This is a brief review on Dandy Walter syndrome. The author analyses the diagnosis and the treatment of the syndrome
Fashion Culture: From Louis Armstrong to Dizzy Gillespie: Jazz and Black Glamour
No full textIn a conversation moderated by MFIT assistant curator Elizabeth Way, historian Alphonso McClendon and vintage performer Dandy Wellington discuss the influence of jazz on 1920s fashion. McClendon is associate program director of Design & Merchandising at Drexel University and the author of "Fashion and Jazz: Dress, Identity and Subcultural Improvisation." Dandy Wellington is a jazz singer, bandleader, and vintage style activist based in Harlem in New York City."From Louis Armstrong to Dizzy Gillespie: Jazz and Black Glamour" is being held in conjunction with the upcoming FIT Graduate Studies exhibition "The Roaring Twenties and The Swinging Sixties," created in collaboration with The Museum at FIT
Dandy-Walker Syndrome – review of patients’ health situation in Poland
No full textGuz Ewa, Turowski Krzysztof, Czekirda Marta, Bartoń Elżbieta. Dandy-Walker Syndrome – review of patients’ health situation in Poland. Journal of Education, Health and Sport. 2016;6(8):181-189. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.60072
http://ojs.ukw.edu.pl/index.php/johs/article/view/3742
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 755 (23.12.2015).
755 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Author (s) 2016;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted, non commercial
use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 02.07.2016. Revised 25.07.2016. Accepted: 12.08.2016.
Dandy-Walker Syndrome – review of patients’ health situation in Poland
Ewa Guz, Krzysztof Turowski, Marta Czekirda, Elżbieta Bartoń
• 1. Ewa Guz
Neurology Nursing Department, Medical University in Lublin
8 Jaczewskiego Street; 20-950 Lublin
• 2. Krzysztof Turowski
Director of Neurology Nursing Department, Medical University in Lublin
8 Jaczewskiego Street; 20-950 Lublin
• 3. Marta Czekirda
Faculty of Nursing and Health Sciences, Medical University of Lublin
Department of Pedagogy and Medical Didactics
1 Racławickie Av. 20-059 Lublin
• 4. Elżbieta Bartoń
Neurosurgery and Pediatric Neurosurgery Clinic in Lublin
8 Jaczewskiego Street; 20-950 Lublin
Key words: Dandy-Walker syndrome, dysplasia, hydrocephalus, intraventricular shunt.
Abstract
Dandy-Walker syndrome is a congenital defect of a central nervous system characterized by a hindered flow of cerebrospinal fluid through the outflow holes of ventricle IV. Symptoms of the disease can develop slowly since the early childhood and will result in developing both hydrocephalus and anomalies related to the structure of the cerebellum. The etiology of Dandy-Walker syndrome is not known.
Aim of this work is to present the health situation of the patients with Dandy-Walker syndrome in Poland.
Material and methods
The research was conduncted from December 2011 to April 2012 and involved the group of wards of the ‘Podaj Dalej’ Dandy-Walker Syndrome Foundation who live on the territory of Poland. Overall, 36 people were examined: 15 boys and 21 girls.
Results and conclusions
Reaching the patients with Dandy-Walker syndrome is very difficult because it is a rarely occurring congenital defect, recognized usually by accident. However, the complexity of problems evolving from this disease brings the necessity of expanding the studies in many areas so they could be compared to the studies conducted in other countries. Results of this type of studies will be useful in a correct orientation of treatment and widely understood rehabilitation of patients with Dandy-Walker syndrome as well as education both families and the patients
The renaissance of the dandy in Christian Kracht’s work : the dandy as a social figure and habitus in Faserland, 1979 and Ich werde hier sein im Sonnenschein und im Schatten
No full textDie Arbeit untersucht anhand der ersten drei Romane "Faserland", "1979" und "Ich werde hier sein im Sonnenschein und im Schatten" von Christian Kracht die Renaissance der Sozialfigur des Dandys in der deutschsprachigen Gegenwartsliteratur. Aus einer literatursoziologischen Sicht werden die Dandy-Figur, deren Charakteristika und der Dandy-Habitus genauer beschrieben. Die Analyse erfolgt im disziplinären Rahmen der „Cultural Studies“ und des Genres „Popliteratur“. Nach einer Begriffsklärung des Wortes „Dandy“ wird die Geschichte der Dandy-Figur am Beispiel berühmter Repräsentanten aufgerollt. Ein daraus erarbeiteter Katalog von Eigenschaften wird auf die Dandy-Figuren in den genannten drei Romanen angewendet. In einem ersten Schritt werden Geschlecht, Habitus, Ästhetik, räumliche und zeitliche Gebundenheit der „neuen“ und „alten“ Dandy-Figuren miteinander verglichen. Sodann werden die Roman-Figuren anhand von vier zentralen Rollentypen analysiert: die des unzuverlässigen Erzählers, die des Flaneurs, die des Transhumanen und die des Black Dandys. Der entscheidende Unterschied zwischen „alten“ und „neuen“ Dandys liegt in der Erweiterung ihres Wirkungsbereichs von 'Klasse' auf 'Geschlecht' und 'Rasse'. Auch deshalb werden Begriffe wie „Effeminiertheit“, „Performativität“ und „Camp“ schon vorab näher behandelt. Ebenso haben sich die Aktionsräume des Dandys von städtischen Boulevards hin zu Flughäfen, Slums und Partys erweitert. Die Figuren in Christian Krachts Romanen benutzen den Dandy als eine von vielen Masken. Die Autorenpersona Christian Kracht und die Roman-Figuren haben starkes Dandy-Potential. Das hervorstechendste Merkmal der „neuen“ Dandy-Figuren ist, dass diese mehr noch als die „alten“ zu Maschinen, Cyborgs und Kunstwerken werden.This master thesis examines on the basis of Christian Krachts novels Faserland, 1979 and Ich werde hier sein im Sonnenschein und im Schatten the renaissance of the social figure of the dandy in German contemporary literature. The dandy figure, concise characteristics and the dandy habitus are analysed from a literature-sociological point of view. The analysis is embedded in the fields Cultural Studies and pop culture. The meaning of the word “dandy” is described, the history of the dandy figure is told and well-known dandies are shown. By means of a catalogue which includes dandy attributes, the dandy figures of the novels are studied. “New” and “old” dandy figures are juxtaposed in terms of gender, habitus, aesthetics, space and time. Christian Krachts dandy figures are checked under the following aspects: the unreliable narrator, the flaneur, the transhuman and the Black Dandy. The most decisive difference between “old” and “new” dandies is that their sphere of action has expanded from class towards gender and race. Terms like “effeminacy”, “performativity” and “Camp” were discussed beforehand. Furthermore, the dandies spaces have changed from the urban boulevards to airports, slums and parties. Christian Krachts literary figures use the dandy as a mask among many others. The author persona Christian Kracht and the literary figures have a strong dandy potential. The most striking feature of the “new” dandy figures is the fact that they are becoming more and more machines, cyborgs and finally works of art.vorgelegt von Katharina Wiesler, Bakk. philZusammenfassungen in Deutsch und EnglischAbweichender Titel laut Übersetzung des Verfassers/der VerfasserinMasterarbeit Karl-Franzens-Universität Graz 2019 2133
The renaissance of the dandy in Christian Kracht’s work : the dandy as a social figure and habitus in Faserland, 1979 and Ich werde hier sein im Sonnenschein und im Schatten
No full textDie Arbeit untersucht anhand der ersten drei Romane "Faserland", "1979" und "Ich werde hier sein im Sonnenschein und im Schatten" von Christian Kracht die Renaissance der Sozialfigur des Dandys in der deutschsprachigen Gegenwartsliteratur. Aus einer literatursoziologischen Sicht werden die Dandy-Figur, deren Charakteristika und der Dandy-Habitus genauer beschrieben. Die Analyse erfolgt im disziplinären Rahmen der „Cultural Studies“ und des Genres „Popliteratur“. Nach einer Begriffsklärung des Wortes „Dandy“ wird die Geschichte der Dandy-Figur am Beispiel berühmter Repräsentanten aufgerollt. Ein daraus erarbeiteter Katalog von Eigenschaften wird auf die Dandy-Figuren in den genannten drei Romanen angewendet. In einem ersten Schritt werden Geschlecht, Habitus, Ästhetik, räumliche und zeitliche Gebundenheit der „neuen“ und „alten“ Dandy-Figuren miteinander verglichen. Sodann werden die Roman-Figuren anhand von vier zentralen Rollentypen analysiert: die des unzuverlässigen Erzählers, die des Flaneurs, die des Transhumanen und die des Black Dandys. Der entscheidende Unterschied zwischen „alten“ und „neuen“ Dandys liegt in der Erweiterung ihres Wirkungsbereichs von 'Klasse' auf 'Geschlecht' und 'Rasse'. Auch deshalb werden Begriffe wie „Effeminiertheit“, „Performativität“ und „Camp“ schon vorab näher behandelt. Ebenso haben sich die Aktionsräume des Dandys von städtischen Boulevards hin zu Flughäfen, Slums und Partys erweitert. Die Figuren in Christian Krachts Romanen benutzen den Dandy als eine von vielen Masken. Die Autorenpersona Christian Kracht und die Roman-Figuren haben starkes Dandy-Potential. Das hervorstechendste Merkmal der „neuen“ Dandy-Figuren ist, dass diese mehr noch als die „alten“ zu Maschinen, Cyborgs und Kunstwerken werden.This master thesis examines on the basis of Christian Krachts novels Faserland, 1979 and Ich werde hier sein im Sonnenschein und im Schatten the renaissance of the social figure of the dandy in German contemporary literature. The dandy figure, concise characteristics and the dandy habitus are analysed from a literature-sociological point of view. The analysis is embedded in the fields Cultural Studies and pop culture. The meaning of the word “dandy” is described, the history of the dandy figure is told and well-known dandies are shown. By means of a catalogue which includes dandy attributes, the dandy figures of the novels are studied. “New” and “old” dandy figures are juxtaposed in terms of gender, habitus, aesthetics, space and time. Christian Krachts dandy figures are checked under the following aspects: the unreliable narrator, the flaneur, the transhuman and the Black Dandy. The most decisive difference between “old” and “new” dandies is that their sphere of action has expanded from class towards gender and race. Terms like “effeminacy”, “performativity” and “Camp” were discussed beforehand. Furthermore, the dandies spaces have changed from the urban boulevards to airports, slums and parties. Christian Krachts literary figures use the dandy as a mask among many others. The author persona Christian Kracht and the literary figures have a strong dandy potential. The most striking feature of the “new” dandy figures is the fact that they are becoming more and more machines, cyborgs and finally works of art.vorgelegt von Katharina Wiesler, Bakk. philZusammenfassungen in Deutsch und EnglischAbweichender Titel laut Übersetzung des Verfassers/der VerfasserinMasterarbeit Karl-Franzens-Universität Graz 2019 2133
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