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Rimozione dell'olio mediante flottazione con biosurfattante

Rimozione dell'olio mediante flottazione con biosurfattante

Maitê Medeiros de Santana E Silva; Paula K L S Valença; Maria V P Rocha

Edizioni Sapienza
2024
pokkari
La generazione di rifiuti nella maggior parte dei processi industriali praticamente inevitabile. Nell'industria petrolifera, uno dei maggiori problemi per l'ambiente il grande volume di acqua prodotto nei processi di produzione del petrolio. Attualmente, l'uso della flottazione si dimostrato molto efficiente rispetto ad altri metodi, che non sono in grado di rimuovere gran parte dell'olio emulsionato. In questo contesto, il presente lavoro mira a valutare l'efficienza dei processi di flottazione su colonna utilizzando un biosurfattante come agente demulsificante che accelera la separazione di fase.
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Fiber Optic Fluorescence Thermometry

Fiber Optic Fluorescence Thermometry

Z.Y. Zhang; L.S. Grattan

Chapman and Hall
1994
sidottu
This book brings together in a single volume the principles, practice and applications of the technology and places it in the context of other recent developments in optical fiber sensor technology. Relevant solid-state physics relating to fluorescent emission is reviewed to aid in materials selection all aspects of sensor design including detector circuit configurations are covered. Cross-referencing of systems with other temperature sensors and comparative evaluations with other sensor types are included.
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Postpartum Depression

Postpartum Depression

Michael W. O'Hara; L.S. Cohen

Springer-Verlag New York Inc.
2011
nidottu
Postpartum Depression: Causes and Consequences chronicles a decade and a half of research into this relatively common mood disorder experienced in various forms by between 10-40% of all women following delivery. The author has conducted three major studies all of which are presented in this volume. The most recent study comprises the bulk of the monograph and presents the results with regard to psychological, social and hormonal factors in postpartum depression and the blues. Information regarding the epidemiology, etiology and treatment of postpartum depression is also included. The work described in this volume represents the attempt by the author to begin to address several of the major unresolved questions regarding the prevalence, causes, and consequences of postpartum mood disorders. The important negative implications of poor maternal adjustment for both the new mother and her family as well as the increased awareness of childbearing women who are now demanding answers and information make this book indispensable for all practitioners in psychology, psychiatry and obstetrics-gynecology as well as for the students of these disciplines.
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The Chorleywood Bread Process

The Chorleywood Bread Process

Stanley P. Cauvain; L S Young

Woodhead Publishing Ltd
2006
sidottu
The introduction of the Chorleywood Bread Process was a watershed in baking. It sparked changes in improver and ingredient technology, process and equipment design which have had a profound impact on baking processes and the structure of the industry. Written by two of the world’s leading experts on the process, this important book explains its underlying principles and ways of maximising its potential in producing a wide range of baked products. After a brief review of the basic principles of bread making, the book outlines the development and fundamental characteristics of the Chorleywood Bread Process. The following group of chapters review the key steps in the process, beginning with ingredient quality and quantities. Other chapters consider dough mixing and processing. Building on this foundation, the authors then review common quality defects and how they can be prevented or resolved. The book then considers how knowledge-based software systems can help to manage the process. The concluding chapters review the range of bakery products that can be produced using the process, how it can best be applied in different kinds of bakery and likely future developments. The Chorleywood Bread Process is a standard work for all bakers around the world wishing to maximise the potential of the process, and for scientists, technologists and students wanting a better understanding of the process and its place in commercial bread making.
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The Neuropsychological Analysis of Problem Solving

The Neuropsychological Analysis of Problem Solving

A.R. Luria; L.S. Tsvetkova

St Lucie Press
1990
sidottu
For any of us, problem solving is a daily event. For some, it is a major task. This historical book puts to use neuropsychological methods to analyze the process of problem solving. Experience shows that the process is psychologically so complicated that standard methods established in pedagogy and psychology are insufficient to precisely determine individual factors hindering effective problem solving. The authors present techniques for rehabilitation training which could compensate for the impairments observed in individual cases. Luria's work has transformed rehabilitation training, enabling the evaluation of rehabilitation principles and methods. Luria's thinking and conceptual style reflect his genius and rich understanding of brain-behavior relationships. As those who have read it agree, Luria demonstrates remarkable insight with his complex analysis and his qualitative analysis is "breathtaking."
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A Contribuição do Estudo Supervisionado no Processo de Aprendizagem

A Contribuição do Estudo Supervisionado no Processo de Aprendizagem

Maria Severina Gomes Melo Da Roch Rocha; Henrique M L Silva; Fernando L S Correia

Novas Edicoes Academicas
2020
pokkari
A presente pesquisa teve como objetivo principal analisar a pr tica do Estudo Supervisionado da Escola de Refer ncia em Ensino M dio de Timba ba, visando verificar se h inova o pedag gica nesta pr tica e quais as contribui es da mesma para o processo de aprendizagem dos estudantes desta institui o de ensino. Para essa investiga o utilizamos uma abordagem qualitativa, o estudo de caso etnogr fico. Como procedimentos metodol gicos foram utilizados registros fotogr ficos, entrevistas, question rios e an lises de documentos. Participaram como sujeitos da pesquisa um total de 415 alunos e 12 professores. Para fundamenta o te rica deste estudo, utilizamos as concep es propostas por autores de refer ncia nas reas de inova o pedag gica, pr ticas pedag gicas, aprendizagem e mudan as de paradigmas, que nos proporcionaram a discuss o dos principais conceitos te ricos necess rios ao desenvolvimento deste trabalho. OS resultados mostraram contexto em que a pr tica do Estudo Supervisionado contribui diretamente na forma o da autonomia, das forma o cr tica e da co-participa o no processo de ensino e aprendizagem.
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Plastics for Corrosion Inhibition

Plastics for Corrosion Inhibition

V.A. Goldade; L.S. Pinchuk; A.V. Makarevich; V.N. Kestelman

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2005
sidottu
One of the key problems of failure-free operation of machinery is prevention of corrosion. The global scale of modern production makes this problem even more critical. At the beginning of the 21st century industrial contami- tion and the corrosion-active nature of the environment reached a level such that corrosive damage of materials became commensurate with their prod- tion volume and expenditure on anticorrosion protection of machines became comparable with investments in basic production. Anticorrosion techniques changed from being an auxiliary service to industrial enterprises into a dev- oping, scienti?cally intensive and generously ?nanced branch of production. Polymers occupy a very speci?c place amongst anticorrosion techniques. Polymers combine good chemical resistance with impermeability to di?- ent media and unusual deformation characteristics. The main principle of their application as anticorrosion means is the creation of a tight barrier that insulates metal machine parts or constructions from corrosion agents. The advantages of polymers allow the creation of such a barrier at minimal cost,providingprotectionoftheworkingmachinesfromcorrosion,combining their manufacture with preservation and decreasing the cost of anticorrosion. This is one of the main reasons why world production of polymer materials increased by almost 50% in the past decade.
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Plastics for Corrosion Inhibition

Plastics for Corrosion Inhibition

V.A. Goldade; L.S. Pinchuk; A.V. Makarevich; V.N. Kestelman

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2010
nidottu
One of the key problems of failure-free operation of machinery is prevention of corrosion. The global scale of modern production makes this problem even more critical. At the beginning of the 21st century industrial contami- tion and the corrosion-active nature of the environment reached a level such that corrosive damage of materials became commensurate with their prod- tion volume and expenditure on anticorrosion protection of machines became comparable with investments in basic production. Anticorrosion techniques changed from being an auxiliary service to industrial enterprises into a dev- oping, scienti?cally intensive and generously ?nanced branch of production. Polymers occupy a very speci?c place amongst anticorrosion techniques. Polymers combine good chemical resistance with impermeability to di?- ent media and unusual deformation characteristics. The main principle of their application as anticorrosion means is the creation of a tight barrier that insulates metal machine parts or constructions from corrosion agents. The advantages of polymers allow the creation of such a barrier at minimal cost,providingprotectionoftheworkingmachinesfromcorrosion,combining their manufacture with preservation and decreasing the cost of anticorrosion. This is one of the main reasons why world production of polymer materials increased by almost 50% in the past decade.
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Comparative Physiology and Evolution of Vision in Invertebrates

Comparative Physiology and Evolution of Vision in Invertebrates

H. Autrum; L.S. Goodman; J.B. Messenger; R. Wehner

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2011
nidottu
Volume VII, Part 6 brings to a conclusion the Handbook of Sensory Physiology, the publication of which has spanned 9 years. In the General Preface of Volume I it was stated that: "The purpose of this handbook is not encyclopedic completeness, nor the sort of brief summaries provided by periodic annual reviews. " The Editorial Board and the editors hope that this golden mean has been achieved: An absorbing, thorough, but nevertheless exemplary presentation should, with the aid of relevant examples, enable the reader to become accustomed with the numerous facets of the sensory system without sacrificing an overview of the subject. The main issues of sensory physiology were formulated in the nineteenth and early twentieth centuries by JOHANNES MULLER, H. VON HELMHOLTZ, E. HERING, S. EXNER, 1. VON KRIES, W. TRENDELENBURG, and E. D. ADRIAN, to name but a few. Modern development in the field has been characterized by interdisciplinary cooperation, the foundation for which was laid in the second half of the nineteenth century by VON HELMHOLTZ, EXNER, MAXWELL, and others. Progress made in bio­ chemistry, physics, mathematics, and information theory has not only made pos­ sible unanticipated refinement of methods of measurement; it has above all per­ mitted the transformation of mere hypotheses into established, accepted theories as well as revealing new problems. However, at the same time such development has, in recent decades, resulted in the literature becoming dispersed in specialist journals; consequently, it has grown increasingly difficult to survey.
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Congenital Adrenal Hyperplasia

Congenital Adrenal Hyperplasia

M.I. New; L.S. Levine

Springer-Verlag Berlin and Heidelberg GmbH Co. K
2011
nidottu
Congenital adrenal hyperplasia (CAH) consists of a group of disorders of adrenal steroidogenesis. Each disorder results from an inherited deficiency of one of the several enzymes necessary for normal steroid synthesis. The different enzyme deficiencies produce characteristic patterns of hormonal abnormalities; the clinical symptoms of the different forms of CAH depend on the particular hormones that are deficient or that are produced in excess. The earliest documented description of CAH was by DeCrecchio in 1865 (DeCrecchio 1865). This Neapolitan anatomist described a cadaver having a penis with first degree hypospadias but no externally palpable gonads. Dis- section revealed a vagina, uterus, fallopian tubes, ovaries, and markedly enlarged adrenals. It is interesting that the subject suffered a confusion of sex assignment, being declared a female at birth and a male 4 years later. He conducted himself as a male sexually and socially. Since the original descrip- tion of this case, investigators have unravelled the pathophysiology of the inborn errors of steroidogenesis. 1 Steroidogenesis and Enzymatic Conversions of Adrenal Steroid Hormones A. Steroidogenesis The adrenal synthesizes three main classes of hormones: mineralocorticoids (17-deoxy pathway), glucocorticoids (17-hydroxy pathway), and sex steroids.
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Die Schleifmaschine in der Metallbearbeitung

Die Schleifmaschine in der Metallbearbeitung

H. Darbyshire; G.L.S. Kronfeld

Springer-Verlag Berlin and Heidelberg GmbH Co. K
1908
nidottu
Die englische Ausgabe dieses Werkes entstand unter dem Gesichtspunkte, dafi es notwendig sei, die praktische Entwicklung der Schleifprozesse und ihre V orteile im Prinzip ldarzulegen. Die ungeahnt grofie Bedeutung, die das Schleifen in der Metall- bearbeitung mehr und mehr zu gewinnen berufen ist, macht es er- forderlich, dafi aus der Praxis heraus einmal die Resultate zu- sammellgestellt werden, welche fur das Schleifverfahren und seine Anwendung nach der technischen und wirlschaftlichen Seite hin gewinnbringend erscheinen. Diese Griinde waren auch Veranlassung fur die deutsche Aus- gabe. Freilich konnte - fur deutsche Verhaltnisse - der englische Text nicht wortlich iibernommen werden. Uberfliissige Breite der Darstellung wurde vielfach gekiirzt, und neuere praktische Ergeb- nisse durch eingehendere Darstellung fur den Leser klarer gestellt mit moglichst geringen Abweichungen vom englischen Original. Zur weiteren Erlauterul!g habe ich eine Anzahl Illustrationen dem Texte neu hinzugefugt. Ich entnahm die Figuren 2, 3, 4, 7, 9, 10, 14, 25 und 29 der VerOffentlichung von G. Schlesinger: Schleifversuche mit kunstlichen Schmirgelscheiben usw. (Werkstattstechnik 1907. Seite 441 U); die Figuren 8, 17, 18, 23, 40, 53, 54, 64, 67, 68, 69 und 70 aus den Broschiiren "Anleitung zur Inbetriebsetzung und Behandlung del' Norton-Rundschleifmaschinen", "Behandlung der Norton-Universal-Werkzeug-Schleifmaschinen im Betriebe" und dem Kataloge der Firma Ludw. Loewe & Co. A.-G., Berlin; die Figuren 33, 48, 52, 56, 71 und 72 aus der Broschiire "Schleif- maschinen" der Firma F. G. Kretschmer & Co". Frankfurt a. M, ') Siehe auch: Mitt. liber Forschungsarbeiten a. d. Gebiete des Ingenieurwesens Heft 43. Berlin 1907. Vorwort.
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Plody prosveschenija. Rasskazy

Plody prosveschenija. Rasskazy

M.N. Tarlovskij; L.S. Novogrudskij; L.N. Popov; Valentin Postnikov; Marina Druzhinina

Enas-Kniga
2019
sidottu
Sbornik vesjolykh rasskazov o shkolnoj zhizni. O zabavnykh proisshestvijakh, ozornykh prodelkakh i vydumkakh uchenikov. O tom, na kakie khitrosti oni inoj raz puskajutsja, chtoby ne gotovit uroki, i chto iz etogo mozhet vyjti. Sredi geroev sbornika i sovetskie shkolniki, kotorye khodili v pionerskikh galstukakh, i sovremennye rebjata. Mnogoe za eti gody izmenilos v zhizni detvory, odnako po-prezhnemu nekotorym uchenikam gorazdo prijatnee begat ves den s futbolnym mjachom ili smotret interesnyj film, a vovse ne vypolnjat domashnie zadanija, kotorykh vsegda zadajut slishkom mnogo! Tak chto odni malchishki i devchonki vpolne mogut uznat v personazhakh etikh rasskazov sebja, a drugie - ot dushi posmejatsja nad nezadachlivymi gerojami. Dlja mladshego shkolnogo vozrasta.
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Fluidificante para substituição da fluorita

Fluidificante para substituição da fluorita

Valdeci Paula Alvarenga; Carlos A Silva; Sergio L S Costa

Novas Edicoes Academicas
2018
pokkari
A quantidade de esc ria necess ria para o refino do a o no processo MRP-L (Metal Refining Process with Lance) considerada uma das vari veis importantes, exercendo influ ncia direta para o sucesso do refino prim rio do a o l quido. Embora a quantidade de esc ria possa variar um pouco entre as aciarias, um valor considerado razo vel est entre 70 e 80 kg de esc ria por tonelada de a o l quido. A principal vari vel que contribui de maneira significativa para a determina o da quantidade de esc ria a massa de sil cio na carga. Este trabalho teve como principal proposi o avaliar a viabilidade da utiliza o de esc ria recirculada visando substitui o parcial da fluorita adicionada durante a etapa de sopro no convertedor MRP-L (Metal Refining Process with Lance) da aciaria da Aperam-Usina de Tim teo. Foi elaborado um planejamento de experimentos visando substitui o total e parcial da fluorita no refino prim rio do a o, onde foram realizadas as corridas com e sem utiliza o de esc ria recirculada briquetada. Foram coletadas amostras do banho met lico e da esc ria ap s o sopro de oxig nio para avalia o dos resultados.
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Catharanthus roseus

Catharanthus roseus

S Rajashekara; D Reena M V Mainavi; L S Sandhya Utpal Baro

Verlag Unser Wissen
2022
pokkari
Catharanthus roseus (L.) G. Don (Hindi: Sadabahar सदाबहार & Kannada: Nityapushpa ನಿತ್ಯಪುಷ್ಪ) (Gew hnlicher Name: Cape/Madagascar/Pink/Rosy periwinkle) ist eine bl hende Pflanzenart in der Familie der Apocynaceae mit mehrj hriger Bl te, die in der traditionellen Medizin verwendet wird und mehrere wichtige Eigenschaften in alkoholischen Extrakten aus ihren Pflanzenteilen enth lt. Es ist eine pr chtige Zierpflanze, die von den ethnischen Gruppen f r medizinische und pharmakologische Anwendungen genutzt wird. Zierpflanzen spielten eine wichtige Rolle bei der Entdeckung neuer Medikamente, die haupts chlich in der modernen Medizin verwendet werden. Die biologische Methode zur Herstellung methanolischer Blattextrakte aus den Pflanzenteilen ist ein einfacher, kosteng nstiger und umweltfreundlicher Ansatz. Die Extrakte aus Wurzeln, Bl ttern, Bl ten und Fr chten k nnen als wirksame Arzneimittel f r verschiedene menschliche Krankheiten eingesetzt werden. Alkoholische Pflanzenextrakte wirken als krebshemmende, antimikrobielle, antioxidative, antitumorale, apoptotische und zytotoxische Mittel. Dies spielt eine wichtige Rolle in vielen wissenschaftlichen Bereichen wie der Pharmazie, Pharmakologie und Medizin. Die aktuelle Studie best tigt die therapeutische Wirksamkeit von C. roseus, die in der traditionellen Medizin und der modernen Pharmakologie verwendet werden kann.
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